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last bit of fixes

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This commit is contained in:
Tom Callaway 2019-10-28 08:57:05 -04:00
parent 5d755bc2f7
commit 5a0ab7571f
6 changed files with 2669 additions and 4 deletions
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13
chromium-77-clang.patch Normal file
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@ -0,0 +1,13 @@
diff --git a/base/location.h b/base/location.h
index c07e747..924db1c 100644
--- a/base/location.h
+++ b/base/location.h
@@ -18,7 +18,7 @@
namespace base {
-#if defined(__has_builtin)
+#if defined(__clang__)
// Clang allows detection of these builtins.
#define SUPPORTS_LOCATION_BUILTINS \
(__has_builtin(__builtin_FUNCTION) && __has_builtin(__builtin_FILE) && \

1471
chromium-78-revert-noexcept-r1.patch Normal file
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68
chromium-78.0.3904.70-base-gcc-no-alignas.patch Normal file
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@ -0,0 +1,68 @@
diff -up chromium-77.0.3865.75/base/task/promise/dependent_list.h.base-gcc-no-alignas chromium-77.0.3865.75/base/task/promise/dependent_list.h
--- chromium-77.0.3865.75/base/task/promise/dependent_list.h.base-gcc-no-alignas 2019-09-13 21:45:51.873172347 +0200
+++ chromium-77.0.3865.75/base/task/promise/dependent_list.h 2019-09-13 21:46:21.661522514 +0200
@@ -59,7 +59,7 @@ class BASE_EXPORT DependentList {
// Align Node on an 8-byte boundary to ensure the first 3 bits are 0 and can
// be used to store additional state (see static_asserts below).
- class BASE_EXPORT alignas(8) Node {
+ class BASE_EXPORT ALIGNAS(8) Node {
public:
Node();
explicit Node(Node&& other) noexcept;
--- a/third_party/protobuf/src/google/protobuf/arena.h
+++ b/third_party/protobuf/src/google/protobuf/arena.h
@@ -245,7 +245,7 @@ struct ArenaOptions {
// well as protobuf container types like RepeatedPtrField and Map. The protocol
// is internal to protobuf and is not guaranteed to be stable. Non-proto types
// should not rely on this protocol.
-class PROTOBUF_EXPORT alignas(8) Arena final {
+class PROTOBUF_EXPORT PROTOBUF_ALIGNAS(8) Arena final {
public:
// Arena constructor taking custom options. See ArenaOptions below for
// descriptions of the options available.
--- a/third_party/protobuf/src/google/protobuf/port_def.inc
+++ b/third_party/protobuf/src/google/protobuf/port_def.inc
@@ -528,6 +528,35 @@ PROTOBUF_EXPORT_TEMPLATE_TEST(DEFAULT, __declspec(dllimport));
#undef IN
#endif // _MSC_VER
+// Specify memory alignment for structs, classes, etc.
+// Use like:
+// class PROTOBUF_ALIGNAS(16) MyClass { ... }
+// PROTOBUF_ALIGNAS(16) int array[4];
+//
+// In most places you can use the C++11 keyword "alignas", which is preferred.
+//
+// But compilers have trouble mixing __attribute__((...)) syntax with
+// alignas(...) syntax.
+//
+// Doesn't work in clang or gcc:
+// struct alignas(16) __attribute__((packed)) S { char c; };
+// Works in clang but not gcc:
+// struct __attribute__((packed)) alignas(16) S2 { char c; };
+// Works in clang and gcc:
+// struct alignas(16) S3 { char c; } __attribute__((packed));
+//
+// There are also some attributes that must be specified *before* a class
+// definition: visibility (used for exporting functions/classes) is one of
+// these attributes. This means that it is not possible to use alignas() with a
+// class that is marked as exported.
+#if defined(_MSC_VER)
+#define PROTOBUF_ALIGNAS(byte_alignment) __declspec(align(byte_alignment))
+#elif defined(__GNUC__)
+#define PROTOBUF_ALIGNAS(byte_alignment) __attribute__((aligned(byte_alignment)))
+#else
+#define PROTOBUF_ALIGNAS(byte_alignment) alignas(byte_alignment)
+#endif
+
#if defined(__clang__)
#pragma clang diagnostic push
// TODO(gerbens) ideally we cleanup the code. But a cursory try shows many
--- a/third_party/protobuf/src/google/protobuf/port_undef.inc
+++ b/third_party/protobuf/src/google/protobuf/port_undef.inc
@@ -80,6 +80,7 @@
#undef PROTOBUF_EXPORT_TEMPLATE_STYLE_MATCH_foj3FJo5StF0OvIzl7oMxA__declspec
#undef PROTOBUF_EXPORT_TEMPLATE_STYLE_MATCH_DECLSPEC_dllexport
#undef PROTOBUF_EXPORT_TEMPLATE_STYLE_MATCH_DECLSPEC_dllimport
+#undef PROTOBUF_ALIGNAS

302
chromium-78.0.3904.70-v8-tracedreference-fix.patch Normal file
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diff -up chromium-78.0.3904.70/third_party/blink/renderer/bindings/core/v8/v8_embedder_graph_builder.cc.v8-tracedreference-fix chromium-78.0.3904.70/third_party/blink/renderer/bindings/core/v8/v8_embedder_graph_builder.cc
--- chromium-78.0.3904.70/third_party/blink/renderer/bindings/core/v8/v8_embedder_graph_builder.cc.v8-tracedreference-fix 2019-10-21 15:06:42.000000000 -0400
+++ chromium-78.0.3904.70/third_party/blink/renderer/bindings/core/v8/v8_embedder_graph_builder.cc 2019-10-23 14:30:25.679541652 -0400
@@ -173,8 +173,9 @@ class GC_PLUGIN_IGNORE(
uint16_t class_id) override;
// v8::EmbedderHeapTracer::TracedGlobalHandleVisitor override.
