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Message-Id: <20241108184751.359237-5-irogers@google.com>
Date: Fri, 8 Nov 2024 10:47:49 -0800
From: Ian Rogers <irogers@...gle.com>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>,
Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>,
Ian Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>,
Kan Liang <kan.liang@...ux.intel.com>, Athira Jajeev <atrajeev@...ux.vnet.ibm.com>,
James Clark <james.clark@...aro.org>, Dominique Martinet <asmadeus@...ewreck.org>,
Yang Li <yang.lee@...ux.alibaba.com>, Colin Ian King <colin.i.king@...il.com>,
Yang Jihong <yangjihong@...edance.com>, "Steinar H. Gunderson" <sesse@...gle.com>,
Oliver Upton <oliver.upton@...ux.dev>, Ilkka Koskinen <ilkka@...amperecomputing.com>,
Ze Gao <zegao2021@...il.com>, Weilin Wang <weilin.wang@...el.com>,
Ben Gainey <ben.gainey@....com>, zhaimingbing <zhaimingbing@...s.chinamobile.com>,
Zixian Cai <fzczx123@...il.com>, Andi Kleen <ak@...ux.intel.com>, Paran Lee <p4ranlee@...il.com>,
Thomas Falcon <thomas.falcon@...el.com>, linux-kernel@...r.kernel.org,
linux-perf-users@...r.kernel.org,
"Steven Rostedt (Google)" <rostedt@...dmis.org>
Subject: [PATCH v4 4/6] perf evsel: Add/use accessor for tp_format
Add an accessor function for tp_format. Rather than search+replace
uses try to use a variable and reuse it. Add additional NULL checks
when accessing/using the value. Make sure the PTR_ERR is nulled out on
error path in evsel__newtp_idx.
Signed-off-by: Ian Rogers <irogers@...gle.com>
---
tools/perf/builtin-kmem.c | 12 +--
tools/perf/builtin-kwork.c | 3 +-
tools/perf/builtin-script.c | 9 ++-
tools/perf/builtin-trace.c | 79 +++++++++++++------
tools/perf/util/data-convert-bt.c | 10 ++-
tools/perf/util/data-convert-json.c | 8 +-
tools/perf/util/evsel.c | 9 ++-
tools/perf/util/evsel.h | 5 ++
tools/perf/util/evsel_fprintf.c | 4 +-
.../util/scripting-engines/trace-event-perl.c | 3 +-
.../scripting-engines/trace-event-python.c | 3 +-
tools/perf/util/sort.c | 33 +++++---
tools/perf/util/trace-event-scripting.c | 10 ++-
13 files changed, 128 insertions(+), 60 deletions(-)
diff --git a/tools/perf/builtin-kmem.c b/tools/perf/builtin-kmem.c
index a756147e2eec..0ffbb0681fd9 100644
--- a/tools/perf/builtin-kmem.c
+++ b/tools/perf/builtin-kmem.c
@@ -761,6 +761,7 @@ static int parse_gfp_flags(struct evsel *evsel, struct perf_sample *sample,
};
struct trace_seq seq;
char *str, *pos = NULL;
+ const struct tep_event *tp_format;
if (nr_gfps) {
struct gfp_flag key = {
@@ -772,8 +773,9 @@ static int parse_gfp_flags(struct evsel *evsel, struct perf_sample *sample,
}
trace_seq_init(&seq);
- tep_print_event(evsel->tp_format->tep,
- &seq, &record, "%s", TEP_PRINT_INFO);
+ tp_format = evsel__tp_format(evsel);
+ if (tp_format)
+ tep_print_event(tp_format->tep, &seq, &record, "%s", TEP_PRINT_INFO);
str = strtok_r(seq.buffer, " ", &pos);
while (str) {
@@ -2012,13 +2014,13 @@ int cmd_kmem(int argc, const char **argv)
if (kmem_page) {
struct evsel *evsel = evlist__find_tracepoint_by_name(session->evlist, "kmem:mm_page_alloc");
+ const struct tep_event *tp_format = evsel ? evsel__tp_format(evsel) : NULL;
- if (evsel == NULL) {
+ if (tp_format == NULL) {
pr_err(errmsg, "page", "page");
goto out_delete;
}
-
- kmem_page_size = tep_get_page_size(evsel->tp_format->tep);
+ kmem_page_size = tep_get_page_size(tp_format->tep);
symbol_conf.use_callchain = true;
}
