electron/patches/chromium/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 210760801f1d027196111631d34bab3eb5a10792..cdfdf91841b5f2feb248b0c5890ddcfdb5a8f9ce 100644
--- a/gin/array_buffer.cc
+++ b/gin/array_buffer.cc
@@ -37,6 +37,10 @@ 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 086371af29bd8c7520485125deddca411e8b978b..2c6886ddcc47019be4d552d4fddfc1c3d00cbca0 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 056108a5a6f795d3971e1e808bbefe1058e3c512..50965d4f30b6ae233dab18d0a86f520bf1df8b10 100644
--- a/third_party/blink/renderer/bindings/core/v8/v8_initializer.cc
+++ b/third_party/blink/renderer/bindings/core/v8/v8_initializer.cc
@@ -704,6 +704,10 @@ class ArrayBufferAllocator : public v8::ArrayBuffer::Allocator {
     return result;
   }
 
+  void* Realloc(void* data, size_t size) override {
+    return ArrayBufferContents::Realloc(data, size);
+  }
+
   void Free(void* data, size_t size) override {
     if (max_allocation_ != 0 && data)
       total_allocation_.fetch_sub(size, std::memory_order_relaxed);
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 686806bcafa0939d29bbc6775748a115130feb96..20f7a9a594cf379b2dac6970bc8c02aebc3be360 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
@@ -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 WTF::Partitions::ArrayBufferPartition()->Realloc(data, size,
+      WTF_HEAP_PROFILER_TYPE_NAME(ArrayBufferContents));
+}
+
 void ArrayBufferContents::FreeMemory(void* data) {
   InstanceCounters::DecrementCounter(
       InstanceCounters::kArrayBufferContentsCounter);
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: