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authorNamhyung Kim <namhyung.kim@lge.com>2012-10-02 01:32:51 +0900
committerArnaldo Carvalho de Melo <acme@redhat.com>2012-10-02 18:36:45 -0300
commit4e34d9588b46f44a4dba718606913133f15e4b21 (patch)
tree0b9d6f410d12a6695f20cef47f7ec1047a6e2958 /tools
parent4d8061faca7a50010f037374410f0c3647c3ecf8 (diff)
downloadlinux-linaro-stable-4e34d9588b46f44a4dba718606913133f15e4b21.tar.gz
perf tools: Convert to BACKTRACE_SUPPORT
For building perf without stack backtrace debug, we can set NO_BACKTRACE=1 as a argument of make. It then defines NO_BACKTRACE macro for C code to do the proper handling. However it usually used in a negative semantics - e.g. #ifndef - so we saw double negations which can be misleading. Convert it to a positive form to make it more readable and add _SUPPORT suffix for consistency. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Irina Tirdea <irina.tirdea@gmail.com> Cc: Irina Tirdea <irina.tirdea@intel.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1349109171-1942-1-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/Makefile10
-rw-r--r--tools/perf/util/util.c4
2 files changed, 7 insertions, 7 deletions
diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index 5216ade909d0..f9126f89efef 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -45,6 +45,8 @@ include config/utilities.mak
#
# Define NO_LIBUNWIND if you do not want libunwind dependency for dwarf
# backtrace post unwind.
+#
+# Define NO_BACKTRACE if you do not want stack backtrace debug feature
$(OUTPUT)PERF-VERSION-FILE: .FORCE-PERF-VERSION-FILE
@$(SHELL_PATH) util/PERF-VERSION-GEN $(OUTPUT)
@@ -749,11 +751,9 @@ ifndef NO_STRLCPY
endif
endif
-ifdef NO_BACKTRACE
- BASIC_CFLAGS += -DNO_BACKTRACE
-else
- ifneq ($(call try-cc,$(SOURCE_BACKTRACE),),y)
- BASIC_CFLAGS += -DNO_BACKTRACE
+ifndef NO_BACKTRACE
+ ifeq ($(call try-cc,$(SOURCE_BACKTRACE),),y)
+ BASIC_CFLAGS += -DBACKTRACE_SUPPORT
endif
endif
diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c
index 2055cf38041c..99664598bc1a 100644
--- a/tools/perf/util/util.c
+++ b/tools/perf/util/util.c
@@ -1,7 +1,7 @@
#include "../perf.h"
#include "util.h"
#include <sys/mman.h>
-#ifndef NO_BACKTRACE
+#ifdef BACKTRACE_SUPPORT
#include <execinfo.h>
#endif
#include <stdio.h>
@@ -165,7 +165,7 @@ size_t hex_width(u64 v)
}
/* Obtain a backtrace and print it to stdout. */
-#ifndef NO_BACKTRACE
+#ifdef BACKTRACE_SUPPORT
void dump_stack(void)
{
void *array[16];