Commit-ID: 6a40cd90f5deb6dec322eeb54587ae55a934db2c
Gitweb: http://git.kernel.org/tip/6a40cd90f5deb6dec322eeb54587ae55a934db2c
Author: Jiri Olsa <jolsa@xxxxxxxxxx>
AuthorDate: Tue, 7 Aug 2012 15:20:44 +0200
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Fri, 10 Aug 2012 16:46:07 -0300
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@xxxxxxxxxx>
Original-patch-by: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: "Frank Ch. Eigler" <fche@xxxxxxxxxx>
Cc: Arun Sharma <asharma@xxxxxx>
Cc: Benjamin Redelings <benjamin.redelings@xxxxxxxxxxx>
Cc: Corey Ashford <cjashfor@xxxxxxxxxxxxxxxxxx>
Cc: Cyrill Gorcunov <gorcunov@xxxxxxxxxx>
Cc: Frank Ch. Eigler <fche@xxxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@xxxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: Robert Richter <robert.richter@xxxxxxx>
Cc: Stephane Eranian <eranian@xxxxxxxxxx>
Cc: Tom Zanussi <tzanussi@xxxxxxxxx>
Cc: Ulrich Drepper <drepper@xxxxxxxxx>
Link: http://lkml.kernel.org/r/1344345647-11536-10-git-send-email-jolsa@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
tools/perf/Makefile | 29 ++++++++++++++++++++++++++++-
tools/perf/config/feature-tests.mak | 25 +++++++++++++++++++++++++
2 files changed, 53 insertions(+), 1 deletions(-)
diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index 27ae84b..0aee6a9 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -43,6 +43,8 @@ include config/utilities.mak
#
# Define NO_LIBELF if you do not want libelf dependency (e.g. cross-builds)
#
+# Define NO_LIBUNWIND if you do not want libunwind dependency for dwarf
+# backtrace post unwind.
$(OUTPUT)PERF-VERSION-FILE: .FORCE-PERF-VERSION-FILE
@$(SHELL_PATH) util/PERF-VERSION-GEN $(OUTPUT)
@@ -64,6 +66,7 @@ AR = $(CROSS_COMPILE)ar
ifeq ($(ARCH),i386)
ARCH := x86
NO_PERF_REGS := 0
+ LIBUNWIND_LIBS = -lunwind -lunwind-x86
endif
ifeq ($(ARCH),x86_64)
ARCH := x86
@@ -77,6 +80,7 @@ ifeq ($(ARCH),x86_64)
ARCH_INCLUDE = ../../arch/x86/lib/memcpy_64.S ../../arch/x86/lib/memset_64.S
endif
NO_PERF_REGS := 0
+ LIBUNWIND_LIBS = -lunwind -lunwind-x86_64
endif
# Treat warnings as errors unless directed not to
@@ -97,7 +101,7 @@ ifdef PARSER_DEBUG
PARSER_DEBUG_CFLAGS := -DPARSER_DEBUG
endif
-CFLAGS = -fno-omit-frame-pointer -ggdb3 -Wall -Wextra -std=gnu99 $(CFLAGS_WERROR) $(CFLAGS_OPTIMIZE) $(EXTRA_WARNINGS) $(EXTRA_CFLAGS) $(PARSER_DEBUG_CFLAGS)
+CFLAGS = -fno-omit-frame-pointer -ggdb3 -funwind-tables -Wall -Wextra -std=gnu99 $(CFLAGS_WERROR) $(CFLAGS_OPTIMIZE) $(EXTRA_WARNINGS) $(EXTRA_CFLAGS) $(PARSER_DEBUG_CFLAGS)
EXTLIBS = -lpthread -lrt -lelf -lm
ALL_CFLAGS = $(CFLAGS) -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE
ALL_LDFLAGS = $(LDFLAGS)
@@ -476,6 +480,21 @@ ifneq ($(call try-cc,$(SOURCE_LIBELF),$(FLAGS_LIBELF)),y)
endif
endif # NO_LIBELF
+ifndef NO_LIBUNWIND
+# for linking with debug library, run like:
+# make DEBUG=1 LIBUNWIND_DIR=/opt/libunwind/
+ifdef LIBUNWIND_DIR
+ LIBUNWIND_CFLAGS := -I$(LIBUNWIND_DIR)/include
+ LIBUNWIND_LDFLAGS := -L$(LIBUNWIND_DIR)/lib
+endif
+
+FLAGS_UNWIND=$(LIBUNWIND_CFLAGS) $(ALL_CFLAGS) $(LIBUNWIND_LDFLAGS) $(ALL_LDFLAGS) $(EXTLIBS) $(LIBUNWIND_LIBS)
+ifneq ($(call try-cc,$(SOURCE_LIBUNWIND),$(FLAGS_UNWIND)),y)
+ msg := $(warning No libunwind found. Please install libunwind >= 0.99);
+ NO_LIBUNWIND := 1
+endif # Libunwind support
+endif # NO_LIBUNWIND
+
-include arch/$(ARCH)/Makefile
ifneq ($(OUTPUT),)
@@ -522,6 +541,14 @@ endif # PERF_HAVE_DWARF_REGS
endif # NO_DWARF
endif # NO_LIBELF
+ifdef NO_LIBUNWIND
+ BASIC_CFLAGS += -DNO_LIBUNWIND_SUPPORT
+else
+ EXTLIBS += $(LIBUNWIND_LIBS)
+ BASIC_CFLAGS := $(LIBUNWIND_CFLAGS) $(BASIC_CFLAGS)
+ BASIC_LDFLAGS := $(LIBUNWIND_LDFLAGS) $(BASIC_LDFLAGS)
+endif
+
ifdef NO_NEWT
BASIC_CFLAGS += -DNO_NEWT_SUPPORT
else
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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