[PATCH v2 12/18] perf annotate: Update use of pthread mutex

From: Ian Rogers
Date: Tue Aug 23 2022 - 18:12:07 EST

Switch to the use of mutex wrappers that provide better error checking.

Signed-off-by: Ian Rogers <irogers@xxxxxxxxxx>
---
tools/perf/builtin-top.c | 14 +++++++-------
tools/perf/ui/browsers/annotate.c | 10 +++++-----
tools/perf/util/annotate.c | 13 ++++++-------
tools/perf/util/annotate.h | 4 ++--
4 files changed, 20 insertions(+), 21 deletions(-)

diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 14e60f6f219c..b96bb9a23ac0 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -136,10 +136,10 @@ static int perf_top__parse_source(struct perf_top *top, struct hist_entry *he)
}

notes = symbol__annotation(sym);
- pthread_mutex_lock(&notes->lock);
+ mutex_lock(&notes->lock);

if (!symbol__hists(sym, top->evlist->core.nr_entries)) {
- pthread_mutex_unlock(&notes->lock);
+ mutex_unlock(&notes->lock);
pr_err("Not enough memory for annotating '%s' symbol!\n",
sym->name);
sleep(1);
@@ -155,7 +155,7 @@ static int perf_top__parse_source(struct perf_top *top, struct hist_entry *he)
pr_err("Couldn't annotate %s: %s\n", sym->name, msg);
}

- pthread_mutex_unlock(&notes->lock);
+ mutex_unlock(&notes->lock);
return err;
}

@@ -208,12 +208,12 @@ static void perf_top__record_precise_ip(struct perf_top *top,

notes = symbol__annotation(sym);

- if (pthread_mutex_trylock(&notes->lock))
+ if (!mutex_trylock(&notes->lock))
return;

err = hist_entry__inc_addr_samples(he, sample, evsel, ip);

- pthread_mutex_unlock(&notes->lock);
+ mutex_unlock(&notes->lock);

if (unlikely(err)) {
/*
@@ -250,7 +250,7 @@ static void perf_top__show_details(struct perf_top *top)
symbol = he->ms.sym;
notes = symbol__annotation(symbol);

- pthread_mutex_lock(&notes->lock);
+ mutex_lock(&notes->lock);

symbol__calc_percent(symbol, evsel);

@@ -271,7 +271,7 @@ static void perf_top__show_details(struct perf_top *top)
if (more != 0)
printf("%d lines not displayed, maybe increase display entries [e]\n", more);
out_unlock:
- pthread_mutex_unlock(&notes->lock);
+ mutex_unlock(&notes->lock);
}

static void perf_top__resort_hists(struct perf_top *t)
diff --git a/tools/perf/ui/browsers/annotate.c b/tools/perf/ui/browsers/annotate.c
index b8747e8dd9ea..9bc1076374ff 100644
--- a/tools/perf/ui/browsers/annotate.c
+++ b/tools/perf/ui/browsers/annotate.c
@@ -319,7 +319,7 @@ static void annotate_browser__calc_percent(struct annotate_browser *browser,

browser->entries = RB_ROOT;

- pthread_mutex_lock(&notes->lock);
+ mutex_lock(&notes->lock);

symbol__calc_percent(sym, evsel);

@@ -348,7 +348,7 @@ static void annotate_browser__calc_percent(struct annotate_browser *browser,
}
disasm_rb_tree__insert(browser, &pos->al);
}
- pthread_mutex_unlock(&notes->lock);
+ mutex_unlock(&notes->lock);

browser->curr_hot = rb_last(&browser->entries);
}
@@ -474,10 +474,10 @@ static bool annotate_browser__callq(struct annotate_browser *browser,
}

