perf symbols: Make a separate function to parse /proc/modules

Make a separate function to parse /proc/modules so that it can be
reused.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1381221956-16699-2-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 58 insertions, 0 deletions

diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index 48c38791d61b..5fd95135e838 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -500,6 +500,64 @@ out_failure:
         return -1;
 }
 
+int modules__parse(const char *filename, void *arg,
+                   int (*process_module)(void *arg, const char *name,
+                                         u64 start))
+{
+        char *line = NULL;
+        size_t n;
+        FILE *file;
+        int err = 0;
+
+        file = fopen(filename, "r");
+        if (file == NULL)
+                return -1;
+
+        while (1) {
+                char name[PATH_MAX];
+                u64 start;
+                char *sep;
+                ssize_t line_len;
+
+                line_len = getline(&line, &n, file);
+                if (line_len < 0) {
+                        if (feof(file))
+                                break;
+                        err = -1;
+                        goto out;
+                }
+
+                if (!line) {
+                        err = -1;
+                        goto out;
+                }
+
+                line[--line_len] = '\0'; /* \n */
+
+                sep = strrchr(line, 'x');
+                if (sep == NULL)
+                        continue;
+
+                hex2u64(sep + 1, &start);
+
+                sep = strchr(line, ' ');
+                if (sep == NULL)
+                        continue;
+
+                *sep = '\0';
+
+                scnprintf(name, sizeof(name), "[%s]", line);
+
+                err = process_module(arg, name, start);
+                if (err)
+                        break;
+        }
+out:
+        free(line);
+        fclose(file);
+        return err;
+}
+
 struct process_kallsyms_args {
         struct map *map;
         struct dso *dso;