- void VisitTracedGlobalHandle(
- const v8::TracedGlobal<v8::Value>& value) override;
+ void VisitTracedReference(
+ const v8::TracedReference<v8::Value>& value) override;
+ void VisitTracedGlobalHandle(const v8::TracedGlobal<v8::Value>&) override;
// Visitor overrides.
void VisitRoot(void*, TraceDescriptor, const base::Location&) final;
@@ -508,8 +509,8 @@ void V8EmbedderGraphBuilder::VisitPersis
}
}
-void V8EmbedderGraphBuilder::VisitTracedGlobalHandle(
- const v8::TracedGlobal<v8::Value>& value) {
+void V8EmbedderGraphBuilder::VisitTracedReference(
+ const v8::TracedReference<v8::Value>& value) {
const uint16_t class_id = value.WrapperClassId();
if (class_id != WrapperTypeInfo::kNodeClassId &&
class_id != WrapperTypeInfo::kObjectClassId)
@@ -517,6 +518,11 @@ void V8EmbedderGraphBuilder::VisitTraced
VisitPersistentHandleInternal(value.As<v8::Object>().Get(isolate_), class_id);
}
+void V8EmbedderGraphBuilder::VisitTracedGlobalHandle(
+ const v8::TracedGlobal<v8::Value>&) {
+ CHECK(false) << "Blink does not use v8::TracedGlobal.";
+}
+
void V8EmbedderGraphBuilder::VisitPersistentHandle(
v8::Persistent<v8::Value>* value,
uint16_t class_id) {
diff -up chromium-78.0.3904.70/third_party/blink/renderer/bindings/core/v8/v8_gc_controller.cc.v8-tracedreference-fix chromium-78.0.3904.70/third_party/blink/renderer/bindings/core/v8/v8_gc_controller.cc
--- chromium-78.0.3904.70/third_party/blink/renderer/bindings/core/v8/v8_gc_controller.cc.v8-tracedreference-fix 2019-10-21 15:06:42.000000000 -0400
+++ chromium-78.0.3904.70/third_party/blink/renderer/bindings/core/v8/v8_gc_controller.cc 2019-10-23 14:30:25.683541568 -0400
@@ -260,7 +260,11 @@ class DOMWrapperForwardingVisitor final
VisitHandle(value, class_id);
}
- void VisitTracedGlobalHandle(const v8::TracedGlobal<v8::Value>& value) final {
+ void VisitTracedGlobalHandle(const v8::TracedGlobal<v8::Value>&) final {
+ CHECK(false) << "Blink does not use v8::TracedGlobal.";
+ }
+
+ void VisitTracedReference(const v8::TracedReference<v8::Value>& value) final {
VisitHandle(&value, value.WrapperClassId());
}
diff -up chromium-78.0.3904.70/third_party/blink/renderer/platform/bindings/dom_data_store.h.v8-tracedreference-fix chromium-78.0.3904.70/third_party/blink/renderer/platform/bindings/dom_data_store.h
--- chromium-78.0.3904.70/third_party/blink/renderer/platform/bindings/dom_data_store.h.v8-tracedreference-fix 2019-10-21 15:06:44.000000000 -0400
+++ chromium-78.0.3904.70/third_party/blink/renderer/platform/bindings/dom_data_store.h 2019-10-23 14:30:25.685541526 -0400
@@ -229,6 +229,11 @@ class DOMDataStore {
DOMWorldWrapperReference(v8::Isolate* isolate, v8::Local<v8::Object> handle)
: TraceWrapperV8Reference(isolate, handle) {}
+ ~DOMWorldWrapperReference() {
+ // Destruction of a reference should clear it immediately.
+ Clear();
+ }
+
// Move support without write barrier.
DOMWorldWrapperReference(DOMWorldWrapperReference&& other)
: TraceWrapperV8Reference() {
diff -up chromium-78.0.3904.70/third_party/blink/renderer/platform/bindings/script_wrappable.h.v8-tracedreference-fix chromium-78.0.3904.70/third_party/blink/renderer/platform/bindings/script_wrappable.h
--- chromium-78.0.3904.70/third_party/blink/renderer/platform/bindings/script_wrappable.h.v8-tracedreference-fix 2019-10-21 15:06:44.000000000 -0400
+++ chromium-78.0.3904.70/third_party/blink/renderer/platform/bindings/script_wrappable.h 2019-10-23 14:30:25.687541484 -0400
@@ -161,6 +161,11 @@ class PLATFORM_EXPORT ScriptWrappable
return main_world_wrapper_.NewLocal(isolate);
}
+ static_assert(
+ std::is_trivially_destructible<
+ TraceWrapperV8Reference<v8::Object>>::value,
+ "TraceWrapperV8Reference<v8::Object> should be trivially destructible.");
+
TraceWrapperV8Reference<v8::Object> main_world_wrapper_;
DISALLOW_COPY_AND_ASSIGN(ScriptWrappable);
diff -up chromium-78.0.3904.70/third_party/blink/renderer/platform/bindings/trace_wrapper_v8_reference.h.v8-tracedreference-fix chromium-78.0.3904.70/third_party/blink/renderer/platform/bindings/trace_wrapper_v8_reference.h
--- chromium-78.0.3904.70/third_party/blink/renderer/platform/bindings/trace_wrapper_v8_reference.h.v8-tracedreference-fix 2019-10-21 15:06:44.000000000 -0400
+++ chromium-78.0.3904.70/third_party/blink/renderer/platform/bindings/trace_wrapper_v8_reference.h 2019-10-23 14:30:25.688541463 -0400
@@ -11,15 +11,6 @@
#include "third_party/blink/renderer/platform/heap/unified_heap_marking_visitor.h"
#include "v8/include/v8.h"
-namespace v8 {
-
-template <typename T>
-struct TracedGlobalTrait<v8::TracedGlobal<T>> {
- static constexpr bool kRequiresExplicitDestruction = false;
-};
-
-} // namespace v8
-
namespace blink {
/**
@@ -50,8 +41,8 @@ class TraceWrapperV8Reference {
bool IsEmpty() const { return handle_.IsEmpty(); }
void Clear() { handle_.Reset(); }
- ALWAYS_INLINE const v8::TracedGlobal<T>& Get() const { return handle_; }
- ALWAYS_INLINE v8::TracedGlobal<T>& Get() { return handle_; }
+ ALWAYS_INLINE const v8::TracedReference<T>& Get() const { return handle_; }
+ ALWAYS_INLINE v8::TracedReference<T>& Get() { return handle_; }
template <typename S>
const TraceWrapperV8Reference<S>& Cast() const {
@@ -124,7 +115,7 @@ class TraceWrapperV8Reference {
UnifiedHeapMarkingVisitor::WriteBarrier(UnsafeCast<v8::Value>());
}
- v8::TracedGlobal<T> handle_;
+ v8::TracedReference<T> handle_;
};
} // namespace blink
diff -up chromium-78.0.3904.70/third_party/blink/renderer/platform/bindings/wrapper_type_info.h.v8-tracedreference-fix chromium-78.0.3904.70/third_party/blink/renderer/platform/bindings/wrapper_type_info.h
--- chromium-78.0.3904.70/third_party/blink/renderer/platform/bindings/wrapper_type_info.h.v8-tracedreference-fix 2019-10-21 15:06:44.000000000 -0400
