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Diffstat (limited to 'examples/python/process_events.py')
| -rwxr-xr-x | examples/python/process_events.py | 278 |
1 files changed, 278 insertions, 0 deletions
diff --git a/examples/python/process_events.py b/examples/python/process_events.py new file mode 100755 index 000000000000..e8ccc5f90230 --- /dev/null +++ b/examples/python/process_events.py @@ -0,0 +1,278 @@ +#!/usr/bin/python + +#---------------------------------------------------------------------- +# Be sure to add the python path that points to the LLDB shared library. +# On MacOSX csh, tcsh: +# setenv PYTHONPATH /Applications/Xcode.app/Contents/SharedFrameworks/LLDB.framework/Resources/Python +# On MacOSX sh, bash: +# export PYTHONPATH=/Applications/Xcode.app/Contents/SharedFrameworks/LLDB.framework/Resources/Python +#---------------------------------------------------------------------- + +import commands +import optparse +import os +import platform +import sys + +#---------------------------------------------------------------------- +# Code that auto imports LLDB +#---------------------------------------------------------------------- +try: + # Just try for LLDB in case PYTHONPATH is already correctly setup + import lldb +except ImportError: + lldb_python_dirs = list() + # lldb is not in the PYTHONPATH, try some defaults for the current platform + platform_system = platform.system() + if platform_system == 'Darwin': + # On Darwin, try the currently selected Xcode directory + xcode_dir = commands.getoutput("xcode-select --print-path") + if xcode_dir: + lldb_python_dirs.append(os.path.realpath(xcode_dir + '/../SharedFrameworks/LLDB.framework/Resources/Python')) + lldb_python_dirs.append(xcode_dir + '/Library/PrivateFrameworks/LLDB.framework/Resources/Python') + lldb_python_dirs.append('/System/Library/PrivateFrameworks/LLDB.framework/Resources/Python') + success = False + for lldb_python_dir in lldb_python_dirs: + if os.path.exists(lldb_python_dir): + if not (sys.path.__contains__(lldb_python_dir)): + sys.path.append(lldb_python_dir) + try: + import lldb + except ImportError: + pass + else: + print 'imported lldb from: "%s"' % (lldb_python_dir) + success = True + break + if not success: + print "error: couldn't locate the 'lldb' module, please set PYTHONPATH correctly" + sys.exit(1) + +def print_threads(process, options): + if options.show_threads: + for thread in process: + print '%s %s' % (thread, thread.GetFrameAtIndex(0)) + +def run_commands(command_interpreter, commands): + return_obj = lldb.SBCommandReturnObject() + for command in commands: + command_interpreter.HandleCommand( command, return_obj ) + if return_obj.Succeeded(): + print return_obj.GetOutput() + else: + print return_obj + if options.stop_on_error: + break + +def main(argv): + description='''Debugs a program using the LLDB python API and uses asynchronous broadcast events to watch for process state changes.''' + epilog='''Examples: + +#---------------------------------------------------------------------- +# Run "/bin/ls" with the arguments "-lAF /tmp/", and set a breakpoint +# at "malloc" and backtrace and read all registers each time we stop +#---------------------------------------------------------------------- +% ./process_events.py --breakpoint malloc --stop-command bt --stop-command 'register read' -- /bin/ls -lAF /tmp/ + +''' + optparse.OptionParser.format_epilog = lambda self, formatter: self.epilog + parser = optparse.OptionParser(description=description, prog='process_events',usage='usage: process_events [options] program [arg1 arg2]', epilog=epilog) + parser.add_option('-v', '--verbose', action='store_true', dest='verbose', help="Enable verbose logging.", default=False) + parser.add_option('-b', '--breakpoint', action='append', type='string', metavar='BPEXPR', dest='breakpoints', help='Breakpoint commands to create after the target has been created, the values will be sent to the "_regexp-break" command which supports breakpoints by name, file:line, and address.') + parser.add_option('-a', '--arch', type='string', dest='arch', help='The architecture to use when creating the debug target.', default=None) + parser.add_option('--platform', type='string', metavar='platform', dest='platform', help='Specify the platform to use when creating the debug target. Valid values include "localhost", "darwin-kernel", "ios-simulator", "remote-freebsd", "remote-macosx", "remote-ios", "remote-linux".', default=None) + parser.add_option('-l', '--launch-command', action='append', type='string', metavar='CMD', dest='launch_commands', help='LLDB command interpreter commands to run once after the process has launched. This option can be specified more than once.', default=[]) + parser.add_option('-s', '--stop-command', action='append', type='string', metavar='CMD', dest='stop_commands', help='LLDB command interpreter commands to run each time the process stops. This option can be specified more than once.', default=[]) + parser.add_option('-c', '--crash-command', action='append', type='string', metavar='CMD', dest='crash_commands', help='LLDB command interpreter commands to run in case the process crashes. This option can be specified more than once.', default=[]) + parser.add_option('-x', '--exit-command', action='append', type='string', metavar='CMD', dest='exit_commands', help='LLDB command interpreter commands to run once after the process has exited. This option can be specified more than once.', default=[]) + parser.add_option('-T', '--no-threads', action='store_false', dest='show_threads', help="Don't show threads when process stops.", default=True) + parser.add_option('--ignore-errors', action='store_false', dest='stop_on_error', help="Don't stop executing LLDB commands if the command returns an error. This applies to all of the LLDB command interpreter commands that get run for launch, stop, crash and exit.", default=True) + parser.add_option('-n', '--run-count', type='int', dest='run_count', metavar='N', help='How many times to run the process in case the process exits.', default=1) + parser.add_option('-t', '--event-timeout', type='int', dest='event_timeout', metavar='SEC', help='Specify the timeout in seconds to wait for process state change events.', default=lldb.UINT32_MAX) + parser.add_option('-e', '--environment', action='append', type='string', metavar='ENV', dest='env_vars', help='Environment variables to set in the inferior process when launching a process.') + parser.add_option('-d', '--working-dir', type='string', metavar='DIR', dest='working_dir', help='The the current working directory when launching a process.', default=None) + parser.add_option('-p', '--attach-pid', type='int', dest='attach_pid', metavar='PID', help='Specify a process to attach to by process ID.', default=-1) + parser.add_option('-P', '--attach-name', type='string', dest='attach_name', metavar='PROCESSNAME', help='Specify a process to attach to by name.', default=None) + parser.add_option('-w', '--attach-wait', action='store_true', dest='attach_wait', help='Wait for the next process to launch when attaching to a process by name.', default=False) + try: + (options, args) = parser.parse_args(argv) + except: + return + + attach_info = None + launch_info = None + exe = None + if args: + exe = args.pop(0) + launch_info = lldb.SBLaunchInfo (args) + if options.env_vars: + launch_info.SetEnvironmentEntries(options.env_vars, True) + if options.working_dir: + launch_info.SetWorkingDirectory(options.working_dir) + elif options.attach_pid != -1: + if options.run_count == 1: + attach_info = lldb.SBAttachInfo (options.attach_pid) + else: + print "error: --run-count can't be used with the --attach-pid option" + sys.exit(1) + elif not options.attach_name is None: + if options.run_count == 1: + attach_info = lldb.SBAttachInfo (options.attach_name, options.attach_wait) + else: + print "error: --run-count can't be used with the --attach-name option" + sys.exit(1) + else: + print 'error: a program path for a program to debug and its arguments are required' + sys.exit(1) + + + + # Create a new debugger instance + debugger = lldb.SBDebugger.Create() + debugger.SetAsync (True) + command_interpreter = debugger.GetCommandInterpreter() + # Create a target from a file and arch + + if exe: + print "Creating a target for '%s'" % exe + error = lldb.SBError() + target = debugger.CreateTarget (exe, options.arch, options.platform, True, error) + + if target: + + # Set any breakpoints that were specified in the args if we are launching. We use the + # command line command to take advantage of the shorthand breakpoint creation + if launch_info and options.breakpoints: + for bp in options.breakpoints: + debugger.HandleCommand( "_regexp-break %s" % (bp)) + run_commands(command_interpreter, ['breakpoint