Version 3.10.4
Fixed issues when stressing compaction with WeakMaps.
Fixed missing GVN flag for new-space promotion. (Chromium issue 123919)
Simplify invocation sequence at monomorphic function invocation sites. (issue 2079)
Performance and stability improvements on all platforms.
git-svn-id: http://v8.googlecode.com/svn/trunk@11387 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
diff --git a/include/v8.h b/include/v8.h
index 0f05230..430f410 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -863,13 +863,13 @@
* Returns true if this value is the undefined value. See ECMA-262
* 4.3.10.
*/
- V8EXPORT bool IsUndefined() const;
+ inline bool IsUndefined() const;
/**
* Returns true if this value is the null value. See ECMA-262
* 4.3.11.
*/
- V8EXPORT bool IsNull() const;
+ inline bool IsNull() const;
/**
* Returns true if this value is true.
@@ -983,7 +983,11 @@
V8EXPORT bool StrictEquals(Handle<Value> that) const;
private:
+ inline bool QuickIsUndefined() const;
+ inline bool QuickIsNull() const;
inline bool QuickIsString() const;
+ V8EXPORT bool FullIsUndefined() const;
+ V8EXPORT bool FullIsNull() const;
V8EXPORT bool FullIsString() const;
};
@@ -3742,13 +3746,18 @@
/**
+ * A struct for exporting HeapStats data from V8, using "push" model.
+ */
+struct HeapStatsUpdate;
+
+
+/**
* An interface for exporting data from V8, using "push" model.
*/
class V8EXPORT OutputStream { // NOLINT
public:
enum OutputEncoding {
- kAscii = 0, // 7-bit ASCII.
- kUint32 = 1
+ kAscii = 0 // 7-bit ASCII.
};
enum WriteResult {
kContinue = 0,
@@ -3772,9 +3781,7 @@
* can be stopped by returning kAbort as function result. EndOfStream
* will not be called in case writing was aborted.
*/
- // TODO(loislo): Make this pure virtual when WebKit's V8 bindings
- // have been updated.
- virtual WriteResult WriteUint32Chunk(uint32_t* data, int count) {
+ virtual WriteResult WriteHeapStatsChunk(HeapStatsUpdate* data, int count) {
return kAbort;
};
};
@@ -3891,6 +3898,7 @@
static const int kStringResourceOffset =
InternalConstants<kApiPointerSize>::kStringResourceOffset;
+ static const int kOddballKindOffset = 3 * kApiPointerSize;
static const int kForeignAddressOffset = kApiPointerSize;
static const int kJSObjectHeaderSize = 3 * kApiPointerSize;
static const int kFullStringRepresentationMask = 0x07;
@@ -3898,8 +3906,12 @@
static const int kJSObjectType = 0xaa;
static const int kFirstNonstringType = 0x80;
+ static const int kOddballType = 0x82;
static const int kForeignType = 0x85;
+ static const int kUndefinedOddballKind = 5;
+ static const int kNullOddballKind = 3;
+
static inline bool HasHeapObjectTag(internal::Object* value) {
return ((reinterpret_cast<intptr_t>(value) & kHeapObjectTagMask) ==
kHeapObjectTag);
@@ -3919,6 +3931,11 @@
return ReadField<uint8_t>(map, kMapInstanceTypeOffset);
}
+ static inline int GetOddballKind(internal::Object* obj) {
+ typedef internal::Object O;
+ return SmiValue(ReadField<O*>(obj, kOddballKindOffset));
+ }
+
static inline void* GetExternalPointerFromSmi(internal::Object* value) {
const uintptr_t address = reinterpret_cast<uintptr_t>(value);
return reinterpret_cast<void*>(address >> kPointerToSmiShift);
@@ -4200,6 +4217,42 @@
}
+bool Value::IsUndefined() const {
+#ifdef V8_ENABLE_CHECKS
+ return FullIsUndefined();
+#else
+ return QuickIsUndefined();
+#endif
+}
+
+bool Value::QuickIsUndefined() const {
+ typedef internal::Object O;
+ typedef internal::Internals I;
+ O* obj = *reinterpret_cast<O**>(const_cast<Value*>(this));
+ if (!I::HasHeapObjectTag(obj)) return false;
+ if (I::GetInstanceType(obj) != I::kOddballType) return false;
+ return (I::GetOddballKind(obj) == I::kUndefinedOddballKind);
+}
+
+
+bool Value::IsNull() const {
+#ifdef V8_ENABLE_CHECKS
+ return FullIsNull();
+#else
+ return QuickIsNull();
+#endif
+}
+
+bool Value::QuickIsNull() const {
+ typedef internal::Object O;
+ typedef internal::Internals I;
+ O* obj = *reinterpret_cast<O**>(const_cast<Value*>(this));
+ if (!I::HasHeapObjectTag(obj)) return false;
+ if (I::GetInstanceType(obj) != I::kOddballType) return false;
+ return (I::GetOddballKind(obj) == I::kNullOddballKind);
+}
+
+
bool Value::IsString() const {
#ifdef V8_ENABLE_CHECKS
return FullIsString();