linux-kernel - [PATCHv3 01/29] perf tools: Remove stackprotector feature check

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Message-ID: <20131130164618.GA1228@krava.brq.redhat.com>
Date:	Sat, 30 Nov 2013 17:46:18 +0100
From:	Jiri Olsa <jolsa@...hat.com>
To:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Cc:	linux-kernel@...r.kernel.org,
	Corey Ashford <cjashfor@...ux.vnet.ibm.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...e.hu>,
	Namhyung Kim <namhyung@...nel.org>,
	Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Steven Rostedt <rostedt@...dmis.org>,
	David Ahern <dsahern@...il.com>
Subject: [PATCHv3 01/29] perf tools: Remove stackprotector feature check

On Fri, Nov 29, 2013 at 03:34:39PM -0300, Arnaldo Carvalho de Melo wrote:
> Em Thu, Nov 28, 2013 at 12:33:00PM +0100, Jiri Olsa escreveu:
> > We use -fstack-protector-all option to enable stack protecting
> > for all available functions. There's no reason for enabling
> > -Wstack-protector to get warning for unprotected functions.
> > 
> > Removing stackprotector feature check which was used to
> > enable the -Wstack-protector option.
> 
> Doesn't applies to my perf/core branch.

yep, that's that libunwind stuff messing up ;-)

attaching v3, I could resend whole rebased patchset if
needed.. I also updated my perf/core_plugins branch

thanks,
jirka


---
We use -fstack-protector-all option to enable stack protecting
for all available functions. There's no reason for enabling
-Wstack-protector to get warning for unprotected functions.

Removing stackprotector feature check which was used to
enable the -Wstack-protector option.

Signed-off-by: Jiri Olsa <jolsa@...hat.com>
Cc: Corey Ashford <cjashfor@...ux.vnet.ibm.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Ingo Molnar <mingo@...e.hu>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: David Ahern <dsahern@...il.com>
---
 tools/perf/config/Makefile                             | 5 -----
 tools/perf/config/feature-checks/Makefile              | 6 +-----
 tools/perf/config/feature-checks/test-stackprotector.c | 6 ------
 3 files changed, 1 insertion(+), 16 deletions(-)
 delete mode 100644 tools/perf/config/feature-checks/test-stackprotector.c

diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile
index 80ea6d8..38f388c2 100644
--- a/tools/perf/config/Makefile
+++ b/tools/perf/config/Makefile
@@ -161,7 +161,6 @@ CORE_FEATURE_TESTS =			\
 	libslang			\
 	libunwind			\
 	on-exit				\
-	stackprotector			\
 	stackprotector-all		\
 	timerfd
 
@@ -229,10 +228,6 @@ ifeq ($(feature-stackprotector-all), 1)
   CFLAGS += -fstack-protector-all
 endif
 
-ifeq ($(feature-stackprotector), 1)
-  CFLAGS += -Wstack-protector
-endif
-
 ifeq ($(DEBUG),0)
   ifeq ($(feature-fortify-source), 1)
     CFLAGS += -D_FORTIFY_SOURCE=2
diff --git a/tools/perf/config/feature-checks/Makefile b/tools/perf/config/feature-checks/Makefile
index 8dffb62..fc78699 100644
--- a/tools/perf/config/feature-checks/Makefile
+++ b/tools/perf/config/feature-checks/Makefile
@@ -26,7 +26,6 @@ FILES=					\
 	test-libunwind-debug-frame	\
 	test-on-exit			\
 	test-stackprotector-all		\
-	test-stackprotector		\
 	test-timerfd
 
 CC := $(CC) -MD
@@ -38,7 +37,7 @@ BUILD = $(CC) $(CFLAGS) $(LDFLAGS) -o $(OUTPUT)$@ $@.c
 ###############################
 
 test-all:
-	$(BUILD) -Werror -fstack-protector -fstack-protector-all -O2 -Werror -D_FORTIFY_SOURCE=2 -ldw -lelf -lnuma -lelf -laudit -I/usr/include/slang -lslang $(shell pkg-config --libs --cflags gtk+-2.0 2>/dev/null) $(FLAGS_PERL_EMBED) $(FLAGS_PYTHON_EMBED) -DPACKAGE='"perf"' -lbfd -ldl
+	$(BUILD) -Werror -fstack-protector-all -O2 -Werror -D_FORTIFY_SOURCE=2 -ldw -lelf -lnuma -lelf -laudit -I/usr/include/slang -lslang $(shell pkg-config --libs --cflags gtk+-2.0 2>/dev/null) $(FLAGS_PERL_EMBED) $(FLAGS_PYTHON_EMBED) -DPACKAGE='"perf"' -lbfd -ldl
 
 test-hello:
 	$(BUILD)
@@ -46,9 +45,6 @@ test-hello:
 test-stackprotector-all:
 	$(BUILD) -Werror -fstack-protector-all
 
-test-stackprotector:
-	$(BUILD) -Werror -fstack-protector -Wstack-protector
-
 test-fortify-source:
 	$(BUILD) -O2 -Werror -D_FORTIFY_SOURCE=2
 
diff --git a/tools/perf/config/feature-checks/test-stackprotector.c b/tools/perf/config/feature-checks/test-stackprotector.c
deleted file mode 100644
index c9f398d..0000000
--- a/tools/perf/config/feature-checks/test-stackprotector.c
+++ /dev/null
@@ -1,6 +0,0 @@
-#include <stdio.h>
-
-int main(void)
-{
-	return puts("hi");
-}
-- 
1.8.3.1

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