emscripten/tests/runner.py

'''
Simple test runner

See settings.py file for options&params. Edit as needed.

These tests can be run in parallel using nose, for example

  nosetests --processes=4 -v -s tests/runner.py

will use 4 processes. To install nose do something like
|pip install nose| or |sudo apt-get install python-nose|.
'''

from subprocess import Popen, PIPE, STDOUT
import os, unittest, tempfile, shutil, time, inspect, sys, math, glob, tempfile, re, difflib, webbrowser

# Setup

__rootpath__ = os.path.abspath(os.path.dirname(os.path.dirname(__file__)))
def path_from_root(*pathelems):
  return os.path.join(__rootpath__, *pathelems)
exec(open(path_from_root('tools', 'shared.py'), 'r').read())

sys.path += [path_from_root('')]

# Sanity check for config

try:
  assert COMPILER_OPTS != None
except:
  raise Exception('Cannot find "COMPILER_OPTS" definition. Is ~/.emscripten set up properly? You may need to copy the template from settings.py into it.')

# Core test runner class, shared between normal tests and benchmarks

class RunnerCore(unittest.TestCase):
  save_dir = os.environ.get('EM_SAVE_DIR')
  save_JS = 0
  stderr_redirect = STDOUT # This avoids cluttering the test runner output, which is stderr too, with compiler warnings etc.
                           # Change this to None to get stderr reporting, for debugging purposes

  def setUp(self):
    Settings.reset()
    self.banned_js_engines = []
    if not self.save_dir:
      dirname = tempfile.mkdtemp(prefix='emscripten_test_' + self.__class__.__name__ + '_', dir=TEMP_DIR)
    else:
      dirname = EMSCRIPTEN_TEMP_DIR
    if not os.path.exists(dirname):
      os.makedirs(dirname)
    self.working_dir = dirname
    os.chdir(dirname)
    
  def tearDown(self):
    if self.save_JS:
      for name in os.listdir(self.get_dir()):
        if name.endswith(('.o.js', '.cc.js')):
          suff = '.'.join(name.split('.')[-2:])
          shutil.copy(os.path.join(self.get_dir(), name),
                      os.path.join(TEMP_DIR, self.id().replace('__main__.', '').replace('.test_', '.')+'.'+suff))
    if not self.save_dir:
      shutil.rmtree(self.get_dir())

  def skip(self, why):
    print >> sys.stderr, '<skipping: %s> ' % why,

  def get_dir(self):
    return self.working_dir

  def get_stdout_path(self):
    return os.path.join(self.get_dir(), 'stdout')

  def prep_ll_run(self, filename, ll_file, force_recompile=False, build_ll_hook=None):
    if ll_file.endswith(('.bc', '.o')):
      if ll_file != filename + '.o':
        shutil.copy(ll_file, filename + '.o')
      Building.llvm_dis(filename)
    else:
      shutil.copy(ll_file, filename + '.o.ll')

    #force_recompile = force_recompile or os.stat(filename + '.o.ll').st_size > 50000 # if the file is big, recompile just to get ll_opts # Recompiling just for dfe in ll_opts is too costly

    if Building.LLVM_OPTS or force_recompile or build_ll_hook:
      Building.ll_opts(filename)
      if build_ll_hook:
        need_post = build_ll_hook(filename)
      Building.llvm_as(filename)
      shutil.move(filename + '.o.ll', filename + '.o.ll.pre') # for comparisons later
      if Building.LLVM_OPTS:
        Building.llvm_opts(filename)
      Building.llvm_dis(filename)
      if build_ll_hook and need_post:
        build_ll_hook(filename)
        Building.llvm_as(filename)
        shutil.move(filename + '.o.ll', filename + '.o.ll.post') # for comparisons later
        Building.llvm_dis(filename)

  # Generate JS from ll, and optionally modify the generated JS with a post_build function. Note
  # that post_build is called on unoptimized JS, so we send it to emcc (otherwise, if run after
  # emcc, it would not apply on the optimized/minified JS)
  def ll_to_js(self, filename, extra_emscripten_args, post_build):
    if self.emcc_args is None:
      Building.emscripten(filename, append_ext=True, extra_args=extra_emscripten_args)
      if post_build is not None:
        exec post_build in locals()
        shutil.copyfile(filename + '.o.js', filename + '.o.js.prepost.js')
        process(filename + '.o.js')
    else:
      transform_args = []
      if post_build:
        transform_filename = os.path.join(self.get_dir(), 'transform.py')
        transform = open(transform_filename, 'w')
        transform.write('''
import sys
sys.path += ['%s']
''' % path_from_root(''))
        transform.write(post_build)
        transform.write('''
process(sys.argv[1])
''')
        transform.close()
        transform_args = ['--js-transform', "python %s" % transform_filename]
      Building.emcc(filename + '.o.ll', Settings.serialize() + self.emcc_args + transform_args, filename + '.o.js')

  # Build JavaScript code from source code
  def build(self, src, dirname, filename, output_processor=None, main_file=None, additional_files=[], libraries=[], includes=[], build_ll_hook=None, extra_emscripten_args=[], post_build=None):

    # Copy over necessary files for compiling the source
    if main_file is None:
      f = open(filename, 'w')
      f.write(src)
      f.close()
      assert len(additional_files) == 0
    else:
      # copy whole directory, and use a specific main .cpp file
      shutil.rmtree(dirname)
      shutil.copytree(src, dirname)
      shutil.move(os.path.join(dirname, main_file), filename)
      # the additional files were copied; alter additional_files to point to their full paths now
      additional_files = map(lambda f: os.path.join(dirname, f), additional_files)

    # C++ => LLVM binary
    os.chdir(dirname)
    cwd = os.getcwd()

    for f in [filename] + additional_files:
      try:
        # Make sure we notice if compilation steps failed
        os.remove(f + '.o')
      except:
        pass
      args = [Building.COMPILER, '-emit-llvm'] + COMPILER_OPTS + Building.COMPILER_TEST_OPTS + \
             ['-I', dirname, '-I', os.path.join(dirname, 'include')] + \
             map(lambda include: '-I' + include, includes) + \
             ['-c', f, '-o', f + '.o']
      output = Popen(args, stdout=PIPE, stderr=self.stderr_redirect).communicate()[0]
      assert os.path.exists(f + '.o'), 'Source compilation error: ' + output

    os.chdir(cwd)

    # Link all files
    if len(additional_files) + len(libraries) > 0:
      shutil.move(filename + '.o', filename + '.o.alone')
      Building.link([filename + '.o.alone'] + map(lambda f: f + '.o', additional_files) + libraries,
               filename + '.o')
      if not os.path.exists(filename + '.o'):
        print "Failed to link LLVM binaries:\n\n", output
        raise Exception("Linkage error");

    # Finalize
    self.prep_ll_run(filename, filename + '.o', build_ll_hook=build_ll_hook)

    # BC => JS
    self.ll_to_js(filename, extra_emscripten_args, post_build)

    if output_processor is not None:
      output_processor(open(filename + '.o.js').read())

  def run_generated_code(self, engine, filename, args=[], check_timeout=True):
    stdout = os.path.join(self.get_dir(), 'stdout') # use files, as PIPE can get too full and hang us
    stderr = os.path.join(self.get_dir(), 'stderr')
    try:
      cwd = os.getcwd()
    except:
      cwd = None
    os.chdir(self.get_dir())
    run_js(filename, engine, args, check_timeout, stdout=open(stdout, 'w'), stderr=open(stderr, 'w'))
    if cwd is not None:
      os.chdir(cwd)
    ret = open(stdout, 'r').read() + open(stderr, 'r').read()
    assert 'strict warning:' not in ret, 'We should pass all strict mode checks: ' + ret
    return ret

  def run_llvm_interpreter(self, args):
    return Popen([EXEC_LLVM] + args, stdout=PIPE, stderr=self.stderr_redirect).communicate()[0]

  def build_native(self, filename):
    Popen([CLANG, '-O2', filename, '-o', filename+'.native'], stdout=PIPE).communicate()[0]

  def run_native(self, filename, args):
    Popen([filename+'.native'] + args, stdout=PIPE).communicate()[0]

  def assertIdentical(self, x, y):
    if x != y:
      raise Exception("Expected to have '%s' == '%s', diff:\n\n%s" % (
        limit_size(x), limit_size(y),
        limit_size(''.join([a.rstrip()+'\n' for a in difflib.unified_diff(x.split('\n'), y.split('\n'), fromfile='expected', tofile='actual')]))
      ))

  def assertContained(self, values, string, additional_info=''):
    if type(values) not in [list, tuple]: values = [values]
    for value in values:
      if type(string) is not str: string = string()
      if value in string: return # success
    raise Exception("Expected to find '%s' in '%s', diff:\n\n%s\n%s" % (
      limit_size(values[0]), limit_size(string),
      limit_size(''.join([a.rstrip()+'\n' for a in difflib.unified_diff(values[0].split('\n'), string.split('\n'), fromfile='expected', tofile='actual')])),
      additional_info
    ))

  def assertNotContained(self, value, string):
    if type(value) is not str: value = value() # lazy loading
    if type(string) is not str: string = string()
    if value in string:
      raise Exception("Expected to NOT find '%s' in '%s', diff:\n\n%s" % (
        limit_size(value), limit_size(string),
        limit_size(''.join([a.rstrip()+'\n' for a in difflib.unified_diff(value.split('\n'), string.split('\n'), fromfile='expected', tofile='actual')]))
      ))

  library_cache = {}

  def get_library(self, name, generated_libs, configure=['./configure'], configure_args=[], make=['make'], make_args=['-j', '2'], cache=True):
    build_dir = self.get_build_dir()
    output_dir = self.get_dir()

    cache_name = name + '|' + Building.COMPILER
    if self.library_cache is not None:
      if cache and self.library_cache.get(cache_name):
        print >> sys.stderr,  '<load build from cache> ',
        bc_file = os.path.join(output_dir, 'lib' + name + '.bc')
        f = open(bc_file, 'wb')
        f.write(self.library_cache[cache_name])
        f.close()
        return bc_file

    print >> sys.stderr, '<building and saving into cache> ',

    return Building.build_library(name, build_dir, output_dir, generated_libs, configure, configure_args, make, make_args, self.library_cache, cache_name,
                                  copy_project=True)


###################################################################################################

sys.argv = map(lambda arg: arg if not arg.startswith('test_') else 'default.' + arg, sys.argv)

if 'benchmark' not in str(sys.argv) and 'sanity' not in str(sys.argv):
  # Tests

  print "Running Emscripten tests..."

  class T(RunnerCore): # Short name, to make it more fun to use manually on the commandline
    ## Does a complete test - builds, runs, checks output, etc.
    def do_run(self, src, expected_output=None, args=[], output_nicerizer=None, output_processor=None, no_build=False, main_file=None, additional_files=[], js_engines=None, post_build=None, basename='src.cpp', libraries=[], includes=[], force_c=False, build_ll_hook=None, extra_emscripten_args=[]):
        if force_c or (main_file is not None and main_file[-2:]) == '.c':
          basename = 'src.c'
          Building.COMPILER = to_cc(Building.COMPILER)

        dirname = self.get_dir()
        filename = os.path.join(dirname, basename)
        if not no_build:
          self.build(src, dirname, filename, main_file=main_file, additional_files=additional_files, libraries=libraries, includes=includes,
                     build_ll_hook=build_ll_hook, extra_emscripten_args=extra_emscripten_args, post_build=post_build)

        # If not provided with expected output, then generate it right now, using lli
        if expected_output is None:
          expected_output = self.run_llvm_interpreter([filename + '.o'])
          print '[autogenerated expected output: %20s]' % (expected_output[0:30].replace('\n', '|')+'...')

        # Run in both JavaScript engines, if optimizing - significant differences there (typed arrays)
        if js_engines is None:
          js_engines = JS_ENGINES
        if Settings.USE_TYPED_ARRAYS:
          js_engines = filter(lambda engine: engine != V8_ENGINE, js_engines) # V8 issue 1822
        js_engines = filter(lambda engine: engine not in self.banned_js_engines, js_engines)
        if len(js_engines) == 0: return self.skip('No JS engine present to run this test with. Check ~/.emscripten and settings.py and the paths therein.')
        for engine in js_engines:
          js_output = self.run_generated_code(engine, filename + '.o.js', args)
          if output_nicerizer is not None:
              js_output = output_nicerizer(js_output)
          self.assertContained(expected_output, js_output)
          self.assertNotContained('ERROR', js_output)

        #shutil.rmtree(dirname) # TODO: leave no trace in memory. But for now nice for debugging

    # No building - just process an existing .ll file (or .bc, which we turn into .ll)
    def do_ll_run(self, ll_file, expected_output=None, args=[], js_engines=None, output_nicerizer=None, post_build=None, force_recompile=False, build_ll_hook=None, extra_emscripten_args=[]):
      filename = os.path.join(self.get_dir(), 'src.cpp')

      self.prep_ll_run(filename, ll_file, force_recompile, build_ll_hook)

      self.ll_to_js(filename, extra_emscripten_args, post_build)

      self.do_run(None,
                   expected_output,
                   args,
                   no_build=True,
                   js_engines=js_engines,
                   output_nicerizer=output_nicerizer,
                   post_build=None) # post_build was already done in ll_to_js, this do_run call is just to test the output

    def test_hello_world(self):
        src = '''
          #include <stdio.h>
          int main()
          {
            printf("hello, world!\\n");
            return 0;
          }
        '''
        self.do_run(src, 'hello, world!')

    def test_intvars(self):
        src = '''
          #include <stdio.h>
          int global = 20;
          int *far;
          int main()
          {
            int x = 5;
            int y = x+17;
            int z = (y-1)/2; // Should stay an integer after division!
            y += 1;
            int w = x*3+4;
            int k = w < 15 ? 99 : 101;
            far = &k;
            *far += global;
            int i = k > 100; // Should be an int, not a bool!
            int j = i << 6;
            j >>= 1;
            j = j ^ 5;
            int h = 1;
            h |= 0;
            int p = h;
            p &= 0;
            printf("*%d,%d,%d,%d,%d,%d,%d,%d,%d*\\n", x, y, z, w, k, i, j, h, p);

            long hash = -1;
            size_t perturb;
            int ii = 0;
            for (perturb = hash; ; perturb >>= 5) {
              printf("%d:%d", ii, perturb);
              ii++;
              if (ii == 9) break;
              printf(",");
            }
            printf("*\\n");
            printf("*%.1d,%.2d*\\n", 56, 9);

            // Fixed-point math on 64-bit ints. Tricky to support since we have no 64-bit shifts in JS
            {
              struct Fixed {
                static int Mult(int a, int b) {
                  return ((long long)a * (long long)b) >> 16;
                }
              };
              printf("fixed:%d\\n", Fixed::Mult(150000, 140000));
            }

            printf("*%ld*%p\\n", (long)21, &hash); // The %p should not enter an infinite loop!
            return 0;
          }
        '''
        self.do_run(src, '*5,23,10,19,121,1,37,1,0*\n0:-1,1:134217727,2:4194303,3:131071,4:4095,5:127,6:3,7:0,8:0*\n*56,09*\nfixed:320434\n*21*')

    def test_sintvars(self):
        Settings.CORRECT_SIGNS = 1 # Relevant to this test
        src = '''
          #include <stdio.h>
          struct S {
            char *match_start;
            char *strstart;
          };
          int main()
          {
            struct S _s;
            struct S *s = &_s;
            unsigned short int sh;

            s->match_start = (char*)32522;
            s->strstart = (char*)(32780);
            printf("*%d,%d,%d*\\n", (int)s->strstart, (int)s->match_start, (int)(s->strstart - s->match_start));
            sh = s->strstart - s->match_start;
            printf("*%d,%d*\\n", sh, sh>>7);

            s->match_start = (char*)32999;
            s->strstart = (char*)(32780);
            printf("*%d,%d,%d*\\n", (int)s->strstart, (int)s->match_start, (int)(s->strstart - s->match_start));
            sh = s->strstart - s->match_start;
            printf("*%d,%d*\\n", sh, sh>>7);
          }
        '''
        output = '*32780,32522,258*\n*258,2*\n*32780,32999,-219*\n*65317,510*'
        Settings.CORRECT_OVERFLOWS = 0 # We should not need overflow correction to get this right
        self.do_run(src, output, force_c=True)

    def test_i64(self):
        for i64_mode in [0,1]:
          if i64_mode == 0 and Settings.USE_TYPED_ARRAYS != 0: continue # Typed arrays truncate i64
          if i64_mode == 1 and Settings.QUANTUM_SIZE == 1: continue # TODO: i64 mode 1 for q1

          Settings.I64_MODE = i64_mode
          src = '''
            #include <stdio.h>
            int main()
            {
              long long x = 0x0000def123450789ULL; // any bigger than this, and we
              long long y = 0x00020ef123456089ULL; // start to run into the double precision limit!
              printf("*%Ld,%Ld,%Ld,%Ld,%Ld*\\n", x, y, x | y, x & y, x ^ y, x >> 2, y << 2);

              printf("*");
              long long z = 13;
              int n = 0;
              while (z > 1) {
                printf("%.2f,", (float)z); // these must be integers!
                z = z >> 1;
                n++;
              }
              printf("*%d*\\n", n);
              return 0;
            }
          '''
          self.do_run(src, '*245127260211081,579378795077769,808077213656969,16428841631881,791648372025088*\n*13.00,6.00,3.00,*3*')

        if Settings.QUANTUM_SIZE == 1: return self.skip('TODO: i64 mode 1 for q1')

        # Stuff that only works in i64_mode = 1

        Settings.I64_MODE = 1

        src = r'''
          #include <time.h>
          #include <stdio.h>
          #include <stdint.h>

          int64_t returner1() { return 0x0000def123450789ULL; }
          int64_t returner2(int test) {
            while (test > 10) test /= 2; // confuse the compiler so it doesn't eliminate this function
            return test > 5 ? 0x0000def123450123ULL : 0ULL;
          }

          void modifier1(int64_t t) {
            t |= 12;
            printf("m1: %Ld\n", t);
          }
          void modifier2(int64_t &t) {
            t |= 12;
          }

          int truthy() {
            int x = time(0);
            while (x > 10) {
              x |= 7;
              x /= 2;
            }
            return x < 3;
          }

          struct IUB {
             int c;
             long long d;
          };

          IUB iub[] = {
             { 55, 17179869201 },
             { 122, 25769803837 },
          };

          int main()
          {
            int64_t x1 = 0x1234def123450789ULL;
            int64_t x2 = 0x1234def123450788ULL;
            int64_t x3 = 0x1234def123450789ULL;
            printf("*%Ld\n%d,%d,%d,%d,%d\n%d,%d,%d,%d,%d*\n", x1, x1==x2, x1<x2, x1<=x2, x1>x2, x1>=x2, // note: some rounding in the printing!
                                                                  x1==x3, x1<x3, x1<=x3, x1>x3, x1>=x3);
            printf("*%Ld*\n", returner1());
            printf("*%Ld*\n", returner2(30));

            uint64_t maxx = -1ULL;
            printf("*%Lu*\n*%Lu*\n", maxx, maxx >> 5);

            // Make sure params are not modified if they shouldn't be
            int64_t t = 123;
            modifier1(t);
            printf("*%Ld*\n", t);
            modifier2(t);
            printf("*%Ld*\n", t);

            // global structs with i64s
            printf("*%d,%Ld*\n*%d,%Ld*\n", iub[0].c, iub[0].d, iub[1].c, iub[1].d);

            // Math mixtures with doubles
            {
              uint64_t a = 5;
              double b = 6.8;
              uint64_t c = a * b;
              printf("*prod:%llu*\n*%d,%d,%d*", c, (int)&a, (int)&b, (int)&c); // printing addresses prevents optimizations
            }

            // Basic (rounded, for now) math. Just check compilation.
            int64_t a = 0x1234def123450789ULL;
            a--; if (truthy()) a--; // confuse optimizer
            int64_t b = 0x1234000000450789ULL;
            b++; if (truthy()) b--; // confuse optimizer
            printf("*%Ld,%Ld,%Ld,%Ld*\n",   (a+b)/5000, (a-b)/5000, (a*3)/5000, (a/5)/5000);

            return 0;
          }
        '''
        self.do_run(src, '*1311918518731868200\n0,0,0,1,1\n1,0,1,0,1*\n*245127260211081*\n*245127260209443*\n' +
                         '*18446744073709552000*\n*576460752303423500*\n' +
                         'm1: 127\n*123*\n*127*\n' +
                         '*55,17179869201*\n*122,25769803837*\n' +
                         '*prod:34*\n')

        Settings.CORRECT_SIGNS = 1

        src = r'''
          #include <stdio.h>
          #include <stdint.h>

          int main()
          {
            // i32 vs i64
            int32_t small = -1;
            int64_t large = -1;
            printf("*%d*\n", small == large);
            small++;
            printf("*%d*\n", small == large);
            uint32_t usmall = -1;
            uint64_t ularge = -1;
            printf("*%d*\n", usmall == ularge);
            return 0;
          }
        '''

        self.do_run(src, '*1*\n*0*\n*0*\n')

    def test_unaligned(self):
        if Settings.QUANTUM_SIZE == 1: return self.skip('No meaning to unaligned addresses in q1')

        src = r'''
          #include<stdio.h>

          struct S {
            double x;
            int y;
          };

          int main() {
            // the 64-bit value here will not always be 8-byte aligned
            S s[3] = { {0x12a751f430142, 22}, {0x17a5c85bad144, 98}, {1, 1}};
            printf("*%d : %d : %d\n", sizeof(S), ((unsigned int)&s[0]) % 8 != ((unsigned int)&s[1]) % 8,
                                                 ((unsigned int)&s[1]) - ((unsigned int)&s[0]));
            s[0].x++;
            s[0].y++;
            s[1].x++;
            s[1].y++;
            printf("%.1f,%d,%.1f,%d\n", s[0].x, s[0].y, s[1].x, s[1].y);
            return 0;
          }
          '''

        # TODO: A version of this with int64s as well
        self.do_run(src, '*12 : 1 : 12\n328157500735811.0,23,416012775903557.0,99\n')

        return # TODO: continue to the next part here

        # Test for undefined behavior in C. This is not legitimate code, but does exist

        if Settings.USE_TYPED_ARRAYS != 2: return self.skip('No meaning to unaligned addresses without t2')

        src = r'''
          #include <stdio.h>

          int main()
          {
            int x[10];
            char *p = (char*)&x[0];
            p++;
            short *q = (short*)p;
            *q = 300;
            printf("*%d:%d*\n", *q, ((int)q)%2);
            int *r = (int*)p;
            *r = 515559;
            printf("*%d*\n", *r);
            long long *t = (long long*)p;
            *t = 42949672960;
            printf("*%Ld*\n", *t);
            return 0;
          }
        '''

        Settings.EMULATE_UNALIGNED_ACCESSES = 0

        try:
          self.do_run(src, '*300:1*\n*515559*\n*42949672960*\n')
        except Exception, e:
          assert 'must be aligned' in str(e), e # expected to fail without emulation

        # XXX TODO Settings.EMULATE_UNALIGNED_ACCESSES = 1
        #self.do_run(src, '*300:1*\n*515559*\n*42949672960*\n') # but succeeds with it

    def test_unsigned(self):
        Settings.CORRECT_SIGNS = 1 # We test for exactly this sort of thing here
        Settings.CHECK_SIGNS = 0
        src = '''
          #include <stdio.h>
          const signed char cvals[2] = { -1, -2 }; // compiler can store this is a string, so -1 becomes \FF, and needs re-signing
          int main()
          {
            {
              unsigned char x = 200;
              printf("*%d*\\n", x);
              unsigned char y = -22;
              printf("*%d*\\n", y);
            }

            int varey = 100;
            unsigned int MAXEY = -1, MAXEY2 = -77;
            printf("*%u,%d,%u*\\n", MAXEY, varey >= MAXEY, MAXEY2); // 100 >= -1? not in unsigned!

            int y = cvals[0];
            printf("*%d,%d,%d,%d*\\n", cvals[0], cvals[0] < 0, y, y < 0);
            y = cvals[1];
            printf("*%d,%d,%d,%d*\\n", cvals[1], cvals[1] < 0, y, y < 0);

            // zext issue - see mathop in jsifier
            unsigned char x8 = -10;
            unsigned long hold = 0;
            hold += x8;
            int y32 = hold+50;
            printf("*%u,%u*\\n", hold, y32);

            // Comparisons
            x8 = 0;
            for (int i = 0; i < 254; i++) x8++; // make it an actual 254 in JS - not a -2
            printf("*%d,%d*\\n", x8+1 == 0xff, x8+1 != 0xff); // 0xff may be '-1' in the bitcode

            return 0;
          }
        '''
        self.do_run(src)#, '*4294967295,0,4294967219*\n*-1,1,-1,1*\n*-2,1,-2,1*\n*246,296*\n*1,0*')

        # Now let's see some code that should just work in USE_TYPED_ARRAYS == 2, but requires
        # corrections otherwise
        if Settings.USE_TYPED_ARRAYS == 2:
          Settings.CORRECT_SIGNS = 0
          Settings.CHECK_SIGNS = 1
        else:
          Settings.CORRECT_SIGNS = 1
          Settings.CHECK_SIGNS = 0

        src = '''
          #include <stdio.h>
          int main()
          {
            {
              unsigned char x;
              unsigned char *y = &x;
              *y = -1;
              printf("*%d*\\n", x);
            }
            {
              unsigned short x;
              unsigned short *y = &x;
              *y = -1;
              printf("*%d*\\n", x);
            }
            /*{ // This case is not checked. The hint for unsignedness is just the %u in printf, and we do not analyze that
              unsigned int x;
              unsigned int *y = &x;
              *y = -1;
              printf("*%u*\\n", x);
            }*/
            {
              char x;
              char *y = &x;
              *y = 255;
              printf("*%d*\\n", x);
            }
            {
              char x;
              char *y = &x;
              *y = 65535;
              printf("*%d*\\n", x);
            }
            {
              char x;
              char *y = &x;
              *y = 0xffffffff;
              printf("*%d*\\n", x);
            }
            return 0;
          }
        '''
        self.do_run(src, '*255*\n*65535*\n*-1*\n*-1*\n*-1*')

    def test_bitfields(self):
        Settings.SAFE_HEAP = 0 # bitfields do loads on invalid areas, by design
        src = '''
          #include <stdio.h>
          struct bitty {
            unsigned x : 1;
            unsigned y : 1;
            unsigned z : 1;
          };
          int main()
          {
            bitty b;
            printf("*");
            for (int i = 0; i <= 1; i++)
              for (int j = 0; j <= 1; j++)
                for (int k = 0; k <= 1; k++) {
                  b.x = i;
                  b.y = j;
                  b.z = k;
                  printf("%d,%d,%d,", b.x, b.y, b.z);
                }
            printf("*\\n");
            return 0;
          }
        '''
        self.do_run(src, '*0,0,0,0,0,1,0,1,0,0,1,1,1,0,0,1,0,1,1,1,0,1,1,1,*')

    def test_floatvars(self):
        src = '''
          #include <stdio.h>
          int main()
          {
            float x = 1.234, y = 3.5, q = 0.00000001;
            y *= 3;
            int z = x < y;
            printf("*%d,%d,%.1f,%d,%.4f,%.2f*\\n", z, int(y), y, (int)x, x, q);

