Changeset 62511 in webkit for trunk/JavaScriptCore/wtf/Platform.h

Timestamp:

Jul 5, 2010, 5:22:42 PM (15 years ago)

Author:

[email protected]

Message:

​https://bugs.webkit.org/show_bug.cgi?id=41641

Reviewed by Sam Weinig.

Update compile flags to allow use of ExecutableAllocatorFixedVMPool on platforms
other than x86-64 (this may be useful on 32-bit platforms, too).

Simplify ifdefs by dividing into thwo broad allocation strategies
(ENABLE_EXECUTABLE_ALLOCATOR_FIXED & ENABLE_EXECUTABLE_ALLOCATOR_DEMAND).

Rename constant used in the code to have names descriptive of their purpose,
rather than their specific value on a given platform.

• jit/ExecutableAllocator.cpp:

(JSC::ExecutableAllocator::reprotectRegion):
(JSC::ExecutableAllocator::cacheFlush):

• jit/ExecutableAllocatorFixedVMPool.cpp:

(JSC::FixedVMPoolAllocator::FixedVMPoolAllocator):
(JSC::FixedVMPoolAllocator::free):
(JSC::ExecutablePool::systemAlloc):

• jit/ExecutableAllocatorPosix.cpp:
• jit/ExecutableAllocatorSymbian.cpp:
• jit/ExecutableAllocatorWin.cpp:
• wtf/Platform.h:

File:

• trunk/JavaScriptCore/wtf/Platform.h (modified) (1 diff)

trunk/JavaScriptCore/wtf/Platform.h

@@ -1044 +1044 @@
 #endif
 
+/* Pick which allocator to use; we only need an executable allocator if the assembler is compiled in.
+   On x86-64 we use a single fixed mmap, on other platforms we mmap on demand. */
+#if ENABLE(ASSEMBLER)
+#if CPU(X86_64)
+#define ENABLE_EXECUTABLE_ALLOCATOR_FIXED 1
+#else
+#define ENABLE_EXECUTABLE_ALLOCATOR_DEMAND 1
+#endif
+#endif
+
 #if !defined(ENABLE_PAN_SCROLLING) && OS(WINDOWS)
 #define ENABLE_PAN_SCROLLING 1