You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
101 lines
2.7 KiB
101 lines
2.7 KiB
/*
|
|
* Copyright (C) 2012 The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#include <cutils/trace.h>
|
|
|
|
#include "trace-dev.inc"
|
|
|
|
static pthread_once_t atrace_once_control = PTHREAD_ONCE_INIT;
|
|
|
|
// Set whether tracing is enabled in this process. This is used to prevent
|
|
// the Zygote process from tracing.
|
|
void atrace_set_tracing_enabled(bool enabled)
|
|
{
|
|
atomic_store_explicit(&atrace_is_enabled, enabled, memory_order_release);
|
|
atrace_update_tags();
|
|
}
|
|
|
|
static void atrace_init_once()
|
|
{
|
|
atrace_marker_fd = open("/sys/kernel/tracing/trace_marker", O_WRONLY | O_CLOEXEC);
|
|
if (atrace_marker_fd == -1) {
|
|
atrace_marker_fd = open("/sys/kernel/debug/tracing/trace_marker", O_WRONLY | O_CLOEXEC);
|
|
}
|
|
|
|
if (atrace_marker_fd == -1) {
|
|
ALOGE("Error opening trace file: %s (%d)", strerror(errno), errno);
|
|
atrace_enabled_tags = 0;
|
|
} else {
|
|
atrace_enabled_tags = atrace_get_property();
|
|
}
|
|
}
|
|
|
|
static void atrace_seq_number_changed(uint32_t prev_seq_no, uint32_t seq_no) {
|
|
if (!atomic_load_explicit(&atrace_is_enabled, memory_order_acquire)) {
|
|
return;
|
|
}
|
|
|
|
// Someone raced us.
|
|
if (!atomic_compare_exchange_strong(&last_sequence_number, &prev_seq_no, seq_no)) {
|
|
return;
|
|
}
|
|
|
|
if (CC_UNLIKELY(prev_seq_no == kSeqNoNotInit)) {
|
|
#if defined(__BIONIC__)
|
|
const prop_info* new_pi = __system_property_find("debug.atrace.tags.enableflags");
|
|
if (new_pi) atrace_property_info = new_pi;
|
|
#endif
|
|
pthread_once(&atrace_once_control, atrace_init_once);
|
|
}
|
|
|
|
atrace_update_tags();
|
|
}
|
|
|
|
void atrace_setup()
|
|
{
|
|
atrace_init();
|
|
}
|
|
|
|
void atrace_begin_body(const char* name)
|
|
{
|
|
WRITE_MSG("B|%d|", "%s", name, "");
|
|
}
|
|
|
|
void atrace_end_body()
|
|
{
|
|
WRITE_MSG("E|%d", "%s", "", "");
|
|
}
|
|
|
|
void atrace_async_begin_body(const char* name, int32_t cookie)
|
|
{
|
|
WRITE_MSG("S|%d|", "|%" PRId32, name, cookie);
|
|
}
|
|
|
|
void atrace_async_end_body(const char* name, int32_t cookie)
|
|
{
|
|
WRITE_MSG("F|%d|", "|%" PRId32, name, cookie);
|
|
}
|
|
|
|
void atrace_int_body(const char* name, int32_t value)
|
|
{
|
|
WRITE_MSG("C|%d|", "|%" PRId32, name, value);
|
|
}
|
|
|
|
void atrace_int64_body(const char* name, int64_t value)
|
|
{
|
|
WRITE_MSG("C|%d|", "|%" PRId64, name, value);
|
|
}
|