            /*
            // Rounding behavior
            float fs[6] = { -2.75, -2.50, -2.25, 2.25, 2.50, 2.75 };
            double ds[6] = { -2.75, -2.50, -2.25, 2.25, 2.50, 2.75 };
            for (int i = 0; i < 6; i++)
              printf("*int(%.2f)=%d,%d*\\n", fs[i], int(fs[i]), int(ds[i]));
            */

            return 0;
          }
        '''
        self.do_run(src, '*1,10,10.5,1,1.2340,0.00*')

    def test_math(self):
        src = '''
          #include <stdio.h>
          #include <cmath>
          int main()
          {
            printf("*%.2f,%.2f,%d", M_PI, -M_PI, (1/0.0) > 1e300); // could end up as infinity, or just a very very big number
            printf(",%d", finite(NAN) != 0);
            printf(",%d", finite(INFINITY) != 0);
            printf(",%d", finite(-INFINITY) != 0);
            printf(",%d", finite(12.3) != 0);
            printf(",%d", isinf(NAN) != 0);
            printf(",%d", isinf(INFINITY) != 0);
            printf(",%d", isinf(-INFINITY) != 0);
            printf(",%d", isinf(12.3) != 0);
            printf("*\\n");
            return 0;
          }
        '''
        self.do_run(src, '*3.14,-3.14,1,0,0,0,1,0,1,1,0*')

    def test_math_hyperbolic(self):
        src = open(path_from_root('tests', 'hyperbolic', 'src.c'), 'r').read()
        expected = open(path_from_root('tests', 'hyperbolic', 'output.txt'), 'r').read()
        self.do_run(src, expected)

    def test_getgep(self):
        # Generated code includes getelementptr (getelementptr, 0, 1), i.e., GEP as the first param to GEP
        src = '''
          #include <stdio.h>
          struct {
            int y[10];
            int z[10];
          } commonblock;

          int main()
          {
            for (int i = 0; i < 10; ++i) {
              commonblock.y[i] = 1;
              commonblock.z[i] = 2;
            }
            printf("*%d %d*\\n", commonblock.y[0], commonblock.z[0]);
            return 0;
          }
        '''
        self.do_run(src, '*1 2*')

    def test_if(self):
        src = '''
          #include <stdio.h>
          int main()
          {
            int x = 5;
            if (x > 3) {
              printf("*yes*\\n");
            }
            return 0;
          }
        '''
        self.do_run(src, '*yes*')

    def test_if_else(self):
        src = '''
          #include <stdio.h>
          int main()
          {
            int x = 5;
            if (x > 10) {
              printf("*yes*\\n");
            } else {
              printf("*no*\\n");
            }
            return 0;
          }
        '''
        self.do_run(src, '*no*')

    def test_loop(self):
        src = '''
          #include <stdio.h>
          int main()
          {
            int x = 5;
            for (int i = 0; i < 6; i++) {
              x += x*i;
              if (x > 1000) {
                if (x % 7 == 0) printf("cheez\\n");
                x /= 2;
                break;
              }
            }
            printf("*%d*\\n", x);
            return 0;
          }
        '''

        self.do_run(src)

        generated = open('src.cpp.o.js', 'r').read()
        assert '__label__ ==' not in generated, 'We should hoist into the loop'

    def test_stack(self):
        src = '''
          #include <stdio.h>
          int test(int i) {
            int x = 10;
            if (i > 0) {
              return test(i-1);
            }
            return int(&x); // both for the number, and forces x to not be nativized
          }
          int main()
          {
            // We should get the same value for the first and last - stack has unwound
            int x1 = test(0);
            int x2 = test(100);
            int x3 = test(0);
            printf("*%d,%d*\\n", x3-x1, x2 != x1);
            return 0;
          }
        '''
        self.do_run(src, '*0,1*')

    def test_strings(self):
        src = '''
          #include <stdio.h>
          #include <stdlib.h>
          #include <string.h>

          int main(int argc, char **argv)
          {
            int x = 5, y = 9, magic = 7; // fool compiler with magic
            memmove(&x, &y, magic-7); // 0 should not crash us

            int xx, yy, zz;
            char s[32];
            int cc = sscanf("abc_10.b1_xyz_543_defg", "abc_%d.%2x_xyz_%3d_%3s", &xx, &yy, &zz, s);
            printf("%d:%d,%d,%d,%s\\n", cc, xx, yy, zz, s);

            printf("%d\\n", argc);
            puts(argv[1]);
            puts(argv[2]);
            printf("%d\\n", atoi(argv[3])+2);
            const char *foolingthecompiler = "\\rabcd";
            printf("%d\\n", strlen(foolingthecompiler)); // Tests parsing /0D in llvm - should not be a 0 (end string) then a D!
            printf("%s\\n", NULL); // Should print '(null)', not the string at address 0, which is a real address for us!
            printf("/* a comment */\\n"); // Should not break the generated code!
            printf("// another\\n"); // Should not break the generated code!

            char* strdup_val = strdup("test");
            printf("%s\\n", strdup_val);
            free(strdup_val);

            return 0;
          }
        '''
        self.do_run(src, '4:10,177,543,def\n4\nwowie\ntoo\n76\n5\n(null)\n/* a comment */\n// another\ntest\n', ['wowie', 'too', '74'])

    def test_errar(self):
        src = r'''
          #include <stdio.h>
          #include <errno.h>
          #include <string.h>

          int main() {
            char* err;
            char buffer[200];

            err = strerror(EDOM);
            strerror_r(EWOULDBLOCK, buffer, 200);
            printf("<%s>\n", err);
            printf("<%s>\n", buffer);

            printf("<%d>\n", strerror_r(EWOULDBLOCK, buffer, 0));
            errno = 123;
            printf("<%d>\n", errno);

            return 0;
          }
          '''
        expected = '''
          <Numerical argument out of domain>
          <Resource temporarily unavailable>
          <34>
          <123>
          '''
        self.do_run(src, re.sub('(^|\n)\s+', '\\1', expected))

    def test_mainenv(self):
        src = '''
          #include <stdio.h>
          int main(int argc, char **argv, char **envp)
          {
            printf("*%p*\\n", envp);
            return 0;
          }
        '''
        self.do_run(src, '*(nil)*')

    def test_funcs(self):
        src = '''
          #include <stdio.h>
          int funcy(int x)
          {
            return x*9;
          }
          int main()
          {
            printf("*%d,%d*\\n", funcy(8), funcy(10));
            return 0;
          }
        '''
        self.do_run(src, '*72,90*')

    def test_structs(self):
        src = '''
          #include <stdio.h>
          struct S
          {
            int x, y;
          };
          int main()
          {
            S a, b;
            a.x = 5; a.y = 6;
            b.x = 101; b.y = 7009;
            S *c, *d;
            c = &a;
            c->x *= 2;
            c = &b;
            c->y -= 1;
            d = c;
            d->y += 10;
            printf("*%d,%d,%d,%d,%d,%d,%d,%d*\\n", a.x, a.y, b.x, b.y, c->x, c->y, d->x, d->y);
            return 0;
          }
        '''
        self.do_run(src, '*10,6,101,7018,101,7018,101,7018*')

    gen_struct_src = '''
          #include <stdio.h>
          #include <stdlib.h>
          #include "emscripten.h"

          struct S
          {
            int x, y;
          };
          int main()
          {
            S* a = {{gen_struct}};
            a->x = 51; a->y = 62;
            printf("*%d,%d*\\n", a->x, a->y);
            {{del_struct}}(a);
            return 0;
          }
    '''

    def test_mallocstruct(self):
        self.do_run(self.gen_struct_src.replace('{{gen_struct}}', '(S*)malloc(sizeof(S))').replace('{{del_struct}}', 'free'), '*51,62*')

    def test_newstruct(self):
        self.do_run(self.gen_struct_src.replace('{{gen_struct}}', 'new S').replace('{{del_struct}}', 'delete'), '*51,62*')

    def test_addr_of_stacked(self):
        src = '''
          #include <stdio.h>
          void alter(int *y)
          {
            *y += 5;
          }
          int main()
          {
            int x = 2;
            alter(&x);
            printf("*%d*\\n", x);
            return 0;
          }
        '''
        self.do_run(src, '*7*')

    def test_globals(self):
        src = '''
          #include <stdio.h>

          char cache[256], *next = cache;

          int main()
          {
            cache[10] = 25;
            next[20] = 51;
            printf("*%d,%d*\\n", next[10], cache[20]);
            return 0;
          }
        '''
        self.do_run(src, '*25,51*')

    def test_linked_list(self):
        src = '''
          #include <stdio.h>
          struct worker_args {
            int value;
            struct worker_args *next;
          };
          int main()
          {
            worker_args a;
            worker_args b;
            a.value = 60;
            a.next = &b;
            b.value = 900;
            b.next = NULL;
            worker_args* c = &a;
            int total = 0;
            while (c) {
              total += c->value;
              c = c->next;
            }

            // Chunk of em
            worker_args chunk[10];
            for (int i = 0; i < 9; i++) {
              chunk[i].value = i*10;
              chunk[i].next = &chunk[i+1];
            }
            chunk[9].value = 90;
            chunk[9].next = &chunk[0];

            c = chunk;
            do {
              total += c->value;
              c = c->next;
            } while (c != chunk);
 
            printf("*%d,%d*\\n", total, b.next);
            // NULL *is* 0, in C/C++. No JS null! (null == 0 is false, etc.)

            return 0;
          }
        '''
        self.do_run(src, '*1410,0*')

    def test_sup(self):
        src = '''
          #include <stdio.h>

          struct S4   { int x;          }; // size: 4
          struct S4_2 { short x, y;     }; // size: 4, but for alignment purposes, 2
          struct S6   { short x, y, z;  }; // size: 6
          struct S6w  { char x[6];      }; // size: 6 also
          struct S6z  { int x; short y; }; // size: 8, since we align to a multiple of the biggest - 4

          struct C___  { S6 a, b, c; int later; };
          struct Carr  { S6 a[3]; int later; }; // essentially the same, but differently defined
          struct C__w  { S6 a; S6w b; S6 c; int later; }; // same size, different struct
          struct Cp1_  { int pre; short a; S6 b, c; int later; }; // fillers for a
          struct Cp2_  { int a; short pre; S6 b, c; int later; }; // fillers for a (get addr of the other filler)
          struct Cint  { S6 a; int  b; S6 c; int later; }; // An int (different size) for b
          struct C4__  { S6 a; S4   b; S6 c; int later; }; // Same size as int from before, but a struct
          struct C4_2  { S6 a; S4_2 b; S6 c; int later; }; // Same size as int from before, but a struct with max element size 2
          struct C__z  { S6 a; S6z  b; S6 c; int later; }; // different size, 8 instead of 6

          int main()
          {
            #define TEST(struc) \\
            { \\
              struc *s = 0; \\
              printf("*%s: %d,%d,%d,%d<%d*\\n", #struc, (int)&(s->a), (int)&(s->b), (int)&(s->c), (int)&(s->later), sizeof(struc)); \\
            }
            #define TEST_ARR(struc) \\
            { \\
              struc *s = 0; \\
              printf("*%s: %d,%d,%d,%d<%d*\\n", #struc, (int)&(s->a[0]), (int)&(s->a[1]), (int)&(s->a[2]), (int)&(s->later), sizeof(struc)); \\
            }
            printf("sizeofs:%d,%d\\n", sizeof(S6), sizeof(S6z));
            TEST(C___);
            TEST_ARR(Carr);
            TEST(C__w);
            TEST(Cp1_);
            TEST(Cp2_);
            TEST(Cint);
            TEST(C4__);
            TEST(C4_2);
            TEST(C__z);
            return 1;
          }
        '''
        if Settings.QUANTUM_SIZE == 1:
          self.do_run(src, 'sizeofs:6,8\n*C___: 0,3,6,9<24*\n*Carr: 0,3,6,9<24*\n*C__w: 0,3,9,12<24*\n*Cp1_: 1,2,5,8<24*\n*Cp2_: 0,2,5,8<24*\n*Cint: 0,3,4,7<24*\n*C4__: 0,3,4,7<24*\n*C4_2: 0,3,5,8<20*\n*C__z: 0,3,5,8<28*')
        else:
          self.do_run(src, 'sizeofs:6,8\n*C___: 0,6,12,20<24*\n*Carr: 0,6,12,20<24*\n*C__w: 0,6,12,20<24*\n*Cp1_: 4,6,12,20<24*\n*Cp2_: 0,6,12,20<24*\n*Cint: 0,8,12,20<24*\n*C4__: 0,8,12,20<24*\n*C4_2: 0,6,10,16<20*\n*C__z: 0,8,16,24<28*')

    def test_assert(self):
        src = '''
          #include <stdio.h>
          #include <assert.h>
          int main() {
            assert(1 == true); // pass
            assert(1 == false); // fail
            return 1;
          }
        '''
        self.do_run(src, 'Assertion failed: 1 == false')

    def test_exceptions(self):
        self.banned_js_engines = [NODE_JS] # node issue 1669, exception causes stdout not to be flushed
        Settings.DISABLE_EXCEPTION_CATCHING = 0

        src = '''
          #include <stdio.h>
          void thrower() {
            printf("infunc...");
            throw(99);
            printf("FAIL");
          }
          int main() {
            try {
              printf("*throw...");
              throw(1);
              printf("FAIL");
            } catch(...) {
              printf("caught!");
            }
            try {
              thrower();
            } catch(...) {
              printf("done!*\\n");
            }
            return 1;
          }
        '''
        self.do_run(src, '*throw...caught!infunc...done!*')

        Settings.DISABLE_EXCEPTION_CATCHING = 1
        self.do_run(src, 'Compiled code throwing an exception')

    def test_typed_exceptions(self):
        return self.skip('TODO: fix this for llvm 3.0')

        Settings.SAFE_HEAP = 0  # Throwing null will cause an ignorable null pointer access.
        Settings.EXCEPTION_DEBUG = 0  # Messes up expected output.
        src = open(path_from_root('tests', 'exceptions', 'typed.cpp'), 'r').read()
        expected = open(path_from_root('tests', 'exceptions', 'output.txt'), 'r').read()
        self.do_run(src, expected)

    def test_class(self):
        src = '''
          #include <stdio.h>
          struct Random {
             enum { IM = 139968, IA = 3877, IC = 29573 };
             Random() : last(42) {}
             float get( float max = 1.0f ) {
                last = ( last * IA + IC ) % IM;
                return max * last / IM;
             }
          protected:
             unsigned int last;
          } rng1;
          int main()
          {
            Random rng2;
            int count = 0;
            for (int i = 0; i < 100; i++) {
              float x1 = rng1.get();
              float x2 = rng2.get();
              printf("%f, %f\\n", x1, x2);
              if (x1 != x2) count += 1;
            }
            printf("*%d*\\n", count);
            return 0;
          }
        '''
        self.do_run(src, '*0*')

    def test_inherit(self):
        src = '''
          #include <stdio.h>
          struct Parent {
            int x1, x2;
          };
          struct Child : Parent {
            int y;
          };
          int main()
          {
            Parent a;
            a.x1 = 50;
            a.x2 = 87;
            Child b;
            b.x1 = 78;
            b.x2 = 550;
            b.y = 101;
            Child* c = (Child*)&a;
            c->x1 ++;
            c = &b;
            c->y --;
            printf("*%d,%d,%d,%d,%d,%d,%d*\\n", a.x1, a.x2, b.x1, b.x2, b.y, c->x1, c->x2);
            return 0;
          }
        '''
        self.do_run(src, '*51,87,78,550,100,78,550*')

    def test_polymorph(self):
        src = '''
          #include <stdio.h>
          struct Pure {
            virtual int implme() = 0;
          };
          struct Parent : Pure {
            virtual int getit() { return 11; };
            int implme() { return 32; }
          };
          struct Child : Parent {
            int getit() { return 74; }
            int implme() { return 1012; }
          };

          struct Other {
            int one() { return 11; }
            int two() { return 22; }
          };

          int main()
          {
            Parent *x = new Parent();
            Parent *y = new Child();
            printf("*%d,%d,%d,%d*\\n", x->getit(), y->getit(), x->implme(), y->implme());

            Other *o = new Other;
            int (Other::*Ls)() = &Other::one;
            printf("*%d*\\n", (o->*(Ls))());
            Ls = &Other::two;
            printf("*%d*\\n", (o->*(Ls))());

            return 0;
          }
        '''
        self.do_run(src, '*11,74,32,1012*\n*11*\n*22*')

    def test_dynamic_cast(self):
        src = '''
          #include <stdio.h>

          class CBase { virtual void dummy() {} };
          class CDerived : public CBase { int a; };
          class CDerivedest : public CDerived { float b; };

          int main ()
          {
            CBase *pa = new CBase;
            CBase *pb = new CDerived;
            CBase *pc = new CDerivedest;

            printf("a1: %d\\n", dynamic_cast<CDerivedest*>(pa) != NULL);
            printf("a2: %d\\n", dynamic_cast<CDerived*>(pa) != NULL);
            printf("a3: %d\\n", dynamic_cast<CBase*>(pa) != NULL);

            printf("b1: %d\\n", dynamic_cast<CDerivedest*>(pb) != NULL);
            printf("b2: %d\\n", dynamic_cast<CDerived*>(pb) != NULL);
            printf("b3: %d\\n", dynamic_cast<CBase*>(pb) != NULL);

            printf("c1: %d\\n", dynamic_cast<CDerivedest*>(pc) != NULL);
            printf("c2: %d\\n", dynamic_cast<CDerived*>(pc) != NULL);
            printf("c3: %d\\n", dynamic_cast<CBase*>(pc) != NULL);

            return 0;
          }
        '''
        self.do_run(src, 'a1: 0\na2: 0\na3: 1\nb1: 0\nb2: 1\nb3: 1\nc1: 1\nc2: 1\nc3: 1\n')

    def test_funcptr(self):
        src = '''
          #include <stdio.h>
          int calc1() { return 26; }
          int calc2() { return 90; }
          typedef int (*fp_t)();

          fp_t globally1 = calc1;
          fp_t globally2 = calc2;

          int nothing(const char *str) { return 0; }

          int main()
          {
            fp_t fp = calc1;
            void *vp = (void*)fp;
            fp_t fpb = (fp_t)vp;
            fp_t fp2 = calc2;
            void *vp2 = (void*)fp2;
            fp_t fpb2 = (fp_t)vp2;
            printf("*%d,%d,%d,%d,%d,%d*\\n", fp(), fpb(), fp2(), fpb2(), globally1(), globally2());

            fp_t t = calc1;
            printf("*%d,%d", t == calc1, t == calc2);
            t = calc2;
            printf(",%d,%d*\\n", t == calc1, t == calc2);

            int (*other)(const char *str);
            other = nothing;
            other("*hello!*");
            other = puts;
            other("*goodbye!*");

            return 0;
          }
        '''
        self.do_run(src, '*26,26,90,90,26,90*\n*1,0,0,1*\n*goodbye!*')

    def test_mathfuncptr(self):
        src = '''
          #include <math.h>
          #include <stdio.h>

          int
          main(void) {
           float (*fn)(float) = &sqrtf;
           float (*fn2)(float) = &fabsf;
           printf("fn2(-5) = %d, fn(10) = %f\\n", (int)fn2(-5), fn(10));
           return 0;
          }
          '''
        self.do_run(src, 'fn2(-5) = 5, fn(10) = 3.16')

    def test_emptyclass(self):
        src = '''
        #include <stdio.h>

        struct Randomized {
          Randomized(int x) {
            printf("*zzcheezzz*\\n");
          }
        };

        int main( int argc, const char *argv[] ) {
          new Randomized(55);

          return 0;
        }
        '''
        self.do_run(src, '*zzcheezzz*')

    def test_alloca(self):
      src = '''
        #include <stdio.h>
        #include <stdlib.h>

        int main() {
          char *pc;
          pc = (char *)alloca(5);
          printf("z:%d*%d*\\n", pc > 0, (int)pc);
          return 0;
        }
      '''
      self.do_run(src, 'z:1*', force_c=True)

      if self.emcc_args is not None: # too slow in other modes
        # We should not blow up the stack with numerous allocas

        src = '''
          #include <stdio.h>
          #include <stdlib.h>

          func(int i) {
            char *pc = (char *)alloca(100);
            *pc = i;
            (*pc)++;
            return (*pc) % 10;
          }
          int main() {
            int total = 0;
            for (int i = 0; i < 1024*1024; i++)
              total += func(i);
            printf("ok:%d*\\n", total);
            return 0;
          }
        '''
        self.do_run(src, 'ok:-32768*', force_c=True)

        # We should also not blow up the stack with byval arguments
        src = r'''
          #include<stdio.h>
          struct vec {
            int x, y, z;
            vec(int x_, int y_, int z_) : x(x_), y(y_), z(z_) {}
            static vec add(vec a, vec b) {
              return vec(a.x+b.x, a.y+b.y, a.z+b.z);
            }
          };
          int main() {
            int total = 0;
            for (int i = 0; i < 1000; i++) {
              for (int j = 0; j < 1000; j++) {
                vec c(i+i%10, j*2, i%255);
                vec d(j*2, j%255, i%120);
                vec f = vec::add(c, d);
                total += (f.x + f.y + f.z) % 100;
                total %= 10240;
              }
            }
            printf("sum:%d*\n", total);
            return 1;
          }
        '''
        self.do_run(src, 'sum:9780*')

    def test_array2(self):
        src = '''
          #include <stdio.h>

          static const double grid[4][2] = {
           {-3/3.,-1/3.},{+1/3.,-3/3.},
           {-1/3.,+3/3.},{+3/3.,+1/3.}
          };

          int main() {
            for (int i = 0; i < 4; i++)
              printf("%d:%.2f,%.2f ", i, grid[i][0], grid[i][1]);
            printf("\\n");
            return 0;
          }
          '''
        self.do_run(src, '0:-1.00,-0.33 1:0.33,-1.00 2:-0.33,1.00 3:1.00,0.33')

    def test_array2b(self):
        src = '''
          #include <stdio.h>

          static const struct {
            unsigned char left;
            unsigned char right;
          } prioritah[] = {
             {6, 6}, {6, 6}, {7, 95}, {7, 7}
          };

          int main() {
            printf("*%d,%d\\n", prioritah[1].left, prioritah[1].right);
            printf("%d,%d*\\n", prioritah[2].left, prioritah[2].right);
            return 0;
          }
          '''
        self.do_run(src, '*6,6\n7,95*')


    def test_constglobalstructs(self):
        src = '''
          #include <stdio.h>
          struct IUB {
             int c;
             double p;
             unsigned int pi;
          };

          IUB iub[] = {
             { 'a', 0.27, 5 },
             { 'c', 0.15, 4 },
             { 'g', 0.12, 3 },
             { 't', 0.27, 2 },
          };

          const unsigned char faceedgesidx[6][4] =
          {
              { 4, 5, 8, 10 },
              { 6, 7, 9, 11 },
              { 0, 2, 8, 9  },
              { 1, 3, 10,11 },
              { 0, 1, 4, 6 },
              { 2, 3, 5, 7 },
          };

          int main( int argc, const char *argv[] ) {
             printf("*%d,%d,%d,%d*\\n", iub[0].c, int(iub[1].p*100), iub[2].pi, faceedgesidx[3][2]);
             return 0;
          }
          '''
        self.do_run(src, '*97,15,3,10*')

    def test_conststructs(self):
        src = '''
          #include <stdio.h>
          struct IUB {
             int c;
             double p;
             unsigned int pi;
          };

          int main( int argc, const char *argv[] ) {
             int before = 70;
             IUB iub[] = {
                { 'a', 0.3029549426680, 5 },
                { 'c', 0.15, 4 },
                { 'g', 0.12, 3 },
                { 't', 0.27, 2 },
             };
             int after = 90;
             printf("*%d,%d,%d,%d,%d,%d*\\n", before, iub[0].c, int(iub[1].p*100), iub[2].pi, int(iub[0].p*10000), after);
             return 0;
          }
          '''
        self.do_run(src, '*70,97,15,3,3029,90*')

    def test_mod_globalstruct(self):
        src = '''
          #include <stdio.h>

          struct malloc_params {
            size_t magic, page_size;
          };

          malloc_params mparams;

          #define SIZE_T_ONE ((size_t)1)
          #define page_align(S) (((S) + (mparams.page_size - SIZE_T_ONE)) & ~(mparams.page_size - SIZE_T_ONE))

          int main()
          {
            mparams.page_size = 4096;
            printf("*%d,%d,%d,%d*\\n", mparams.page_size, page_align(1000), page_align(6000), page_align(66474));
            return 0;
          }
        '''
        self.do_run(src, '*4096,4096,8192,69632*')

    def test_pystruct(self):
        src = '''
          #include <stdio.h>

          // Based on CPython code
          union PyGC_Head {
              struct {
                  union PyGC_Head *gc_next;
                  union PyGC_Head *gc_prev;
                  size_t gc_refs;
              } gc;
              long double dummy;  /* force worst-case alignment */
          } ;

          struct gc_generation {
              PyGC_Head head;
              int threshold; /* collection threshold */
              int count; /* count of allocations or collections of younger
                            generations */
          };

          #define NUM_GENERATIONS 3
          #define GEN_HEAD(n) (&generations[n].head)

          /* linked lists of container objects */
          static struct gc_generation generations[NUM_GENERATIONS] = {
              /* PyGC_Head,                               threshold,      count */
              {{{GEN_HEAD(0), GEN_HEAD(0), 0}},           700,            0},
              {{{GEN_HEAD(1), GEN_HEAD(1), 0}},           10,             0},
              {{{GEN_HEAD(2), GEN_HEAD(2), 0}},           10,             0},
          };

          int main()
          {
            gc_generation *n = NULL;
            printf("*%d,%d,%d,%d,%d,%d,%d,%d*\\n",
              (int)(&n[0]),
              (int)(&n[0].head),
              (int)(&n[0].head.gc.gc_next),
              (int)(&n[0].head.gc.gc_prev),
              (int)(&n[0].head.gc.gc_refs),
              (int)(&n[0].threshold), (int)(&n[0].count), (int)(&n[1])
            );
            printf("*%d,%d,%d*\\n",
              (int)(&generations[0]) ==
              (int)(&generations[0].head.gc.gc_next),
              (int)(&generations[0]) ==
              (int)(&generations[0].head.gc.gc_prev),
              (int)(&generations[0]) ==
              (int)(&generations[1])
            );
            int x1 = (int)(&generations[0]);
            int x2 = (int)(&generations[1]);
            printf("*%d*\\n", x1 == x2);
            for (int i = 0; i < NUM_GENERATIONS; i++) {
              PyGC_Head *list = GEN_HEAD(i);
              printf("%d:%d,%d\\n", i, (int)list == (int)(list->gc.gc_prev), (int)list ==(int)(list->gc.gc_next));
            }
            printf("*%d,%d,%d*\\n", sizeof(PyGC_Head), sizeof(gc_generation), int(GEN_HEAD(2)) - int(GEN_HEAD(1)));
          }
        '''
        if Settings.QUANTUM_SIZE == 1:
          # Compressed memory. Note that sizeof() does give the fat sizes, however!
          self.do_run(src, '*0,0,0,1,2,3,4,5*\n*1,0,0*\n*0*\n0:1,1\n1:1,1\n2:1,1\n*12,20,5*')
        else:
          self.do_run(src, '*0,0,0,4,8,12,16,20*\n*1,0,0*\n*0*\n0:1,1\n1:1,1\n2:1,1\n*12,20,20*')

    def test_ptrtoint(self):
        src = '''
          #include <stdio.h>

          int main( int argc, const char *argv[] ) {
            char *a = new char[10];
            char *a0 = a+0;
            char *a5 = a+5;
            int *b = new int[10];
            int *b0 = b+0;
            int *b5 = b+5;
            int c = (int)b5-(int)b0; // Emscripten should warn!
            int d = (int)b5-(int)b0; // Emscripten should warn!
            printf("*%d*\\n", (int)a5-(int)a0);
            return 0;
          }
          '''
        runner = self
        def check_warnings(output):
            runner.assertEquals(filter(lambda line: 'Warning' in line, output.split('\n')).__len__(), 4)
        self.do_run(src, '*5*', output_processor=check_warnings)

    def test_sizeof(self):
        # Has invalid writes between printouts
        Settings.SAFE_HEAP = 0

        src = '''
          #include <stdio.h>
          #include <string.h>
          #include "emscripten.h"

          struct A { int x, y; };

          int main( int argc, const char *argv[] ) {
            int *a = new int[10];
            int *b = new int[1];
            int *c = new int[10];
            for (int i = 0; i < 10; i++)
              a[i] = 2;
            *b = 5;
            for (int i = 0; i < 10; i++)
              c[i] = 8;
            printf("*%d,%d,%d,%d,%d*\\n", a[0], a[9], *b, c[0], c[9]);
            // Should overwrite a, but not touch b!
            memcpy(a, c, 10*sizeof(int));
            printf("*%d,%d,%d,%d,%d*\\n", a[0], a[9], *b, c[0], c[9]);