diff --git a/tools/perf/builtin-kwork.c b/tools/perf/builtin-kwork.c
index c1daf82c9b92..e564da5293b5 100644
--- a/tools/perf/builtin-kwork.c
+++ b/tools/perf/builtin-kwork.c
@@ -1103,7 +1103,8 @@ static char *evsel__softirq_name(struct evsel *evsel, u64 num)
char *name = NULL;
bool found = false;
struct tep_print_flag_sym *sym = NULL;
- struct tep_print_arg *args = evsel->tp_format->print_fmt.args;
+ const struct tep_event *tp_format = evsel__tp_format(evsel);
+ struct tep_print_arg *args = tp_format ? tp_format->print_fmt.args : NULL;
if ((args == NULL) || (args->next == NULL))
return NULL;
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index 6b6d4472db6e..0acdb98314f8 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -2289,8 +2289,13 @@ static void process_event(struct perf_script *script,
}
#ifdef HAVE_LIBTRACEEVENT
if (PRINT_FIELD(TRACE) && sample->raw_data) {
- event_format__fprintf(evsel->tp_format, sample->cpu,
- sample->raw_data, sample->raw_size, fp);
+ const struct tep_event *tp_format = evsel__tp_format(evsel);
+
+ if (tp_format) {
+ event_format__fprintf(tp_format, sample->cpu,
+ sample->raw_data, sample->raw_size,
+ fp);
+ }
}
#endif
if (attr->type == PERF_TYPE_SYNTH && PRINT_FIELD(SYNTH))
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index a661fbd870e7..35214e76c721 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -389,7 +389,12 @@ static struct syscall_arg_fmt *evsel__syscall_arg_fmt(struct evsel *evsel)
}
if (et->fmt == NULL) {
- et->fmt = calloc(evsel->tp_format->format.nr_fields, sizeof(struct syscall_arg_fmt));
+ const struct tep_event *tp_format = evsel__tp_format(evsel);
+
+ if (tp_format == NULL)
+ goto out_delete;
+
+ et->fmt = calloc(tp_format->format.nr_fields, sizeof(struct syscall_arg_fmt));
if (et->fmt == NULL)
goto out_delete;
}
@@ -2154,8 +2159,12 @@ static int evsel__init_tp_arg_scnprintf(struct evsel *evsel, bool *use_btf)
struct syscall_arg_fmt *fmt = evsel__syscall_arg_fmt(evsel);
if (fmt != NULL) {
- syscall_arg_fmt__init_array(fmt, evsel->tp_format->format.fields, use_btf);
- return 0;
+ const struct tep_event *tp_format = evsel__tp_format(evsel);
+
+ if (tp_format) {
+ syscall_arg_fmt__init_array(fmt, tp_format->format.fields, use_btf);
+ return 0;
+ }
}
return -ENOMEM;
@@ -3026,7 +3035,8 @@ static size_t trace__fprintf_tp_fields(struct trace *trace, struct evsel *evsel,
{
char bf[2048];
size_t size = sizeof(bf);
- struct tep_format_field *field = evsel->tp_format->format.fields;
+ const struct tep_event *tp_format = evsel__tp_format(evsel);
+ struct tep_format_field *field = tp_format ? tp_format->format.fields : NULL;
struct syscall_arg_fmt *arg = __evsel__syscall_arg_fmt(evsel);
size_t printed = 0, btf_printed;
unsigned long val;
@@ -3149,11 +3159,13 @@ static int trace__event_handler(struct trace *trace, struct evsel *evsel,
if (evsel__is_bpf_output(evsel)) {
bpf_output__fprintf(trace, sample);
- } else if (evsel->tp_format) {
- if (strncmp(evsel->tp_format->name, "sys_enter_", 10) ||
- trace__fprintf_sys_enter(trace, evsel, sample)) {
+ } else {
+ const struct tep_event *tp_format = evsel__tp_format(evsel);
+
+ if (tp_format && (strncmp(tp_format->name, "sys_enter_", 10) ||
+ trace__fprintf_sys_enter(trace, evsel, sample))) {
if (trace->libtraceevent_print) {
- event_format__fprintf(evsel->tp_format, sample->cpu,
+ event_format__fprintf(tp_format, sample->cpu,
sample->raw_data, sample->raw_size,