+++ chromium-78.0.3904.70/third_party/blink/renderer/platform/bindings/wrapper_type_info.h 2019-10-23 14:30:25.689541442 -0400
@@ -122,7 +122,7 @@ struct WrapperTypeInfo {
wrapper->SetWrapperClassId(wrapper_class_id);
}
- void ConfigureWrapper(v8::TracedGlobal<v8::Object>* wrapper) const {
+ void ConfigureWrapper(v8::TracedReference<v8::Object>* wrapper) const {
wrapper->SetWrapperClassId(wrapper_class_id);
}
@@ -177,7 +177,7 @@ inline T* GetInternalField(const v8::Per
}
template <typename T, int offset>
-inline T* GetInternalField(const v8::TracedGlobal<v8::Object>& global) {
+inline T* GetInternalField(const v8::TracedReference<v8::Object>& global) {
DCHECK_LT(offset, v8::Object::InternalFieldCount(global));
return reinterpret_cast<T*>(
v8::Object::GetAlignedPointerFromInternalField(global, offset));
@@ -198,7 +198,7 @@ inline ScriptWrappable* ToScriptWrappabl
}
inline ScriptWrappable* ToScriptWrappable(
- const v8::TracedGlobal<v8::Object>& wrapper) {
+ const v8::TracedReference<v8::Object>& wrapper) {
return GetInternalField<ScriptWrappable, kV8DOMWrapperObjectIndex>(wrapper);
}
@@ -219,7 +219,8 @@ inline void* ToUntypedWrappable(const v8
return GetInternalField<void, kV8DOMWrapperObjectIndex>(wrapper);
}
-inline void* ToUntypedWrappable(const v8::TracedGlobal<v8::Object>& wrapper) {
+inline void* ToUntypedWrappable(
+ const v8::TracedReference<v8::Object>& wrapper) {
return GetInternalField<void, kV8DOMWrapperObjectIndex>(wrapper);
}
@@ -233,7 +234,7 @@ inline const WrapperTypeInfo* ToWrapperT
}
inline const WrapperTypeInfo* ToWrapperTypeInfo(
- const v8::TracedGlobal<v8::Object>& wrapper) {
+ const v8::TracedReference<v8::Object>& wrapper) {
return GetInternalField<WrapperTypeInfo, kV8DOMWrapperTypeIndex>(wrapper);
}
diff -up chromium-78.0.3904.70/third_party/blink/renderer/platform/heap/thread_state.cc.v8-tracedreference-fix chromium-78.0.3904.70/third_party/blink/renderer/platform/heap/thread_state.cc
--- chromium-78.0.3904.70/third_party/blink/renderer/platform/heap/thread_state.cc.v8-tracedreference-fix 2019-10-21 15:06:45.000000000 -0400
+++ chromium-78.0.3904.70/third_party/blink/renderer/platform/heap/thread_state.cc 2019-10-23 14:30:25.693541359 -0400
@@ -1451,11 +1451,15 @@ class ClearReferencesInDeadObjectsVisito
value->Reset();
}
- void VisitTracedGlobalHandle(const v8::TracedGlobal<v8::Value>& value) final {
+ void VisitTracedGlobalHandle(const v8::TracedGlobal<v8::Value>&) final {
+ CHECK(false) << "Blink does not use v8::TracedGlobal.";
+ }
+
+ void VisitTracedReference(const v8::TracedReference<v8::Value>& value) final {
// TODO(mlippautz): Avoid const_cast after changing the API to allow
- // modificaton of the TracedGlobal handle.
- if (InDeadObject(&const_cast<v8::TracedGlobal<v8::Value>&>(value)))
- const_cast<v8::TracedGlobal<v8::Value>&>(value).Reset();
+ // modificaton of the handle.
+ if (InDeadObject(&const_cast<v8::TracedReference<v8::Value>&>(value)))
+ const_cast<v8::TracedReference<v8::Value>&>(value).Reset();
}
private:
@@ -1584,11 +1588,15 @@ class UnpoisonHandlesVisitor final
VisitSlot(value, sizeof(v8::Persistent<v8::Value>));
}
- void VisitTracedGlobalHandle(const v8::TracedGlobal<v8::Value>& value) final {
+ void VisitTracedGlobalHandle(const v8::TracedGlobal<v8::Value>&) final {
+ CHECK(false) << "Blink does not use v8::TracedGlobal.";
+ }
+
+ void VisitTracedReference(const v8::TracedReference<v8::Value>& value) final {
// TODO(mlippautz): Avoid const_cast after changing the API to allow
- // modificaton of the TracedGlobal handle.
- VisitSlot(&const_cast<v8::TracedGlobal<v8::Value>&>(value),
- sizeof(v8::TracedGlobal<v8::Value>));
+ // modificaton of the handle.
+ VisitSlot(&const_cast<v8::TracedReference<v8::Value>&>(value),
+ sizeof(v8::TracedReference<v8::Value>));
}
private:
diff -up chromium-78.0.3904.70/third_party/blink/renderer/platform/heap/unified_heap_controller.cc.v8-tracedreference-fix chromium-78.0.3904.70/third_party/blink/renderer/platform/heap/unified_heap_controller.cc
--- chromium-78.0.3904.70/third_party/blink/renderer/platform/heap/unified_heap_controller.cc.v8-tracedreference-fix 2019-10-21 15:06:45.000000000 -0400
+++ chromium-78.0.3904.70/third_party/blink/renderer/platform/heap/unified_heap_controller.cc 2019-10-23 14:32:34.722840885 -0400
@@ -147,16 +147,19 @@ bool UnifiedHeapController::IsTracingDon
return is_tracing_done_;
}
-bool UnifiedHeapController::IsRootForNonTracingGCInternal(
- const v8::TracedGlobal<v8::Value>& handle) {
+namespace {
+
+bool IsRootForNonTracingGCInternal(
+ const v8::TracedReference<v8::Value>& handle) {
const uint16_t class_id = handle.WrapperClassId();
- // Stand-alone TracedGlobal reference or kCustomWrappableId. Keep as root as
+ // Stand-alone reference or kCustomWrappableId. Keep as root as
// we don't know better.
if (class_id != WrapperTypeInfo::kNodeClassId &&
class_id != WrapperTypeInfo::kObjectClassId)
return true;
- const v8::TracedGlobal<v8::Object>& traced = handle.As<v8::Object>();
+ const v8::TracedReference<v8::Object>& traced =
+ handle.template As<v8::Object>();
if (ToWrapperTypeInfo(traced)->IsActiveScriptWrappable() &&
ToScriptWrappable(traced)->HasPendingActivity()) {
return true;
@@ -169,8 +172,10 @@ bool UnifiedHeapController::IsRootForNon
return false;
}
+} // namespace
+
void UnifiedHeapController::ResetHandleInNonTracingGC(
- const v8::TracedGlobal<v8::Value>& handle) {
+ const v8::TracedReference<v8::Value>& handle) {
const uint16_t class_id = handle.WrapperClassId();
// Only consider handles that have not been treated as roots, see
// IsRootForNonTracingGCInternal.