            // Part 2
            A as[3] = { { 5, 12 }, { 6, 990 }, { 7, 2 } };
            memcpy(&as[0], &as[2], sizeof(A));

            printf("*%d,%d,%d,%d,%d,%d*\\n", as[0].x, as[0].y, as[1].x, as[1].y, as[2].x, as[2].y);
            return 0;
          }
          '''
        self.do_run(src, '*2,2,5,8,8***8,8,5,8,8***7,2,6,990,7,2*', [], lambda x: x.replace('\n', '*'))

    def test_emscripten_api(self):
        #if Settings.MICRO_OPTS or Settings.RELOOP or Building.LLVM_OPTS: return self.skip('FIXME')

        src = r'''
          #include <stdio.h>
          #include "emscripten.h"

          int main() {
            // EMSCRIPTEN_COMMENT("hello from the source");
            emscripten_run_script("print('hello world' + '!')");
            printf("*%d*\n", emscripten_run_script_int("5*20"));
            return 0;
          }
          '''

        check = '''
def process(filename):
  src = open(filename, 'r').read()
  # TODO: restore this (see comment in emscripten.h) assert '// hello from the source' in src
'''

        self.do_run(src, 'hello world!\n*100*', post_build=check)

    def test_memorygrowth(self):
      # With typed arrays in particular, it is dangerous to use more memory than TOTAL_MEMORY,
      # since we then need to enlarge the heap(s).
      src = r'''
        #include <stdio.h>
        #include <stdlib.h>
        #include <string.h>
        #include <assert.h>
        #include "emscripten.h"

        int main()
        {
          char *buf1 = (char*)malloc(100);
          char *data1 = "hello";
          memcpy(buf1, data1, strlen(data1)+1);

          float *buf2 = (float*)malloc(100);
          float pie = 4.955;
          memcpy(buf2, &pie, sizeof(float));

          printf("*pre: %s,%.3f*\n", buf1, buf2[0]);

          int totalMemory = emscripten_run_script_int("TOTAL_MEMORY");
          char *buf3 = (char*)malloc(totalMemory+1);
          char *buf4 = (char*)malloc(100);
          float *buf5 = (float*)malloc(100);
          //printf("totalMemory: %d bufs: %d,%d,%d,%d,%d\n", totalMemory, buf1, buf2, buf3, buf4, buf5);
          assert((int)buf4 > (int)totalMemory && (int)buf5 > (int)totalMemory);

          printf("*%s,%.3f*\n", buf1, buf2[0]); // the old heap data should still be there

          memcpy(buf4, buf1, strlen(data1)+1);
          memcpy(buf5, buf2, sizeof(float));
          printf("*%s,%.3f*\n", buf4, buf5[0]); // and the new heap space should work too

          return 0;
        }
      '''
      self.do_run(src, '*pre: hello,4.955*\n*hello,4.955*\n*hello,4.955*')

    def test_ssr(self): # struct self-ref
        src = '''
          #include <stdio.h>

          // see related things in openjpeg
          typedef struct opj_mqc_state {
	          unsigned int qeval;
	          int mps;
	          struct opj_mqc_state *nmps;
	          struct opj_mqc_state *nlps;
          } opj_mqc_state_t;

          static opj_mqc_state_t mqc_states[2] = {
	          {0x5600, 0, &mqc_states[2], &mqc_states[3]},
	          {0x5602, 1, &mqc_states[3], &mqc_states[2]},
          };

          int main() {
            printf("*%d*\\n", (int)(mqc_states+1)-(int)mqc_states);
            for (int i = 0; i < 2; i++)
              printf("%d:%d,%d,%d,%d\\n", i, mqc_states[i].qeval, mqc_states[i].mps,
                     (int)mqc_states[i].nmps-(int)mqc_states, (int)mqc_states[i].nlps-(int)mqc_states);
            return 0;
          }
          '''
        if Settings.QUANTUM_SIZE == 1:
          self.do_run(src, '''*4*\n0:22016,0,8,12\n1:22018,1,12,8\n''')
        else:
          self.do_run(src, '''*16*\n0:22016,0,32,48\n1:22018,1,48,32\n''')

    def test_tinyfuncstr(self):
        src = '''
          #include <stdio.h>

          struct Class {
            static char *name1() { return "nameA"; }
                   char *name2() { return "nameB"; }
          };

          int main() {
            printf("*%s,%s*\\n", Class::name1(), (new Class())->name2());
            return 0;
          }
          '''
        self.do_run(src, '*nameA,nameB*')

    def test_llvmswitch(self):
        src = '''
          #include <stdio.h>
          #include <string.h>

          int switcher(int p)
          {
            switch(p) {
              case 'a':
              case 'b':
              case 'c':
                  return p-1;
              case 'd':
                  return p+1;
            }
            return p;
          }

          int main( int argc, const char *argv[] ) {
            printf("*%d,%d,%d,%d,%d*\\n", switcher('a'), switcher('b'), switcher('c'), switcher('d'), switcher('e'));
            return 0;
          }
          '''
        self.do_run(src, '*96,97,98,101,101*')

    def test_indirectbr(self):
        if Settings.USE_TYPED_ARRAYS == 2:
          Settings.I64_MODE = 1 # Unsafe optimizations use 64-bit load/store on two i32s

        src = '''
          #include <stdio.h>
          int main(void) {
            const void *addrs[2] = { &&FOO, &&BAR };

            // confuse the optimizer so it doesn't hardcode the jump and avoid generating an |indirectbr| instruction
            int which = 0;
            for (int x = 0; x < 1000; x++) which = (which + x*x) % 7;
            which = (which % 2) + 1;

            goto *addrs[which];

          FOO:
            printf("bad\\n");
            return 1;
          BAR:
            printf("good\\n");
            const void *addr = &&FOO;
            goto *addr;
          }
          '''
        self.do_run(src, 'good\nbad')

    def test_pack(self):
        src = '''
          #include <stdio.h>
          #include <string.h>

          #pragma pack(push,1)
          typedef struct header
          {                           
              unsigned char  id;
              unsigned short colour;
              unsigned char  desc;
          } header;
          #pragma pack(pop)

          typedef struct fatheader
          {                           
              unsigned char  id;
              unsigned short colour;
              unsigned char  desc;
          } fatheader;

          int main( int argc, const char *argv[] ) {
            header h, *ph = 0;
            fatheader fh, *pfh = 0;
            printf("*%d,%d,%d*\\n", sizeof(header), (int)((int)&h.desc - (int)&h.id), (int)(&ph[1])-(int)(&ph[0]));
            printf("*%d,%d,%d*\\n", sizeof(fatheader), (int)((int)&fh.desc - (int)&fh.id), (int)(&pfh[1])-(int)(&pfh[0]));
            return 0;
          }
          '''
        if Settings.QUANTUM_SIZE == 1:
          self.do_run(src, '*4,2,3*\n*6,2,3*')
        else:
          self.do_run(src, '*4,3,4*\n*6,4,6*')

    def test_varargs(self):
        if Settings.QUANTUM_SIZE == 1: return self.skip('FIXME: Add support for this')

        src = '''
          #include <stdio.h>
          #include <stdarg.h>

          void vary(const char *s, ...)
          {
            va_list v;
            va_start(v, s);
            char d[20];
            vsnprintf(d, 20, s, v);
            puts(d);

            // Try it with copying
            va_list tempva;
            __va_copy(tempva, v);
            vsnprintf(d, 20, s, tempva);
            puts(d);

            va_end(v);
          }

          void vary2(char color, const char *s, ...)
          {
            va_list v;
            va_start(v, s);
            char d[21];
            d[0] = color;
            vsnprintf(d+1, 20, s, v);
            puts(d);
            va_end(v);
          }

          #define GETMAX(pref, type) \
            type getMax##pref(int num, ...) \
            { \
              va_list vv; \
              va_start(vv, num); \
              type maxx = va_arg(vv, type); \
              for (int i = 1; i < num; i++) \
              { \
                type curr = va_arg(vv, type); \
                maxx = curr > maxx ? curr : maxx; \
              } \
              va_end(vv); \
              return maxx; \
            }
          GETMAX(i, int);
          GETMAX(D, double);

          int main() {
            vary("*cheez: %d+%d*", 0, 24); // Also tests that '0' is not special as an array ender
            vary("*albeit*"); // Should not fail with no var args in vararg function
            vary2('Q', "%d*", 85);

            int maxxi = getMaxi(6,        2, 5, 21, 4, -10, 19);
            printf("maxxi:%d*\\n", maxxi);
            double maxxD = getMaxD(6,        (double)2.1, (double)5.1, (double)22.1, (double)4.1, (double)-10.1, (double)19.1);
            printf("maxxD:%.2f*\\n", (float)maxxD);

            // And, as a function pointer
            void (*vfp)(const char *s, ...) = vary;
            vfp("*vfp:%d,%d*", 22, 199);

            return 0;
          }
          '''
        self.do_run(src, '*cheez: 0+24*\n*cheez: 0+24*\n*albeit*\n*albeit*\nQ85*\nmaxxi:21*\nmaxxD:22.10*\n*vfp:22,199*\n*vfp:22,199*\n')

    def test_structbyval(self):
        # part 1: make sure that normally, passing structs by value works

        src = r'''
          #include <stdio.h>

          struct point
          {
            int x, y;
          };

          void dump(struct point p) {
            p.x++; // should not modify
            p.y++; // anything in the caller!
            printf("dump: %d,%d\n", p.x, p.y);
          }

          void dumpmod(struct point *p) {
            p->x++; // should not modify
            p->y++; // anything in the caller!
            printf("dump: %d,%d\n", p->x, p->y);
          }

          int main( int argc, const char *argv[] ) {
            point p = { 54, 2 };
            printf("pre:  %d,%d\n", p.x, p.y);
            dump(p);
            void (*dp)(point p) = dump; // And, as a function pointer
            dp(p);
            printf("post: %d,%d\n", p.x, p.y);
            dumpmod(&p);
            dumpmod(&p);
            printf("last: %d,%d\n", p.x, p.y);
            return 0;
          }
        '''
        self.do_run(src, 'pre:  54,2\ndump: 55,3\ndump: 55,3\npost: 54,2\ndump: 55,3\ndump: 56,4\nlast: 56,4')

        # Check for lack of warning in the generated code (they should appear in part 2)
        generated = open(os.path.join(self.get_dir(), 'src.cpp.o.js')).read()
        assert 'Casting a function pointer type to another with a different number of arguments.' not in generated, 'Unexpected warning'

        # part 2: make sure we warn about mixing c and c++ calling conventions here

        header = r'''
          struct point
          {
            int x, y;
          };

        '''
        open(os.path.join(self.get_dir(), 'header.h'), 'w').write(header)

        supp = r'''
          #include <stdio.h>
          #include "header.h"

          void dump(struct point p) {
            p.x++; // should not modify
            p.y++; // anything in the caller!
            printf("dump: %d,%d\n", p.x, p.y);
          }
        '''
        supp_name = os.path.join(self.get_dir(), 'supp.c')
        open(supp_name, 'w').write(supp)

        main = r'''
          #include <stdio.h>
          #include "header.h"

          #ifdef __cplusplus
          extern "C" {
          #endif
            void dump(struct point p);
          #ifdef __cplusplus
          }
          #endif

          int main( int argc, const char *argv[] ) {
            struct point p = { 54, 2 };
            printf("pre:  %d,%d\n", p.x, p.y);
            dump(p);
            void (*dp)(struct point p) = dump; // And, as a function pointer
            dp(p);
            printf("post: %d,%d\n", p.x, p.y);
            return 0;
          }
        '''
        main_name = os.path.join(self.get_dir(), 'main.cpp')
        open(main_name, 'w').write(main)

        Building.emcc(supp_name)
        Building.emcc(main_name)
        all_name = os.path.join(self.get_dir(), 'all.bc')
        Building.link([supp_name + '.o', main_name + '.o'], all_name)

        try:
          # This will fail! See explanation near the warning we check for, in the compiler source code
          self.do_ll_run(all_name, 'pre:  54,2\ndump: 55,3\ndump: 55,3\npost: 54,2')
        except Exception, e:
          # Check for warning in the generated code
          generated = open(os.path.join(self.get_dir(), 'src.cpp.o.js')).read()
          if self.emcc_args is None or self.emcc_args == []: # Optimized code is missing the warning comments
            assert 'Casting a function pointer type to another with a different number of arguments.' in generated, 'Missing expected warning'
            assert 'void (i32, i32)* ==> void (%struct.point.0*)*' in generated, 'Missing expected warning details'
          return
        raise Exception('We should not have gotten to here!')

    def test_stdlibs(self):
        if Settings.USE_TYPED_ARRAYS == 2:
            # Typed arrays = 2 + safe heap prints a warning that messes up our output.
            Settings.SAFE_HEAP = 0
        src = '''
          #include <stdio.h>
          #include <stdlib.h>
          #include <sys/time.h>

          void clean()
          {
            printf("*cleaned*\\n");
          }

          int comparer(const void *a, const void *b) {
            int aa = *((int*)a);
            int bb = *((int*)b);
            return aa - bb;
          }

          int main() {
            // timeofday
            timeval t;
            gettimeofday(&t, NULL);
            printf("*%d,%d\\n", int(t.tv_sec), int(t.tv_usec)); // should not crash

            // atexit
            atexit(clean);

            // qsort
            int values[6] = { 3, 2, 5, 1, 5, 6 };
            qsort(values, 5, sizeof(int), comparer);
            printf("*%d,%d,%d,%d,%d,%d*\\n", values[0], values[1], values[2], values[3], values[4], values[5]);

            printf("*stdin==0:%d*\\n", stdin == 0); // check that external values are at least not NULL
            printf("*%%*\\n");
            printf("*%.1ld*\\n", 5);

            printf("*%.1f*\\n", strtod("66", NULL)); // checks dependency system, as our strtod needs _isspace etc.

            printf("*%ld*\\n", strtol("10", NULL, 0));
            printf("*%ld*\\n", strtol("0", NULL, 0));
            printf("*%ld*\\n", strtol("-10", NULL, 0));
            printf("*%ld*\\n", strtol("12", NULL, 16));

            printf("*%lu*\\n", strtoul("10", NULL, 0));
            printf("*%lu*\\n", strtoul("0", NULL, 0));
            printf("*%lu*\\n", strtoul("-10", NULL, 0));

            printf("*malloc(0)!=0:%d*\\n", malloc(0) != 0); // We should not fail horribly

            return 0;
          }
          '''

        self.do_run(src, '*1,2,3,5,5,6*\n*stdin==0:0*\n*%*\n*5*\n*66.0*\n*10*\n*0*\n*-10*\n*18*\n*10*\n*0*\n*4294967286*\n*malloc(0)!=0:1*\n*cleaned*')

        src = r'''
          #include <stdio.h>
          #include <stdbool.h>

          int main() {
            bool x = true;
            bool y = false;
            printf("*%d*\n", x != y);
            return 0;
          }
        '''

        self.do_run(src, '*1*', force_c=True)

    def test_time(self):
      # XXX Not sure what the right output is here. Looks like the test started failing with daylight savings changes. Modified it to pass again.
      src = open(path_from_root('tests', 'time', 'src.c'), 'r').read()
      expected = open(path_from_root('tests', 'time', 'output.txt'), 'r').read()
      self.do_run(src, expected,
                   extra_emscripten_args=['-H', 'libc/time.h'])
                   #extra_emscripten_args=['-H', 'libc/fcntl.h,libc/sys/unistd.h,poll.h,libc/math.h,libc/langinfo.h,libc/time.h'])

    def test_statics(self):
        # static initializers save i16 but load i8 for some reason
        if Settings.SAFE_HEAP:
          Settings.SAFE_HEAP = 3
          Settings.SAFE_HEAP_LINES = ['src.cpp:19', 'src.cpp:26']

        src = '''
          #include <stdio.h>
          #include <string.h>

          #define CONSTRLEN 32

          void conoutfv(const char *fmt)
          {
              static char buf[CONSTRLEN];
              strcpy(buf, fmt);
              puts(buf);
          }

          struct XYZ {
            float x, y, z;
            XYZ(float a, float b, float c) : x(a), y(b), z(c) { }
            static const XYZ& getIdentity()
            {
              static XYZ iT(1,2,3);
              return iT;
            }
          };
          struct S {
            static const XYZ& getIdentity()
            {
              static const XYZ iT(XYZ::getIdentity());
              return iT;
            }
          };

          int main() {
            conoutfv("*staticccz*");
            printf("*%.2f,%.2f,%.2f*\\n", S::getIdentity().x, S::getIdentity().y, S::getIdentity().z);
            return 0;
          }
          '''
        self.do_run(src, '*staticccz*\n*1.00,2.00,3.00*')

    def test_copyop(self):
        # clang generated code is vulnerable to this, as it uses
        # memcpy for assignments, with hardcoded numbers of bytes
        # (llvm-gcc copies items one by one). See QUANTUM_SIZE in
        # settings.js.
        src = '''
          #include <stdio.h>
          #include <math.h>
          #include <string.h>

          struct vec {
            double x,y,z;
            vec() : x(0), y(0), z(0) { };
            vec(const double a, const double b, const double c) : x(a), y(b), z(c) { };
          };

          struct basis {
            vec a, b, c;
            basis(const vec& v) {
              a=v; // should not touch b!
              printf("*%.2f,%.2f,%.2f*\\n", b.x, b.y, b.z);
            }
          };

          int main() {
            basis B(vec(1,0,0));

            // Part 2: similar problem with memset and memmove
            int x = 1, y = 77, z = 2;
            memset((void*)&x, 0, sizeof(int));
            memset((void*)&z, 0, sizeof(int));
            printf("*%d,%d,%d*\\n", x, y, z);
            memcpy((void*)&x, (void*)&z, sizeof(int));
            memcpy((void*)&z, (void*)&x, sizeof(int));
            printf("*%d,%d,%d*\\n", x, y, z);
            memmove((void*)&x, (void*)&z, sizeof(int));
            memmove((void*)&z, (void*)&x, sizeof(int));
            printf("*%d,%d,%d*\\n", x, y, z);
            return 0;
          }
          '''
        self.do_run(src, '*0.00,0.00,0.00*\n*0,77,0*\n*0,77,0*\n*0,77,0*')

    def test_memcpy(self):
        src = '''
          #include <stdio.h>
          #include <string.h>
          #define MAXX 48
          void reset(unsigned char *buffer) {
            for (int i = 0; i < MAXX; i++) buffer[i] = i+1;
          }
          void dump(unsigned char *buffer) {
            for (int i = 0; i < MAXX-1; i++) printf("%2d,", buffer[i]);
            printf("%d\\n", buffer[MAXX-1]);
          }
          int main() {
            unsigned char buffer[MAXX];
            for (int i = MAXX/4; i < MAXX-MAXX/4; i++) {
              for (int j = MAXX/4; j < MAXX-MAXX/4; j++) {
                for (int k = 1; k < MAXX/4; k++) {
                  if (i == j) continue;
                  if (i < j && i+k > j) continue;
                  if (j < i && j+k > i) continue;
                  printf("[%d,%d,%d] ", i, j, k);
                  reset(buffer);
                  memcpy(buffer+i, buffer+j, k);
                  dump(buffer);
                }
              }
            }
            return 0;
          }
          '''
        self.do_run(src)

    def test_bsearch(self):
      if Settings.QUANTUM_SIZE == 1: return self.skip('Test cannot work with q1')

      src = '''
          #include <stdlib.h>
          #include <stdio.h>

          int cmp(const void* key, const void* member) {
            return *(int *)key - *(int *)member;
          }

          void printResult(int* needle, int* haystack, unsigned int len) {
            void *result = bsearch(needle, haystack, len, sizeof(unsigned int), cmp);

            if (result == NULL) {
              printf("null\\n");
            } else {
              printf("%d\\n", *(unsigned int *)result);
            }
          }

          int main() {
            int a[] = { -2, -1, 0, 6, 7, 9 };
            int b[] = { 0, 1 };

            /* Find all keys that exist. */
            for(int i = 0; i < 6; i++) {
              int val = a[i];

              printResult(&val, a, 6);
            }

            /* Keys that are covered by the range of the array but aren't in
             * the array cannot be found.
             */
            int v1 = 3;
            int v2 = 8;
            printResult(&v1, a, 6);
            printResult(&v2, a, 6);

            /* Keys outside the range of the array cannot be found. */
            int v3 = -1;
            int v4 = 2;

            printResult(&v3, b, 2);
            printResult(&v4, b, 2);

            return 0;
          }
          '''

      self.do_run(src, '-2\n-1\n0\n6\n7\n9\nnull\nnull\nnull\nnull')

    def test_nestedstructs(self):
        src = '''
          #include <stdio.h>
          #include "emscripten.h"

          struct base {
            int x;
            float y;
            union {
              int a;
              float b;
            };
            char c;
          };

          struct hashtableentry {
            int key;
            base data;
          };

          struct hashset {
            typedef hashtableentry entry;
            struct chain { entry elem; chain *next; };
          //  struct chainchunk { chain chains[100]; chainchunk *next; };
          };

          struct hashtable : hashset {
            hashtable() {
              base *b = NULL;
              entry *e = NULL;
              chain *c = NULL;
              printf("*%d,%d,%d,%d,%d,%d|%d,%d,%d,%d,%d,%d,%d,%d|%d,%d,%d,%d,%d,%d,%d,%d,%d,%d*\\n",
                sizeof(base),
                int(&(b->x)), int(&(b->y)), int(&(b->a)), int(&(b->b)), int(&(b->c)), 
                sizeof(hashtableentry),
                int(&(e->key)), int(&(e->data)), int(&(e->data.x)), int(&(e->data.y)), int(&(e->data.a)), int(&(e->data.b)), int(&(e->data.c)), 
                sizeof(hashset::chain),
                int(&(c->elem)), int(&(c->next)), int(&(c->elem.key)), int(&(c->elem.data)), int(&(c->elem.data.x)), int(&(c->elem.data.y)), int(&(c->elem.data.a)), int(&(c->elem.data.b)), int(&(c->elem.data.c))
              );
            }
          };

          struct B { char buffer[62]; int last; char laster; char laster2; };

          struct Bits {
            unsigned short A : 1;
            unsigned short B : 1;
            unsigned short C : 1;
            unsigned short D : 1;
            unsigned short x1 : 1;
            unsigned short x2 : 1;
            unsigned short x3 : 1;
            unsigned short x4 : 1;
          };

          int main() {
            hashtable t;

            // Part 2 - the char[] should be compressed, BUT have a padding space at the end so the next
            // one is aligned properly. Also handle char; char; etc. properly.
            B *b = NULL;
            printf("*%d,%d,%d,%d,%d,%d,%d,%d,%d*\\n", int(b), int(&(b->buffer)), int(&(b->buffer[0])), int(&(b->buffer[1])), int(&(b->buffer[2])),
                                                      int(&(b->last)), int(&(b->laster)), int(&(b->laster2)), sizeof(B));

            // Part 3 - bitfields, and small structures
            Bits *b2 = NULL;
            printf("*%d*\\n", sizeof(Bits));

            return 0;
          }
          '''
        if Settings.QUANTUM_SIZE == 1:
          # Compressed memory. Note that sizeof() does give the fat sizes, however!
          self.do_run(src, '*16,0,1,2,2,3|20,0,1,1,2,3,3,4|24,0,5,0,1,1,2,3,3,4*\n*0,0,0,1,2,62,63,64,72*\n*2*')
        else:
          # Bloated memory; same layout as C/C++
          self.do_run(src, '*16,0,4,8,8,12|20,0,4,4,8,12,12,16|24,0,20,0,4,4,8,12,12,16*\n*0,0,0,1,2,64,68,69,72*\n*2*')

    def test_runtimelink(self):
      if Building.LLVM_OPTS: return self.skip('LLVM opts will optimize printf into puts in the parent, and the child will still look for puts')
      self.banned_js_engines = [NODE_JS] # node's global scope behaves differently than everything else, needs investigation FIXME

      header = r'''
        struct point
        {
          int x, y;
        };

      '''
      open(os.path.join(self.get_dir(), 'header.h'), 'w').write(header)

      supp = r'''
        #include <stdio.h>
        #include "header.h"

        extern void mainFunc(int x);
        extern int mainInt;

        void suppFunc(struct point &p) {
          printf("supp: %d,%d\n", p.x, p.y);
          mainFunc(p.x+p.y);
          printf("supp see: %d\n", mainInt);
        }

        int suppInt = 76;
      '''
      supp_name = os.path.join(self.get_dir(), 'supp.c')
      open(supp_name, 'w').write(supp)

      main = r'''
        #include <stdio.h>
        #include "header.h"

        extern void suppFunc(struct point &p);
        extern int suppInt;

        void mainFunc(int x) {
          printf("main: %d\n", x);
        }

        int mainInt = 543;

        int main( int argc, const char *argv[] ) {
          struct point p = { 54, 2 };
          suppFunc(p);
          printf("main see: %d\nok.\n", suppInt);
          return 0;
        }
      '''

      Settings.BUILD_AS_SHARED_LIB = 2
      dirname = self.get_dir()
      self.build(supp, dirname, supp_name)
      shutil.move(supp_name + '.o.js', os.path.join(dirname, 'liblib.so'))
      Settings.BUILD_AS_SHARED_LIB = 0

      Settings.RUNTIME_LINKED_LIBS = ['liblib.so'];
      self.do_run(main, 'supp: 54,2\nmain: 56\nsupp see: 543\nmain see: 76\nok.')

