[PATCH 4/9] perf tools: Pass build_id object to build_id__sprintf

From: Jiri Olsa
Date: Tue Oct 13 2020 - 15:25:13 EST

Next message: Jiri Olsa: "[PATCH 5/9] perf tools: Pass build_id object to dso__set_build_id"
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Passing build_id object to build_id__sprintf function,
so it can operate with the proper size of build id.

This will create proper md5 build id readable names,
like following:
a50e350e97c43b4708d09bcd85ebfff7

instead of:
a50e350e97c43b4708d09bcd85ebfff700000000

Acked-by: Ian Rogers <irogers@xxxxxxxxxx>
Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
---
tools/perf/builtin-buildid-cache.c | 6 ++--
tools/perf/tests/sdt.c | 2 +-
tools/perf/util/annotate.c | 3 +-
tools/perf/util/build-id.c | 30 ++++++++++++-------
tools/perf/util/build-id.h | 3 +-
tools/perf/util/dso.c | 6 ++--
tools/perf/util/header.c | 3 +-
tools/perf/util/map.c | 4 +--
tools/perf/util/probe-event.c | 9 ++++--
tools/perf/util/probe-finder.c | 8 +++--
.../scripting-engines/trace-event-python.c | 2 +-
tools/perf/util/symbol.c | 2 +-
12 files changed, 43 insertions(+), 35 deletions(-)

diff --git a/tools/perf/builtin-buildid-cache.c b/tools/perf/builtin-buildid-cache.c
index c3cb168d546d..a25411926e48 100644
--- a/tools/perf/builtin-buildid-cache.c
+++ b/tools/perf/builtin-buildid-cache.c
@@ -186,7 +186,7 @@ static int build_id_cache__add_file(const char *filename, struct nsinfo *nsi)
return -1;
}

- build_id__sprintf(bid.data, sizeof(bid.data), sbuild_id);
+ build_id__sprintf(&bid, sbuild_id);
err = build_id_cache__add_s(sbuild_id, filename, nsi,
false, false);
pr_debug("Adding %s %s: %s\n", sbuild_id, filename,
@@ -210,7 +210,7 @@ static int build_id_cache__remove_file(const char *filename, struct nsinfo *nsi)
return -1;
}

- build_id__sprintf(bid.data, sizeof(bid.data), sbuild_id);
+ build_id__sprintf(&bid, sbuild_id);
err = build_id_cache__remove_s(sbuild_id);
pr_debug("Removing %s %s: %s\n", sbuild_id, filename,
err ? "FAIL" : "Ok");
@@ -314,7 +314,7 @@ static int build_id_cache__update_file(const char *filename, struct nsinfo *nsi)
}
err = 0;

- build_id__sprintf(bid.data, sizeof(bid.data), sbuild_id);
+ build_id__sprintf(&bid, sbuild_id);
if (build_id_cache__cached(sbuild_id))
err = build_id_cache__remove_s(sbuild_id);

diff --git a/tools/perf/tests/sdt.c b/tools/perf/tests/sdt.c
index 3ef37f739203..ed76c693f65e 100644
--- a/tools/perf/tests/sdt.c
+++ b/tools/perf/tests/sdt.c
@@ -37,7 +37,7 @@ static int build_id_cache__add_file(const char *filename)
return err;
}

- build_id__sprintf(bid.data, sizeof(bid.data), sbuild_id);
+ build_id__sprintf(&bid, 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);
diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index a016e1bd7b8d..6c8575e182ed 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -1578,8 +1578,7 @@ int symbol__strerror_disassemble(struct map_symbol *ms, int errnum, char *buf, s
char *build_id_msg = NULL;

if (dso->has_build_id) {
- build_id__sprintf(dso->bid.data,
- sizeof(dso->bid.data), bf + 15);
+ build_id__sprintf(&dso->bid, bf + 15);
build_id_msg = bf;
}
scnprintf(buf, buflen,
diff --git a/tools/perf/util/build-id.c b/tools/perf/util/build-id.c
index 1c332e78bbc3..b5648735f01f 100644
--- a/tools/perf/util/build-id.c
+++ b/tools/perf/util/build-id.c
@@ -37,6 +37,7 @@

#include <linux/ctype.h>
#include <linux/zalloc.h>
+#include <asm/bug.h>

static bool no_buildid_cache;

@@ -95,13 +96,13 @@ struct perf_tool build_id__mark_dso_hit_ops = {
.ordered_events = true,
};

-int build_id__sprintf(const u8 *build_id, int len, char *bf)
+int build_id__sprintf(const struct build_id *build_id, char *bf)
{
char *bid = bf;
- const u8 *raw = build_id;
- int i;
+ const u8 *raw = build_id->data;
+ size_t i;

