Moving platform tracing things into platform/tracing.

third_party/WebKit/Source/platform/web_process_memory_dump.cc

-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "platform/web_process_memory_dump.h"
-
-#include "base/memory/discardable_memory.h"
-#include "base/memory/ptr_util.h"
-#include "base/strings/stringprintf.h"
-#include "base/trace_event/heap_profiler_heap_dump_writer.h"
-#include "base/trace_event/process_memory_dump.h"
-#include "base/trace_event/trace_event_argument.h"
-#include "base/trace_event/trace_event_memory_overhead.h"
-#include "platform/web_memory_allocator_dump.h"
-#include "skia/ext/skia_trace_memory_dump_impl.h"
-#include "wtf/text/StringUTF8Adaptor.h"
-
-#include <stddef.h>
-
-namespace blink {
-
-WebProcessMemoryDump::WebProcessMemoryDump()
-    : owned_process_memory_dump_(
-          new base::trace_event::ProcessMemoryDump(nullptr, { base::trace_event::MemoryDumpLevelOfDetail::DETAILED }))
-    , process_memory_dump_(owned_process_memory_dump_.get())
-    , level_of_detail_(base::trace_event::MemoryDumpLevelOfDetail::DETAILED) {
-}
-
-WebProcessMemoryDump::WebProcessMemoryDump(
-    base::trace_event::MemoryDumpLevelOfDetail level_of_detail,
-    base::trace_event::ProcessMemoryDump* process_memory_dump)
-    : process_memory_dump_(process_memory_dump),
-      level_of_detail_(level_of_detail) {}
-
-WebProcessMemoryDump::~WebProcessMemoryDump() {
-}
-
-blink::WebMemoryAllocatorDump*
-WebProcessMemoryDump::createMemoryAllocatorDump(
-    const String& absolute_name) {
-  StringUTF8Adaptor adapter(absolute_name);
-  std::string name(adapter.data(), adapter.length());
-  // Get a MemoryAllocatorDump from the base/ object.
-  base::trace_event::MemoryAllocatorDump* memory_allocator_dump =
-      process_memory_dump_->CreateAllocatorDump(name);
-
-  return createWebMemoryAllocatorDump(memory_allocator_dump);
-}
-
-blink::WebMemoryAllocatorDump*
-WebProcessMemoryDump::createMemoryAllocatorDump(
-    const String& absolute_name,
-    blink::WebMemoryAllocatorDumpGuid guid) {
-  StringUTF8Adaptor adapter(absolute_name);
-  std::string name(adapter.data(), adapter.length());
-  // Get a MemoryAllocatorDump from the base/ object with given guid.
-  base::trace_event::MemoryAllocatorDump* memory_allocator_dump =
-      process_memory_dump_->CreateAllocatorDump(
-          name,
-          base::trace_event::MemoryAllocatorDumpGuid(guid));
-  return createWebMemoryAllocatorDump(memory_allocator_dump);
-}
-
-blink::WebMemoryAllocatorDump*
-WebProcessMemoryDump::createWebMemoryAllocatorDump(
-    base::trace_event::MemoryAllocatorDump* memory_allocator_dump) {
-  if (!memory_allocator_dump)
-    return nullptr;
-
-  // Wrap it and return to blink.
-  WebMemoryAllocatorDump* web_memory_allocator_dump =
-      new WebMemoryAllocatorDump(memory_allocator_dump);
-
-  // memory_allocator_dumps_ will take ownership of
-  // |web_memory_allocator_dump|.
-  memory_allocator_dumps_.set(
-      memory_allocator_dump, wrapUnique(web_memory_allocator_dump));
-  return web_memory_allocator_dump;
-}
-
-blink::WebMemoryAllocatorDump* WebProcessMemoryDump::getMemoryAllocatorDump(
-    const String& absolute_name) const {
-  StringUTF8Adaptor adapter(absolute_name);
-  std::string name(adapter.data(), adapter.length());
-  // Retrieve the base MemoryAllocatorDump object and then reverse lookup
-  // its wrapper.
-  base::trace_event::MemoryAllocatorDump* memory_allocator_dump =
-      process_memory_dump_->GetAllocatorDump(name);
-  if (!memory_allocator_dump)
-    return nullptr;
-
-  // The only case of (memory_allocator_dump && !web_memory_allocator_dump)
-  // is something from blink trying to get a MAD that was created from chromium,
-  // which is an odd use case.
