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109 lines
2.9 KiB
109 lines
2.9 KiB
4 months ago
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/*
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* Copyright (C) 2008 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "monitor.h"
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#include <fcntl.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <log/log.h>
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#include <log/log_event_list.h>
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#include "art_method.h"
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#include "thread.h"
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#define EVENT_LOG_TAG_dvm_lock_sample 20003
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namespace art {
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void Monitor::LogContentionEvent(Thread* self,
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uint32_t wait_ms,
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uint32_t sample_percent,
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ArtMethod* owner_method,
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uint32_t owner_dex_pc) {
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android_log_event_list ctx(EVENT_LOG_TAG_dvm_lock_sample);
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const char* owner_filename;
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int32_t owner_line_number;
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TranslateLocation(owner_method, owner_dex_pc, &owner_filename, &owner_line_number);
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// Emit the process name, <= 37 bytes.
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{
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int fd = open("/proc/self/cmdline", O_RDONLY | O_CLOEXEC);
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char procName[33];
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memset(procName, 0, sizeof(procName));
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read(fd, procName, sizeof(procName) - 1);
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close(fd);
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ctx << procName;
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}
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// Emit the sensitive thread ("main thread") status. We follow tradition that this corresponds
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// to a C++ bool's value, but be explicit.
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constexpr uint32_t kIsSensitive = 1u;
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constexpr uint32_t kIsNotSensitive = 0u;
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ctx << (Thread::IsSensitiveThread() ? kIsSensitive : kIsNotSensitive);
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// Emit self thread name string.
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{
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std::string thread_name;
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self->GetThreadName(thread_name);
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ctx << thread_name;
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}
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// Emit the wait time.
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ctx << wait_ms;
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const char* filename = nullptr;
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{
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uint32_t pc;
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ArtMethod* m = self->GetCurrentMethod(&pc);
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int32_t line_number;
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TranslateLocation(m, pc, &filename, &line_number);
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// Emit the source code file name.
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ctx << filename;
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// Emit the source code line number.
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ctx << line_number;
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// Emit the method name.
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ctx << ArtMethod::PrettyMethod(m);
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}
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// Emit the lock owner source code file name.
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if (owner_filename == nullptr) {
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owner_filename = "";
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} else if (strcmp(filename, owner_filename) == 0) {
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// Common case, so save on log space.
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owner_filename = "-";
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}
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ctx << owner_filename;
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// Emit the source code line number.
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ctx << owner_line_number;
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// Emit the owner method name.
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ctx << ArtMethod::PrettyMethod(owner_method);
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// Emit the sample percentage.
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ctx << sample_percent;
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ctx << LOG_ID_EVENTS;
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}
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} // namespace art
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