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perf tools: Check libunwind for availability of dwarf parsing feature 

The newly added dwarf unwinding feature [1] requires:
. a recent version (>= 1.1) of libunwind,
. libunwind to be configured with --enable-debug-frame.

[1] http://www.spinics.net/lists/kernel/msg1598951.html

Add the corresponding API tests in the feature check list.

Acked-by: Jiri Olsa <jolsa@redhat.com>
Signed-off-by: Jean Pihet <jean.pihet@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Jean Pihet 2013-09-26 12:36:37 +01:00 committed by Will Deacon
parent 7495f3742d
commit 405ffbd498
2 changed files with 25 additions and 2 deletions
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6
tools/perf/config/Makefile
View File

@ -226,9 +226,13 @@ endif
FLAGS_UNWIND=$(LIBUNWIND_CFLAGS) $(CFLAGS) $(LIBUNWIND_LDFLAGS) $(LDFLAGS) $(EXTLIBS) $(LIBUNWIND_LIBS)
ifneq ($(call try-cc,$(SOURCE_LIBUNWIND),$(FLAGS_UNWIND),libunwind),y)
msg := $(warning No libunwind found, disabling post unwind support. Please install libunwind-dev[el] >= 0.99);
msg := $(warning No libunwind found, disabling post unwind support. Please install libunwind-dev[el] >= 1.1);
NO_LIBUNWIND := 1
endif # Libunwind support
ifneq ($(call try-cc,$(SOURCE_LIBUNWIND_DEBUG_FRAME),$(FLAGS_UNWIND),libunwind debug_frame),y)
msg := $(warning No debug_frame support found in libunwind);
CFLAGS += -DNO_LIBUNWIND_DEBUG_FRAME
endif # debug_frame support in libunwind
endif # NO_LIBUNWIND
ifndef NO_LIBUNWIND

21
tools/perf/config/feature-tests.mak
View File

@ -185,7 +185,6 @@ extern int UNW_OBJ(dwarf_search_unwind_table) (unw_addr_space_t as,
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)
@ -197,6 +196,26 @@ int main(void)
return 0;
}
endef
define SOURCE_LIBUNWIND_DEBUG_FRAME
#include <libunwind.h>
#include <stdlib.h>
extern int
UNW_OBJ(dwarf_find_debug_frame) (int found, unw_dyn_info_t *di_debug,
unw_word_t ip, unw_word_t segbase,
const char *obj_name, unw_word_t start,
unw_word_t end);
#define dwarf_find_debug_frame UNW_OBJ(dwarf_find_debug_frame)
int main(void)
{
dwarf_find_debug_frame(0, NULL, 0, 0, NULL, 0, 0);
return 0;
}
endef
endif
ifndef NO_BACKTRACE