282 lines
11 KiB
Plaintext
282 lines
11 KiB
Plaintext
/*
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* Copyright (C) 2015-2018 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#import "config.h"
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#import "ResourceUsageThread.h"
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#if ENABLE(RESOURCE_USAGE)
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#import "WorkerThread.h"
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#import <JavaScriptCore/GCActivityCallback.h>
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#import <JavaScriptCore/Heap.h>
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#import <JavaScriptCore/SamplingProfiler.h>
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#import <JavaScriptCore/VM.h>
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#import <mach/mach.h>
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#import <mach/vm_statistics.h>
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#import <wtf/MachSendRight.h>
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#import <wtf/ResourceUsage.h>
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#import <wtf/spi/cocoa/MachVMSPI.h>
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#import <wtf/text/StringConcatenateNumbers.h>
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namespace WebCore {
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static unsigned categoryForVMTag(unsigned tag)
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{
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switch (tag) {
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case VM_MEMORY_IOKIT:
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case VM_MEMORY_LAYERKIT:
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return MemoryCategory::Layers;
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case VM_MEMORY_IMAGEIO:
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case VM_MEMORY_CGIMAGE:
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return MemoryCategory::Images;
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case VM_MEMORY_JAVASCRIPT_JIT_REGISTER_FILE:
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return MemoryCategory::IsoHeap;
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case VM_MEMORY_JAVASCRIPT_JIT_EXECUTABLE_ALLOCATOR:
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return MemoryCategory::JSJIT;
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case VM_MEMORY_JAVASCRIPT_CORE:
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return MemoryCategory::Gigacage;
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case VM_MEMORY_MALLOC:
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case VM_MEMORY_MALLOC_HUGE:
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case VM_MEMORY_MALLOC_LARGE:
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case VM_MEMORY_MALLOC_SMALL:
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case VM_MEMORY_MALLOC_TINY:
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case VM_MEMORY_MALLOC_NANO:
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return MemoryCategory::LibcMalloc;
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case VM_MEMORY_TCMALLOC:
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return MemoryCategory::bmalloc;
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default:
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return MemoryCategory::Other;
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}
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}
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struct ThreadInfo {
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MachSendRight sendRight;
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float usage { 0 };
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String threadName;
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String dispatchQueueName;
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};
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static Vector<ThreadInfo> threadInfos()
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{
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thread_array_t threadList = nullptr;
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mach_msg_type_number_t threadCount = 0;
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kern_return_t kr = task_threads(mach_task_self(), &threadList, &threadCount);
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ASSERT(kr == KERN_SUCCESS);
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if (kr != KERN_SUCCESS)
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return { };
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// Since we collect thread usage without suspending threads, threads retrieved by task_threads can have gone while iterating
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// them to get usage information. If a thread has gone, a system call returns non KERN_SUCCESS, and we just ignore these threads.
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Vector<ThreadInfo> infos;
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for (mach_msg_type_number_t i = 0; i < threadCount; ++i) {
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MachSendRight sendRight = MachSendRight::adopt(threadList[i]);
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thread_info_data_t threadInfo;
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mach_msg_type_number_t threadInfoCount = THREAD_INFO_MAX;
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kr = thread_info(sendRight.sendRight(), THREAD_BASIC_INFO, reinterpret_cast<thread_info_t>(&threadInfo), &threadInfoCount);
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if (kr != KERN_SUCCESS)
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continue;
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thread_identifier_info_data_t threadIdentifierInfo;
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mach_msg_type_number_t threadIdentifierInfoCount = THREAD_IDENTIFIER_INFO_COUNT;
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kr = thread_info(sendRight.sendRight(), THREAD_IDENTIFIER_INFO, reinterpret_cast<thread_info_t>(&threadIdentifierInfo), &threadIdentifierInfoCount);
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if (kr != KERN_SUCCESS)
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continue;
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thread_extended_info_data_t threadExtendedInfo;
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mach_msg_type_number_t threadExtendedInfoCount = THREAD_EXTENDED_INFO_COUNT;
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kr = thread_info(sendRight.sendRight(), THREAD_EXTENDED_INFO, reinterpret_cast<thread_info_t>(&threadExtendedInfo), &threadExtendedInfoCount);
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if (kr != KERN_SUCCESS)
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continue;
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float usage = 0;
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auto threadBasicInfo = reinterpret_cast<thread_basic_info_t>(threadInfo);
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if (!(threadBasicInfo->flags & TH_FLAGS_IDLE))
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usage = threadBasicInfo->cpu_usage / static_cast<float>(TH_USAGE_SCALE) * 100.0;
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// FIXME: dispatch_queue_t can be destroyed concurrently while we are accessing to it here. We should not use it.
