From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Shelley Vohr <shelley.vohr@gmail.com>
Date: Thu, 20 Sep 2018 17:44:26 -0700
Subject: add_realloc.patch

Blink overrides ArrayBuffer's allocator with its own one, while Node simply
uses malloc and free, so we need to use v8's allocator in Node. As part of the
10.6.0 upgrade, we needed to make SerializerDelegate accept an allocator
argument in its constructor, and override ReallocateBufferMemory and
FreeBufferMemory to use the allocator. We cannot simply allocate and then memcpy
when we override ReallocateBufferMemory, so we therefore need to implement
Realloc on the v8 side and correspondingly in gin.

diff --git a/gin/array_buffer.cc b/gin/array_buffer.cc
index b94a71ef856f92404e16544e22ebbadf57cff363..b15685f6907bcafeb1acd62bfe76f0713dea27f3 100644
--- a/gin/array_buffer.cc
+++ b/gin/array_buffer.cc
@@ -43,6 +43,10 @@ void* ArrayBufferAllocator::AllocateUninitialized(size_t length) {
   return malloc(length);
 }
 
+void* ArrayBufferAllocator::Realloc(void* data, size_t length) {
+  return realloc(data, length);
+}
+
 void ArrayBufferAllocator::Free(void* data, size_t length) {
   free(data);
 }
diff --git a/gin/array_buffer.h b/gin/array_buffer.h
index 2aef366ac8194aa261cbca6abc051f7da8a988d3..3c7d66c81032636abcca4f1538ce9b7f4ddb2de2 100644
--- a/gin/array_buffer.h
+++ b/gin/array_buffer.h
@@ -21,6 +21,7 @@ class ArrayBufferAllocator : public v8::ArrayBuffer::Allocator {
  public:
   void* Allocate(size_t length) override;
   void* AllocateUninitialized(size_t length) override;
+  void* Realloc(void* data, size_t length) override;
   void Free(void* data, size_t length) override;
 
   GIN_EXPORT static ArrayBufferAllocator* SharedInstance();
diff --git a/third_party/blink/renderer/bindings/core/v8/v8_initializer.cc b/third_party/blink/renderer/bindings/core/v8/v8_initializer.cc
index 696a6170a584c1bb71c8ad253963d9f64395a13e..9677aa931cd543adfc1e9844d6afee8dcb0f4c2d 100644
--- a/third_party/blink/renderer/bindings/core/v8/v8_initializer.cc
+++ b/third_party/blink/renderer/bindings/core/v8/v8_initializer.cc
@@ -661,6 +661,10 @@ class ArrayBufferAllocator : public v8::ArrayBuffer::Allocator {
         size, ArrayBufferContents::kDontInitialize);
   }
 
+  void* Realloc(void* data, size_t size) override {
+    return ArrayBufferContents::Realloc(data, size);
+  }
+
   void Free(void* data, size_t size) override {
     ArrayBufferContents::FreeMemory(data);
   }
diff --git a/third_party/blink/renderer/core/typed_arrays/array_buffer/array_buffer_contents.cc b/third_party/blink/renderer/core/typed_arrays/array_buffer/array_buffer_contents.cc
index 095ca3db051362319611976b9052725ab16c1b3a..13e802a5732f0b04832d6dd8031ae43e1240b79a 100644
--- a/third_party/blink/renderer/core/typed_arrays/array_buffer/array_buffer_contents.cc
+++ b/third_party/blink/renderer/core/typed_arrays/array_buffer/array_buffer_contents.cc
@@ -126,6 +126,11 @@ void* ArrayBufferContents::AllocateMemoryOrNull(size_t size,
   return AllocateMemoryWithFlags(size, policy, base::PartitionAllocReturnNull);
 }
 
+void* ArrayBufferContents::Realloc(void* data, size_t size) {
+  return WTF::Partitions::ArrayBufferPartition()->Realloc(data, size,
+      WTF_HEAP_PROFILER_TYPE_NAME(ArrayBufferContents));
+}
+
 void ArrayBufferContents::FreeMemory(void* data) {
   WTF::Partitions::ArrayBufferPartition()->Free(data);
 }
diff --git a/third_party/blink/renderer/core/typed_arrays/array_buffer/array_buffer_contents.h b/third_party/blink/renderer/core/typed_arrays/array_buffer/array_buffer_contents.h
index cce802e4fc94c258607bc943d9902e6d18173c44..4f7f4eaf005aac701360e567e6faca7f2e0ff3da 100644
--- a/third_party/blink/renderer/core/typed_arrays/array_buffer/array_buffer_contents.h
+++ b/third_party/blink/renderer/core/typed_arrays/array_buffer/array_buffer_contents.h
@@ -108,6 +108,7 @@ class CORE_EXPORT ArrayBufferContents {
   void CopyTo(ArrayBufferContents& other);
 
   static void* AllocateMemoryOrNull(size_t, InitializationPolicy);
+  static void* Realloc(void* data, size_t);
   static void FreeMemory(void*);
 
  private:
