1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
|
// 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 "gin/v8_isolate_memory_dump_provider.h"
#include "base/message_loop/message_loop.h"
#include "base/strings/stringprintf.h"
#include "base/thread_task_runner_handle.h"
#include "base/trace_event/memory_dump_manager.h"
#include "base/trace_event/process_memory_dump.h"
#include "gin/public/isolate_holder.h"
#include "v8/include/v8.h"
namespace gin {
namespace {
const char kRootDumpName[] = "v8";
const char kIsolateDumpName[] = "isolate";
const char kHeapSpacesDumpName[] = "heap_spaces";
const char kAvailableSizeAttribute[] = "available_size_in_bytes";
} // namespace
V8IsolateMemoryDumpProvider::V8IsolateMemoryDumpProvider(
IsolateHolder* isolate_holder)
: isolate_holder_(isolate_holder) {
base::trace_event::MemoryDumpManager::GetInstance()->RegisterDumpProvider(
this, base::ThreadTaskRunnerHandle::Get());
}
V8IsolateMemoryDumpProvider::~V8IsolateMemoryDumpProvider() {
base::trace_event::MemoryDumpManager::GetInstance()->UnregisterDumpProvider(
this);
}
// Called at trace dump point time. Creates a snapshot with the memory counters
// for the current isolate.
bool V8IsolateMemoryDumpProvider::OnMemoryDump(
base::trace_event::ProcessMemoryDump* pmd) {
if (isolate_holder_->access_mode() == IsolateHolder::kUseLocker) {
v8::Locker locked(isolate_holder_->isolate());
DumpMemoryStatistics(pmd);
} else {
DumpMemoryStatistics(pmd);
}
return true;
}
void V8IsolateMemoryDumpProvider::DumpMemoryStatistics(
base::trace_event::ProcessMemoryDump* pmd) {
v8::HeapStatistics heap_statistics;
isolate_holder_->isolate()->GetHeapStatistics(&heap_statistics);
size_t known_spaces_used_size = 0;
size_t known_spaces_size = 0;
size_t known_spaces_available_size = 0;
size_t number_of_spaces = isolate_holder_->isolate()->NumberOfHeapSpaces();
for (size_t space = 0; space < number_of_spaces; space++) {
v8::HeapSpaceStatistics space_statistics;
isolate_holder_->isolate()->GetHeapSpaceStatistics(&space_statistics,
space);
const size_t space_size = space_statistics.space_size();
const size_t space_used_size = space_statistics.space_used_size();
const size_t space_available_size = space_statistics.space_available_size();
known_spaces_size += space_size;
known_spaces_used_size += space_used_size;
known_spaces_available_size += space_available_size;
std::string allocator_name =
base::StringPrintf("%s/%s_%p/%s/%s", kRootDumpName, kIsolateDumpName,
isolate_holder_->isolate(), kHeapSpacesDumpName,
space_statistics.space_name());
base::trace_event::MemoryAllocatorDump* space_dump =
pmd->CreateAllocatorDump(allocator_name);
space_dump->AddScalar(
base::trace_event::MemoryAllocatorDump::kNameOuterSize,
base::trace_event::MemoryAllocatorDump::kUnitsBytes, space_size);
// TODO(ssid): Fix crbug.com/481504 to get the objects count of live objects
// after the last GC.
space_dump->AddScalar(
base::trace_event::MemoryAllocatorDump::kNameInnerSize,
base::trace_event::MemoryAllocatorDump::kUnitsBytes, space_used_size);
space_dump->AddScalar(kAvailableSizeAttribute,
base::trace_event::MemoryAllocatorDump::kUnitsBytes,
space_available_size);
}
// Compute the rest of the memory, not accounted by the spaces above.
std::string allocator_name = base::StringPrintf(
"%s/%s_%p/%s/%s", kRootDumpName, kIsolateDumpName,
isolate_holder_->isolate(), kHeapSpacesDumpName, "other_spaces");
base::trace_event::MemoryAllocatorDump* other_spaces_dump =
pmd->CreateAllocatorDump(allocator_name);
other_spaces_dump->AddScalar(
base::trace_event::MemoryAllocatorDump::kNameOuterSize,
base::trace_event::MemoryAllocatorDump::kUnitsBytes,
heap_statistics.total_heap_size() - known_spaces_size);
other_spaces_dump->AddScalar(
base::trace_event::MemoryAllocatorDump::kNameInnerSize,
base::trace_event::MemoryAllocatorDump::kUnitsBytes,
heap_statistics.used_heap_size() - known_spaces_used_size);
other_spaces_dump->AddScalar(
kAvailableSizeAttribute,
base::trace_event::MemoryAllocatorDump::kUnitsBytes,
heap_statistics.total_available_size() - known_spaces_available_size);
}
} // namespace gin
|
