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-rw-r--r--tools/perf/builtin-top.c109
1 files changed, 72 insertions, 37 deletions
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 4b91d8cf00ec..31f2e597800c 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -94,6 +94,7 @@ struct source_line {
static char *sym_filter = NULL;
struct sym_entry *sym_filter_entry = NULL;
+struct sym_entry *sym_filter_entry_sched = NULL;
static int sym_pcnt_filter = 5;
static int sym_counter = 0;
static int display_weighted = -1;
@@ -201,10 +202,9 @@ static void parse_source(struct sym_entry *syme)
len = sym->end - sym->start;
sprintf(command,
- "objdump --start-address=0x%016Lx "
- "--stop-address=0x%016Lx -dS %s",
- map->unmap_ip(map, sym->start),
- map->unmap_ip(map, sym->end), path);
+ "objdump --start-address=%#0*Lx --stop-address=%#0*Lx -dS %s",
+ BITS_PER_LONG / 4, map__rip_2objdump(map, sym->start),
+ BITS_PER_LONG / 4, map__rip_2objdump(map, sym->end), path);
file = popen(command, "r");
if (!file)
@@ -215,7 +215,7 @@ static void parse_source(struct sym_entry *syme)
while (!feof(file)) {
struct source_line *src;
size_t dummy = 0;
- char *c;
+ char *c, *sep;
src = malloc(sizeof(struct source_line));
assert(src != NULL);
@@ -234,14 +234,11 @@ static void parse_source(struct sym_entry *syme)
*source->lines_tail = src;
source->lines_tail = &src->next;
- if (strlen(src->line)>8 && src->line[8] == ':') {
- src->eip = strtoull(src->line, NULL, 16);
- src->eip = map->unmap_ip(map, src->eip);
- }
- if (strlen(src->line)>8 && src->line[16] == ':') {
- src->eip = strtoull(src->line, NULL, 16);
- src->eip = map->unmap_ip(map, src->eip);
- }
+ src->eip = strtoull(src->line, &sep, 16);
+ if (*sep == ':')
+ src->eip = map__objdump_2ip(map, src->eip);
+ else /* this line has no ip info (e.g. source line) */
+ src->eip = 0;
}
pclose(file);
out_assign:
@@ -276,6 +273,9 @@ static void record_precise_ip(struct sym_entry *syme, int counter, u64 ip)
goto out_unlock;
for (line = syme->src->lines; line; line = line->next) {
+ /* skip lines without IP info */
+ if (line->eip == 0)
+ continue;
if (line->eip == ip) {
line->count[counter]++;
break;
@@ -287,17 +287,20 @@ out_unlock:
pthread_mutex_unlock(&syme->src->lock);
}
+#define PATTERN_LEN (BITS_PER_LONG / 4 + 2)
+
static void lookup_sym_source(struct sym_entry *syme)
{
struct symbol *symbol = sym_entry__symbol(syme);
struct source_line *line;
- char pattern[PATH_MAX];
+ char pattern[PATTERN_LEN + 1];
- sprintf(pattern, "<%s>:", symbol->name);
+ sprintf(pattern, "%0*Lx <", BITS_PER_LONG / 4,
+ map__rip_2objdump(syme->map, symbol->start));
pthread_mutex_lock(&syme->src->lock);
for (line = syme->src->lines; line; line = line->next) {
- if (strstr(line->line, pattern)) {
+ if (memcmp(line->line, pattern, PATTERN_LEN) == 0) {
syme->src->source = line;
break;
}
@@ -667,7 +670,7 @@ static void prompt_symbol(struct sym_entry **target, const char *msg)
}
if (!found) {
- fprintf(stderr, "Sorry, %s is not active.\n", sym_filter);
+ fprintf(stderr, "Sorry, %s is not active.\n", buf);
sleep(1);
return;
} else
@@ -695,11 +698,9 @@ static void print_mapped_keys(void)
fprintf(stdout, "\t[f] profile display filter (count). \t(%d)\n", count_filter);
- if (symbol_conf.vmlinux_name) {
- fprintf(stdout, "\t[F] annotate display filter (percent). \t(%d%%)\n", sym_pcnt_filter);
- fprintf(stdout, "\t[s] annotate symbol. \t(%s)\n", name?: "NULL");
- fprintf(stdout, "\t[S] stop annotation.\n");
- }
+ fprintf(stdout, "\t[F] annotate display filter (percent). \t(%d%%)\n", sym_pcnt_filter);
+ fprintf(stdout, "\t[s] annotate symbol. \t(%s)\n", name?: "NULL");
+ fprintf(stdout, "\t[S] stop annotation.\n");
if (nr_counters > 1)
fprintf(stdout, "\t[w] toggle display weighted/count[E]r. \t(%d)\n", display_weighted ? 1 : 0);
