emscripten/emscripten.py

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Python
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#!/usr/bin/env python2
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'''
You should normally never use this! Use emcc instead.
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This is a small wrapper script around the core JS compiler. This calls that
compiler with the settings given to it. It can also read data from C/C++
header files (so that the JS compiler can see the constants in those
headers, for the libc implementation in JS).
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'''
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import os, sys, json, optparse, subprocess, re, time, multiprocessing, string, logging
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from tools import shared
from tools import jsrun, cache as cache_module, tempfiles
from tools.response_file import read_response_file
from tools.shared import WINDOWS
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__rootpath__ = os.path.abspath(os.path.dirname(__file__))
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def path_from_root(*pathelems):
"""Returns the absolute path for which the given path elements are
relative to the emscripten root.
"""
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return os.path.join(__rootpath__, *pathelems)
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def get_configuration():
if hasattr(get_configuration, 'configuration'):
return get_configuration.configuration
configuration = shared.Configuration(environ=os.environ)
get_configuration.configuration = configuration
return configuration
def scan(ll, settings):
# blockaddress(@main, %23)
blockaddrs = []
for blockaddr in re.findall('blockaddress\([^)]*\)', ll):
b = blockaddr.split('(')[1][:-1].split(', ')
blockaddrs.append(b)
if len(blockaddrs) > 0:
settings['NECESSARY_BLOCKADDRS'] = blockaddrs
NUM_CHUNKS_PER_CORE = 1.0
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MIN_CHUNK_SIZE = 1024*1024
MAX_CHUNK_SIZE = float(os.environ.get('EMSCRIPT_MAX_CHUNK_SIZE') or 'inf') # configuring this is just for debugging purposes
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STDERR_FILE = os.environ.get('EMCC_STDERR_FILE')
if STDERR_FILE:
STDERR_FILE = os.path.abspath(STDERR_FILE)
logging.info('logging stderr in js compiler phase into %s' % STDERR_FILE)
STDERR_FILE = open(STDERR_FILE, 'w')
def process_funcs((i, funcs_file, meta, settings_file, compiler, forwarded_file, libraries, compiler_engine, DEBUG)):
try:
#print >> sys.stderr, 'running', str([settings_file, funcs_file, 'funcs', forwarded_file] + libraries).replace("'/", "'") # can use this in src/compiler_funcs.html arguments,
# # just copy temp dir to under this one
out = jsrun.run_js(
compiler,
engine=compiler_engine,
args=[settings_file, funcs_file, 'funcs', forwarded_file] + libraries,
stdout=subprocess.PIPE,
stderr=STDERR_FILE,
cwd=path_from_root('src'))
except KeyboardInterrupt:
# Python 2.7 seems to lock up when a child process throws KeyboardInterrupt
raise Exception()
if DEBUG: logging.debug('.')
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return out
def emscript(infile, settings, outfile, libraries=[], compiler_engine=None,
jcache=None, temp_files=None, DEBUG=None, DEBUG_CACHE=None):
"""Runs the emscripten LLVM-to-JS compiler. We parallelize as much as possible
Args:
infile: The path to the input LLVM assembly file.
settings: JSON-formatted settings that override the values
defined in src/settings.js.
outfile: The file where the output is written.
"""
compiler = path_from_root('src', 'compiler.js')
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# Parallelization: We run 3 phases:
# 1 aka 'pre' : Process types and metadata and so forth, and generate the preamble.
# 2 aka 'funcs': Process functions. We can parallelize this, working on each function independently.
# 3 aka 'post' : Process globals, generate postamble and finishing touches.
if DEBUG: logging.debug('emscript: ll=>js')
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if jcache: jcache.ensure()
# Pre-scan ll and alter settings as necessary
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if DEBUG: t = time.time()
ll = open(infile).read()
scan(ll, settings)
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total_ll_size = len(ll)
if DEBUG: logging.debug(' emscript: scan took %s seconds' % (time.time() - t))
# Split input into the relevant parts for each phase
if DEBUG: t = time.time()
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pre = []
funcs = [] # split up functions here, for parallelism later
meta_start = ll.find('\n!')
if meta_start > 0:
meta = ll[meta_start:]
else:
meta = ''
meta_start = -1
start = ll.find('\n') if ll[0] == ';' else 0 # ignore first line, which contains ; ModuleID = '/dir name'
func_start = start
last = func_start
while 1:
last = func_start
func_start = ll.find('\ndefine ', func_start)
if func_start > last:
pre.append(ll[last:min(func_start+1, meta_start) if meta_start > 0 else func_start+1] + '\n')
if func_start < 0:
pre.append(ll[last:meta_start] + '\n')
break
header = ll[func_start+1:ll.find('\n', func_start+1)+1]
end = ll.find('\n}', func_start)
last = end+3
funcs.append((header, ll[func_start+1:last]))
pre.append(header + '}\n')
func_start = last
ll = None
if DEBUG and len(meta) > 1024*1024: logging.debug('emscript warning: large amounts of metadata, will slow things down')
if DEBUG: logging.debug(' emscript: split took %s seconds' % (time.time() - t))
if len(funcs) == 0:
logging.error('No functions to process. Make sure you prevented LLVM from eliminating them as dead (use EXPORTED_FUNCTIONS if necessary, see the FAQ)')
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#if DEBUG:
# logging.debug('========= pre ================\n')
# logging.debug(''.join(pre))
# logging.debug('========== funcs ===============\n')
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# for func in funcs:
# logging.debug('\n// ===\n\n', ''.join(func))
# logging.debug('=========================\n')
# Save settings to a file to work around v8 issue 1579
settings_file = temp_files.get('.txt').name
def save_settings():
global settings_text
settings_text = json.dumps(settings, sort_keys=True)
s = open(settings_file, 'w')
s.write(settings_text)
s.close()
save_settings()
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# Phase 1 - pre
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if DEBUG: t = time.time()
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pre_file = temp_files.get('.pre.ll').name
pre_input = ''.join(pre) + '\n' + meta
out = None
if jcache:
keys = [pre_input, settings_text, ','.join(libraries)]
shortkey = jcache.get_shortkey(keys)
if DEBUG_CACHE: logging.debug('shortkey', shortkey)
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out = jcache.get(shortkey, keys)
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if DEBUG_CACHE and not out:
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dfpath = os.path.join(get_configuration().TEMP_DIR, "ems_" + shortkey)
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dfp = open(dfpath, 'w')
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dfp.write(pre_input)
dfp.write("\n\n========================== settings_text\n\n")
dfp.write(settings_text)
dfp.write("\n\n========================== libraries\n\n")
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dfp.write("\n".join(libraries))
dfp.close()
logging.debug(' cache miss, key data dumped to %s' % dfpath)
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if out and DEBUG: logging.debug(' loading pre from jcache')
if not out:
open(pre_file, 'w').write(pre_input)
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#print >> sys.stderr, 'running', str([settings_file, pre_file, 'pre'] + libraries).replace("'/", "'") # see funcs
out = jsrun.run_js(compiler, compiler_engine, [settings_file, pre_file, 'pre'] + libraries, stdout=subprocess.PIPE, stderr=STDERR_FILE,
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cwd=path_from_root('src'))
assert '//FORWARDED_DATA:' in out, 'Did not receive forwarded data in pre output - process failed?'
if jcache:
if DEBUG: logging.debug(' saving pre to jcache')
jcache.set(shortkey, keys, out)
pre, forwarded_data = out.split('//FORWARDED_DATA:')
forwarded_file = temp_files.get('.json').name
pre_input = None
open(forwarded_file, 'w').write(forwarded_data)
if DEBUG: logging.debug(' emscript: phase 1 took %s seconds' % (time.time() - t))
indexed_functions = set()
forwarded_json = json.loads(forwarded_data)
for key in forwarded_json['Functions']['indexedFunctions'].iterkeys():
indexed_functions.add(key)
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# Phase 2 - func
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cores = int(os.environ.get('EMCC_CORES') or multiprocessing.cpu_count())
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assert cores >= 1
if cores > 1:
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intended_num_chunks = int(round(cores * NUM_CHUNKS_PER_CORE))
chunk_size = max(MIN_CHUNK_SIZE, total_ll_size / intended_num_chunks)
chunk_size += 3*len(meta) # keep ratio of lots of function code to meta (expensive to process, and done in each parallel task)
chunk_size = min(MAX_CHUNK_SIZE, chunk_size)
else:
chunk_size = MAX_CHUNK_SIZE # if 1 core, just use the max chunk size
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if DEBUG: t = time.time()
if settings.get('ASM_JS'):
settings['EXPORTED_FUNCTIONS'] = forwarded_json['EXPORTED_FUNCTIONS']
save_settings()
chunks = cache_module.chunkify(
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funcs, chunk_size,
jcache.get_cachename('emscript_files') if jcache else None)
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#sys.exit(1)
#chunks = [chunks[0]] # pick specific chunks for debugging/profiling
funcs = None
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if jcache:
# load chunks from cache where we can # TODO: ignore small chunks
cached_outputs = []
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def load_from_cache(chunk):
keys = [settings_text, forwarded_data, chunk]
shortkey = jcache.get_shortkey(keys) # TODO: share shortkeys with later code
out = jcache.get(shortkey, keys) # this is relatively expensive (pickling?)
