deps: patch the V8 API to be forward compatible with 6.7

common.gypi

@@ -27,7 +27,7 @@
 
     # Reset this number to 0 on major V8 upgrades.
     # Increment by one for each non-official patch applied to deps/v8.
-    'v8_embedder_string': '-node.2',
+    'v8_embedder_string': '-node.3',
 
     # Enable disassembler for `--print-code` v8 options
     'v8_enable_disassembler': 1,

deps/v8/include/libplatform/libplatform.h

@@ -38,7 +38,7 @@ V8_PLATFORM_EXPORT std::unique_ptr<v8::Platform> NewDefaultPlatform(
     int thread_pool_size = 0,
     IdleTaskSupport idle_task_support = IdleTaskSupport::kDisabled,
     InProcessStackDumping in_process_stack_dumping =
-        InProcessStackDumping::kEnabled,
+        InProcessStackDumping::kDisabled,
     std::unique_ptr<v8::TracingController> tracing_controller = {});
 
 V8_PLATFORM_EXPORT V8_DEPRECATE_SOON(
@@ -47,7 +47,7 @@ V8_PLATFORM_EXPORT V8_DEPRECATE_SOON(
         int thread_pool_size = 0,
         IdleTaskSupport idle_task_support = IdleTaskSupport::kDisabled,
         InProcessStackDumping in_process_stack_dumping =
-            InProcessStackDumping::kEnabled,
+            InProcessStackDumping::kDisabled,
         v8::TracingController* tracing_controller = nullptr));
 
 /**

deps/v8/include/v8-platform.h

@@ -5,11 +5,14 @@
 #ifndef V8_V8_PLATFORM_H_
 #define V8_V8_PLATFORM_H_
 
+#include <cstdlib>
 #include <stddef.h>
 #include <stdint.h>
 #include <memory>
 #include <string>
 
+#include "v8config.h"  // NOLINT(build/include)
+
 namespace v8 {
 
 class Isolate;
@@ -285,14 +288,23 @@ class Platform {
    */
   virtual bool OnCriticalMemoryPressure(size_t length) { return false; }
 
+  virtual int NumberOfWorkerThreads() {
+    return static_cast<int>(NumberOfAvailableBackgroundThreads());
+  }
+
   /**
    * Gets the number of threads that are used to execute background tasks. Is
    * used to estimate the number of tasks a work package should be split into.
    * A return value of 0 means that there are no background threads available.
    * Note that a value of 0 won't prohibit V8 from posting tasks using
    * |CallOnBackgroundThread|.
    */
-  virtual size_t NumberOfAvailableBackgroundThreads() { return 0; }
+  V8_DEPRECATE_SOON(
+      "NumberOfAvailableBackgroundThreads() is deprecated, use "
+      "NumberOfAvailableBackgroundThreads() instead.",
+      virtual size_t NumberOfAvailableBackgroundThreads()) {
+    return 0;
+  }
 
   /**
    * Returns a TaskRunner which can be used to post a task on the foreground.
@@ -309,11 +321,28 @@ class Platform {
    * Returns a TaskRunner which can be used to post a task on a background.
    * This function should only be called from a foreground thread.
    */
-  virtual std::shared_ptr<v8::TaskRunner> GetBackgroundTaskRunner(
+  V8_DEPRECATE_SOON(
+      "GetBackgroundTaskRunner() is deprecated, use "
+      "GetWorkerThreadsTaskRunner() "
+      "instead.",
+      virtual std::shared_ptr<v8::TaskRunner> GetBackgroundTaskRunner(
+          Isolate* isolate)) {
+    // TODO(gab): Remove this method when all embedders have moved to
+    // GetWorkerThreadsTaskRunner().
+
+    // An implementation needs to be provided here because this is called by the
+    // default GetWorkerThreadsTaskRunner() implementation below. In practice
+    // however, all code either:
+    //  - Overrides GetWorkerThreadsTaskRunner() (thus not making this call) --
+    //    i.e. all v8 code.
+    //  - Overrides this method (thus not making this call) -- i.e. all
+    //    unadapted embedders.
+    abort();
+  }
+
+  virtual std::shared_ptr<v8::TaskRunner> GetWorkerThreadsTaskRunner(
       Isolate* isolate) {
-    // TODO(ahaas): Make this function abstract after it got implemented on all
-    // platforms.
-    return {};
+    return GetBackgroundTaskRunner(isolate);
   }
 