@@ -178,15 +183,21 @@ void UnifiedHeapController::ResetHandleI
class_id != WrapperTypeInfo::kObjectClassId)
return;
- const v8::TracedGlobal<v8::Object>& traced = handle.As<v8::Object>();
+ const v8::TracedReference<v8::Object>& traced = handle.As<v8::Object>();
ToScriptWrappable(traced)->UnsetWrapperIfAny();
}
bool UnifiedHeapController::IsRootForNonTracingGC(
- const v8::TracedGlobal<v8::Value>& handle) {
+ const v8::TracedReference<v8::Value>& handle) {
return IsRootForNonTracingGCInternal(handle);
}
+bool UnifiedHeapController::IsRootForNonTracingGC(
+ const v8::TracedGlobal<v8::Value>& handle) {
+ CHECK(false) << "Blink does not use v8::TracedGlobal.";
+ return false;
+}
+
void UnifiedHeapController::ReportBufferedAllocatedSizeIfPossible() {
DCHECK(base::FeatureList::IsEnabled(
blink::features::kBlinkHeapUnifiedGCScheduling));
diff -up chromium-78.0.3904.70/third_party/blink/renderer/platform/heap/unified_heap_controller.h.v8-tracedreference-fix chromium-78.0.3904.70/third_party/blink/renderer/platform/heap/unified_heap_controller.h
--- chromium-78.0.3904.70/third_party/blink/renderer/platform/heap/unified_heap_controller.h.v8-tracedreference-fix 2019-10-21 15:06:45.000000000 -0400
+++ chromium-78.0.3904.70/third_party/blink/renderer/platform/heap/unified_heap_controller.h 2019-10-23 14:30:25.695541317 -0400
@@ -45,8 +45,9 @@ class PLATFORM_EXPORT UnifiedHeapControl
void RegisterV8References(const std::vector<std::pair<void*, void*>>&) final;
bool AdvanceTracing(double) final;
bool IsTracingDone() final;
+ bool IsRootForNonTracingGC(const v8::TracedReference<v8::Value>&) final;
bool IsRootForNonTracingGC(const v8::TracedGlobal<v8::Value>&) final;
- void ResetHandleInNonTracingGC(const v8::TracedGlobal<v8::Value>&) final;
+ void ResetHandleInNonTracingGC(const v8::TracedReference<v8::Value>&) final;
ThreadState* thread_state() const { return thread_state_; }
@@ -59,9 +60,6 @@ class PLATFORM_EXPORT UnifiedHeapControl
void DecreaseAllocatedSpace(size_t) final {}
private:
- static bool IsRootForNonTracingGCInternal(
- const v8::TracedGlobal<v8::Value>& handle);
-
void ReportBufferedAllocatedSizeIfPossible();
ThreadState* const thread_state_;

23
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v8-implement-tracedreference.patch Normal file
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@ -0,0 +1,796 @@
diff -up chromium-78.0.3904.70/v8/include/v8.h.implement-tracedreference chromium-78.0.3904.70/v8/include/v8.h
--- chromium-78.0.3904.70/v8/include/v8.h.implement-tracedreference 2019-10-24 08:58:26.185640117 -0400
+++ chromium-78.0.3904.70/v8/include/v8.h 2019-10-24 09:18:33.719546481 -0400
@@ -96,6 +96,10 @@ template <class T>
class Global;
template <class T>
class TracedGlobal;
+template <class T>
+class TracedReference;
+template <class T>
+class TracedReferenceBase;
template<class K, class V, class T> class PersistentValueMap;
template <class K, class V, class T>
class PersistentValueMapBase;
@@ -281,7 +285,8 @@ class Local {
V8_INLINE static Local<T> New(Isolate* isolate, Local<T> that);
V8_INLINE static Local<T> New(Isolate* isolate,
const PersistentBase<T>& that);
- V8_INLINE static Local<T> New(Isolate* isolate, const TracedGlobal<T>& that);
+ V8_INLINE static Local<T> New(Isolate* isolate,
+ const TracedReferenceBase<T>& that);
private:
friend class Utils;
@@ -311,7 +316,13 @@ class Local {
template <class F>
friend class ReturnValue;
template <class F>
+ friend class Traced;
+ template <class F>
friend class TracedGlobal;
+ template <class F>
+ friend class TracedReferenceBase;
+ template <class F>
+ friend class TracedReference;
explicit V8_INLINE Local(T* that) : val_(that) {}
V8_INLINE static Local<T> New(Isolate* isolate, T* that);
@@ -792,22 +803,10 @@ template <class T>
using UniquePersistent = Global<T>;
/**
- * Trait specifying behavior of |TracedGlobal<T>|.
+ * Deprecated. Use |TracedReference<T>| instead.
*/
template <typename T>
-struct TracedGlobalTrait {
- /**
- * Specifies whether |TracedGlobal<T>| should clear its handle on destruction.
- *
- * V8 will *not* clear the embedder-side memory of the handle. The embedder is
- * expected to report all |TracedGlobal<T>| handles through
- * |EmbedderHeapTracer| upon garabge collection.
- *
- * See |EmbedderHeapTracer::IsRootForNonTracingGC| for handling with
- * non-tracing GCs in V8.
- */
- static constexpr bool kRequiresExplicitDestruction = true;
-};
+struct TracedGlobalTrait {};
/**
* A traced handle with copy and move semantics. The handle is to be used
@@ -820,15 +819,131 @@ struct TracedGlobalTrait {
* |v8::EmbedderHeapTracer::IsRootForNonTracingGC()| whether the handle should
* be treated as root or not.
*
- * For destruction semantics see |TracedGlobalTrait<T>|.
+ * Note that the base class cannot be instantiated itself. Choose from
+ * - TracedGlobal
+ * - TracedReference
*/
template <typename T>
-class TracedGlobal {
+class TracedReferenceBase {
public:
/**
+ * Returns true if this TracedReferenceBase is empty, i.e., has not been
+ * assigned an object.
+ */
+ bool IsEmpty() const { return val_ == nullptr; }
+
+ /**
+ * If non-empty, destroy the underlying storage cell. |IsEmpty| will return
+ * true after this call.
+ */
+ V8_INLINE void Reset();
+
+ /**
+ * Construct a Local<T> from this handle.
+ */
+ Local<T> Get(Isolate* isolate) const { return Local<T>::New(isolate, *this); }
+
+ template <class S>
+ V8_INLINE bool operator==(const TracedReferenceBase<S>& that) const {
+ internal::Address* a = reinterpret_cast<internal::Address*>(val_);
+ internal::Address* b = reinterpret_cast<internal::Address*>(that.val_);
+ if (a == nullptr) return b == nullptr;
+ if (b == nullptr) return false;
+ return *a == *b;
+ }
+
+ template <class S>
+ V8_INLINE bool operator==(const Local<S>& that) const {
+ internal::Address* a = reinterpret_cast<internal::Address*>(val_);
+ internal::Address* b = reinterpret_cast<internal::Address*>(that.val_);
+ if (a == nullptr) return b == nullptr;
+ if (b == nullptr) return false;
+ return *a == *b;
+ }
+
+ template <class S>
+ V8_INLINE bool operator!=(const TracedReferenceBase<S>& that) const {
+ return !operator==(that);
+ }
+
+ template <class S>
+ V8_INLINE bool operator!=(const Local<S>& that) const {
+ return !operator==(that);
+ }
+
+ /**
+ * Assigns a wrapper class ID to the handle.
