author Mike Hommey <mh+mozilla@glandium.org>
Wed, 20 Mar 2013 23:59:45 +0100
changeset 125704 4d3c7024506b5d49d62e0eaef95011f0e386f4b6
child 127435 872c29501019d020a444538a3c234e0adc63a1ed
permissions -rw-r--r--
Backout changeset f12e5c87adf6 (bug 852950) because it breaks running from dist/bin

# 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
from mozpack.executables import (


def dependentlibs_dumpbin(lib):
    '''Returns the list of dependencies declared in the given DLL'''
        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:
        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.
    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:
    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:
    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:
        if tmp[0] == 'cmd':
            cmd = tmp[1]
        elif cmd == 'LC_LOAD_DYLIB' and tmp[0] == 'name':
    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(isinstance(libpaths, list))
    deps = []
    for dep in func(lib):
        if dep in deps or os.path.isabs(dep):
        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])

    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]
    binary_type = get_type(lib)
    if binary_type == ELF:
        func = dependentlibs_readelf
    elif binary_type == MACHO:
        func = dependentlibs_otool
        ext = os.path.splitext(lib)[1]
        assert(ext == '.dll')
        func = dependentlibs_dumpbin
    if not options.libpaths:
        options.libpaths = [os.path.dirname(lib)]

    print '\n'.join(dependentlibs(lib, options.libpaths, func))

if __name__ == '__main__':