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authorArnaldo Carvalho de Melo <acme@redhat.com>2009-08-06 14:43:17 -0300
committerIngo Molnar <mingo@elte.hu>2009-08-09 12:54:36 +0200
commit94cb9e385d5b4d55a5ae389baa10ad2835ea39bb (patch)
treeb089b9d5a20e9f35ced28880f6a98c511c89040e /tools
parent8f18aec535b5ca513dd13b531730177d35175ffa (diff)
downloadlwn-94cb9e385d5b4d55a5ae389baa10ad2835ea39bb.tar.gz
lwn-94cb9e385d5b4d55a5ae389baa10ad2835ea39bb.zip
perf report: Add debug help for the finding of symbol bugs - show the symtab origin (DSO, build-id, kernel, etc)
Used with perf report --verbose: [acme@doppio linux-2.6-tip]$ perf report -v | head -16 5.17% firefox /usr/lib64/xulrunner-1.9.1/libxul.so 0x00000000005d8eee f [.] imgContainer::DrawFrameTo(gfxIImageFrame*, gfxIImageFrame*, nsRect&) 2.56% firefox /lib64/libpthread-2.10.1.so 0x0000000000008e02 d [.] __pthread_mutex_lock_internal 1.94% firefox /usr/lib64/xulrunner-1.9.1/libxul.so 0x0000000000d0af8f f [.] SearchTable 1.75% firefox [kernel] 0xffffffffff60013b k [.] vread_hpet 1.63% firefox /lib64/libpthread-2.10.1.so 0x000000000000a404 d [.] __pthread_mutex_unlock 1.47% firefox /usr/lib64/xulrunner-1.9.1/libmozjs.so 0x00000000000482ea f [.] js_Interpret 1.42% firefox /usr/lib64/xulrunner-1.9.1/libmozjs.so 0x000000000003eda3 f [.] JS_CallTracer 1.24% firefox [kernel] 0xffffffff8102ca4a k [k] read_hpet 1.16% firefox [kernel] 0xffffffff810f3dd4 k [k] fget_light 1.11% firefox /usr/lib64/xulrunner-1.9.1/libmozjs.so 0x00000000000567ff f [.] js_TraceObject 0.98% firefox /usr/lib64/firefox-3.5.2/firefox 0x000000000000dd23 b [.] arena_ralloc [acme@doppio linux-2.6-tip]$ The new field is just after the symbol address. To help in figuring out symbol resolution bugs. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Acked-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/builtin-report.c3
-rw-r--r--tools/perf/util/symbol.c57
-rw-r--r--tools/perf/util/symbol.h2
3 files changed, 50 insertions, 12 deletions
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 84205462e07b..a5e2f8df411c 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -700,7 +700,8 @@ sort__sym_print(FILE *fp, struct hist_entry *self, unsigned int width __used)
size_t ret = 0;
if (verbose)
- ret += repsep_fprintf(fp, "%#018llx ", (u64)self->ip);
+ ret += repsep_fprintf(fp, "%#018llx %c ", (u64)self->ip,
+ dso__symtab_origin(self->dso));
ret += repsep_fprintf(fp, "[%c] ", self->level);
if (self->sym) {
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index 16ddca202948..f1dcede14307 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -24,6 +24,16 @@ const char *sym_hist_filter;
#define DMGL_ANSI (1 << 1) /* Include const, volatile, etc */
#endif
+enum dso_origin {
+ DSO__ORIG_KERNEL = 0,
+ DSO__ORIG_JAVA_JIT,
+ DSO__ORIG_FEDORA,
+ DSO__ORIG_UBUNTU,
+ DSO__ORIG_BUILDID,
+ DSO__ORIG_DSO,
+ DSO__ORIG_NOT_FOUND,
+};
+
static struct symbol *symbol__new(u64 start, u64 len,
const char *name, unsigned int priv_size,
u64 obj_start, int verbose)
