Frederic Weisbecker 48d68b20d0 tracing/function-graph-tracer: support for x86-64 ... Impact: extend and enable the function graph tracer to 64-bit x86 This patch implements the support for function graph tracer under x86-64. Both static and dynamic tracing are supported. This causes some small CPP conditional asm on arch/x86/kernel/ftrace.c I wanted to use probe_kernel_read/write to make the return address saving/patching code more generic but it causes tracing recursion. That would be perhaps useful to implement a notrace version of these function for other archs ports. Note that arch/x86/process_64.c is not traced, as in X86-32. I first thought __switch_to() was responsible of crashes during tracing because I believed current task were changed inside but that's actually not the case (actually yes, but not the "current" pointer). So I will have to investigate to find the functions that harm here, to enable tracing of the other functions inside (but there is no issue at this time, while process_64.c stays out of -pg flags). A little possible race condition is fixed inside this patch too. When the tracer allocate a return stack dynamically, the current depth is not initialized before but after. An interrupt could occur at this time and, after seeing that the return stack is allocated, the tracer could try to trace it with a random uninitialized depth. It's a prevention, even if I hadn't problems with it. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Tim Bird <tim.bird@am.sony.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>		2008-12-02 09:47:48 +01:00
..
irq	irq: make variable static	2008-10-22 07:37:17 +02:00
power	tracing: allow tracing of suspend/resume & hibernation code again	2008-11-23 10:48:44 +01:00
time	nohz: disable tick_nohz_kick_tick() for now	2008-11-10 22:39:27 +01:00
trace	tracing/function-graph-tracer: support for x86-64	2008-12-02 09:47:48 +01:00
.gitignore
acct.c	tty: Fix abusers of current->sighand->tty	2008-10-13 09:51:42 -07:00
audit.c
audit.h
audit_tree.c	Fix inotify watch removal/umount races	2008-11-15 12:26:44 -08:00
auditfilter.c	Fix inotify watch removal/umount races	2008-11-15 12:26:44 -08:00
auditsc.c	tty: Fix abusers of current->sighand->tty	2008-10-13 09:51:42 -07:00
backtracetest.c
bounds.c
capability.c
cgroup.c	cgroups: fix a serious bug in cgroupstats	2008-11-19 18:50:00 -08:00
cgroup_debug.c	cgroups: fix probable race with put_css_set[_taskexit] and find_css_set	2008-10-20 08:52:38 -07:00
cgroup_freezer.c	freezer_cg: disable writing freezer.state of root cgroup	2008-11-12 17:17:16 -08:00
compat.c	Merge branches 'timers/clocksource', 'timers/hrtimers', 'timers/nohz', 'timers/ntp', 'timers/posixtimers' and 'timers/debug' into v28-timers-for-linus	2008-10-20 13:14:06 +02:00
configs.c	kernel/configs.c: remove useless comments	2008-10-20 08:52:34 -07:00
cpu.c	cpumask: introduce new API, without changing anything	2008-11-06 09:05:33 +01:00
cpuset.c	cpuset: update top cpuset's mems after adding a node	2008-11-19 18:49:58 -08:00
delayacct.c
dma-coherent.c
dma.c	kernel/dma.c: remove a CVS keyword	2008-10-16 11:21:30 -07:00
exec_domain.c	proc: move /proc/execdomains to kernel/exec_domain.c	2008-10-23 14:30:41 +04:00
exit.c	tracing/function-return-tracer: free the return stack on free_task()	2008-11-23 22:34:02 +01:00
extable.c
fork.c	tracing/function-return-tracer: change the name into function-graph-tracer	2008-11-26 01:59:45 +01:00
freezer.c	freezer_cg: use thaw_process() in unfreeze_cgroup()	2008-10-30 11:38:45 -07:00
futex.c	hrtimer: make the futex() system call use the per process slack value	2008-09-11 07:17:00 -07:00
futex_compat.c
hrtimer.c	hrtimer: clean up unused callback modes	2008-11-12 09:54:40 +01:00
itimer.c	timers: fix itimer/many thread hang	2008-09-14 16:25:35 +02:00
kallsyms.c	sprint_symbol(): use less stack	2008-11-19 18:49:58 -08:00
Kconfig.freezer	container freezer: implement freezer cgroup subsystem	2008-10-20 08:52:34 -07:00
Kconfig.hz
Kconfig.preempt
kexec.c	kexec: fix crash_save_vmcoreinfo_init build problem	2008-10-20 15:28:50 -07:00
kfifo.c
kgdb.c	kgdb: call touch_softlockup_watchdog on resume	2008-10-06 13:50:59 -05:00
kmod.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus	2008-10-16 12:38:34 -07:00