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if out:
cached_outputs.append(out)
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return False
return True
chunks = filter(load_from_cache, chunks)
if len(cached_outputs) > 0:
if out and DEBUG: logging.debug(' loading %d funcchunks from jcache' % len(cached_outputs))
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else:
cached_outputs = []
# TODO: minimize size of forwarded data from funcs to what we actually need
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if len(chunks) > 0:
if cores == 1 and total_ll_size < MAX_CHUNK_SIZE:
assert len(chunks) == 1, 'no point in splitting up without multiple cores'
if DEBUG: logging.debug(' emscript: phase 2 working on %d chunks %s (intended chunk size: %.2f MB, meta: %.2f MB, forwarded: %.2f MB, total: %.2f MB)' % (len(chunks), ('using %d cores' % cores) if len(chunks) > 1 else '', chunk_size/(1024*1024.), len(meta)/(1024*1024.), len(forwarded_data)/(1024*1024.), total_ll_size/(1024*1024.)))
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commands = []
for i in range(len(chunks)):
funcs_file = temp_files.get('.func_%d.ll' % i).name
f = open(funcs_file, 'w')
f.write(chunks[i])
if not jcache:
chunks[i] = None # leave chunks array alive (need its length later)
f.write('\n')
f.write(meta)
f.close()
commands.append(
(i, funcs_file, meta, settings_file, compiler, forwarded_file, libraries, compiler_engine,# + ['--prof'],
DEBUG)
)
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if len(chunks) > 1:
pool = multiprocessing.Pool(processes=cores)
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outputs = pool.map(process_funcs, commands, chunksize=1)
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elif len(chunks) == 1:
outputs = [process_funcs(commands[0])]
commands = None
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else:
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outputs = []
if jcache:
# save chunks to cache
for i in range(len(chunks)):
chunk = chunks[i]
keys = [settings_text, forwarded_data, chunk]
shortkey = jcache.get_shortkey(keys)
jcache.set(shortkey, keys, outputs[i])
if out and DEBUG and len(chunks) > 0: logging.debug(' saving %d funcchunks to jcache' % len(chunks))
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chunks = None
if jcache: outputs += cached_outputs # TODO: preserve order
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outputs = [output.split('//FORWARDED_DATA:') for output in outputs]
for output in outputs:
assert len(output) == 2, 'Did not receive forwarded data in an output - process failed? We only got: ' + output[0][-3000:]
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if DEBUG: logging.debug(' emscript: phase 2 took %s seconds' % (time.time() - t))
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if DEBUG: t = time.time()
# merge forwarded data
if settings.get('ASM_JS'):
all_exported_functions = set(settings['EXPORTED_FUNCTIONS']) # both asm.js and otherwise
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for additional_export in settings['DEFAULT_LIBRARY_FUNCS_TO_INCLUDE']: # additional functions to export from asm, if they are implemented
all_exported_functions.add('_' + additional_export)
exported_implemented_functions = set()
for func_js, curr_forwarded_data in outputs:
curr_forwarded_json = json.loads(curr_forwarded_data)
forwarded_json['Types']['hasInlineJS'] = forwarded_json['Types']['hasInlineJS'] or curr_forwarded_json['Types']['hasInlineJS']
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forwarded_json['Types']['usesSIMD'] = forwarded_json['Types']['usesSIMD'] or curr_forwarded_json['Types']['usesSIMD']
forwarded_json['Types']['preciseI64MathUsed'] = forwarded_json['Types']['preciseI64MathUsed'] or curr_forwarded_json['Types']['preciseI64MathUsed']
for key, value in curr_forwarded_json['Functions']['blockAddresses'].iteritems():
forwarded_json['Functions']['blockAddresses'][key] = value
for key in curr_forwarded_json['Functions']['indexedFunctions'].iterkeys():
indexed_functions.add(key)
if settings.get('ASM_JS'):
export_bindings = settings['EXPORT_BINDINGS']
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export_all = settings['EXPORT_ALL']
for key in curr_forwarded_json['Functions']['implementedFunctions'].iterkeys():
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if key in all_exported_functions or export_all or (export_bindings and key.startswith('_emscripten_bind')):
exported_implemented_functions.add(key)
for key, value in curr_forwarded_json['Functions']['unimplementedFunctions'].iteritems():
forwarded_json['Functions']['unimplementedFunctions'][key] = value
for key, value in curr_forwarded_json['Functions']['neededTables'].iteritems():
forwarded_json['Functions']['neededTables'][key] = value
if settings.get('ASM_JS'):
parts = pre.split('// ASM_LIBRARY FUNCTIONS\n')
if len(parts) > 1:
pre = parts[0]
outputs.append([parts[1]])
funcs_js = [output[0] for output in outputs]
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outputs = None
if DEBUG: logging.debug(' emscript: phase 2b took %s seconds' % (time.time() - t))
if DEBUG: t = time.time()
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# calculations on merged forwarded data
forwarded_json['Functions']['indexedFunctions'] = {}
i = settings['FUNCTION_POINTER_ALIGNMENT'] # universal counter
if settings['ASM_JS']: i += settings['RESERVED_FUNCTION_POINTERS']*settings['FUNCTION_POINTER_ALIGNMENT']
base_fp = i
table_counters = {} # table-specific counters
alias = settings['ASM_JS'] and settings['ALIASING_FUNCTION_POINTERS']
sig = None
for indexed in indexed_functions:
if alias:
sig = forwarded_json['Functions']['implementedFunctions'].get(indexed) or forwarded_json['Functions']['unimplementedFunctions'].get(indexed)
assert sig, indexed
if sig not in table_counters:
table_counters[sig] = base_fp
curr = table_counters[sig]
table_counters[sig] += settings['FUNCTION_POINTER_ALIGNMENT']
else:
curr = i
i += settings['FUNCTION_POINTER_ALIGNMENT']
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#logging.debug('function indexing ' + str([indexed, curr, sig]))
forwarded_json['Functions']['indexedFunctions'][indexed] = curr # make sure not to modify this python object later - we use it in indexize
def split_32(x):
x = int(x)
return '%d,%d,%d,%d' % (x&255, (x >> 8)&255, (x >> 16)&255, (x >> 24)&255)
indexing = forwarded_json['Functions']['indexedFunctions']
def indexize_mem(js):
return re.sub(r"\"?'?{{ FI_([\w\d_$]+) }}'?\"?,0,0,0", lambda m: split_32(indexing.get(m.groups(0)[0]) or 0), js)
def indexize(js):
return re.sub(r"'{{ FI_([\w\d_$]+) }}'", lambda m: str(indexing.get(m.groups(0)[0]) or 0), js)
blockaddrs = forwarded_json['Functions']['blockAddresses']
def blockaddrsize_mem(js):
return re.sub(r'"?{{{ BA_([\w\d_$]+)\|([\w\d_$]+) }}}"?,0,0,0', lambda m: split_32(blockaddrs[m.groups(0)[0]][m.groups(0)[1]]), js)
def blockaddrsize(js):
return re.sub(r'"?{{{ BA_([\w\d_$]+)\|([\w\d_$]+) }}}"?', lambda m: str(blockaddrs[m.groups(0)[0]][m.groups(0)[1]]), js)
pre = blockaddrsize(blockaddrsize_mem(indexize(indexize_mem(pre))))
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if settings.get('ASM_JS'):
# move postsets into the asm module
class PostSets: js = ''
def handle_post_sets(m):
PostSets.js = m.group(0)
return '\n'
pre = re.sub(r'function runPostSets[^}]+}', handle_post_sets, pre)
#if DEBUG: outfile.write('// pre\n')
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outfile.write(pre)
pre = None
#if DEBUG: outfile.write('// funcs\n')
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# forward
forwarded_data = json.dumps(forwarded_json)
forwarded_file = temp_files.get('.2.json').name
open(forwarded_file, 'w').write(indexize(forwarded_data))
if DEBUG: logging.debug(' emscript: phase 2c took %s seconds' % (time.time() - t))
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# Phase 3 - post
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if DEBUG: t = time.time()
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post_file = temp_files.get('.post.ll').name
open(post_file, 'w').write('\n') # no input, just processing of forwarded data
out = jsrun.run_js(compiler, compiler_engine, [settings_file, post_file, 'post', forwarded_file] + libraries, stdout=subprocess.PIPE, stderr=STDERR_FILE,
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cwd=path_from_root('src'))
post, last_forwarded_data = out.split('//FORWARDED_DATA:') # if this fails, perhaps the process failed prior to printing forwarded data?
