xref: /qemu/scripts/qemugdb/tcg.py (revision 328eb60dc1a19448b36eb63901ca0b8f87ed6f57)
1f1cd52d8SAlex Bennée#!/usr/bin/python
2f1cd52d8SAlex Bennée# -*- coding: utf-8 -*-
3f1cd52d8SAlex Bennée#
4f1cd52d8SAlex Bennée# GDB debugging support, TCG status
5f1cd52d8SAlex Bennée#
6f1cd52d8SAlex Bennée# Copyright 2016 Linaro Ltd
7f1cd52d8SAlex Bennée#
8f1cd52d8SAlex Bennée# Authors:
9f1cd52d8SAlex Bennée#  Alex Bennée <alex.bennee@linaro.org>
10f1cd52d8SAlex Bennée#
11*328eb60dSPaolo Bonzini# This work is licensed under the terms of the GNU GPL, version 2 or
12*328eb60dSPaolo Bonzini# later.  See the COPYING file in the top-level directory.
13f1cd52d8SAlex Bennée
14f1cd52d8SAlex Bennée# 'qemu tcg-lock-status' -- display the TCG lock status across threads
15f1cd52d8SAlex Bennée
16f1cd52d8SAlex Bennéeimport gdb
17f1cd52d8SAlex Bennée
18f1cd52d8SAlex Bennéeclass TCGLockStatusCommand(gdb.Command):
19f1cd52d8SAlex Bennée    '''Display TCG Execution Status'''
20f1cd52d8SAlex Bennée    def __init__(self):
21f1cd52d8SAlex Bennée        gdb.Command.__init__(self, 'qemu tcg-lock-status', gdb.COMMAND_DATA,
22f1cd52d8SAlex Bennée                             gdb.COMPLETE_NONE)
23f1cd52d8SAlex Bennée
24f1cd52d8SAlex Bennée    def invoke(self, arg, from_tty):
25f1cd52d8SAlex Bennée        gdb.write("Thread, BQL (iothread_mutex), Replay, Blocked?\n")
26f1cd52d8SAlex Bennée        for thread in gdb.inferiors()[0].threads():
27f1cd52d8SAlex Bennée            thread.switch()
28f1cd52d8SAlex Bennée
29f1cd52d8SAlex Bennée            iothread = gdb.parse_and_eval("iothread_locked")
30f1cd52d8SAlex Bennée            replay = gdb.parse_and_eval("replay_locked")
31f1cd52d8SAlex Bennée
32f1cd52d8SAlex Bennée            frame = gdb.selected_frame()
33f1cd52d8SAlex Bennée            if frame.name() == "__lll_lock_wait":
34f1cd52d8SAlex Bennée                frame.older().select()
35f1cd52d8SAlex Bennée                mutex = gdb.parse_and_eval("mutex")
36f1cd52d8SAlex Bennée                owner = gdb.parse_and_eval("mutex->__data.__owner")
37f1cd52d8SAlex Bennée                blocked = ("__lll_lock_wait waiting on %s from %d" %
38f1cd52d8SAlex Bennée                           (mutex, owner))
39f1cd52d8SAlex Bennée            else:
40f1cd52d8SAlex Bennée                blocked = "not blocked"
41f1cd52d8SAlex Bennée
42f1cd52d8SAlex Bennée            gdb.write("%d/%d, %s, %s, %s\n" % (thread.num, thread.ptid[1],
43f1cd52d8SAlex Bennée                                               iothread, replay, blocked))
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