    def test_dlfcn_basic(self):
      lib_src = '''
        #include <cstdio>

        class Foo {
        public:
          Foo() {
            printf("Constructing lib object.\\n");
          }
        };

        Foo global;
        '''
      dirname = self.get_dir()
      filename = os.path.join(dirname, 'liblib.cpp')
      Settings.BUILD_AS_SHARED_LIB = 1
      self.build(lib_src, dirname, filename)
      shutil.move(filename + '.o.js', os.path.join(dirname, 'liblib.so'))

      src = '''
        #include <cstdio>
        #include <dlfcn.h>

        class Bar {
        public:
          Bar() {
            printf("Constructing main object.\\n");
          }
        };

        Bar global;

        int main() {
          dlopen("liblib.so", RTLD_NOW);
          return 0;
        }
        '''
      Settings.BUILD_AS_SHARED_LIB = 0
      add_pre_run_and_checks = '''
def process(filename):
  src = open(filename, 'r').read().replace(
    '// {{PRE_RUN_ADDITIONS}}',
    "FS.createLazyFile('/', 'liblib.so', 'liblib.so', true, false);"
  )
  open(filename, 'w').write(src)
'''
      self.do_run(src, 'Constructing main object.\nConstructing lib object.\n',
                  post_build=add_pre_run_and_checks)

    def test_dlfcn_qsort(self):
      if Settings.USE_TYPED_ARRAYS == 2:
        Settings.CORRECT_SIGNS = 1 # Needed for unsafe optimizations

      lib_src = '''
        int lib_cmp(const void* left, const void* right) {
          const int* a = (const int*) left;
          const int* b = (const int*) right;
          if(*a > *b) return 1;
          else if(*a == *b) return  0;
          else return -1;
        }

        typedef int (*CMP_TYPE)(const void*, const void*);

        extern "C" CMP_TYPE get_cmp() {
          return lib_cmp;
        }
        '''
      dirname = self.get_dir()
      filename = os.path.join(dirname, 'liblib.cpp')
      Settings.BUILD_AS_SHARED_LIB = 1
      Settings.EXPORTED_FUNCTIONS = ['_get_cmp']
      self.build(lib_src, dirname, filename)
      shutil.move(filename + '.o.js', os.path.join(dirname, 'liblib.so'))

      src = '''
        #include <stdio.h>
        #include <stdlib.h>
        #include <dlfcn.h>

        typedef int (*CMP_TYPE)(const void*, const void*);

        int main_cmp(const void* left, const void* right) {
          const int* a = (const int*) left;
          const int* b = (const int*) right;
          if(*a < *b) return 1;
          else if(*a == *b) return  0;
          else return -1;
        }

        int main() {
          void* lib_handle;
          CMP_TYPE (*getter_ptr)();
          CMP_TYPE lib_cmp_ptr;
          int arr[5] = {4, 2, 5, 1, 3};

          lib_handle = dlopen("liblib.so", RTLD_NOW);
          if (lib_handle == NULL) {
            printf("Could not load lib.\\n");
            return 1;
          }
          getter_ptr = (CMP_TYPE (*)()) dlsym(lib_handle, "get_cmp");
          if (getter_ptr == NULL) {
            printf("Could not find func.\\n");
            return 1;
          }
          lib_cmp_ptr = getter_ptr();

          qsort((void*)arr, 5, sizeof(int), main_cmp);
          printf("Sort with main comparison: ");
          for (int i = 0; i < 5; i++) {
            printf("%d ", arr[i]);
          }
          printf("\\n");

          qsort((void*)arr, 5, sizeof(int), lib_cmp_ptr);
          printf("Sort with lib comparison: ");
          for (int i = 0; i < 5; i++) {
            printf("%d ", arr[i]);
          }
          printf("\\n");

          return 0;
        }
        '''
      Settings.BUILD_AS_SHARED_LIB = 0
      Settings.EXPORTED_FUNCTIONS = ['_main']
      add_pre_run_and_checks = '''
def process(filename):
  src = open(filename, 'r').read().replace(
    '// {{PRE_RUN_ADDITIONS}}',
    "FS.createLazyFile('/', 'liblib.so', 'liblib.so', true, false);"
  )
  open(filename, 'w').write(src)
'''
      self.do_run(src, 'Sort with main comparison: 5 4 3 2 1 *Sort with lib comparison: 1 2 3 4 5 *',
                  output_nicerizer=lambda x: x.replace('\n', '*'),
                  post_build=add_pre_run_and_checks)

    def test_dlfcn_data_and_fptr(self):
      if Building.LLVM_OPTS: return self.skip('LLVM opts will optimize out parent_func')

      lib_src = '''
        #include <stdio.h>

        int global = 42;

        extern void parent_func(); // a function that is defined in the parent

        void lib_fptr() {
          printf("Second calling lib_fptr from main.\\n");
          parent_func();
          // call it also through a pointer, to check indexizing
          void (*p_f)();
          p_f = parent_func;
          p_f();
        }

        extern "C" void (*func(int x, void(*fptr)()))() {
          printf("In func: %d\\n", x);
          fptr();
          return lib_fptr;
        }
        '''
      dirname = self.get_dir()
      filename = os.path.join(dirname, 'liblib.cpp')
      Settings.BUILD_AS_SHARED_LIB = 1
      Settings.EXPORTED_FUNCTIONS = ['_func']
      Settings.EXPORTED_GLOBALS = ['_global']
      self.build(lib_src, dirname, filename)
      shutil.move(filename + '.o.js', os.path.join(dirname, 'liblib.so'))

      src = '''
        #include <stdio.h>
        #include <dlfcn.h>

        typedef void (*FUNCTYPE(int, void(*)()))();

        FUNCTYPE func;

        void parent_func() {
          printf("parent_func called from child\\n");
        }

        void main_fptr() {
          printf("First calling main_fptr from lib.\\n");
        }

        int main() {
          void* lib_handle;
          FUNCTYPE* func_fptr;

          // Test basic lib loading.
          lib_handle = dlopen("liblib.so", RTLD_NOW);
          if (lib_handle == NULL) {
            printf("Could not load lib.\\n");
            return 1;
          }

          // Test looked up function.
          func_fptr = (FUNCTYPE*) dlsym(lib_handle, "func");
          // Load twice to test cache.
          func_fptr = (FUNCTYPE*) dlsym(lib_handle, "func");
          if (func_fptr == NULL) {
            printf("Could not find func.\\n");
            return 1;
          }

          // Test passing function pointers across module bounds.
          void (*fptr)() = func_fptr(13, main_fptr);
          fptr();

          // Test global data.
          int* global = (int*) dlsym(lib_handle, "global");
          if (global == NULL) {
            printf("Could not find global.\\n");
            return 1;
          }

          printf("Var: %d\\n", *global);

          return 0;
        }
        '''
      Settings.BUILD_AS_SHARED_LIB = 0
      Settings.EXPORTED_FUNCTIONS = ['_main']
      Settings.EXPORTED_GLOBALS = []
      add_pre_run_and_checks = '''
def process(filename):
  src = open(filename, 'r').read().replace(
    '// {{PRE_RUN_ADDITIONS}}',
    "FS.createLazyFile('/', 'liblib.so', 'liblib.so', true, false);"
  )
  open(filename, 'w').write(src)
'''
      self.do_run(src, 'In func: 13*First calling main_fptr from lib.*Second calling lib_fptr from main.*parent_func called from child*parent_func called from child*Var: 42*',
                   output_nicerizer=lambda x: x.replace('\n', '*'),
                   post_build=add_pre_run_and_checks)

    def test_dlfcn_alias(self):
      if Building.LLVM_OPTS == 2: return self.skip('LLVM LTO will optimize away stuff we expect from the shared library')

      lib_src = r'''
        #include <stdio.h>
        extern int parent_global;
        extern "C" void func() {
          printf("Parent global: %d.\n", parent_global);
        }
        '''
      dirname = self.get_dir()
      filename = os.path.join(dirname, 'liblib.cpp')
      Settings.BUILD_AS_SHARED_LIB = 1
      Settings.EXPORTED_FUNCTIONS = ['_func']
      self.build(lib_src, dirname, filename)
      shutil.move(filename + '.o.js', os.path.join(dirname, 'liblib.so'))

      src = r'''
        #include <dlfcn.h>

        int parent_global = 123;

        int main() {
          void* lib_handle;
          void (*fptr)();

          lib_handle = dlopen("liblib.so", RTLD_NOW);
          fptr = (void (*)())dlsym(lib_handle, "func");
          fptr();
          parent_global = 456;
          fptr();

          return 0;
        }
        '''
      Settings.BUILD_AS_SHARED_LIB = 0
      Settings.INCLUDE_FULL_LIBRARY = 1
      Settings.EXPORTED_FUNCTIONS = ['_main']
      add_pre_run_and_checks = '''
def process(filename):
  src = open(filename, 'r').read().replace(
    '// {{PRE_RUN_ADDITIONS}}',
    "FS.createLazyFile('/', 'liblib.so', 'liblib.so', true, false);"
  )
  open(filename, 'w').write(src)
'''
      self.do_run(src, 'Parent global: 123.*Parent global: 456.*',
                  output_nicerizer=lambda x: x.replace('\n', '*'),
                  post_build=add_pre_run_and_checks,
                  extra_emscripten_args=['-H', 'libc/fcntl.h,libc/sys/unistd.h,poll.h,libc/math.h,libc/time.h,libc/langinfo.h'])
      Settings.INCLUDE_FULL_LIBRARY = 0

    def test_dlfcn_varargs(self):
      if Building.LLVM_OPTS == 2: return self.skip('LLVM LTO will optimize things that prevent shared objects from working')
      if Settings.QUANTUM_SIZE == 1: return self.skip('FIXME: Add support for this')

      lib_src = r'''
        void print_ints(int n, ...);
        extern "C" void func() {
          print_ints(2, 13, 42);
        }
        '''
      dirname = self.get_dir()
      filename = os.path.join(dirname, 'liblib.cpp')
      Settings.BUILD_AS_SHARED_LIB = 1
      Settings.EXPORTED_FUNCTIONS = ['_func']
      self.build(lib_src, dirname, filename)
      shutil.move(filename + '.o.js', os.path.join(dirname, 'liblib.so'))

      src = r'''
        #include <stdarg.h>
        #include <stdio.h>
        #include <dlfcn.h>

        void print_ints(int n, ...) {
          va_list args;
          va_start(args, n);
          for (int i = 0; i < n; i++) {
            printf("%d\n", va_arg(args, int));
          }
          va_end(args);
        }

        int main() {
          void* lib_handle;
          void (*fptr)();

          print_ints(2, 100, 200);

          lib_handle = dlopen("liblib.so", RTLD_NOW);
          fptr = (void (*)())dlsym(lib_handle, "func");
          fptr();

          return 0;
        }
        '''
      Settings.BUILD_AS_SHARED_LIB = 0
      Settings.EXPORTED_FUNCTIONS = ['_main']
      add_pre_run_and_checks = '''
def process(filename):
  src = open(filename, 'r').read().replace(
    '// {{PRE_RUN_ADDITIONS}}',
    "FS.createLazyFile('/', 'liblib.so', 'liblib.so', true, false);"
  )
  open(filename, 'w').write(src)
'''
      self.do_run(src, '100\n200\n13\n42\n',
                  post_build=add_pre_run_and_checks)

    def test_rand(self):
      src = r'''
        #include <stdio.h>
        #include <stdlib.h>

        int main() {
          printf("%d\n", rand());
          printf("%d\n", rand());

          srand(123);
          printf("%d\n", rand());
          printf("%d\n", rand());
          srand(123);
          printf("%d\n", rand());
          printf("%d\n", rand());

          unsigned state = 0;
          int r;
          r = rand_r(&state);
          printf("%d, %u\n", r, state);
          r = rand_r(&state);
          printf("%d, %u\n", r, state);
          state = 0;
          r = rand_r(&state);
          printf("%d, %u\n", r, state);

          return 0;
        }
        '''
      expected = '''
        1250496027
        1116302336
        440917656
        1476150784
        440917656
        1476150784
        12345, 12345
        1406932606, 3554416254
        12345, 12345
        '''
      self.do_run(src, re.sub(r'(^|\n)\s+', r'\1', expected))

    def test_strtod(self):
      src = r'''
        #include <stdio.h>
        #include <stdlib.h>

        int main() {
          char* endptr;

          printf("\n");
          printf("%g\n", strtod("0", &endptr));
          printf("%g\n", strtod("0.", &endptr));
          printf("%g\n", strtod("0.0", &endptr));
          printf("%g\n", strtod("1", &endptr));
          printf("%g\n", strtod("1.", &endptr));
          printf("%g\n", strtod("1.0", &endptr));
          printf("%g\n", strtod("123", &endptr));
          printf("%g\n", strtod("123.456", &endptr));
          printf("%g\n", strtod("-123.456", &endptr));
          printf("%g\n", strtod("1234567891234567890", &endptr));
          printf("%g\n", strtod("1234567891234567890e+50", &endptr));
          printf("%g\n", strtod("84e+220", &endptr));
          printf("%g\n", strtod("123e-50", &endptr));
          printf("%g\n", strtod("123e-250", &endptr));
          printf("%g\n", strtod("123e-450", &endptr));

          char str[] = "  12.34e56end";
          printf("%g\n", strtod(str, &endptr));
          printf("%d\n", endptr - str);
          printf("%g\n", strtod("84e+420", &endptr));
          return 0;
        }
        '''
      expected = '''
        0
        0
        0
        1
        1
        1
        123
        123.456
        -123.456
        1.23457e+18
        1.23457e+68
        8.4e+221
        1.23e-48
        1.23e-248
        0
        1.234e+57
        10
        inf
        '''

      self.do_run(src, re.sub(r'\n\s+', '\n', expected))

    def test_strtok(self):
      src = r'''
        #include<stdio.h>
        #include<string.h>

        int main() {
          char test[80], blah[80];
          char *sep = "\\/:;=-";
          char *word, *phrase, *brkt, *brkb;

          strcpy(test, "This;is.a:test:of=the/string\\tokenizer-function.");

          for (word = strtok_r(test, sep, &brkt); word; word = strtok_r(NULL, sep, &brkt)) {
            strcpy(blah, "blah:blat:blab:blag");
            for (phrase = strtok_r(blah, sep, &brkb); phrase; phrase = strtok_r(NULL, sep, &brkb)) {
              printf("at %s:%s\n", word, phrase);
            }
          }
          return 1;
        }
      '''

      expected = '''at This:blah
at This:blat
at This:blab
at This:blag
at is.a:blah
at is.a:blat
at is.a:blab
at is.a:blag
at test:blah
at test:blat
at test:blab
at test:blag
at of:blah
at of:blat
at of:blab
at of:blag
at the:blah
at the:blat
at the:blab
at the:blag
at string:blah
at string:blat
at string:blab
at string:blag
at tokenizer:blah
at tokenizer:blat
at tokenizer:blab
at tokenizer:blag
at function.:blah
at function.:blat
at function.:blab
at function.:blag
'''
      self.do_run(src, expected)

    def test_parseInt(self):
      if Settings.QUANTUM_SIZE == 1: return self.skip('Q1 and I64_1 do not mix well yet')
      Settings.I64_MODE = 1 # Necessary to prevent i64s being truncated into i32s, but we do still get doubling
                            # FIXME: The output here is wrong, due to double rounding of i64s!
      src = open(path_from_root('tests', 'parseInt', 'src.c'), 'r').read()
      expected = open(path_from_root('tests', 'parseInt', 'output.txt'), 'r').read()
      self.do_run(src, expected)

    def test_printf(self):
      if Settings.QUANTUM_SIZE == 1: return self.skip('Q1 and I64_1 do not mix well yet')
      Settings.I64_MODE = 1
      self.banned_js_engines = [NODE_JS, V8_ENGINE] # SpiderMonkey and V8 do different things to float64 typed arrays, un-NaNing, etc.
      src = open(path_from_root('tests', 'printf', 'test.c'), 'r').read()
      expected = [open(path_from_root('tests', 'printf', 'output.txt'), 'r').read(),
                  open(path_from_root('tests', 'printf', 'output_i64_1.txt'), 'r').read()]
      self.do_run(src, expected)

    def test_printf_types(self):
      src = r'''
        #include <stdio.h>

        int main() {
          char c = '1';
          short s = 2;
          int i = 3;
          long long l = 4;
          float f = 5.5;
          double d = 6.6;

          printf("%c,%hd,%d,%lld,%.1f,%.1llf\n", c, s, i, l, f, d);

          return 0;
        }
        '''
      self.do_run(src, '1,2,3,4,5.5,6.6\n')

    def test_vprintf(self):
      src = r'''
        #include <stdio.h>
        #include <stdarg.h>

        void print(char* format, ...) {
          va_list args;
          va_start (args, format);
          vprintf (format, args);
          va_end (args);
        }

        int main () {
           print("Call with %d variable argument.\n", 1);
           print("Call with %d variable %s.\n", 2, "arguments");

           return 0;
        }
        '''
      expected = '''
        Call with 1 variable argument.
        Call with 2 variable arguments.
        '''
      self.do_run(src, re.sub('(^|\n)\s+', '\\1', expected))

    def test_atoi(self):
      src = r'''
        #include <stdio.h>
        #include <stdlib.h>

        int main () {
          printf("%d\n", atoi(""));
          printf("%d\n", atoi("a"));
          printf("%d\n", atoi(" b"));
          printf("%d\n", atoi(" c "));
          printf("%d\n", atoi("6"));
          printf("%d\n", atoi(" 5"));
          printf("%d\n", atoi("4 "));
          printf("%d\n", atoi("3 6"));
          printf("%d\n", atoi(" 3 7"));
          printf("%d\n", atoi("9 d"));
          printf("%d\n", atoi(" 8 e"));
          return 0;
        }
        '''
      self.do_run(src)

    def test_sscanf(self):
      src = r'''
        #include <stdio.h>
        #include <string.h>
        #include <stdlib.h>

        int main () {
          #define CHECK(str) \
          { \
            char name[1000]; \
            memset(name, 0, 1000); \
            int prio = 99; \
            sscanf(str, "%s %d", name, &prio); \
            printf("%s : %d\n", name, prio); \
          }
          CHECK("en-us 2");
          CHECK("en-r");
          CHECK("en 3");

          printf("%f, %f\n", atof("1.234567"), atof("cheez"));

          return 0;
        }
        '''
      self.do_run(src)

      # Part 2: doubles (issue 148)
      if Settings.USE_TYPED_ARRAYS == 2:
        for ftype in ['float', 'double']:
          src = r'''
            #include <stdio.h>

            int main(){
                char strval1[] = "1.2345678901";
                char strval2[] = "1.23456789e5";
                char strval3[] = "1.23456789E5";
                char strval4[] = "1.2345678e-5";
                char strval5[] = "1.2345678E-5";
                double dblval = 1.2345678901;
                double tstval;

                sscanf(strval1, "%lf", &tstval);
                if(dblval != tstval) printf("FAIL: Values are not equal: %lf %lf\n", dblval, tstval);
                else printf("Pass: %lf %lf\n", tstval, dblval);

                sscanf(strval2, "%lf", &tstval);
                dblval = 123456.789;
                if(dblval != tstval) printf("FAIL: Values are not equal: %lf %lf\n", dblval, tstval);
                else printf("Pass: %lf %lf\n", tstval, dblval);

                sscanf(strval3, "%lf", &tstval);
                dblval = 123456.789;
                if(dblval != tstval) printf("FAIL: Values are not equal: %lf %lf\n", dblval, tstval);
                else printf("Pass: %lf %lf\n", tstval, dblval);

                sscanf(strval4, "%lf", &tstval);
                dblval = 0.000012345678;
                if(dblval != tstval) printf("FAIL: Values are not equal: %lf %lf\n", dblval, tstval);
                else printf("Pass: %lf %lf\n", tstval, dblval);

                sscanf(strval5, "%lf", &tstval);
                dblval = 0.000012345678;
                if(dblval != tstval) printf("FAIL: Values are not equal: %lf %lf\n", dblval, tstval);
                else printf("Pass: %lf %lf\n", tstval, dblval);

                return 0;
            }
          '''
          if ftype == 'float':
            self.do_run(src.replace('%lf', '%f').replace('double', 'float'), '''Pass: 1.234568 1.234568
Pass: 123456.789063 123456.789063
Pass: 123456.789063 123456.789063
Pass: 0.000012 0.000012
Pass: 0.000012 0.000012''')
          else:
            self.do_run(src)

    def test_langinfo(self):
      src = open(path_from_root('tests', 'langinfo', 'test.c'), 'r').read()
      expected = open(path_from_root('tests', 'langinfo', 'output.txt'), 'r').read()
      self.do_run(src, expected, extra_emscripten_args=['-H', 'libc/langinfo.h'])

    def test_files(self):
      if self.emcc_args is not None and '-O2' in self.emcc_args:
        self.emcc_args += ['--closure', '1'] # Use closure here, to test we don't break FS stuff

      Settings.CORRECT_SIGNS = 1 # Just so our output is what we expect. Can flip them both.
      post = '''
def process(filename):
  src = open(filename, 'r').read().replace('FS.init();', '').replace( # Disable normal initialization, replace with ours
    '// {{PRE_RUN_ADDITIONS}}',
    \'\'\'
      FS.createDataFile('/', 'somefile.binary', [100, 200, 50, 25, 10, 77, 123], true, false);  // 200 becomes -56, since signed chars are used in memory
      FS.createLazyFile('/', 'test.file', 'test.file', true, false);
      FS.root.write = true;
      var test_files_input = 'hi there!';
      var test_files_input_index = 0;
      FS.init(function() {
        return test_files_input.charCodeAt(test_files_input_index++) || null;
      });
    \'\'\'
  )
  open(filename, 'w').write(src)
'''
      other = open(os.path.join(self.get_dir(), 'test.file'), 'w')
      other.write('some data');
      other.close()

      src = open(path_from_root('tests', 'files.cpp'), 'r').read()
      self.do_run(src, 'size: 7\ndata: 100,-56,50,25,10,77,123\nloop: 100 -56 50 25 10 77 123 \ninput:hi there!\ntexto\ntexte\n$\n5 : 10,30,20,11,88\nother=some data.\nseeked=me da.\nseeked=ata.\nseeked=ta.\nfscanfed: 10 - hello\n',
                   post_build=post, extra_emscripten_args=['-H', 'libc/fcntl.h'])

    def test_folders(self):
      add_pre_run = '''
def process(filename):
  src = open(filename, 'r').read().replace(
    '// {{PRE_RUN_ADDITIONS}}',
    \'\'\'
      FS.createFolder('/', 'test', true, false);
      FS.createPath('/', 'test/hello/world/', true, false);
      FS.createPath('/test', 'goodbye/world/', true, false);
      FS.createPath('/test/goodbye', 'noentry', false, false);
      FS.createDataFile('/test', 'freeforall.ext', 'abc', true, true);
      FS.createDataFile('/test', 'restricted.ext', 'def', false, false);
    \'\'\'
  )
  open(filename, 'w').write(src)
'''
      src = r'''
        #include <stdio.h>
        #include <dirent.h>
        #include <errno.h>

        int main() {
          struct dirent *e;

          // Basic correct behaviour.
          DIR* d = opendir("/test");
          printf("--E: %d\n", errno);
          while ((e = readdir(d))) puts(e->d_name);
          printf("--E: %d\n", errno);

          // Empty folder; tell/seek.
          puts("****");
          d = opendir("/test/hello/world/");
          e = readdir(d);
          puts(e->d_name);
          int pos = telldir(d);
          e = readdir(d);
          puts(e->d_name);
          seekdir(d, pos);
          e = readdir(d);
          puts(e->d_name);