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last_forwarded_json = json.loads(last_forwarded_data)
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if settings.get('ASM_JS'):
post_funcs, post_rest = post.split('// EMSCRIPTEN_END_FUNCS\n')
post = post_rest
# Move preAsms to their right place
def move_preasm(m):
contents = m.groups(0)[0]
outfile.write(contents + '\n')
return ''
post_funcs = re.sub(r'/\* PRE_ASM \*/(.*)\n', lambda m: move_preasm(m), post_funcs)
funcs_js += ['\n' + post_funcs + '// EMSCRIPTEN_END_FUNCS\n']
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simple = os.environ.get('EMCC_SIMPLE_ASM')
class Counter:
i = 0
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j = 0
pre_tables = last_forwarded_json['Functions']['tables']['pre']
del last_forwarded_json['Functions']['tables']['pre']
def make_table(sig, raw):
i = Counter.i
Counter.i += 1
bad = 'b' + str(i)
params = ','.join(['p%d' % p for p in range(len(sig)-1)])
coercions = ';'.join(['p%d = %s' % (p, shared.JS.make_coercion('p%d' % p, sig[p+1], settings)) for p in range(len(sig)-1)]) + ';'
ret = '' if sig[0] == 'v' else ('return %s' % shared.JS.make_initializer(sig[0], settings))
start = raw.index('[')
end = raw.rindex(']')
body = raw[start+1:end].split(',')
for j in range(settings['RESERVED_FUNCTION_POINTERS']):
body[settings['FUNCTION_POINTER_ALIGNMENT'] * (1 + j)] = 'jsCall_%s_%s' % (sig, j)
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Counter.j = 0
def fix_item(item):
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Counter.j += 1
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newline = Counter.j % 30 == 29
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if item == '0': return bad if not newline else (bad + '\n')
return item if not newline else (item + '\n')
body = ','.join(map(fix_item, body))
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return ('function %s(%s) { %s %s(%d); %s }' % (bad, params, coercions, 'abort' if not settings['ASSERTIONS'] else 'nullFunc', i, ret), ''.join([raw[:start+1], body, raw[end:]]))
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infos = [make_table(sig, raw) for sig, raw in last_forwarded_json['Functions']['tables'].iteritems()]
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function_tables_defs = '\n'.join([info[0] for info in infos]) + '\n// EMSCRIPTEN_END_FUNCS\n' + '\n'.join([info[1] for info in infos])
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asm_setup = ''
maths = ['Math.' + func for func in ['floor', 'abs', 'sqrt', 'pow', 'cos', 'sin', 'tan', 'acos', 'asin', 'atan', 'atan2', 'exp', 'log', 'ceil', 'imul']]
fundamentals = ['Math', 'Int8Array', 'Int16Array', 'Int32Array', 'Uint8Array', 'Uint16Array', 'Uint32Array', 'Float32Array', 'Float64Array']
math_envs = ['Math.min'] # TODO: move min to maths
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asm_setup += '\n'.join(['var %s = %s;' % (f.replace('.', '_'), f) for f in math_envs])
if settings['PRECISE_F32']: maths += ['Math.fround']
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basic_funcs = ['abort', 'assert', 'asmPrintInt', 'asmPrintFloat'] + [m.replace('.', '_') for m in math_envs]
if settings['RESERVED_FUNCTION_POINTERS'] > 0: basic_funcs.append('jsCall')
if settings['SAFE_HEAP']: basic_funcs += ['SAFE_HEAP_LOAD', 'SAFE_HEAP_STORE', 'SAFE_FT_MASK']
if settings['CHECK_HEAP_ALIGN']: basic_funcs += ['CHECK_ALIGN_2', 'CHECK_ALIGN_4', 'CHECK_ALIGN_8']
if settings['ASSERTIONS']:
basic_funcs += ['nullFunc']
asm_setup += 'function nullFunc(x) { Module["printErr"]("Invalid function pointer called. Perhaps a miscast function pointer (check compilation warnings) or bad vtable lookup (maybe due to derefing a bad pointer, like NULL)?"); abort(x) }\n'
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basic_vars = ['STACKTOP', 'STACK_MAX', 'tempDoublePtr', 'ABORT']
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basic_float_vars = ['NaN', 'Infinity']
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if forwarded_json['Types']['preciseI64MathUsed'] or \
forwarded_json['Functions']['libraryFunctions'].get('_llvm_cttz_i32') or \
forwarded_json['Functions']['libraryFunctions'].get('_llvm_ctlz_i32'):
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basic_vars += ['cttz_i8', 'ctlz_i8']
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if settings.get('DLOPEN_SUPPORT'):
for sig in last_forwarded_json['Functions']['tables'].iterkeys():
basic_vars.append('F_BASE_%s' % sig)
asm_setup += ' var F_BASE_%s = %s;\n' % (sig, 'FUNCTION_TABLE_OFFSET' if settings.get('SIDE_MODULE') else '0') + '\n'
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asm_runtime_funcs = ['stackAlloc', 'stackSave', 'stackRestore', 'setThrew'] + ['setTempRet%d' % i for i in range(10)] + ['getTempRet%d' % i for i in range(10)]
# function tables
function_tables = ['dynCall_' + table for table in last_forwarded_json['Functions']['tables']]
function_tables_impls = []
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for sig in last_forwarded_json['Functions']['tables'].iterkeys():
args = ','.join(['a' + str(i) for i in range(1, len(sig))])
arg_coercions = ' '.join(['a' + str(i) + '=' + shared.JS.make_coercion('a' + str(i), sig[i], settings) + ';' for i in range(1, len(sig))])
coerced_args = ','.join([shared.JS.make_coercion('a' + str(i), sig[i], settings) for i in range(1, len(sig))])
ret = ('return ' if sig[0] != 'v' else '') + shared.JS.make_coercion('FUNCTION_TABLE_%s[index&{{{ FTM_%s }}}](%s)' % (sig, sig, coerced_args), sig[0], settings)
function_tables_impls.append('''
function dynCall_%s(index%s%s) {
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index = index|0;
%s
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%s;
}
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''' % (sig, ',' if len(sig) > 1 else '', args, arg_coercions, ret))
for i in range(settings['RESERVED_FUNCTION_POINTERS']):
jsret = ('return ' if sig[0] != 'v' else '') + shared.JS.make_coercion('jsCall(%d%s%s)' % (i, ',' if coerced_args else '', coerced_args), sig[0], settings)
function_tables_impls.append('''
function jsCall_%s_%s(%s) {
%s
%s;
}
''' % (sig, i, args, arg_coercions, jsret))
shared.Settings.copy(settings)
asm_setup += '\n' + shared.JS.make_invoke(sig) + '\n'
basic_funcs.append('invoke_%s' % sig)
if settings.get('DLOPEN_SUPPORT'):
asm_setup += '\n' + shared.JS.make_extcall(sig) + '\n'
basic_funcs.append('extCall_%s' % sig)
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# calculate exports
exported_implemented_functions = list(exported_implemented_functions)
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exported_implemented_functions.append('runPostSets')
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exports = []
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if not simple:
for export in exported_implemented_functions + asm_runtime_funcs + function_tables:
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exports.append("%s: %s" % (export, export))
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exports = '{ ' + ', '.join(exports) + ' }'
else:
exports = '_main'
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# calculate globals
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try:
del forwarded_json['Variables']['globals']['_llvm_global_ctors'] # not a true variable
except:
pass
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# If no named globals, only need externals
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global_vars = map(lambda g: g['name'], filter(lambda g: settings['NAMED_GLOBALS'] or g.get('external') or g.get('unIndexable'), forwarded_json['Variables']['globals'].values()))
global_funcs = [key for key, value in forwarded_json['Functions']['libraryFunctions'].iteritems() if value != 2]
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def math_fix(g):
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return g if not g.startswith('Math_') else g.split('_')[1]
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asm_global_funcs = ''.join([' var ' + g.replace('.', '_') + '=global.' + g + ';\n' for g in maths]) + \
''.join([' var ' + g + '=env.' + math_fix(g) + ';\n' for g in basic_funcs + global_funcs])
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asm_global_vars = ''.join([' var ' + g + '=env.' + g + '|0;\n' for g in basic_vars + global_vars]) + \
''.join([' var ' + g + '=+env.' + g + ';\n' for g in basic_float_vars])
# In linkable modules, we need to add some explicit globals for global variables that can be linked and used across modules
if settings.get('MAIN_MODULE') or settings.get('SIDE_MODULE'):
assert settings.get('TARGET_ASMJS_UNKNOWN_EMSCRIPTEN'), 'TODO: support x86 target when linking modules (needs offset of 4 and not 8 here)'
for key, value in forwarded_json['Variables']['globals'].iteritems():
if value.get('linkable'):
init = forwarded_json['Variables']['indexedGlobals'][key] + 8 # 8 is Runtime.GLOBAL_BASE / STATIC_BASE
if settings.get('SIDE_MODULE'): init = '(H_BASE+' + str(init) + ')|0'
asm_global_vars += ' var %s=%s;\n' % (key, str(init))
