1 /*
2 * Copyright (C) 2008 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26 #include "config.h"
27
28 #include "ExecutableAllocator.h"
29
30 #if ENABLE(ASSEMBLER) && OS(WINDOWS)
31
32 #include "windows.h"
33
34 namespace JSC {
35
intializePageSize()36 void ExecutableAllocator::intializePageSize()
37 {
38 SYSTEM_INFO system_info;
39 GetSystemInfo(&system_info);
40 ExecutableAllocator::pageSize = system_info.dwPageSize;
41 }
42
systemAlloc(size_t n)43 ExecutablePool::Allocation ExecutablePool::systemAlloc(size_t n)
44 {
45 void* allocation = VirtualAlloc(0, n, MEM_COMMIT | MEM_RESERVE, PAGE_EXECUTE_READWRITE);
46 if (!allocation)
47 CRASH();
48 ExecutablePool::Allocation alloc = {reinterpret_cast<char*>(allocation), n};
49 return alloc;
50 }
51
systemRelease(const ExecutablePool::Allocation & alloc)52 void ExecutablePool::systemRelease(const ExecutablePool::Allocation& alloc)
53 {
54 VirtualFree(alloc.pages, 0, MEM_RELEASE);
55 }
56
57 #if ENABLE(ASSEMBLER_WX_EXCLUSIVE)
58 #error "ASSEMBLER_WX_EXCLUSIVE not yet suported on this platform."
59 #endif
60
61 }
62
63 #endif // HAVE(ASSEMBLER)
64