| 1 | /* |
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| 2 | * Copyright (C) 2015 The Qt Company Ltd |
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| 3 | * |
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| 4 | * This library is free software; you can redistribute it and/or |
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| 5 | * modify it under the terms of the GNU Lesser General Public |
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| 6 | * License as published by the Free Software Foundation; either |
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| 7 | * version 2 of the License, or (at your option) any later version. |
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| 8 | * |
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| 9 | * This library is distributed in the hope that it will be useful, |
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| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 12 | * Lesser General Public License for more details. |
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| 13 | * |
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| 14 | * You should have received a copy of the GNU Lesser General Public |
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| 15 | * License along with this library; if not, write to the Free Software |
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| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, |
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| 17 | * Boston, MA 02110-1301 USA |
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| 18 | * |
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| 19 | */ |
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| 20 | |
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| 21 | #include "config.h" |
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| 22 | |
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| 23 | #include "ExecutableAllocator.h" |
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| 24 | |
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| 25 | #if ENABLE(EXECUTABLE_ALLOCATOR_DEMAND) && OS(SYMBIAN) |
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| 26 | |
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| 27 | #include <e32hal.h> |
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| 28 | #include <e32std.h> |
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| 29 | |
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| 30 | // Set the page size to 256 Kb to compensate for moving memory model limitation |
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| 31 | const size_t MOVING_MEM_PAGE_SIZE = 256 * 1024; |
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| 32 | |
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| 33 | namespace JSC { |
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| 34 | |
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| 35 | void ExecutableAllocator::intializePageSize() |
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| 36 | { |
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| 37 | #if CPU(ARMV5_OR_LOWER) |
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| 38 | // The moving memory model (as used in ARMv5 and earlier platforms) |
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| 39 | // on Symbian OS limits the number of chunks for each process to 16. |
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| 40 | // To mitigate this limitation increase the pagesize to |
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| 41 | // allocate less of larger chunks. |
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| 42 | ExecutableAllocator::pageSize = MOVING_MEM_PAGE_SIZE; |
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| 43 | #else |
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| 44 | TInt page_size; |
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| 45 | UserHal::PageSizeInBytes(page_size); |
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| 46 | ExecutableAllocator::pageSize = page_size; |
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| 47 | #endif |
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| 48 | } |
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| 49 | |
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| 50 | ExecutablePool::Allocation ExecutablePool::systemAlloc(size_t n) |
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| 51 | { |
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| 52 | RChunk* codeChunk = new RChunk(); |
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| 53 | |
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| 54 | TInt errorCode = codeChunk->CreateLocalCode(n, n); |
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| 55 | |
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| 56 | char* allocation = reinterpret_cast<char*>(codeChunk->Base()); |
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| 57 | if (!allocation) |
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| 58 | CRASH(); |
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| 59 | ExecutablePool::Allocation alloc = { allocation, n, codeChunk }; |
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| 60 | return alloc; |
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| 61 | } |
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| 62 | |
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| 63 | void ExecutablePool::systemRelease(const ExecutablePool::Allocation& alloc) |
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| 64 | { |
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| 65 | alloc.chunk->Close(); |
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| 66 | delete alloc.chunk; |
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| 67 | } |
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| 68 | |
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| 69 | #if ENABLE(ASSEMBLER_WX_EXCLUSIVE) |
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| 70 | #error "ASSEMBLER_WX_EXCLUSIVE not yet suported on this platform." |
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| 71 | #endif |
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| 72 | |
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| 73 | } |
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| 74 | |
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| 75 | #endif // HAVE(ASSEMBLER) |
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| 76 | |
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