diff options
author | Adrian Hunter <adrian.hunter@intel.com> | 2013-12-03 09:23:07 +0200 |
---|---|---|
committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2013-12-04 13:46:36 -0300 |
commit | 454ff00f969e515c4cbfd52718ec5e01c7d9aeef (patch) | |
tree | f30a63eb6f61ea4a1b74e5af8ed7142fa6b65afd | |
parent | d88938ebc97df72320609b33aa0cf9a9a98accb1 (diff) |
perf symbols: Retain bfd reference to lookup source line numbers
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.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1386055390-13757-5-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
-rw-r--r-- | tools/perf/util/dso.c | 1 | ||||
-rw-r--r-- | tools/perf/util/dso.h | 3 | ||||
-rw-r--r-- | 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 af4c687cc49..68aa55aa5c1 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 9ac666abbe7..d8613dc3ca8 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 4c8e816a219..25b85b28301 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; } |