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/*
* Copyright (C) 2008 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 "monitor.h"
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <log/log.h>
#include <log/log_event_list.h>
#include "art_method.h"
#include "jni/jni_env_ext.h"
#include "palette/palette.h"
#include "thread.h"
#define EVENT_LOG_TAG_dvm_lock_sample 20003
namespace art {
void Monitor::LogContentionEvent(Thread* self,
uint32_t wait_ms,
uint32_t sample_percent,
ArtMethod* owner_method,
uint32_t owner_dex_pc) {
android_log_event_list ctx(EVENT_LOG_TAG_dvm_lock_sample);
const char* owner_filename;
int32_t owner_line_number;
TranslateLocation(owner_method, owner_dex_pc, &owner_filename, &owner_line_number);
// Emit the process name, <= 33 bytes.
char proc_name[33] = {};
{
int fd = open("/proc/self/cmdline", O_RDONLY | O_CLOEXEC);
read(fd, proc_name, sizeof(proc_name) - 1);
close(fd);
ctx << proc_name;
}
// Emit the sensitive thread ("main thread") status. We follow tradition that this corresponds
// to a C++ bool's value, but be explicit.
constexpr uint32_t kIsSensitive = 1u;
constexpr uint32_t kIsNotSensitive = 0u;
ctx << (Thread::IsSensitiveThread() ? kIsSensitive : kIsNotSensitive);
// Emit self thread name string.
std::string thread_name;
self->GetThreadName(thread_name);
ctx << thread_name;
// Emit the wait time.
ctx << wait_ms;
const char* filename = nullptr;
int32_t line_number;
std::string method_name;
{
uint32_t pc;
ArtMethod* m = self->GetCurrentMethod(&pc);
TranslateLocation(m, pc, &filename, &line_number);
// Emit the source code file name.
ctx << filename;
// Emit the source code line number.
ctx << line_number;
// Emit the method name.
method_name = ArtMethod::PrettyMethod(m);
ctx << method_name;
}
// Emit the lock owner source code file name.
if (owner_filename == nullptr) {
owner_filename = "";
} else if (strcmp(filename, owner_filename) == 0) {
// Common case, so save on log space.
owner_filename = "-";
}
ctx << owner_filename;
// Emit the source code line number.
ctx << owner_line_number;
// Emit the owner method name.
std::string owner_method_name = ArtMethod::PrettyMethod(owner_method);
ctx << owner_method_name;
// Emit the sample percentage.
ctx << sample_percent;
ctx << LOG_ID_EVENTS;
// Now report to other interested parties.
PaletteReportLockContention(self->GetJniEnv(),
wait_ms,
filename,
line_number,
method_name.c_str(),
owner_filename,
owner_line_number,
owner_method_name.c_str(),
proc_name,
thread_name.c_str());
}
} // namespace art
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