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Groups > linux.kernel > #1384139
| From | Andrey Ryabinin <aryabinin@virtuozzo.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH v2] kcov: don't profile branches in kcov |
| Date | 2016-04-21 14:20 +0200 |
| Message-ID | <rqlKp-zM-5@gated-at.bofh.it> (permalink) |
| References | <rqkbE-7J8-1@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
Profiling 'if' statements in __sanitizer_cov_trace_pc() leads to unbound recursion and crash: __sanitizer_cov_trace_pc() -> ftrace_likely_update -> __sanitizer_cov_trace_pc() ... Define DISABLE_BRANCH_PROFILING to disable this tracer. Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com> --- kernel/kcov.c | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/kcov.c b/kernel/kcov.c index 3efbee0..aee961f 100644 --- a/kernel/kcov.c +++ b/kernel/kcov.c @@ -1,5 +1,6 @@ #define pr_fmt(fmt) "kcov: " fmt +#define DISABLE_BRANCH_PROFILING #include <linux/compiler.h> #include <linux/types.h> #include <linux/file.h> -- 2.7.3
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Re: [PATCH] kcov: disable tracing and branch profiling in kcov Dmitry Vyukov <dvyukov@google.com> - 2016-04-21 12:40 +0200 [PATCH v2] kcov: don't profile branches in kcov Andrey Ryabinin <aryabinin@virtuozzo.com> - 2016-04-21 14:20 +0200
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