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Commit 45757895 authored by Jiri Olsa's avatar Jiri Olsa Committed by Arnaldo Carvalho de Melo
Browse files

perf tools: Add feature check for libdw dwarf unwind 



Adding feature check test code for libdw dwarf unwind.

Signed-off-by: default avatarJiri Olsa <jolsa@redhat.com>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jean Pihet <jean.pihet@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1392825179-5228-4-git-send-email-jolsa@redhat.com


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 7a0447d6

tools/perf/config/Makefile

+12 −7
Original line number Diff line number Diff line
@@ -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

tools/perf/config/feature-checks/Makefile

+5 −1
Original line number Diff line number Diff line
@@ -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



###############################

tools/perf/config/feature-checks/test-all.c

+5 −0
Original line number Diff line number Diff line
@@ -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;

}

tools/perf/config/feature-checks/test-libdw-dwarf-unwind.c

0 → 100644
+13 −0
Original line number Diff line number Diff line 


#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;

}