1#!/usr/bin/python 2# -*- coding: utf-8 -*- 3# 4# GDB debugging support, TCG status 5# 6# Copyright 2016 Linaro Ltd 7# 8# Authors: 9# Alex Bennée <alex.bennee@linaro.org> 10# 11# This work is licensed under the terms of the GNU GPL, version 2 or 12# later. See the COPYING file in the top-level directory. 13 14# 'qemu tcg-lock-status' -- display the TCG lock status across threads 15 16import gdb 17 18class TCGLockStatusCommand(gdb.Command): 19 '''Display TCG Execution Status''' 20 def __init__(self): 21 gdb.Command.__init__(self, 'qemu tcg-lock-status', gdb.COMMAND_DATA, 22 gdb.COMPLETE_NONE) 23 24 def invoke(self, arg, from_tty): 25 gdb.write("Thread, BQL (iothread_mutex), Replay, Blocked?\n") 26 for thread in gdb.inferiors()[0].threads(): 27 thread.switch() 28 29 iothread = gdb.parse_and_eval("iothread_locked") 30 replay = gdb.parse_and_eval("replay_locked") 31 32 frame = gdb.selected_frame() 33 if frame.name() == "__lll_lock_wait": 34 frame.older().select() 35 mutex = gdb.parse_and_eval("mutex") 36 owner = gdb.parse_and_eval("mutex->__data.__owner") 37 blocked = ("__lll_lock_wait waiting on %s from %d" % 38 (mutex, owner)) 39 else: 40 blocked = "not blocked" 41 42 gdb.write("%d/%d, %s, %s, %s\n" % (thread.num, thread.ptid[1], 43 iothread, replay, blocked)) 44