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authorMasami Hiramatsu <masami.hiramatsu.pt@hitachi.com>2014-09-17 08:41:01 +0000
committerArnaldo Carvalho de Melo <acme@redhat.com>2014-09-17 18:01:43 -0300
commit664fee3dc37939bb8010906913fa9dbc52abb587 (patch)
tree72972d1684a1a4930039cfae22d0799aad8738f7 /tools/perf/util
parent2b394bc4468c2f5e6814a8dbb2a923c0448f8497 (diff)
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perf probe: Do not use dwfl_module_addrsym if dwarf_diename finds symbol name
Do not use dwfl_module_addrsym if dwarf_diename can find the symbol name, since dwfl_module_addrsym can be failed on shared libraries. Without this patch ---- $ perf probe -x ../lib/traceevent/libtraceevent.so -V create_arg_op Failed to find symbol at 0x11df1 Failed to find the address of create_arg_op Error: Failed to show vars. ---- With this patch ---- $ perf probe -x ../lib/traceevent/libtraceevent.so -V create_arg_op Available variables at create_arg_op @<create_arg_op+0> enum filter_op_type btype struct filter_arg* arg ---- This bug was reported on linux-perf-users@vger.kernel.org. Reported-by: david lerner <dlernerdroid@gmail.com> Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: david lerner <dlernerdroid@gmail.com> Cc: linux-perf-user@vger.kernel.org Cc: yrl.pp-manager.tt@hitachi.com Link: http://permalink.gmane.org/gmane.linux.kernel.perf.user/1691 Link: http://lkml.kernel.org/r/20140917084101.3722.25299.stgit@kbuild-f20.novalocal Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util')
-rw-r--r--tools/perf/util/probe-finder.c16
1 files changed, 10 insertions, 6 deletions
diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c
index 9c593561aa71..c7918f83b300 100644
--- a/tools/perf/util/probe-finder.c
+++ b/tools/perf/util/probe-finder.c
@@ -609,14 +609,18 @@ static int convert_to_trace_point(Dwarf_Die *sp_die, Dwfl_Module *mod,
return -EINVAL;
}
- /* Get an appropriate symbol from symtab */
- symbol = dwfl_module_addrsym(mod, paddr, &sym, NULL);
+ symbol = dwarf_diename(sp_die);
if (!symbol) {
- pr_warning("Failed to find symbol at 0x%lx\n",
- (unsigned long)paddr);
- return -ENOENT;
+ /* Try to get the symbol name from symtab */
+ symbol = dwfl_module_addrsym(mod, paddr, &sym, NULL);
+ if (!symbol) {
+ pr_warning("Failed to find symbol at 0x%lx\n",
+ (unsigned long)paddr);
+ return -ENOENT;
+ }
+ eaddr = sym.st_value;
}
- tp->offset = (unsigned long)(paddr - sym.st_value);
+ tp->offset = (unsigned long)(paddr - eaddr);
tp->address = (unsigned long)paddr;
tp->symbol = strdup(symbol);
if (!tp->symbol)