trace->output);
} else {
@@ -4081,17 +4093,23 @@ static int ordered_events__deliver_event(struct ordered_events *oe,
static struct syscall_arg_fmt *evsel__find_syscall_arg_fmt_by_name(struct evsel *evsel, char *arg,
char **type)
{
- struct tep_format_field *field;
struct syscall_arg_fmt *fmt = __evsel__syscall_arg_fmt(evsel);
+ const struct tep_event *tp_format;
+
+ if (!fmt)
+ return NULL;
- if (evsel->tp_format == NULL || fmt == NULL)
+ tp_format = evsel__tp_format(evsel);
+ if (!tp_format)
return NULL;
- for (field = evsel->tp_format->format.fields; field; field = field->next, ++fmt)
+ for (const struct tep_format_field *field = tp_format->format.fields; field;
+ field = field->next, ++fmt) {
if (strcmp(field->name, arg) == 0) {
*type = field->type;
return fmt;
}
+ }
return NULL;
}
@@ -4844,13 +4862,18 @@ static void evsel__set_syscall_arg_fmt(struct evsel *evsel, const char *name)
const struct syscall_fmt *scfmt = syscall_fmt__find(name);
if (scfmt) {
- int skip = 0;
+ const struct tep_event *tp_format = evsel__tp_format(evsel);
+
+ if (tp_format) {
+ int skip = 0;
- if (strcmp(evsel->tp_format->format.fields->name, "__syscall_nr") == 0 ||
- strcmp(evsel->tp_format->format.fields->name, "nr") == 0)
- ++skip;
+ if (strcmp(tp_format->format.fields->name, "__syscall_nr") == 0 ||
+ strcmp(tp_format->format.fields->name, "nr") == 0)
+ ++skip;
- memcpy(fmt + skip, scfmt->arg, (evsel->tp_format->format.nr_fields - skip) * sizeof(*fmt));
+ memcpy(fmt + skip, scfmt->arg,
+ (tp_format->format.nr_fields - skip) * sizeof(*fmt));
+ }
}
}
}
@@ -4860,10 +4883,16 @@ static int evlist__set_syscall_tp_fields(struct evlist *evlist, bool *use_btf)
struct evsel *evsel;
evlist__for_each_entry(evlist, evsel) {
- if (evsel->priv || !evsel->tp_format)
+ const struct tep_event *tp_format;
+
+ if (evsel->priv)
+ continue;
+
+ tp_format = evsel__tp_format(evsel);
+ if (!tp_format)
continue;
- if (strcmp(evsel->tp_format->system, "syscalls")) {
+ if (strcmp(tp_format->system, "syscalls")) {
evsel__init_tp_arg_scnprintf(evsel, use_btf);
continue;
}
@@ -4871,20 +4900,24 @@ static int evlist__set_syscall_tp_fields(struct evlist *evlist, bool *use_btf)
if (evsel__init_syscall_tp(evsel))
return -1;
- if (!strncmp(evsel->tp_format->name, "sys_enter_", 10)) {
+ if (!strncmp(tp_format->name, "sys_enter_", 10)) {
struct syscall_tp *sc = __evsel__syscall_tp(evsel);
if (__tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64)))
return -1;
- evsel__set_syscall_arg_fmt(evsel, evsel->tp_format->name + sizeof("sys_enter_") - 1);
- } else if (!strncmp(evsel->tp_format->name, "sys_exit_", 9)) {
+ evsel__set_syscall_arg_fmt(evsel,
+ tp_format->name + sizeof("sys_enter_") - 1);
+ } else if (!strncmp(tp_format->name, "sys_exit_", 9)) {
struct syscall_tp *sc = __evsel__syscall_tp(evsel);
- if (__tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap))
+ if (__tp_field__init_uint(&sc->ret, sizeof(u64),
+ sc->id.offset + sizeof(u64),
+ evsel->needs_swap))
return -1;
- evsel__set_syscall_arg_fmt(evsel, evsel->tp_format->name + sizeof("sys_exit_") - 1);
+ evsel__set_syscall_arg_fmt(evsel,
+ tp_format->name + sizeof("sys_exit_") - 1);
}
}
diff --git a/tools/perf/util/data-convert-bt.c b/tools/perf/util/data-convert-bt.c
index 021e9b1d5cc5..d022d3c2955e 100644
--- a/tools/perf/util/data-convert-bt.c
+++ b/tools/perf/util/data-convert-bt.c
@@ -426,8 +426,9 @@ static int add_tracepoint_values(struct ctf_writer *cw,
