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Bug 604799: allocate 64K code memory chunks on Windows, r=dvander

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This commit is contained in:
David Mandelin 2010-10-15 15:42:56 -07:00
parent d54dd1cc18
commit 1d856b8741
1 changed files with 10 additions and 1 deletions
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11
js/src/assembler/jit/ExecutableAllocator.h
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@ -55,7 +55,16 @@ extern "C" __declspec(dllimport) void CacheRangeFlush(LPVOID pAddr, DWORD dwLeng
#endif
#define JIT_ALLOCATOR_PAGE_SIZE (ExecutableAllocator::pageSize)
#define JIT_ALLOCATOR_LARGE_ALLOC_SIZE (ExecutableAllocator::pageSize * 4)
#if WTF_PLATFORM_WIN_OS || WTF_PLATFORM_WINCE
/*
* In practice, VirtualAlloc allocates in 64K chunks. (Technically, it
* allocates in page chunks, but the starting address is always a multiple
* of 64K, so each allocation uses up 64K of address space.
*/
# define JIT_ALLOCATOR_LARGE_ALLOC_SIZE (ExecutableAllocator::pageSize * 16)
#else
# define JIT_ALLOCATOR_LARGE_ALLOC_SIZE (ExecutableAllocator::pageSize * 4)
#endif
#if ENABLE_ASSEMBLER_WX_EXCLUSIVE
#define PROTECTION_FLAGS_RW (PROT_READ | PROT_WRITE)