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authorJiri Olsa <jolsa@redhat.com>2012-08-07 15:20:44 +0200
committerArnaldo Carvalho de Melo <acme@redhat.com>2012-08-10 16:46:07 -0300
commit6a40cd90f5deb6dec322eeb54587ae55a934db2c (patch)
tree88e77297d85457427bb12c31d2e06d2eb8b237b1 /tools/perf/config
parent2bcd355b71dafa5793a680c5db043abe9f708418 (diff)
downloadop-kernel-dev-6a40cd90f5deb6dec322eeb54587ae55a934db2c.zip
op-kernel-dev-6a40cd90f5deb6dec322eeb54587ae55a934db2c.tar.gz
perf tools: Add libunwind dependency for DWARF CFI unwinding
Adding libunwind to be linked with perf if available. It's required for the to get dwarf cfi unwinding support. Also building perf with the dwarf call frame informations by default, so that we can unwind callchains in perf itself. Adding LIBUNWIND_DIR Makefile variable allowing user to specify the directory with libunwind to be linked. This is used for debug purposes. Signed-off-by: Jiri Olsa <jolsa@redhat.com> Original-patch-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: "Frank Ch. Eigler" <fche@redhat.com> Cc: Arun Sharma <asharma@fb.com> Cc: Benjamin Redelings <benjamin.redelings@nescent.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: Cyrill Gorcunov <gorcunov@openvz.org> Cc: Frank Ch. Eigler <fche@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Robert Richter <robert.richter@amd.com> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> Cc: Ulrich Drepper <drepper@gmail.com> Link: http://lkml.kernel.org/r/1344345647-11536-10-git-send-email-jolsa@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/config')
-rw-r--r--tools/perf/config/feature-tests.mak25
1 files changed, 25 insertions, 0 deletions
diff --git a/tools/perf/config/feature-tests.mak b/tools/perf/config/feature-tests.mak
index 6c18785..2f1156a 100644
--- a/tools/perf/config/feature-tests.mak
+++ b/tools/perf/config/feature-tests.mak
@@ -154,3 +154,28 @@ int main(void)
return 0;
}
endef
+
+ifndef NO_LIBUNWIND
+define SOURCE_LIBUNWIND
+#include <libunwind.h>
+#include <stdlib.h>
+
+extern int UNW_OBJ(dwarf_search_unwind_table) (unw_addr_space_t as,
+ unw_word_t ip,
+ unw_dyn_info_t *di,
+ unw_proc_info_t *pi,
+ int need_unwind_info, void *arg);
+
+
+#define dwarf_search_unwind_table UNW_OBJ(dwarf_search_unwind_table)
+
+int main(void)
+{
+ unw_addr_space_t addr_space;
+ addr_space = unw_create_addr_space(NULL, 0);
+ unw_init_remote(NULL, addr_space, NULL);
+ dwarf_search_unwind_table(addr_space, 0, NULL, NULL, 0, NULL);
+ return 0;
+}
+endef
+endif
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