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| author | Irina Tirdea <irina.tirdea@intel.com> | 2012-09-08 02:43:23 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2012-09-08 03:12:30 +0200 |
| commit | c9f08bee50c71b06685ccff8110e56a7c05662b7 (patch) | |
| tree | 5a4fd1448bef4204e0dc0e99f8bf925a18fb6f61 | |
| parent | tools lib traceevent: replace mempcpy with memcpy (diff) | |
| download | linux-c9f08bee50c71b06685ccff8110e56a7c05662b7.tar.xz linux-c9f08bee50c71b06685ccff8110e56a7c05662b7.zip | |
perf tools: add NO_BACKTRACE for application self-debugging
perf has support for self-debugging by defining dump_stack function.
This function uses backtrace and backtrace_symbols functions defined as
GNU extensions.
In Android, bionic does not offer support for these functions and
compilation will fail with the following error:
target C: libperf <= tools/perf/util/util.c
tools/perf/util/util.c:4:22: fatal error: execinfo.h: No such file or directory
compilation terminated.
Add a compile-time option (NO_BACKTRACE) to enable or disable
self-debugging functionality in perf. This can also help in debugging
since it offers the possibility to turn on/off printing the backtrace.
Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/1347065004-15306-12-git-send-email-irina.tirdea@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| -rw-r--r-- | tools/perf/Makefile | 8 | ||||
| -rw-r--r-- | tools/perf/config/feature-tests.mak | 14 | ||||
| -rw-r--r-- | tools/perf/util/util.c | 6 |
3 files changed, 28 insertions, 0 deletions
diff --git a/tools/perf/Makefile b/tools/perf/Makefile index afd507574902..3eda49215730 100644 --- a/tools/perf/Makefile +++ b/tools/perf/Makefile @@ -755,6 +755,14 @@ else endif endif +ifdef NO_BACKTRACE + BASIC_CFLAGS += -DNO_BACKTRACE +else + ifneq ($(call try-cc,$(SOURCE_BACKTRACE),),y) + BASIC_CFLAGS += -DNO_BACKTRACE + endif +endif + ifdef ASCIIDOC8 export ASCIIDOC8 endif diff --git a/tools/perf/config/feature-tests.mak b/tools/perf/config/feature-tests.mak index 2f1156a62ab7..116690a669d2 100644 --- a/tools/perf/config/feature-tests.mak +++ b/tools/perf/config/feature-tests.mak @@ -179,3 +179,17 @@ int main(void) } endef endif + +ifndef NO_BACKTRACE +define SOURCE_BACKTRACE +#include <execinfo.h> +#include <stdio.h> + +int main(void) +{ + backtrace(NULL, 0); + backtrace_symbols(NULL, 0); + return 0; +} +endef +endif diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c index 1b8775c3707d..2055cf38041c 100644 --- a/tools/perf/util/util.c +++ b/tools/perf/util/util.c @@ -1,7 +1,9 @@ #include "../perf.h" #include "util.h" #include <sys/mman.h> +#ifndef NO_BACKTRACE #include <execinfo.h> +#endif #include <stdio.h> #include <stdlib.h> @@ -163,6 +165,7 @@ size_t hex_width(u64 v) } /* Obtain a backtrace and print it to stdout. */ +#ifndef NO_BACKTRACE void dump_stack(void) { void *array[16]; @@ -177,3 +180,6 @@ void dump_stack(void) free(strings); } +#else +void dump_stack(void) {} +#endif |