| # -*- coding: utf-8 -*- |
| # |
| # GDB debugging support, TCG status |
| # |
| # Copyright 2016 Linaro Ltd |
| # |
| # Authors: |
| # Alex Bennée <alex.bennee@linaro.org> |
| # |
| # This work is licensed under the terms of the GNU GPL, version 2 or |
| # later. See the COPYING file in the top-level directory. |
| |
| # 'qemu tcg-lock-status' -- display the TCG lock status across threads |
| |
| import gdb |
| |
| class TCGLockStatusCommand(gdb.Command): |
| '''Display TCG Execution Status''' |
| def __init__(self): |
| gdb.Command.__init__(self, 'qemu tcg-lock-status', gdb.COMMAND_DATA, |
| gdb.COMPLETE_NONE) |
| |
| def invoke(self, arg, from_tty): |
| gdb.write("Thread, BQL (iothread_mutex), Replay, Blocked?\n") |
| for thread in gdb.inferiors()[0].threads(): |
| thread.switch() |
| |
| iothread = gdb.parse_and_eval("iothread_locked") |
| replay = gdb.parse_and_eval("replay_locked") |
| |
| frame = gdb.selected_frame() |
| if frame.name() == "__lll_lock_wait": |
| frame.older().select() |
| mutex = gdb.parse_and_eval("mutex") |
| owner = gdb.parse_and_eval("mutex->__data.__owner") |
| blocked = ("__lll_lock_wait waiting on %s from %d" % |
| (mutex, owner)) |
| else: |
| blocked = "not blocked" |
| |
| gdb.write("%d/%d, %s, %s, %s\n" % (thread.num, thread.ptid[1], |
| iothread, replay, blocked)) |