+ */
+ V8_INLINE void SetWrapperClassId(uint16_t class_id);
+
+ /**
+ * Returns the class ID previously assigned to this handle or 0 if no class ID
+ * was previously assigned.
+ */
+ V8_INLINE uint16_t WrapperClassId() const;
+
+ /**
+ * Adds a finalization callback to the handle. The type of this callback is
+ * similar to WeakCallbackType::kInternalFields, i.e., it will pass the
+ * parameter and the first two internal fields of the object.
+ *
+ * The callback is then supposed to reset the handle in the callback. No
+ * further V8 API may be called in this callback. In case additional work
+ * involving V8 needs to be done, a second callback can be scheduled using
+ * WeakCallbackInfo<void>::SetSecondPassCallback.
+ */
+ V8_INLINE void SetFinalizationCallback(
+ void* parameter, WeakCallbackInfo<void>::Callback callback);
+
+ template <class S>
+ V8_INLINE TracedReferenceBase<S>& As() const {
+ return reinterpret_cast<TracedReferenceBase<S>&>(
+ const_cast<TracedReferenceBase<T>&>(*this));
+ }
+
+ private:
+ enum DestructionMode { kWithDestructor, kWithoutDestructor };
+
+ /**
+ * An empty TracedReferenceBase without storage cell.
+ */
+ TracedReferenceBase() = default;
+
+ V8_INLINE static T* New(Isolate* isolate, T* that, void* slot,
+ DestructionMode destruction_mode);
+
+ T* val_ = nullptr;
+
+ friend class EmbedderHeapTracer;
+ template <typename F>
+ friend class Local;
+ friend class Object;
+ template <typename F>
+ friend class TracedGlobal;
+ template <typename F>
+ friend class TracedReference;
+ template <typename F>
+ friend class ReturnValue;
+};
+
+/**
+ * A traced handle with destructor that clears the handle. For more details see
+ * TracedReferenceBase.
+ */
+template <typename T>
+class TracedGlobal : public TracedReferenceBase<T> {
+ public:
+ using TracedReferenceBase<T>::Reset;
+
+ /**
+ * Destructor resetting the handle.
+ */
+ ~TracedGlobal() { this->Reset(); }
+
+ /**
* An empty TracedGlobal without storage cell.
*/
- TracedGlobal() = default;
+ TracedGlobal() : TracedReferenceBase<T>() {}
/**
* Construct a TracedGlobal from a Local.
@@ -837,8 +952,9 @@ class TracedGlobal {
* pointing to the same object.
*/
template <class S>
- TracedGlobal(Isolate* isolate, Local<S> that)
- : val_(New(isolate, *that, &val_)) {
+ TracedGlobal(Isolate* isolate, Local<S> that) : TracedReferenceBase<T>() {
+ this->val_ = this->New(isolate, that.val_, &this->val_,
+ TracedReferenceBase<T>::kWithDestructor);
TYPE_CHECK(T, S);
}
@@ -905,121 +1021,126 @@ class TracedGlobal {
V8_INLINE TracedGlobal& operator=(const TracedGlobal<S>& rhs);
/**
- * Returns true if this TracedGlobal is empty, i.e., has not been assigned an
- * object.
- */
- bool IsEmpty() const { return val_ == nullptr; }
-
- /**
- * If non-empty, destroy the underlying storage cell. |IsEmpty| will return
- * true after this call.
- */
- V8_INLINE void Reset();
-
- /**
* If non-empty, destroy the underlying storage cell and create a new one with
* the contents of other if other is non empty
*/
template <class S>
V8_INLINE void Reset(Isolate* isolate, const Local<S>& other);
- /**
- * Construct a Local<T> from this handle.
- */
- Local<T> Get(Isolate* isolate) const { return Local<T>::New(isolate, *this); }
-
template <class S>
V8_INLINE TracedGlobal<S>& As() const {
return reinterpret_cast<TracedGlobal<S>&>(
const_cast<TracedGlobal<T>&>(*this));
}
+};
- template <class S>
- V8_INLINE bool operator==(const TracedGlobal<S>& that) const {
- internal::Address* a = reinterpret_cast<internal::Address*>(**this);
- internal::Address* b = reinterpret_cast<internal::Address*>(*that);
- if (a == nullptr) return b == nullptr;
- if (b == nullptr) return false;
- return *a == *b;
- }
+/**
+ * A traced handle without destructor that clears the handle. The embedder needs
+ * to ensure that the handle is not accessed once the V8 object has been
+ * reclaimed. This can happen when the handle is not passed through the
+ * EmbedderHeapTracer. For more details see TracedReferenceBase.
+ */
+template <typename T>
+class TracedReference : public TracedReferenceBase<T> {
+ public:
+ using TracedReferenceBase<T>::Reset;
+
+ /**
+ * An empty TracedReference without storage cell.
+ */
+ TracedReference() : TracedReferenceBase<T>() {}
+ /**
+ * Construct a TracedReference from a Local.
+ *
+ * When the Local is non-empty, a new storage cell is created
+ * pointing to the same object.
+ */
template <class S>
- V8_INLINE bool operator==(const Local<S>& that) const {
- internal::Address* a = reinterpret_cast<internal::Address*>(**this);
- internal::Address* b = reinterpret_cast<internal::Address*>(*that);
- if (a == nullptr) return b == nullptr;
- if (b == nullptr) return false;
- return *a == *b;
+ TracedReference(Isolate* isolate, Local<S> that) : TracedReferenceBase<T>() {
+ this->val_ = this->New(isolate, that.val_, &this->val_,
+ TracedReferenceBase<T>::kWithoutDestructor);
+ TYPE_CHECK(T, S);
}
- template <class S>
- V8_INLINE bool operator!=(const TracedGlobal<S>& that) const {
- return !operator==(that);
+ /**
+ * Move constructor initializing TracedReference from an
+ * existing one.
+ */
+ V8_INLINE TracedReference(TracedReference&& other) {
+ // Forward to operator=.
+ *this = std::move(other);
}
- template <class S>
- V8_INLINE bool operator!=(const Local<S>& that) const {
- return !operator==(that);
+ /**
+ * Move constructor initializing TracedReference from an
+ * existing one.
+ */
+ template <typename S>
+ V8_INLINE TracedReference(TracedReference<S>&& other) {
+ // Forward to operator=.
+ *this = std::move(other);
}
/**
- * Assigns a wrapper class ID to the handle.
+ * Copy constructor initializing TracedReference from an
+ * existing one.
*/
- V8_INLINE void SetWrapperClassId(uint16_t class_id);
+ V8_INLINE TracedReference(const TracedReference& other) {
+ // Forward to operator=;
+ *this = other;
+ }
/**
- * Returns the class ID previously assigned to this handle or 0 if no class ID
- * was previously assigned.