          // Errors.
          puts("****");
          printf("--E: %d\n", errno);
          d = opendir("/test/goodbye/noentry");
          printf("--E: %d, D: %d\n", errno, d);
          d = opendir("/i/dont/exist");
          printf("--E: %d, D: %d\n", errno, d);
          d = opendir("/test/freeforall.ext");
          printf("--E: %d, D: %d\n", errno, d);
          while ((e = readdir(d))) puts(e->d_name);
          printf("--E: %d\n", errno);

          return 0;
        }
        '''
      expected = '''
        --E: 0
        .
        ..
        hello
        goodbye
        freeforall.ext
        restricted.ext
        --E: 0
        ****
        .
        ..
        ..
        ****
        --E: 0
        --E: 13, D: 0
        --E: 2, D: 0
        --E: 20, D: 0
        --E: 9
      '''
      self.do_run(src, re.sub('(^|\n)\s+', '\\1', expected), post_build=add_pre_run)

    def test_stat(self):
      add_pre_run = '''
def process(filename):
  src = open(filename, 'r').read().replace(
    '// {{PRE_RUN_ADDITIONS}}',
    \'\'\'
      var f1 = FS.createFolder('/', 'test', true, true);
      var f2 = FS.createDataFile(f1, 'file', 'abcdef', true, true);
      var f3 = FS.createLink(f1, 'link', 'file', true, true);
      var f4 = FS.createDevice(f1, 'device', function(){}, function(){});
      f1.timestamp = f2.timestamp = f3.timestamp = f4.timestamp = new Date(1200000000000);
    \'\'\'
  )
  open(filename, 'w').write(src)
'''
      src = open(path_from_root('tests', 'stat', 'src.c'), 'r').read()
      expected = open(path_from_root('tests', 'stat', 'output.txt'), 'r').read()
      self.do_run(src, expected, post_build=add_pre_run, extra_emscripten_args=['-H', 'libc/fcntl.h'])

    def test_fcntl(self):
      add_pre_run = '''
def process(filename):
  src = open(filename, 'r').read().replace(
    '// {{PRE_RUN_ADDITIONS}}',
    "FS.createDataFile('/', 'test', 'abcdef', true, true);"
  )
  open(filename, 'w').write(src)
'''
      src = open(path_from_root('tests', 'fcntl', 'src.c'), 'r').read()
      expected = open(path_from_root('tests', 'fcntl', 'output.txt'), 'r').read()
      self.do_run(src, expected, post_build=add_pre_run, extra_emscripten_args=['-H', 'libc/fcntl.h'])

    def test_fcntl_open(self):
      add_pre_run = '''
def process(filename):
  src = open(filename, 'r').read().replace(
    '// {{PRE_RUN_ADDITIONS}}',
    \'\'\'
      FS.createDataFile('/', 'test-file', 'abcdef', true, true);
      FS.createFolder('/', 'test-folder', true, true);
      FS.root.write = true;
    \'\'\'
  )
  open(filename, 'w').write(src)
'''
      src = open(path_from_root('tests', 'fcntl-open', 'src.c'), 'r').read()
      expected = open(path_from_root('tests', 'fcntl-open', 'output.txt'), 'r').read()
      self.do_run(src, expected, post_build=add_pre_run, extra_emscripten_args=['-H', 'libc/fcntl.h'])

    def test_fcntl_misc(self):
      add_pre_run = '''
def process(filename):
  src = open(filename, 'r').read().replace(
    '// {{PRE_RUN_ADDITIONS}}',
    "FS.createDataFile('/', 'test', 'abcdef', true, true);"
  )
  open(filename, 'w').write(src)
'''
      src = open(path_from_root('tests', 'fcntl-misc', 'src.c'), 'r').read()
      expected = open(path_from_root('tests', 'fcntl-misc', 'output.txt'), 'r').read()
      self.do_run(src, expected, post_build=add_pre_run, extra_emscripten_args=['-H', 'libc/fcntl.h'])

    def test_poll(self):
      add_pre_run = '''
def process(filename):
  src = open(filename, 'r').read().replace(
    '// {{PRE_RUN_ADDITIONS}}',
    \'\'\'
      FS.createDataFile('/', 'file', 'abcdef', true, true);
      FS.createDevice('/', 'device', function() {}, function() {});
    \'\'\'
  )
  open(filename, 'w').write(src)
'''
      src = r'''
        #include <stdio.h>
        #include <errno.h>
        #include <fcntl.h>
        #include <poll.h>

        int main() {
          struct pollfd multi[5];
          multi[0].fd = open("/file", O_RDONLY, 0777);
          multi[1].fd = open("/device", O_RDONLY, 0777);
          multi[2].fd = 123;
          multi[3].fd = open("/file", O_RDONLY, 0777);
          multi[4].fd = open("/file", O_RDONLY, 0777);
          multi[0].events = POLLIN | POLLOUT | POLLNVAL | POLLERR;
          multi[1].events = POLLIN | POLLOUT | POLLNVAL | POLLERR;
          multi[2].events = POLLIN | POLLOUT | POLLNVAL | POLLERR;
          multi[3].events = 0x00;
          multi[4].events = POLLOUT | POLLNVAL | POLLERR;

          printf("ret: %d\n", poll(multi, 5, 123));
          printf("errno: %d\n", errno);
          printf("multi[0].revents: %d\n", multi[0].revents == (POLLIN | POLLOUT));
          printf("multi[1].revents: %d\n", multi[1].revents == (POLLIN | POLLOUT));
          printf("multi[2].revents: %d\n", multi[2].revents == POLLNVAL);
          printf("multi[3].revents: %d\n", multi[3].revents == 0);
          printf("multi[4].revents: %d\n", multi[4].revents == POLLOUT);

          return 0;
        }
        '''
      expected = r'''
        ret: 4
        errno: 0
        multi[0].revents: 1
        multi[1].revents: 1
        multi[2].revents: 1
        multi[3].revents: 1
        multi[4].revents: 1
        '''
      self.do_run(src, re.sub('(^|\n)\s+', '\\1', expected), post_build=add_pre_run, extra_emscripten_args=['-H', 'libc/fcntl.h,poll.h'])

    def test_statvfs(self):
      src = r'''
        #include <stdio.h>
        #include <errno.h>
        #include <sys/statvfs.h>

        int main() {
          struct statvfs s;

          printf("result: %d\n", statvfs("/test", &s));
          printf("errno: %d\n", errno);

          printf("f_bsize: %lu\n", s.f_bsize);
          printf("f_frsize: %lu\n", s.f_frsize);
          printf("f_blocks: %lu\n", s.f_blocks);
          printf("f_bfree: %lu\n", s.f_bfree);
          printf("f_bavail: %lu\n", s.f_bavail);
          printf("f_files: %lu\n", s.f_files);
          printf("f_ffree: %lu\n", s.f_ffree);
          printf("f_favail: %lu\n", s.f_favail);
          printf("f_fsid: %lu\n", s.f_fsid);
          printf("f_flag: %lu\n", s.f_flag);
          printf("f_namemax: %lu\n", s.f_namemax);

          return 0;
        }
        '''
      expected = r'''
        result: 0
        errno: 0
        f_bsize: 4096
        f_frsize: 4096
        f_blocks: 1000000
        f_bfree: 500000
        f_bavail: 500000
        f_files: 8
        f_ffree: 1000000
        f_favail: 1000000
        f_fsid: 42
        f_flag: 2
        f_namemax: 255
        '''
      self.do_run(src, re.sub('(^|\n)\s+', '\\1', expected))

    def test_libgen(self):
      src = r'''
        #include <stdio.h>
        #include <libgen.h>

        int main() {
          char p1[16] = "/usr/lib", p1x[16] = "/usr/lib";
          printf("%s -> ", p1);
          printf("%s : %s\n", dirname(p1x), basename(p1));

          char p2[16] = "/usr", p2x[16] = "/usr";
          printf("%s -> ", p2);
          printf("%s : %s\n", dirname(p2x), basename(p2));

          char p3[16] = "/usr/", p3x[16] = "/usr/";
          printf("%s -> ", p3);
          printf("%s : %s\n", dirname(p3x), basename(p3));

          char p4[16] = "/usr/lib///", p4x[16] = "/usr/lib///";
          printf("%s -> ", p4);
          printf("%s : %s\n", dirname(p4x), basename(p4));

          char p5[16] = "/", p5x[16] = "/";
          printf("%s -> ", p5);
          printf("%s : %s\n", dirname(p5x), basename(p5));

          char p6[16] = "///", p6x[16] = "///";
          printf("%s -> ", p6);
          printf("%s : %s\n", dirname(p6x), basename(p6));

          char p7[16] = "/usr/../lib/..", p7x[16] = "/usr/../lib/..";
          printf("%s -> ", p7);
          printf("%s : %s\n", dirname(p7x), basename(p7));

          char p8[16] = "", p8x[16] = "";
          printf("(empty) -> %s : %s\n", dirname(p8x), basename(p8));

          printf("(null) -> %s : %s\n", dirname(0), basename(0));

          return 0;
        }
        '''
      expected = '''
        /usr/lib -> /usr : lib
        /usr -> / : usr
        /usr/ -> / : usr
        /usr/lib/// -> /usr : lib
        / -> / : /
        /// -> / : /
        /usr/../lib/.. -> /usr/../lib : ..
        (empty) -> . : .
        (null) -> . : .
      '''
      self.do_run(src, re.sub('(^|\n)\s+', '\\1', expected))

    def test_utime(self):
      add_pre_run_and_checks = '''
def process(filename):
  src = open(filename, 'r').read().replace(
    '// {{PRE_RUN_ADDITIONS}}',
    \'\'\'
      var TEST_F1 = FS.createFolder('/', 'writeable', true, true);
      var TEST_F2 = FS.createFolder('/', 'unwriteable', true, false);
    \'\'\'
  ).replace(
    '// {{POST_RUN_ADDITIONS}}',
    \'\'\'
      print('first changed: ' + (TEST_F1.timestamp == 1200000000000));
      print('second changed: ' + (TEST_F2.timestamp == 1200000000000));
    \'\'\'
  )
  open(filename, 'w').write(src)
'''
      src = r'''
        #include <stdio.h>
        #include <errno.h>
        #include <utime.h>

        int main() {
          struct utimbuf t = {1000000000, 1200000000};
          char* writeable = "/writeable";
          char* unwriteable = "/unwriteable";

          utime(writeable, &t);
          printf("writeable errno: %d\n", errno);

          utime(unwriteable, &t);
          printf("unwriteable errno: %d\n", errno);

          return 0;
        }
        '''
      expected = '''
        writeable errno: 0
        unwriteable errno: 1
        first changed: true
        second changed: false
      '''
      self.do_run(src, re.sub('(^|\n)\s+', '\\1', expected), post_build=add_pre_run_and_checks)

    def test_fs_base(self):
      Settings.INCLUDE_FULL_LIBRARY = 1
      try:
        addJS = '''
def process(filename):
  import tools.shared as shared
  src = open(filename, 'r').read().replace('FS.init();', '').replace( # Disable normal initialization, replace with ours
    '// {{PRE_RUN_ADDITIONS}}',
    open(shared.path_from_root('tests', 'filesystem', 'src.js'), 'r').read())
  open(filename, 'w').write(src)
'''
        src = 'int main() {return 0;}\n'
        expected = open(path_from_root('tests', 'filesystem', 'output.txt'), 'r').read()
        self.do_run(src, expected, post_build=addJS, extra_emscripten_args=['-H', 'libc/fcntl.h,libc/sys/unistd.h,poll.h,libc/math.h,libc/langinfo.h,libc/time.h'])
      finally:
        Settings.INCLUDE_FULL_LIBRARY = 0

    def test_unistd_access(self):
      add_pre_run = '''
def process(filename):
  import tools.shared as shared
  src = open(filename, 'r').read().replace(
    '// {{PRE_RUN_ADDITIONS}}',
    open(shared.path_from_root('tests', 'unistd', 'access.js'), 'r').read()
  )
  open(filename, 'w').write(src)
'''
      src = open(path_from_root('tests', 'unistd', 'access.c'), 'r').read()
      expected = open(path_from_root('tests', 'unistd', 'access.out'), 'r').read()
      self.do_run(src, expected, post_build=add_pre_run)

    def test_unistd_curdir(self):
      add_pre_run = '''
def process(filename):
  import tools.shared as shared
  src = open(filename, 'r').read().replace(
    '// {{PRE_RUN_ADDITIONS}}',
    open(shared.path_from_root('tests', 'unistd', 'curdir.js'), 'r').read()
  )
  open(filename, 'w').write(src)
'''
      src = open(path_from_root('tests', 'unistd', 'curdir.c'), 'r').read()
      expected = open(path_from_root('tests', 'unistd', 'curdir.out'), 'r').read()
      self.do_run(src, expected, post_build=add_pre_run)

    def test_unistd_close(self):
      src = open(path_from_root('tests', 'unistd', 'close.c'), 'r').read()
      expected = open(path_from_root('tests', 'unistd', 'close.out'), 'r').read()
      self.do_run(src, expected)

    def test_unistd_confstr(self):
      src = open(path_from_root('tests', 'unistd', 'confstr.c'), 'r').read()
      expected = open(path_from_root('tests', 'unistd', 'confstr.out'), 'r').read()
      self.do_run(src, expected, extra_emscripten_args=['-H', 'libc/unistd.h'])

    def test_unistd_ttyname(self):
      add_pre_run = '''
def process(filename):
  import tools.shared as shared
  src = open(filename, 'r').read().replace(
    '// {{PRE_RUN_ADDITIONS}}',
    open(shared.path_from_root('tests', 'unistd', 'ttyname.js'), 'r').read()
  )
  open(filename, 'w').write(src)
'''
      src = open(path_from_root('tests', 'unistd', 'ttyname.c'), 'r').read()
      expected = open(path_from_root('tests', 'unistd', 'ttyname.out'), 'r').read()
      self.do_run(src, expected, post_build=add_pre_run)

    def test_unistd_dup(self):
      src = open(path_from_root('tests', 'unistd', 'dup.c'), 'r').read()
      expected = open(path_from_root('tests', 'unistd', 'dup.out'), 'r').read()
      self.do_run(src, expected)

    def test_unistd_pathconf(self):
      src = open(path_from_root('tests', 'unistd', 'pathconf.c'), 'r').read()
      expected = open(path_from_root('tests', 'unistd', 'pathconf.out'), 'r').read()
      self.do_run(src, expected)

    def test_unistd_truncate(self):
      add_pre_run = '''
def process(filename):
  import tools.shared as shared
  src = open(filename, 'r').read().replace(
    '// {{PRE_RUN_ADDITIONS}}',
    open(shared.path_from_root('tests', 'unistd', 'truncate.js'), 'r').read()
  )
  open(filename, 'w').write(src)
'''
      src = open(path_from_root('tests', 'unistd', 'truncate.c'), 'r').read()
      expected = open(path_from_root('tests', 'unistd', 'truncate.out'), 'r').read()
      self.do_run(src, expected, post_build=add_pre_run)

    def test_unistd_swab(self):
      src = open(path_from_root('tests', 'unistd', 'swab.c'), 'r').read()
      expected = open(path_from_root('tests', 'unistd', 'swab.out'), 'r').read()
      self.do_run(src, expected)

    def test_unistd_isatty(self):
      add_pre_run = '''
def process(filename):
  import tools.shared as shared
  src = open(filename, 'r').read().replace(
    '// {{PRE_RUN_ADDITIONS}}',
    open(shared.path_from_root('tests', 'unistd', 'isatty.js'), 'r').read()
  )
  open(filename, 'w').write(src)
'''
      src = open(path_from_root('tests', 'unistd', 'isatty.c'), 'r').read()
      expected = open(path_from_root('tests', 'unistd', 'isatty.out'), 'r').read()
      self.do_run(src, expected, post_build=add_pre_run)

    def test_unistd_sysconf(self):
      src = open(path_from_root('tests', 'unistd', 'sysconf.c'), 'r').read()
      expected = open(path_from_root('tests', 'unistd', 'sysconf.out'), 'r').read()
      self.do_run(src, expected)

    def test_unistd_login(self):
      src = open(path_from_root('tests', 'unistd', 'login.c'), 'r').read()
      expected = open(path_from_root('tests', 'unistd', 'login.out'), 'r').read()
      self.do_run(src, expected)

    def test_unistd_unlink(self):
      add_pre_run = '''
def process(filename):
  import tools.shared as shared
  src = open(filename, 'r').read().replace(
    '// {{PRE_RUN_ADDITIONS}}',
    open(shared.path_from_root('tests', 'unistd', 'unlink.js'), 'r').read()
  )
  open(filename, 'w').write(src)
'''
      src = open(path_from_root('tests', 'unistd', 'unlink.c'), 'r').read()
      expected = open(path_from_root('tests', 'unistd', 'unlink.out'), 'r').read()
      self.do_run(src, expected, post_build=add_pre_run)

    def test_unistd_links(self):
      add_pre_run = '''
def process(filename):
  import tools.shared as shared
  src = open(filename, 'r').read().replace(
    '// {{PRE_RUN_ADDITIONS}}',
    open(shared.path_from_root('tests', 'unistd', 'links.js'), 'r').read()
  )
  open(filename, 'w').write(src)
'''
      src = open(path_from_root('tests', 'unistd', 'links.c'), 'r').read()
      expected = open(path_from_root('tests', 'unistd', 'links.out'), 'r').read()
      self.do_run(src, expected, post_build=add_pre_run)

    def test_unistd_sleep(self):
      src = open(path_from_root('tests', 'unistd', 'sleep.c'), 'r').read()
      expected = open(path_from_root('tests', 'unistd', 'sleep.out'), 'r').read()
      self.do_run(src, expected)

    def test_unistd_io(self):
      add_pre_run = '''
def process(filename):
  import tools.shared as shared
  src = open(filename, 'r').read().replace(
    '// {{PRE_RUN_ADDITIONS}}',
    open(shared.path_from_root('tests', 'unistd', 'io.js'), 'r').read()
  )
  open(filename, 'w').write(src)
'''
      src = open(path_from_root('tests', 'unistd', 'io.c'), 'r').read()
      expected = open(path_from_root('tests', 'unistd', 'io.out'), 'r').read()
      self.do_run(src, expected, post_build=add_pre_run)

    def test_unistd_misc(self):
      src = open(path_from_root('tests', 'unistd', 'misc.c'), 'r').read()
      expected = open(path_from_root('tests', 'unistd', 'misc.out'), 'r').read()
      self.do_run(src, expected)

    def test_uname(self):
      src = r'''
        #include <stdio.h>
        #include <sys/utsname.h>

        int main() {
          struct utsname u;
          printf("ret: %d\n", uname(&u));
          printf("sysname: %s\n", u.sysname);
          printf("nodename: %s\n", u.nodename);
          printf("release: %s\n", u.release);
          printf("version: %s\n", u.version);
          printf("machine: %s\n", u.machine);
          printf("invalid: %d\n", uname(0));
          return 0;
        }
        '''
      expected = '''
        ret: 0
        sysname: Emscripten
        nodename: emscripten
        release: 1.0
        version: #1
        machine: x86-JS
      '''
      self.do_run(src, re.sub('(^|\n)\s+', '\\1', expected))

    def test_env(self):
      src = open(path_from_root('tests', 'env', 'src.c'), 'r').read()
      expected = open(path_from_root('tests', 'env', 'output.txt'), 'r').read()
      self.do_run(src, expected)

    def test_getloadavg(self):
      src = r'''
        #include <stdio.h>
        #include <stdlib.h>

        int main() {
          double load[5] = {42.13, 42.13, 42.13, 42.13, 42.13};
          printf("ret: %d\n", getloadavg(load, 5));
          printf("load[0]: %.3lf\n", load[0]);
          printf("load[1]: %.3lf\n", load[1]);
          printf("load[2]: %.3lf\n", load[2]);
          printf("load[3]: %.3lf\n", load[3]);
          printf("load[4]: %.3lf\n", load[4]);
          return 0;
        }
        '''
      expected = '''
        ret: 3
        load[0]: 0.100
        load[1]: 0.100
        load[2]: 0.100
        load[3]: 42.130
        load[4]: 42.130
      '''
      self.do_run(src, re.sub('(^|\n)\s+', '\\1', expected))

    def test_ctype(self):
      # The bit fiddling done by the macros using __ctype_b_loc requires this.
      Settings.CORRECT_SIGNS = 1
      src = open(path_from_root('tests', 'ctype', 'src.c'), 'r').read()
      expected = open(path_from_root('tests', 'ctype', 'output.txt'), 'r').read()
      self.do_run(src, expected)
      CORRECT_SIGNS = 0

    # libc++ tests

    def test_iostream(self):
      src = '''
        #include <iostream>

        int main()
        {
          std::cout << "hello world" << std::endl << 77 << "." << std::endl;
          return 0;
        }
      '''

      self.do_run(src, 'hello world\n77.\n')

    def test_stdvec(self):
      src = '''
        #include <vector>
        #include <stdio.h>

        struct S {
            int a;
            float b;
        };

        void foo(int a, float b)
        {
          printf("%d:%.2f\\n", a, b);
        }

        int main ( int argc, char *argv[] )
        {
          std::vector<S> ar;  
          S s;

          s.a = 789;
          s.b = 123.456f;
          ar.push_back(s);

          s.a = 0;
          s.b = 100.1f;
          ar.push_back(s);

          foo(ar[0].a, ar[0].b);
          foo(ar[1].a, ar[1].b);
        }
      '''

      self.do_run(src, '789:123.46\n0:100.1')

    ### 'Medium' tests

    def test_fannkuch(self):
        results = [ (1,0), (2,1), (3,2), (4,4), (5,7), (6,10), (7, 16), (8,22) ]
        for i, j in results:
          src = open(path_from_root('tests', 'fannkuch.cpp'), 'r').read()
          self.do_run(src, 'Pfannkuchen(%d) = %d.' % (i,j), [str(i)], no_build=i>1)

    def test_raytrace(self):
        if Settings.USE_TYPED_ARRAYS == 2: return self.skip('Relies on double value rounding, extremely sensitive')

        src = open(path_from_root('tests', 'raytrace.cpp'), 'r').read().replace('double', 'float')
        output = open(path_from_root('tests', 'raytrace.ppm'), 'r').read()
        self.do_run(src, output, ['3', '16'])#, build_ll_hook=self.do_autodebug)

    def test_fasta(self):
        results = [ (1,'''GG*ctt**tgagc*'''), (20,'''GGCCGGGCGCGGTGGCTCACGCCTGTAATCCCAGCACTTT*cttBtatcatatgctaKggNcataaaSatgtaaaDcDRtBggDtctttataattcBgtcg**tacgtgtagcctagtgtttgtgttgcgttatagtctatttgtggacacagtatggtcaaa**tgacgtcttttgatctgacggcgttaacaaagatactctg*'''),
(50,'''GGCCGGGCGCGGTGGCTCACGCCTGTAATCCCAGCACTTTGGGAGGCCGAGGCGGGCGGA*TCACCTGAGGTCAGGAGTTCGAGACCAGCCTGGCCAACAT*cttBtatcatatgctaKggNcataaaSatgtaaaDcDRtBggDtctttataattcBgtcg**tactDtDagcctatttSVHtHttKtgtHMaSattgWaHKHttttagacatWatgtRgaaa**NtactMcSMtYtcMgRtacttctWBacgaa**agatactctgggcaacacacatacttctctcatgttgtttcttcggacctttcataacct**ttcctggcacatggttagctgcacatcacaggattgtaagggtctagtggttcagtgagc**ggaatatcattcgtcggtggtgttaatctatctcggtgtagcttataaatgcatccgtaa**gaatattatgtttatttgtcggtacgttcatggtagtggtgtcgccgatttagacgtaaa**ggcatgtatg*''') ]
        for i, j in results:
          src = open(path_from_root('tests', 'fasta.cpp'), 'r').read()
          self.do_run(src, j, [str(i)], lambda x: x.replace('\n', '*'), no_build=i>1)

    def test_dlmalloc(self):
      Settings.CORRECT_SIGNS = 2
      Settings.CORRECT_SIGNS_LINES = ['src.cpp:' + str(i+4) for i in [4816, 4191, 4246, 4199, 4205, 4235, 4227]]
      Settings.TOTAL_MEMORY = 100*1024*1024 # needed with typed arrays

      src = open(path_from_root('src', 'dlmalloc.c'), 'r').read() + '\n\n\n' + open(path_from_root('tests', 'dlmalloc_test.c'), 'r').read()
      self.do_run(src, '*1,0*', ['200', '1'])
      self.do_run(src, '*400,0*', ['400', '400'], no_build=True)

      # Linked version
      src = open(path_from_root('tests', 'dlmalloc_test.c'), 'r').read()
      self.do_run(src, '*1,0*', ['200', '1'], extra_emscripten_args=['-m'])
      self.do_run(src, '*400,0*', ['400', '400'], extra_emscripten_args=['-m'], no_build=True)

      if self.emcc_args == []: # TODO: do this in other passes too, passing their opts into emcc
        # emcc should build in dlmalloc automatically, and do all the sign correction etc. for it

        try_delete(os.path.join(self.get_dir(), 'src.cpp.o.js'))
        output = Popen([EMCC, path_from_root('tests', 'dlmalloc_test.c'),
                        '-o', os.path.join(self.get_dir(), 'src.cpp.o.js')], stdout=PIPE, stderr=self.stderr_redirect).communicate()
        #print output

        self.do_run('x', '*1,0*', ['200', '1'], no_build=True)
        self.do_run('x', '*400,0*', ['400', '400'], no_build=True)

    def test_libcxx(self):
      self.do_run(path_from_root('tests', 'libcxx'),
                   'june -> 30\nPrevious (in alphabetical order) is july\nNext (in alphabetical order) is march',
                   main_file='main.cpp', additional_files=['hash.cpp'])

      # This will fail without using libcxx, as libstdc++ (gnu c++ lib) will use but not link in 
      # __ZSt29_Rb_tree_insert_and_rebalancebPSt18_Rb_tree_node_baseS0_RS_
      # So a way to avoid that problem is to include libcxx, as done here
      self.do_run('''
        #include <set>
        #include <stdio.h>
        int main() {
          std::set<int> *fetchOriginatorNums = new std::set<int>();
          fetchOriginatorNums->insert(171);
          printf("hello world\\n");
          return 1;
        }
        ''', 'hello world', includes=[path_from_root('tests', 'libcxx', 'include')]);
        
    def test_static_variable(self):
      src = '''
        #include <stdio.h>

        struct DATA
        {
            int value;
    
            DATA()
            {
                value = 0;
            }
        };

        DATA & GetData()
        {
            static DATA data;
    
            return data;
        }

        int main()
        {
            GetData().value = 10;
            printf( "value:%i", GetData().value );
        }
      '''
      self.do_run(src, 'value:10')

    def test_cubescript(self):
      if self.emcc_args is not None and '-O2' in self.emcc_args:
        self.emcc_args += ['--closure', '1'] # Use closure here for some additional coverage

      Building.COMPILER_TEST_OPTS = [] # remove -g, so we have one test without it by default
      Settings.SAFE_HEAP = 0 # Has some actual loads of unwritten-to places, in the C++ code...

