[PATCH 13/28] perf annotate: Find 'call' instruction target symbol at parsing time

Arnaldo Carvalho de Melo
2018-03-05T14:35:24Z

From: Arnaldo Carvalho de Melo <acme@redhat.com>

So that we do it just once, not everytime we press enter or -> on a
'call' instruction line.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-uysyojl1e6nm94amzzzs08tf@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/ui/browsers/annotate.c | 17 +++++------------
tools/perf/util/annotate.c | 38 +++++++++++++++++++++-----------------
tools/perf/util/annotate.h | 1 +
3 files changed, 27 insertions(+), 29 deletions(-)

diff --git a/tools/perf/ui/browsers/annotate.c b/tools/perf/ui/browsers/annotate.c
index 6ff6839558b0..618edf96353c 100644
--- a/tools/perf/ui/browsers/annotate.c
+++ b/tools/perf/ui/browsers/annotate.c
@@ -568,35 +568,28 @@ static bool annotate_browser__callq(struct annotate_browser *browser,
struct map_symbol *ms = browser->b.priv;
struct disasm_line *dl = disasm_line(browser->selection);
struct annotation *notes;
- struct addr_map_symbol target = {
- .map = ms->map,
- .addr = map__objdump_2mem(ms->map, dl->ops.target.addr),
- };
char title[SYM_TITLE_MAX_SIZE];

if (!ins__is_call(&dl->ins))
return false;

- if (map_groups__find_ams(&target) ||
- map__rip_2objdump(target.map, target.map->map_ip(target.map,
- target.addr)) !=
- dl->ops.target.addr) {
+ if (!dl->ops.target.sym) {
ui_helpline__puts("The called function was not found.");
return true;
}

- notes = symbol__annotation(target.sym);
+ notes = symbol__annotation(dl->ops.target.sym);
pthread_mutex_lock(&notes->lock);

- if (notes->src == NULL && symbol__alloc_hist(target.sym) < 0) {
+ if (notes->src == NULL && symbol__alloc_hist(dl->ops.target.sym) < 0) {
pthread_mutex_unlock(&notes->lock);
ui__warning("Not enough memory for annotating '%s' symbol!\n",
- target.sym->name);
+ dl->ops.target.sym->name);
return true;
}

pthread_mutex_unlock(&notes->lock);
- symbol__tui_annotate(target.sym, target.map, evsel, hbt);
+ symbol__tui_annotate(dl->ops.target.sym, ms->map, evsel, hbt);
sym_title(ms->sym, ms->map, title, sizeof(title));
ui_browser__show_title(&browser->b, title);
return true;
diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index 28b233c3dcbe..49ff825f745c 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -187,6 +187,9 @@ bool ins__is_fused(struct arch *arch, const char *ins1, const char *ins2)
static int call__parse(struct arch *arch, struct ins_operands *ops, struct map *map)
{
char *endptr, *tok, *name;
+ struct addr_map_symbol target = {
+ .map = map,
+ };

ops->target.addr = strtoull(ops->raw, &endptr, 16);

@@ -208,28 +211,29 @@ static int call__parse(struct arch *arch, struct ins_operands *ops, struct map *
ops->target.name = strdup(name);
*tok = '>';

- return ops->target.name == NULL ? -1 : 0;
+ if (ops->target.name == NULL)
+ return -1;
+find_target:
+ target.addr = map__objdump_2mem(map, ops->target.addr);

-indirect_call:
- tok = strchr(endptr, '*');
- if (tok == NULL) {
- struct symbol *sym = map__find_symbol(map, map->map_ip(map, ops->target.addr));
- if (sym != NULL)
- ops->target.name = strdup(sym->name);
- else
- ops->target.addr = 0;
- return 0;
- }
+ if (map_groups__find_ams(&target) == 0 &&
+ map__rip_2objdump(target.map, map->map_ip(target.map, target.addr)) == ops->target.addr)
+ ops->target.sym = target.sym;

- ops->target.addr = strtoull(tok + 1, NULL, 16);
return 0;
+
+indirect_call:
+ tok = strchr(endptr, '*');
+ if (tok != NULL)
+ ops->target.addr = strtoull(tok + 1, NULL, 16);
+ goto find_target;
}

static int call__scnprintf(struct ins *ins, char *bf, size_t size,
struct ins_operands *ops)
{
- if (ops->target.name)
- return scnprintf(bf, size, "%-6s %s", ins->name, ops->target.name);
+ if (ops->target.sym)
+ return scnprintf(bf, size, "%-6s %s", ins->name, ops->target.sym->name);

if (ops->target.addr == 0)
return ins__raw_scnprintf(ins, bf, size, ops);
@@ -1283,8 +1287,8 @@ static int symbol__parse_objdump_line(struct symbol *sym, FILE *file,
dl->ops.target.offset_avail = true;
}

- /* kcore has no symbols, so add the call target name */
- if (dl->ins.ops && ins__is_call(&dl->ins) && !dl->ops.target.name) {
+ /* kcore has no symbols, so add the call target symbol */
+ if (dl->ins.ops && ins__is_call(&dl->ins) && !dl->ops.target.sym) {
struct addr_map_symbol target = {
.map = map,
.addr = dl->ops.target.addr,
@@ -1292,7 +1296,7 @@ static int symbol__parse_objdump_line(struct symbol *sym, FILE *file,

if (!map_groups__find_ams(&target) &&
target.sym->start == target.al_addr)
- dl->ops.target.name = strdup(target.sym->name);
+ dl->ops.target.sym = target.sym;
}

annotation_line__add(&dl->al, &notes->src->source);
diff --git a/tools/perf/util/annotate.h b/tools/perf/util/annotate.h
index ce427445671f..7e914e834101 100644
--- a/tools/perf/util/annotate.h
+++ b/tools/perf/util/annotate.h
@@ -24,6 +24,7 @@ struct ins_operands {
struct {
char *raw;
char *name;
+ struct symbol *sym;
u64 addr;
s64 offset;
bool offset_avail;
--
2.14.3