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

if (!symbol__hists(dl->ops.target.sym, evsel->evlist->core.nr_entries)) {
- pthread_mutex_unlock(&notes->lock);
+ mutex_unlock(&notes->lock);
ui__warning("Not enough memory for annotating '%s' symbol!\n",
dl->ops.target.sym->name);
return true;
@@ -486,7 +486,7 @@ static bool annotate_browser__callq(struct annotate_browser *browser,
target_ms.maps = ms->maps;
target_ms.map = ms->map;
target_ms.sym = dl->ops.target.sym;
- pthread_mutex_unlock(&notes->lock);
+ mutex_unlock(&notes->lock);
symbol__tui_annotate(&target_ms, evsel, hbt, browser->opts);
sym_title(ms->sym, ms->map, title, sizeof(title), browser->opts->percent_type);
ui_browser__show_title(&browser->b, title);
diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index 2c6a485c3de5..29d804d76145 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -35,7 +35,6 @@
#include "arch/common.h"
#include "namespaces.h"
#include <regex.h>
-#include <pthread.h>
#include <linux/bitops.h>
#include <linux/kernel.h>
#include <linux/string.h>
@@ -821,7 +820,7 @@ void symbol__annotate_zero_histograms(struct symbol *sym)
{
struct annotation *notes = symbol__annotation(sym);

- pthread_mutex_lock(&notes->lock);
+ mutex_lock(&notes->lock);
if (notes->src != NULL) {
memset(notes->src->histograms, 0,
notes->src->nr_histograms * notes->src->sizeof_sym_hist);
@@ -829,7 +828,7 @@ void symbol__annotate_zero_histograms(struct symbol *sym)
memset(notes->src->cycles_hist, 0,
symbol__size(sym) * sizeof(struct cyc_hist));
}
- pthread_mutex_unlock(&notes->lock);
+ mutex_unlock(&notes->lock);
}

static int __symbol__account_cycles(struct cyc_hist *ch,
@@ -1086,7 +1085,7 @@ void annotation__compute_ipc(struct annotation *notes, size_t size)
notes->hit_insn = 0;
notes->cover_insn = 0;

- pthread_mutex_lock(&notes->lock);
+ mutex_lock(&notes->lock);
for (offset = size - 1; offset >= 0; --offset) {
struct cyc_hist *ch;

@@ -1105,7 +1104,7 @@ void annotation__compute_ipc(struct annotation *notes, size_t size)
notes->have_cycles = true;
}
}
- pthread_mutex_unlock(&notes->lock);
+ mutex_unlock(&notes->lock);
}

int addr_map_symbol__inc_samples(struct addr_map_symbol *ams, struct perf_sample *sample,
@@ -1258,13 +1257,13 @@ int disasm_line__scnprintf(struct disasm_line *dl, char *bf, size_t size, bool r

void annotation__init(struct annotation *notes)
{
- pthread_mutex_init(&notes->lock, NULL);
+ mutex_init(&notes->lock, /*pshared=*/false);
}

void annotation__exit(struct annotation *notes)
{
annotated_source__delete(notes->src);
- pthread_mutex_destroy(&notes->lock);
+ mutex_destroy(&notes->lock);
}

static void annotation_line__add(struct annotation_line *al, struct list_head *head)
diff --git a/tools/perf/util/annotate.h b/tools/perf/util/annotate.h
index 986f2bbe4870..3cbd883e4d7a 100644
--- a/tools/perf/util/annotate.h
+++ b/tools/perf/util/annotate.h
@@ -8,9 +8,9 @@
#include <linux/types.h>
#include <linux/list.h>
#include <linux/rbtree.h>
-#include <pthread.h>
#include <asm/bug.h>
#include "symbol_conf.h"
+#include "mutex.h"
#include "spark.h"

struct hist_browser_timer;
@@ -273,7 +273,7 @@ struct annotated_source {
};

struct annotation {
- pthread_mutex_t lock;
+ struct mutex lock;
u64 max_coverage;
u64 start;
u64 hit_cycles;
--
2.37.2.609.g9ff673ca1a-goog