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-rw-r--r--tools/perf/builtin-record.c49
-rw-r--r--tools/perf/util/data_map.c37
-rw-r--r--tools/perf/util/event.h7
-rw-r--r--tools/perf/util/header.c10
-rw-r--r--tools/perf/util/header.h4
-rw-r--r--tools/perf/util/map.c14
-rw-r--r--tools/perf/util/symbol.c78
-rw-r--r--tools/perf/util/symbol.h10
8 files changed, 179 insertions, 30 deletions
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 4a73d89ce5d..ab333812ace 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -17,6 +17,7 @@
#include "util/header.h"
#include "util/event.h"
#include "util/debug.h"
+#include "util/symbol.h"
#include <unistd.h>
#include <sched.h>
@@ -109,9 +110,21 @@ static void write_output(void *buf, size_t size)
}
}
+static void write_event(event_t *buf, size_t size)
+{
+ /*
+ * Add it to the list of DSOs, so that when we finish this
+ * record session we can pick the available build-ids.
+ */
+ if (buf->header.type == PERF_RECORD_MMAP)
+ dsos__findnew(buf->mmap.filename);
+
+ write_output(buf, size);
+}
+
static int process_synthesized_event(event_t *event)
{
- write_output(event, event->header.size);
+ write_event(event, event->header.size);
return 0;
}
@@ -163,14 +176,14 @@ static void mmap_read(struct mmap_data *md)
size = md->mask + 1 - (old & md->mask);
old += size;
- write_output(buf, size);
+ write_event(buf, size);
}
buf = &data[old & md->mask];
size = head - old;
old += size;
- write_output(buf, size);
+ write_event(buf, size);
md->prev = old;
mmap_write_tail(md, old);
@@ -365,10 +378,38 @@ static void open_counters(int cpu, pid_t pid)
nr_cpu++;
}
+static bool write_buildid_table(void)
+{
+ struct dso *pos;
+ bool have_buildid = false;
+
+ list_for_each_entry(pos, &dsos, node) {
+ struct build_id_event b;
+ size_t len;
+
+ if (filename__read_build_id(pos->long_name,
+ &b.build_id,
+ sizeof(b.build_id)) < 0)
+ continue;
+ have_buildid = true;
+ memset(&b.header, 0, sizeof(b.header));
+ len = strlen(pos->long_name) + 1;
+ len = ALIGN(len, 64);
+ b.header.size = sizeof(b) + len;
+ write_output(&b, sizeof(b));
+ write_output(pos->long_name, len);
+ }
+
+ return have_buildid;
+}
+
static void atexit_header(void)
{
header->data_size += bytes_written;
+ if (write_buildid_table())
+ perf_header__set_feat(header, HEADER_BUILD_ID);
+
perf_header__write(header, output);
}
@@ -572,6 +613,8 @@ int cmd_record(int argc, const char **argv, const char *prefix __used)
{
int counter;
+ symbol__init(0);
+
argc = parse_options(argc, argv, options, record_usage,
PARSE_OPT_STOP_AT_NON_OPTION);
if (!argc && target_pid == -1 && !system_wide)
diff --git a/tools/perf/util/data_map.c b/tools/perf/util/data_map.c
index c458db9ede6..00a9c114c8d 100644
--- a/tools/perf/util/data_map.c
+++ b/tools/perf/util/data_map.c
@@ -70,6 +70,39 @@ process_event(event_t *event, unsigned long offset, unsigned long head)
}
}
+static int perf_header__read_build_ids(const struct perf_header *self,
+ int input, off_t file_size)
+{
+ off_t offset = self->data_offset + self->data_size;
+ struct build_id_event bev;
+ char filename[PATH_MAX];
+ int err = -1;
+
+ if (lseek(input, offset, SEEK_SET) < 0)
+ return -1;
+
+ while (offset < file_size) {
+ struct dso *dso;
+ ssize_t len;
+
+ if (read(input, &bev, sizeof(bev)) != sizeof(bev))
+ goto out;
+
+ len = bev.header.size - sizeof(bev);
+ if (read(input, filename, len) != len)
+ goto out;
+
+ dso = dsos__findnew(filename);
+ if (dso != NULL)
+ dso__set_build_id(dso, &bev.build_id);
+
+ offset += bev.header.size;
+ }
+ err = 0;
+out:
+ return err;
+}
+
int mmap_dispatch_perf_file(struct perf_header **pheader,
const char *input_name,
int force,
@@ -130,6 +163,10 @@ int mmap_dispatch_perf_file(struct perf_header **pheader,
if (curr_handler->sample_type_check(sample_type) < 0)
exit(-1);
+ if (perf_header__has_feat(header, HEADER_BUILD_ID) &&
+ perf_header__read_build_ids(header, input, input_stat.st_size))
+ pr_debug("failed to read buildids, continuing...\n");
+