struct evsel *evsel,
struct perf_sample *sample)
{
- struct tep_format_field *common_fields = evsel->tp_format->format.common_fields;
- struct tep_format_field *fields = evsel->tp_format->format.fields;
+ const struct tep_event *tp_format = evsel__tp_format(evsel);
+ struct tep_format_field *common_fields = tp_format->format.common_fields;
+ struct tep_format_field *fields = tp_format->format.fields;
int ret;
ret = add_tracepoint_fields_values(cw, event_class, event,
@@ -1064,8 +1065,9 @@ static int add_tracepoint_types(struct ctf_writer *cw,
struct evsel *evsel,
struct bt_ctf_event_class *class)
{
- struct tep_format_field *common_fields = evsel->tp_format->format.common_fields;
- struct tep_format_field *fields = evsel->tp_format->format.fields;
+ const struct tep_event *tp_format = evsel__tp_format(evsel);
+ struct tep_format_field *common_fields = tp_format ? tp_format->format.common_fields : NULL;
+ struct tep_format_field *fields = tp_format ? tp_format->format.fields : NULL;
int ret;
ret = add_tracepoint_fields_types(cw, common_fields, class);
diff --git a/tools/perf/util/data-convert-json.c b/tools/perf/util/data-convert-json.c
index 20bfb0884e9e..eb068f38ca81 100644
--- a/tools/perf/util/data-convert-json.c
+++ b/tools/perf/util/data-convert-json.c
@@ -230,12 +230,12 @@ static int process_sample_event(const struct perf_tool *tool,
#ifdef HAVE_LIBTRACEEVENT
if (sample->raw_data) {
- int i;
- struct tep_format_field **fields;
+ struct tep_event *tp_format = evsel__tp_format(evsel);
+ struct tep_format_field **fields = tp_format ? tep_event_fields(tp_format) : NULL;
- fields = tep_event_fields(evsel->tp_format);
if (fields) {
- i = 0;
+ int i = 0;
+
while (fields[i]) {
struct trace_seq s;
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index f780e30aa259..a95db7e900d5 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -570,6 +570,7 @@ struct evsel *evsel__newtp_idx(const char *sys, const char *name, int idx, bool
evsel->tp_format = trace_event__tp_format(sys, name);
if (IS_ERR(evsel->tp_format)) {
err = PTR_ERR(evsel->tp_format);
+ evsel->tp_format = NULL;
goto out_free;
}
attr.config = evsel->tp_format->id;
@@ -3209,12 +3210,16 @@ u16 evsel__id_hdr_size(const struct evsel *evsel)
#ifdef HAVE_LIBTRACEEVENT
struct tep_format_field *evsel__field(struct evsel *evsel, const char *name)
{
- return tep_find_field(evsel->tp_format, name);
+ struct tep_event *tp_format = evsel__tp_format(evsel);
+
+ return tp_format ? tep_find_field(tp_format, name) : NULL;
}
struct tep_format_field *evsel__common_field(struct evsel *evsel, const char *name)
{
- return tep_find_common_field(evsel->tp_format, name);
+ struct tep_event *tp_format = evsel__tp_format(evsel);
+
+ return tp_format ? tep_find_common_field(tp_format, name) : NULL;
}
void *evsel__rawptr(struct evsel *evsel, struct perf_sample *sample, const char *name)
diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
index 04934a7af174..c3e53d320bf5 100644
--- a/tools/perf/util/evsel.h
+++ b/tools/perf/util/evsel.h
@@ -257,6 +257,11 @@ static inline struct evsel *evsel__newtp(const char *sys, const char *name)
{
return evsel__newtp_idx(sys, name, 0, true);
}
+
+static inline struct tep_event *evsel__tp_format(struct evsel *evsel)
+{
+ return evsel->tp_format;
+}
#endif
#ifdef HAVE_LIBTRACEEVENT
diff --git a/tools/perf/util/evsel_fprintf.c b/tools/perf/util/evsel_fprintf.c
