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| #!/usr/bin/python
from __future__ import print_function
import lldb
import optparse
import shlex
def stack_frames(debugger, command, result, dict):
command_args = shlex.split(command)
usage = "usage: %prog [options] <PATH> [PATH ...]"
description = '''This command will enumerate all stack frames, print the stack size for each, and print an aggregation of which functions have the largest stack frame sizes at the end.'''
parser = optparse.OptionParser(
description=description, prog='ls', usage=usage)
parser.add_option(
'-v',
'--verbose',
action='store_true',
dest='verbose',
help='display verbose debug info',
default=False)
try:
(options, args) = parser.parse_args(command_args)
except:
return
target = debugger.GetSelectedTarget()
process = target.GetProcess()
frame_info = {}
for thread in process:
last_frame = None
print("thread %u" % (thread.id))
for frame in thread.frames:
if last_frame:
frame_size = 0
if frame.idx == 1:
if frame.fp == last_frame.fp:
# No frame one the first frame (might be right at the
# entry point)
first_frame_size = 0
frame_size = frame.fp - frame.sp
else:
# First frame that has a valid size
first_frame_size = last_frame.fp - last_frame.sp
print("<%#7x> %s" % (first_frame_size, last_frame))
if first_frame_size:
name = last_frame.name
if name not in frame_info:
frame_info[name] = first_frame_size
else:
frame_info[name] += first_frame_size
else:
# Second or higher frame
frame_size = frame.fp - last_frame.fp
print("<%#7x> %s" % (frame_size, frame))
if frame_size > 0:
name = frame.name
if name not in frame_info:
frame_info[name] = frame_size
else:
frame_info[name] += frame_size
last_frame = frame
print(frame_info)
lldb.debugger.HandleCommand(
"command script add -f stacks.stack_frames stack_frames")
print("A new command called 'stack_frames' was added, type 'stack_frames --help' for more information.")
|