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SubjectRe: perf: commit 44f24cb3156a1e (Factor DSO symtab types) causes segfaults
On Wed, Aug 01, 2012 at 01:57:40PM +0200, Markus Trippelsdorf wrote:
> On 2012.07.31 at 16:14 +0200, Ingo Molnar wrote:
> > Jiri Olsa (4):
> > perf symbols: Factor DSO symtab types to generic binary types
>
> The commit above causes perf segfaults on my machine (running glibc trunk):
>
> (gdb) run top --stdio
> Starting program: /usr/src/linux/tools/perf/perf top --stdio
> warning: no loadable sections found in added symbol-file system-supplied DSO at 0x7ffff7ffa000
> [Thread debugging using libthread_db enabled]
> Using host libthread_db library "/lib/libthread_db.so.1".
>
> Program received signal SIGSEGV, Segmentation fault.
> dso__load (dso=0x6661d0, map=map@entry=0x666170, filter=filter@entry=0x426840 <symbol_filter>) at util/symbol.c:1833
> 1833 dso->symtab_type = binary_type_symtab[i];
> (gdb) bt
> #0 dso__load (dso=0x6661d0, map=map@entry=0x666170, filter=filter@entry=0x426840 <symbol_filter>) at util/symbol.c:1833
> #1 0x000000000045fe87 in map__load (self=self@entry=0x666170, filter=filter@entry=0x426840 <symbol_filter>) at util/map.c:124
> #2 0x000000000045ffbd in map__find_symbol (self=0x666170, addr=11008, filter=filter@entry=0x426840 <symbol_filter>) at util/map.c:168
> #3 0x000000000043b5df in perf_event__preprocess_sample (event=event@entry=0x7ffff44c8720, machine=machine@entry=0x647730,
> al=al@entry=0x7fffffffb030, sample=sample@entry=0x7fffffffb060, filter=filter@entry=0x426840 <symbol_filter>) at util/event.c:886
> #4 0x0000000000426d8e in perf_event__process_sample (machine=0x647730, sample=0x7fffffffb060, evsel=<optimized out>, event=0x7ffff44c8720,
> tool=0x7fffffffb2c0) at builtin-top.c:723
> #5 perf_top__mmap_read_idx (top=top@entry=0x7fffffffb2c0, idx=idx@entry=3) at builtin-top.c:858
> #6 0x00000000004291c3 in perf_top__mmap_read (top=<optimized out>) at builtin-top.c:873
> #7 __cmd_top (top=0x7fffffffb2c0) at builtin-top.c:1040
> #8 cmd_top (argc=<optimized out>, argv=<optimized out>, prefix=<optimized out>) at builtin-top.c:1348
> #9 0x0000000000414d03 in run_builtin (p=p@entry=0x4dc888, argc=argc@entry=2, argv=argv@entry=0x7fffffffe0b0) at perf.c:273
> #10 0x0000000000415487 in handle_internal_command (argv=0x7fffffffe0b0, argc=2) at perf.c:345
> #11 run_argv (argv=0x7fffffffdeb0, argcp=0x7fffffffdebc) at perf.c:389
> #12 main (argc=2, argv=0x7fffffffe0b0) at perf.c:487
> (gdb)
hi,
I cannot reproduce, but found one obvious bug,
could you please test?

thanks,
jirka

---
tools/perf/util/symbol.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index fdad4eee..fe86612 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -64,7 +64,7 @@ static enum dso_binary_type binary_type_symtab[] = {
DSO_BINARY_TYPE__NOT_FOUND,
};

-#define DSO_BINARY_TYPE__SYMTAB_CNT sizeof(binary_type_symtab)
+#define DSO_BINARY_TYPE__SYMTAB_CNT ARRAY_SIZE(binary_type_symtab)

static enum dso_binary_type binary_type_data[] = {
DSO_BINARY_TYPE__BUILD_ID_CACHE,
@@ -72,7 +72,7 @@ static enum dso_binary_type binary_type_data[] = {
DSO_BINARY_TYPE__NOT_FOUND,
};

-#define DSO_BINARY_TYPE__DATA_CNT sizeof(binary_type_data)
+#define DSO_BINARY_TYPE__DATA_CNT ARRAY_SIZE(binary_type_data)

int dso__name_len(const struct dso *dso)
{
--
1.7.7.6


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