gecko-dev/xpcom/stub/dependentlibs.py

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4.5 KiB
Python
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# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
'''Given a library, dependentlibs.py prints the list of libraries it depends
upon that are in the same directory.
'''
from optparse import OptionParser
import os
import re
import fnmatch
import subprocess
import sys
TOOLCHAIN_PREFIX = ''
def dependentlibs_dumpbin(lib):
'''Returns the list of dependencies declared in the given DLL'''
try:
proc = subprocess.Popen(['dumpbin', '-dependents', lib], stdout = subprocess.PIPE)
except OSError:
# dumpbin is missing, probably mingw compilation. Try using objdump.
return dependentlibs_mingw_objdump(lib)
deps = []
for line in proc.stdout:
# Each line containing an imported library name starts with 4 spaces
match = re.match(' (\S+)', line)
if match:
deps.append(match.group(1))
elif len(deps):
# There may be several groups of library names, but only the
# first one is interesting. The second one is for delayload-ed
# libraries.
break
proc.wait()
return deps
def dependentlibs_mingw_objdump(lib):
proc = subprocess.Popen(['objdump', '-x', lib], stdout = subprocess.PIPE)
deps = []
for line in proc.stdout:
match = re.match('\tDLL Name: (\S+)', line)
if match:
deps.append(match.group(1))
proc.wait()
return deps
def dependentlibs_readelf(lib):
'''Returns the list of dependencies declared in the given ELF .so'''
proc = subprocess.Popen([TOOLCHAIN_PREFIX + 'readelf', '-d', lib], stdout = subprocess.PIPE)
deps = []
for line in proc.stdout:
# Each line has the following format:
# tag (TYPE) value
# Looking for NEEDED type entries
tmp = line.split(' ', 3)
if len(tmp) > 3 and tmp[2] == '(NEEDED)':
# NEEDED lines look like:
# 0x00000001 (NEEDED) Shared library: [libname]
match = re.search('\[(.*)\]', tmp[3])
if match:
deps.append(match.group(1))
proc.wait()
return deps
def dependentlibs_otool(lib):
'''Returns the list of dependencies declared in the given MACH-O dylib'''
proc = subprocess.Popen(['otool', '-l', lib], stdout = subprocess.PIPE)
deps= []
cmd = None
for line in proc.stdout:
# otool -l output contains many different things. The interesting data
# is under "Load command n" sections, with the content:
# cmd LC_LOAD_DYLIB
# cmdsize 56
# name libname (offset 24)
tmp = line.split()
if len(tmp) < 2:
continue
if tmp[0] == 'cmd':
cmd = tmp[1]
elif cmd == 'LC_LOAD_DYLIB' and tmp[0] == 'name':
deps.append(re.sub('^@executable_path/','',tmp[1]))
proc.wait()
return deps
def dependentlibs(lib, libpaths, func):
'''For a given library, returns the list of recursive dependencies that can
be found in the given list of paths'''
assert(libpaths)
assert(isinstance(libpaths, list))
deps = []
for dep in func(lib):
if dep in deps or os.path.isabs(dep):
continue
for dir in libpaths:
deppath = os.path.join(dir, dep)
if os.path.exists(deppath):
deps.extend([d for d in dependentlibs(deppath, libpaths, func) if not d in deps])
deps.append(dep)
break
return deps
def main():
parser = OptionParser()
parser.add_option("-L", dest="libpaths", action="append", metavar="PATH", help="Add the given path to the library search path")
parser.add_option("-p", dest="toolchain_prefix", metavar="PREFIX", help="Use the given prefix to readelf")
(options, args) = parser.parse_args()
if options.toolchain_prefix:
global TOOLCHAIN_PREFIX
TOOLCHAIN_PREFIX = options.toolchain_prefix
lib = args[0]
ext = os.path.splitext(lib)[1]
if ext == '.dll':
func = dependentlibs_dumpbin
elif ext == '.so' or fnmatch.fnmatch(lib, '*.so.*'):
func = dependentlibs_readelf
elif ext == '.dylib':
func = dependentlibs_otool
if not options.libpaths:
options.libpaths = [os.path.dirname(lib)]
print '\n'.join(dependentlibs(lib, options.libpaths, func))
if __name__ == '__main__':
main()