1*f1cd52d8SAlex Bennée#!/usr/bin/python 2*f1cd52d8SAlex Bennée# -*- coding: utf-8 -*- 3*f1cd52d8SAlex Bennée# 4*f1cd52d8SAlex Bennée# GDB debugging support, TCG status 5*f1cd52d8SAlex Bennée# 6*f1cd52d8SAlex Bennée# Copyright 2016 Linaro Ltd 7*f1cd52d8SAlex Bennée# 8*f1cd52d8SAlex Bennée# Authors: 9*f1cd52d8SAlex Bennée# Alex Bennée <alex.bennee@linaro.org> 10*f1cd52d8SAlex Bennée# 11*f1cd52d8SAlex Bennée# This work is licensed under the terms of the GNU GPL, version 2. See 12*f1cd52d8SAlex Bennée# the COPYING file in the top-level directory. 13*f1cd52d8SAlex Bennée# 14*f1cd52d8SAlex Bennée# Contributions after 2012-01-13 are licensed under the terms of the 15*f1cd52d8SAlex Bennée# GNU GPL, version 2 or (at your option) any later version. 16*f1cd52d8SAlex Bennée 17*f1cd52d8SAlex Bennée# 'qemu tcg-lock-status' -- display the TCG lock status across threads 18*f1cd52d8SAlex Bennée 19*f1cd52d8SAlex Bennéeimport gdb 20*f1cd52d8SAlex Bennée 21*f1cd52d8SAlex Bennéeclass TCGLockStatusCommand(gdb.Command): 22*f1cd52d8SAlex Bennée '''Display TCG Execution Status''' 23*f1cd52d8SAlex Bennée def __init__(self): 24*f1cd52d8SAlex Bennée gdb.Command.__init__(self, 'qemu tcg-lock-status', gdb.COMMAND_DATA, 25*f1cd52d8SAlex Bennée gdb.COMPLETE_NONE) 26*f1cd52d8SAlex Bennée 27*f1cd52d8SAlex Bennée def invoke(self, arg, from_tty): 28*f1cd52d8SAlex Bennée gdb.write("Thread, BQL (iothread_mutex), Replay, Blocked?\n") 29*f1cd52d8SAlex Bennée for thread in gdb.inferiors()[0].threads(): 30*f1cd52d8SAlex Bennée thread.switch() 31*f1cd52d8SAlex Bennée 32*f1cd52d8SAlex Bennée iothread = gdb.parse_and_eval("iothread_locked") 33*f1cd52d8SAlex Bennée replay = gdb.parse_and_eval("replay_locked") 34*f1cd52d8SAlex Bennée 35*f1cd52d8SAlex Bennée frame = gdb.selected_frame() 36*f1cd52d8SAlex Bennée if frame.name() == "__lll_lock_wait": 37*f1cd52d8SAlex Bennée frame.older().select() 38*f1cd52d8SAlex Bennée mutex = gdb.parse_and_eval("mutex") 39*f1cd52d8SAlex Bennée owner = gdb.parse_and_eval("mutex->__data.__owner") 40*f1cd52d8SAlex Bennée blocked = ("__lll_lock_wait waiting on %s from %d" % 41*f1cd52d8SAlex Bennée (mutex, owner)) 42*f1cd52d8SAlex Bennée else: 43*f1cd52d8SAlex Bennée blocked = "not blocked" 44*f1cd52d8SAlex Bennée 45*f1cd52d8SAlex Bennée gdb.write("%d/%d, %s, %s, %s\n" % (thread.num, thread.ptid[1], 46*f1cd52d8SAlex Bennée iothread, replay, blocked)) 47