- for (i = 0; i < len; ++i) {
+ for (i = 0; i < build_id->size; ++i) {
sprintf(bid, "%02x", *raw);
++raw;
bid += 2;
@@ -125,7 +126,7 @@ int sysfs__sprintf_build_id(const char *root_dir, char *sbuild_id)
if (ret < 0)
return ret;

- return build_id__sprintf(bid.data, sizeof(bid.data), sbuild_id);
+ return build_id__sprintf(&bid, sbuild_id);
}

int filename__sprintf_build_id(const char *pathname, char *sbuild_id)
@@ -137,7 +138,7 @@ int filename__sprintf_build_id(const char *pathname, char *sbuild_id)
if (ret < 0)
return ret;

- return build_id__sprintf(bid.data, sizeof(bid.data), sbuild_id);
+ return build_id__sprintf(&bid, sbuild_id);
}

/* asnprintf consolidates asprintf and snprintf */
@@ -270,7 +271,7 @@ char *dso__build_id_filename(const struct dso *dso, char *bf, size_t size,
if (!dso->has_build_id)
return NULL;

- build_id__sprintf(dso->bid.data, sizeof(dso->bid.data), sbuild_id);
+ build_id__sprintf(&dso->bid, sbuild_id);
linkname = build_id_cache__linkname(sbuild_id, NULL, 0);
if (!linkname)
return NULL;
@@ -767,13 +768,13 @@ int build_id_cache__add_s(const char *sbuild_id, const char *name,
return err;
}

-static int build_id_cache__add_b(const u8 *build_id, size_t build_id_size,
+static int build_id_cache__add_b(const struct build_id *bid,
const char *name, struct nsinfo *nsi,
bool is_kallsyms, bool is_vdso)
{
char sbuild_id[SBUILD_ID_SIZE];

- build_id__sprintf(build_id, build_id_size, sbuild_id);
+ build_id__sprintf(bid, sbuild_id);

return build_id_cache__add_s(sbuild_id, name, nsi, is_kallsyms,
is_vdso);
@@ -839,8 +840,8 @@ static int dso__cache_build_id(struct dso *dso, struct machine *machine)
is_kallsyms = true;
name = machine->mmap_name;
}
- return build_id_cache__add_b(dso->bid.data, sizeof(dso->bid.data), name,
- dso->nsinfo, is_kallsyms, is_vdso);
+ return build_id_cache__add_b(&dso->bid, name, dso->nsinfo,
+ is_kallsyms, is_vdso);
}

static int __dsos__cache_build_ids(struct list_head *head,
@@ -900,3 +901,10 @@ bool perf_session__read_build_ids(struct perf_session *session, bool with_hits)

return ret;
}
+
+void build_id__init(struct build_id *bid, const u8 *data, size_t size)
+{
+ WARN_ON(size > BUILD_ID_SIZE);
+ memcpy(bid->data, data, size);
+ bid->size = size;
+}
diff --git a/tools/perf/util/build-id.h b/tools/perf/util/build-id.h
index 5033e96d5c9d..f293f99d5dba 100644
--- a/tools/perf/util/build-id.h
+++ b/tools/perf/util/build-id.h
@@ -19,7 +19,8 @@ extern struct perf_tool build_id__mark_dso_hit_ops;
struct dso;
struct feat_fd;

-int build_id__sprintf(const u8 *build_id, int len, char *bf);
+void build_id__init(struct build_id *bid, const u8 *data, size_t size);
+int build_id__sprintf(const struct build_id *build_id, char *bf);
int sysfs__sprintf_build_id(const char *root_dir, char *sbuild_id);
int filename__sprintf_build_id(const char *pathname, char *sbuild_id);
char *build_id_cache__kallsyms_path(const char *sbuild_id, char *bf,
diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c
index e87fa9a71d9f..2f7f01ead9a1 100644
--- a/tools/perf/util/dso.c
+++ b/tools/perf/util/dso.c
@@ -172,9 +172,7 @@ int dso__read_binary_type_filename(const struct dso *dso,
break;
}

- build_id__sprintf(dso->bid.data,
- sizeof(dso->bid.data),
- build_id_hex);
+ build_id__sprintf(&dso->bid, build_id_hex);
len = __symbol__join_symfs(filename, size, "/usr/lib/debug/.build-id/");
snprintf(filename + len, size - len, "%.2s/%s.debug",
build_id_hex, build_id_hex + 2);
@@ -1374,7 +1372,7 @@ size_t dso__fprintf_buildid(struct dso *dso, FILE *fp)
{
char sbuild_id[SBUILD_ID_SIZE];

- build_id__sprintf(dso->bid.data, sizeof(dso->bid.data), sbuild_id);
+ build_id__sprintf(&dso->bid, sbuild_id);
return fprintf(fp, "%s", sbuild_id);
}

diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index cde8f6eba479..fe220f01fc94 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -2095,8 +2095,7 @@ static int __event_process_build_id(struct perf_record_header_build_id *bev,
free(m.name);
}