      # Overflows happen in hash loop
      Settings.CORRECT_OVERFLOWS = 1
      Settings.CHECK_OVERFLOWS = 0

      if Settings.USE_TYPED_ARRAYS == 2:
        Settings.CORRECT_SIGNS = 1

      self.do_run(path_from_root('tests', 'cubescript'), '*\nTemp is 33\n9\n5\nhello, everyone\n*', main_file='command.cpp')

    def test_gcc_unmangler(self):
      self.do_run(path_from_root('third_party'), '*d_demangle(char const*, int, unsigned int*)*', args=['_ZL10d_demanglePKciPj'], main_file='gcc_demangler.c')

      #### Code snippet that is helpful to search for nonportable optimizations ####
      #global LLVM_OPT_OPTS
      #for opt in ['-aa-eval', '-adce', '-always-inline', '-argpromotion', '-basicaa', '-basiccg', '-block-placement', '-break-crit-edges', '-codegenprepare', '-constmerge', '-constprop', '-correlated-propagation', '-count-aa', '-dce', '-deadargelim', '-deadtypeelim', '-debug-aa', '-die', '-domfrontier', '-domtree', '-dse', '-extract-blocks', '-functionattrs', '-globaldce', '-globalopt', '-globalsmodref-aa', '-gvn', '-indvars', '-inline', '-insert-edge-profiling', '-insert-optimal-edge-profiling', '-instcombine', '-instcount', '-instnamer', '-internalize', '-intervals', '-ipconstprop', '-ipsccp', '-iv-users', '-jump-threading', '-lazy-value-info', '-lcssa', '-lda', '-libcall-aa', '-licm', '-lint', '-live-values', '-loop-deletion', '-loop-extract', '-loop-extract-single', '-loop-index-split', '-loop-reduce', '-loop-rotate', '-loop-unroll', '-loop-unswitch', '-loops', '-loopsimplify', '-loweratomic', '-lowerinvoke', '-lowersetjmp', '-lowerswitch', '-mem2reg', '-memcpyopt', '-memdep', '-mergefunc', '-mergereturn', '-module-debuginfo', '-no-aa', '-no-profile', '-partial-inliner', '-partialspecialization', '-pointertracking', '-postdomfrontier', '-postdomtree', '-preverify', '-prune-eh', '-reassociate', '-reg2mem', '-regions', '-scalar-evolution', '-scalarrepl', '-sccp', '-scev-aa', '-simplify-libcalls', '-simplify-libcalls-halfpowr', '-simplifycfg', '-sink', '-split-geps', '-sretpromotion', '-strip', '-strip-dead-debug-info', '-strip-dead-prototypes', '-strip-debug-declare', '-strip-nondebug', '-tailcallelim', '-tailduplicate', '-targetdata', '-tbaa']:
      #  LLVM_OPT_OPTS = [opt]
      #  try:
      #    self.do_run(path_from_root(['third_party']), '*d_demangle(char const*, int, unsigned int*)*', args=['_ZL10d_demanglePKciPj'], main_file='gcc_demangler.c')
      #    print opt, "ok"
      #  except:
      #    print opt, "FAIL"

    def test_lua(self):
      try:
        os.environ['EMCC_LEAVE_INPUTS_RAW'] = '1'

        if Settings.QUANTUM_SIZE == 1: return self.skip('TODO: make this work')

        # Overflows in luaS_newlstr hash loop
        Settings.SAFE_HEAP = 0 # Has various warnings, with copied HEAP_HISTORY values (fixed if we copy 'null' as the type)
        Settings.CORRECT_OVERFLOWS = 1
        Settings.CHECK_OVERFLOWS = 0
        Settings.CORRECT_SIGNS = 1 # Not sure why, but needed
        Settings.INIT_STACK = 1 # TODO: Investigate why this is necessary

        self.do_ll_run(path_from_root('tests', 'lua', 'lua.ll'),
                        'hello lua world!\n17\n1\n2\n3\n4\n7',
                        args=['-e', '''print("hello lua world!");print(17);for x = 1,4 do print(x) end;print(10-3)'''],
                        output_nicerizer=lambda string: string.replace('\n\n', '\n').replace('\n\n', '\n'),
                        extra_emscripten_args=['-H', 'libc/fcntl.h,libc/sys/unistd.h,poll.h,libc/math.h,libc/langinfo.h,libc/time.h'])
      finally:
        del os.environ['EMCC_LEAVE_INPUTS_RAW']

    def get_build_dir(self):
      return os.path.join(self.get_dir(), 'building')

    def get_freetype(self):
      Settings.INIT_STACK = 1 # TODO: Investigate why this is necessary

      return self.get_library('freetype', os.path.join('objs', '.libs', 'libfreetype.a.bc'))

    def test_freetype(self):
      if Settings.QUANTUM_SIZE == 1: return self.skip('TODO: Figure out and try to fix')

      if Building.LLVM_OPTS: Settings.RELOOP = 0 # Too slow; we do care about typed arrays and MICRO_OPTS though

      if Settings.CORRECT_SIGNS == 0: Settings.CORRECT_SIGNS = 1 # Not sure why, but needed

      post = '''
def process(filename):
  import tools.shared as shared
  # Embed the font into the document
  src = open(filename, 'r').read().replace(
    '// {{PRE_RUN_ADDITIONS}}',
    "FS.createDataFile('/', 'font.ttf', %s, true, false);" % str(
      map(ord, open(shared.path_from_root('tests', 'freetype', 'LiberationSansBold.ttf'), 'rb').read())
    )
  )
  open(filename, 'w').write(src)
'''
      # Main
      self.do_run(open(path_from_root('tests', 'freetype', 'main.c'), 'r').read(),
                   open(path_from_root('tests', 'freetype', 'ref.txt'), 'r').read(),
                   ['font.ttf', 'test!', '150', '120', '25'],
                   libraries=[self.get_freetype()],
                   includes=[path_from_root('tests', 'freetype', 'include')],
                   post_build=post)
                   #build_ll_hook=self.do_autodebug)

    def test_sqlite(self):
      # gcc -O3 -I/home/alon/Dev/emscripten/tests/sqlite -ldl src.c
      if Settings.QUANTUM_SIZE == 1: return self.skip('TODO FIXME')
      Settings.RELOOP = 0 # too slow

      pgo_data = read_pgo_data(path_from_root('tests', 'sqlite', 'sqlite-autooptimize.fails.txt'))

      Settings.CORRECT_SIGNS = 1 # XXX: in default, we fail with 2 here, even though the pgo_data should be correct (and works in s_0_0). Investigate this.
      Settings.CORRECT_SIGNS_LINES = pgo_data['signs_lines']
      Settings.CORRECT_OVERFLOWS = 0
      Settings.CORRECT_ROUNDINGS = 0
      Settings.SAFE_HEAP = 0 # uses time.h to set random bytes, other stuff
      Settings.DISABLE_EXCEPTION_CATCHING = 1
      Settings.FAST_MEMORY = 4*1024*1024
      Settings.EXPORTED_FUNCTIONS = ['_main', '_sqlite3_open', '_sqlite3_close', '_sqlite3_exec', '_sqlite3_free', '_callback'];

      Settings.INVOKE_RUN = 0 # We append code that does run() ourselves

      post = '''
def process(filename):
  src = open(filename, 'a')
  src.write(\'\'\'
    FS.init();
    FS.root.write = true;
    FS.ignorePermissions = true; // /dev is read-only
    FS.createPath('/', 'dev/shm/tmp', true, true);
    FS.ignorePermissions = false;
    FS.currentPath = '/dev/shm/tmp';
    run();
  \'\'\')
  src.close()
'''

      self.do_run(r'''
                        #define SQLITE_DISABLE_LFS
                        #define LONGDOUBLE_TYPE double
                        #define SQLITE_INT64_TYPE int
                        #define SQLITE_THREADSAFE 0
                   ''' + open(path_from_root('tests', 'sqlite', 'sqlite3.c'), 'r').read() +
                         open(path_from_root('tests', 'sqlite', 'benchmark.c'), 'r').read(),
                   open(path_from_root('tests', 'sqlite', 'benchmark.txt'), 'r').read(),
                   includes=[path_from_root('tests', 'sqlite')],
                   force_c=True,
                   extra_emscripten_args=['-m'],
                   js_engines=[SPIDERMONKEY_ENGINE], # V8 is slow
                   post_build=post)#,build_ll_hook=self.do_autodebug)

    def test_zlib(self):
      if self.emcc_args is not None and '-O2' in self.emcc_args:
        self.emcc_args += ['--closure', '1'] # Use closure here for some additional coverage

      Settings.CORRECT_SIGNS = 1

      self.do_run(open(path_from_root('tests', 'zlib', 'example.c'), 'r').read(),
                   open(path_from_root('tests', 'zlib', 'ref.txt'), 'r').read(),
                   libraries=[self.get_library('zlib', os.path.join('libz.a.bc'), make_args=['libz.a'])],
                   includes=[path_from_root('tests', 'zlib')],
                   force_c=True)

    def test_the_bullet(self): # Called thus so it runs late in the alphabetical cycle... it is long
      if Building.LLVM_OPTS: Settings.SAFE_HEAP = 0 # Optimizations make it so we do not have debug info on the line we need to ignore

      # Note: this is also a good test of per-file and per-line changes (since we have multiple files, and correct specific lines)
      if Settings.SAFE_HEAP:
        # Ignore bitfield warnings
        Settings.SAFE_HEAP = 3
        Settings.SAFE_HEAP_LINES = ['btVoronoiSimplexSolver.h:40', 'btVoronoiSimplexSolver.h:41',
                                    'btVoronoiSimplexSolver.h:42', 'btVoronoiSimplexSolver.h:43']

      self.do_run(open(path_from_root('tests', 'bullet', 'Demos', 'HelloWorld', 'HelloWorld.cpp'), 'r').read(),
                   [open(path_from_root('tests', 'bullet', 'output.txt'), 'r').read(), # different roundings
                    open(path_from_root('tests', 'bullet', 'output2.txt'), 'r').read()],
                   libraries=[self.get_library('bullet', [os.path.join('src', '.libs', 'libBulletCollision.a.bc'),
                                                          os.path.join('src', '.libs', 'libBulletDynamics.a.bc'),
                                                          os.path.join('src', '.libs', 'libLinearMath.a.bc')],
                                               configure_args=['--disable-demos','--disable-dependency-tracking'])],
                   includes=[path_from_root('tests', 'bullet', 'src')],
                   js_engines=[SPIDERMONKEY_ENGINE]) # V8 issue 1407

    def test_poppler(self):
      if not self.emcc_args == []: return self.skip('very slow, we only do this in default')

      Settings.SAFE_HEAP = 0 # Has variable object

      Settings.CORRECT_OVERFLOWS = 1
      Settings.CORRECT_SIGNS = 1

      Building.COMPILER_TEST_OPTS += [
        '-I' + path_from_root('tests', 'libcxx', 'include'), # Avoid libstdc++ linking issue, see libcxx test
        '-I' + path_from_root('tests', 'freetype', 'include'),
        '-I' + path_from_root('tests', 'poppler', 'include'),
      ]

      Settings.INVOKE_RUN = 0 # We append code that does run() ourselves

      # See post(), below
      input_file = open(os.path.join(self.get_dir(), 'paper.pdf.js'), 'w')
      input_file.write(str(map(ord, open(path_from_root('tests', 'poppler', 'paper.pdf'), 'rb').read())))
      input_file.close()

      post = '''
def process(filename):
  # To avoid loading this large file to memory and altering it, we simply append to the end
  src = open(filename, 'a')
  src.write(
    \'\'\'
      FS.ignorePermissions = true;
      FS.createDataFile('/', 'paper.pdf', eval(read('paper.pdf.js')), true, false);
      FS.root.write = true;
      FS.ignorePermissions = false;
      run();
      print("Data: " + JSON.stringify(FS.root.contents['filename-1.ppm'].contents.map(function(x) { return unSign(x, 8) })));
    \'\'\'
  )
  src.close()
'''

      #fontconfig = self.get_library('fontconfig', [os.path.join('src', '.libs', 'libfontconfig.a')]) # Used in file, but not needed, mostly

      freetype = self.get_freetype()

      poppler = self.get_library('poppler',
                                 [os.path.join('poppler', '.libs', 'libpoppler.so.13.0.0'),
                                  os.path.join('goo', '.libs', 'libgoo.a.bc'),
                                  os.path.join('fofi', '.libs', 'libfofi.a.bc'),
                                  os.path.join('splash', '.libs', 'libsplash.a.bc'),
                                  os.path.join('utils', 'pdftoppm.o'),
                                  os.path.join('utils', 'parseargs.o')],
                                 configure_args=['--disable-libjpeg', '--disable-libpng', '--disable-poppler-qt', '--disable-poppler-qt4', '--disable-cms'])

      # Combine libraries

      combined = os.path.join(self.get_build_dir(), 'combined.bc')
      Building.link([freetype, poppler], combined)

      self.do_ll_run(combined,
                     map(ord, open(path_from_root('tests', 'poppler', 'ref.ppm'), 'r').read()).__str__().replace(' ', ''),
                     args='-scale-to 512 paper.pdf filename'.split(' '),
                     post_build=post)
                     #, build_ll_hook=self.do_autodebug)

    def test_openjpeg(self):
      if Settings.USE_TYPED_ARRAYS == 2:
        Settings.CORRECT_SIGNS = 1
      else:
        Settings.CORRECT_SIGNS = 2
        Settings.CORRECT_SIGNS_LINES = ["mqc.c:566", "mqc.c:317"]

      post = '''
def process(filename):
  import tools.shared as shared
  original_j2k = shared.path_from_root('tests', 'openjpeg', 'syntensity_lobby_s.j2k')
  src = open(filename, 'r').read().replace(
    '// {{PRE_RUN_ADDITIONS}}',
    "FS.createDataFile('/', 'image.j2k', %s, true, false);FS.root.write = true;" % shared.line_splitter(str(
      map(ord, open(original_j2k, 'rb').read())
    ))
  ).replace(
    '// {{POST_RUN_ADDITIONS}}',
    "print('Data: ' + JSON.stringify(FS.root.contents['image.raw'].contents));"
  )
  open(filename, 'w').write(src)
'''

      shutil.copy(path_from_root('tests', 'openjpeg', 'opj_config.h'), self.get_dir())

      lib = self.get_library('openjpeg',
                             [os.path.join('bin', 'libopenjpeg.so.1.4.0'),
                              os.path.sep.join('codec/CMakeFiles/j2k_to_image.dir/index.c.o'.split('/')),
                              os.path.sep.join('codec/CMakeFiles/j2k_to_image.dir/convert.c.o'.split('/')),
                              os.path.sep.join('codec/CMakeFiles/j2k_to_image.dir/__/common/color.c.o'.split('/')),
                              os.path.sep.join('codec/CMakeFiles/j2k_to_image.dir/__/common/getopt.c.o'.split('/'))],
                             configure=['cmake', '.'],
                             #configure_args=['--enable-tiff=no', '--enable-jp3d=no', '--enable-png=no'],
                             make_args=[]) # no -j 2, since parallel builds can fail

      # We use doubles in JS, so we get slightly different values than native code. So we
      # check our output by comparing the average pixel difference
      def image_compare(output):
        # Get the image generated by JS, from the JSON.stringify'd array
        m = re.search('\[[\d, -]*\]', output)
        try:
          js_data = eval(m.group(0))
        except AttributeError:
          print 'Failed to find proper image output in: ' + output
          raise

        js_data = map(lambda x: x if x >= 0 else 256+x, js_data) # Our output may be signed, so unsign it

        # Get the correct output
        true_data = open(path_from_root('tests', 'openjpeg', 'syntensity_lobby_s.raw'), 'rb').read()

        # Compare them
        assert(len(js_data) == len(true_data))
        num = len(js_data)
        diff_total = js_total = true_total = 0
        for i in range(num):
          js_total += js_data[i]
          true_total += ord(true_data[i])
          diff_total += abs(js_data[i] - ord(true_data[i]))
        js_mean = js_total/float(num)
        true_mean = true_total/float(num)
        diff_mean = diff_total/float(num)

        image_mean = 83.265
        #print '[image stats:', js_mean, image_mean, true_mean, diff_mean, num, ']'
        assert abs(js_mean - image_mean) < 0.01
        assert abs(true_mean - image_mean) < 0.01
        assert diff_mean < 0.01

        return output

      self.do_run(open(path_from_root('tests', 'openjpeg', 'codec', 'j2k_to_image.c'), 'r').read(),
                   'Successfully generated', # The real test for valid output is in image_compare
                   '-i image.j2k -o image.raw'.split(' '),
                   libraries=[lib],
                   includes=[path_from_root('tests', 'openjpeg', 'libopenjpeg'),
                             path_from_root('tests', 'openjpeg', 'codec'),
                             path_from_root('tests', 'openjpeg', 'common'),
                             os.path.join(self.get_build_dir(), 'openjpeg')],
                   force_c=True,
                   post_build=post,
                   output_nicerizer=image_compare)#, build_ll_hook=self.do_autodebug)

    def test_python(self):
      if Settings.QUANTUM_SIZE == 1: return self.skip('TODO: make this work')

      # Overflows in string_hash
      Settings.CORRECT_OVERFLOWS = 1
      Settings.CHECK_OVERFLOWS = 0
      Settings.RELOOP = 0 # Too slow; we do care about typed arrays and MICRO_OPTS though
      Settings.SAFE_HEAP = 0 # Has bitfields which are false positives. Also the PyFloat_Init tries to detect endianness.
      Settings.CORRECT_SIGNS = 1 # Not sure why, but needed
      Settings.EXPORTED_FUNCTIONS = ['_main', '_PyRun_SimpleStringFlags'] # for the demo

      self.do_ll_run(path_from_root('tests', 'python', 'python.ll'),
                      'hello python world!\n[0, 2, 4, 6]\n5\n22\n5.470000',
                      args=['-S', '-c' '''print "hello python world!"; print [x*2 for x in range(4)]; t=2; print 10-3-t; print (lambda x: x*2)(11); print '%f' % 5.47'''],
                      extra_emscripten_args=['-m'])

    # Test cases in separate files. Note that these files may contain invalid .ll!
    # They are only valid enough for us to read for test purposes, not for llvm-as
    # to process.
    def test_cases(self):
      try:
        self.banned_js_engines = [NODE_JS] # node issue 1669, exception causes stdout not to be flushed

        os.environ['EMCC_LEAVE_INPUTS_RAW'] = '1'

        Settings.CHECK_OVERFLOWS = 0
        if Building.LLVM_OPTS: return self.skip("Our code is not exactly 'normal' llvm assembly")

        for name in glob.glob(path_from_root('tests', 'cases', '*.ll')):
          shortname = name.replace('.ll', '')
          if '' not in shortname: continue
          print "Testing case '%s'..." % shortname
          output_file = path_from_root('tests', 'cases', shortname + '.txt')
          if Settings.QUANTUM_SIZE == 1:
            q1_output_file = path_from_root('tests', 'cases', shortname + '_q1.txt')
            if os.path.exists(q1_output_file):
              output_file = q1_output_file
          if os.path.exists(output_file):
            output = open(output_file, 'r').read()
          else:
            output = 'hello, world!'
          if output.rstrip() != 'skip':
            self.do_ll_run(path_from_root('tests', 'cases', name), output)
          # Optional source checking, a python script that gets a global generated with the source
          src_checker = path_from_root('tests', 'cases', shortname + '.py')
          if os.path.exists(src_checker):
            generated = open('src.cpp.o.js').read()
            exec(open(src_checker).read())

      finally:
        del os.environ['EMCC_LEAVE_INPUTS_RAW']

    # Autodebug the code
    def do_autodebug(self, filename):
      output = Popen(['python', AUTODEBUGGER, filename+'.o.ll', filename+'.o.ll.ll'], stdout=PIPE, stderr=self.stderr_redirect).communicate()[0]
      assert 'Success.' in output, output
      self.prep_ll_run(filename, filename+'.o.ll.ll', force_recompile=True) # rebuild .bc # TODO: use code in do_autodebug_post for this

    # Autodebug the code, after LLVM opts. Will only work once!
    def do_autodebug_post(self, filename):
      if not hasattr(self, 'post'):
        print 'Asking for post re-call'
        self.post = True
        return True
      print 'Autodebugging during post time'
      delattr(self, 'post')
      output = Popen(['python', AUTODEBUGGER, filename+'.o.ll', filename+'.o.ll.ll'], stdout=PIPE, stderr=self.stderr_redirect).communicate()[0]
      assert 'Success.' in output, output
      shutil.copyfile(filename + '.o.ll.ll', filename + '.o.ll')
      Building.llvm_as(filename)
      Building.llvm_dis(filename)

    def test_autodebug(self):
      if Building.LLVM_OPTS: return self.skip('LLVM opts mess us up')

      # Run a test that should work, generating some code
      self.test_structs()

      filename = os.path.join(self.get_dir(), 'src.cpp')
      self.do_autodebug(filename)

      # Compare to each other, and to expected output
      self.do_ll_run(path_from_root('tests', filename+'.o.ll.ll'))

      # Test using build_ll_hook
      src = '''
          #include <stdio.h>

          char cache[256], *next = cache;

          int main()
          {
            cache[10] = 25;
            next[20] = 51;
            int x = cache[10];
            double y = 11.52;
            printf("*%d,%d,%.2f*\\n", x, cache[20], y);
            return 0;
          }
        '''
      self.do_run(src, build_ll_hook=self.do_autodebug)
      self.do_run(src, 'AD:', build_ll_hook=self.do_autodebug)

    def test_dfe(self):
      def hook(filename):
        ll = open(filename + '.o.ll').read()
        assert 'unneeded' not in ll, 'DFE should remove the unneeded function'

      src = '''
          #include <stdio.h>

          void unneeded()
          {
            printf("some totally useless stuff\\n");
          }

          int main()
          {
            printf("*hello slim world*\\n");
            return 0;
          }
        '''
      # Using build_ll_hook forces a recompile, which leads to DFE being done even without opts
      self.do_run(src, '*hello slim world*', build_ll_hook=hook)

    def test_profiling(self):
      src = '''
          #include <emscripten.h>
          #include <unistd.h>

          int main()
          {
            EMSCRIPTEN_PROFILE_INIT(3);
            EMSCRIPTEN_PROFILE_BEGIN(0);
            usleep(10 * 1000);
            EMSCRIPTEN_PROFILE_END(0);
            EMSCRIPTEN_PROFILE_BEGIN(1);
            usleep(50 * 1000);
            EMSCRIPTEN_PROFILE_END(1);
            EMSCRIPTEN_PROFILE_BEGIN(2);
            usleep(250 * 1000);
            EMSCRIPTEN_PROFILE_END(2);
            return 0;
          }
        '''

      post1 = '''
def process(filename):
  src = open(filename, 'a')
  src.write(\'\'\'
    Profiling.dump();
  \'\'\')
  src.close()
'''

      self.do_run(src, '''Profiling data:
Block 0: ''', post_build=post1)

      # Part 2: old JS version

      Settings.PROFILE = 1
      Settings.INVOKE_RUN = 0

      src = '''
          #include <stdio.h>

          int inner1(int x) {
            for (int i = 0; i < 20; i++)
              x += x/3;
            return x;
          }
          int inner2(int x) {
            for (int i = 0; i < 10; i++)
              x -= x/4;
            return x;
          }
          int inner3(int x) {
            for (int i = 0; i < 5; i++)
              x += x/2;
            x = inner1(x) - inner2(x);
            for (int i = 0; i < 5; i++)
              x -= x/2;
            return x;
          }

          int main()
          {
            int total = 0;
            for (int i = 0; i < 5000; i++)
              total += inner1(i) - 4*inner3(i);
            printf("*%d*\\n", total);
            return 0;
          }
        '''

      post = '''
def process(filename):
  src = open(filename, 'a')
  src.write(\'\'\'
    startProfiling();
    run();
    stopProfiling();
    printProfiling();
    print('*ok*');
  \'\'\')
  src.close()
'''

      self.do_run(src, ': __Z6inner1i (5000)\n', post_build=post)

    ### Integration tests

    def test_scriptaclass(self):
        header_filename = os.path.join(self.get_dir(), 'header.h')
        header = '''
          struct ScriptMe {
            int value;
            ScriptMe(int val);
            int getVal(); // XXX Sadly, inlining these will result in LLVM not
                          // producing any code for them (when just building
                          // as a library)
            void mulVal(int mul);
          };
        '''
        h = open(header_filename, 'w')
        h.write(header)
        h.close()

        src = '''
          #include "header.h"

          ScriptMe::ScriptMe(int val) : value(val) { }
          int ScriptMe::getVal() { return value; }
          void ScriptMe::mulVal(int mul) { value *= mul; }
        '''

        # Way 1: use demangler and namespacer

        script_src = '''
          var sme = Module._.ScriptMe.__new__(83);          // malloc(sizeof(ScriptMe)), ScriptMe::ScriptMe(sme, 83) / new ScriptMe(83) (at addr sme)
          Module._.ScriptMe.mulVal(sme, 2);                 // ScriptMe::mulVal(sme, 2)       sme.mulVal(2)
          print('*' + Module._.ScriptMe.getVal(sme) + '*'); 
          _free(sme);
          print('*ok*');
        '''
        post = '''
def process(filename):
  Popen(['python', DEMANGLER, filename], stdout=open(filename + '.tmp', 'w')).communicate()
  Popen(['python', NAMESPACER, filename, filename + '.tmp'], stdout=open(filename + '.tmp2', 'w')).communicate()
  src = open(filename, 'r').read().replace(
    '// {{MODULE_ADDITIONS}',
    'Module["_"] = ' + open(filename + '.tmp2', 'r').read().replace('var ModuleNames = ', '').rstrip() + ';\n\n' + script_src + '\n\n' +
      '// {{MODULE_ADDITIONS}'
  )
  open(filename, 'w').write(src)
'''
        # XXX disable due to possible v8 bug -- self.do_run(src, '*166*\n*ok*', post_build=post)

        # Way 2: use CppHeaderParser

        Settings.RUNTIME_TYPE_INFO = 1

        header = '''
          #include <stdio.h>

          class Parent {
          protected:
            int value;
          public:
            Parent(int val);
            int getVal() { return value; }; // inline should work just fine here, unlike Way 1 before
            void mulVal(int mul);
          };

          class Child1 : public Parent {
          public:
            Child1() : Parent(7) { printf("Child1:%d\\n", value); };
            Child1(int val) : Parent(val*2) { value -= 1; printf("Child1:%d\\n", value); };
            int getValSqr() { return value*value; }
            int getValSqr(int more) { return value*value*more; }
            int getValTimes(int times=1) { return value*times; }
          };

          class Child2 : public Parent {
          public:
            Child2() : Parent(9) { printf("Child2:%d\\n", value); };
            int getValCube() { return value*value*value; }
            static void printStatic() { printf("*static*\\n"); }

            virtual void virtualFunc() { printf("*virtualf*\\n"); }
            virtual void virtualFunc2() { printf("*virtualf2*\\n"); }
            static void runVirtualFunc(Child2 *self) { self->virtualFunc(); };
          private:
            void doSomethingSecret() { printf("security breached!\\n"); }; // we should not be able to do this
          };
        '''
        open(header_filename, 'w').write(header)

        basename = os.path.join(self.get_dir(), 'bindingtest')
        output = Popen([BINDINGS_GENERATOR, basename, header_filename], stdout=PIPE, stderr=self.stderr_redirect).communicate()[0]
        #print output
        assert 'Traceback' not in output, 'Failure in binding generation: ' + output

        src = '''
          #include "header.h"

          Parent::Parent(int val) : value(val) { printf("Parent:%d\\n", val); }
          void Parent::mulVal(int mul) { value *= mul; }

          #include "bindingtest.cpp"
        '''

        post2 = '''
def process(filename):
  script_src_2 = \'\'\'
          var sme = new Parent(42);
          sme.mulVal(2);
          print('*')
          print(sme.getVal());

          print('c1');

          var c1 = new Child1();
          print(c1.getVal());
          c1.mulVal(2);
          print(c1.getVal());
          print(c1.getValSqr());
          print(c1.getValSqr(3));
          print(c1.getValTimes()); // default argument should be 1
          print(c1.getValTimes(2));

          print('c1 v2');

          c1 = new Child1(8); // now with a parameter, we should handle the overloading automatically and properly and use constructor #2
          print(c1.getVal());
          c1.mulVal(2);
          print(c1.getVal());
          print(c1.getValSqr());
          print(c1.getValSqr(3));

          print('c2')

          var c2 = new Child2();
          print(c2.getVal());
          c2.mulVal(2);
          print(c2.getVal());
          print(c2.getValCube());
          var succeeded;
          try {
            succeeded = 0;
            print(c2.doSomethingSecret()); // should fail since private
            succeeded = 1;
          } catch(e) {}
          print(succeeded);
          try {
            succeeded = 0;
            print(c2.getValSqr()); // function from the other class
            succeeded = 1;
          } catch(e) {}
          print(succeeded);
          try {
            succeeded = 0;
            c2.getValCube(); // sanity
            succeeded = 1;
          } catch(e) {}
          print(succeeded);

          Child2.prototype.printStatic(); // static calls go through the prototype

          // virtual function
          c2.virtualFunc();
          Child2.prototype.runVirtualFunc(c2);
          c2.virtualFunc2();

          // extend the class from JS
          var c3 = new Child2;
          customizeVTable(c3, [{
            original: Child2.prototype.virtualFunc,
            replacement: function() {
              print('*js virtualf replacement*');
            }
          }, {
            original: Child2.prototype.virtualFunc2,
            replacement: function() {
              print('*js virtualf2 replacement*');
            }
          }]);
          c3.virtualFunc();
          Child2.prototype.runVirtualFunc(c3);
          c3.virtualFunc2();

          c2.virtualFunc(); // original should remain the same
          Child2.prototype.runVirtualFunc(c2);
          c2.virtualFunc2();

          print('*ok*');
        \'\'\'
  src = open(filename, 'r').read().replace(
    '// {{MODULE_ADDITIONS}',
    open('bindingtest.js').read() + '\\n\\n' + script_src_2 + '\\n\\n' + 
      '// {{MODULE_ADDITIONS}'
  )
  open(filename, 'w').write(src)
'''

        self.do_run(src, '''*
84
c1
Parent:7
Child1:7
7
14
196
588
14
28
c1 v2
Parent:16
Child1:15
15
30
900
2700
c2
Parent:9
Child2:9
9
18
5832
0
0
1
*static*
*virtualf*
*virtualf*
*virtualf2*
Parent:9
Child2:9
*js virtualf replacement*
*js virtualf replacement*
*js virtualf2 replacement*
*virtualf*
*virtualf*
*virtualf2*
*ok*
''', post_build=post2)

    def test_typeinfo(self):
      Settings.RUNTIME_TYPE_INFO = 1
      if Settings.QUANTUM_SIZE != 4: return self.skip('We assume normal sizes in the output here')

      src = '''
        #include<stdio.h>
        struct UserStruct {
          int x;
          char y;
          short z;
        };
        struct Encloser {
          short x;
          UserStruct us;
          int y;
        };
        int main() {
          Encloser e;
          e.us.y = 5;
          printf("*ok:%d*\\n", e.us.y);
          return 0;
        }
      '''

      post = '''
def process(filename):
  src = open(filename, 'r').read().replace(
    '// {{POST_RUN_ADDITIONS}}',
    \'\'\'
      if (Runtime.typeInfo) {
        print('|' + Runtime.typeInfo.UserStruct.fields + '|' + Runtime.typeInfo.UserStruct.flatIndexes + '|');
        var t = Runtime.generateStructInfo(['x', { us: ['x', 'y', 'z'] }, 'y'], 'Encloser')
        print('|' + [t.x, t.us.x, t.us.y, t.us.z, t.y] + '|');
        print('|' + JSON.stringify(Runtime.generateStructInfo(null, 'UserStruct')) + '|');
      } else {
        print('No type info.');
      }
    \'\'\'
  )
  open(filename, 'w').write(src)
'''

      self.do_run(src,
                   '*ok:5*\n|i32,i8,i16|0,4,6|\n|0,4,8,10,12|\n|{"__size__":8,"x":0,"y":4,"z":6}|',
                   post_build=post)

