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Date: Mon, 24 Feb 2014 16:56:35 -0300
From: Arnaldo Carvalho de Melo <acme@...radead.org>
To: Ingo Molnar <mingo@...nel.org>
Cc: linux-kernel@...r.kernel.org, Jiri Olsa <jolsa@...hat.com>,
Corey Ashford <cjashfor@...ux.vnet.ibm.com>,
David Ahern <dsahern@...il.com>,
Frederic Weisbecker <fweisbec@...il.com>,
Jean Pihet <jean.pihet@...aro.org>,
Namhyung Kim <namhyung@...nel.org>,
Paul Mackerras <paulus@...ba.org>,
Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: [PATCH 07/12] perf tools: Add feature check for libdw dwarf unwind
From: Jiri Olsa <jolsa@...hat.com>
Adding feature check test code for libdw dwarf unwind.
Signed-off-by: Jiri Olsa <jolsa@...hat.com>
Cc: Corey Ashford <cjashfor@...ux.vnet.ibm.com>
Cc: David Ahern <dsahern@...il.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Ingo Molnar <mingo@...nel.org>
Cc: Jean Pihet <jean.pihet@...aro.org>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Link: http://lkml.kernel.org/r/1392825179-5228-4-git-send-email-jolsa@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
tools/perf/config/Makefile | 19 ++++++++++++-------
tools/perf/config/feature-checks/Makefile | 6 +++++-
tools/perf/config/feature-checks/test-all.c | 5 +++++
.../config/feature-checks/test-libdw-dwarf-unwind.c | 13 +++++++++++++
4 files changed, 35 insertions(+), 8 deletions(-)
create mode 100644 tools/perf/config/feature-checks/test-libdw-dwarf-unwind.c
diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile
index 9429805f395c..074fa618cc7b 100644
--- a/tools/perf/config/Makefile
+++ b/tools/perf/config/Makefile
@@ -59,6 +59,18 @@ ifeq ($(NO_PERF_REGS),0)
CFLAGS += -DHAVE_PERF_REGS_SUPPORT
endif
+ifndef NO_LIBELF
+ # for linking with debug library, run like:
+ # make DEBUG=1 LIBDW_DIR=/opt/libdw/
+ ifdef LIBDW_DIR
+ LIBDW_CFLAGS := -I$(LIBDW_DIR)/include
+ LIBDW_LDFLAGS := -L$(LIBDW_DIR)/lib
+
+ FEATURE_CHECK_CFLAGS-libdw-dwarf-unwind := $(LIBDW_CFLAGS)
+ FEATURE_CHECK_LDFLAGS-libdw-dwarf-unwind := $(LIBDW_LDFLAGS) -ldw
+ endif
+endif
+
# include ARCH specific config
-include $(src-perf)/arch/$(ARCH)/Makefile
@@ -267,13 +279,6 @@ else
msg := $(error No gnu/libc-version.h found, please install glibc-dev[el]/glibc-static);
endif
else
- # for linking with debug library, run like:
- # make DEBUG=1 LIBDW_DIR=/opt/libdw/
- ifdef LIBDW_DIR
- LIBDW_CFLAGS := -I$(LIBDW_DIR)/include
- LIBDW_LDFLAGS := -L$(LIBDW_DIR)/lib
- endif
-
ifneq ($(feature-dwarf), 1)
msg := $(warning No libdw.h found or old libdw.h found or elfutils is older than 0.138, disables dwarf support. Please install new elfutils-devel/libdw-dev);
NO_DWARF := 1
diff --git a/tools/perf/config/feature-checks/Makefile b/tools/perf/config/feature-checks/Makefile
index 12e551346fa6..2b492f5480e2 100644
--- a/tools/perf/config/feature-checks/Makefile
+++ b/tools/perf/config/feature-checks/Makefile
@@ -26,7 +26,8 @@ FILES= \
test-libunwind-debug-frame.bin \
test-on-exit.bin \
test-stackprotector-all.bin \
- test-timerfd.bin
+ test-timerfd.bin \
+ test-libdw-dwarf-unwind.bin
CC := $(CROSS_COMPILE)gcc -MD
PKG_CONFIG := $(CROSS_COMPILE)pkg-config
@@ -141,6 +142,9 @@ test-backtrace.bin:
test-timerfd.bin:
$(BUILD)
+test-libdw-dwarf-unwind.bin:
+ $(BUILD)
+
-include *.d
###############################
diff --git a/tools/perf/config/feature-checks/test-all.c b/tools/perf/config/feature-checks/test-all.c
index 9b8a544155bb..fc37eb3ca17b 100644
--- a/tools/perf/config/feature-checks/test-all.c
+++ b/tools/perf/config/feature-checks/test-all.c
@@ -89,6 +89,10 @@
# include "test-stackprotector-all.c"
#undef main
+#define main main_test_libdw_dwarf_unwind
+# include "test-libdw-dwarf-unwind.c"
+#undef main
+
int main(int argc, char *argv[])
{
main_test_libpython();
@@ -111,6 +115,7 @@ int main(int argc, char *argv[])
main_test_libnuma();
main_test_timerfd();
main_test_stackprotector_all();
+ main_test_libdw_dwarf_unwind();
return 0;
}
diff --git a/tools/perf/config/feature-checks/test-libdw-dwarf-unwind.c b/tools/perf/config/feature-checks/test-libdw-dwarf-unwind.c
new file mode 100644
index 000000000000..f676a3ff442a
--- /dev/null
+++ b/tools/perf/config/feature-checks/test-libdw-dwarf-unwind.c
@@ -0,0 +1,13 @@
+
+#include <elfutils/libdwfl.h>
+
+int main(void)
+{
+ /*
+ * This function is guarded via: __nonnull_attribute__ (1, 2).
+ * Passing '1' as arguments value. This code is never executed,
+ * only compiled.
+ */
+ dwfl_thread_getframes((void *) 1, (void *) 1, NULL);
+ return 0;
+}
--
1.8.1.4
--
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