From a4e969f4965059196ca948db781e52f7cfebf19e Mon Sep 17 00:00:00 2001
From: Lorry Tar Creator <lorry-tar-importer@lorry>
Date: Tue, 24 May 2016 08:28:08 +0000
Subject: webkitgtk-2.12.3

---
 Source/JavaScriptCore/jit/ExecutableAllocator.cpp | 45 ++++++++++++++---------
 1 file changed, 28 insertions(+), 17 deletions(-)

(limited to 'Source/JavaScriptCore/jit/ExecutableAllocator.cpp')

diff --git a/Source/JavaScriptCore/jit/ExecutableAllocator.cpp b/Source/JavaScriptCore/jit/ExecutableAllocator.cpp
index 5ac6cc412..4ede23531 100644
--- a/Source/JavaScriptCore/jit/ExecutableAllocator.cpp
+++ b/Source/JavaScriptCore/jit/ExecutableAllocator.cpp
@@ -24,18 +24,17 @@
  */
 
 #include "config.h"
-
 #include "ExecutableAllocator.h"
 
+#include "JSCInlines.h"
+
 #if ENABLE(EXECUTABLE_ALLOCATOR_DEMAND)
 #include "CodeProfiling.h"
 #include <wtf/HashSet.h>
+#include <wtf/Lock.h>
 #include <wtf/MetaAllocator.h>
+#include <wtf/NeverDestroyed.h>
 #include <wtf/PageReservation.h>
-#if ENABLE(ASSEMBLER_WX_EXCLUSIVE)
-#include <wtf/PassOwnPtr.h>
-#endif
-#include <wtf/ThreadingPrimitives.h>
 #include <wtf/VMTags.h>
 #endif
 
@@ -57,7 +56,7 @@ public:
     DemandExecutableAllocator()
         : MetaAllocator(jitAllocationGranule)
     {
-        MutexLocker lock(allocatorsMutex());
+        std::lock_guard<StaticLock> lock(allocatorsMutex());
         allocators().add(this);
         // Don't preallocate any memory here.
     }
@@ -65,7 +64,7 @@ public:
     virtual ~DemandExecutableAllocator()
     {
         {
-            MutexLocker lock(allocatorsMutex());
+            std::lock_guard<StaticLock> lock(allocatorsMutex());
             allocators().remove(this);
         }
         for (unsigned i = 0; i < reservations.size(); ++i)
@@ -75,7 +74,7 @@ public:
     static size_t bytesAllocatedByAllAllocators()
     {
         size_t total = 0;
-        MutexLocker lock(allocatorsMutex());
+        std::lock_guard<StaticLock> lock(allocatorsMutex());
         for (HashSet<DemandExecutableAllocator*>::const_iterator allocator = allocators().begin(); allocator != allocators().end(); ++allocator)
             total += (*allocator)->bytesAllocated();
         return total;
@@ -84,7 +83,7 @@ public:
     static size_t bytesCommittedByAllocactors()
     {
         size_t total = 0;
-        MutexLocker lock(allocatorsMutex());
+        std::lock_guard<StaticLock> lock(allocatorsMutex());
         for (HashSet<DemandExecutableAllocator*>::const_iterator allocator = allocators().begin(); allocator != allocators().end(); ++allocator)
             total += (*allocator)->bytesCommitted();
         return total;
@@ -93,7 +92,7 @@ public:
 #if ENABLE(META_ALLOCATOR_PROFILE)
     static void dumpProfileFromAllAllocators()
     {
-        MutexLocker lock(allocatorsMutex());
+        std::lock_guard<StaticLock> lock(allocatorsMutex());
         for (HashSet<DemandExecutableAllocator*>::const_iterator allocator = allocators().begin(); allocator != allocators().end(); ++allocator)
             (*allocator)->dumpProfile();
     }
@@ -135,12 +134,14 @@ private:
     Vector<PageReservation, 16> reservations;
     static HashSet<DemandExecutableAllocator*>& allocators()
     {
-        DEFINE_STATIC_LOCAL(HashSet<DemandExecutableAllocator*>, sAllocators, ());
-        return sAllocators;
+        static NeverDestroyed<HashSet<DemandExecutableAllocator*>> set;
+        return set;
     }
-    static Mutex& allocatorsMutex()
+
+    static StaticLock& allocatorsMutex()
     {
-        DEFINE_STATIC_LOCAL(Mutex, mutex, ());
+        static StaticLock mutex;
+
         return mutex;
     }
 };
@@ -169,7 +170,7 @@ void ExecutableAllocator::initializeAllocator()
 
 ExecutableAllocator::ExecutableAllocator(VM&)
 #if ENABLE(ASSEMBLER_WX_EXCLUSIVE)
-    : m_allocator(adoptPtr(new  DemandExecutableAllocator()))
+    : m_allocator(std::make_unique<DemandExecutableAllocator>())
 #endif
 {
     ASSERT(allocator());
@@ -212,11 +213,11 @@ double ExecutableAllocator::memoryPressureMultiplier(size_t addedMemoryUsage)
 
 }
 
-PassRefPtr<ExecutableMemoryHandle> ExecutableAllocator::allocate(VM&, size_t sizeInBytes, void* ownerUID, JITCompilationEffort effort)
+RefPtr<ExecutableMemoryHandle> ExecutableAllocator::allocate(VM&, size_t sizeInBytes, void* ownerUID, JITCompilationEffort effort)
 {
     RefPtr<ExecutableMemoryHandle> result = allocator()->allocate(sizeInBytes, ownerUID);
     RELEASE_ASSERT(result || effort != JITCompilationMustSucceed);
-    return result.release();
+    return result;
 }
 
 size_t ExecutableAllocator::committedByteCount()
@@ -231,6 +232,16 @@ void ExecutableAllocator::dumpProfile()
 }
 #endif
 
+Lock& ExecutableAllocator::getLock() const
+{
+    return gAllocator->getLock();
+}
+
+bool ExecutableAllocator::isValidExecutableMemory(const LockHolder& locker, void* address)
+{
+    return gAllocator->isInAllocatedMemory(locker, address);
+}
+
 #endif // ENABLE(EXECUTABLE_ALLOCATOR_DEMAND)
 
 #if ENABLE(ASSEMBLER_WX_EXCLUSIVE)
-- 
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