perf tools: Fix fallback to cplus_demangle() when bfd_demangle() is not available

In old binutils we can't access bfd_demangle(), use
cplus_demangle() just like oprofile.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Luis Claudio R. Gonçalves <lclaudio@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
LKML-Reference: <20090811192211.GG18061@ghostprotocols.net>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

3 files changed, 42 insertions, 26 deletions

diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index 60411e94113b..c045b4271e57 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -382,22 +382,29 @@ endif
 ifdef NO_DEMANGLE
         BASIC_CFLAGS += -DNO_DEMANGLE
 else
-
         has_bfd := $(shell sh -c "(echo '\#include <bfd.h>'; echo 'int main(void) { bfd_demangle(0, 0, 0); return 0; }') | $(CC) -x c - $(ALL_CFLAGS) -o /dev/null $(ALL_LDFLAGS) -lbfd > /dev/null 2>&1 && echo y")
 
-        has_bfd_iberty := $(shell sh -c "(echo '\#include <bfd.h>'; echo 'int main(void) { bfd_demangle(0, 0, 0); return 0; }') | $(CC) -x c - $(ALL_CFLAGS) -o /dev/null $(ALL_LDFLAGS) -lbfd -liberty > /dev/null 2>&1 && echo y")
-
-        has_bfd_iberty_z := $(shell sh -c "(echo '\#include <bfd.h>'; echo 'int main(void) { bfd_demangle(0, 0, 0); return 0; }') | $(CC) -x c - $(ALL_CFLAGS) -o /dev/null $(ALL_LDFLAGS) -lbfd -liberty -lz > /dev/null 2>&1 && echo y")
-
         ifeq ($(has_bfd),y)
                 EXTLIBS += -lbfd
-        else ifeq ($(has_bfd_iberty),y)
-                EXTLIBS += -lbfd -liberty
-        else ifeq ($(has_bfd_iberty_z),y)
-                EXTLIBS += -lbfd -liberty -lz
         else
-                msg := $(warning No bfd.h/libbfd found, install binutils-dev[el] to gain symbol demangling)
-                BASIC_CFLAGS += -DNO_DEMANGLE
+                has_bfd_iberty := $(shell sh -c "(echo '\#include <bfd.h>'; echo 'int main(void) { bfd_demangle(0, 0, 0); return 0; }') | $(CC) -x c - $(ALL_CFLAGS) -o /dev/null $(ALL_LDFLAGS) -lbfd -liberty > /dev/null 2>&1 && echo y")
+                ifeq ($(has_bfd_iberty),y)
+                        EXTLIBS += -lbfd -liberty
+                else
+                        has_bfd_iberty_z := $(shell sh -c "(echo '\#include <bfd.h>'; echo 'int main(void) { bfd_demangle(0, 0, 0); return 0; }') | $(CC) -x c - $(ALL_CFLAGS) -o /dev/null $(ALL_LDFLAGS) -lbfd -liberty -lz > /dev/null 2>&1 && echo y")
+                        ifeq ($(has_bfd_iberty_z),y)
+                                EXTLIBS += -lbfd -liberty -lz
+                        else
+                                has_cplus_demangle := $(shell sh -c "(echo 'extern char *cplus_demangle(const char *, int);'; echo 'int main(void) { cplus_demangle(0, 0); return 0; }') | $(CC) -x c - $(ALL_CFLAGS) -o /dev/null $(ALL_LDFLAGS) -liberty > /dev/null 2>&1 && echo y")
+                                ifeq ($(has_cplus_demangle),y)
+                                        EXTLIBS += -liberty
+                                        BASIC_CFLAGS += -DHAVE_CPLUS_DEMANGLE
+                                else
+                                        msg := $(warning No bfd.h/libbfd found, install binutils-dev[el] to gain symbol demangling)
+                                        BASIC_CFLAGS += -DNO_DEMANGLE
+                                endif
+                        endif
+                endif
         endif
 endif
 
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index f1dcede14307..2473fd427beb 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -7,23 +7,8 @@
 #include <gelf.h>
 #include <elf.h>
 
-#ifndef NO_DEMANGLE
-#include <bfd.h>
-#else
-static inline
-char *bfd_demangle(void __used *v, const char __used *c, int __used i)
-{
-        return NULL;
-}
-#endif
-
 const char *sym_hist_filter;
 
-#ifndef DMGL_PARAMS
-#define DMGL_PARAMS      (1 << 0)       /* Include function args */
-#define DMGL_ANSI        (1 << 1)       /* Include const, volatile, etc */
-#endif
-
 enum dso_origin {
         DSO__ORIG_KERNEL = 0,
         DSO__ORIG_JAVA_JIT,
diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
index 1e003ec2f4b1..b53bf0125c1b 100644
--- a/tools/perf/util/symbol.h
+++ b/tools/perf/util/symbol.h
@@ -7,6 +7,30 @@
 #include <linux/rbtree.h>
 #include "module.h"
 
+#ifdef HAVE_CPLUS_DEMANGLE
+extern char *cplus_demangle(const char *, int);
+
+static inline char *bfd_demangle(void __used *v, const char *c, int i)
+{
+        return cplus_demangle(c, i);
+}
+#else
+#ifdef NO_DEMANGLE
+static inline char *bfd_demangle(void __used *v, const char __used *c,
+                                 int __used i)
+{
+        return NULL;
+}
+#else
+#include <bfd.h>
+#endif
+#endif
+
+#ifndef DMGL_PARAMS
+#define DMGL_PARAMS      (1 << 0)       /* Include function args */
+#define DMGL_ANSI        (1 << 1)       /* Include const, volatile, etc */
+#endif
+
 struct symbol {
         struct rb_node  rb_node;
         u64             start;