| /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- |
| * vim: set ts=8 sts=4 et sw=4 tw=99: |
| * |
| * Copyright (C) 2008 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "jit/ExecutableAllocator.h" |
| |
| #include "js/MemoryMetrics.h" |
| |
| #ifdef __APPLE__ |
| #include <TargetConditionals.h> |
| #endif |
| |
| using namespace js::jit; |
| |
| size_t ExecutableAllocator::pageSize = 0; |
| size_t ExecutableAllocator::largeAllocSize = 0; |
| |
| ExecutablePool::~ExecutablePool() |
| { |
| MOZ_ASSERT(m_ionCodeBytes == 0); |
| MOZ_ASSERT(m_baselineCodeBytes == 0); |
| MOZ_ASSERT(m_regexpCodeBytes == 0); |
| MOZ_ASSERT(m_otherCodeBytes == 0); |
| |
| m_allocator->releasePoolPages(this); |
| } |
| |
| /* static */ void |
| ExecutableAllocator::initStatic() |
| { |
| if (!pageSize) { |
| pageSize = determinePageSize(); |
| // On Windows, VirtualAlloc effectively 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.) So a size less than that would be |
| // pointless. But it turns out that 64KB is a reasonable size for |
| // all platforms. (This assumes 4KB pages.) On 64-bit windows, |
| // AllocateExecutableMemory prepends an extra page for structured |
| // exception handling data (see comments in function) onto whatever |
| // is passed in, so subtract one page here. |
| #if defined(JS_CPU_X64) && defined(XP_WIN) |
| largeAllocSize = pageSize * 15; |
| #else |
| largeAllocSize = pageSize * 16; |
| #endif |
| } |
| } |
| |
| void |
| ExecutableAllocator::addSizeOfCode(JS::CodeSizes* sizes) const |
| { |
| if (m_pools.initialized()) { |
| for (ExecPoolHashSet::Range r = m_pools.all(); !r.empty(); r.popFront()) { |
| ExecutablePool* pool = r.front(); |
| sizes->ion += pool->m_ionCodeBytes; |
| sizes->baseline += pool->m_baselineCodeBytes; |
| sizes->regexp += pool->m_regexpCodeBytes; |
| sizes->other += pool->m_otherCodeBytes; |
| sizes->unused += pool->m_allocation.size - pool->m_ionCodeBytes |
| - pool->m_baselineCodeBytes |
| - pool->m_regexpCodeBytes |
| - pool->m_otherCodeBytes; |
| } |
| } |
| } |
| |
| #if TARGET_OS_IPHONE |
| bool ExecutableAllocator::nonWritableJitCode = true; |
| #else |
| bool ExecutableAllocator::nonWritableJitCode = false; |
| #endif |