add_realloc.patch

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 a02797e94f61e8c71428633a4585a625dc5aadbd..305b7d307d233af699e3f495f85de0f8097ff311 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 f2d49df56a524fd1cc76623ec76fc7059957d476..bcb437fe328ccb95446ed0b8525017118546d41e 100644
--- a/third_party/blink/renderer/bindings/core/v8/v8_initializer.cc
+++ b/third_party/blink/renderer/bindings/core/v8/v8_initializer.cc
@@ -648,6 +648,10 @@ class ArrayBufferAllocator : public v8::ArrayBuffer::Allocator {
         size, WTF::ArrayBufferContents::kDontInitialize);
   }
 
+  void* Realloc(void* data, size_t size) override {
+    return WTF::ArrayBufferContents::Realloc(data, size);
+  }
+
   void Free(void* data, size_t size) override {
     WTF::ArrayBufferContents::FreeMemory(data);
   }
diff --git a/third_party/blink/renderer/platform/wtf/typed_arrays/array_buffer_contents.cc b/third_party/blink/renderer/platform/wtf/typed_arrays/array_buffer_contents.cc
index 8cd9b210bdb16fca7935b44dbc42829e1d193643..5c8ccbcc27a0ed6cc3a3b717f3336ddee4e82c0a 100644
--- a/third_party/blink/renderer/platform/wtf/typed_arrays/array_buffer_contents.cc
+++ b/third_party/blink/renderer/platform/wtf/typed_arrays/array_buffer_contents.cc
@@ -127,6 +127,11 @@ void* ArrayBufferContents::AllocateMemoryOrNull(size_t size,
   return AllocateMemoryWithFlags(size, policy, base::PartitionAllocReturnNull);
 }
 
+void* ArrayBufferContents::Realloc(void* data, size_t size) {
+  return Partitions::ArrayBufferPartition()->Realloc(data, size,
+      WTF_HEAP_PROFILER_TYPE_NAME(ArrayBufferContents));
+}
+
 void ArrayBufferContents::FreeMemory(void* data) {
   Partitions::ArrayBufferPartition()->Free(data);
 }
diff --git a/third_party/blink/renderer/platform/wtf/typed_arrays/array_buffer_contents.h b/third_party/blink/renderer/platform/wtf/typed_arrays/array_buffer_contents.h
index 841e87c219e5d3c66bd3394a63bcfa13bf34640a..b47a6794febf699eef36505a2f0540ec542bd155 100644
--- a/third_party/blink/renderer/platform/wtf/typed_arrays/array_buffer_contents.h
+++ b/third_party/blink/renderer/platform/wtf/typed_arrays/array_buffer_contents.h
@@ -150,6 +150,7 @@ class WTF_EXPORT ArrayBufferContents {
   void CopyTo(ArrayBufferContents& other);
 
   static void* AllocateMemoryOrNull(size_t, InitializationPolicy);
+  static void* Realloc(void* data, size_t);
   static void FreeMemory(void*);
   static DataHandle CreateDataHandle(size_t, InitializationPolicy);