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# sent data
the_global = '{ ' + ', '.join(['"' + math_fix(s) + '": ' + s for s in fundamentals]) + ' }'
sending = '{ ' + ', '.join(['"' + math_fix(s) + '": ' + s for s in basic_funcs + global_funcs + basic_vars + basic_float_vars + global_vars]) + ' }'
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# received
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if not simple:
receiving = ';\n'.join(['var ' + s + ' = Module["' + s + '"] = asm["' + s + '"]' for s in exported_implemented_functions + function_tables])
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else:
receiving = 'var _main = Module["_main"] = asm;'
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# finalize
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if DEBUG: logging.debug('asm text sizes' + str([map(len, funcs_js), len(asm_setup), len(asm_global_vars), len(asm_global_funcs), len(pre_tables), len('\n'.join(function_tables_impls)), len(function_tables_defs.replace('\n', '\n ')), len(exports), len(the_global), len(sending), len(receiving)]))
funcs_js = ['''
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%s
function asmPrintInt(x, y) {
Module.print('int ' + x + ',' + y);// + ' ' + new Error().stack);
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}
function asmPrintFloat(x, y) {
Module.print('float ' + x + ',' + y);// + ' ' + new Error().stack);
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}
// EMSCRIPTEN_START_ASM
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var asm = (function(global, env, buffer) {
%s
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var HEAP8 = new global.Int8Array(buffer);
var HEAP16 = new global.Int16Array(buffer);
var HEAP32 = new global.Int32Array(buffer);
var HEAPU8 = new global.Uint8Array(buffer);
var HEAPU16 = new global.Uint16Array(buffer);
var HEAPU32 = new global.Uint32Array(buffer);
var HEAPF32 = new global.Float32Array(buffer);
var HEAPF64 = new global.Float64Array(buffer);
''' % (asm_setup, "'use asm';" if not forwarded_json['Types']['hasInlineJS'] and not settings['SIDE_MODULE'] and settings['ASM_JS'] == 1 else "'almost asm';") + '\n' + asm_global_vars + '''
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var __THREW__ = 0;
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var threwValue = 0;
var setjmpId = 0;
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var undef = 0;
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var tempInt = 0, tempBigInt = 0, tempBigIntP = 0, tempBigIntS = 0, tempBigIntR = 0.0, tempBigIntI = 0, tempBigIntD = 0, tempValue = 0, tempDouble = 0.0;
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''' + ''.join(['''
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var tempRet%d = 0;''' % i for i in range(10)]) + '\n' + asm_global_funcs] + [' var tempFloat = %s;\n' % ('Math_fround(0)' if settings.get('PRECISE_F32') else '0.0')] + ([' const f0 = Math_fround(0);\n'] if settings.get('PRECISE_F32') else []) + ['''
// EMSCRIPTEN_START_FUNCS
function stackAlloc(size) {
size = size|0;
var ret = 0;
ret = STACKTOP;
STACKTOP = (STACKTOP + size)|0;
''' + ('STACKTOP = (STACKTOP + 3)&-4;' if settings['TARGET_X86'] else 'STACKTOP = (STACKTOP + 7)&-8;') + '''
return ret|0;
}
function stackSave() {
return STACKTOP|0;
}
function stackRestore(top) {
top = top|0;
STACKTOP = top;
}
function setThrew(threw, value) {
threw = threw|0;
value = value|0;
if ((__THREW__|0) == 0) {
__THREW__ = threw;
threwValue = value;
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}
}
function copyTempFloat(ptr) {
ptr = ptr|0;
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HEAP8[tempDoublePtr>>0] = HEAP8[ptr>>0];
HEAP8[tempDoublePtr+1>>0] = HEAP8[ptr+1>>0];
HEAP8[tempDoublePtr+2>>0] = HEAP8[ptr+2>>0];
HEAP8[tempDoublePtr+3>>0] = HEAP8[ptr+3>>0];
}
function copyTempDouble(ptr) {
ptr = ptr|0;
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HEAP8[tempDoublePtr>>0] = HEAP8[ptr>>0];
HEAP8[tempDoublePtr+1>>0] = HEAP8[ptr+1>>0];
HEAP8[tempDoublePtr+2>>0] = HEAP8[ptr+2>>0];
HEAP8[tempDoublePtr+3>>0] = HEAP8[ptr+3>>0];
HEAP8[tempDoublePtr+4>>0] = HEAP8[ptr+4>>0];
HEAP8[tempDoublePtr+5>>0] = HEAP8[ptr+5>>0];
HEAP8[tempDoublePtr+6>>0] = HEAP8[ptr+6>>0];
HEAP8[tempDoublePtr+7>>0] = HEAP8[ptr+7>>0];
}
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''' + ''.join(['''
function setTempRet%d(value) {
value = value|0;
tempRet%d = value;
}
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''' % (i, i) for i in range(10)]) + ''.join(['''
function getTempRet%d() {
return tempRet%d|0;
}
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''' % (i, i) for i in range(10)])] + [PostSets.js + '\n'] + funcs_js + ['''
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%s
return %s;
})
// EMSCRIPTEN_END_ASM
(%s, %s, buffer);
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%s;
''' % (pre_tables + '\n'.join(function_tables_impls) + '\n' + function_tables_defs.replace('\n', '\n '), exports, the_global, sending, receiving)]
if not settings.get('SIDE_MODULE'):
funcs_js.append('''
Runtime.stackAlloc = asm['stackAlloc'];
Runtime.stackSave = asm['stackSave'];
Runtime.stackRestore = asm['stackRestore'];
Runtime.setTempRet0 = asm['setTempRet0'];
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Runtime.getTempRet0 = asm['getTempRet0'];
''')
# Set function table masks
masks = {}
max_mask = 0
for sig, table in last_forwarded_json['Functions']['tables'].iteritems():
mask = table.count(',')
masks[sig] = str(mask)
max_mask = max(mask, max_mask)
def function_table_maskize(js, masks):
def fix(m):
sig = m.groups(0)[0]
return masks[sig]
return re.sub(r'{{{ FTM_([\w\d_$]+) }}}', lambda m: fix(m), js) # masks[m.groups(0)[0]]
funcs_js = map(lambda js: function_table_maskize(js, masks), funcs_js)
if settings.get('DLOPEN_SUPPORT'):
funcs_js.append('''
asm.maxFunctionIndex = %(max_mask)d;
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DLFCN.registerFunctions(asm, %(max_mask)d+1, %(sigs)s, Module);
Module.SYMBOL_TABLE = SYMBOL_TABLE;
''' % { 'max_mask': max_mask, 'sigs': str(map(str, last_forwarded_json['Functions']['tables'].keys())) })
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else:
function_tables_defs = '\n'.join([table for table in last_forwarded_json['Functions']['tables'].itervalues()])
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outfile.write(function_tables_defs)
funcs_js = ['''
// EMSCRIPTEN_START_FUNCS
'''] + funcs_js + ['''
// EMSCRIPTEN_END_FUNCS
''']
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# Create symbol table for self-dlopen
if settings.get('DLOPEN_SUPPORT'):
symbol_table = {}
for k, v in forwarded_json['Variables']['indexedGlobals'].iteritems():
if forwarded_json['Variables']['globals'][k]['named']:
symbol_table[k] = str(v + forwarded_json['Runtime']['GLOBAL_BASE'])
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for raw in last_forwarded_json['Functions']['tables'].itervalues():
if raw == '': continue
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table = map(string.strip, raw[raw.find('[')+1:raw.find(']')].split(","))
for i in range(len(table)):
value = table[i]
if value != '0':
if settings.get('SIDE_MODULE'):
symbol_table[value] = 'FUNCTION_TABLE_OFFSET+' + str(i)
else:
symbol_table[value] = str(i)
outfile.write("var SYMBOL_TABLE = %s;" % json.dumps(symbol_table).replace('"', ''))
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for i in range(len(funcs_js)): # do this loop carefully to save memory
funcs_js_item = funcs_js[i]
funcs_js[i] = None
funcs_js_item = indexize(funcs_js_item)
funcs_js_item = blockaddrsize(funcs_js_item)
if WINDOWS: funcs_js_item = funcs_js_item.replace('\r\n', '\n') # Normalize to UNIX line endings, otherwise writing to text file will duplicate \r\n to \r\r\n!
outfile.write(funcs_js_item)
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funcs_js = None
indexized = indexize(post)
if WINDOWS: indexized = indexized.replace('\r\n', '\n') # Normalize to UNIX line endings, otherwise writing to text file will duplicate \r\n to \r\r\n!
outfile.write(indexized)
outfile.close()
if DEBUG: logging.debug(' emscript: phase 3 took %s seconds' % (time.time() - t))
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# emscript_fast: emscript'en code using the 'fast' compilation path, using
# an LLVM backend
# FIXME: this is just a copy-paste of normal emscript(), and we trample it
# if the proper env var is set (see below). we should refactor to
# share code between the two, once emscript_fast stabilizes (or,
# leaving it separate like it is will make it trivial to rip out
# if the experiment fails)
def emscript_fast(infile, settings, outfile, libraries=[], compiler_engine=None,
jcache=None, temp_files=None, DEBUG=None, DEBUG_CACHE=None):
"""Runs the emscripten LLVM-to-JS compiler.
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Args:
infile: The path to the input LLVM assembly file.
settings: JSON-formatted settings that override the values
defined in src/settings.js.
outfile: The file where the output is written.
