| Message ID | 20170517145259.28979-4-alex.bennee@linaro.org |
|---|---|
| State | New |
| Headers | show |
| Series | gdb updates and cputlb traces | expand |
On 05/17/2017 11:52 AM, Alex Bennée wrote: > This adds a simple helper to dump lock state within TCG. > > Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> > --- > 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 3e7adb87dc..91e928f6af 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, timers > +from qemugdb import aio, mtree, coroutine, timers, tcg > > class QemuCommand(gdb.Command): > '''Prefix for QEMU debug support commands''' > @@ -39,6 +39,7 @@ coroutine.CoroutineCommand() > mtree.MtreeCommand() > aio.HandlersCommand() > timers.TimersCommand() > +tcg.TCGLockStatusCommand() > > coroutine.CoroutineSPFunction() > coroutine.CoroutinePCFunction() > diff --git a/scripts/qemugdb/tcg.py b/scripts/qemugdb/tcg.py > new file mode 100644 > index 0000000000..8c7f1d7454 > --- /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 <alex.bennee@linaro.org> > +# > +# 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)) >
diff --git a/scripts/qemu-gdb.py b/scripts/qemu-gdb.py index 3e7adb87dc..91e928f6af 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, timers +from qemugdb import aio, mtree, coroutine, timers, tcg class QemuCommand(gdb.Command): '''Prefix for QEMU debug support commands''' @@ -39,6 +39,7 @@ coroutine.CoroutineCommand() mtree.MtreeCommand() aio.HandlersCommand() timers.TimersCommand() +tcg.TCGLockStatusCommand() coroutine.CoroutineSPFunction() coroutine.CoroutinePCFunction() diff --git a/scripts/qemugdb/tcg.py b/scripts/qemugdb/tcg.py new file mode 100644 index 0000000000..8c7f1d7454 --- /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 <alex.bennee@linaro.org> +# +# 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))
This adds a simple helper to dump lock state within TCG. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> --- scripts/qemu-gdb.py | 3 ++- scripts/qemugdb/tcg.py | 46 ++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 48 insertions(+), 1 deletion(-) create mode 100644 scripts/qemugdb/tcg.py -- 2.11.0