@@ -81,6 +91,7 @@ struct dso *dso__new(const char *name, unsigned int sym_priv_size)
self->sym_priv_size = sym_priv_size;
self->find_symbol = dso__find_symbol;
self->slen_calculated = 0;
+ self->origin = DSO__ORIG_NOT_FOUND;
}
return self;
@@ -710,7 +721,7 @@ static char *dso__read_build_id(struct dso *self, int verbose)
++raw;
bid += 2;
}
- if (verbose)
+ if (verbose >= 2)
printf("%s(%s): %s\n", __func__, self->name, build_id);
out_elf_end:
elf_end(elf);
@@ -720,11 +731,26 @@ out:
return build_id;
}
+char dso__symtab_origin(const struct dso *self)
+{
+ static const char origin[] = {
+ [DSO__ORIG_KERNEL] = 'k',
+ [DSO__ORIG_JAVA_JIT] = 'j',
+ [DSO__ORIG_FEDORA] = 'f',
+ [DSO__ORIG_UBUNTU] = 'u',
+ [DSO__ORIG_BUILDID] = 'b',
+ [DSO__ORIG_DSO] = 'd',
+ };
+
+ if (self == NULL || self->origin == DSO__ORIG_NOT_FOUND)
+ return '!';
+ return origin[self->origin];
+}
+
int dso__load(struct dso *self, symbol_filter_t filter, int verbose)
{
int size = PATH_MAX;
char *name = malloc(size), *build_id = NULL;
- int variant = 0;
int ret = -1;
int fd;
@@ -733,19 +759,26 @@ int dso__load(struct dso *self, symbol_filter_t filter, int verbose)
self->adjust_symbols = 0;
- if (strncmp(self->name, "/tmp/perf-", 10) == 0)
- return dso__load_perf_map(self, filter, verbose);
+ if (strncmp(self->name, "/tmp/perf-", 10) == 0) {
+ ret = dso__load_perf_map(self, filter, verbose);
+ self->origin = ret > 0 ? DSO__ORIG_JAVA_JIT :
+ DSO__ORIG_NOT_FOUND;
+ return ret;
+ }
+
+ self->origin = DSO__ORIG_FEDORA - 1;
more:
do {
- switch (variant) {
- case 0: /* Fedora */
+ self->origin++;
+ switch (self->origin) {
+ case DSO__ORIG_FEDORA:
snprintf(name, size, "/usr/lib/debug%s.debug", self->name);
break;
- case 1: /* Ubuntu */
+ case DSO__ORIG_UBUNTU:
snprintf(name, size, "/usr/lib/debug%s", self->name);
break;
- case 2:
+ case DSO__ORIG_BUILDID:
build_id = dso__read_build_id(self, verbose);
if (build_id != NULL) {
snprintf(name, size,
@@ -754,16 +787,15 @@ more:
free(build_id);
break;
}
- variant++;
+ self->origin++;
/* Fall thru */
- case 3: /* Sane people */
+ case DSO__ORIG_DSO:
snprintf(name, size, "%s", self->name);
break;
default:
goto out;
}
- variant++;
fd = open(name, O_RDONLY);
} while (fd < 0);
@@ -899,6 +931,9 @@ int dso__load_kernel(struct dso *self, const char *vmlinux,
if (err <= 0)
err = dso__load_kallsyms(self, filter, verbose);
+ if (err > 0)
+ self->origin = DSO__ORIG_KERNEL;
+
return err;
}
diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
index 2f92b21c712d..1e003ec2f4b1 100644
--- a/tools/perf/util/symbol.h
+++ b/tools/perf/util/symbol.h
@@ -26,6 +26,7 @@ struct dso {
unsigned int sym_priv_size;
unsigned char adjust_symbols;
unsigned char slen_calculated;
+ unsigned char origin;
char name[0];
};
@@ -49,6 +50,7 @@ int dso__load_modules(struct dso *self, symbol_filter_t filter, int verbose);
int dso__load(struct dso *self, symbol_filter_t filter, int verbose);
size_t dso__fprintf(struct dso *self, FILE *fp);
+char dso__symtab_origin(const struct dso *self);
void symbol__init(void);
#endif /* _PERF_SYMBOL_ */