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.
Cc: Robert Richter <r...@kernel.org>
Signed-off-by: Josh Poimboeuf <jpoim...@redhat.com>
---
arch/x86/oprofile/backtrace.c | 13 ++++++++++---
1 file changed, 10 insertions(+), 3 deletions(-)
diff --git a/arch/x86/oprofile/backtrace.c b/arch/x86/oprofile/backtrace.c
index cb31a44..2ef6c8b 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;
}
--
2.7.4
