Commit-ID: 454ff00f969e515c4cbfd52718ec5e01c7d9aeef Gitweb: http://git.kernel.org/tip/454ff00f969e515c4cbfd52718ec5e01c7d9aeef Author: Adrian Hunter <adrian.hun...@intel.com> AuthorDate: Tue, 3 Dec 2013 09:23:07 +0200 Committer: Arnaldo Carvalho de Melo <a...@redhat.com> CommitDate: Wed, 4 Dec 2013 13:46:36 -0300
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.hun...@intel.com> Cc: Andi Kleen <a...@linux.intel.com> Cc: David Ahern <dsah...@gmail.com> Cc: Frederic Weisbecker <fweis...@gmail.com> Cc: Ingo Molnar <mi...@redhat.com> Cc: Jiri Olsa <jo...@redhat.com> Cc: Mike Galbraith <efa...@gmx.de> Cc: Namhyung Kim <namhy...@gmail.com> Cc: Paul Mackerras <pau...@samba.org> Cc: Peter Zijlstra <a.p.zijls...@chello.nl> Cc: Stephane Eranian <eran...@google.com> Link: http://lkml.kernel.org/r/1386055390-13757-5-git-send-email-adrian.hun...@intel.com Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.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; } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
