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| author | Török Edwin <edwintorok@gmail.com> | 2008-11-22 13:28:47 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-11-23 09:25:15 +0100 |
| commit | 02b67518e2b1c490787dac7f35e1204e74fe21ba (patch) | |
| tree | a3d92846e1a09a829f300ab15726ee9c288cb49e /include/linux/stacktrace.h | |
| parent | a0a70c735ef714fe1b6777b571630c3d50c7b008 (diff) | |
| download | linux-stable-02b67518e2b1c490787dac7f35e1204e74fe21ba.tar.gz linux-stable-02b67518e2b1c490787dac7f35e1204e74fe21ba.tar.bz2 linux-stable-02b67518e2b1c490787dac7f35e1204e74fe21ba.zip | |
tracing: add support for userspace stacktraces in tracing/iter_ctrl
Impact: add new (default-off) tracing visualization feature
Usage example:
mount -t debugfs nodev /sys/kernel/debug
cd /sys/kernel/debug/tracing
echo userstacktrace >iter_ctrl
echo sched_switch >current_tracer
echo 1 >tracing_enabled
.... run application ...
echo 0 >tracing_enabled
Then read one of 'trace','latency_trace','trace_pipe'.
To get the best output you can compile your userspace programs with
frame pointers (at least glibc + the app you are tracing).
Signed-off-by: Török Edwin <edwintorok@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux/stacktrace.h')
| -rw-r--r-- | include/linux/stacktrace.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/stacktrace.h b/include/linux/stacktrace.h index b106fd8e0d5c..68de51468f5d 100644 --- a/include/linux/stacktrace.h +++ b/include/linux/stacktrace.h @@ -15,9 +15,17 @@ extern void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace); extern void print_stack_trace(struct stack_trace *trace, int spaces); + +#ifdef CONFIG_X86 +extern void save_stack_trace_user(struct stack_trace *trace); +#else +# define save_stack_trace_user(trace) do { } while (0) +#endif + #else # define save_stack_trace(trace) do { } while (0) # define save_stack_trace_tsk(tsk, trace) do { } while (0) +# define save_stack_trace_user(trace) do { } while (0) # define print_stack_trace(trace, spaces) do { } while (0) #endif |