if (load_kernel(NULL) < 0) {
perror("failed to load kernel symbols");
return EXIT_FAILURE;
diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
index 0a443bea68d..34c6fcb82d9 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -61,6 +61,13 @@ struct sample_event{
u64 array[];
};
+#define BUILD_ID_SIZE 20
+
+struct build_id_event {
+ struct perf_event_header header;
+ u8 build_id[ALIGN(BUILD_ID_SIZE, sizeof(u64))];
+ char filename[];
+};
typedef union event_union {
struct perf_event_header header;
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 7d26659b806..050f543fd96 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -149,6 +149,16 @@ void perf_header__feat_trace_info(struct perf_header *header)
set_bit(HEADER_TRACE_INFO, header->adds_features);
}
+void perf_header__set_feat(struct perf_header *self, int feat)
+{
+ set_bit(feat, self->adds_features);
+}
+
+bool perf_header__has_feat(const struct perf_header *self, int feat)
+{
+ return test_bit(feat, self->adds_features);
+}
+
static void do_write(int fd, void *buf, size_t size)
{
while (size) {
diff --git a/tools/perf/util/header.h b/tools/perf/util/header.h
index 2ea9dfb1236..2f233c5db7e 100644
--- a/tools/perf/util/header.h
+++ b/tools/perf/util/header.h
@@ -3,6 +3,7 @@
#include "../../../include/linux/perf_event.h"
#include <sys/types.h>
+#include <stdbool.h>
#include "types.h"
#include <linux/bitmap.h>
@@ -15,6 +16,7 @@ struct perf_header_attr {
};
#define HEADER_TRACE_INFO 1
+#define HEADER_BUILD_ID 2
#define HEADER_FEAT_BITS 256
@@ -48,6 +50,8 @@ u64 perf_header__sample_type(struct perf_header *header);
struct perf_event_attr *
perf_header__find_attr(u64 id, struct perf_header *header);
void perf_header__feat_trace_info(struct perf_header *header);
+void perf_header__set_feat(struct perf_header *self, int feat);
+bool perf_header__has_feat(const struct perf_header *self, int feat);
struct perf_header *perf_header__new(void);
diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c
index 33f868420d7..94ca95073c4 100644
--- a/tools/perf/util/map.c
+++ b/tools/perf/util/map.c
@@ -84,8 +84,18 @@ map__find_symbol(struct map *self, u64 ip, symbol_filter_t filter)
int nr = dso__load(self->dso, self, filter);
if (nr < 0) {
- pr_warning("Failed to open %s, continuing without symbols\n",
- self->dso->long_name);
+ if (self->dso->has_build_id) {
+ char sbuild_id[BUILD_ID_SIZE * 2 + 1];
+
+ build_id__sprintf(self->dso->build_id,
+ sizeof(self->dso->build_id),
+ sbuild_id);
+ pr_warning("%s with build id %s not found",
+ self->dso->long_name, sbuild_id);
+ } else
+ pr_warning("Failed to open %s",
+ self->dso->long_name);
+ pr_warning(", continuing without symbols\n");
return NULL;
} else if (nr == 0) {
const char *name = self->dso->long_name;
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index e7c7cdb851c..a2e95ce1f22 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -121,7 +121,8 @@ struct dso *dso__new(const char *name)
self->find_symbol = dso__find_symbol;
self->slen_calculated = 0;
self->origin = DSO__ORIG_NOT_FOUND;
- self->loaded = false;
+ self->loaded = 0;
+ self->has_build_id = 0;
}
return self;
@@ -148,6 +149,12 @@ void dso__delete(struct dso *self)
free(self);
}
+void dso__set_build_id(struct dso *self, void *build_id)
+{
+ memcpy(self->build_id, build_id, sizeof(self->build_id));
+ self->has_build_id = 1;
+}
+
static void dso__insert_symbol(struct dso *self, struct symbol *sym)
{
struct rb_node **p = &self->syms.rb_node;
@@ -190,11 +197,30 @@ struct symbol *dso__find_symbol(struct dso *self, u64 ip)
return NULL;
}
-size_t dso__fprintf(struct dso *self, FILE *fp)
+int build_id__sprintf(u8 *self, int len, char *bf)
{
- size_t ret = fprintf(fp, "dso: %s\n", self->short_name);
+ char *bid = bf;
+ u8 *raw = self;
+ int i;
+ for (i = 0; i < len; ++i) {
+ sprintf(bid, "%02x", *raw);
+ ++raw;
+ bid += 2;
+ }
+
+ return raw - self;
+}
+
+size_t dso__fprintf(struct dso *self, FILE *fp)
+{
+ char sbuild_id[BUILD_ID_SIZE * 2 + 1];