"""
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assert(settings['ASM_JS'])
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success = False
try:
# Overview:
# * Run LLVM backend to emit JS. JS includes function bodies, memory initializer,
# and various metadata
# * Run compiler.js on the metadata to emit the shell js code, pre/post-ambles,
# JS library dependencies, etc.
temp_js = temp_files.get('.4.js').name
backend_compiler = os.path.join(shared.LLVM_ROOT, 'llc')
backend_args = [backend_compiler, infile, '-march=js', '-filetype=asm', '-o', temp_js]
if settings['PRECISE_F32']:
backend_args += ['-emscripten-precise-f32']
if settings['WARN_UNALIGNED']:
backend_args += ['-emscripten-warn-unaligned']
if settings['RESERVED_FUNCTION_POINTERS'] > 0:
backend_args += ['-emscripten-reserved-function-pointers=%d' % settings['RESERVED_FUNCTION_POINTERS']]
if settings['ASSERTIONS'] > 0:
backend_args += ['-emscripten-assertions=%d' % settings['ASSERTIONS']]
if settings['ALIASING_FUNCTION_POINTERS'] == 0:
backend_args += ['-emscripten-no-aliasing-function-pointers']
backend_args += ['-O' + str(settings['OPT_LEVEL'])]
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backend_args += ['-emscripten-max-setjmps=%d' % settings['MAX_SETJMPS']]
if DEBUG:
logging.debug('emscript: llvm backend: ' + ' '.join(backend_args))
t = time.time()
shared.jsrun.timeout_run(subprocess.Popen(backend_args, stdout=subprocess.PIPE))
if DEBUG:
logging.debug(' emscript: llvm backend took %s seconds' % (time.time() - t))
t = time.time()
# Split up output
backend_output = open(temp_js).read()
#if DEBUG: print >> sys.stderr, backend_output
start_funcs_marker = '// EMSCRIPTEN_START_FUNCTIONS'
end_funcs_marker = '// EMSCRIPTEN_END_FUNCTIONS'
metadata_split_marker = '// EMSCRIPTEN_METADATA'
start_funcs = backend_output.index(start_funcs_marker)
end_funcs = backend_output.rindex(end_funcs_marker)
metadata_split = backend_output.rindex(metadata_split_marker)
funcs = backend_output[start_funcs+len(start_funcs_marker):end_funcs]
metadata_raw = backend_output[metadata_split+len(metadata_split_marker):]
#if DEBUG: print >> sys.stderr, "METAraw", metadata_raw
metadata = json.loads(metadata_raw)
mem_init = backend_output[end_funcs+len(end_funcs_marker):metadata_split]
#if DEBUG: print >> sys.stderr, "FUNCS", funcs
#if DEBUG: print >> sys.stderr, "META", metadata
#if DEBUG: print >> sys.stderr, "meminit", mem_init
# function table masks
table_sizes = {}
for k, v in metadata['tables'].iteritems():
table_sizes[k] = str(v.count(',')) # undercounts by one, but that is what we want
#if settings['ASSERTIONS'] >= 2 and table_sizes[k] == 0:
# print >> sys.stderr, 'warning: no function pointers with signature ' + k + ', but there is a call, which will abort if it occurs (this can result from undefined behavior, check for compiler warnings on your source files and consider -Werror)'
funcs = re.sub(r"#FM_(\w+)#", lambda m: table_sizes[m.groups(0)[0]], funcs)
# fix +float into float.0, if not running js opts
if not settings['RUNNING_JS_OPTS']:
def fix_dot_zero(m):
num = m.group(3)
# TODO: handle 0x floats?
if num.find('.') < 0:
e = num.find('e');
if e < 0:
num += '.0'
else:
num = num[:e] + '.0' + num[e:]
return m.group(1) + m.group(2) + num
funcs = re.sub(r'([(=,+\-*/%<>:?] *)\+(-?)((0x)?[0-9a-f]*\.?[0-9]+([eE][-+]?[0-9]+)?)', lambda m: fix_dot_zero(m), funcs)
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# js compiler
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if DEBUG: logging.debug('emscript: js compiler glue')
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# Settings changes
assert settings['TARGET_ASMJS_UNKNOWN_EMSCRIPTEN'] == 1
settings['TARGET_ASMJS_UNKNOWN_EMSCRIPTEN'] = 2
i64_funcs = ['i64Add', 'i64Subtract', '__muldi3', '__divdi3', '__udivdi3', '__remdi3', '__uremdi3']
for i64_func in i64_funcs:
if i64_func in metadata['declares']:
settings['PRECISE_I64_MATH'] = 2
break
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metadata['declares'] = filter(lambda i64_func: i64_func not in ['getHigh32', 'setHigh32', '__muldi3', '__divdi3', '__remdi3', '__udivdi3', '__uremdi3'], metadata['declares']) # FIXME: do these one by one as normal js lib funcs
# Integrate info from backend
settings['DEFAULT_LIBRARY_FUNCS_TO_INCLUDE'] = list(
set(settings['DEFAULT_LIBRARY_FUNCS_TO_INCLUDE'] + map(shared.JS.to_nice_ident, metadata['declares'])).difference(
map(lambda x: x[1:], metadata['implementedFunctions'])
)
) + map(lambda x: x[1:], metadata['externs'])
if metadata['simd']:
settings['SIMD'] = 1
if metadata['cantValidate'] and settings['ASM_JS'] != 2:
logging.warning('disabling asm.js validation due to use of non-supported features: ' + metadata['cantValidate'])
settings['ASM_JS'] = 2
# Save settings to a file to work around v8 issue 1579
settings_file = temp_files.get('.txt').name
def save_settings():
global settings_text
settings_text = json.dumps(settings, sort_keys=True)
s = open(settings_file, 'w')
s.write(settings_text)
s.close()
save_settings()
# Call js compiler
if DEBUG: t = time.time()
out = jsrun.run_js(path_from_root('src', 'compiler.js'), compiler_engine,
[settings_file, ';', 'glue'] + libraries, stdout=subprocess.PIPE, stderr=STDERR_FILE,
cwd=path_from_root('src'), error_limit=300)
assert '//FORWARDED_DATA:' in out, 'Did not receive forwarded data in pre output - process failed?'
glue, forwarded_data = out.split('//FORWARDED_DATA:')
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if DEBUG:
logging.debug(' emscript: glue took %s seconds' % (time.time() - t))
t = time.time()
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last_forwarded_json = forwarded_json = json.loads(forwarded_data)
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# merge in information from llvm backend
last_forwarded_json['Functions']['tables'] = metadata['tables']
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'''indexed_functions = set()
for key in forwarded_json['Functions']['indexedFunctions'].iterkeys():
indexed_functions.add(key)'''
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pre, post = glue.split('// EMSCRIPTEN_END_FUNCS')
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#print >> sys.stderr, 'glue:', pre, '\n\n||||||||||||||||\n\n', post, '...............'
# memory and global initializers
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global_initializers = ', '.join(map(lambda i: '{ func: function() { %s() } }' % i, metadata['initializers']))
2013-11-20 05:07:44 +04:00
2014-09-17 02:36:36 +04:00
staticbump = mem_init.count(',')+1
while staticbump % 8 != 0: staticbump += 1
pre = pre.replace('STATICTOP = STATIC_BASE + 0;', '''STATICTOP = STATIC_BASE + %d;
/* global initializers */ __ATINIT__.push(%s);
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%s''' % (staticbump, global_initializers, mem_init)) # XXX wrong size calculation!
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funcs_js = [funcs]
if settings.get('ASM_JS'):
parts = pre.split('// ASM_LIBRARY FUNCTIONS\n')
if len(parts) > 1:
pre = parts[0]
funcs_js.append(parts[1])
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# merge forwarded data
assert settings.get('ASM_JS'), 'fastcomp is asm.js only'
settings['EXPORTED_FUNCTIONS'] = forwarded_json['EXPORTED_FUNCTIONS']
all_exported_functions = set(settings['EXPORTED_FUNCTIONS']) # both asm.js and otherwise
for additional_export in settings['DEFAULT_LIBRARY_FUNCS_TO_INCLUDE']: # additional functions to export from asm, if they are implemented
all_exported_functions.add('_' + additional_export)
exported_implemented_functions = set(metadata['exports'])
export_bindings = settings['EXPORT_BINDINGS']
export_all = settings['EXPORT_ALL']
all_implemented = metadata['implementedFunctions'] + forwarded_json['Functions']['implementedFunctions'].keys() # XXX perf?
