Add jsc_heap_gc_like_ios.patch

Author: Kudo

patches/jsc_heap_gc_like_ios.patch

@@ -0,0 +1,58 @@
+--- download/webkit/Source/JavaScriptCore/heap/Heap.cpp	2019-09-17 23:35:30.000000000 +0800
++++ target/webkit/Source/JavaScriptCore/heap/Heap.cpp	2019-09-17 23:18:36.000000000 +0800
+@@ -88,7 +88,7 @@
+ #include <wtf/SimpleStats.h>
+ #include <wtf/Threading.h>
+ 
+-#if PLATFORM(IOS_FAMILY)
++#if PLATFORM(IOS_FAMILY) || defined(__ANDROID__)
+ #include <bmalloc/bmalloc.h>
+ #endif
+ 
+@@ -129,7 +129,7 @@
+     if (VM::isInMiniMode())
+         return Options::miniVMHeapGrowthFactor() * heapSize;
+ 
+-#if PLATFORM(IOS_FAMILY)
++#if PLATFORM(IOS_FAMILY) || defined(__ANDROID__)
+     size_t memoryFootprint = bmalloc::api::memoryFootprint();
+     if (memoryFootprint < ramSize * Options::smallHeapRAMFraction())
+         return Options::smallHeapGrowthFactor() * heapSize;
+@@ -538,7 +538,7 @@
+ 
+ bool Heap::overCriticalMemoryThreshold(MemoryThresholdCallType memoryThresholdCallType)
+ {
+-#if PLATFORM(IOS_FAMILY)
++#if PLATFORM(IOS_FAMILY) || defined(__ANDROID__)
+     if (memoryThresholdCallType == MemoryThresholdCallType::Direct || ++m_precentAvailableMemoryCachedCallCount >= 100) {
+         m_overCriticalMemoryThreshold = bmalloc::api::percentAvailableMemoryInUse() > Options::criticalGCMemoryThreshold();
+         m_precentAvailableMemoryCachedCallCount = 0;
+@@ -2332,7 +2332,7 @@
+         }
+     }
+ 
+-#if PLATFORM(IOS_FAMILY)
++#if PLATFORM(IOS_FAMILY) || defined(__ANDROID__)
+     // Get critical memory threshold for next cycle.
+     overCriticalMemoryThreshold(MemoryThresholdCallType::Direct);
+ #endif
+@@ -2629,7 +2629,7 @@
+     } else {
+         size_t bytesAllowedThisCycle = m_maxEdenSize;
+ 
+-#if PLATFORM(IOS_FAMILY)
++#if PLATFORM(IOS_FAMILY) || defined(__ANDROID__)
+         if (overCriticalMemoryThreshold())
+             bytesAllowedThisCycle = std::min(m_maxEdenSizeWhenCritical, bytesAllowedThisCycle);
+ #endif
+--- download/webkit/Source/JavaScriptCore/heap/Heap.h	2019-09-17 23:35:36.000000000 +0800
++++ target/webkit/Source/JavaScriptCore/heap/Heap.h	2019-09-17 23:18:36.000000000 +0800
+@@ -739,7 +739,7 @@
+     CurrentThreadState* m_currentThreadState { nullptr };
+     Thread* m_currentThread { nullptr }; // It's OK if this becomes a dangling pointer.
+ 
+-#if PLATFORM(IOS_FAMILY)
++#if PLATFORM(IOS_FAMILY) || defined(__ANDROID__)
+     unsigned m_precentAvailableMemoryCachedCallCount;
+     bool m_overCriticalMemoryThreshold;
+ #endif

scripts/patch.sh

@@ -57,6 +57,9 @@ JSC_PATCHSET=(
 
   # Intl default timezone with Android integration
   "jsc_intl_timezone.patch"
+
+  # Improve heap GC mechanism like iOS
+  "jsc_heap_gc_like_ios.patch"
 )
 
 if [[ "$I18N" = false ]]