struct rb_node *nd;
+ size_t ret;
+
+ build_id__sprintf(self->build_id, sizeof(self->build_id), sbuild_id);
+ ret = fprintf(fp, "dso: %s (%s)\n", self->short_name, sbuild_id);
+
for (nd = rb_first(&self->syms); nd; nd = rb_next(nd)) {
struct symbol *pos = rb_entry(nd, struct symbol, rb_node);
ret += symbol__fprintf(pos, fp);
@@ -825,8 +851,6 @@ out_close:
return err;
}
-#define BUILD_ID_SIZE 20
-
int filename__read_build_id(const char *filename, void *bf, size_t size)
{
int fd, err = -1;
@@ -845,7 +869,7 @@ int filename__read_build_id(const char *filename, void *bf, size_t size)
elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
if (elf == NULL) {
- pr_err("%s: cannot read %s ELF file.\n", __func__, filename);
+ pr_debug2("%s: cannot read %s ELF file.\n", __func__, filename);
goto out_close;
}
@@ -874,9 +898,9 @@ out:
static char *dso__read_build_id(struct dso *self)
{
- int i, len;
- char *build_id = NULL, *bid;
- unsigned char rawbf[BUILD_ID_SIZE], *raw;
+ int len;
+ char *build_id = NULL;
+ unsigned char rawbf[BUILD_ID_SIZE];
len = filename__read_build_id(self->long_name, rawbf, sizeof(rawbf));
if (len < 0)
@@ -885,15 +909,8 @@ static char *dso__read_build_id(struct dso *self)
build_id = malloc(len * 2 + 1);
if (build_id == NULL)
goto out;
- bid = build_id;
- raw = rawbf;
- for (i = 0; i < len; ++i) {
- sprintf(bid, "%02x", *raw);
- ++raw;
- bid += 2;
- }
- pr_debug2("%s(%s): %s\n", __func__, self->long_name, build_id);
+ build_id__sprintf(rawbf, len, build_id);
out:
return build_id;
}
@@ -922,7 +939,7 @@ int dso__load(struct dso *self, struct map *map, symbol_filter_t filter)
int ret = -1;
int fd;
- self->loaded = true;
+ self->loaded = 1;
if (!name)
return -1;
@@ -940,6 +957,8 @@ int dso__load(struct dso *self, struct map *map, symbol_filter_t filter)
more:
do {
+ int berr = 0;
+
self->origin++;
switch (self->origin) {
case DSO__ORIG_FEDORA:
@@ -956,8 +975,7 @@ more:
snprintf(name, size,
"/usr/lib/debug/.build-id/%.2s/%s.debug",
build_id, build_id + 2);
- free(build_id);
- break;
+ goto compare_build_id;
}
self->origin++;
/* Fall thru */
@@ -969,6 +987,22 @@ more:
goto out;
}
+ if (self->has_build_id) {
+ bool match;
+ build_id = malloc(BUILD_ID_SIZE);
+ if (build_id == NULL)
+ goto more;
+ berr = filename__read_build_id(name, build_id,
+ BUILD_ID_SIZE);
+compare_build_id:
+ match = berr > 0 && memcmp(build_id, self->build_id,
+ sizeof(self->build_id)) == 0;
+ free(build_id);
+ build_id = NULL;
+ if (!match)
+ goto more;
+ }
+
fd = open(name, O_RDONLY);
} while (fd < 0);
@@ -1034,7 +1068,7 @@ static int dso__load_module_sym(struct dso *self, struct map *map,
{
int err = 0, fd = open(self->long_name, O_RDONLY);
- self->loaded = true;
+ self->loaded = 1;
if (fd < 0) {
pr_err("%s: cannot open %s\n", __func__, self->long_name);
@@ -1225,7 +1259,7 @@ static int dso__load_vmlinux(struct dso *self, struct map *map,
{
int err, fd = open(vmlinux, O_RDONLY);
- self->loaded = true;
+ self->loaded = 1;
if (fd < 0)
return -1;
diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
index e0d4a583f8d..f8c1899af48 100644
--- a/tools/perf/util/symbol.h
+++ b/tools/perf/util/symbol.h
@@ -60,10 +60,12 @@ struct dso {
struct list_head node;
struct rb_root syms;
struct symbol *(*find_symbol)(struct dso *, u64 ip);
- unsigned char adjust_symbols;
- unsigned char slen_calculated;
- bool loaded;
+ u8 adjust_symbols:1;
+ u8 slen_calculated:1;
+ u8 loaded:1;
+ u8 has_build_id:1;
unsigned char origin;
+ u8 build_id[BUILD_ID_SIZE];
const char *short_name;
char *long_name;
char name[0];
@@ -81,8 +83,10 @@ void dsos__fprintf(FILE *fp);
size_t dso__fprintf(struct dso *self, FILE *fp);
char dso__symtab_origin(const struct dso *self);
+void dso__set_build_id(struct dso *self, void *build_id);
int filename__read_build_id(const char *filename, void *bf, size_t size);
+int build_id__sprintf(u8 *self, int len, char *bf);
int load_kernel(symbol_filter_t filter);
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-11 05:38:09 +0000