   /**
@@ -323,8 +352,28 @@ class Platform {
    * of tasks wrt order of scheduling, nor is there a guarantee about the
    * thread the task will be run on.
    */
-  virtual void CallOnBackgroundThread(Task* task,
-                                      ExpectedRuntime expected_runtime) = 0;
+  V8_DEPRECATE_SOON(
+      "ExpectedRuntime is deprecated, use CallOnWorkerThread() instead.",
+      virtual void CallOnBackgroundThread(Task* task,
+                                          ExpectedRuntime expected_runtime)) {
+    // An implementation needs to be provided here because this is called by the
+    // default implementation below. In practice however, all code either:
+    //  - Overrides the new method (thus not making this call) -- i.e. all v8
+    //    code.
+    //  - Overrides this method (thus not making this call) -- i.e. all
+    //    unadapted embedders.
+    abort();
+  }
+
+  virtual void CallOnWorkerThread(std::unique_ptr<Task> task) {
+    CallOnBackgroundThread(task.release(), kShortRunningTask);
+  }
+
+  virtual void CallBlockingTaskOnWorkerThread(std::unique_ptr<Task> task) {
+    // Embedders may optionally override this to process these tasks in a high
+    // priority pool.
+    CallOnWorkerThread(std::move(task));
+  }
 
   /**
    * Schedules a task to be invoked on a foreground thread wrt a specific

deps/v8/include/v8.h

@@ -1567,7 +1567,9 @@ class V8_EXPORT ScriptCompiler {
   static V8_WARN_UNUSED_RESULT MaybeLocal<Function> CompileFunctionInContext(
       Local<Context> context, Source* source, size_t arguments_count,
       Local<String> arguments[], size_t context_extension_count,
-      Local<Object> context_extensions[]);
+      Local<Object> context_extensions[],
+      CompileOptions options = kNoCompileOptions,
+      NoCacheReason no_cache_reason = kNoCacheNoReason);
 
   /**
    * Creates and returns code cache for the specified unbound_script.
@@ -1641,7 +1643,7 @@ class V8_EXPORT Message {
    * Returns the index within the line of the first character where
    * the error occurred.
    */
-  V8_DEPRECATED("Use maybe version", int GetStartColumn() const);
+  int GetStartColumn() const;
   V8_WARN_UNUSED_RESULT Maybe<int> GetStartColumn(Local<Context> context) const;
 
   /**
@@ -3070,6 +3072,8 @@ enum PropertyFilter {
   SKIP_SYMBOLS = 16
 };
 
+enum class SideEffectType { kHasSideEffect, kHasNoSideEffect };
+
 /**
  * Keys/Properties filter enums:
  *
@@ -3202,13 +3206,12 @@ class V8_EXPORT Object : public Value {
   V8_WARN_UNUSED_RESULT Maybe<bool> Delete(Local<Context> context,
                                            uint32_t index);
 
-  V8_WARN_UNUSED_RESULT Maybe<bool> SetAccessor(Local<Context> context,
-                          Local<Name> name,
-                          AccessorNameGetterCallback getter,
-                          AccessorNameSetterCallback setter = 0,
-                          MaybeLocal<Value> data = MaybeLocal<Value>(),
-                          AccessControl settings = DEFAULT,
-                          PropertyAttribute attribute = None);
+  V8_WARN_UNUSED_RESULT Maybe<bool> SetAccessor(
+      Local<Context> context, Local<Name> name,
+      AccessorNameGetterCallback getter, AccessorNameSetterCallback setter = 0,
+      MaybeLocal<Value> data = MaybeLocal<Value>(),
+      AccessControl settings = DEFAULT, PropertyAttribute attribute = None,
+      SideEffectType getter_side_effect_type = SideEffectType::kHasSideEffect);
 
   void SetAccessorProperty(Local<Name> name, Local<Function> getter,
                            Local<Function> setter = Local<Function>(),
@@ -3223,7 +3226,8 @@ class V8_EXPORT Object : public Value {
       Local<Context> context, Local<Name> name,
       AccessorNameGetterCallback getter,
       AccessorNameSetterCallback setter = nullptr,
-      Local<Value> data = Local<Value>(), PropertyAttribute attributes = None);
+      Local<Value> data = Local<Value>(), PropertyAttribute attributes = None,
+      SideEffectType getter_side_effect_type = SideEffectType::kHasSideEffect);
 
   /**
    * Attempts to create a property with the given name which behaves like a data
@@ -3236,7 +3240,8 @@ class V8_EXPORT Object : public Value {
   V8_WARN_UNUSED_RESULT Maybe<bool> SetLazyDataProperty(
       Local<Context> context, Local<Name> name,
       AccessorNameGetterCallback getter, Local<Value> data = Local<Value>(),
-      PropertyAttribute attributes = None);
+      PropertyAttribute attributes = None,
+      SideEffectType getter_side_effect_type = SideEffectType::kHasSideEffect);
 
   /**
    * Functionality for private properties.
@@ -3491,7 +3496,7 @@ class V8_EXPORT Object : public Value {
   /**
    * Return the isolate to which the Object belongs to.
    */
-  V8_DEPRECATE_SOON("Keep track of isolate correctly", Isolate* GetIsolate());
+  Isolate* GetIsolate();
 
   static Local<Object> New(Isolate* isolate);
 
