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tracing: Update stack trace skipping for ORC unwinder

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With the addition of ORC unwinder and FRAME POINTER unwinder, the stack
trace skipping requirements have changed.

I went through the tracing stack trace dumps with ORC and with frame
pointers and recalculated the proper values.

Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt (VMware)
2018-01-23 13:25:04 -05:00
parent 6be7fa3c74
commit 2ee5b92a25
3 changed files with 70 additions and 32 deletions
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17
kernel/trace/trace_events_trigger.c
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@@ -1123,13 +1123,22 @@ static __init int register_trigger_snapshot_cmd(void) { return 0; }
#endif /* CONFIG_TRACER_SNAPSHOT */
#ifdef CONFIG_STACKTRACE
/*
* Skip 3:
* stacktrace_trigger()
#ifdef CONFIG_UNWINDER_ORC
/* Skip 2:
* event_triggers_post_call()
* trace_event_raw_event_xxx()
*/
#define STACK_SKIP 3
# define STACK_SKIP 2
#else
/*
* Skip 4:
* stacktrace_trigger()
* event_triggers_post_call()
* trace_event_buffer_commit()
* trace_event_raw_event_xxx()
*/
#define STACK_SKIP 4
#endif
static void
stacktrace_trigger(struct event_trigger_data *data, void *rec)