      # Make sure that without the setting, we don't spam the .js with the type info
      Settings.RUNTIME_TYPE_INFO = 0
      self.do_run(src, 'No type info.', post_build=post)

    ### Tests for tools

    def test_safe_heap(self):
      if not Settings.SAFE_HEAP: return self.skip('We need SAFE_HEAP to test SAFE_HEAP')
      if Settings.USE_TYPED_ARRAYS == 2: return self.skip('It is ok to violate the load-store assumption with TA2')
      if Building.LLVM_OPTS: return self.skip('LLVM can optimize away the intermediate |x|')

      src = '''
        #include<stdio.h>
        int main() {
          int *x = new int;
          *x = 20;
          float *y = (float*)x;
          printf("%f\\n", *y);
          printf("*ok*\\n");
          return 0;
        }
      '''

      try:
        self.do_run(src, '*nothingatall*')
      except Exception, e:
        # This test *should* fail, by throwing this exception
        assert 'Assertion failed: Load-store consistency assumption failure!' in str(e), str(e)

      # And we should not fail if we disable checking on that line

      Settings.SAFE_HEAP = 3
      Settings.SAFE_HEAP_LINES = ["src.cpp:7"]

      self.do_run(src, '*ok*')

      # But if we disable the wrong lines, we still fail

      Settings.SAFE_HEAP_LINES = ["src.cpp:99"]

      try:
        self.do_run(src, '*nothingatall*')
      except Exception, e:
        # This test *should* fail, by throwing this exception
        assert 'Assertion failed: Load-store consistency assumption failure!' in str(e), str(e)

      # And reverse the checks with = 2

      Settings.SAFE_HEAP = 2
      Settings.SAFE_HEAP_LINES = ["src.cpp:99"]

      self.do_run(src, '*ok*')

      Settings.SAFE_HEAP = 1

      # Linking multiple files should work too

      module = '''
        #include<stdio.h>
        void callFunc() {
          int *x = new int;
          *x = 20;
          float *y = (float*)x;
          printf("%f\\n", *y);
        }
      '''
      module_name = os.path.join(self.get_dir(), 'module.cpp')
      open(module_name, 'w').write(module)

      main = '''
        #include<stdio.h>
        extern void callFunc();
        int main() {
          callFunc();
          int *x = new int;
          *x = 20;
          float *y = (float*)x;
          printf("%f\\n", *y);
          printf("*ok*\\n");
          return 0;
        }
      '''
      main_name = os.path.join(self.get_dir(), 'main.cpp')
      open(main_name, 'w').write(main)

      Building.emcc(module_name, ['-g'])
      Building.emcc(main_name, ['-g'])
      all_name = os.path.join(self.get_dir(), 'all.bc')
      Building.link([module_name + '.o', main_name + '.o'], all_name)

      try:
        self.do_ll_run(all_name, '*nothingatall*')
      except Exception, e:
        # This test *should* fail, by throwing this exception
        assert 'Assertion failed: Load-store consistency assumption failure!' in str(e), str(e)

      # And we should not fail if we disable checking on those lines

      Settings.SAFE_HEAP = 3
      Settings.SAFE_HEAP_LINES = ["module.cpp:7", "main.cpp:9"]

      self.do_ll_run(all_name, '*ok*')

      # But we will fail if we do not disable exactly what we need to - any mistake leads to error

      for lines in [["module.cpp:22", "main.cpp:9"], ["module.cpp:7", "main.cpp:29"], ["module.cpp:127", "main.cpp:449"], ["module.cpp:7"], ["main.cpp:9"]]:
        Settings.SAFE_HEAP_LINES = lines
        try:
          self.do_ll_run(all_name, '*nothingatall*')
        except Exception, e:
          # This test *should* fail, by throwing this exception
          assert 'Assertion failed: Load-store consistency assumption failure!' in str(e), str(e)

    def test_check_overflow(self):
      Settings.CHECK_OVERFLOWS = 1
      Settings.CORRECT_OVERFLOWS = 0

      src = '''
          #include<stdio.h>
          int main() {
            int t = 77;
            for (int i = 0; i < 30; i++) {
              //t = (t << 2) + t + 1; // This would have worked, since << forces into 32-bit int...
              t = t*5 + 1; // Python lookdict_string has ~the above line, which turns into this one with optimizations...
              printf("%d,%d\\n", t, t & 127);
            }
            return 0;
          }
      '''
      try:
        self.do_run(src, '*nothingatall*')
      except Exception, e:
        # This test *should* fail, by throwing this exception
        assert 'Too many corrections' in str(e), str(e)

    def test_debug(self):
      src = '''
        #include <stdio.h>
        #include <assert.h>

        void checker(int x) {
          x += 20;
          assert(x < 15); // this is line 7!
        }

        int main() {
          checker(10);
          return 0;
        }
      '''
      try:
        post = r'''
def process(filename):
  lines = open(filename, 'r').readlines()
  lines = filter(lambda line: '___assert_fail(' in line or '___assert_func(' in line, lines)
  found_line_num = any(('//@line 7 "' in line) for line in lines)
  found_filename = any(('src.cpp"\n' in line) for line in lines)
  assert found_line_num, 'Must have debug info with the line number'
  assert found_filename, 'Must have debug info with the filename'
'''
        self.do_run(src, '*nothingatall*', post_build=post)
      except Exception, e:
        # This test *should* fail
        assert 'Assertion failed' in str(e), str(e)

    def test_autoassemble(self):
      src = r'''
        #include <stdio.h>

        int main() {
          puts("test\n");
          return 0;
        }
        '''
      dirname = self.get_dir()
      filename = os.path.join(dirname, 'src.cpp')
      self.build(src, dirname, filename)

      new_filename = os.path.join(dirname, 'new.bc')
      shutil.copy(filename + '.o', new_filename)
      Building.emscripten(new_filename, append_ext=False)

      shutil.copy(filename + '.o.js', os.path.join(self.get_dir(), 'new.cpp.o.js'))
      self.do_run(None, 'test\n', basename='new.cpp', no_build=True)

    def test_linespecific(self):
      Settings.CHECK_SIGNS = 0
      Settings.CHECK_OVERFLOWS = 0

      # Signs

      src = '''
        #include <stdio.h>
        #include <assert.h>

        int main()
        {
          int varey = 100;
          unsigned int MAXEY = -1;
          printf("*%d*\\n", varey >= MAXEY); // 100 >= -1? not in unsigned!
        }
      '''

      Settings.CORRECT_SIGNS = 0
      self.do_run(src, '*1*') # This is a fail - we expect 0

      Settings.CORRECT_SIGNS = 1
      self.do_run(src, '*0*') # Now it will work properly

      # And now let's fix just that one line
      Settings.CORRECT_SIGNS = 2
      Settings.CORRECT_SIGNS_LINES = ["src.cpp:9"]
      self.do_run(src, '*0*')

      # Fixing the wrong line should not work
      Settings.CORRECT_SIGNS = 2
      Settings.CORRECT_SIGNS_LINES = ["src.cpp:3"]
      self.do_run(src, '*1*')

      # And reverse the checks with = 2
      Settings.CORRECT_SIGNS = 3
      Settings.CORRECT_SIGNS_LINES = ["src.cpp:3"]
      self.do_run(src, '*0*')
      Settings.CORRECT_SIGNS = 3
      Settings.CORRECT_SIGNS_LINES = ["src.cpp:9"]
      self.do_run(src, '*1*')

      Settings.CORRECT_SIGNS = 0

      # Overflows

      src = '''
        #include<stdio.h>
        int main() {
          int t = 77;
          for (int i = 0; i < 30; i++) {
            t = t*5 + 1;
          }
          printf("*%d,%d*\\n", t, t & 127);
          return 0;
        }
      '''

      correct = '*186854335,63*'
      Settings.CORRECT_OVERFLOWS = 0
      try:
        self.do_run(src, correct)
        raise Exception('UNEXPECTED-PASS')
      except Exception, e:
        assert 'UNEXPECTED' not in str(e), str(e)
        assert 'Expected to find' in str(e), str(e)

      Settings.CORRECT_OVERFLOWS = 1
      self.do_run(src, correct) # Now it will work properly

      # And now let's fix just that one line
      Settings.CORRECT_OVERFLOWS = 2
      Settings.CORRECT_OVERFLOWS_LINES = ["src.cpp:6"]
      self.do_run(src, correct)

      # Fixing the wrong line should not work
      Settings.CORRECT_OVERFLOWS = 2
      Settings.CORRECT_OVERFLOWS_LINES = ["src.cpp:3"]
      try:
        self.do_run(src, correct)
        raise Exception('UNEXPECTED-PASS')
      except Exception, e:
        assert 'UNEXPECTED' not in str(e), str(e)
        assert 'Expected to find' in str(e), str(e)

      # And reverse the checks with = 2
      Settings.CORRECT_OVERFLOWS = 3
      Settings.CORRECT_OVERFLOWS_LINES = ["src.cpp:3"]
      self.do_run(src, correct)
      Settings.CORRECT_OVERFLOWS = 3
      Settings.CORRECT_OVERFLOWS_LINES = ["src.cpp:6"]
      try:
        self.do_run(src, correct)
        raise Exception('UNEXPECTED-PASS')
      except Exception, e:
        assert 'UNEXPECTED' not in str(e), str(e)
        assert 'Expected to find' in str(e), str(e)

      Settings.CORRECT_OVERFLOWS = 0

      # Roundings

      src = '''
        #include <stdio.h>
        #include <assert.h>

        int main()
        {
          TYPE x = -5;
          printf("*%d*", x/2);
          x = 5;
          printf("*%d*", x/2);

          float y = -5.33;
          x = y;
          printf("*%d*", x);
          y = 5.33;
          x = y;
          printf("*%d*", x);

          printf("\\n");
        }
      '''

      if Settings.I64_MODE == 0: # the errors here are very specific to non-i64 mode 1
        Settings.CORRECT_ROUNDINGS = 0
        self.do_run(src.replace('TYPE', 'long long'), '*-3**2**-6**5*') # JS floor operations, always to the negative. This is an undetected error here!
        self.do_run(src.replace('TYPE', 'int'), '*-2**2**-5**5*') # We get these right, since they are 32-bit and we can shortcut using the |0 trick
        self.do_run(src.replace('TYPE', 'unsigned int'), '*-3**2**-6**5*') # We fail, since no fast shortcut for 32-bit unsigneds

      Settings.CORRECT_ROUNDINGS = 1
      Settings.CORRECT_SIGNS = 1 # To be correct here, we need sign corrections as well
      self.do_run(src.replace('TYPE', 'long long'), '*-2**2**-5**5*') # Correct
      self.do_run(src.replace('TYPE', 'int'), '*-2**2**-5**5*') # Correct
      self.do_run(src.replace('TYPE', 'unsigned int'), '*2147483645**2**-5**5*') # Correct
      Settings.CORRECT_SIGNS = 0

      if Settings.I64_MODE == 0: # the errors here are very specific to non-i64 mode 1
        Settings.CORRECT_ROUNDINGS = 2
        Settings.CORRECT_ROUNDINGS_LINES = ["src.cpp:13"] # Fix just the last mistake
        self.do_run(src.replace('TYPE', 'long long'), '*-3**2**-5**5*')
        self.do_run(src.replace('TYPE', 'int'), '*-2**2**-5**5*') # Here we are lucky and also get the first one right
        self.do_run(src.replace('TYPE', 'unsigned int'), '*-3**2**-5**5*') # No such luck here

      # And reverse the check with = 2
      if Settings.I64_MODE == 0: # the errors here are very specific to non-i64 mode 1
        Settings.CORRECT_ROUNDINGS = 3
        Settings.CORRECT_ROUNDINGS_LINES = ["src.cpp:999"]
        self.do_run(src.replace('TYPE', 'long long'), '*-2**2**-5**5*')
        self.do_run(src.replace('TYPE', 'int'), '*-2**2**-5**5*')
        Settings.CORRECT_SIGNS = 1 # To be correct here, we need sign corrections as well
        self.do_run(src.replace('TYPE', 'unsigned int'), '*2147483645**2**-5**5*')
        Settings.CORRECT_SIGNS = 0

    def test_pgo(self):
      Settings.PGO = Settings.CHECK_OVERFLOWS = Settings.CORRECT_OVERFLOWS = Settings.CHECK_SIGNS = Settings.CORRECT_SIGNS = 1

      src = '''
        #include<stdio.h>
        int main() {
          int t = 77;
          for (int i = 0; i < 30; i++) {
            t = t*5 + 1;
          }
          printf("*%d,%d*\\n", t, t & 127);

          int varey = 100;
          unsigned int MAXEY = -1;
          for (int j = 0; j < 2; j++) {
            printf("*%d*\\n", varey >= MAXEY); // 100 >= -1? not in unsigned!
            MAXEY = 1; // So we succeed the second time around
          }
          return 0;
        }
      '''

      def check(output):
        # TODO: check the line #
        assert 'Overflow|src.cpp:6 : 60 hits, %20 failures' in output, 'no indication of Overflow corrections: ' + output
        assert 'UnSign|src.cpp:13 : 6 hits, %17 failures' in output, 'no indication of Sign corrections: ' + output
        return output

      self.do_run(src, '*186854335,63*\n', output_nicerizer=check)

      Settings.PGO = Settings.CHECK_OVERFLOWS = Settings.CORRECT_OVERFLOWS = Settings.CHECK_SIGNS = Settings.CORRECT_SIGNS = 0

      # Now, recompile with the PGO data, and it should work

      pgo_data = read_pgo_data(self.get_stdout_path())

      Settings.CORRECT_SIGNS = 2
      Settings.CORRECT_SIGNS_LINES = pgo_data['signs_lines']
      Settings.CORRECT_OVERFLOWS = 2
      Settings.CORRECT_OVERFLOWS_LINES = pgo_data['overflows_lines']

      self.do_run(src, '*186854335,63*\n')

      # Sanity check: Without PGO, we will fail

      try:
        self.do_run(src, '*186854335,63*\n')
      except:
        pass

    def test_exit_status(self):
      Settings.CATCH_EXIT_CODE = 1

      src = '''
        #include <stdio.h>
        #include <stdlib.h>
        int main()
        {
          printf("hello, world!\\n");
          exit(118); // Unusual exit status to make sure it's working!
        }
      '''
      self.do_run(src, 'hello, world!\nExit Status: 118')


  # Generate tests for everything
  def make_run(fullname, name=-1, compiler=-1, llvm_opts=0, embetter=0, quantum_size=0, typed_arrays=0, emcc_args=None):
    exec('''
class %s(T):
  def tearDown(self):
    super(%s, self).tearDown()
    
  def setUp(self):
    super(%s, self).setUp()

    Building.COMPILER_TEST_OPTS = ['-g']
    os.chdir(self.get_dir()) # Ensure the directory exists and go there
    Building.COMPILER = %r

    self.emcc_args = %s
    if self.emcc_args is not None:
      Settings.load(self.emcc_args)
      Building.LLVM_OPTS = 0
      return

    llvm_opts = %d # 1 is yes, 2 is yes and unsafe
    embetter = %d
    quantum_size = %d
    # TODO: Move much of these to a init() function in shared.py, and reuse that
    Settings.USE_TYPED_ARRAYS = %d
    Settings.INVOKE_RUN = 1
    Settings.RELOOP = 0 # we only do them in the "o2" pass
    Settings.MICRO_OPTS = embetter
    Settings.QUANTUM_SIZE = quantum_size
    Settings.ASSERTIONS = 1-embetter
    Settings.SAFE_HEAP = 1-(embetter and llvm_opts)
    Building.LLVM_OPTS = llvm_opts
    Settings.PGO = 0
    Settings.CHECK_OVERFLOWS = 1-(embetter or llvm_opts)
    Settings.CORRECT_OVERFLOWS = 1-(embetter and llvm_opts)
    Settings.CORRECT_SIGNS = 0
    Settings.CORRECT_ROUNDINGS = 0
    Settings.CORRECT_OVERFLOWS_LINES = CORRECT_SIGNS_LINES = CORRECT_ROUNDINGS_LINES = SAFE_HEAP_LINES = []
    Settings.CHECK_SIGNS = 0 #1-(embetter or llvm_opts)
    Settings.INIT_STACK = 0
    Settings.RUNTIME_TYPE_INFO = 0
    Settings.DISABLE_EXCEPTION_CATCHING = 0
    Settings.PROFILE = 0
    Settings.INCLUDE_FULL_LIBRARY = 0
    Settings.BUILD_AS_SHARED_LIB = 0
    Settings.RUNTIME_LINKED_LIBS = []
    Settings.CATCH_EXIT_CODE = 0
    Settings.EMULATE_UNALIGNED_ACCESSES = int(Settings.USE_TYPED_ARRAYS == 2 and Building.LLVM_OPTS == 2)
    Settings.DOUBLE_MODE = 1 if Settings.USE_TYPED_ARRAYS and Building.LLVM_OPTS == 0 else 0
    if Settings.USE_TYPED_ARRAYS == 2:
      Settings.I64_MODE = 1
      Settings.SAFE_HEAP = 1 # only checks for alignment problems, which is very important with unsafe opts
    else:
      Settings.I64_MODE = 0

    Building.pick_llvm_opts(3, safe=Building.LLVM_OPTS != 2)

TT = %s
''' % (fullname, fullname, fullname, compiler, str(emcc_args), llvm_opts, embetter, quantum_size, typed_arrays, fullname))
    return TT

  # Make one run with the defaults
  exec('default = make_run("default", compiler=CLANG, emcc_args=[])')

  # Make one run with -O1, with safe heap
  exec('o1 = make_run("o1", compiler=CLANG, emcc_args=["-O1", "-s", "SAFE_HEAP=1"])')

  # Make one run with -O2, but without closure (we enable closure in specific tests, otherwise on everything it is too slow)
  exec('o2 = make_run("o2", compiler=CLANG, emcc_args=["-O2", "--closure", "0"])')

  # Make custom runs with various options
  for compiler, quantum, embetter, typed_arrays, llvm_opts in [
    (CLANG, 1, 1, 0, 0),
    (CLANG, 1, 1, 1, 1),
    (CLANG, 4, 0, 0, 0),
    (CLANG, 4, 0, 0, 1),
    (CLANG, 4, 1, 1, 0),
    (CLANG, 4, 1, 1, 1),
  ]:
    fullname = 's_%d_%d%s%s' % (
      llvm_opts, embetter, '' if quantum == 4 else '_q' + str(quantum), '' if typed_arrays in [0, 1] else '_t' + str(typed_arrays)
    )
    exec('%s = make_run(fullname, %r,%r,%d,%d,%d,%d)' % (fullname, fullname, compiler, llvm_opts, embetter, quantum, typed_arrays))

  del T # T is just a shape for the specific subclasses, we don't test it itself

  class other(RunnerCore):
    def test_emcc(self):
      def clear():
        for name in os.listdir(self.get_dir()):
          try_delete(name)

      for compiler in [EMCC, EMXX]:
        shortcompiler = os.path.basename(compiler)
        suffix = '.c' if compiler == EMCC else '.cpp'

        # --version
        output = Popen([compiler, '--version'], stdout=PIPE, stderr=PIPE).communicate()
        self.assertContained('''emcc (Emscripten GCC-like replacement) 2.0
Copyright (C) 2011 the Emscripten authors.
This is free and open source software under the MIT license.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
''', output[0], output[1])

        # --help
        output = Popen([compiler, '--help'], stdout=PIPE, stderr=PIPE).communicate()
        self.assertContained('''%s [options] file...

Most normal gcc/g++ options will work, for example:
  --help                   Display this information
  --version                Display compiler version information

Options that are modified or new in %s include:
  -O0                      No optimizations (default)
''' % (shortcompiler, shortcompiler), output[0], output[1])

        # emcc src.cpp ==> writes a.out.js
        clear()
        output = Popen([compiler, path_from_root('tests', 'hello_world' + suffix)], stdout=PIPE, stderr=PIPE).communicate()
        assert len(output[0]) == 0, output[0]
        assert os.path.exists('a.out.js'), '\n'.join(output)
        self.assertContained('hello, world!', run_js('a.out.js'))

        # properly report source code errors, and stop there
        clear()
        assert not os.path.exists('a.out.js')
        output = Popen([compiler, path_from_root('tests', 'hello_world_error' + suffix)], stdout=PIPE, stderr=PIPE).communicate()
        assert not os.path.exists('a.out.js'), 'compilation failed, so no output file is expected'
        assert len(output[0]) == 0, output[0]
        self.assertNotContained('IOError', output[1]) # no python stack
        self.assertNotContained('Traceback', output[1]) # no python stack
        self.assertContained('error: invalid preprocessing directive', output[1])
        self.assertContained('''error: use of undeclared identifier 'cheez''', output[1])
        self.assertContained('2 errors generated', output[1])
        assert output[1].split('2 errors generated.')[1].replace('\n', '') == 'emcc: compiler frontend failed to generate LLVM bitcode, halting'

        # emcc src.cpp -c    and   emcc src.cpp -o src.[o|bc] ==> should give a .bc file
        #      regression check: -o js should create "js", with bitcode content
        for args in [['-c'], ['-o', 'src.o'], ['-o', 'src.bc'], ['-o', 'js']]:
          target = args[1] if len(args) == 2 else 'hello_world.o'
          clear()
          output = Popen([compiler, path_from_root('tests', 'hello_world' + suffix)] + args, stdout=PIPE, stderr=PIPE).communicate()
          assert len(output[0]) == 0, output[0]
          assert os.path.exists(target), 'Expected %s to exist since args are %s : %s' % (target, str(args), '\n'.join(output))
          self.assertContained('hello, world!', self.run_llvm_interpreter([target]))

        # emcc src.ll ==> generates .js
        clear()
        output = Popen([compiler, path_from_root('tests', 'hello_world.ll')], stdout=PIPE, stderr=PIPE).communicate()
        assert len(output[0]) == 0, output[0]
        assert os.path.exists('a.out.js'), '\n'.join(output)
        self.assertContained('hello, world!', run_js('a.out.js'))

        # emcc [..] -o [path] ==> should work with absolute paths
        try:
          os.mkdir('a_dir')
          os.chdir('a_dir')
          os.mkdir('b_dir')
          for path in [os.path.abspath(os.path.join('..', 'file1.js')), os.path.join('b_dir', 'file2.js')]:
            clear()
            output = Popen([compiler, path_from_root('tests', 'hello_world.ll'), '-o', path], stdout=PIPE, stderr=PIPE).communicate()
            assert os.path.exists(path), path + ' does not exist; ' + '\n'.join(output)
            self.assertContained('hello, world!', run_js(path))
        finally:
          os.chdir(self.get_dir())
          try:
            shutil.rmtree('a_dir')
          except:
            pass

        # dlmalloc. dlmalloc is special in that it is the only part of libc that is (1) hard to write well, and
        # very speed-sensitive. So we do not implement it in JS in library.js, instead we compile it from source
        for source, has_malloc in [('hello_world' + suffix, False), ('hello_malloc.cpp', True)]:
          clear()
          output = Popen([compiler, path_from_root('tests', source)], stdout=PIPE, stderr=PIPE).communicate()
          assert os.path.exists('a.out.js'), '\n'.join(output)
          self.assertContained('hello, world!', run_js('a.out.js'))
          generated = open('a.out.js').read()
          assert ('function _malloc(bytes) {' in generated) == (not has_malloc), 'If malloc is needed, it should be there, if not not'

        # Optimization: emcc src.cpp -o something.js [-Ox]. -O0 is the same as not specifying any optimization setting
        for params, opt_level, bc_params, closure, has_malloc in [ # bc params are used after compiling to bitcode
          (['-o', 'something.js'],                          0, None, 0, 1),
          (['-o', 'something.js', '-O0'],                   0, None, 0, 0),
          (['-o', 'something.js', '-O1'],                   1, None, 0, 0),
          (['-o', 'something.js', '-O1', '--closure', '1'], 1, None, 1, 0),
          (['-o', 'something.js', '-O2'],                   2, None, 1, 1),
          (['-o', 'something.js', '-O2', '--closure', '0'], 2, None, 0, 0),
          (['-o', 'something.js', '-O3'],                   3, None, 1, 1),
          (['-o', 'something.js', '-O3', '--closure', '0'], 3, None, 0, 0),
          # and, test compiling to bitcode first
          (['-o', 'something.bc'], 0, [],      0, 0),
          (['-o', 'something.bc'], 0, ['-O0'], 0, 0),
          (['-o', 'something.bc'], 1, ['-O1'], 0, 0),
          (['-o', 'something.bc'], 2, ['-O2'], 1, 0),
          (['-o', 'something.bc'], 3, ['-O3'], 1, 0),
        ]:
          #print params, opt_level, bc_params, closure
          clear()
          output = Popen([compiler, path_from_root('tests', 'hello_world_loop' + ('_malloc' if has_malloc else '') + '.cpp')] + params,
                         stdout=PIPE, stderr=PIPE).communicate()
          assert len(output[0]) == 0, output[0]
          if bc_params is not None:
            assert os.path.exists('something.bc'), output[1]
            output = Popen([compiler, 'something.bc', '-o', 'something.js'] + bc_params, stdout=PIPE, stderr=PIPE).communicate()
          assert os.path.exists('something.js'), output[1]
          assert ('Warning: The relooper optimization can be very slow.' in output[1]) == (opt_level >= 2), 'relooper warning should appear in opt >= 2'
          assert ('Warning: Applying some potentially unsafe optimizations!' in output[1]) == (opt_level >= 3), 'unsafe warning should appear in opt >= 3'
          self.assertContained('hello, world!', run_js('something.js'))

