diff options
| author | Josh Poimboeuf <[email protected]> | 2016-08-24 11:50:15 -0500 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2016-09-08 08:58:40 +0200 |
| commit | 3e344a0db900757caaf0beeb749de4c7b59bfd60 (patch) | |
| tree | d53bf905033476c95200743d93c74532439f8a91 | |
| parent | 019e579d395733d14097c2d29c8c43226dad1617 (diff) | |
oprofile/x86: Add regs->ip to oprofile trace
dump_trace() doesn't add the interrupted instruction's address to the
trace, so add it manually. This makes the profile more useful, and also
makes it more consistent with what perf profiling does.
Signed-off-by: Josh Poimboeuf <[email protected]>
Acked-by: Robert Richter <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Brian Gerst <[email protected]>
Cc: Byungchul Park <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: Kees Cook <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Nilay Vaish <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Steven Rostedt <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Link: http://lkml.kernel.org/r/6c745a83dbd69fc6857ef9b2f8be0f011d775936.1472057064.git.jpoimboe@redhat.com
Signed-off-by: Ingo Molnar <[email protected]>
| -rw-r--r-- | arch/x86/oprofile/backtrace.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/arch/x86/oprofile/backtrace.c b/arch/x86/oprofile/backtrace.c index cb31a4440e58..2ef6c8b56311 100644 --- a/arch/x86/oprofile/backtrace.c +++ b/arch/x86/oprofile/backtrace.c @@ -114,9 +114,16 @@ x86_backtrace(struct pt_regs * const regs, unsigned int depth) if (!user_mode(regs)) { unsigned long stack = kernel_stack_pointer(regs); - if (depth) - dump_trace(NULL, regs, (unsigned long *)stack, 0, - &backtrace_ops, &depth); + + if (!depth) + return; + + oprofile_add_trace(regs->ip); + if (!--depth) + return; + + dump_trace(NULL, regs, (unsigned long *)stack, 0, + &backtrace_ops, &depth); return; } |