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[Qemu-devel] [RFC PATCH 22/26] scripts/qemu-gdb: add simple tcg lock sta
From: |
Pavel Dovgalyuk |
Subject: |
[Qemu-devel] [RFC PATCH 22/26] scripts/qemu-gdb: add simple tcg lock status helper |
Date: |
Tue, 31 Oct 2017 14:08:40 +0300 |
User-agent: |
StGit/0.17.1-dirty |
From: Alex Bennée <address@hidden>
Add a simple helper to dump lock state.
Signed-off-by: Alex Bennée <address@hidden>
---
scripts/qemu-gdb.py | 3 ++-
scripts/qemugdb/tcg.py | 46 ++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 48 insertions(+), 1 deletion(-)
create mode 100644 scripts/qemugdb/tcg.py
diff --git a/scripts/qemu-gdb.py b/scripts/qemu-gdb.py
index b3f8e04..d58213e 100644
--- a/scripts/qemu-gdb.py
+++ b/scripts/qemu-gdb.py
@@ -26,7 +26,7 @@ import os, sys
sys.path.append(os.path.dirname(__file__))
-from qemugdb import aio, mtree, coroutine
+from qemugdb import aio, mtree, coroutine, tcg
class QemuCommand(gdb.Command):
'''Prefix for QEMU debug support commands'''
@@ -38,6 +38,7 @@ QemuCommand()
coroutine.CoroutineCommand()
mtree.MtreeCommand()
aio.HandlersCommand()
+tcg.TCGLockStatusCommand()
coroutine.CoroutineSPFunction()
coroutine.CoroutinePCFunction()
diff --git a/scripts/qemugdb/tcg.py b/scripts/qemugdb/tcg.py
new file mode 100644
index 0000000..8c7f1d7
--- /dev/null
+++ b/scripts/qemugdb/tcg.py
@@ -0,0 +1,46 @@
+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+#
+# GDB debugging support, TCG status
+#
+# Copyright 2016 Linaro Ltd
+#
+# Authors:
+# Alex Bennée <address@hidden>
+#
+# This work is licensed under the terms of the GNU GPL, version 2. See
+# the COPYING file in the top-level directory.
+#
+# Contributions after 2012-01-13 are licensed under the terms of the
+# GNU GPL, version 2 or (at your option) any later version.
+
+# '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))
- [Qemu-devel] [RFC PATCH 12/26] cpus: push BQL lock to qemu_*_wait_io_event, (continued)
- [Qemu-devel] [RFC PATCH 12/26] cpus: push BQL lock to qemu_*_wait_io_event, Pavel Dovgalyuk, 2017/10/31
- [Qemu-devel] [RFC PATCH 13/26] cpus: only take BQL for sleeping threads, Pavel Dovgalyuk, 2017/10/31
- [Qemu-devel] [RFC PATCH 14/26] replay/replay.c: bump REPLAY_VERSION again, Pavel Dovgalyuk, 2017/10/31
- [Qemu-devel] [RFC PATCH 15/26] replay/replay-internal.c: track holding of replay_lock, Pavel Dovgalyuk, 2017/10/31
- [Qemu-devel] [RFC PATCH 17/26] replay: push replay_mutex_lock up the call tree, Pavel Dovgalyuk, 2017/10/31
- [Qemu-devel] [RFC PATCH 16/26] replay: make locking visible outside replay code, Pavel Dovgalyuk, 2017/10/31
- [Qemu-devel] [RFC PATCH 18/26] cpu-exec: don't overwrite exception_index, Pavel Dovgalyuk, 2017/10/31
- [Qemu-devel] [RFC PATCH 19/26] cpu-exec: reset exit flag before calling cpu_exec_nocache, Pavel Dovgalyuk, 2017/10/31
- [Qemu-devel] [RFC PATCH 20/26] replay: don't destroy mutex at exit, Pavel Dovgalyuk, 2017/10/31
- [Qemu-devel] [RFC PATCH 21/26] replay: check return values of fwrite, Pavel Dovgalyuk, 2017/10/31
- [Qemu-devel] [RFC PATCH 22/26] scripts/qemu-gdb: add simple tcg lock status helper,
Pavel Dovgalyuk <=
- [Qemu-devel] [RFC PATCH 23/26] util/qemu-thread-*: add qemu_lock, locked and unlock trace events, Pavel Dovgalyuk, 2017/10/31
- [Qemu-devel] [RFC PATCH 24/26] scripts/analyse-locks-simpletrace.py: script to analyse lock times, Pavel Dovgalyuk, 2017/10/31
- [Qemu-devel] [RFC PATCH 26/26] scripts/qemu-gdb/timers.py: new helper to dump timer state, Pavel Dovgalyuk, 2017/10/31
- [Qemu-devel] [RFC PATCH 25/26] scripts/replay-dump.py: replay log dumper, Pavel Dovgalyuk, 2017/10/31
- Re: [Qemu-devel] [RFC PATCH 00/26] replay additions, no-reply, 2017/10/31
- [Qemu-devel] [RFC PATCH 00/26] replay additions, Pavel Dovgalyuk, 2017/10/31