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(EXECUTABLE_ALLOCATOR_DEMAND) && OS(WINDOWS)

    31 

    32 #include "windows.h"

    33 

    34 namespace JSC {

    35 

    36 void ExecutableAllocator::intializePageSize()

    37 {

    38     SYSTEM_INFO system_info;

    39     GetSystemInfo(&system_info);

    40     ExecutableAllocator::pageSize = system_info.dwPageSize;

    41 }

    42 

    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 

    52 void ExecutablePool::systemRelease(const ExecutablePool::Allocation& alloc)

    53 { 

    54     VirtualFree(alloc.pages, 0, MEM_RELEASE); 

    55 }

    56 

    57 bool ExecutableAllocator::isValid() const

    58 {

    59     return true;

    60 }

    61 

    62 #if ENABLE(ASSEMBLER_WX_EXCLUSIVE)

    63 #error "ASSEMBLER_WX_EXCLUSIVE not yet suported on this platform."

    64 #endif

    65 

    66 }

    67 

    68 #endif // HAVE(ASSEMBLER)