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perf tools: Pass build_id object to filename__read_build_id()

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Pass a build_id object to filename__read_build_id function, so it can
populate the size of the build_id object.

Changing filename__read_build_id() code for both ELF/non-ELF code.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Ian Rogers <irogers@google.com>
Link: https://lore.kernel.org/r/20201013192441.1299447-3-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa 2020-10-13 21:24:34 +02:00 committed by Arnaldo Carvalho de Melo
parent 0aba7f036a
commit f766819cd5
11 changed files with 60 additions and 57 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
tools/perf/bench/inject-buildid.c
View File

@ -84,7 +84,7 @@ static int add_dso(const char *fpath, const struct stat *sb __maybe_unused,
if (typeflag == FTW_D || typeflag == FTW_SL)
return 0;
if (filename__read_build_id(fpath, bid.data, sizeof(bid.data)) < 0)
if (filename__read_build_id(fpath, &bid) < 0)
return 0;
dso->name = realpath(fpath, NULL);

25
tools/perf/builtin-buildid-cache.c
View File

@ -174,19 +174,19 @@ static int build_id_cache__add_kcore(const char *filename, bool force)
static int build_id_cache__add_file(const char *filename, struct nsinfo *nsi)
{
char sbuild_id[SBUILD_ID_SIZE];
u8 build_id[BUILD_ID_SIZE];
struct build_id bid;
int err;
struct nscookie nsc;
nsinfo__mountns_enter(nsi, &nsc);
err = filename__read_build_id(filename, &build_id, sizeof(build_id));
err = filename__read_build_id(filename, &bid);
nsinfo__mountns_exit(&nsc);
if (err < 0) {
pr_debug("Couldn't read a build-id in %s\n", filename);
return -1;
}
build_id__sprintf(build_id, sizeof(build_id), sbuild_id);
build_id__sprintf(bid.data, sizeof(bid.data), sbuild_id);
err = build_id_cache__add_s(sbuild_id, filename, nsi,
false, false);
pr_debug("Adding %s %s: %s\n", sbuild_id, filename,
@ -196,21 +196,21 @@ static int build_id_cache__add_file(const char *filename, struct nsinfo *nsi)
static int build_id_cache__remove_file(const char *filename, struct nsinfo *nsi)
{
u8 build_id[BUILD_ID_SIZE];
char sbuild_id[SBUILD_ID_SIZE];
struct build_id bid;
struct nscookie nsc;
int err;
nsinfo__mountns_enter(nsi, &nsc);
err = filename__read_build_id(filename, &build_id, sizeof(build_id));
err = filename__read_build_id(filename, &bid);
nsinfo__mountns_exit(&nsc);
if (err < 0) {
pr_debug("Couldn't read a build-id in %s\n", filename);
return -1;
}
build_id__sprintf(build_id, sizeof(build_id), sbuild_id);
build_id__sprintf(bid.data, sizeof(bid.data), sbuild_id);
err = build_id_cache__remove_s(sbuild_id);
pr_debug("Removing %s %s: %s\n", sbuild_id, filename,
err ? "FAIL" : "Ok");
@ -274,17 +274,16 @@ static int build_id_cache__purge_all(void)
static bool dso__missing_buildid_cache(struct dso *dso, int parm __maybe_unused)
{
char filename[PATH_MAX];
u8 build_id[BUILD_ID_SIZE];
struct build_id bid;
if (dso__build_id_filename(dso, filename, sizeof(filename), false) &&
filename__read_build_id(filename, build_id,
sizeof(build_id)) != sizeof(build_id)) {
filename__read_build_id(filename, &bid) == -1) {
if (errno == ENOENT)
return false;
pr_warning("Problems with %s file, consider removing it from the cache\n",
filename);
} else if (memcmp(dso->bid.data, build_id, sizeof(dso->bid.data))) {
} else if (memcmp(dso->bid.data, bid.data, bid.size)) {
pr_warning("Problems with %s file, consider removing it from the cache\n",
filename);
}
@ -300,14 +299,14 @@ static int build_id_cache__fprintf_missing(struct perf_session *session, FILE *f
static int build_id_cache__update_file(const char *filename, struct nsinfo *nsi)
{
u8 build_id[BUILD_ID_SIZE];
char sbuild_id[SBUILD_ID_SIZE];
struct build_id bid;
struct nscookie nsc;
int err;
nsinfo__mountns_enter(nsi, &nsc);
err = filename__read_build_id(filename, &build_id, sizeof(build_id));
err = filename__read_build_id(filename, &bid);
nsinfo__mountns_exit(&nsc);
if (err < 0) {
pr_debug("Couldn't read a build-id in %s\n", filename);
@ -315,7 +314,7 @@ static int build_id_cache__update_file(const char *filename, struct nsinfo *nsi)
}
err = 0;
build_id__sprintf(build_id, sizeof(build_id), sbuild_id);
build_id__sprintf(bid.data, sizeof(bid.data), sbuild_id);
if (build_id_cache__cached(sbuild_id))
err = build_id_cache__remove_s(sbuild_id);

