From 578227d83be60981088e7e3ff85c6e071fa534f3 Mon Sep 17 00:00:00 2001
From: Dan Caspi <danca@fb.com>
Date: Wed, 31 May 2017 11:04:00 -0700
Subject: [PATCH] Adding the ability to run GC on a different thread than the
 one JSContext was created in

Reviewed By: javache

Differential Revision: D5121232

fbshipit-source-id: 28df89271c9d3f421ca27cf309ca0d3c756beba2
---
 ReactCommon/jschelpers/JSCWrapper.h         | 2 ++
 ReactCommon/jschelpers/JavaScriptCore.h     | 3 ++-
 ReactCommon/jschelpers/systemJSCWrapper.cpp | 5 +++++
 3 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/ReactCommon/jschelpers/JSCWrapper.h b/ReactCommon/jschelpers/JSCWrapper.h
index aa40537841..95eb6e9cdb 100644
--- a/ReactCommon/jschelpers/JSCWrapper.h
+++ b/ReactCommon/jschelpers/JSCWrapper.h
@@ -37,6 +37,7 @@ JSC_IMPORT JSValueRef JSEvaluateBytecodeBundle(JSContextRef, JSObjectRef, int, J
 JSC_IMPORT bool JSSamplingProfilerEnabled();
 JSC_IMPORT void JSStartSamplingProfilingOnMainJSCThread(JSGlobalContextRef);
 JSC_IMPORT JSValueRef JSPokeSamplingProfiler(JSContextRef);
+JSC_IMPORT void FBJSContextStartGCTimers(JSContextRef);
 
 #if defined(__APPLE__)
 #import <objc/objc.h>
@@ -64,6 +65,7 @@ struct JSCWrapper {
   // JSContext
   JSC_WRAPPER_METHOD(JSContextGetGlobalContext);
   JSC_WRAPPER_METHOD(JSContextGetGlobalObject);
+  JSC_WRAPPER_METHOD(FBJSContextStartGCTimers);
 
   // JSEvaluate
   JSC_WRAPPER_METHOD(JSEvaluateScript);
diff --git a/ReactCommon/jschelpers/JavaScriptCore.h b/ReactCommon/jschelpers/JavaScriptCore.h
index 737cf828c2..076386b57e 100644
--- a/ReactCommon/jschelpers/JavaScriptCore.h
+++ b/ReactCommon/jschelpers/JavaScriptCore.h
@@ -75,8 +75,9 @@ jsc_poison(JSContextGroupCreate JSContextGroupRelease JSContextGroupRetain
 // JSContext
 #define JSC_JSContextGetGlobalContext(...) __jsc_wrapper(JSContextGetGlobalContext, __VA_ARGS__)
 #define JSC_JSContextGetGlobalObject(...) __jsc_wrapper(JSContextGetGlobalObject, __VA_ARGS__)
+#define JSC_FBJSContextStartGCTimers(...) __jsc_wrapper(FBJSContextStartGCTimers, __VA_ARGS__)
 
-jsc_poison(JSContextGetGlobalContext JSContextGetGlobalObject JSContextGetGroup)
+jsc_poison(JSContextGetGlobalContext JSContextGetGlobalObject JSContextGetGroup FBJSContextStartGCTimers)
 
 // JSEvaluate
 #define JSC_JSEvaluateScript(...) __jsc_wrapper(JSEvaluateScript, __VA_ARGS__)
diff --git a/ReactCommon/jschelpers/systemJSCWrapper.cpp b/ReactCommon/jschelpers/systemJSCWrapper.cpp
index 142726bcd6..4b04a43cbb 100644
--- a/ReactCommon/jschelpers/systemJSCWrapper.cpp
+++ b/ReactCommon/jschelpers/systemJSCWrapper.cpp
@@ -33,6 +33,8 @@ UNIMPLEMENTED_SYSTEM_JSC_FUNCTION(JSInspectorGetInstance)
 
 UNIMPLEMENTED_SYSTEM_JSC_FUNCTION(configureJSCForIOS)
 
+UNIMPLEMENTED_SYSTEM_JSC_FUNCTION(FBJSContextStartGCTimers)
+
 bool JSSamplingProfilerEnabled() {
   return false;
 }
@@ -56,6 +58,9 @@ const JSCWrapper* systemJSCWrapper() {
 
       .JSContextGetGlobalContext = JSContextGetGlobalContext,
       .JSContextGetGlobalObject = JSContextGetGlobalObject,
+      .FBJSContextStartGCTimers =
+        (decltype(&FBJSContextStartGCTimers))
+        Unimplemented_FBJSContextStartGCTimers,
 
       .JSEvaluateScript = JSEvaluateScript,
       .JSEvaluateBytecodeBundle =