From f048d548f803b57ee1dbf66702f398ba69657450 Mon Sep 17 00:00:00 2001 From: Namhyung Kim Date: Wed, 11 Sep 2013 14:09:28 +0900 Subject: [PATCH] perf annotate: Factor out get/free_srcline() Currently external addr2line tool is used for srcline sort key and annotate with srcline info. Separate the common code to prepare upcoming enhancements. Signed-off-by: Namhyung Kim Reviewed-by: Jiri Olsa Cc: Ingo Molnar Cc: Jiri Olsa Cc: Paul Mackerras Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/1378876173-13363-5-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/Makefile.perf | 1 + tools/perf/util/annotate.c | 20 ++--------- tools/perf/util/hist.c | 2 +- tools/perf/util/sort.c | 17 ++-------- tools/perf/util/srcline.c | 83 ++++++++++++++++++++++++++++++++++++++++++++++ tools/perf/util/util.h | 5 +++ 6 files changed, 96 insertions(+), 32 deletions(-) create mode 100644 tools/perf/util/srcline.c diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf index 40c39c3..1f13615 100644 --- a/tools/perf/Makefile.perf +++ b/tools/perf/Makefile.perf @@ -363,6 +363,7 @@ LIB_OBJS += $(OUTPUT)util/intlist.o LIB_OBJS += $(OUTPUT)util/vdso.o LIB_OBJS += $(OUTPUT)util/stat.o LIB_OBJS += $(OUTPUT)util/record.o +LIB_OBJS += $(OUTPUT)util/srcline.o LIB_OBJS += $(OUTPUT)ui/setup.o LIB_OBJS += $(OUTPUT)ui/helpline.o diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c index c6fd187..d48297d 100644 --- a/tools/perf/util/annotate.c +++ b/tools/perf/util/annotate.c @@ -1070,7 +1070,7 @@ static void symbol__free_source_line(struct symbol *sym, int len) (sizeof(src_line->p) * (src_line->nr_pcnt - 1)); for (i = 0; i < len; i++) { - free(src_line->path); + free_srcline(src_line->path); src_line = (void *)src_line + sizeof_src_line; } @@ -1087,7 +1087,6 @@ static int symbol__get_source_line(struct symbol *sym, struct map *map, u64 start; int i, k; int evidx = evsel->idx; - char cmd[PATH_MAX * 2]; struct source_line *src_line; struct annotation *notes = symbol__annotation(sym); struct sym_hist *h = annotation__histogram(notes, evidx); @@ -1115,10 +1114,7 @@ static int symbol__get_source_line(struct symbol *sym, struct map *map, start = map__rip_2objdump(map, sym->start); for (i = 0; i < len; i++) { - char *path = NULL; - size_t line_len; u64 offset; - FILE *fp; double percent_max = 0.0; src_line->nr_pcnt = nr_pcnt; @@ -1135,19 +1131,9 @@ static int symbol__get_source_line(struct symbol *sym, struct map *map, goto next; offset = start + i; - sprintf(cmd, "addr2line -e %s %016" PRIx64, filename, offset); - fp = popen(cmd, "r"); - if (!fp) - goto next; - - if (getline(&path, &line_len, fp) < 0 || !line_len) - goto next_close; - - src_line->path = path; + src_line->path = get_srcline(filename, offset); insert_source_line(&tmp_root, src_line); - next_close: - pclose(fp); next: src_line = (void *)src_line + sizeof_src_line; } @@ -1188,7 +1174,7 @@ static void print_summary(struct rb_root *root, const char *filename) path = src_line->path; color = get_percent_color(percent_max); - color_fprintf(stdout, color, " %s", path); + color_fprintf(stdout, color, " %s\n", path); node = rb_next(node); } diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c index e6fc38a..cca03831 100644 --- a/tools/perf/util/hist.c +++ b/tools/perf/util/hist.c @@ -535,7 +535,7 @@ void hist_entry__free(struct hist_entry *he) { free(he->branch_info); free(he->mem_info); - free(he->srcline); + free_srcline(he->srcline); free(he); } diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c index 97cf3ef..b7e0ef0 100644 --- a/tools/perf/util/sort.c +++ b/tools/perf/util/sort.c @@ -251,8 +251,7 @@ static int hist_entry__srcline_snprintf(struct hist_entry *self, char *bf, unsigned int width __maybe_unused) { FILE *fp = NULL; - char cmd[PATH_MAX + 2], *path = self->srcline, *nl; - size_t line_len; + char *path = self->srcline; if (path != NULL) goto out_path; @@ -263,19 +262,9 @@ static int hist_entry__srcline_snprintf(struct hist_entry *self, char *bf, if (!strncmp(self->ms.map->dso->long_name, "/tmp/perf-", 10)) goto out_ip; - snprintf(cmd, sizeof(cmd), "addr2line -e %s %016" PRIx64, - self->ms.map->dso->long_name, self->ip); - fp = popen(cmd, "r"); - if (!fp) - goto out_ip; - - if (getline(&self->srcline, &line_len, fp) < 0 || !line_len) - goto out_ip; + path = get_srcline(self->ms.map->dso->long_name, self->ip); + self->srcline = path; - nl = strchr(self->srcline, '\n'); - if (nl != NULL) - *nl = '\0'; - path = self->srcline; out_path: if (fp) pclose(fp); diff --git a/tools/perf/util/srcline.c b/tools/perf/util/srcline.c new file mode 100644 index 0000000..7e92cca --- /dev/null +++ b/tools/perf/util/srcline.c @@ -0,0 +1,83 @@ +#include +#include +#include + +#include + +#include "util/util.h" +#include "util/debug.h" + +static int addr2line(const char *dso_name, unsigned long addr, + char **file, unsigned int *line_nr) +{ + FILE *fp; + char cmd[PATH_MAX]; + char *filename = NULL; + size_t len; + char *sep; + int ret = 0; + + scnprintf(cmd, sizeof(cmd), "addr2line -e %s %016"PRIx64, + dso_name, addr); + + fp = popen(cmd, "r"); + if (fp == NULL) { + pr_warning("popen failed for %s\n", dso_name); + return 0; + } + + if (getline(&filename, &len, fp) < 0 || !len) { + pr_warning("addr2line has no output for %s\n", dso_name); + goto out; + } + + sep = strchr(filename, '\n'); + if (sep) + *sep = '\0'; + + if (!strcmp(filename, "??:0")) { + pr_debug("no debugging info in %s\n", dso_name); + free(filename); + goto out; + } + + sep = strchr(filename, ':'); + if (sep) { + *sep++ = '\0'; + *file = filename; + *line_nr = strtoul(sep, NULL, 0); + ret = 1; + } +out: + pclose(fp); + return ret; +} + +char *get_srcline(const char *dso_name, unsigned long addr) +{ + char *file; + unsigned line; + char *srcline; + size_t size; + + if (!addr2line(dso_name, addr, &file, &line)) + return SRCLINE_UNKNOWN; + + /* just calculate actual length */ + size = snprintf(NULL, 0, "%s:%u", file, line) + 1; + + srcline = malloc(size); + if (srcline) + snprintf(srcline, size, "%s:%u", file, line); + else + srcline = SRCLINE_UNKNOWN; + + free(file); + return srcline; +} + +void free_srcline(char *srcline) +{ + if (srcline && strcmp(srcline, SRCLINE_UNKNOWN) != 0) + free(srcline); +} diff --git a/tools/perf/util/util.h b/tools/perf/util/util.h index 7fd840b..7c8b43f 100644 --- a/tools/perf/util/util.h +++ b/tools/perf/util/util.h @@ -297,4 +297,9 @@ struct parse_tag { }; unsigned long parse_tag_value(const char *str, struct parse_tag *tags); + +#define SRCLINE_UNKNOWN ((char *) "??:0") + +char *get_srcline(const char *dso_name, unsigned long addr); +void free_srcline(char *srcline); #endif /* GIT_COMPAT_UTIL_H */ -- 2.7.4