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>
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@ -103,7 +103,8 @@ static int perf_top__parse_source(struct perf_top *top, struct hist_entry *he)
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/*
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* We can't annotate with just /proc/kallsyms
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*/
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if (map->dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS) {
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if (map->dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS &&
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!dso__is_kcore(map->dso)) {
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pr_err("Can't annotate %s: No vmlinux file was found in the "
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"path\n", sym->name);
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sleep(1);
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@ -110,10 +110,10 @@ static int jump__parse(struct ins_operands *ops)
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{
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const char *s = strchr(ops->raw, '+');
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ops->target.addr = strtoll(ops->raw, NULL, 16);
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ops->target.addr = strtoull(ops->raw, NULL, 16);
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if (s++ != NULL)
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ops->target.offset = strtoll(s, NULL, 16);
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ops->target.offset = strtoull(s, NULL, 16);
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else
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ops->target.offset = UINT64_MAX;
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@ -821,6 +821,10 @@ static int symbol__parse_objdump_line(struct symbol *sym, struct map *map,
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if (dl == NULL)
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return -1;
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if (dl->ops.target.offset == UINT64_MAX)
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dl->ops.target.offset = dl->ops.target.addr -
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map__rip_2objdump(map, sym->start);
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disasm__add(¬es->src->source, dl);
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return 0;
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@ -864,7 +868,8 @@ fallback:
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free_filename = false;
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}
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if (dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS) {
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if (dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS &&
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!dso__is_kcore(dso)) {
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char bf[BUILD_ID_SIZE * 2 + 16] = " with build id ";
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char *build_id_msg = NULL;
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@ -898,7 +903,7 @@ fallback:
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snprintf(command, sizeof(command),
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"%s %s%s --start-address=0x%016" PRIx64
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" --stop-address=0x%016" PRIx64
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" -d %s %s -C %s|grep -v %s|expand",
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" -d %s %s -C %s 2>/dev/null|grep -v %s|expand",
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objdump_path ? objdump_path : "objdump",
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disassembler_style ? "-M " : "",
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disassembler_style ? disassembler_style : "",
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