perf probe: Fix to ensure function declared file

Fix to ensure function declared file matches given file name. This fixes
a potential bug.

As I've commented on Lin Ming's fastpath enhancement, decl_file should
be checked on each probe point if user gives a probe point as func@file.

Cc: 2nddept-manager@sdl.hitachi.co.jp
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Lin Ming <ming.m.lin@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <20110330092541.2132.3584.stgit@ltc236.sdl.hitachi.co.jp>
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c
index 194f9e2a328575ed8fc9bf406bd3f82a667f6c0a..3bcd140b4545ab8ca063e6cd9b4579281863dbf7 100644 (file)
--- a/tools/perf/util/probe-finder.c
+++ b/tools/perf/util/probe-finder.c
@@ -1395,6 +1395,10 @@ static int probe_point_search_cb(Dwarf_Die *sp_die, void *data)
            !die_compare_name(sp_die, pp->function))
                return DWARF_CB_OK;
 
+       /* Check declared file */
+       if (pp->file && strtailcmp(pp->file, dwarf_decl_file(sp_die)))
+               return DWARF_CB_OK;
+
        pf->fname = dwarf_decl_file(sp_die);
        if (pp->line) { /* Function relative line */
                dwarf_decl_line(sp_die, &pf->lno);
@@ -1840,6 +1844,10 @@ static int line_range_search_cb(Dwarf_Die *sp_die, void *data)
        struct line_finder *lf = param->data;
        struct line_range *lr = lf->lr;
 
+       /* Check declared file */
+       if (lr->file && strtailcmp(lr->file, dwarf_decl_file(sp_die)))
+               return DWARF_CB_OK;
+
        if (dwarf_tag(sp_die) == DW_TAG_subprogram &&
            die_compare_name(sp_die, lr->function)) {
                lf->fname = dwarf_decl_file(sp_die);