for key in all_implemented:
if key in all_exported_functions or export_all or (export_bindings and key.startswith('_emscripten_bind')):
exported_implemented_functions.add(key)
implemented_functions = set(metadata['implementedFunctions'])
if settings['ASSERTIONS'] and settings.get('ORIGINAL_EXPORTED_FUNCTIONS'):
for requested in settings['ORIGINAL_EXPORTED_FUNCTIONS']:
if requested not in all_implemented and \
requested != '_malloc': # special-case malloc, EXPORTED by default for internal use, but we bake in a trivial allocator and warn at runtime if used in ASSERTIONS
logging.warning('function requested to be exported, but not implemented: "%s"', requested)
# Add named globals
named_globals = '\n'.join(['var %s = %s;' % (k, v) for k, v in metadata['namedGlobals'].iteritems()])
pre = pre.replace('// === Body ===', '// === Body ===\n' + named_globals + '\n')
#if DEBUG: outfile.write('// pre\n')
outfile.write(pre)
pre = None
#if DEBUG: outfile.write('// funcs\n')
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if settings.get('ASM_JS'):
# Move preAsms to their right place
def move_preasm(m):
contents = m.groups(0)[0]
outfile.write(contents + '\n')
return ''
funcs_js[1] = re.sub(r'/\* PRE_ASM \*/(.*)\n', lambda m: move_preasm(m), funcs_js[1])
funcs_js += ['\n// EMSCRIPTEN_END_FUNCS\n']
class Counter:
i = 0
j = 0
if 'pre' in last_forwarded_json['Functions']['tables']:
pre_tables = last_forwarded_json['Functions']['tables']['pre']
del last_forwarded_json['Functions']['tables']['pre']
else:
pre_tables = ''
def unfloat(s):
return 'd' if s == 'f' else s # lower float to double for ffis
if settings['ASSERTIONS'] >= 2:
debug_tables = {}
def make_table(sig, raw):
params = ','.join(['p%d' % p for p in range(len(sig)-1)])
coerced_params = ','.join([shared.JS.make_coercion('p%d', unfloat(sig[p+1]), settings) % p for p in range(len(sig)-1)])
coercions = ';'.join(['p%d = %s' % (p, shared.JS.make_coercion('p%d' % p, sig[p+1], settings)) for p in range(len(sig)-1)]) + ';'
def make_func(name, code):
return 'function %s(%s) { %s %s }' % (name, params, coercions, code)
def make_bad(target=None):
i = Counter.i
Counter.i += 1
if target is None: target = i
name = 'b' + str(i)
if not settings['ASSERTIONS']:
code = 'abort(%s);' % target
else:
code = 'nullFunc_' + sig + '(%d);' % target
if sig[0] != 'v':
code += 'return %s' % shared.JS.make_initializer(sig[0], settings) + ';'
return name, make_func(name, code)
bad, bad_func = make_bad() # the default bad func
if settings['ASSERTIONS'] <= 1:
Counter.pre = [bad_func]
else:
Counter.pre = []
start = raw.index('[')
end = raw.rindex(']')
body = raw[start+1:end].split(',')
for j in range(settings['RESERVED_FUNCTION_POINTERS']):
curr = 'jsCall_%s_%s' % (sig, j)
body[settings['FUNCTION_POINTER_ALIGNMENT'] * (1 + j)] = curr
implemented_functions.add(curr)
Counter.j = 0
def fix_item(item):
Counter.j += 1
newline = Counter.j % 30 == 29
if item == '0':
if settings['ASSERTIONS'] <= 1:
return bad if not newline else (bad + '\n')
else:
specific_bad, specific_bad_func = make_bad(Counter.j-1)
Counter.pre.append(specific_bad_func)
return specific_bad if not newline else (specific_bad + '\n')
if item not in implemented_functions:
# this is imported into asm, we must wrap it
call_ident = item
if call_ident in metadata['redirects']: call_ident = metadata['redirects'][call_ident]
if not call_ident.startswith('_') and not call_ident.startswith('Math_'): call_ident = '_' + call_ident
code = call_ident + '(' + coerced_params + ')'
if sig[0] != 'v':
# ffis cannot return float
if sig[0] == 'f': code = '+' + code
code = 'return ' + shared.JS.make_coercion(code, sig[0], settings)
code += ';'
Counter.pre.append(make_func(item + '__wrapper', code))
return item + '__wrapper'
return item if not newline else (item + '\n')
if settings['ASSERTIONS'] >= 2:
debug_tables[sig] = body
body = ','.join(map(fix_item, body))
return ('\n'.join(Counter.pre), ''.join([raw[:start+1], body, raw[end:]]))
infos = [make_table(sig, raw) for sig, raw in last_forwarded_json['Functions']['tables'].iteritems()]
Counter.pre = []
function_tables_defs = '\n'.join([info[0] for info in infos]) + '\n// EMSCRIPTEN_END_FUNCS\n' + '\n'.join([info[1] for info in infos])
asm_setup = ''
maths = ['Math.' + func for func in ['floor', 'abs', 'sqrt', 'pow', 'cos', 'sin', 'tan', 'acos', 'asin', 'atan', 'atan2', 'exp', 'log', 'ceil', 'imul']]
fundamentals = ['Math', 'Int8Array', 'Int16Array', 'Int32Array', 'Uint8Array', 'Uint16Array', 'Uint32Array', 'Float32Array', 'Float64Array']
math_envs = ['Math.min'] # TODO: move min to maths
asm_setup += '\n'.join(['var %s = %s;' % (f.replace('.', '_'), f) for f in math_envs])
if settings['PRECISE_F32']: maths += ['Math.fround']
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basic_funcs = ['abort', 'assert'] + [m.replace('.', '_') for m in math_envs]
if settings['RESERVED_FUNCTION_POINTERS'] > 0: basic_funcs.append('jsCall')
if settings['SAFE_HEAP']: basic_funcs += ['SAFE_HEAP_LOAD', 'SAFE_HEAP_STORE', 'SAFE_FT_MASK']
if settings['CHECK_HEAP_ALIGN']: basic_funcs += ['CHECK_ALIGN_2', 'CHECK_ALIGN_4', 'CHECK_ALIGN_8']
if settings['ASSERTIONS']:
if settings['ASSERTIONS'] >= 2: import difflib
for sig in last_forwarded_json['Functions']['tables'].iterkeys():
basic_funcs += ['nullFunc_' + sig]
if settings['ASSERTIONS'] <= 1:
extra = ' Module["printErr"]("Build with ASSERTIONS=2 for more info.");'
pointer = ' '
else:
pointer = ' \'" + x + "\' '
asm_setup += '\nvar debug_table_' + sig + ' = ' + json.dumps(debug_tables[sig]) + ';'
extra = ' Module["printErr"]("This pointer might make sense in another type signature: '
# sort signatures, attempting to show most likely related ones first
sigs = last_forwarded_json['Functions']['tables'].keys()
def keyfunc(other):
ret = 0
minlen = min(len(other), len(sig))
maxlen = min(len(other), len(sig))
if other.startswith(sig) or sig.startswith(other): ret -= 1000 # prioritize prefixes, could be dropped params
ret -= 133*difflib.SequenceMatcher(a=other, b=sig).ratio() # prioritize on diff similarity
ret += 15*abs(len(other) - len(sig))/float(maxlen) # deprioritize the bigger the length difference is
for i in range(minlen):
if other[i] == sig[i]: ret -= 5/float(maxlen) # prioritize on identically-placed params
ret += 20*len(other) # deprioritize on length
return ret
sigs.sort(key=keyfunc)
for other in sigs:
if other != sig:
extra += other + ': " + debug_table_' + other + '[x] + " '
extra += '"); '
asm_setup += '\nfunction nullFunc_' + sig + '(x) { Module["printErr"]("Invalid function pointer' + pointer + 'called with signature \'' + sig + '\'. ' + \
'Perhaps this is an invalid value (e.g. caused by calling a virtual method on a NULL pointer)? ' + \
'Or calling a function with an incorrect type, which will fail? ' + \
'(it is worth building your source files with -Werror (warnings are errors), as warnings can indicate undefined behavior which can cause this)' + \
'"); ' + extra + ' abort(x) }\n'
basic_vars = ['STACKTOP', 'STACK_MAX', 'tempDoublePtr', 'ABORT']
basic_float_vars = ['NaN', 'Infinity']
if metadata.get('preciseI64MathUsed'):
basic_vars += ['cttz_i8', 'ctlz_i8']
else:
if forwarded_json['Functions']['libraryFunctions'].get('_llvm_cttz_i32'):
basic_vars += ['cttz_i8']
if forwarded_json['Functions']['libraryFunctions'].get('_llvm_ctlz_i32'):
basic_vars += ['ctlz_i8']
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if settings.get('DLOPEN_SUPPORT'):
for sig in last_forwarded_json['Functions']['tables'].iterkeys():
basic_vars.append('F_BASE_%s' % sig)
asm_setup += ' var F_BASE_%s = %s;\n' % (sig, 'FUNCTION_TABLE_OFFSET' if settings.get('SIDE_MODULE') else '0') + '\n'
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asm_runtime_funcs = ['stackAlloc', 'stackSave', 'stackRestore', 'setThrew', 'setTempRet0', 'getTempRet0']
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# See if we need ASYNCIFY functions
# We might not need them even if ASYNCIFY is enabled
need_asyncify = '_emscripten_alloc_async_context' in exported_implemented_functions
if need_asyncify:
basic_vars += ['___async', '___async_unwind', '___async_retval', '___async_cur_frame']
asm_runtime_funcs += ['setAsync']
# function tables
function_tables = ['dynCall_' + table for table in last_forwarded_json['Functions']['tables']]