list']) + + for run_idx in range(options.run_count): + # Launch the process. Since we specified synchronous mode, we won't return + # from this function until we hit the breakpoint at main + error = lldb.SBError() + + if launch_info: + if options.run_count == 1: + print 'Launching "%s"...' % (exe) + else: + print 'Launching "%s"... (launch %u of %u)' % (exe, run_idx + 1, options.run_count) + + process = target.Launch (launch_info, error) + else: + if options.attach_pid != -1: + print 'Attaching to process %i...' % (options.attach_pid) + else: + if options.attach_wait: + print 'Waiting for next to process named "%s" to launch...' % (options.attach_name) + else: + print 'Attaching to existing process named "%s"...' % (options.attach_name) + process = target.Attach (attach_info, error) + + # Make sure the launch went ok + if process and process.GetProcessID() != lldb.LLDB_INVALID_PROCESS_ID: + + pid = process.GetProcessID() + print 'Process is %i' % (pid) + if attach_info: + # continue process if we attached as we won't get an initial event + process.Continue() + + listener = debugger.GetListener() + # sign up for process state change events + stop_idx = 0 + done = False + while not done: + event = lldb.SBEvent() + if listener.WaitForEvent (options.event_timeout, event): + if lldb.SBProcess.EventIsProcessEvent(event): + state = lldb.SBProcess.GetStateFromEvent (event) + if state == lldb.eStateInvalid: + # Not a state event + print 'process event = %s' % (event) + else: + print "process state changed event: %s" % (lldb.SBDebugger.StateAsCString(state)) + if state == lldb.eStateStopped: + if stop_idx == 0: + if launch_info: + print "process %u launched" % (pid) + run_commands(command_interpreter, ['breakpoint list']) + else: + print "attached to process %u" % (pid) + for m in target.modules: + print m + if options.breakpoints: + for bp in options.breakpoints: + debugger.HandleCommand( "_regexp-break %s" % (bp)) + run_commands(command_interpreter, ['breakpoint list']) + run_commands (command_interpreter, options.launch_commands) + else: + if options.verbose: + print "process %u stopped" % (pid) + run_commands (command_interpreter, options.stop_commands) + stop_idx += 1 + print_threads (process, options) + print "continuing process %u" % (pid) + process.Continue() + elif state == lldb.eStateExited: + exit_desc = process.GetExitDescription() + if exit_desc: + print "process %u exited with status %u: %s" % (pid, process.GetExitStatus (), exit_desc) + else: + print "process %u exited with status %u" % (pid, process.GetExitStatus ()) + run_commands (command_interpreter, options.exit_commands) + done = True + elif state == lldb.eStateCrashed: + print "process %u crashed" % (pid) + print_threads (process, options) + run_commands (command_interpreter, options.crash_commands) + done = True + elif state == lldb.eStateDetached: + print "process %u detached" % (pid) + done = True + elif state == lldb.eStateRunning: + # process is running, don't say anything, we will always get one of these after resuming + if options.verbose: + print "process %u resumed" % (pid) + elif state == lldb.eStateUnloaded: + print "process %u unloaded, this shouldn't happen" % (pid) + done = True + elif state == lldb.eStateConnected: + print "process connected" + elif state == lldb.eStateAttaching: + print "process attaching" + elif state == lldb.eStateLaunching: + print "process launching" + else: + print 'event = %s' % (event) + else: + # timeout waiting for an event + print "no process event for %u seconds, killing the process..." % (options.event_timeout) + done = True + # Now that we are done dump the stdout and stderr + process_stdout = process.GetSTDOUT(1024) + if process_stdout: + print "Process STDOUT:\n%s" % (process_stdout) + while process_stdout: + process_stdout = process.GetSTDOUT(1024) + print process_stdout + process_stderr = process.GetSTDERR(1024) + if process_stderr: + print "Process STDERR:\n%s" % (process_stderr) + while process_stderr: + process_stderr = process.GetSTDERR(1024) + print process_stderr + process.Kill() # kill the process + else: + if error: + print error + else: + if launch_info: + print 'error: launch failed' + else: + print 'error: attach failed' + + lldb.SBDebugger.Terminate() + +if __name__ == '__main__': + main(sys.argv[1:])
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