perf tools: Fix old GCC build error in 'get_srcline'
trace-event-parse.c:parse_proc_kallsyms()
Old GCC (4.4.2) does not see through the code flow of get_srcline() and
gets confused about the status of 'file' and 'line':
CC /tmp/build/perf/util/srcline.o
cc1: warnings being treated as errors
util/srcline.c: In function ¿get_srcline¿:
util/srcline.c:226: error: ¿file¿ may be used uninitialized in this function
util/srcline.c:227: error: ¿line¿ may be used uninitialized in this function
make[1]: *** [/tmp/build/perf/util/srcline.o] Error 1
make: *** [install] Error 2
make: Leaving directory `/home/acme/git/linux/tools/perf'
[acme@fedora12 linux]$
Help out GCC by initializing 'file' and 'line'.
Signed-off-by: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Link: http://lkml.kernel.org/n/tip-h8k7h49z3cndqgjdftkmm9f8@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/util/srcline.c b/tools/perf/util/srcline.c
index 3735319..d11aefb 100644
--- a/tools/perf/util/srcline.c
+++ b/tools/perf/util/srcline.c
@@ -223,8 +223,8 @@
char *get_srcline(struct dso *dso, unsigned long addr)
{
- char *file;
- unsigned line;
+ char *file = NULL;
+ unsigned line = 0;
char *srcline;
char *dso_name = dso->long_name;
size_t size;