4
tools/perf/builtin-inject.c
View File

@ -522,10 +522,8 @@ static int dso__read_build_id(struct dso *dso)
return 0;
nsinfo__mountns_enter(dso->nsinfo, &nsc);
if (filename__read_build_id(dso->long_name, dso->bid.data,
sizeof(dso->bid.data)) > 0) {
if (filename__read_build_id(dso->long_name, &dso->bid) > 0)
dso->has_build_id = true;
}
nsinfo__mountns_exit(&nsc);
return dso->has_build_id ? 0 : -1;

10
tools/perf/tests/pe-file-parsing.c
View File

@ -24,7 +24,7 @@ static int run_dir(const char *d)
{
char filename[PATH_MAX];
char debugfile[PATH_MAX];
char build_id[BUILD_ID_SIZE];
struct build_id bid;
char debuglink[PATH_MAX];
char expect_build_id[] = {
0x5a, 0x0f, 0xd8, 0x82, 0xb5, 0x30, 0x84, 0x22,
@ -36,10 +36,10 @@ static int run_dir(const char *d)
int ret;
scnprintf(filename, PATH_MAX, "%s/pe-file.exe", d);
ret = filename__read_build_id(filename, build_id, BUILD_ID_SIZE);
ret = filename__read_build_id(filename, &bid);
TEST_ASSERT_VAL("Failed to read build_id",
ret == sizeof(expect_build_id));
TEST_ASSERT_VAL("Wrong build_id", !memcmp(build_id, expect_build_id,
TEST_ASSERT_VAL("Wrong build_id", !memcmp(bid.data, expect_build_id,
sizeof(expect_build_id)));
ret = filename__read_debuglink(filename, debuglink, PATH_MAX);
@ -48,10 +48,10 @@ static int run_dir(const char *d)
!strcmp(debuglink, expect_debuglink));
scnprintf(debugfile, PATH_MAX, "%s/%s", d, debuglink);
ret = filename__read_build_id(debugfile, build_id, BUILD_ID_SIZE);
ret = filename__read_build_id(debugfile, &bid);
TEST_ASSERT_VAL("Failed to read debug file build_id",
ret == sizeof(expect_build_id));
TEST_ASSERT_VAL("Wrong build_id", !memcmp(build_id, expect_build_id,
TEST_ASSERT_VAL("Wrong build_id", !memcmp(bid.data, expect_build_id,
sizeof(expect_build_id)));
dso = dso__new(filename);

6
tools/perf/tests/sdt.c
View File

@ -28,16 +28,16 @@ static int target_function(void)
static int build_id_cache__add_file(const char *filename)
{
char sbuild_id[SBUILD_ID_SIZE];
u8 build_id[BUILD_ID_SIZE];
struct build_id bid;
int err;
err = filename__read_build_id(filename, &build_id, sizeof(build_id));
err = filename__read_build_id(filename, &bid);
if (err < 0) {
pr_debug("Failed to read build id of %s\n", filename);
return err;
}
build_id__sprintf(build_id, sizeof(build_id), sbuild_id);
build_id__sprintf(bid.data, sizeof(bid.data), sbuild_id);
err = build_id_cache__add_s(sbuild_id, filename, NULL, false, false);
if (err < 0)
pr_debug("Failed to add build id cache of %s\n", filename);

