diff options
| author | Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> | 2014-09-17 10:41:01 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2014-09-17 23:01:43 +0200 |
| commit | 664fee3dc37939bb8010906913fa9dbc52abb587 (patch) | |
| tree | 72972d1684a1a4930039cfae22d0799aad8738f7 /tools | |
| parent | perf probe: Do not access kallsyms when analyzing user binaries (diff) | |
| download | linux-664fee3dc37939bb8010906913fa9dbc52abb587.tar.xz linux-664fee3dc37939bb8010906913fa9dbc52abb587.zip | |
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')
| -rw-r--r-- | tools/perf/util/probe-finder.c | 16 |
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) |