Closng and re-opening for every lookup when using
libbfd to lookup source file name and line number
is very very slow. Instead keep the reference on
struct dso.
Signed-off-by: Adrian Hunter <adrian.hun...@intel.com>
---
tools/perf/util/dso.c | 1 +
tools/perf/util/dso.h | 3 +++
tools/perf/util/srcline.c | 36 ++++++++++++++++++++++++++++++------
3 files changed, 34 insertions(+), 6 deletions(-)
diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c
index af4c687c..68aa55a 100644
--- a/tools/perf/util/dso.c
+++ b/tools/perf/util/dso.c
@@ -469,6 +469,7 @@ void dso__delete(struct dso *dso)
if (dso->lname_alloc)
free(dso->long_name);
dso_cache__free(&dso->cache);
+ dso__free_a2l(dso);
free(dso);
}
diff --git a/tools/perf/util/dso.h b/tools/perf/util/dso.h
index 9ac666a..d8613dc 100644
--- a/tools/perf/util/dso.h
+++ b/tools/perf/util/dso.h
@@ -77,6 +77,7 @@ struct dso {
struct rb_root symbols[MAP__NR_TYPES];
struct rb_root symbol_names[MAP__NR_TYPES];
struct rb_root cache;
+ void *a2l;
enum dso_kernel_type kernel;
enum dso_swap_type needs_swap;
enum dso_binary_type symtab_type;
@@ -166,4 +167,6 @@ static inline bool dso__is_kcore(struct dso *dso)
dso->data_type == DSO_BINARY_TYPE__GUEST_KCORE;
}
+void dso__free_a2l(struct dso *dso);
+
#endif /* __PERF_DSO */
diff --git a/tools/perf/util/srcline.c b/tools/perf/util/srcline.c
index 4c8e816..25b85b2 100644
--- a/tools/perf/util/srcline.c
+++ b/tools/perf/util/srcline.c
@@ -146,18 +146,24 @@ static void addr2line_cleanup(struct a2l_data *a2l)
}
static int addr2line(const char *dso_name, unsigned long addr,
- char **file, unsigned int *line)
+ char **file, unsigned int *line, struct dso *dso)
{
int ret = 0;
- struct a2l_data *a2l;
+ struct a2l_data *a2l = dso->a2l;
+
+ if (!a2l) {
+ dso->a2l = addr2line_init(dso_name);
+ a2l = dso->a2l;
+ }
- a2l = addr2line_init(dso_name);
if (a2l == NULL) {
pr_warning("addr2line_init failed for %s\n", dso_name);
return 0;
}
a2l->addr = addr;
+ a2l->found = false;
+
bfd_map_over_sections(a2l->abfd, find_address_in_section, a2l);
if (a2l->found && a2l->filename) {
@@ -168,14 +174,26 @@ static int addr2line(const char *dso_name, unsigned long
addr,
ret = 1;
}
- addr2line_cleanup(a2l);
return ret;
}
+void dso__free_a2l(struct dso *dso)
+{
+ struct a2l_data *a2l = dso->a2l;
+
+ if (!a2l)
+ return;
+
+ addr2line_cleanup(a2l);
+
+ dso->a2l = NULL;
+}
+
#else /* HAVE_LIBBFD_SUPPORT */
static int addr2line(const char *dso_name, unsigned long addr,
- char **file, unsigned int *line_nr)
+ char **file, unsigned int *line_nr,
+ struct dso *dso __maybe_unused)
{
FILE *fp;
char cmd[PATH_MAX];
@@ -219,6 +237,11 @@ out:
pclose(fp);
return ret;
}
+
+void dso__free_a2l(struct dso *dso __maybe_unused)
+{
+}
+
#endif /* HAVE_LIBBFD_SUPPORT */
char *get_srcline(struct dso *dso, unsigned long addr)
@@ -237,7 +260,7 @@ char *get_srcline(struct dso *dso, unsigned long addr)
if (!strncmp(dso_name, "/tmp/perf-", 10))
goto out;
- if (!addr2line(dso_name, addr, &file, &line))
+ if (!addr2line(dso_name, addr, &file, &line, dso))
goto out;
if (asprintf(&srcline, "%s:%u", file, line) < 0)
@@ -248,6 +271,7 @@ char *get_srcline(struct dso *dso, unsigned long addr)
out:
dso->has_srcline = 0;
+ dso__free_a2l(dso);
return SRCLINE_UNKNOWN;
}
--
1.7.11.7
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