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1 | # -*- coding: utf-8 -*- |
2 | # | |
3 | # GDB debugging support, TCG status | |
4 | # | |
5 | # Copyright 2016 Linaro Ltd | |
6 | # | |
7 | # Authors: | |
8 | # Alex Bennée <alex.bennee@linaro.org> | |
9 | # | |
328eb60d PB |
10 | # This work is licensed under the terms of the GNU GPL, version 2 or |
11 | # later. See the COPYING file in the top-level directory. | |
f1cd52d8 AB |
12 | |
13 | # 'qemu tcg-lock-status' -- display the TCG lock status across threads | |
14 | ||
15 | import gdb | |
16 | ||
17 | class TCGLockStatusCommand(gdb.Command): | |
18 | '''Display TCG Execution Status''' | |
19 | def __init__(self): | |
20 | gdb.Command.__init__(self, 'qemu tcg-lock-status', gdb.COMMAND_DATA, | |
21 | gdb.COMPLETE_NONE) | |
22 | ||
23 | def invoke(self, arg, from_tty): | |
24 | gdb.write("Thread, BQL (iothread_mutex), Replay, Blocked?\n") | |
25 | for thread in gdb.inferiors()[0].threads(): | |
26 | thread.switch() | |
27 | ||
28 | iothread = gdb.parse_and_eval("iothread_locked") | |
29 | replay = gdb.parse_and_eval("replay_locked") | |
30 | ||
31 | frame = gdb.selected_frame() | |
32 | if frame.name() == "__lll_lock_wait": | |
33 | frame.older().select() | |
34 | mutex = gdb.parse_and_eval("mutex") | |
35 | owner = gdb.parse_and_eval("mutex->__data.__owner") | |
36 | blocked = ("__lll_lock_wait waiting on %s from %d" % | |
37 | (mutex, owner)) | |
38 | else: | |
39 | blocked = "not blocked" | |
40 | ||
41 | gdb.write("%d/%d, %s, %s, %s\n" % (thread.num, thread.ptid[1], | |
42 | iothread, replay, blocked)) |