diff options
| author | Adrian Hunter <adrian.hunter@intel.com> | 2013-08-07 15:38:54 +0400 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2013-08-08 00:35:34 +0400 |
| commit | bbb7f846f88df05646795854a014d73fb00f3b8b (patch) | |
| tree | 0c2639ffe7ba44990eec597fe18448ca9a747b97 /tools | |
| parent | 7a77bc2c0d2726a7fc9e6b91b36f984c3e377008 (diff) | |
| download | linux-bbb7f846f88df05646795854a014d73fb00f3b8b.tar.xz | |
perf annotate: Allow disassembly using /proc/kcore
Annotation with /proc/kcore is possible so the logic is adjusted to
allow it. The main difference is that /proc/kcore had no symbols so the
parsing logic needed a tweak to read jump offsets.
The other difference is that objdump cannot always read from kcore.
That seems to be a bug with objdump.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
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 <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1375875537-4509-11-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/builtin-top.c | 3 | ||||
| -rw-r--r-- | tools/perf/util/annotate.c | 13 |
2 files changed, 11 insertions, 5 deletions
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c index 9101f7cf2587..440c3b371401 100644 --- a/tools/perf/builtin-top.c +++ b/tools/perf/builtin-top.c @@ -103,7 +103,8 @@ static int perf_top__parse_source(struct perf_top *top, struct hist_entry *he) /* * We can't annotate with just /proc/kallsyms */ - if (map->dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS) { + if (map->dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS && + !dso__is_kcore(map->dso)) { pr_err("Can't annotate %s: No vmlinux file was found in the " "path\n", sym->name); sleep(1); diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c index d102716c43a1..4ab2f11ee6f4 100644 --- a/tools/perf/util/annotate.c +++ b/tools/perf/util/annotate.c @@ -110,10 +110,10 @@ static int jump__parse(struct ins_operands *ops) { const char *s = strchr(ops->raw, '+'); - ops->target.addr = strtoll(ops->raw, NULL, 16); + ops->target.addr = strtoull(ops->raw, NULL, 16); if (s++ != NULL) - ops->target.offset = strtoll(s, NULL, 16); + ops->target.offset = strtoull(s, NULL, 16); else ops->target.offset = UINT64_MAX; @@ -821,6 +821,10 @@ static int symbol__parse_objdump_line(struct symbol *sym, struct map *map, if (dl == NULL) return -1; + if (dl->ops.target.offset == UINT64_MAX) + dl->ops.target.offset = dl->ops.target.addr - + map__rip_2objdump(map, sym->start); + disasm__add(¬es->src->source, dl); return 0; @@ -864,7 +868,8 @@ fallback: free_filename = false; } - if (dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS) { + if (dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS && + !dso__is_kcore(dso)) { char bf[BUILD_ID_SIZE * 2 + 16] = " with build id "; char *build_id_msg = NULL; @@ -898,7 +903,7 @@ fallback: snprintf(command, sizeof(command), "%s %s%s --start-address=0x%016" PRIx64 " --stop-address=0x%016" PRIx64 - " -d %s %s -C %s|grep -v %s|expand", + " -d %s %s -C %s 2>/dev/null|grep -v %s|expand", objdump_path ? objdump_path : "objdump", disassembler_style ? "-M " : "", disassembler_style ? disassembler_style : "", |