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
|
#include "node.h"
#include "env.h"
#include "env-inl.h"
#include "util.h"
#include "util-inl.h"
#include "v8.h"
namespace node {
using v8::ArrayBuffer;
using v8::Context;
using v8::Function;
using v8::FunctionCallbackInfo;
using v8::Handle;
using v8::HeapStatistics;
using v8::Isolate;
using v8::Local;
using v8::Object;
using v8::String;
using v8::Uint32;
using v8::Uint32Array;
using v8::V8;
using v8::Value;
#define HEAP_STATISTICS_PROPERTIES(V) \
V(0, total_heap_size, kTotalHeapSizeIndex) \
V(1, total_heap_size_executable, kTotalHeapSizeExecutableIndex) \
V(2, total_physical_size, kTotalPhysicalSizeIndex) \
V(3, total_available_size, kTotalAvailableSize) \
V(4, used_heap_size, kUsedHeapSizeIndex) \
V(5, heap_size_limit, kHeapSizeLimitIndex)
#define V(a, b, c) +1
static const size_t kHeapStatisticsPropertiesCount =
HEAP_STATISTICS_PROPERTIES(V);
#undef V
void UpdateHeapStatisticsArrayBuffer(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
HeapStatistics s;
env->isolate()->GetHeapStatistics(&s);
uint32_t* const buffer = env->heap_statistics_buffer();
#define V(index, name, _) buffer[index] = static_cast<uint32_t>(s.name());
HEAP_STATISTICS_PROPERTIES(V)
#undef V
}
void SetFlagsFromString(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
if (args.Length() < 1)
return env->ThrowTypeError("v8 flag is required");
if (!args[0]->IsString())
return env->ThrowTypeError("v8 flag must be a string");
String::Utf8Value flags(args[0]);
V8::SetFlagsFromString(*flags, flags.length());
}
void InitializeV8Bindings(Handle<Object> target,
Handle<Value> unused,
Handle<Context> context) {
Environment* env = Environment::GetCurrent(context);
env->SetMethod(target,
"updateHeapStatisticsArrayBuffer",
UpdateHeapStatisticsArrayBuffer);
env->SetMethod(target, "setFlagsFromString", SetFlagsFromString);
env->set_heap_statistics_buffer(new uint32_t[kHeapStatisticsPropertiesCount]);
const size_t heap_statistics_buffer_byte_length =
sizeof(*env->heap_statistics_buffer()) * kHeapStatisticsPropertiesCount;
target->Set(FIXED_ONE_BYTE_STRING(env->isolate(),
"heapStatisticsArrayBuffer"),
ArrayBuffer::New(env->isolate(),
env->heap_statistics_buffer(),
heap_statistics_buffer_byte_length));
#define V(i, _, name) \
target->Set(FIXED_ONE_BYTE_STRING(env->isolate(), #name), \
Uint32::NewFromUnsigned(env->isolate(), i));
HEAP_STATISTICS_PROPERTIES(V)
#undef V
}
} // namespace node
NODE_MODULE_CONTEXT_AWARE_BUILTIN(v8, node::InitializeV8Bindings)
|
