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perf dso: Add dso__filename_with_chroot() to reduce number of accesses to dso->nsinfo members

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We'll need to reference count dso->nsinfo, so reduce the number of
direct accesses by having a shorter form of obtaining a filename with
a chroot (namespace one).

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexey Bayduraev <alexey.v.bayduraev@linux.intel.com>
Cc: Dmitriy Vyukov <dvyukov@google.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Riccardo Mancini <rickyman7@gmail.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Stephen Brennan <stephen.s.brennan@oracle.com>
Link: https://lore.kernel.org/lkml/ZD26ZlqSbgSyH5lX@kernel.org
[ Used nsinfo__pid(dso->nsinfo), as it was already present ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2023-04-17 18:28:01 -03:00
parent da885a0e5e
commit 7031edac9d
6 changed files with 12 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

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

@ -630,10 +630,8 @@ static int dso__read_build_id(struct dso *dso)
if (filename__read_build_id(dso->long_name, &dso->bid) > 0)
dso->has_build_id = true;
else if (dso->nsinfo) {
char *new_name;
char *new_name = dso__filename_with_chroot(dso, dso->long_name);
new_name = filename_with_chroot(dso->nsinfo->pid,
dso->long_name);
if (new_name && filename__read_build_id(new_name, &dso->bid) > 0)
dso->has_build_id = true;
free(new_name);

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

@ -1692,8 +1692,7 @@ static int dso__disassemble_filename(struct dso *dso, char *filename, size_t fil
mutex_lock(&dso->lock);
if (access(filename, R_OK) && errno == ENOENT && dso->nsinfo) {
char *new_name = filename_with_chroot(dso->nsinfo->pid,
filename);
char *new_name = dso__filename_with_chroot(dso, filename);
if (new_name) {
strlcpy(filename, new_name, filename_size);
free(new_name);

7
tools/perf/util/dso.c
View File

@ -491,6 +491,11 @@ static int do_open(char *name)
return -1;
}
char *dso__filename_with_chroot(const struct dso *dso, const char *filename)
{
return filename_with_chroot(nsinfo__pid(dso->nsinfo), filename);
}
static int __open_dso(struct dso *dso, struct machine *machine)
{
int fd = -EINVAL;
@ -515,7 +520,7 @@ static int __open_dso(struct dso *dso, struct machine *machine)
if (errno != ENOENT || dso->nsinfo == NULL)
goto out;
new_name = filename_with_chroot(dso->nsinfo->pid, name);
new_name = dso__filename_with_chroot(dso, name);
if (!new_name)
goto out;

2
tools/perf/util/dso.h
View File

@ -266,6 +266,8 @@ static inline bool dso__has_symbols(const struct dso *dso)
return !RB_EMPTY_ROOT(&dso->symbols.rb_root);
}
char *dso__filename_with_chroot(const struct dso *dso, const char *filename);
bool dso__sorted_by_name(const struct dso *dso);
void dso__set_sorted_by_name(struct dso *dso);
void dso__sort_by_name(struct dso *dso);

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

@ -91,8 +91,7 @@ bool __dsos__read_build_ids(struct list_head *head, bool with_hits)
have_build_id = true;
pos->has_build_id = true;
} else if (errno == ENOENT && pos->nsinfo) {
char *new_name = filename_with_chroot(pos->nsinfo->pid,
pos->long_name);
char *new_name = dso__filename_with_chroot(pos, pos->long_name);
if (new_name && filename__read_build_id(new_name,
&pos->bid) > 0) {

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

@ -1963,8 +1963,7 @@ int dso__load(struct dso *dso, struct map *map)
is_reg = is_regular_file(name);
if (!is_reg && errno == ENOENT && dso->nsinfo) {
char *new_name = filename_with_chroot(dso->nsinfo->pid,
name);
char *new_name = dso__filename_with_chroot(dso, name);
if (new_name) {
is_reg = is_regular_file(new_name);
strlcpy(name, new_name, PATH_MAX);