data/lldb/monobt.py

   1 import lldb
   2 import traceback
   3
   4 def print_frames(thread, num_frames, current_thread):
   5     # TODO: Make output header similar to bt.
   6     print('%c thread #%i' % ('*' if current_thread else ' ', thread.idx))
   7
   8     if current_thread:
   9         selected_frame = thread.GetSelectedFrame()
  10
  11     for frame in thread.frames[:+num_frames]:
  12         pc = str(frame.addr)
  13         var = frame
  14         function_name = frame.GetFunctionName()
  15         if function_name == "interp_exec_method_full":
  16             try:
  17                 s = 'frame->imethod->method'
  18                 methoddesc = frame.EvaluateExpression('(char*) mono_method_full_name (' + s + ', 1)').summary[1:-1]
  19
  20                 ipoffset = frame.EvaluateExpression('ip').GetValueAsUnsigned()
  21                 insn = ''
  22                 if ipoffset != 0:
  23                     ipoffset -= frame.EvaluateExpression('frame->imethod->code').GetValueAsUnsigned()
  24                     insn = "\"" + frame.EvaluateExpression('mono_interp_opname (*ip)').summary[1:-1] + "\""
  25                 var = '%s @ %d %s || %s' % (methoddesc, ipoffset, insn, frame)
  26             except Exception as e:
  27                 traceback.print_exc()
  28         elif function_name == "mono_interp_transform_method":
  29             try:
  30                 s = 'runtime_method->method'
  31                 klassname = frame.EvaluateExpression('(char*) ' + s + '->klass->name').summary[1:-1]
  32                 methodname = frame.EvaluateExpression('(char*) ' + s + '->name').summary[1:-1]
  33                 var = 'transforming %s::%s || %s' % (klassname, methodname, frame)
  34             except Exception as e:
  35                 print("DBG: transformfail:" + str(e))
  36         elif pc[0] == '0':
  37             try:
  38                 framestr = frame.EvaluateExpression('(char*)mono_pmip((void*)%s)' % pc).summary[1:-1]
  39                 var = 'frame #%i: %s%s' % (frame.idx, pc, framestr)
  40             except:
  41                 pass
  42
  43         print('  %c %s' % ('*' if current_thread and frame.idx == selected_frame.idx else ' ', var))
  44
  45 def monobt(debugger, command, result, dict):
  46     opts = {'all_bt': False, 'num_frames': None}
  47
  48     if command == 'all':
  49         opts['all_bt'] = True
  50     elif command.isdigit():
  51         opts['num_frames'] = int(command)
  52     elif command != '':
  53         print('error: monobt [<number>|all]')
  54         return
  55
  56     target = debugger.GetSelectedTarget()
  57     process = target.process
  58
  59     if not process.IsValid():
  60         print('error: invalid process')
  61         return
  62
  63     if opts['all_bt']:
  64         for thread in process.threads:
  65             print_frames(thread, len(thread), process.selected_thread == thread)
  66             print('')
  67     else:
  68         thread = process.selected_thread
  69         num_frames = len(thread) if opts['num_frames'] is None else opts['num_frames']
  70         print_frames(thread, num_frames, True)
  71
  72     return None
  73
  74 def __lldb_init_module (debugger, dict):
  75     # This initializer is being run from LLDB in the embedded command interpreter
  76     # Add any commands contained in this module to LLDB
  77     debugger.HandleCommand('command script add -f monobt.monobt monobt')
  78     debugger.HandleCommand('command alias mbt monobt')
  79     print('"monobt" command installed')