@@ -725,14 +726,13 @@ static int key_mapped(int c)
case 'Q':
case 'K':
case 'U':
+ case 'F':
+ case 's':
+ case 'S':
return 1;
case 'E':
case 'w':
return nr_counters > 1 ? 1 : 0;
- case 'F':
- case 's':
- case 'S':
- return symbol_conf.vmlinux_name ? 1 : 0;
default:
break;
}
@@ -910,8 +910,12 @@ static int symbol_filter(struct map *map, struct symbol *sym)
syme = symbol__priv(sym);
syme->map = map;
syme->src = NULL;
- if (!sym_filter_entry && sym_filter && !strcmp(name, sym_filter))
- sym_filter_entry = syme;
+
+ if (!sym_filter_entry && sym_filter && !strcmp(name, sym_filter)) {
+ /* schedule initial sym_filter_entry setup */
+ sym_filter_entry_sched = syme;
+ sym_filter = NULL;
+ }
for (i = 0; skip_symbols[i]; i++) {
if (!strcmp(skip_symbols[i], name)) {
@@ -934,8 +938,11 @@ static void event__process_sample(const event_t *self,
struct addr_location al;
u8 origin = self->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
+ ++samples;
+
switch (origin) {
case PERF_RECORD_MISC_USER:
+ ++userspace_samples;
if (hide_user_symbols)
return;
break;
@@ -948,9 +955,38 @@ static void event__process_sample(const event_t *self,
}
if (event__preprocess_sample(self, session, &al, symbol_filter) < 0 ||
- al.sym == NULL || al.filtered)
+ al.filtered)
return;
+ if (al.sym == NULL) {
+ /*
+ * As we do lazy loading of symtabs we only will know if the
+ * specified vmlinux file is invalid when we actually have a
+ * hit in kernel space and then try to load it. So if we get
+ * here and there are _no_ symbols in the DSO backing the
+ * kernel map, bail out.
+ *
+ * We may never get here, for instance, if we use -K/
+ * --hide-kernel-symbols, even if the user specifies an
+ * invalid --vmlinux ;-)
+ */
+ if (al.map == session->vmlinux_maps[MAP__FUNCTION] &&
+ RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION])) {
+ pr_err("The %s file can't be used\n",
+ symbol_conf.vmlinux_name);
+ exit(1);
+ }
+
+ return;
+ }
+
+ /* let's see, whether we need to install initial sym_filter_entry */
+ if (sym_filter_entry_sched) {
+ sym_filter_entry = sym_filter_entry_sched;
+ sym_filter_entry_sched = NULL;
+ parse_source(sym_filter_entry);
+ }
+
syme = symbol__priv(al.sym);
if (!syme->skip) {
syme->count[counter]++;
@@ -960,9 +996,6 @@ static void event__process_sample(const event_t *self,
if (list_empty(&syme->node) || !syme->node.next)
__list_insert_active_sym(syme);
pthread_mutex_unlock(&active_symbols_lock);
- if (origin == PERF_RECORD_MISC_USER)
- ++userspace_samples;
- ++samples;
}
}
@@ -975,6 +1008,10 @@ static int event__process(event_t *event, struct perf_session *session)
case PERF_RECORD_MMAP:
event__process_mmap(event, session);
break;
+ case PERF_RECORD_FORK:
+ case PERF_RECORD_EXIT:
+ event__process_task(event, session);
+ break;
default:
break;
}
@@ -1244,7 +1281,7 @@ static const struct option options[] = {
OPT_BOOLEAN('i', "inherit", &inherit,
"child tasks inherit counters"),
OPT_STRING('s', "sym-annotate", &sym_filter, "symbol name",
- "symbol to annotate - requires -k option"),
+ "symbol to annotate"),
OPT_BOOLEAN('z', "zero", &zero,
"zero history across updates"),
OPT_INTEGER('F', "freq", &freq,
@@ -1280,16 +1317,14 @@ int cmd_top(int argc, const char **argv, const char *prefix __used)
symbol_conf.priv_size = (sizeof(struct sym_entry) +
(nr_counters + 1) * sizeof(unsigned long));
- if (symbol_conf.vmlinux_name == NULL)
- symbol_conf.try_vmlinux_path = true;
+
+ symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
if (symbol__init() < 0)
return -1;
if (delay_secs < 1)
delay_secs = 1;
- parse_source(sym_filter_entry);
-
/*
* User specified count overrides default frequency.
*/
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.