+ * Copy constructor initializing TracedReference from an
+ * existing one.
*/
- V8_INLINE uint16_t WrapperClassId() const;
+ template <typename S>
+ V8_INLINE TracedReference(const TracedReference<S>& other) {
+ // Forward to operator=;
+ *this = other;
+ }
/**
- * Adds a finalization callback to the handle. The type of this callback is
- * similar to WeakCallbackType::kInternalFields, i.e., it will pass the
- * parameter and the first two internal fields of the object.
- *
- * The callback is then supposed to reset the handle in the callback. No
- * further V8 API may be called in this callback. In case additional work
- * involving V8 needs to be done, a second callback can be scheduled using
- * WeakCallbackInfo<void>::SetSecondPassCallback.
+ * Move assignment operator initializing TracedGlobal from an existing one.
*/
- V8_INLINE void SetFinalizationCallback(
- void* parameter, WeakCallbackInfo<void>::Callback callback);
+ V8_INLINE TracedReference& operator=(TracedReference&& rhs);
- private:
- // Wrapping type used when clearing on destruction is required.
- struct WrappedForDestruction {
- T* value;
-
- explicit WrappedForDestruction(T* val) : value(val) {}
- ~WrappedForDestruction();
- operator T*() const { return value; }
- T* operator*() const { return value; }
- T* operator->() const { return value; }
- WrappedForDestruction& operator=(const WrappedForDestruction& other) {
- value = other.value;
- return *this;
- }
- WrappedForDestruction& operator=(T* val) {
- value = val;
- return *this;
- }
- };
+ /**
+ * Move assignment operator initializing TracedGlobal from an existing one.
+ */
+ template <class S>
+ V8_INLINE TracedReference& operator=(TracedReference<S>&& rhs);
- V8_INLINE static T* New(Isolate* isolate, T* that, void* slot);
+ /**
+ * Copy assignment operator initializing TracedGlobal from an existing one.
+ *
+ * Note: Prohibited when |other| has a finalization callback set through
+ * |SetFinalizationCallback|.
+ */
+ V8_INLINE TracedReference& operator=(const TracedReference& rhs);
- T* operator*() const { return this->val_; }
+ /**
+ * Copy assignment operator initializing TracedGlobal from an existing one.
+ *
+ * Note: Prohibited when |other| has a finalization callback set through
+ * |SetFinalizationCallback|.
+ */
+ template <class S>
+ V8_INLINE TracedReference& operator=(const TracedReference<S>& rhs);
- typename std::conditional<
- TracedGlobalTrait<TracedGlobal<T>>::kRequiresExplicitDestruction,
- WrappedForDestruction, T*>::type val_{nullptr};
+ /**
+ * If non-empty, destroy the underlying storage cell and create a new one with
+ * the contents of other if other is non empty
+ */
+ template <class S>
+ V8_INLINE void Reset(Isolate* isolate, const Local<S>& other);
- friend class EmbedderHeapTracer;
- template <typename F>
- friend class Local;
- friend class Object;
- template <typename F>
- friend class ReturnValue;
+ template <class S>
+ V8_INLINE TracedReference<S>& As() const {
+ return reinterpret_cast<TracedReference<S>&>(
+ const_cast<TracedReference<T>&>(*this));
+ }
};
/**
@@ -3640,8 +3761,9 @@ class V8_EXPORT Object : public Value {
return object.val_->InternalFieldCount();
}
- /** Same as above, but works for TracedGlobal. */
- V8_INLINE static int InternalFieldCount(const TracedGlobal<Object>& object) {
+ /** Same as above, but works for TracedReferenceBase. */
+ V8_INLINE static int InternalFieldCount(
+ const TracedReferenceBase<Object>& object) {
return object.val_->InternalFieldCount();
}
@@ -3666,7 +3788,7 @@ class V8_EXPORT Object : public Value {
/** Same as above, but works for TracedGlobal. */
V8_INLINE static void* GetAlignedPointerFromInternalField(
- const TracedGlobal<Object>& object, int index) {
+ const TracedReferenceBase<Object>& object, int index) {
return object.val_->GetAlignedPointerFromInternalField(index);
}
@@ -3956,7 +4078,7 @@ class ReturnValue {
template <typename S>
V8_INLINE void Set(const Global<S>& handle);
template <typename S>
- V8_INLINE void Set(const TracedGlobal<S>& handle);
+ V8_INLINE void Set(const TracedReferenceBase<S>& handle);
template <typename S>
V8_INLINE void Set(const Local<S> handle);
// Fast primitive setters
@@ -7376,7 +7498,8 @@ class V8_EXPORT EmbedderHeapTracer {
class V8_EXPORT TracedGlobalHandleVisitor {
public:
virtual ~TracedGlobalHandleVisitor() = default;
- virtual void VisitTracedGlobalHandle(const TracedGlobal<Value>& value) = 0;
+ virtual void VisitTracedGlobalHandle(const TracedGlobal<Value>& handle) {}
+ virtual void VisitTracedReference(const TracedReference<Value>& handle) {}
};
/**
@@ -7414,7 +7537,7 @@ class V8_EXPORT EmbedderHeapTracer {
virtual void RegisterV8References(
const std::vector<std::pair<void*, void*> >& embedder_fields) = 0;
- void RegisterEmbedderReference(const TracedGlobal<v8::Value>& ref);
+ void RegisterEmbedderReference(const TracedReferenceBase<v8::Value>& ref);
/**
* Called at the beginning of a GC cycle.
@@ -7475,32 +7598,35 @@ class V8_EXPORT EmbedderHeapTracer {
*
* If this returns false, then V8 may decide that the object referred to by
* such a handle is reclaimed. In that case:
- * - No action is required if handles are used with destructors.
- * - When run without destructors (by specializing
- * |TracedGlobalTrait::kRequiresExplicitDestruction|) V8 calls
- * |ResetHandleInNonTracingGC|.
- *
- * Note that the |handle| is different from the |TracedGlobal<T>| handle that
- * the embedder holds for retaining the object. The embedder may use
- * |TracedGlobal<T>::WrapperClassId()| to distinguish cases where it wants
- * handles to be treated as roots from not being treated as roots.
+ * - No action is required if handles are used with destructors, i.e., by just
+ * using |TracedGlobal|.
+ * - When run without destructors, i.e., by using
+ * |TracedReference|, V8 calls |ResetHandleInNonTracingGC|.
+ *
+ * Note that the |handle| is different from the handle that the embedder holds
+ * for retaining the object. The embedder may use |WrapperClassId()| to
+ * distinguish cases where it wants handles to be treated as roots from not
+ * being treated as roots.