function_tables_impls = []
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for sig in last_forwarded_json['Functions']['tables'].iterkeys():
args = ','.join(['a' + str(i) for i in range(1, len(sig))])
arg_coercions = ' '.join(['a' + str(i) + '=' + shared.JS.make_coercion('a' + str(i), sig[i], settings) + ';' for i in range(1, len(sig))])
coerced_args = ','.join([shared.JS.make_coercion('a' + str(i), sig[i], settings) for i in range(1, len(sig))])
ret = ('return ' if sig[0] != 'v' else '') + shared.JS.make_coercion('FUNCTION_TABLE_%s[index&{{{ FTM_%s }}}](%s)' % (sig, sig, coerced_args), sig[0], settings)
function_tables_impls.append('''
function dynCall_%s(index%s%s) {
index = index|0;
%s
%s;
}
''' % (sig, ',' if len(sig) > 1 else '', args, arg_coercions, ret))
ffi_args = ','.join([shared.JS.make_coercion('a' + str(i), sig[i], settings, ffi_arg=True) for i in range(1, len(sig))])
for i in range(settings['RESERVED_FUNCTION_POINTERS']):
jsret = ('return ' if sig[0] != 'v' else '') + shared.JS.make_coercion('jsCall(%d%s%s)' % (i, ',' if ffi_args else '', ffi_args), sig[0], settings, ffi_result=True)
function_tables_impls.append('''
function jsCall_%s_%s(%s) {
%s
%s;
}
''' % (sig, i, args, arg_coercions, jsret))
shared.Settings.copy(settings)
asm_setup += '\n' + shared.JS.make_invoke(sig) + '\n'
basic_funcs.append('invoke_%s' % sig)
if settings.get('DLOPEN_SUPPORT'):
asm_setup += '\n' + shared.JS.make_extcall(sig) + '\n'
basic_funcs.append('extCall_%s' % sig)
def quote(prop):
if settings['CLOSURE_COMPILER'] == 2:
return "'" + prop + "'"
else:
return prop
def access_quote(prop):
if settings['CLOSURE_COMPILER'] == 2:
return "['" + prop + "']"
else:
return '.' + prop
# calculate exports
exported_implemented_functions = list(exported_implemented_functions) + metadata['initializers']
exported_implemented_functions.append('runPostSets')
exports = []
for export in exported_implemented_functions + asm_runtime_funcs + function_tables:
exports.append(quote(export) + ": " + export)
exports = '{ ' + ', '.join(exports) + ' }'
# calculate globals
try:
del forwarded_json['Variables']['globals']['_llvm_global_ctors'] # not a true variable
except:
pass
# If no named globals, only need externals
global_vars = metadata['externs'] #+ forwarded_json['Variables']['globals']
global_funcs = list(set([key for key, value in forwarded_json['Functions']['libraryFunctions'].iteritems() if value != 2]).difference(set(global_vars)).difference(implemented_functions))
def math_fix(g):
return g if not g.startswith('Math_') else g.split('_')[1]
asm_global_funcs = ''.join([' var ' + g.replace('.', '_') + '=global' + access_quote(g) + ';\n' for g in maths]) + \
''.join([' var ' + g + '=env' + access_quote(math_fix(g)) + ';\n' for g in basic_funcs + global_funcs])
asm_global_vars = ''.join([' var ' + g + '=env' + access_quote(g) + '|0;\n' for g in basic_vars + global_vars])
# In linkable modules, we need to add some explicit globals for global variables that can be linked and used across modules
if settings.get('MAIN_MODULE') or settings.get('SIDE_MODULE'):
assert settings.get('TARGET_ASMJS_UNKNOWN_EMSCRIPTEN'), 'TODO: support x86 target when linking modules (needs offset of 4 and not 8 here)'
for key, value in forwarded_json['Variables']['globals'].iteritems():
if value.get('linkable'):
init = forwarded_json['Variables']['indexedGlobals'][key] + 8 # 8 is Runtime.GLOBAL_BASE / STATIC_BASE
if settings.get('SIDE_MODULE'): init = '(H_BASE+' + str(init) + ')|0'
asm_global_vars += ' var %s=%s;\n' % (key, str(init))
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if settings['POINTER_MASKING']:
for i in [0, 1, 2, 3]:
asm_global_vars += ' var MASK%d=%d;\n' % (i, (settings['TOTAL_MEMORY']-1) & (~((2**i)-1)));
# sent data
the_global = '{ ' + ', '.join(['"' + math_fix(s) + '": ' + s for s in fundamentals]) + ' }'
sending = '{ ' + ', '.join(['"' + math_fix(s) + '": ' + s for s in basic_funcs + global_funcs + basic_vars + basic_float_vars + global_vars]) + ' }'
# received
receiving = ''
if settings['ASSERTIONS']:
# assert on the runtime being in a valid state when calling into compiled code. The only exceptions are
# some support code like malloc TODO: verify that malloc is actually safe to use that way
receiving = '\n'.join(['var real_' + s + ' = asm["' + s + '"]; asm["' + s + '''"] = function() {
assert(runtimeInitialized, 'you need to wait for the runtime to be ready (e.g. wait for main() to be called)');
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assert(!runtimeExited, 'the runtime was exited (use NO_EXIT_RUNTIME to keep it alive after main() exits)');
return real_''' + s + '''.apply(null, arguments);
};
''' for s in exported_implemented_functions if s not in ['_malloc', '_free', '_memcpy', '_memset']])
receiving += ';\n'.join(['var ' + s + ' = Module["' + s + '"] = asm["' + s + '"]' for s in exported_implemented_functions + function_tables])
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# finalize
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if DEBUG: logging.debug('asm text sizes' + str([map(len, funcs_js), len(asm_setup), len(asm_global_vars), len(asm_global_funcs), len(pre_tables), len('\n'.join(function_tables_impls)), len(function_tables_defs.replace('\n', '\n ')), len(exports), len(the_global), len(sending), len(receiving)]))
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funcs_js = ['''
%s
// EMSCRIPTEN_START_ASM
var asm = (function(global, env, buffer) {
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%s
var HEAP8 = new global%s(buffer);
var HEAP16 = new global%s(buffer);
var HEAP32 = new global%s(buffer);
var HEAPU8 = new global%s(buffer);
var HEAPU16 = new global%s(buffer);
var HEAPU32 = new global%s(buffer);
var HEAPF32 = new global%s(buffer);
var HEAPF64 = new global%s(buffer);
''' % (asm_setup, "'use asm';" if not metadata.get('hasInlineJS') and not settings['SIDE_MODULE'] and settings['ASM_JS'] == 1 else "'almost asm';",
access_quote('Int8Array'),
access_quote('Int16Array'),
access_quote('Int32Array'),
access_quote('Uint8Array'),
access_quote('Uint16Array'),
access_quote('Uint32Array'),
access_quote('Float32Array'),
access_quote('Float64Array')) + '\n' + asm_global_vars + '''
var __THREW__ = 0;
var threwValue = 0;
var setjmpId = 0;
var undef = 0;
var nan = +env.NaN, inf = +env.Infinity;
var tempInt = 0, tempBigInt = 0, tempBigIntP = 0, tempBigIntS = 0, tempBigIntR = 0.0, tempBigIntI = 0, tempBigIntD = 0, tempValue = 0, tempDouble = 0.0;
''' + ''.join(['''
var tempRet%d = 0;''' % i for i in range(10)]) + '\n' + asm_global_funcs] + [' var tempFloat = %s;\n' % ('Math_fround(0)' if settings.get('PRECISE_F32') else '0.0')] + ([' const f0 = Math_fround(0);\n'] if settings.get('PRECISE_F32') else []) + ['''
// EMSCRIPTEN_START_FUNCS
function stackAlloc(size) {
size = size|0;
var ret = 0;
ret = STACKTOP;
STACKTOP = (STACKTOP + size)|0;
''' + ('STACKTOP = (STACKTOP + 3)&-4;' if settings['TARGET_X86'] else 'STACKTOP = (STACKTOP + 15)&-16;\n') +
('if ((STACKTOP|0) >= (STACK_MAX|0)) abort();\n' if settings['ASSERTIONS'] else '') + '''
return ret|0;
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}
function stackSave() {
return STACKTOP|0;
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}
function stackRestore(top) {
top = top|0;
STACKTOP = top;
}
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''' + ('''
function setAsync() {
___async = 1;
}''' if need_asyncify else '') + '''
function setThrew(threw, value) {
threw = threw|0;
value = value|0;
if ((__THREW__|0) == 0) {
__THREW__ = threw;
threwValue = value;
}
}
function copyTempFloat(ptr) {
ptr = ptr|0;
HEAP8[tempDoublePtr>>0] = HEAP8[ptr>>0];
HEAP8[tempDoublePtr+1>>0] = HEAP8[ptr+1>>0];
HEAP8[tempDoublePtr+2>>0] = HEAP8[ptr+2>>0];
HEAP8[tempDoublePtr+3>>0] = HEAP8[ptr+3>>0];
}
function copyTempDouble(ptr) {
ptr = ptr|0;
HEAP8[tempDoublePtr>>0] = HEAP8[ptr>>0];
HEAP8[tempDoublePtr+1>>0] = HEAP8[ptr+1>>0];
HEAP8[tempDoublePtr+2>>0] = HEAP8[ptr+2>>0];
HEAP8[tempDoublePtr+3>>0] = HEAP8[ptr+3>>0];
HEAP8[tempDoublePtr+4>>0] = HEAP8[ptr+4>>0];
HEAP8[tempDoublePtr+5>>0] = HEAP8[ptr+5>>0];
HEAP8[tempDoublePtr+6>>0] = HEAP8[ptr+6>>0];
HEAP8[tempDoublePtr+7>>0] = HEAP8[ptr+7>>0];
}
function setTempRet0(value) {
value = value|0;
tempRet0 = value;
}
function getTempRet0() {