index c2c0500d5da9..54c5702f8c00 100644
--- a/tools/perf/util/evsel_fprintf.c
+++ b/tools/perf/util/evsel_fprintf.c
@@ -81,13 +81,15 @@ int evsel__fprintf(struct evsel *evsel, struct perf_attr_details *details, FILE
#ifdef HAVE_LIBTRACEEVENT
if (details->trace_fields) {
struct tep_format_field *field;
+ const struct tep_event *tp_format;
if (evsel->core.attr.type != PERF_TYPE_TRACEPOINT) {
printed += comma_fprintf(fp, &first, " (not a tracepoint)");
goto out;
}
- field = evsel->tp_format->format.fields;
+ tp_format = evsel__tp_format(evsel);
+ field = tp_format ? tp_format->format.fields : NULL;
if (field == NULL) {
printed += comma_fprintf(fp, &first, " (no trace field)");
goto out;
diff --git a/tools/perf/util/scripting-engines/trace-event-perl.c b/tools/perf/util/scripting-engines/trace-event-perl.c
index e16257d5ab2c..0d63b77b5140 100644
--- a/tools/perf/util/scripting-engines/trace-event-perl.c
+++ b/tools/perf/util/scripting-engines/trace-event-perl.c
@@ -344,7 +344,7 @@ static void perl_process_tracepoint(struct perf_sample *sample,
struct addr_location *al)
{
struct thread *thread = al->thread;
- struct tep_event *event = evsel->tp_format;
+ struct tep_event *event;
struct tep_format_field *field;
static char handler[256];
unsigned long long val;
@@ -362,6 +362,7 @@ static void perl_process_tracepoint(struct perf_sample *sample,
if (evsel->core.attr.type != PERF_TYPE_TRACEPOINT)
return;
+ event = evsel__tp_format(evsel);
if (!event) {
pr_debug("ug! no event found for type %" PRIu64, (u64)evsel->core.attr.config);
return;
diff --git a/tools/perf/util/scripting-engines/trace-event-python.c b/tools/perf/util/scripting-engines/trace-event-python.c
index d7183134b669..77f1ab2d3eac 100644
--- a/tools/perf/util/scripting-engines/trace-event-python.c
+++ b/tools/perf/util/scripting-engines/trace-event-python.c
@@ -946,7 +946,7 @@ static void python_process_tracepoint(struct perf_sample *sample,
struct addr_location *al,
struct addr_location *addr_al)
{
- struct tep_event *event = evsel->tp_format;
+ struct tep_event *event;
PyObject *handler, *context, *t, *obj = NULL, *callchain;
PyObject *dict = NULL, *all_entries_dict = NULL;
static char handler_name[256];
@@ -963,6 +963,7 @@ static void python_process_tracepoint(struct perf_sample *sample,
bitmap_zero(events_defined, TRACE_EVENT_TYPE_MAX);
+ event = evsel__tp_format(evsel);
if (!event) {
snprintf(handler_name, sizeof(handler_name),
"ug! no event found for type %" PRIu64, (u64)evsel->core.attr.config);
diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c
index 168c488f0178..710839ec3f99 100644
--- a/tools/perf/util/sort.c
+++ b/tools/perf/util/sort.c
@@ -1038,17 +1038,19 @@ static char *get_trace_output(struct hist_entry *he)
.data = he->raw_data,
.size = he->raw_size,
};
+ struct tep_event *tp_format;
evsel = hists_to_evsel(he->hists);
trace_seq_init(&seq);
- if (symbol_conf.raw_trace) {
- tep_print_fields(&seq, he->raw_data, he->raw_size,
- evsel->tp_format);
- } else {
- tep_print_event(evsel->tp_format->tep,
- &seq, &rec, "%s", TEP_PRINT_INFO);
+ tp_format = evsel__tp_format(evsel);
+ if (tp_format) {
+ if (symbol_conf.raw_trace)
+ tep_print_fields(&seq, he->raw_data, he->raw_size, tp_format);
+ else
+ tep_print_event(tp_format->tep, &seq, &rec, "%s", TEP_PRINT_INFO);
}
+
/*
* Trim the buffer, it starts at 4KB and we're not going to
* add anything more to this buffer.
