Re-apply change 2fbc823bb66db6ef6f6acc74d2baa96ebe1dec81 by Jocelyn Turcotte

Re-apply change 6125aabeccb01a07c706fe4227279eb827e8e890 by Jocelyn Turcotte
Re-apply change 6b8ac349b9a477863a8c8388dcc0658f3284bc54 by Jocelyn Turcotte
Re-applying commit ee0a43fee20cc398b505eb65218ebed56dfc8f39
by Simon Hausmann

Fix crash of QtScript on Mac OS X

When compiling on 10.4 but running on 10.5 the flags passed to vm_map cause
it to crash.

For now fall back to the use of mmap() as allocator instead.

Reviewed-by: Kent Hansen

1 files changed, 6 insertions, 2 deletions

diff --git a/src/3rdparty/webkit/JavaScriptCore/runtime/Collector.cpp b/src/3rdparty/webkit/JavaScriptCore/runtime/Collector.cpp
index b885049..8b647a0 100644
--- a/src/3rdparty/webkit/JavaScriptCore/runtime/Collector.cpp
+++ b/src/3rdparty/webkit/JavaScriptCore/runtime/Collector.cpp
@@ -240,7 +240,9 @@ void Heap::destroy()
 template <HeapType heapType>
 NEVER_INLINE CollectorBlock* Heap::allocateBlock()
 {
-#if PLATFORM(DARWIN)
+    // Disable the use of vm_map for the Qt build on Darwin, because when compiled on 10.4
+    // it crashes on 10.5
+#if PLATFORM(DARWIN) && !PLATFORM(QT)
     vm_address_t address = 0;
     // FIXME: tag the region as a JavaScriptCore heap when we get a registered VM tag: <rdar://problem/6054788>.
     vm_map(current_task(), &address, BLOCK_SIZE, BLOCK_OFFSET_MASK, VM_FLAGS_ANYWHERE | VM_TAG_FOR_COLLECTOR_MEMORY, MEMORY_OBJECT_NULL, 0, FALSE, VM_PROT_DEFAULT, VM_PROT_DEFAULT, VM_INHERIT_DEFAULT);
@@ -332,7 +334,9 @@ NEVER_INLINE void Heap::freeBlock(size_t block)
 
 NEVER_INLINE void Heap::freeBlock(CollectorBlock* block)
 {
-#if PLATFORM(DARWIN)    
+    // Disable the use of vm_deallocate for the Qt build on Darwin, because when compiled on 10.4
+    // it crashes on 10.5
+#if PLATFORM(DARWIN) && !PLATFORM(QT)
     vm_deallocate(current_task(), reinterpret_cast<vm_address_t>(block), BLOCK_SIZE);
 #elif PLATFORM(SYMBIAN)
     userChunk->Free(reinterpret_cast<TAny*>(block));