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| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2010-02-22 16:15:39 -0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-02-25 12:27:17 +0100 |
| commit | 3846df2e0a99a2bf10023de0e9c1496592012d4c (patch) | |
| tree | d418f91907e7491047905272357cfb73ace2011d /tools/perf/util/symbol.c | |
| parent | c7ad21af2c8b7accb893a576b100296c61c5d610 (diff) | |
| download | lwn-3846df2e0a99a2bf10023de0e9c1496592012d4c.tar.gz lwn-3846df2e0a99a2bf10023de0e9c1496592012d4c.zip | |
perf symbols: Improve debugging information about symtab origins
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 <acme@redhat.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1266866139-6361-1-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools/perf/util/symbol.c')
| -rw-r--r-- | tools/perf/util/symbol.c | 16 |
1 files changed, 14 insertions, 2 deletions
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: |