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