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#!/usr/bin/env python
"""
Run lldb to disassemble all the available functions for an executable image.
"""
import os
import sys
from optparse import OptionParser
def setupSysPath():
"""
Add LLDB.framework/Resources/Python and the test dir to the sys.path.
"""
# Get the directory containing the current script.
scriptPath = sys.path[0]
if not scriptPath.endswith(os.path.join('utils', 'test')):
print "This script expects to reside in lldb's utils/test directory."
sys.exit(-1)
# This is our base name component.
base = os.path.abspath(os.path.join(scriptPath, os.pardir, os.pardir))
# This is for the goodies in the test directory under base.
sys.path.append(os.path.join(base,'test'))
# These are for xcode build directories.
xcode3_build_dir = ['build']
xcode4_build_dir = ['build', 'lldb', 'Build', 'Products']
dbg = ['Debug']
rel = ['Release']
bai = ['BuildAndIntegration']
python_resource_dir = ['LLDB.framework', 'Resources', 'Python']
dbgPath = os.path.join(base, *(xcode3_build_dir + dbg + python_resource_dir))
dbgPath2 = os.path.join(base, *(xcode4_build_dir + dbg + python_resource_dir))
relPath = os.path.join(base, *(xcode3_build_dir + rel + python_resource_dir))
relPath2 = os.path.join(base, *(xcode4_build_dir + rel + python_resource_dir))
baiPath = os.path.join(base, *(xcode3_build_dir + bai + python_resource_dir))
baiPath2 = os.path.join(base, *(xcode4_build_dir + bai + python_resource_dir))
lldbPath = None
if os.path.isfile(os.path.join(dbgPath, 'lldb.py')):
lldbPath = dbgPath
elif os.path.isfile(os.path.join(dbgPath2, 'lldb.py')):
lldbPath = dbgPath2
elif os.path.isfile(os.path.join(relPath, 'lldb.py')):
lldbPath = relPath
elif os.path.isfile(os.path.join(relPath2, 'lldb.py')):
lldbPath = relPath2
elif os.path.isfile(os.path.join(baiPath, 'lldb.py')):
lldbPath = baiPath
elif os.path.isfile(os.path.join(baiPath2, 'lldb.py')):
lldbPath = baiPath2
if not lldbPath:
print 'This script requires lldb.py to be in either ' + dbgPath + ',',
print relPath + ', or ' + baiPath
sys.exit(-1)
# This is to locate the lldb.py module. Insert it right after sys.path[0].
sys.path[1:1] = [lldbPath]
print "sys.path:", sys.path
def run_command(ci, cmd, res, echoInput=True, echoOutput=True):
if echoInput:
print "run command:", cmd
ci.HandleCommand(cmd, res)
if res.Succeeded():
if echoOutput:
print "run_command output:", res.GetOutput()
else:
if echoOutput:
print "run command failed!"
print "run_command error:", res.GetError()
def do_lldb_disassembly(lldb_commands, exe, disassemble_options, num_symbols, symbols_to_disassemble):
import lldb, atexit, re
# Create the debugger instance now.
dbg = lldb.SBDebugger.Create()
if not dbg.IsValid():
raise Exception('Invalid debugger instance')
# Register an exit callback.
atexit.register(lambda: lldb.SBDebugger.Terminate())
# We want our debugger to be synchronous.
dbg.SetAsync(False)
# Get the command interpreter from the debugger.
ci = dbg.GetCommandInterpreter()
if not ci:
raise Exception('Could not get the command interpreter')
# And the associated result object.
res = lldb.SBCommandReturnObject()
# See if there any extra command(s) to execute before we issue the file command.
for cmd in lldb_commands:
run_command(ci, cmd, res)
# Now issue the file command.
run_command(ci, 'file %s' % exe, res)
# Create a target.
#target = dbg.CreateTarget(exe)
target = dbg.GetSelectedTarget()
stream = lldb.SBStream()
def IsCodeType(symbol):
"""Check whether an SBSymbol represents code."""
return symbol.GetType() == lldb.eSymbolTypeCode
# Define a generator for the symbols to disassemble.
def symbol_iter(num, symbols, target):
# If we specify the symbols to disassemble, ignore symbol table dump.
if symbols:
for i in range(len(symbols)):
print "symbol:", symbols[i]
yield symbols[i]
else:
limited = True if num != -1 else False
if limited:
count = 0
stream = lldb.SBStream()
for m in target.module_iter():
print "module:", m
for s in m:
if limited and count >= num:
return
print "symbol:", s.GetName()
if IsCodeType(s):
if limited:
count = count + 1
print "returning symbol:", s.GetName()
yield s.GetName()
#print "start address:", s.GetStartAddress()
#print "end address:", s.GetEndAddress()
#s.GetDescription(stream)
#print "symbol description:", stream.GetData()
#stream.Clear()
# Disassembly time.
for symbol in symbol_iter(num_symbols, symbols_to_disassemble, target):
cmd = "disassemble %s '%s'" % (disassemble_options, symbol)
run_command(ci, cmd, res)
def main():
# This is to set up the Python path to include the pexpect-2.4 dir.
# Remember to update this when/if things change.
scriptPath = sys.path[0]
sys.path.append(os.path.join(scriptPath, os.pardir, os.pardir, 'test', 'pexpect-2.4'))
parser = OptionParser(usage="""\
Run lldb to disassemble all the available functions for an executable image.
Usage: %prog [options]
""")
parser.add_option('-C', '--lldb-command',
type='string', action='append', metavar='COMMAND',
default=[], dest='lldb_commands',
help='Command(s) lldb executes after starting up (can be empty)')
parser.add_option('-e', '--executable',
type='string', action='store',
dest='executable',
help="""Mandatory: the executable to do disassembly on.""")
parser.add_option('-o', '--options',
type='string', action='store',
dest='disassemble_options',
help="""Mandatory: the options passed to lldb's 'disassemble' command.""")
parser.add_option('-n', '--num-symbols',
type='int', action='store', default=-1,
dest='num_symbols',
help="""The number of symbols to disassemble, if specified.""")
parser.add_option('-s', '--symbol',
type='string', action='append', metavar='SYMBOL', default=[],
dest='symbols_to_disassemble',
help="""The symbol(s) to invoke lldb's 'disassemble' command on, if specified.""")
opts, args = parser.parse_args()
lldb_commands = opts.lldb_commands
if not opts.executable or not opts.disassemble_options:
parser.print_help()
sys.exit(1)
executable = opts.executable
disassemble_options = opts.disassemble_options
num_symbols = opts.num_symbols
symbols_to_disassemble = opts.symbols_to_disassemble
# We have parsed the options.
print "lldb commands:", lldb_commands
print "executable:", executable
print "disassemble options:", disassemble_options
print "num of symbols to disassemble:", num_symbols
print "symbols to disassemble:", symbols_to_disassemble
setupSysPath()
do_lldb_disassembly(lldb_commands, executable, disassemble_options, num_symbols, symbols_to_disassemble)
if __name__ == '__main__':
main()
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