@@ -3828,7 +3833,8 @@ class V8_EXPORT Function : public Object {
   static MaybeLocal<Function> New(
       Local<Context> context, FunctionCallback callback,
       Local<Value> data = Local<Value>(), int length = 0,
-      ConstructorBehavior behavior = ConstructorBehavior::kAllow);
+      ConstructorBehavior behavior = ConstructorBehavior::kAllow,
+      SideEffectType side_effect_type = SideEffectType::kHasSideEffect);
   static V8_DEPRECATE_SOON(
       "Use maybe version",
       Local<Function> New(Isolate* isolate, FunctionCallback callback,
@@ -4266,13 +4272,6 @@ class V8_EXPORT ArrayBuffer : public Object {
      */
     virtual void* AllocateUninitialized(size_t length) = 0;
 
-    /**
-     * Reserved |length| bytes, but do not commit the memory. Must call
-     * |SetProtection| to make memory accessible.
-     */
-    // TODO(eholk): make this pure virtual once blink implements this.
-    virtual void* Reserve(size_t length);
-
     /**
      * Free the memory block of size |length|, pointed to by |data|.
      * That memory is guaranteed to be previously allocated by |Allocate|.
@@ -4281,27 +4280,6 @@ class V8_EXPORT ArrayBuffer : public Object {
 
     enum class AllocationMode { kNormal, kReservation };
 
-    /**
-     * Free the memory block of size |length|, pointed to by |data|.
-     * That memory is guaranteed to be previously allocated by |Allocate| or
-     * |Reserve|, depending on |mode|.
-     */
-    // TODO(eholk): make this pure virtual once blink implements this.
-    virtual void Free(void* data, size_t length, AllocationMode mode);
-
-    enum class Protection { kNoAccess, kReadWrite };
-
-    /**
-     * Change the protection on a region of memory.
-     *
-     * On platforms that make a distinction between reserving and committing
-     * memory, changing the protection to kReadWrite must also ensure the memory
-     * is committed.
-     */
-    // TODO(eholk): make this pure virtual once blink implements this.
-    virtual void SetProtection(void* data, size_t length,
-                               Protection protection);
-
     /**
      * malloc/free based convenience allocator.
      *
@@ -5491,7 +5469,8 @@ class V8_EXPORT FunctionTemplate : public Template {
       Isolate* isolate, FunctionCallback callback = 0,
       Local<Value> data = Local<Value>(),
       Local<Signature> signature = Local<Signature>(), int length = 0,
-      ConstructorBehavior behavior = ConstructorBehavior::kAllow);
+      ConstructorBehavior behavior = ConstructorBehavior::kAllow,
+      SideEffectType side_effect_type = SideEffectType::kHasSideEffect);
 
   /** Get a template included in the snapshot by index. */
   static MaybeLocal<FunctionTemplate> FromSnapshot(Isolate* isolate,
@@ -5503,7 +5482,8 @@ class V8_EXPORT FunctionTemplate : public Template {
   static Local<FunctionTemplate> NewWithCache(
       Isolate* isolate, FunctionCallback callback,
       Local<Private> cache_property, Local<Value> data = Local<Value>(),
-      Local<Signature> signature = Local<Signature>(), int length = 0);
+      Local<Signature> signature = Local<Signature>(), int length = 0,
+      SideEffectType side_effect_type = SideEffectType::kHasSideEffect);
 
   /** Returns the unique function instance in the current execution context.*/
   V8_DEPRECATE_SOON("Use maybe version", Local<Function> GetFunction());
@@ -5524,8 +5504,9 @@ class V8_EXPORT FunctionTemplate : public Template {
    * callback is called whenever the function created from this
    * FunctionTemplate is called.
    */
-  void SetCallHandler(FunctionCallback callback,
-                      Local<Value> data = Local<Value>());
+  void SetCallHandler(
+      FunctionCallback callback, Local<Value> data = Local<Value>(),
+      SideEffectType side_effect_type = SideEffectType::kHasSideEffect);
 
   /** Set the predefined length property for the FunctionTemplate. */
   void SetLength(int length);
@@ -5823,7 +5804,7 @@ class V8_EXPORT ObjectTemplate : public Template {
    * \param data A piece of data that will be passed to the callbacks
    *   whenever they are invoked.
    */
-  V8_DEPRECATE_SOON(
+  V8_DEPRECATED(
       "Use SetHandler(const NamedPropertyHandlerConfiguration) "
       "with the kOnlyInterceptStrings flag set.",
       void SetNamedPropertyHandler(
@@ -6581,8 +6562,11 @@ struct JitCodeEvent {
   // statement, and is used to indicate possible break locations.
   enum PositionType { POSITION, STATEMENT_POSITION };
 
+  enum CodeType { BYTE_CODE, JIT_CODE };
+
   // Type of event.
   EventType type;
+  CodeType code_type;
   // Start of the instructions.
   void* code_start;
   // Size of the instructions.
@@ -8020,7 +8004,8 @@ class V8_EXPORT V8 {
    * Enable the default signal handler rather than using one provided by the
    * embedder.
    */
-  static bool RegisterDefaultSignalHandler();
+  V8_DEPRECATE_SOON("Use EnableWebAssemblyTrapHandler",
+                    static bool RegisterDefaultSignalHandler());
 
  private:
   V8();