Commit de480999 authored Jan 16, 2015 by Namhyung Kim Committed by Arnaldo Carvalho de Melo Jan 21, 2015

perf symbols: Return the first entry with a given name in find_by_name method



When a dso contains multiple symbols which have same name, current
dso__find_symbol_by_name() only finds an one of them and there's no way
to get the all symbols without going through the rbtree.

So make symbols__find_by_name() return the first entry with the given
name and the next patch in this series will provide a way to iterate
from there, by the name ordered rb_tree, till a suitable symbol is
found.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Link: http://lkml.kernel.org/r/1421234288-22758-2-git-send-email-namhyung@kernel.org


[ Yanked this independent hunk, without changes, from a larger patch  ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

parent 0fb9f2aa

tools/perf/util/symbol.c

+17 −3

Original line number	Diff line number	Diff line
		@@ -396,6 +396,7 @@ static struct symbol symbols__find_by_name(struct rb_root symbols,
		const char *name)
		{
		struct rb_node *n;
		struct symbol_name_rb_node *s;

		if (symbols == NULL)
		return NULL;
		@@ -403,7 +404,6 @@ static struct symbol symbols__find_by_name(struct rb_root symbols,
		n = symbols->rb_node;

		while (n) {
		struct symbol_name_rb_node *s;
		int cmp;

		s = rb_entry(n, struct symbol_name_rb_node, rb_node);
		@@ -414,10 +414,24 @@ static struct symbol symbols__find_by_name(struct rb_root symbols,
		else if (cmp > 0)
		n = n->rb_right;
		else
		return &s->sym;
		break;
		}

		if (n == NULL)
		return NULL;

		/* return first symbol that has same name (if any) */
		for (n = rb_prev(n); n; n = rb_prev(n)) {
		struct symbol_name_rb_node *tmp;

		tmp = rb_entry(n, struct symbol_name_rb_node, rb_node);
		if (strcmp(tmp->sym.name, s->sym.name))
		break;

		s = tmp;
		}

		return &s->sym;
		}

		struct symbol dso__find_symbol(struct dso dso,