From 3846df2e0a99a2bf10023de0e9c1496592012d4c Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Mon, 22 Feb 2010 16:15:39 -0300 Subject: [PATCH] perf symbols: Improve debugging information about symtab origins MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Be more clear about DSO long names and tell from which file kernel symbols were obtained, all in --verbose mode: [root@mica ~]# perf report -v > /dev/null Looking at the vmlinux_path (5 entries long) Using /lib/modules/2.6.33-rc8-tip-00777-g0918527-dirty/build/vmlinux for symbols [root@mica ~]# mv /lib/modules/2.6.33-rc8-tip-00777-g0918527-dirty/build/vmlinux /tmp/dd [root@mica ~]# perf report -v > /dev/null Looking at the vmlinux_path (5 entries long) Using /proc/kallsyms for symbols [root@mica ~]# Signed-off-by: Arnaldo Carvalho de Melo Cc: Frédéric Weisbecker Cc: Mike Galbraith Cc: Peter Zijlstra Cc: Paul Mackerras LKML-Reference: <1266866139-6361-1-git-send-email-acme@infradead.org> Signed-off-by: Ingo Molnar --- tools/perf/util/map.c | 5 +++++ tools/perf/util/map.h | 2 ++ tools/perf/util/symbol.c | 16 ++++++++++++++-- tools/perf/util/thread.c | 5 ----- 4 files changed, 21 insertions(+), 7 deletions(-) diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c index 138e3cb2b727..e509cd59c67d 100644 --- a/tools/perf/util/map.c +++ b/tools/perf/util/map.c @@ -5,6 +5,11 @@ #include #include "debug.h" +const char *map_type__name[MAP__NR_TYPES] = { + [MAP__FUNCTION] = "Functions", + [MAP__VARIABLE] = "Variables", +}; + static inline int is_anon_memory(const char *filename) { return strcmp(filename, "//anon") == 0; diff --git a/tools/perf/util/map.h b/tools/perf/util/map.h index 86f77cb1d060..b756368076c6 100644 --- a/tools/perf/util/map.h +++ b/tools/perf/util/map.h @@ -13,6 +13,8 @@ enum map_type { #define MAP__NR_TYPES (MAP__VARIABLE + 1) +extern const char *map_type__name[MAP__NR_TYPES]; + struct dso; struct ref_reloc_sym; struct map_groups; diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c index 320b15178e95..7aab4e5f3669 100644 --- a/tools/perf/util/symbol.c +++ b/tools/perf/util/symbol.c @@ -367,6 +367,10 @@ size_t dso__fprintf(struct dso *self, enum map_type type, FILE *fp) struct rb_node *nd; size_t ret = fprintf(fp, "dso: %s (", self->short_name); + if (self->short_name != self->long_name) + ret += fprintf(fp, "%s, ", self->long_name); + ret += fprintf(fp, "%s, %sloaded, ", map_type__name[type], + self->loaded ? "" : "NOT "); ret += dso__fprintf_buildid(self, fp); ret += fprintf(fp, ")\n"); for (nd = rb_first(&self->symbols[type]); nd; nd = rb_next(nd)) { @@ -1580,6 +1584,9 @@ static int dso__load_vmlinux(struct dso *self, struct map *map, err = dso__load_sym(self, map, vmlinux, fd, filter, 0); close(fd); + if (err > 0) + pr_debug("Using %s for symbols\n", vmlinux); + return err; } @@ -1594,7 +1601,6 @@ int dso__load_vmlinux_path(struct dso *self, struct map *map, for (i = 0; i < vmlinux_path__nr_entries; ++i) { err = dso__load_vmlinux(self, map, vmlinux_path[i], filter); if (err > 0) { - pr_debug("Using %s for symbols\n", vmlinux_path[i]); dso__set_long_name(self, strdup(vmlinux_path[i])); break; } @@ -1661,12 +1667,16 @@ static int dso__load_kernel_sym(struct dso *self, struct map *map, if (asprintf(&kallsyms_allocated_filename, "%s/.debug/[kernel.kallsyms]/%s", - getenv("HOME"), sbuild_id) == -1) + getenv("HOME"), sbuild_id) == -1) { + pr_err("Not enough memory for kallsyms file lookup\n"); return -1; + } kallsyms_filename = kallsyms_allocated_filename; if (access(kallsyms_filename, F_OK)) { + pr_err("No kallsyms or vmlinux with build-id %s " + "was found\n", sbuild_id); free(kallsyms_allocated_filename); return -1; } @@ -1680,6 +1690,8 @@ static int dso__load_kernel_sym(struct dso *self, struct map *map, do_kallsyms: err = dso__load_kallsyms(self, kallsyms_filename, map, filter); + if (err > 0) + pr_debug("Using %s for symbols\n", kallsyms_filename); free(kallsyms_allocated_filename); out_try_fixup: diff --git a/tools/perf/util/thread.c b/tools/perf/util/thread.c index 9e8995eaf2b6..c090654cb6c0 100644 --- a/tools/perf/util/thread.c +++ b/tools/perf/util/thread.c @@ -53,11 +53,6 @@ int thread__comm_len(struct thread *self) return self->comm_len; } -static const char *map_type__name[MAP__NR_TYPES] = { - [MAP__FUNCTION] = "Functions", - [MAP__VARIABLE] = "Variables", -}; - static size_t __map_groups__fprintf_maps(struct map_groups *self, enum map_type type, FILE *fp) {