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import lldb
import traceback
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)
var = frame
function_name = frame.GetFunctionName()
if function_name == "interp_exec_method_full":
try:
s = 'frame->imethod->method'
methoddesc = frame.EvaluateExpression('(char*) mono_method_full_name (' + s + ', 1)').summary[1:-1]
ipoffset = frame.EvaluateExpression('ip').GetValueAsUnsigned()
insn = ''
if ipoffset != 0:
ipoffset -= frame.EvaluateExpression('frame->imethod->code').GetValueAsUnsigned()
insn = "\"" + frame.EvaluateExpression('mono_interp_opname (*ip)').summary[1:-1] + "\""
var = '%s @ %d %s || %s' % (methoddesc, ipoffset, insn, frame)
except Exception as e:
traceback.print_exc()
elif function_name == "mono_interp_transform_method":
try:
s = 'runtime_method->method'
klassname = frame.EvaluateExpression('(char*) ' + s + '->klass->name').summary[1:-1]
methodname = frame.EvaluateExpression('(char*) ' + s + '->name').summary[1:-1]
var = 'transforming %s::%s || %s' % (klassname, methodname, frame)
except Exception as e:
print("DBG: transformfail:" + str(e))
elif 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(' %c %s' % ('*' 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')
debugger.HandleCommand('command alias mbt monobt')
print('"monobt" command installed')
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