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authorTörök Edwin <edwintorok@gmail.com>2008-11-22 13:28:47 +0200
committerIngo Molnar <mingo@elte.hu>2008-11-23 09:25:15 +0100
commit02b67518e2b1c490787dac7f35e1204e74fe21ba (patch)
treea3d92846e1a09a829f300ab15726ee9c288cb49e /include/linux/stacktrace.h
parenta0a70c735ef714fe1b6777b571630c3d50c7b008 (diff)
downloadop-kernel-dev-02b67518e2b1c490787dac7f35e1204e74fe21ba.zip
op-kernel-dev-02b67518e2b1c490787dac7f35e1204e74fe21ba.tar.gz
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.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/stacktrace.h b/include/linux/stacktrace.h
index b106fd8..68de514 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
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