mono/data/lldb/monobt.py

import lldb

def print_frames(thread, num_frames, current_thread):
    # TODO: Make output header similar to bt.
    print '%c thread #%i' % ('*' if current_thread else ' ', thread.idx)

    if current_thread:
        selected_frame = thread.GetSelectedFrame()

    for frame in thread.frames[:+num_frames]:
        pc = str(frame.addr)
        fmt = '  %c %s'
        var = frame
        if pc[0] == '0':
            try:
                framestr = frame.EvaluateExpression('(char*)mono_pmip((void*)%s)' % pc).summary[1:-1]
                var = 'frame #%i: %s%s' % (frame.idx, pc, framestr)
            except:
                pass

        print fmt % ('*' if current_thread and frame.idx == selected_frame.idx else ' ', var)

def monobt(debugger, command, result, dict):
    opts = {'all_bt': False, 'num_frames': None}

    if command == 'all':
        opts['all_bt'] = True
    elif command.isdigit():
        opts['num_frames'] = int(command)
    elif command != '':
        print 'error: monobt [<number>|all]'
        return

    target = debugger.GetSelectedTarget()
    process = target.process

    if not process.IsValid():
        print 'error: invalid process'
        return

    if opts['all_bt']:
        for thread in process.threads:
            print_frames(thread, len(thread), process.selected_thread == thread)
            print ''
    else:
        thread = process.selected_thread
        num_frames = len(thread) if opts['num_frames'] is None else opts['num_frames']
        print_frames(thread, num_frames, True)

    return None

def __lldb_init_module (debugger, dict):
    # This initializer is being run from LLDB in the embedded command interpreter
    # Add any commands contained in this module to LLDB
    debugger.HandleCommand('command script add -f monobt.monobt monobt')
    print '"monobt" command installed'