Messages in this thread Patch in this message | | | From | Jiri Olsa <> | Subject | [PATCH 13/16] perf tools: Add feature check for libdw dwarf unwind | Date | Tue, 7 Jan 2014 13:47:30 +0100 |
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Adding feature check for libdw dwarf unwind.
Signed-off-by: Jiri Olsa <jolsa@redhat.com> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Cc: David Ahern <dsahern@gmail.com> Cc: Jean Pihet <jean.pihet@linaro.org> --- tools/perf/config/Makefile | 22 ++++++++++++++-------- tools/perf/config/feature-checks/Makefile | 6 +++++- tools/perf/config/feature-checks/test-all.c | 5 +++++ .../feature-checks/test-libdw-dwarf-unwind.c | 13 +++++++++++++ 4 files changed, 37 insertions(+), 9 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 1bc78d2..67de6f7 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 @@ -147,7 +159,8 @@ CORE_FEATURE_TESTS = \ libunwind \ on-exit \ stackprotector-all \ - timerfd + timerfd \ + libdw-dwarf-unwind # Set FEATURE_CHECK_(C|LD)FLAGS-all for all CORE_FEATURE_TESTS features. # If in the future we need per-feature checks/flags for features not @@ -281,13 +294,6 @@ 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 7cf6fcd..100a8bb 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 := $(CC) -MD @@ -140,6 +141,9 @@ 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 9b8a544..fc37eb3 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 0000000..f676a3f --- /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; +} -- 1.8.3.1
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