forked from OSchip/llvm-project
Added an example that show correct usage of the async process event API.
llvm-svn: 162967
This commit is contained in:
Greg Clayton
parent
9858b12381
commit
c769722a16
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#!/usr/bin/python
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#----------------------------------------------------------------------
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# Be sure to add the python path that points to the LLDB shared library.
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# On MacOSX csh, tcsh:
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# setenv PYTHONPATH /Applications/Xcode.app/Contents/SharedFrameworks/LLDB.framework/Resources/Python
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# On MacOSX sh, bash:
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# export PYTHONPATH=/Applications/Xcode.app/Contents/SharedFrameworks/LLDB.framework/Resources/Python
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#----------------------------------------------------------------------
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import lldb
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import optparse
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import os
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import sys
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def print_threads(process, options):
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if options.show_threads:
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for thread in process:
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print '%s %s' % (thread, thread.GetFrameAtIndex(0))
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def run_commands(command_interpreter, commands):
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return_obj = lldb.SBCommandReturnObject()
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for command in commands:
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command_interpreter.HandleCommand( command, return_obj )
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if return_obj.Succeeded():
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print return_obj.GetOutput()
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else:
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print return_obj
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if options.stop_on_error:
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break
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def main(argv):
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description='''Debugs a program using the LLDB python API and uses asynchronous broadcast events to watch for process state changes.'''
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parser = optparse.OptionParser(description=description, prog='process_events',usage='usage: process_events [options] program [arg1 arg2]')
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parser.add_option('-v', '--verbose', action='store_true', dest='verbose', help="Enable verbose logging.", default=False)
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parser.add_option('-b', '--breakpoint', action='append', type='string', dest='breakpoints', help='Breakpoint commands to create after the target has been created, the values will be sent to the "_regexp-break" command.')
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parser.add_option('-a', '--arch', type='string', dest='arch', help='The architecture to use when creating the debug target.', default=lldb.LLDB_ARCH_DEFAULT)
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parser.add_option('-s', '--stop-command', action='append', type='string', dest='stop_commands', help='Commands to run each time the process stops.', default=[])
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parser.add_option('-S', '--crash-command', action='append', type='string', dest='crash_commands', help='Commands to run in case the process crashes.', default=[])
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parser.add_option('-T', '--no-threads', action='store_false', dest='show_threads', help="Don't show threads when process stops.", default=True)
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parser.add_option('-e', '--no_stop-on-error', action='store_false', dest='stop_on_error', help="Stop executing stop or crash commands if the command returns an error.", default=True)
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parser.add_option('-c', '--run-count', type='int', dest='run_count', help='How many times to run the process in case the process exits.', default=1)
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parser.add_option('-t', '--event-timeout', type='int', dest='event_timeout', help='Specify the timeout in seconds to wait for process state change events.', default=5)
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try:
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(options, args) = parser.parse_args(argv)
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except:
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return
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if not args:
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print 'error: a program path for a program to debug and its arguments are required'
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sys.exit(1)
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exe = args.pop(0)
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# Create a new debugger instance
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debugger = lldb.SBDebugger.Create()
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command_interpreter = debugger.GetCommandInterpreter()
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return_obj = lldb.SBCommandReturnObject()
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# Create a target from a file and arch
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print "Creating a target for '%s'" % exe
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target = debugger.CreateTargetWithFileAndArch (exe, options.arch)
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if target:
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# Set any breakpoints that were specified in the args
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for bp in options.breakpoints:
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command_interpreter.HandleCommand( "_regexp-break %s" % (bp), return_obj )
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print return_obj
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for run_idx in range(options.run_count):
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# Launch the process. Since we specified synchronous mode, we won't return
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# from this function until we hit the breakpoint at main
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if options.run_count == 1:
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print 'Launching "%s"...' % (exe)
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else:
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print 'Launching "%s"... (launch %u of %u)' % (exe, run_idx + 1, options.run_count)
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process = target.LaunchSimple (args, None, os.getcwd())
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# Make sure the launch went ok
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if process:
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pid = process.GetProcessID()
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listener = lldb.SBListener("event_listener")
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# sign up for process state change events
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process.GetBroadcaster().AddListener(listener, lldb.SBProcess.eBroadcastBitStateChanged)
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stop_idx = 0
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done = False
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while not done:
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event = lldb.SBEvent()
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if listener.WaitForEvent (options.event_timeout, event):
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state = lldb.SBProcess.GetStateFromEvent (event)
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if state == lldb.eStateStopped:
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if stop_idx == 0:
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print "process %u launched" % (pid)
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else:
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if options.verbose:
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print "process %u stopped" % (pid)
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stop_idx += 1
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print_threads (process, options)
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run_commands (command_interpreter, options.stop_commands)
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process.Continue()
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elif state == lldb.eStateExited:
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exit_desc = process.GetExitDescription()
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if exit_desc:
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print "process %u exited with status %u: %s" % (pid, process.GetExitStatus (), exit_desc)
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else:
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print "process %u exited with status %u" % (pid, process.GetExitStatus ())
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done = True
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elif state == lldb.eStateCrashed:
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print "process %u crashed" % (pid)
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print_threads (process, options)
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run_commands (command_interpreter, options.crash_commands)
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done = True
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elif state == lldb.eStateDetached:
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print "process %u detached" % (pid)
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done = True
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elif state == lldb.eStateRunning:
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# process is running, don't say anything, we will always get one of these after resuming
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if options.verbose:
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print "process %u resumed" % (pid)
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elif state == lldb.eStateUnloaded:
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print "process %u unloaded, this shouldn't happen" % (pid)
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done = True
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elif state == lldb.eStateConnected:
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print "process connected"
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elif state == lldb.eStateAttaching:
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print "process attaching"
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elif state == lldb.eStateLaunching:
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print "process launching"
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else:
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# timeout waiting for an event
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print "no process event for %u seconds, killing the process..." % (options.event_timeout)
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done = True
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process.Kill() # kill the process
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lldb.SBDebugger.Terminate()
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if __name__ == '__main__':
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main(sys.argv[1:])
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