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String threadName = String(threadExtendedInfo.pth_name);
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String dispatchQueueName;
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if (threadIdentifierInfo.dispatch_qaddr) {
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dispatch_queue_t queue = *reinterpret_cast<dispatch_queue_t*>(threadIdentifierInfo.dispatch_qaddr);
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dispatchQueueName = String(dispatch_queue_get_label(queue));
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}
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infos.append(ThreadInfo { WTFMove(sendRight), usage, threadName, dispatchQueueName });
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}
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kr = vm_deallocate(mach_task_self(), (vm_offset_t)threadList, threadCount * sizeof(thread_t));
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ASSERT(kr == KERN_SUCCESS);
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return infos;
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}
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void ResourceUsageThread::platformSaveStateBeforeStarting()
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{
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#if ENABLE(SAMPLING_PROFILER)
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m_samplingProfilerMachThread = MACH_PORT_NULL;
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if (auto* profiler = m_vm->samplingProfiler()) {
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if (auto* thread = profiler->thread())
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m_samplingProfilerMachThread = thread->machThread();
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}
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#endif
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}
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void ResourceUsageThread::platformCollectCPUData(JSC::VM*, ResourceUsageData& data)
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{
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Vector<ThreadInfo> threads = threadInfos();
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if (threads.isEmpty()) {
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ASSERT_NOT_REACHED();
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return;
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}
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// Main thread is always first.
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ASSERT(threads[0].dispatchQueueName == "com.apple.main-thread");
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mach_port_t resourceUsageMachThread = mach_thread_self();
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mach_port_t mainThreadMachThread = threads[0].sendRight.sendRight();
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HashSet<mach_port_t> knownWebKitThreads;
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{
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Locker locker { Thread::allThreadsLock() };
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for (auto* thread : Thread::allThreads()) {
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mach_port_t machThread = thread->machThread();
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if (MACH_PORT_VALID(machThread))
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knownWebKitThreads.add(machThread);
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}
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}
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HashMap<mach_port_t, String> knownWorkerThreads;
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{
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Locker locker { WorkerOrWorkletThread::workerOrWorkletThreadsLock() };
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for (auto* thread : WorkerOrWorkletThread::workerOrWorkletThreads()) {
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// Ignore worker threads that have not been fully started yet.
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if (!thread->thread())
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continue;
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mach_port_t machThread = thread->thread()->machThread();
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if (MACH_PORT_VALID(machThread))
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knownWorkerThreads.set(machThread, thread->identifier().isolatedCopy());
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}
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}
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auto isDebuggerThread = [&](const ThreadInfo& thread) -> bool {
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mach_port_t machThread = thread.sendRight.sendRight();
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if (machThread == resourceUsageMachThread)
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return true;
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#if ENABLE(SAMPLING_PROFILER)
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if (machThread == m_samplingProfilerMachThread)
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return true;
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#endif
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return false;
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};
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auto isWebKitThread = [&](const ThreadInfo& thread) -> bool {
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mach_port_t machThread = thread.sendRight.sendRight();
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if (knownWebKitThreads.contains(machThread))
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return true;
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// The bmalloc scavenger thread is below WTF. Detect it by its name.
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if (thread.threadName == "JavaScriptCore bmalloc scavenger")
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return true;
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// WebKit uses many WorkQueues with common prefixes.
