From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Samuel Attard <samuel.r.attard@gmail.com>
Date: Tue, 3 Nov 2020 16:49:32 -0800
Subject: export gin::V8Platform::PageAllocator for usage outside of the gin
 platform

In order for memory allocation in the main process node environment to be
correctly tagged with MAP_JIT we need to use gins page allocator instead
of the default V8 allocator.  This probably can't be usptreamed.

diff --git a/gin/public/v8_platform.h b/gin/public/v8_platform.h
index cec5e3b283343586ba846a4ce58fee34e8542164..09ec66b75113d6a934d51ee5aad684281be61e8f 100644
--- a/gin/public/v8_platform.h
+++ b/gin/public/v8_platform.h
@@ -32,6 +32,7 @@ class GIN_EXPORT V8Platform : public v8::Platform {
   // enabling Arm's Branch Target Instructions for executable pages. This is
   // verified in the tests for gin::PageAllocator.
   PageAllocator* GetPageAllocator() override;
+  static PageAllocator* GetCurrentPageAllocator();
 #if BUILDFLAG(ENABLE_THREAD_ISOLATION)
   ThreadIsolatedAllocator* GetThreadIsolatedAllocator() override;
 #endif
diff --git a/gin/v8_platform.cc b/gin/v8_platform.cc
index 3e21c6487268141f08cf308da90a3dd79fd4d6f0..d8e87ffdf7891b20a22d317655f4eaa45a371b5e 100644
--- a/gin/v8_platform.cc
+++ b/gin/v8_platform.cc
@@ -338,6 +338,10 @@ ThreadIsolatedAllocator* V8Platform::GetThreadIsolatedAllocator() {
 }
 #endif  // BUILDFLAG(ENABLE_THREAD_ISOLATION)
 
+PageAllocator* V8Platform::GetCurrentPageAllocator() {
+  return g_page_allocator.Pointer();
+}
+
 void V8Platform::OnCriticalMemoryPressure() {
 // We only have a reservation on 32-bit Windows systems.
 // TODO(bbudge) Make the #if's in BlinkInitializer match.
