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authorIrina Tirdea <irina.tirdea@intel.com>2012-09-08 02:43:23 +0200
committerArnaldo Carvalho de Melo <acme@redhat.com>2012-09-08 03:12:30 +0200
commitc9f08bee50c71b06685ccff8110e56a7c05662b7 (patch)
tree5a4fd1448bef4204e0dc0e99f8bf925a18fb6f61 /tools
parenttools lib traceevent: replace mempcpy with memcpy (diff)
downloadlinux-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>
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/Makefile8
-rw-r--r--tools/perf/config/feature-tests.mak14
-rw-r--r--tools/perf/util/util.c6
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