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authorFrederic Weisbecker <fweisbec@gmail.com>2009-12-17 05:40:33 +0100
committerIngo Molnar <mingo@elte.hu>2009-12-17 09:56:19 +0100
commit61c1917f47f73c968e92d04d15370b1dc3ec4592 (patch)
treea20445bcaf484d270bd6cb8de5969702110af687 /arch/x86/oprofile
parent5b74ed4729ad2b2017453add68104a83206caefb (diff)
perf events, x86/stacktrace: Make stack walking optional
The current print_context_stack helper that does the stack walking job is good for usual stacktraces as it walks through all the stack and reports even addresses that look unreliable, which is nice when we don't have frame pointers for example. But we have users like perf that only require reliable stacktraces, and those may want a more adapted stack walker, so lets make this function a callback in stacktrace_ops that users can tune for their needs. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <1261024834-5336-1-git-send-regression-fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/oprofile')
-rw-r--r--arch/x86/oprofile/backtrace.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/arch/x86/oprofile/backtrace.c b/arch/x86/oprofile/backtrace.c
index 044897be021..3855096c59b 100644
--- a/arch/x86/oprofile/backtrace.c
+++ b/arch/x86/oprofile/backtrace.c
@@ -41,10 +41,11 @@ static void backtrace_address(void *data, unsigned long addr, int reliable)
}
static struct stacktrace_ops backtrace_ops = {
- .warning = backtrace_warning,
- .warning_symbol = backtrace_warning_symbol,
- .stack = backtrace_stack,
- .address = backtrace_address,
+ .warning = backtrace_warning,
+ .warning_symbol = backtrace_warning_symbol,
+ .stack = backtrace_stack,
+ .address = backtrace_address,
+ .walk_stack = print_context_stack,
};
struct frame_head {