          # Verify optimization level etc. in the generated code
          # XXX these are quite sensitive, and will need updating when code generation changes
          generated = open('something.js').read() # TODO: parse out the _main function itself, not support code, if the tests below need that some day
          assert 'new Uint16Array' in generated and 'new Uint32Array' in generated, 'typed arrays 2 should be used by default'
          assert 'SAFE_HEAP' not in generated, 'safe heap should not be used by default'
          assert ': while(' not in generated, 'when relooping we also js-optimize, so there should be no labelled whiles'
          if closure:
            assert 'Module._main = ' in generated, 'closure compiler should have been run'
          else:
            # closure has not been run, we can do some additional checks. TODO: figure out how to do these even with closure
            assert 'Module._main = ' not in generated, 'closure compiler should not have been run'
            # XXX find a way to test this: assert ('& 255' in generated or '&255' in generated) == (opt_level <= 2), 'corrections should be in opt <= 2'
            assert ('(__label__)' in generated) == (opt_level <= 1), 'relooping should be in opt >= 2'
            assert ('assert(STACKTOP < STACK_MAX' in generated) == (opt_level == 0), 'assertions should be in opt == 0'
            assert 'var $i;' in generated, 'micro opts should always be on'
            if opt_level >= 1: assert 'HEAP8[HEAP32[' in generated, 'eliminator should create compound expressions, and fewer one-time vars'
            assert ('_puts(' in generated) == (opt_level >= 1), 'with opt >= 1, llvm opts are run and they should optimize printf to puts'
            assert ('function _malloc(bytes) {' in generated) == (not has_malloc), 'If malloc is needed, it should be there, if not not'

        # emcc -s RELOOP=1 src.cpp ==> should pass -s to emscripten.py. --typed-arrays is a convenient alias for -s USE_TYPED_ARRAYS
        for params, test, text in [
          (['-s', 'USE_TYPED_ARRAYS=0'], lambda generated: 'new Int32Array' not in generated, 'disable typed arrays'),
          (['-s', 'USE_TYPED_ARRAYS=1'], lambda generated: 'IHEAPU = ' in generated, 'typed arrays 1 selected'),
          ([], lambda generated: 'Module["_dump"]' not in generated, 'dump is not exported by default'),
          (['-s', 'EXPORTED_FUNCTIONS=["_main", "_dump"]'], lambda generated: 'Module["_dump"]' in generated, 'dump is now exported'),
          (['--typed-arrays', '0'], lambda generated: 'new Int32Array' not in generated, 'disable typed arrays'),
          (['--typed-arrays', '1'], lambda generated: 'IHEAPU = ' in generated, 'typed arrays 1 selected'),
          (['--typed-arrays', '2'], lambda generated: 'new Uint16Array' in generated and 'new Uint32Array' in generated, 'typed arrays 2 selected'),
          (['--llvm-opts', '1'], lambda generated: '_puts(' in generated, 'llvm opts requested'),
        ]:
          clear()
          output = Popen([compiler, path_from_root('tests', 'hello_world_loop.cpp'), '-o', 'a.out.js'] + params, stdout=PIPE, stderr=PIPE).communicate()
          assert len(output[0]) == 0, output[0]
          assert os.path.exists('a.out.js'), '\n'.join(output)
          self.assertContained('hello, world!', run_js('a.out.js'))
          assert test(open('a.out.js').read()), text

        # Compiling two source files into a final JS.
        for args, target in [([], 'a.out.js'), (['-o', 'combined.js'], 'combined.js')]:
          clear()
          output = Popen([compiler, path_from_root('tests', 'twopart_main.cpp'), path_from_root('tests', 'twopart_side.cpp')] + args,
                         stdout=PIPE, stderr=PIPE).communicate()
          assert len(output[0]) == 0, output[0]
          assert os.path.exists(target), '\n'.join(output)
          self.assertContained('side got: hello from main, over', run_js(target))

          # Compiling two files with -c will generate separate .bc files
          clear()
          output = Popen([compiler, path_from_root('tests', 'twopart_main.cpp'), path_from_root('tests', 'twopart_side.cpp'), '-c'] + args,
                         stdout=PIPE, stderr=PIPE).communicate()
          if '-o' in args:
            # specifying -o and -c is an error
            assert 'fatal error' in output[1], output[1]
            continue

          assert os.path.exists('twopart_main.o'), '\n'.join(output)
          assert os.path.exists('twopart_side.o'), '\n'.join(output)
          assert not os.path.exists(target), 'We should only have created bitcode here: ' + '\n'.join(output)

          # Compiling one of them alone is expected to fail
          output = Popen([compiler, 'twopart_main.o'] + args, stdout=PIPE, stderr=PIPE).communicate()
          assert os.path.exists(target), '\n'.join(output)
          #print '\n'.join(output)
          self.assertContained('is not a function', run_js(target, stderr=STDOUT))
          try_delete(target)

          # Combining those bc files into js should work
          output = Popen([compiler, 'twopart_main.o', 'twopart_side.o'] + args, stdout=PIPE, stderr=PIPE).communicate()
          assert os.path.exists(target), '\n'.join(output)
          self.assertContained('side got: hello from main, over', run_js(target))

          # Combining bc files into another bc should also work
          try_delete(target)
          assert not os.path.exists(target)
          output = Popen([compiler, 'twopart_main.o', 'twopart_side.o', '-o', 'combined.bc'] + args, stdout=PIPE, stderr=PIPE).communicate()
          assert os.path.exists('combined.bc'), '\n'.join(output)
          self.assertContained('side got: hello from main, over', self.run_llvm_interpreter(['combined.bc']))

        # --js-transform <transform>
        clear()
        trans = os.path.join(self.get_dir(), 't.py')
        trans_file = open(trans, 'w')
        trans_file.write('''
import sys
f = open(sys.argv[1], 'w')
f.write('transformed!')
f.close()
''')
        trans_file.close()
        output = Popen([compiler, path_from_root('tests', 'hello_world' + suffix), '--js-transform', 'python t.py'], stdout=PIPE, stderr=PIPE).communicate()
        assert open('a.out.js').read() == 'transformed!', 'Transformed output must be as expected'

      # TODO: Add in files test a clear example of using disablePermissions, and link to it from the wiki
      # TODO: test normal project linking, static and dynamic: get_library should not need to be told what to link!
      # TODO: deprecate llvm optimizations, dlmalloc, etc. in emscripten.py.

      # Finally, do some web browser tests
      def run_browser(html_file, message):
        webbrowser.open_new(html_file)
        print 'A web browser window should have opened a page containing the results of a part of this test.'
        print 'You need to manually look at the page to see that it works ok: ' + message
        print '(sleeping for a bit to keep the directory alive for the web browser..)'
        time.sleep(5)
        print '(moving on..)'

      # test HTML generation.
      clear()
      output = Popen([EMCC, path_from_root('tests', 'hello_world_sdl.cpp'), '-o', 'something.html'], stdout=PIPE, stderr=PIPE).communicate()
      assert len(output[0]) == 0, output[0]
      assert os.path.exists('something.html'), output
      run_browser('something.html', 'You should see "hello, world!" and a colored cube.')

      # And test running in a web worker
      clear()
      output = Popen([EMCC, path_from_root('tests', 'hello_world_worker.cpp'), '-o', 'worker.js'], stdout=PIPE, stderr=PIPE).communicate()
      assert len(output[0]) == 0, output[0]
      assert os.path.exists('worker.js'), output
      self.assertContained('you should not see this text when in a worker!', run_js('worker.js')) # code should run standalone
      html_file = open('main.html', 'w')
      html_file.write('''
        <html>
        <body>
          <script>
            var worker = new Worker('worker.js');
            worker.onmessage = function(event) {
              document.write("<hr>Called back by the worker: " + event.data + "<br><hr>");
            };
          </script>
        </body>
        </html>
      ''')
      html_file.close()
      run_browser('main.html', 'You should see that the worker was called, and said "hello from worker!"')

    def test_eliminator(self):
      input = open(path_from_root('tools', 'eliminator', 'eliminator-test.js')).read()
      expected = open(path_from_root('tools', 'eliminator', 'eliminator-test-output.js')).read()
      output = Popen([COFFEESCRIPT, VARIABLE_ELIMINATOR], stdin=PIPE, stdout=PIPE).communicate(input)[0]
      self.assertIdentical(expected, output)

    def test_js_optimizer(self):
      for input, expected, passes in [
        (open(path_from_root('tools', 'test-js-optimizer.js')).read(), open(path_from_root('tools', 'test-js-optimizer-output.js')).read(),
         ['hoistMultiples', 'loopOptimizer', 'unGlobalize', 'removeAssignsToUndefined', 'simplifyExpressionsPre', 'simplifyExpressionsPost']),
        (open(path_from_root('tools', 'test-js-optimizer-t2c.js')).read(), open(path_from_root('tools', 'test-js-optimizer-t2c-output.js')).read(),
         ['simplifyExpressionsPre', 'optimizeShiftsConservative']),
        (open(path_from_root('tools', 'test-js-optimizer-t2.js')).read(), open(path_from_root('tools', 'test-js-optimizer-t2-output.js')).read(),
         ['simplifyExpressionsPre', 'optimizeShiftsAggressive']),
      ]:
        output = Popen([NODE_JS, JS_OPTIMIZER] + passes, stdin=PIPE, stdout=PIPE).communicate(input)[0]
        self.assertIdentical(expected, output.replace('\n\n', '\n'))

elif 'benchmark' in str(sys.argv):
  # Benchmarks. Run them with argument |benchmark|. To run a specific test, do
  # |benchmark.test_X|.

  fingerprint = [time.asctime()]
  try:
    fingerprint.append('em: ' + Popen(['git', 'show'], stdout=PIPE).communicate()[0].split('\n')[0])
  except:
    pass
  try:
    d = os.getcwd()
    os.chdir(os.path.expanduser('~/Dev/mozilla-central'))
    fingerprint.append('sm: ' + filter(lambda line: 'changeset' in line, 
                                       Popen(['hg', 'tip'], stdout=PIPE).communicate()[0].split('\n'))[0])
  except:
    pass
  finally:
    os.chdir(d)
  print 'Running Emscripten benchmarks... [ %s ]' % ' | '.join(fingerprint)

  sys.argv = filter(lambda x: x != 'benchmark', sys.argv)

  assert(os.path.exists(CLOSURE_COMPILER))

  try:
    index = SPIDERMONKEY_ENGINE.index("options('strict')")
    SPIDERMONKEY_ENGINE = SPIDERMONKEY_ENGINE[:index-1] + SPIDERMONKEY_ENGINE[index+1:] # closure generates non-strict
  except:
    pass

  Building.COMPILER = CLANG

  # Pick the JS engine to benchmark. If you specify one, it will be picked. For example, python tests/runner.py benchmark SPIDERMONKEY_ENGINE
  JS_ENGINE = JS_ENGINES[0]
  for i in range(1, len(sys.argv)):
    arg = sys.argv[i]
    if not arg.startswith('benchmark.test_'):
      JS_ENGINE = eval(arg)
      sys.argv[i] = None
  sys.argv = filter(lambda arg: arg is not None, sys.argv)
  print 'Benchmarking JS engine:', JS_ENGINE

  Building.COMPILER_TEST_OPTS = []

  TEST_REPS = 10
  TOTAL_TESTS = 7

  tests_done = 0
  total_times = map(lambda x: 0., range(TOTAL_TESTS))
  total_native_times = map(lambda x: 0., range(TOTAL_TESTS))

  class benchmark(RunnerCore):
    def print_stats(self, times, native_times, last=False):
      mean = sum(times)/len(times)
      squared_times = map(lambda x: x*x, times)
      mean_of_squared = sum(squared_times)/len(times)
      std = math.sqrt(mean_of_squared - mean*mean)
      sorted_times = times[:]
      sorted_times.sort()
      median = sum(sorted_times[len(sorted_times)/2 - 1:len(sorted_times)/2 + 1])/2

      mean_native = sum(native_times)/len(native_times)
      squared_native_times = map(lambda x: x*x, native_times)
      mean_of_squared_native = sum(squared_native_times)/len(native_times)
      std_native = math.sqrt(mean_of_squared_native - mean_native*mean_native)
      sorted_native_times = native_times[:]
      sorted_native_times.sort()
      median_native = sum(sorted_native_times[len(sorted_native_times)/2 - 1:len(sorted_native_times)/2 + 1])/2

      final = mean / mean_native

      if last:
        norm = 0
        for i in range(len(times)):
          norm += times[i]/native_times[i]
        norm /= len(times)
        print
        print '  JavaScript: %.3f    Native: %.3f   Ratio:  %.3f  Normalized ratio: %.3f' % (mean, mean_native, final, norm)
        return

      print
      print '   JavaScript: mean: %.3f (+-%.3f) secs  median: %.3f  range: %.3f-%.3f  (noise: %3.3f%%)  (%d runs)' % (mean, std, median, min(times), max(times), 100*std/mean, TEST_REPS)
      print '   Native    : mean: %.3f (+-%.3f) secs  median: %.3f  range: %.3f-%.3f  (noise: %3.3f%%)  JS is %.2f X slower' % (mean_native, std_native, median_native, min(native_times), max(native_times), 100*std_native/mean_native, final)

    def do_benchmark(self, src, args=[], expected_output='FAIL', emcc_args=[]):
      dirname = self.get_dir()
      filename = os.path.join(dirname, 'src.cpp')
      f = open(filename, 'w')
      f.write(src)
      f.close()
      final_filename = os.path.join(dirname, 'src.js')

      try_delete(final_filename)
      output = Popen([EMCC, filename, '-O3', '-s', 'USE_TYPED_ARRAYS=1', '-s', 'QUANTUM_SIZE=1',
                      '-s', 'TOTAL_MEMORY=100*1024*1024', '-s', 'FAST_MEMORY=10*1024*1024',
                      '-o', final_filename] + emcc_args, stdout=PIPE, stderr=self.stderr_redirect).communicate()
      assert os.path.exists(final_filename), 'Failed to compile file: ' + '\n'.join(output)

      # Run JS
      global total_times, tests_done
      times = []
      for i in range(TEST_REPS):
        start = time.time()
        js_output = self.run_generated_code(JS_ENGINE, final_filename, args, check_timeout=False)
        curr = time.time()-start
        times.append(curr)
        total_times[tests_done] += curr
        if i == 0:
          # Sanity check on output
          self.assertContained(expected_output, js_output)

      # Run natively
      self.build_native(filename)
      global total_native_times
      native_times = []
      for i in range(TEST_REPS):
        start = time.time()
        self.run_native(filename, args)
        curr = time.time()-start
        native_times.append(curr)
        total_native_times[tests_done] += curr

      self.print_stats(times, native_times)

      tests_done += 1
      if tests_done == TOTAL_TESTS:
        print 'Total stats:',
        self.print_stats(total_times, total_native_times, last=True)

    def test_primes(self):
      src = '''
        #include<stdio.h>
        #include<math.h>
        int main() {
          int primes = 0, curri = 2;
          while (primes < 100000) {
            int ok = true;
            for (int j = 2; j < sqrtf(curri); j++) {
              if (curri % j == 0) {
                ok = false;
                break;
              }
            }
            if (ok) {
              primes++;
            }
            curri++;
          }
          printf("lastprime: %d.\\n", curri-1);
          return 1;
        }
      '''
      self.do_benchmark(src, [], 'lastprime: 1297001.')

    def test_memops(self):
      src = '''
        #include<stdio.h>
        #include<string.h>
        #include<stdlib.h>
        int main() {
          int N = 1024*1024;
          int M = 190;
          int final = 0;
          char *buf = (char*)malloc(N);
          for (int t = 0; t < M; t++) {
            for (int i = 0; i < N; i++)
              buf[i] = (i + final)%256;
            for (int i = 0; i < N; i++)
              final += buf[i] & 1;
            final = final % 1000;
          }
          printf("final: %d.\\n", final);
          return 1;
        }      
      '''
      self.do_benchmark(src, [], 'final: 720.')

    def zzztest_copy(self):
      src = r'''
        #include<stdio.h>
        struct vec {
          int x, y, z;
          int r, g, b;
          vec(int x_, int y_, int z_, int r_, int g_, int b_) : x(x_), y(y_), z(z_), r(r_), g(g_), b(b_) {}
          static vec add(vec a, vec b) {
            return vec(a.x+b.x, a.y+b.y, a.z+b.z, a.r+b.r, a.g+b.g, a.b+b.b);
          }
          void norm() {
            x %= 1024;
            y %= 1024;
            z %= 1024;
            r %= 1024;
            b %= 1024;
            g %= 1024;
          }
          int sum() { return x + y + z + r + g + b; }
        };
        int main() {
          int total = 0;
          for (int i = 0; i < 2500; i++) {
            for (int j = 0; j < 1000; j++) {
              vec c(i, i+i%10, j*2, i%255, j%120, i%15);
              vec d(j+i%10, j*2, j%255, i%120, j%15, j);
              vec e = c;
              c.norm();
              d.norm();
              vec f = vec::add(c, d);
              f = vec::add(e, f);
              f.norm();
              f = vec::add(d, f);
              total += f.sum() % 100;
              total %= 10240;
            }
          }
          printf("sum:%d\n", total);
          return 1;
        }      
      '''
      self.do_benchmark(src, [], 'sum:3588\n', emcc_args=['-s', 'QUANTUM_SIZE=4', '-s', 'USE_TYPED_ARRAYS=2'])

    def test_fannkuch(self):
      src = open(path_from_root('tests', 'fannkuch.cpp'), 'r').read()
      self.do_benchmark(src, ['10'], 'Pfannkuchen(10) = 38.')

    def test_corrections(self):
      src = r'''
        #include<stdio.h>
        #include<math.h>
        int main() {
          int N = 4100;
          int M = 4100;
          unsigned int f = 0;
          unsigned short s = 0;
          for (int t = 0; t < M; t++) {
            for (int i = 0; i < N; i++) {
              f += i / ((t % 5)+1);
              if (f > 1000) f /= (t % 3)+1;
              if (i % 4 == 0) f += sqrtf(i) * (i % 8 == 0 ? 1 : -1);
              s += (short(f)*short(f)) % 256;
            }
          }
          printf("final: %d:%d.\n", f, s);
          return 1;
        }      
      '''
      self.do_benchmark(src, [], 'final: 826:14324.', emcc_args=['-s', 'CORRECT_SIGNS=1', '-s', 'CORRECT_OVERFLOWS=1', '-s', 'CORRECT_ROUNDINGS=1'])

    def fasta(self, emcc_args=[]):
      src = open(path_from_root('tests', 'fasta.cpp'), 'r').read()
      self.do_benchmark(src, ['2100000'], '''GGCCGGGCGCGGTGGCTCACGCCTGTAATCCCAGCACTTTGGGAGGCCGAGGCGGGCGGA\nTCACCTGAGGTCAGGAGTTCGAGACCAGCCTGGCCAACATGGTGAAACCCCGTCTCTACT\nAAAAATACAAAAATTAGCCGGGCGTGGTGGCGCGCGCCTGTAATCCCAGCTACTCGGGAG\nGCTGAGGCAGGAGAATCGCTTGAACCCGGGAGGCGGAGGTTGCAGTGAGCCGAGATCGCG\nCCACTGCACTCCAGCCTGGGCGACAGAGCGAGACTCCGTCTCAAAAAGGCCGGGCGCGGT\nGGCTCACGCCTGTAATCCCAGCACTTTGGGAGGCCGAGGCGGGCGGATCACCTGAGGTCA\nGGAGTTCGAGACCAGCCTGGCCAACATGGTGAAACCCCGTCTCTACTAAAAATACAAAAA\nTTAGCCGGGCGTGGTGGCGCGCGCCTGTAATCCCAGCTACTCGGGAGGCTGAGGCAGGAG\nAATCGCTTGAACCCGGGAGGCGGAGGTTGCAGTGAGCCGAGATCGCGCCACTGCACTCCA\nGCCTGGGCGA''',
                        emcc_args=emcc_args)

    def test_fasta(self):
      self.fasta()

    def zzztest_fasta_t2(self):
      self.fasta(emcc_args=['-s', 'USE_TYPED_ARRAYS=2', '-s', 'QUANTUM_SIZE=4'])

    def test_skinning(self):
      src = open(path_from_root('tests', 'skinning_test_no_simd.cpp'), 'r').read()
      self.do_benchmark(src, ['10000', '1000'], 'blah=0.000000')

    def test_dlmalloc(self):
      # XXX This seems to have regressed slightly with emcc. Are -g and the signs lines passed properly?
      src = open(path_from_root('src', 'dlmalloc.c'), 'r').read() + '\n\n\n' + open(path_from_root('tests', 'dlmalloc_test.c'), 'r').read()
      self.do_benchmark(src, ['400', '400'], '*400,0*', emcc_args=['-g', '-s', 'CORRECT_SIGNS=2', '-s', 'CORRECT_SIGNS_LINES=[4820, 4195, 4250, 4203, 4209, 4239, 4231]'])

elif 'sanity' in str(sys.argv):

  # Run some sanity checks on the test runner and emcc.

  sys.argv = filter(lambda x: x != 'sanity', sys.argv)

  print
  print 'Running sanity checks.'
  print 'WARNING: This will modify ~/.emscripten, and in theory can break it although it should be restored properly. A backup will be saved in ~/.emscripten_backup'
  print

  assert os.path.exists(CONFIG_FILE), 'To run these tests, we need a (working!) ~/.emscripten file to already exist'

  shutil.copyfile(CONFIG_FILE, CONFIG_FILE + '_backup')
  def restore():
    shutil.copyfile(CONFIG_FILE + '_backup', CONFIG_FILE)

  SANITY_FILE = CONFIG_FILE + '_sanity'

  def wipe():
    try_delete(CONFIG_FILE)
    try_delete(SANITY_FILE)

  commands = [[EMCC], ['python', path_from_root('tests', 'runner.py'), 'blahblah']]

  class sanity(RunnerCore):
    def setUp(self):
      wipe()

    def tearDown(self):
      restore()

    def do(self, command):
      if type(command) is not list:
        command = [command]

      return Popen(command, stdout=PIPE, stderr=STDOUT).communicate()[0]

    def check_working(self, command, expected=None):
      if type(command) is not list:
        command = [command]
      if expected is None:
        if command[0] == EMCC:
          expected = 'no input files'
        else:
          expected = "has no attribute 'blahblah'"

      output = self.do(command)
      self.assertContained(expected, output)
      return output

    def test_aaa_normal(self): # this should be the very first thing that runs. if this fails, everything else is irrelevant!
      for command in commands:
        # Your existing ~/.emscripten should work!
        restore()
        self.check_working(command)

    def test_firstrun(self):
      for command in commands:
        wipe()
        output = self.do(command)

        self.assertContained('Welcome to Emscripten!', output)
        self.assertContained('This is the first time any of the Emscripten tools has been run.', output)
        self.assertContained('A settings file has been copied to ~/.emscripten, at absolute path: %s' % CONFIG_FILE, output)
        self.assertContained('Please edit that file and change the paths to fit your system', output)
        self.assertContained('make sure LLVM_ROOT and NODE_JS are correct', output)
        self.assertContained('This command will now exit. When you are done editing those paths, re-run it.', output)
        assert output.replace('\n', '').endswith('===='), 'We should have stopped: ' + output
        assert (open(CONFIG_FILE).read() == open(path_from_root('settings.py')).read()), 'Settings should be copied from settings.py'

        # Second run, with bad ~/.emscripten
        for settings in ['blah', 'LLVM_ROOT="blah"; JS_ENGINES=[]; COMPILER_ENGINE=NODE_JS=SPIDERMONKEY_ENGINE=[]']:
          f = open(CONFIG_FILE, 'w')
          f.write(settings)
          f.close()
          output = self.do(command)

          if 'LLVM_ROOT' not in settings:
            self.assertContained('Error in evaluating ~/.emscripten', output)
          else:
            self.assertContained('FATAL', output) # sanity check should fail

    def test_closure_compiler(self):
      CLOSURE_FATAL = 'fatal: Closure compiler'
      CLOSURE_WARNING = 'WARNING: Closure compiler'

      # Sanity check should find closure
      restore()
      output = self.check_working(EMCC)
      self.assertNotContained(CLOSURE_FATAL, output)
      self.assertNotContained(CLOSURE_WARNING, output)

      # Append a bad path for closure, will warn
      f = open(CONFIG_FILE, 'a')
      f.write('CLOSURE_COMPILER = "/tmp/nowhere/nothingtoseehere/kjadsfkjwelkjsdfkqgas/nonexistent.txt"\n')
      f.close()
      output = self.check_working(EMCC, CLOSURE_WARNING)

      # And if you actually try to use the bad path, will be fatal
      f = open(CONFIG_FILE, 'a')
      f.write('CLOSURE_COMPILER = "/tmp/nowhere/nothingtoseehere/kjadsfkjwelkjsdfkqgas/nonexistent.txt"\n')
      f.close()
      output = self.check_working([EMCC, '-O2', 'tests/hello_world.cpp'], CLOSURE_FATAL)

      # With a working path, all is well
      restore()
      try_delete('a.out.js')
      output = self.check_working([EMCC, '-O2', 'tests/hello_world.cpp'], 'The relooper optimization can be very slow')
      assert os.path.exists('a.out.js')

    def test_emcc(self):
      def mtime(filename):
        return os.stat(filename).st_mtime

      SANITY_MESSAGE = 'Emscripten: Running sanity checks'
      SANITY_FAIL_MESSAGE = 'sanity check failed to run'

      # emcc should check sanity if no ~/.emscripten_sanity
      restore()
      time.sleep(0.1)
      assert not os.path.exists(SANITY_FILE) # restore is just the settings, not the sanity
      output = self.check_working(EMCC)
      self.assertContained(SANITY_MESSAGE, output)
      assert os.path.exists(SANITY_FILE) # EMCC should have checked sanity successfully
      assert mtime(SANITY_FILE) >= mtime(CONFIG_FILE)
      self.assertNotContained(SANITY_FAIL_MESSAGE, output)

      # emcc run again should not sanity check, because the sanity file is newer
      output = self.check_working(EMCC)
      self.assertNotContained(SANITY_MESSAGE, output)
      self.assertNotContained(SANITY_FAIL_MESSAGE, output)

      # But the test runner should
      output = self.check_working(commands[1])
      self.assertContained(SANITY_MESSAGE, output)
      self.assertNotContained(SANITY_FAIL_MESSAGE, output)

      # Make sure the test runner didn't do anything to the setup
      output = self.check_working(EMCC)
      self.assertNotContained(SANITY_MESSAGE, output)
      self.assertNotContained(SANITY_FAIL_MESSAGE, output)

      # emcc should also check sanity if the file is outdated
      time.sleep(0.1)
      restore()
      assert mtime(SANITY_FILE) < mtime(CONFIG_FILE)
      output = self.check_working(EMCC)
      self.assertContained(SANITY_MESSAGE, output)
      assert mtime(SANITY_FILE) >= mtime(CONFIG_FILE)
      self.assertNotContained(SANITY_FAIL_MESSAGE, output)

else:
  raise Exception('Test runner is confused: ' + str(sys.argv))

if __name__ == '__main__':
  sys.argv = [sys.argv[0]] + ['-v'] + sys.argv[1:] # Verbose output by default

  # Sanity checks

  check_sanity(force=True)

  total_engines = len(JS_ENGINES)
  JS_ENGINES = filter(check_engine, JS_ENGINES)
  if len(JS_ENGINES) == 0:
    print 'WARNING: None of the JS engines in JS_ENGINES appears to work.'
  elif len(JS_ENGINES) < total_engines:
    print 'WARNING: Not all the JS engines in JS_ENGINES appears to work, ignoring those.'

  # Go

  unittest.main()