@@ -3293,9 +3295,8 @@ static int __dynamic_dimension__add(struct evsel *evsel,
static int add_evsel_fields(struct evsel *evsel, bool raw_trace, int level)
{
int ret;
- struct tep_format_field *field;
-
- field = evsel->tp_format->format.fields;
+ struct tep_event *tp_format = evsel__tp_format(evsel);
+ struct tep_format_field *field = tp_format ? tp_format->format.fields : NULL;
while (field) {
ret = __dynamic_dimension__add(evsel, field, raw_trace, level);
if (ret < 0)
@@ -3328,13 +3329,19 @@ static int add_all_matching_fields(struct evlist *evlist,
{
int ret = -ESRCH;
struct evsel *evsel;
- struct tep_format_field *field;
evlist__for_each_entry(evlist, evsel) {
+ struct tep_event *tp_format;
+ struct tep_format_field *field;
+
if (evsel->core.attr.type != PERF_TYPE_TRACEPOINT)
continue;
- field = tep_find_any_field(evsel->tp_format, field_name);
+ tp_format = evsel__tp_format(evsel);
+ if (tp_format == NULL)
+ continue;
+
+ field = tep_find_any_field(tp_format, field_name);
if (field == NULL)
continue;
@@ -3416,7 +3423,9 @@ static int add_dynamic_entry(struct evlist *evlist, const char *tok,
if (!strcmp(field_name, "*")) {
ret = add_evsel_fields(evsel, raw_trace, level);
} else {
- struct tep_format_field *field = tep_find_any_field(evsel->tp_format, field_name);
+ struct tep_event *tp_format = evsel__tp_format(evsel);
+ struct tep_format_field *field =
+ tp_format ? tep_find_any_field(tp_format, field_name) : NULL;
if (field == NULL) {
pr_debug("Cannot find event field for %s.%s\n",
diff --git a/tools/perf/util/trace-event-scripting.c b/tools/perf/util/trace-event-scripting.c
index bd0000300c77..bab893587863 100644
--- a/tools/perf/util/trace-event-scripting.c
+++ b/tools/perf/util/trace-event-scripting.c
@@ -28,12 +28,14 @@ void scripting_context__update(struct scripting_context *c,
struct addr_location *al,
struct addr_location *addr_al)
{
- c->event_data = sample->raw_data;
- c->pevent = NULL;
#ifdef HAVE_LIBTRACEEVENT
- if (evsel->tp_format)
- c->pevent = evsel->tp_format->tep;
+ const struct tep_event *tp_format = evsel__tp_format(evsel);
+
+ c->pevent = tp_format ? tp_format->tep : NULL;
+#else
+ c->pevent = NULL;
#endif
+ c->event_data = sample->raw_data;
c->event = event;
c->sample = sample;
c->evsel = evsel;
--
2.47.0.277.g8800431eea-goog
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