- build_id__sprintf(dso->bid.data, sizeof(dso->bid.data),
- sbuild_id);
+ build_id__sprintf(&dso->bid, sbuild_id);
pr_debug("build id event received for %s: %s\n",
dso->long_name, sbuild_id);
dso__put(dso);
diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c
index 522df3090b1c..f44ede437dc7 100644
--- a/tools/perf/util/map.c
+++ b/tools/perf/util/map.c
@@ -331,9 +331,7 @@ int map__load(struct map *map)
if (map->dso->has_build_id) {
char sbuild_id[SBUILD_ID_SIZE];

- build_id__sprintf(map->dso->bid.data,
- sizeof(map->dso->bid.data),
- sbuild_id);
+ build_id__sprintf(&map->dso->bid, sbuild_id);
pr_debug("%s with build id %s not found", name, sbuild_id);
} else
pr_debug("Failed to open %s", name);
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index 2041ad849851..8eae2afff71a 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -473,7 +473,7 @@ static struct debuginfo *open_from_debuginfod(struct dso *dso, struct nsinfo *ns
if (!c)
return NULL;

- build_id__sprintf(dso->bid.data, BUILD_ID_SIZE, sbuild_id);
+ build_id__sprintf(&dso->bid, sbuild_id);
fd = debuginfod_find_debuginfo(c, (const unsigned char *)sbuild_id,
0, &path);
if (fd >= 0)
@@ -1005,6 +1005,7 @@ static int _show_one_line(FILE *fp, int l, bool skip, bool show_num)
static int __show_line_range(struct line_range *lr, const char *module,
bool user)
{
+ struct build_id bid;
int l = 1;
struct int_node *ln;
struct debuginfo *dinfo;
@@ -1025,8 +1026,10 @@ static int __show_line_range(struct line_range *lr, const char *module,
if (!ret)
ret = debuginfo__find_line_range(dinfo, lr);
}
- if (dinfo->build_id)
- build_id__sprintf(dinfo->build_id, BUILD_ID_SIZE, sbuild_id);
+ if (dinfo->build_id) {
+ build_id__init(&bid, dinfo->build_id, BUILD_ID_SIZE);
+ build_id__sprintf(&bid, sbuild_id);
+ }
debuginfo__delete(dinfo);
if (ret == 0 || ret == -ENOENT) {
pr_warning("Specified source line is not found.\n");
diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c
index 6eddf7be8293..2c4061035f77 100644
--- a/tools/perf/util/probe-finder.c
+++ b/tools/perf/util/probe-finder.c
@@ -949,6 +949,7 @@ static int probe_point_lazy_walker(const char *fname, int lineno,
/* Find probe points from lazy pattern */
static int find_probe_point_lazy(Dwarf_Die *sp_die, struct probe_finder *pf)
{
+ struct build_id bid;
char sbuild_id[SBUILD_ID_SIZE] = "";
int ret = 0;
char *fpath;
@@ -957,9 +958,10 @@ static int find_probe_point_lazy(Dwarf_Die *sp_die, struct probe_finder *pf)
const char *comp_dir;

comp_dir = cu_get_comp_dir(&pf->cu_die);
- if (pf->dbg->build_id)
- build_id__sprintf(pf->dbg->build_id,
- BUILD_ID_SIZE, sbuild_id);
+ if (pf->dbg->build_id) {
+ build_id__init(&bid, pf->dbg->build_id, BUILD_ID_SIZE);
+ build_id__sprintf(&bid, sbuild_id);
+ }
ret = find_source_path(pf->fname, sbuild_id, comp_dir, &fpath);
if (ret < 0) {
pr_warning("Failed to find source file path.\n");
diff --git a/tools/perf/util/scripting-engines/trace-event-python.c b/tools/perf/util/scripting-engines/trace-event-python.c
index db3b1c275d8f..7cbd024e3e63 100644
--- a/tools/perf/util/scripting-engines/trace-event-python.c
+++ b/tools/perf/util/scripting-engines/trace-event-python.c
@@ -1064,7 +1064,7 @@ static int python_export_dso(struct db_export *dbe, struct dso *dso,
char sbuild_id[SBUILD_ID_SIZE];
PyObject *t;

- build_id__sprintf(dso->bid.data, sizeof(dso->bid.data), sbuild_id);
+ build_id__sprintf(&dso->bid, sbuild_id);

t = tuple_new(5);

diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index dd1cf91c62fb..369cbad09f0d 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -2152,7 +2152,7 @@ static char *dso__find_kallsyms(struct dso *dso, struct map *map)
goto proc_kallsyms;
}

- build_id__sprintf(dso->bid.data, sizeof(dso->bid.data), sbuild_id);
+ build_id__sprintf(&dso->bid, sbuild_id);

/* Find kallsyms in build-id cache with kcore */
scnprintf(path, sizeof(path), "%s/%s/%s",
--
2.26.2

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