kprobes.c	kernel/kprobes.c: don't pad kretprobe_table_locks[] on uniprocessor builds	2008-11-12 17:17:17 -08:00
ksysfs.c	profiling: dynamically enable readprofile at runtime	2008-10-16 11:21:31 -07:00
kthread.c	tracepoints: add DECLARE_TRACE() and DEFINE_TRACE()	2008-11-16 09:01:36 +01:00
latencytop.c
lockdep.c	lockdep: fix irqs on/off ip tracing	2008-10-28 11:19:07 +01:00
lockdep_internals.h
lockdep_proc.c
Makefile	tracing/function-return-tracer: change the name into function-graph-tracer	2008-11-26 01:59:45 +01:00
marker.c	markers/tracpoints: fix non-modular build	2008-11-16 09:52:03 +01:00
module.c	Merge branches 'tracing/branch-tracer', 'tracing/ftrace', 'tracing/function-return-tracer', 'tracing/tracepoints' and 'tracing/urgent' into tracing/core	2008-11-17 09:36:22 +01:00
mutex-debug.c
mutex-debug.h
mutex.c
mutex.h
notifier.c	ftrace: ignore functions that cannot be kprobe-ed	2008-10-14 10:34:22 +02:00
ns_cgroup.c
nsproxy.c
panic.c	Make panic= and panic_on_oops into core_params	2008-10-22 10:00:25 +11:00
params.c	Fix compile warning in kernel/params.c	2008-10-23 12:09:00 -07:00
pid.c
pid_namespace.c
pm_qos_params.c
posix-cpu-timers.c	sched, signals: fix the racy usage of ->signal in account_group_xxx/run_posix_cpu_timers	2008-11-17 16:49:35 +01:00
posix-timers.c	Merge branch 'timers/range-hrtimers' into v28-range-hrtimers-for-linus-v2	2008-10-22 09:48:06 +02:00
printk.c	printk: remove unused code from kernel/printk.c	2008-10-23 21:54:29 +02:00
profile.c	profiling: clean up profile_nop()	2008-11-19 10:19:16 +01:00
ptrace.c	make ptrace_untrace() static	2008-10-20 08:52:39 -07:00
rcuclassic.c	rcu: RCU-based detection of stalled CPUs for Classic RCU, fix	2008-10-03 10:41:00 +02:00
rcupdate.c	rcupdate: fix bug of rcu_barrier*()	2008-10-21 15:59:53 +02:00
rcupreempt.c	byteorder: remove direct includes of linux/byteorder/swab[b].h	2008-10-20 08:52:40 -07:00
rcupreempt_trace.c
rcutorture.c	byteorder: remove direct includes of linux/byteorder/swab[b].h	2008-10-20 12:51:53 -07:00
relay.c	relay: fix cpu offline problem	2008-11-18 15:08:56 +01:00
res_counter.c
resource.c	reserve_region_with_split: Fix GFP_KERNEL usage under spinlock	2008-11-01 09:53:58 -07:00
rtmutex-debug.c
rtmutex-debug.h
rtmutex-tester.c
rtmutex.c
rtmutex.h
rtmutex_common.h
rwsem.c
sched.c	tracing/function-return-tracer: change the name into function-graph-tracer	2008-11-26 01:59:45 +01:00
sched_clock.c	sched_clock: prevent scd->clock from moving backwards	2008-10-10 11:17:04 +02:00
sched_cpupri.c
sched_cpupri.h
sched_debug.c	sched: fix kernel warning on /proc/sched_debug access	2008-11-16 08:07:15 +01:00
sched_fair.c	sched: release buddies on yield	2008-11-11 11:57:22 +01:00
sched_features.h	sched: backward looking buddy	2008-11-05 10:30:14 +01:00
sched_idletask.c	sched: add CONFIG_SMP consistency	2008-10-22 10:01:52 +02:00
sched_rt.c	Merge commit 'v2.6.28-rc1' into sched/urgent	2008-10-24 12:48:46 +02:00
sched_stats.h	sched, signals: fix the racy usage of ->signal in account_group_xxx/run_posix_cpu_timers	2008-11-17 16:49:35 +01:00
seccomp.c
semaphore.c
signal.c	tracepoints: add DECLARE_TRACE() and DEFINE_TRACE()	2008-11-16 09:01:36 +01:00
smp.c	generic-ipi: fix the smp_mb() placement	2008-11-06 08:41:56 +01:00
softirq.c	irq: call __irq_enter() before calling the tick_idle_check	2008-11-10 22:36:39 +01:00
softlockup.c	Make the taint flags reliable	2008-10-16 11:21:31 -07:00
spinlock.c
srcu.c
stacktrace.c
stop_machine.c	stop_machine: fix race with return value (fixes Bug #11989)	2008-11-16 15:09:52 -08:00
sys.c	Merge branch 'timers/range-hrtimers' into v28-range-hrtimers-for-linus-v2	2008-10-22 09:48:06 +02:00
sys_ni.c	reintroduce accept4	2008-11-19 18:49:57 -08:00
sysctl.c	ftrace: sysctl typo	2008-11-04 13:04:40 +01:00
sysctl_check.c
taskstats.c
test_kprobes.c
time.c
timeconst.pl
timer.c	Add round_jiffies_up and related routines	2008-11-06 08:42:48 +01:00
tracepoint.c	markers/tracpoints: fix non-modular build	2008-11-16 09:52:03 +01:00
tsacct.c
uid16.c
user.c
user_namespace.c
utsname.c
utsname_sysctl.c	sysctl: simplify ->strategy	2008-10-16 11:21:47 -07:00
wait.c	wait: kill is_sync_wait()	2008-10-16 11:21:31 -07:00
workqueue.c	cpumask: introduce new API, without changing anything	2008-11-06 09:05:33 +01:00