-  blink::WebMemoryAllocatorDump* web_memory_allocator_dump =
-      memory_allocator_dumps_.get(memory_allocator_dump);
-  DCHECK(web_memory_allocator_dump);
-  return web_memory_allocator_dump;
-}
-
-void WebProcessMemoryDump::clear() {
-  // Clear all the WebMemoryAllocatorDump wrappers.
-  memory_allocator_dumps_.clear();
-
-  // Clear the actual MemoryAllocatorDump objects from the underlying PMD.
-  process_memory_dump_->Clear();
-}
-
-void WebProcessMemoryDump::takeAllDumpsFrom(
-    blink::WebProcessMemoryDump* other) {
-  // WebProcessMemoryDump is a container of WebMemoryAllocatorDump(s) which
-  // in turn are wrappers of base::trace_event::MemoryAllocatorDump(s).
-  // In order to expose the move and ownership transfer semantics of the
-  // underlying ProcessMemoryDump, we need to:
-
-  // 1) Move and transfer the ownership of the wrapped
-  // base::trace_event::MemoryAllocatorDump(s) instances.
-  process_memory_dump_->TakeAllDumpsFrom(other->process_memory_dump_);
-
-  // 2) Move and transfer the ownership of the WebMemoryAllocatorDump wrappers.
-  const size_t expected_final_size = memory_allocator_dumps_.size() +
-                                     other->memory_allocator_dumps_.size();
-  while (!other->memory_allocator_dumps_.isEmpty()) {
-    auto first_entry = other->memory_allocator_dumps_.begin();
-    base::trace_event::MemoryAllocatorDump* memory_allocator_dump =
-        first_entry->key;
-    memory_allocator_dumps_.set(memory_allocator_dump,
-        other->memory_allocator_dumps_.take(memory_allocator_dump));
-  }
-  DCHECK_EQ(expected_final_size, memory_allocator_dumps_.size());
-  DCHECK(other->memory_allocator_dumps_.isEmpty());
-}
-
-void WebProcessMemoryDump::addOwnershipEdge(
-    blink::WebMemoryAllocatorDumpGuid source,
-    blink::WebMemoryAllocatorDumpGuid target,
-    int importance) {
-  process_memory_dump_->AddOwnershipEdge(
-      base::trace_event::MemoryAllocatorDumpGuid(source),
-      base::trace_event::MemoryAllocatorDumpGuid(target), importance);
-}
-
-void WebProcessMemoryDump::addOwnershipEdge(
-    blink::WebMemoryAllocatorDumpGuid source,
-    blink::WebMemoryAllocatorDumpGuid target) {
-  process_memory_dump_->AddOwnershipEdge(
-      base::trace_event::MemoryAllocatorDumpGuid(source),
-      base::trace_event::MemoryAllocatorDumpGuid(target));
-}
-
-void WebProcessMemoryDump::addSuballocation(
-    blink::WebMemoryAllocatorDumpGuid source,
-    const String& target_node_name) {
-  StringUTF8Adaptor adapter(target_node_name);
-  std::string target_node(adapter.data(), adapter.length());
-  process_memory_dump_->AddSuballocation(
-      base::trace_event::MemoryAllocatorDumpGuid(source),
-      target_node);
-}
-
-SkTraceMemoryDump* WebProcessMemoryDump::createDumpAdapterForSkia(
-    const String& dump_name_prefix) {
-  StringUTF8Adaptor adapter(dump_name_prefix);
-  std::string prefix(adapter.data(), adapter.length());
-  sk_trace_dump_list_.push_back(base::WrapUnique(
-      new skia::SkiaTraceMemoryDumpImpl(
-          prefix, level_of_detail_, process_memory_dump_)));
-  return sk_trace_dump_list_.back().get();
-}
-
-blink::WebMemoryAllocatorDump*
-WebProcessMemoryDump::createDiscardableMemoryAllocatorDump(
-    const std::string& name,
-    base::DiscardableMemory* discardable) {
-  base::trace_event::MemoryAllocatorDump* dump =
-      discardable->CreateMemoryAllocatorDump(name.c_str(),
-                                             process_memory_dump_);
-  return createWebMemoryAllocatorDump(dump);
-}
-
-void WebProcessMemoryDump::dumpHeapUsage(
-    const base::hash_map<base::trace_event::AllocationContext,
-        base::trace_event::AllocationMetrics>& metrics_by_context,
-    base::trace_event::TraceEventMemoryOverhead& overhead,
-    const char* allocator_name) {
-  process_memory_dump_->DumpHeapUsage(metrics_by_context, overhead, allocator_name);
-}
-
-}  // namespace content