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if (thread.dispatchQueueName.startsWith("com.apple.IPC.")
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|| thread.dispatchQueueName.startsWith("com.apple.WebKit.")
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|| thread.dispatchQueueName.startsWith("org.webkit."))
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return true;
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return false;
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};
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for (auto& thread : threads) {
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data.cpu += thread.usage;
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if (isDebuggerThread(thread))
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continue;
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data.cpuExcludingDebuggerThreads += thread.usage;
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mach_port_t machThread = thread.sendRight.sendRight();
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if (machThread == mainThreadMachThread) {
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data.cpuThreads.append(ThreadCPUInfo { "Main Thread"_s, String(), thread.usage, ThreadCPUInfo::Type::Main});
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continue;
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}
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String threadIdentifier = knownWorkerThreads.get(machThread);
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bool isWorkerThread = !threadIdentifier.isEmpty();
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ThreadCPUInfo::Type type = (isWorkerThread || isWebKitThread(thread)) ? ThreadCPUInfo::Type::WebKit : ThreadCPUInfo::Type::Unknown;
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data.cpuThreads.append(ThreadCPUInfo { thread.threadName, threadIdentifier, thread.usage, type });
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}
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}
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void ResourceUsageThread::platformCollectMemoryData(JSC::VM* vm, ResourceUsageData& data)
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{
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auto tags = pagesPerVMTag();
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std::array<TagInfo, MemoryCategory::NumberOfCategories> pagesPerCategory;
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size_t totalDirtyPages = 0;
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for (unsigned i = 0; i < 256; ++i) {
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pagesPerCategory[categoryForVMTag(i)].dirty += tags[i].dirty;
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pagesPerCategory[categoryForVMTag(i)].reclaimable += tags[i].reclaimable;
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totalDirtyPages += tags[i].dirty;
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}
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for (auto& category : data.categories) {
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if (category.isSubcategory) // Only do automatic tallying for top-level categories.
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continue;
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category.dirtySize = pagesPerCategory[category.type].dirty * vmPageSize();
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category.reclaimableSize = pagesPerCategory[category.type].reclaimable * vmPageSize();
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}
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data.totalDirtySize = totalDirtyPages * vmPageSize();
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size_t currentGCHeapCapacity = vm->heap.blockBytesAllocated();
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size_t currentGCOwnedExtra = vm->heap.extraMemorySize();
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size_t currentGCOwnedExternal = vm->heap.externalMemorySize();
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ASSERT(currentGCOwnedExternal <= currentGCOwnedExtra);
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data.categories[MemoryCategory::GCHeap].dirtySize = currentGCHeapCapacity;
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data.categories[MemoryCategory::GCOwned].dirtySize = currentGCOwnedExtra - currentGCOwnedExternal;
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data.categories[MemoryCategory::GCOwned].externalSize = currentGCOwnedExternal;
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auto& mallocBucket = isFastMallocEnabled() ? data.categories[MemoryCategory::bmalloc] : data.categories[MemoryCategory::LibcMalloc];
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// First subtract memory allocated by the GC heap, since we track that separately.
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mallocBucket.dirtySize -= currentGCHeapCapacity;
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// It would be nice to assert that the "GC owned" amount is smaller than the total dirty malloc size,
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// but since the "GC owned" accounting is inexact, it's not currently feasible.
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size_t currentGCOwnedGenerallyInMalloc = currentGCOwnedExtra - currentGCOwnedExternal;
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if (currentGCOwnedGenerallyInMalloc < mallocBucket.dirtySize)
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mallocBucket.dirtySize -= currentGCOwnedGenerallyInMalloc;
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data.totalExternalSize = currentGCOwnedExternal;
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data.timeOfNextEdenCollection = data.timestamp + vm->heap.edenActivityCallback()->timeUntilFire().value_or(Seconds(std::numeric_limits<double>::infinity()));
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data.timeOfNextFullCollection = data.timestamp + vm->heap.fullActivityCallback()->timeUntilFire().value_or(Seconds(std::numeric_limits<double>::infinity()));
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}
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}
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#endif
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