8
tools/perf/util/build-id.c
View File

@ -130,16 +130,14 @@ int sysfs__sprintf_build_id(const char *root_dir, char *sbuild_id)
int filename__sprintf_build_id(const char *pathname, char *sbuild_id)
{
u8 build_id[BUILD_ID_SIZE];
struct build_id bid;
int ret;
ret = filename__read_build_id(pathname, build_id, sizeof(build_id));
ret = filename__read_build_id(pathname, &bid);
if (ret < 0)
return ret;
else if (ret != sizeof(build_id))
return -EINVAL;
return build_id__sprintf(build_id, sizeof(build_id), sbuild_id);
return build_id__sprintf(bid.data, sizeof(bid.data), sbuild_id);
}
/* asnprintf consolidates asprintf and snprintf */

3
tools/perf/util/dsos.c
View File

@ -73,8 +73,7 @@ bool __dsos__read_build_ids(struct list_head *head, bool with_hits)
continue;
}
nsinfo__mountns_enter(pos->nsinfo, &nsc);
if (filename__read_build_id(pos->long_name, pos->bid.data,
sizeof(pos->bid.data)) > 0) {
if (filename__read_build_id(pos->long_name, &pos->bid) > 0) {
have_build_id = true;
pos->has_build_id = true;
}

16
tools/perf/util/symbol-elf.c
View File

@ -534,8 +534,9 @@ out:
#ifdef HAVE_LIBBFD_BUILDID_SUPPORT
int filename__read_build_id(const char *filename, void *bf, size_t size)
int filename__read_build_id(const char *filename, struct build_id *bid)
{
size_t size = sizeof(bid->data);
int err = -1;
bfd *abfd;
@ -551,9 +552,9 @@ int filename__read_build_id(const char *filename, void *bf, size_t size)
if (!abfd->build_id || abfd->build_id->size > size)
goto out_close;
memcpy(bf, abfd->build_id->data, abfd->build_id->size);
memset(bf + abfd->build_id->size, 0, size - abfd->build_id->size);
err = abfd->build_id->size;
memcpy(bid->data, abfd->build_id->data, abfd->build_id->size);
memset(bid->data + abfd->build_id->size, 0, size - abfd->build_id->size);
err = bid->size = abfd->build_id->size;
out_close:
bfd_close(abfd);
@ -562,8 +563,9 @@ out_close:
#else // HAVE_LIBBFD_BUILDID_SUPPORT
int filename__read_build_id(const char *filename, void *bf, size_t size)
int filename__read_build_id(const char *filename, struct build_id *bid)
{
size_t size = sizeof(bid->data);
int fd, err = -1;
Elf *elf;
@ -580,7 +582,9 @@ int filename__read_build_id(const char *filename, void *bf, size_t size)
goto out_close;
}
err = elf_read_build_id(elf, bf, size);
err = elf_read_build_id(elf, bid->data, size);
if (err > 0)
bid->size = err;
elf_end(elf);
out_close:

34
tools/perf/util/symbol-minimal.c
View File

@ -31,9 +31,10 @@ static bool check_need_swap(int file_endian)
#define NT_GNU_BUILD_ID 3
static int read_build_id(void *note_data, size_t note_len, void *bf,
size_t size, bool need_swap)
static int read_build_id(void *note_data, size_t note_len, struct build_id *bid,
bool need_swap)
{
size_t size = sizeof(bid->data);
struct {
u32 n_namesz;
u32 n_descsz;
@ -63,8 +64,9 @@ static int read_build_id(void *note_data, size_t note_len, void *bf,
nhdr->n_namesz == sizeof("GNU")) {
if (memcmp(name, "GNU", sizeof("GNU")) == 0) {
size_t sz = min(size, descsz);
memcpy(bf, ptr, sz);
memset(bf + sz, 0, size - sz);
memcpy(bid->data, ptr, sz);
memset(bid->data + sz, 0, size - sz);
bid->size = sz;
return 0;
}
}
@ -84,7 +86,7 @@ int filename__read_debuglink(const char *filename __maybe_unused,
/*
* Just try PT_NOTE header otherwise fails
*/
int filename__read_build_id(const char *filename, void *bf, size_t size)
int filename__read_build_id(const char *filename, struct build_id *bid)
{
FILE *fp;
int ret = -1;
@ -156,9 +158,9 @@ int filename__read_build_id(const char *filename, void *bf, size_t size)
if (fread(buf, buf_size, 1, fp) != 1)
goto out_free;
ret = read_build_id(buf, buf_size, bf, size, need_swap);
ret = read_build_id(buf, buf_size, bid, need_swap);
if (ret == 0)
ret = size;
ret = bid->size;
break;
}
} else {
@ -207,9 +209,9 @@ int filename__read_build_id(const char *filename, void *bf, size_t size)
if (fread(buf, buf_size, 1, fp) != 1)
goto out_free;
ret = read_build_id(buf, buf_size, bf, size, need_swap);
ret = read_build_id(buf, buf_size, bid, need_swap);
if (ret == 0)
ret = size;
ret = bid->size;
break;
}
}
@ -220,8 +222,9 @@ out:
return ret;
}
int sysfs__read_build_id(const char *filename, void *build_id, size_t size)
int sysfs__read_build_id(const char *filename, void *build_id, size_t size __maybe_unused)
{
struct build_id bid;
int fd;
int ret = -1;
struct stat stbuf;
@ -243,7 +246,9 @@ int sysfs__read_build_id(const char *filename, void *build_id, size_t size)
if (read(fd, buf, buf_size) != (ssize_t) buf_size)
goto out_free;
ret = read_build_id(buf, buf_size, build_id, size, false);
ret = read_build_id(buf, buf_size, &bid, false);
if (ret > 0)
memcpy(build_id, bid.data, bid.size);
out_free:
free(buf);
out:
@ -339,16 +344,15 @@ int dso__load_sym(struct dso *dso, struct map *map __maybe_unused,
struct symsrc *runtime_ss __maybe_unused,
int kmodule __maybe_unused)
{
unsigned char build_id[BUILD_ID_SIZE];
struct build_id bid;
int ret;
ret = fd__is_64_bit(ss->fd);
if (ret >= 0)
dso->is_64_bit = ret;
if (filename__read_build_id(ss->name, build_id, BUILD_ID_SIZE) > 0) {
dso__set_build_id(dso, build_id);
}
if (filename__read_build_id(ss->name, &bid) > 0)
dso__set_build_id(dso, bid.data);
return 0;
}

6
tools/perf/util/symbol.c
View File

@ -1755,7 +1755,7 @@ int dso__load(struct dso *dso, struct map *map)
struct symsrc *syms_ss = NULL, *runtime_ss = NULL;
bool kmod;
bool perfmap;
unsigned char build_id[BUILD_ID_SIZE];
struct build_id bid;
struct nscookie nsc;
char newmapname[PATH_MAX];
const char *map_path = dso->long_name;
@ -1817,8 +1817,8 @@ int dso__load(struct dso *dso, struct map *map)
if (!dso->has_build_id &&
is_regular_file(dso->long_name)) {
__symbol__join_symfs(name, PATH_MAX, dso->long_name);
if (filename__read_build_id(name, build_id, BUILD_ID_SIZE) > 0)
dso__set_build_id(dso, build_id);
if (filename__read_build_id(name, &bid) > 0)
dso__set_build_id(dso, bid.data);
}
/*

3
tools/perf/util/symbol.h
View File

@ -23,6 +23,7 @@ struct dso;
struct map;
struct maps;
struct option;
struct build_id;
/*
* libelf 0.8.x and earlier do not support ELF_C_READ_MMAP;
@ -142,7 +143,7 @@ struct symbol *dso__next_symbol(struct symbol *sym);
enum dso_type dso__type_fd(int fd);
int filename__read_build_id(const char *filename, void *bf, size_t size);
int filename__read_build_id(const char *filename, struct build_id *id);
int sysfs__read_build_id(const char *filename, void *bf, size_t size);
int modules__parse(const char *filename, void *arg,
int (*process_module)(void *arg, const char *name,