return tempRet0|0;
}
'''] + funcs_js + ['''
%s
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return %s;
})
// EMSCRIPTEN_END_ASM
(%s, %s, buffer);
%s;
''' % (pre_tables + '\n'.join(function_tables_impls) + '\n' + function_tables_defs.replace('\n', '\n '), exports, the_global, sending, receiving)]
if not settings.get('SIDE_MODULE'):
funcs_js.append('''
Runtime.stackAlloc = asm['stackAlloc'];
Runtime.stackSave = asm['stackSave'];
Runtime.stackRestore = asm['stackRestore'];
Runtime.setTempRet0 = asm['setTempRet0'];
Runtime.getTempRet0 = asm['getTempRet0'];
''')
# Set function table masks
masks = {}
max_mask = 0
for sig, table in last_forwarded_json['Functions']['tables'].iteritems():
mask = table.count(',')
masks[sig] = str(mask)
max_mask = max(mask, max_mask)
def function_table_maskize(js, masks):
def fix(m):
sig = m.groups(0)[0]
return masks[sig]
return re.sub(r'{{{ FTM_([\w\d_$]+) }}}', lambda m: fix(m), js) # masks[m.groups(0)[0]]
funcs_js = map(lambda js: function_table_maskize(js, masks), funcs_js)
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if settings.get('DLOPEN_SUPPORT'):
funcs_js.append('''
asm.maxFunctionIndex = %(max_mask)d;
DLFCN.registerFunctions(asm, %(max_mask)d+1, %(sigs)s, Module);
Module.SYMBOL_TABLE = SYMBOL_TABLE;
''' % { 'max_mask': max_mask, 'sigs': str(map(str, last_forwarded_json['Functions']['tables'].keys())) })
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else:
function_tables_defs = '\n'.join([table for table in last_forwarded_json['Functions']['tables'].itervalues()])
outfile.write(function_tables_defs)
funcs_js = ['''
// EMSCRIPTEN_START_FUNCS
'''] + funcs_js + ['''
// EMSCRIPTEN_END_FUNCS
''']
# Create symbol table for self-dlopen
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if settings.get('DLOPEN_SUPPORT'):
symbol_table = {}
for k, v in forwarded_json['Variables']['indexedGlobals'].iteritems():
if forwarded_json['Variables']['globals'][k]['named']:
symbol_table[k] = str(v + forwarded_json['Runtime']['GLOBAL_BASE'])
for raw in last_forwarded_json['Functions']['tables'].itervalues():
if raw == '': continue
table = map(string.strip, raw[raw.find('[')+1:raw.find(']')].split(","))
for i in range(len(table)):
value = table[i]
if value != '0':
if settings.get('SIDE_MODULE'):
symbol_table[value] = 'FUNCTION_TABLE_OFFSET+' + str(i)
else:
symbol_table[value] = str(i)
outfile.write("var SYMBOL_TABLE = %s;" % json.dumps(symbol_table).replace('"', ''))
for i in range(len(funcs_js)): # do this loop carefully to save memory
if WINDOWS: funcs_js[i] = funcs_js[i].replace('\r\n', '\n') # Normalize to UNIX line endings, otherwise writing to text file will duplicate \r\n to \r\r\n!
outfile.write(funcs_js[i])
funcs_js = None
if WINDOWS: post = post.replace('\r\n', '\n') # Normalize to UNIX line endings, otherwise writing to text file will duplicate \r\n to \r\r\n!
outfile.write(post)
outfile.close()
if DEBUG: logging.debug(' emscript: final python processing took %s seconds' % (time.time() - t))
success = True
finally:
if not success:
outfile.close()
shared.try_delete(outfile.name) # remove partial output
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if os.environ.get('EMCC_FAST_COMPILER') != '0':
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emscript = emscript_fast
def main(args, compiler_engine, cache, jcache, relooper, temp_files, DEBUG, DEBUG_CACHE):
# Prepare settings for serialization to JSON.
settings = {}
for setting in args.settings:
name, value = setting.strip().split('=', 1)
settings[name] = json.loads(value)
# libraries
libraries = args.libraries[0].split(',') if len(args.libraries) > 0 else []
# Compile the assembly to Javascript.
if settings.get('RELOOP'):
if not relooper:
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relooper = settings.get('RELOOPER')
if not relooper:
relooper = cache.get_path('relooper.js')
settings.setdefault('RELOOPER', relooper)
if not os.path.exists(relooper):
shared.Building.ensure_relooper(relooper)
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settings.setdefault('STRUCT_INFO', cache.get_path('struct_info.compiled.json'))
struct_info = settings.get('STRUCT_INFO')
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if not os.path.exists(struct_info):
shared.Building.ensure_struct_info(struct_info)
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emscript(args.infile, settings, args.outfile, libraries, compiler_engine=compiler_engine,
jcache=jcache, temp_files=temp_files, DEBUG=DEBUG, DEBUG_CACHE=DEBUG_CACHE)
def _main(environ):
response_file = True
while response_file:
response_file = None
for index in range(1, len(sys.argv)):
if sys.argv[index][0] == '@':
# found one, loop again next time
response_file = True
response_file_args = read_response_file(sys.argv[index])
# slice in extra_args in place of the response file arg
sys.argv[index:index+1] = response_file_args
break
parser = optparse.OptionParser(
usage='usage: %prog [-h] [-H HEADERS] [-o OUTFILE] [-c COMPILER_ENGINE] [-s FOO=BAR]* infile',
description=('You should normally never use this! Use emcc instead. '
'This is a wrapper around the JS compiler, converting .ll to .js.'),
epilog='')
parser.add_option('-H', '--headers',
default=[],
action='append',
help='System headers (comma separated) whose #defines should be exposed to the compiled code.')
parser.add_option('-L', '--libraries',
default=[],
action='append',
help='Library files (comma separated) to use in addition to those in emscripten src/library_*.')
parser.add_option('-o', '--outfile',
default=sys.stdout,
help='Where to write the output; defaults to stdout.')
parser.add_option('-c', '--compiler',
default=None,
help='Which JS engine to use to run the compiler; defaults to the one in ~/.emscripten.')
parser.add_option('--relooper',
default=None,
help='Which relooper file to use if RELOOP is enabled.')
parser.add_option('-s', '--setting',
dest='settings',
default=[],
action='append',
metavar='FOO=BAR',
help=('Overrides for settings defined in settings.js. '
'May occur multiple times.'))
2012-11-17 23:26:58 +04:00
parser.add_option('-j', '--jcache',
action='store_true',
default=False,
help=('Enable jcache (ccache-like caching of compilation results, for faster incremental builds).'))
parser.add_option('-T', '--temp-dir',
default=None,
help=('Where to create temporary files.'))
parser.add_option('-v', '--verbose',
action='store_true',
dest='verbose',
help='Displays debug output')
parser.add_option('-q', '--quiet',
action='store_false',
dest='verbose',
help='Hides debug output')
parser.add_option('--suppressUsageWarning',
action='store_true',
default=environ.get('EMSCRIPTEN_SUPPRESS_USAGE_WARNING'),
help=('Suppress usage warning'))
# Convert to the same format that argparse would have produced.
keywords, positional = parser.parse_args()
if not keywords.suppressUsageWarning:
logging.warning('''
==============================================================
WARNING: You should normally never use this! Use emcc instead.
==============================================================
''')
if len(positional) != 1:
raise RuntimeError('Must provide exactly one positional argument. Got ' + str(len(positional)) + ': "' + '", "'.join(positional) + '"')
keywords.infile = os.path.abspath(positional[0])
if isinstance(keywords.outfile, basestring):
keywords.outfile = open(keywords.outfile, 'w')
if keywords.relooper:
relooper = os.path.abspath(keywords.relooper)
else:
relooper = None # use the cache
if keywords.temp_dir is None:
temp_files = get_configuration().get_temp_files()
temp_dir = get_configuration().TEMP_DIR
else:
temp_dir = os.path.abspath(keywords.temp_dir)
if not os.path.exists(temp_dir):
os.makedirs(temp_dir)
temp_files = tempfiles.TempFiles(temp_dir)
if keywords.compiler is None:
keywords.compiler = shared.COMPILER_ENGINE
if keywords.verbose is None:
DEBUG = get_configuration().DEBUG
DEBUG_CACHE = get_configuration().DEBUG_CACHE
else:
DEBUG = keywords.verbose
DEBUG_CACHE = keywords.verbose
cache = cache_module.Cache()
temp_files.run_and_clean(lambda: main(
keywords,
compiler_engine=keywords.compiler,
cache=cache,
jcache=cache_module.JCache(cache) if keywords.jcache else None,
relooper=relooper,
temp_files=temp_files,
DEBUG=DEBUG,
DEBUG_CACHE=DEBUG_CACHE,
))
if __name__ == '__main__':
_main(environ=os.environ)