*/
virtual bool IsRootForNonTracingGC(
- const v8::TracedGlobal<v8::Value>& handle) {
- return true;
- }
+ const v8::TracedReference<v8::Value>& handle);
+ virtual bool IsRootForNonTracingGC(const v8::TracedGlobal<v8::Value>& handle);
/**
* Used in combination with |IsRootForNonTracingGC|. Called by V8 when an
* object that is backed by a handle is reclaimed by a non-tracing garbage
* collection. It is up to the embedder to reset the original handle.
*
- * Note that the |handle| is different from the |TracedGlobal<T>| handle that
- * the embedder holds for retaining the object. It is up to the embedder to
- * find the orignal |TracedGlobal<T>| handle via the object or class id.
+ * Note that the |handle| is different from the handle that the embedder holds
+ * for retaining the object. It is up to the embedder to find the original
+ * handle via the object or class id.
*/
virtual void ResetHandleInNonTracingGC(
- const v8::TracedGlobal<v8::Value>& handle) {}
+ const v8::TracedReference<v8::Value>& handle);
+ V8_DEPRECATE_SOON(
+ "Use TracedReference version when not requiring destructors.",
+ virtual void ResetHandleInNonTracingGC(
+ const v8::TracedGlobal<v8::Value>& handle));
/*
* Called by the embedder to immediately perform a full garbage collection.
@@ -9103,8 +9229,12 @@ class V8_EXPORT V8 {
template <class T>
friend class Maybe;
template <class T>
+ friend class TracedReferenceBase;
+ template <class T>
friend class TracedGlobal;
template <class T>
+ friend class TracedReference;
+ template <class T>
friend class WeakCallbackInfo;
template <class T> friend class Eternal;
template <class T> friend class PersistentBase;
@@ -9975,7 +10105,7 @@ Local<T> Local<T>::New(Isolate* isolate,
}
template <class T>
-Local<T> Local<T>::New(Isolate* isolate, const TracedGlobal<T>& that) {
+Local<T> Local<T>::New(Isolate* isolate, const TracedReferenceBase<T>& that) {
return New(isolate, that.val_);
}
@@ -10156,26 +10286,20 @@ Global<T>& Global<T>::operator=(Global<S
}
template <class T>
-TracedGlobal<T>::WrappedForDestruction::~WrappedForDestruction() {
- if (value == nullptr) return;
- V8::DisposeTracedGlobal(reinterpret_cast<internal::Address*>(value));
- value = nullptr;
-}
-
-template <class T>
-T* TracedGlobal<T>::New(Isolate* isolate, T* that, void* slot) {
+T* TracedReferenceBase<T>::New(Isolate* isolate, T* that, void* slot,
+ DestructionMode destruction_mode) {
if (that == nullptr) return nullptr;
internal::Address* p = reinterpret_cast<internal::Address*>(that);
return reinterpret_cast<T*>(V8::GlobalizeTracedReference(
reinterpret_cast<internal::Isolate*>(isolate), p,
reinterpret_cast<internal::Address*>(slot),
- TracedGlobalTrait<TracedGlobal<T>>::kRequiresExplicitDestruction));
+ destruction_mode == kWithDestructor));
}
template <class T>
-void TracedGlobal<T>::Reset() {
+void TracedReferenceBase<T>::Reset() {
if (IsEmpty()) return;
- V8::DisposeTracedGlobal(reinterpret_cast<internal::Address*>(**this));
+ V8::DisposeTracedGlobal(reinterpret_cast<internal::Address*>(val_));
val_ = nullptr;
}
@@ -10185,7 +10309,8 @@ void TracedGlobal<T>::Reset(Isolate* iso
TYPE_CHECK(T, S);
Reset();
if (other.IsEmpty()) return;
- this->val_ = New(isolate, other.val_, &val_);
+ this->val_ = this->New(isolate, other.val_, &this->val_,
+ TracedReferenceBase<T>::kWithDestructor);
}
template <class T>
@@ -10233,28 +10358,83 @@ TracedGlobal<T>& TracedGlobal<T>::operat
}
template <class T>
-void TracedGlobal<T>::SetWrapperClassId(uint16_t class_id) {
+template <class S>
+void TracedReference<T>::Reset(Isolate* isolate, const Local<S>& other) {
+ TYPE_CHECK(T, S);
+ Reset();
+ if (other.IsEmpty()) return;
+ this->val_ = this->New(isolate, other.val_, &this->val_,
+ TracedReferenceBase<T>::kWithoutDestructor);
+}
+
+template <class T>
+template <class S>
+TracedReference<T>& TracedReference<T>::operator=(TracedReference<S>&& rhs) {
+ TYPE_CHECK(T, S);
+ *this = std::move(rhs.template As<T>());
+ return *this;
+}
+
+template <class T>
+template <class S>
+TracedReference<T>& TracedReference<T>::operator=(
+ const TracedReference<S>& rhs) {
+ TYPE_CHECK(T, S);
+ *this = rhs.template As<T>();
+ return *this;
+}
+
+template <class T>
+TracedReference<T>& TracedReference<T>::operator=(TracedReference&& rhs) {
+ if (this != &rhs) {
+ this->Reset();
+ if (rhs.val_ != nullptr) {
+ this->val_ = rhs.val_;
+ V8::MoveTracedGlobalReference(
+ reinterpret_cast<internal::Address**>(&rhs.val_),
+ reinterpret_cast<internal::Address**>(&this->val_));
+ rhs.val_ = nullptr;
+ }
+ }
+ return *this;
+}
+
+template <class T>
+TracedReference<T>& TracedReference<T>::operator=(const TracedReference& rhs) {
+ if (this != &rhs) {
+ this->Reset();
+ if (rhs.val_ != nullptr) {
+ V8::CopyTracedGlobalReference(
+ reinterpret_cast<const internal::Address* const*>(&rhs.val_),
+ reinterpret_cast<internal::Address**>(&this->val_));
+ }
+ }
+ return *this;
+}
+
+template <class T>
+void TracedReferenceBase<T>::SetWrapperClassId(uint16_t class_id) {
typedef internal::Internals I;
if (IsEmpty()) return;
- internal::Address* obj = reinterpret_cast<internal::Address*>(**this);
+ internal::Address* obj = reinterpret_cast<internal::Address*>(val_);
uint8_t* addr = reinterpret_cast<uint8_t*>(obj) + I::kNodeClassIdOffset;
*reinterpret_cast<uint16_t*>(addr) = class_id;
}
template <class T>
-uint16_t TracedGlobal<T>::WrapperClassId() const {
+uint16_t TracedReferenceBase<T>::WrapperClassId() const {
typedef internal::Internals I;
