perf symbols: Add ability to iterate over a dso's symbols

Expose dso__first_symbol() and dso__next_symbol() to make it possible to
iterate over a dso's symbols.

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: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1405332185-4050-27-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

2 files changed, 19 insertions, 1 deletions

diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index 156ae36dfcfc..eb06746b06b2 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -342,6 +342,16 @@ static struct symbol *symbols__first(struct rb_root *symbols)
         return NULL;
 }
 
+static struct symbol *symbols__next(struct symbol *sym)
+{
+        struct rb_node *n = rb_next(&sym->rb_node);
+
+        if (n)
+                return rb_entry(n, struct symbol, rb_node);
+
+        return NULL;
+}
+
 struct symbol_name_rb_node {
         struct rb_node  rb_node;
         struct symbol   sym;
@@ -412,11 +422,16 @@ struct symbol *dso__find_symbol(struct dso *dso,
         return symbols__find(&dso->symbols[type], addr);
 }
 
-static struct symbol *dso__first_symbol(struct dso *dso, enum map_type type)
+struct symbol *dso__first_symbol(struct dso *dso, enum map_type type)
 {
         return symbols__first(&dso->symbols[type]);
 }
 
+struct symbol *dso__next_symbol(struct symbol *sym)
+{
+        return symbols__next(sym);
+}
+
 struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type,
                                         const char *name)
 {
diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
index 436169dd1d84..ee2d3ccd3ad1 100644
--- a/tools/perf/util/symbol.h
+++ b/tools/perf/util/symbol.h
@@ -240,6 +240,9 @@ struct symbol *dso__find_symbol(struct dso *dso, enum map_type type,
 struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type,
                                         const char *name);
 
+struct symbol *dso__first_symbol(struct dso *dso, enum map_type type);
+struct symbol *dso__next_symbol(struct symbol *sym);
+
 int filename__read_build_id(const char *filename, void *bf, size_t size);
 int sysfs__read_build_id(const char *filename, void *bf, size_t size);
 int modules__parse(const char *filename, void *arg,