if (IsEmpty()) return 0;
- internal::Address* obj = reinterpret_cast<internal::Address*>(**this);
+ internal::Address* obj = reinterpret_cast<internal::Address*>(val_);
uint8_t* addr = reinterpret_cast<uint8_t*>(obj) + I::kNodeClassIdOffset;
return *reinterpret_cast<uint16_t*>(addr);
}
template <class T>
-void TracedGlobal<T>::SetFinalizationCallback(
+void TracedReferenceBase<T>::SetFinalizationCallback(
void* parameter, typename WeakCallbackInfo<void>::Callback callback) {
- V8::SetFinalizationCallbackTraced(
- reinterpret_cast<internal::Address*>(**this), parameter, callback);
+ V8::SetFinalizationCallbackTraced(reinterpret_cast<internal::Address*>(val_),
+ parameter, callback);
}
template <typename T>
@@ -10273,12 +10453,12 @@ void ReturnValue<T>::Set(const Global<S>
template <typename T>
template <typename S>
-void ReturnValue<T>::Set(const TracedGlobal<S>& handle) {
+void ReturnValue<T>::Set(const TracedReferenceBase<S>& handle) {
TYPE_CHECK(T, S);
if (V8_UNLIKELY(handle.IsEmpty())) {
*value_ = GetDefaultValue();
} else {
- *value_ = *reinterpret_cast<internal::Address*>(*handle);
+ *value_ = *reinterpret_cast<internal::Address*>(handle.val_);
}
}
diff -up chromium-78.0.3904.70/v8/src/api/api.cc.implement-tracedreference chromium-78.0.3904.70/v8/src/api/api.cc
--- chromium-78.0.3904.70/v8/src/api/api.cc.implement-tracedreference 2019-10-24 09:18:56.712105100 -0400
+++ chromium-78.0.3904.70/v8/src/api/api.cc 2019-10-24 09:20:17.428555637 -0400
@@ -10346,11 +10346,12 @@ void EmbedderHeapTracer::DecreaseAllocat
}
void EmbedderHeapTracer::RegisterEmbedderReference(
- const TracedGlobal<v8::Value>& ref) {
+ const TracedReferenceBase<v8::Value>& ref) {
if (ref.IsEmpty()) return;
i::Heap* const heap = reinterpret_cast<i::Isolate*>(isolate_)->heap();
- heap->RegisterExternallyReferencedObject(reinterpret_cast<i::Address*>(*ref));
+ heap->RegisterExternallyReferencedObject(
+ reinterpret_cast<i::Address*>(ref.val_));
}
void EmbedderHeapTracer::IterateTracedGlobalHandles(
@@ -10360,6 +10361,26 @@ void EmbedderHeapTracer::IterateTracedGl
isolate->global_handles()->IterateTracedNodes(visitor);
}
+bool EmbedderHeapTracer::IsRootForNonTracingGC(
+ const v8::TracedReference<v8::Value>& handle) {
+ return true;
+}
+
+bool EmbedderHeapTracer::IsRootForNonTracingGC(
+ const v8::TracedGlobal<v8::Value>& handle) {
+ return true;
+}
+
+void EmbedderHeapTracer::ResetHandleInNonTracingGC(
+ const v8::TracedReference<v8::Value>& handle) {
+ UNREACHABLE();
+}
+
+void EmbedderHeapTracer::ResetHandleInNonTracingGC(
+ const v8::TracedGlobal<v8::Value>& handle) {
+ UNREACHABLE();
+}
+
namespace internal {
const size_t HandleScopeImplementer::kEnteredContextsOffset =
diff -up chromium-78.0.3904.70/v8/src/handles/global-handles.cc.implement-tracedreference chromium-78.0.3904.70/v8/src/handles/global-handles.cc
--- chromium-78.0.3904.70/v8/src/handles/global-handles.cc.implement-tracedreference 2019-10-24 09:20:39.954123225 -0400
+++ chromium-78.0.3904.70/v8/src/handles/global-handles.cc 2019-10-24 09:21:45.911857072 -0400
@@ -901,8 +901,13 @@ void GlobalHandles::IdentifyWeakUnmodifi
DCHECK(node->is_root());
if (is_unmodified(node->location())) {
v8::Value* value = ToApi<v8::Value>(node->handle());
- node->set_root(tracer->IsRootForNonTracingGC(
- *reinterpret_cast<v8::TracedGlobal<v8::Value>*>(&value)));
+ if (node->has_destructor()) {
+ node->set_root(tracer->IsRootForNonTracingGC(
+ *reinterpret_cast<v8::TracedGlobal<v8::Value>*>(&value)));
+ } else {
+ node->set_root(tracer->IsRootForNonTracingGC(
+ *reinterpret_cast<v8::TracedReference<v8::Value>*>(&value)));
+ }
}
}
}
@@ -990,7 +995,7 @@ void GlobalHandles::IterateYoungWeakUnmo
} else {
v8::Value* value = ToApi<v8::Value>(node->handle());
tracer->ResetHandleInNonTracingGC(
- *reinterpret_cast<v8::TracedGlobal<v8::Value>*>(&value));
+ *reinterpret_cast<v8::TracedReference<v8::Value>*>(&value));
DCHECK(!node->IsInUse());
}
@@ -1271,8 +1276,13 @@ void GlobalHandles::IterateTracedNodes(
for (TracedNode* node : *traced_nodes_) {
if (node->IsInUse()) {
v8::Value* value = ToApi<v8::Value>(node->handle());
- visitor->VisitTracedGlobalHandle(
- *reinterpret_cast<v8::TracedGlobal<v8::Value>*>(&value));
+ if (node->has_destructor()) {
+ visitor->VisitTracedGlobalHandle(
+ *reinterpret_cast<v8::TracedGlobal<v8::Value>*>(&value));
+ } else {
+ visitor->VisitTracedReference(
+ *reinterpret_cast<v8::TracedReference<v8::Value>*>(&value));
+ }
}
}
}
diff -up chromium-78.0.3904.70/v8/src/heap/embedder-tracing.h.implement-tracedreference chromium-78.0.3904.70/v8/src/heap/embedder-tracing.h
--- chromium-78.0.3904.70/v8/src/heap/embedder-tracing.h.implement-tracedreference 2019-10-24 09:22:03.664519559 -0400
+++ chromium-78.0.3904.70/v8/src/heap/embedder-tracing.h 2019-10-24 09:22:45.197729964 -0400
@@ -57,7 +57,12 @@ class V8_EXPORT_PRIVATE LocalEmbedderHea
bool IsRootForNonTracingGC(const v8::TracedGlobal<v8::Value>& handle) {
return !InUse() || remote_tracer_->IsRootForNonTracingGC(handle);
}
- void ResetHandleInNonTracingGC(const v8::TracedGlobal<v8::Value>& handle) {
+
+ bool IsRootForNonTracingGC(const v8::TracedReference<v8::Value>& handle) {
+ return !InUse() || remote_tracer_->IsRootForNonTracingGC(handle);
+ }
+
+ void ResetHandleInNonTracingGC(const v8::TracedReference<v8::Value>& handle) {
// Resetting is only called when IsRootForNonTracingGC returns false which
// can only happen the EmbedderHeapTracer is set on API level.
DCHECK(InUse());