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cbad701d0b
platforms. Implement GetLLVMSuffix function for the Path concept. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16292 91177308-0d34-0410-b5e6-96231b3b80d8
54 lines
1.8 KiB
C++
54 lines
1.8 KiB
C++
//===- Interix/Memory.cpp - Interix Memory Implementation -------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by Reid Spencer and is distributed under the
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// University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file provides the Interix specific implementation of various Memory
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// management utilities
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//
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//===----------------------------------------------------------------------===//
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// Include the generic unix implementation
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#include "../Unix/Memory.cpp"
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#include "llvm/System/Process.h"
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#include <sys/mman.h>
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namespace llvm {
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using namespace sys;
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//===----------------------------------------------------------------------===//
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//=== WARNING: Implementation here must contain only Interix specific code
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//=== and must not be generic UNIX code (see ../Unix/Memory.cpp)
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//===----------------------------------------------------------------------===//
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void* Memory::AllocateRWX(Memory& M, unsigned NumBytes) {
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if (NumBytes == 0) return 0;
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static const long pageSize = Process::GetPageSize();
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unsigned NumPages = (NumBytes+pageSize-1)/pageSize;
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void *pa = mmap(0, pageSize*NumPages, PROT_READ|PROT_WRITE|PROT_EXEC,
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MAP_PRIVATE|MAP_ANON|MAP_NOCORE, -1, 0);
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if (pa == (void*)-1) {
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throw std::string("Can't allocate RWX Memory: ") + strerror(errno);
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}
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M.Address = pa;
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M.AllocSize = NumPages*pageSize;
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return pa;
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}
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void Memory::ReleaseRWX(Memory& M) {
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if (M.Address == 0 || M.AllocSize == 0) return;
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if (0 != munmap(M.Address, M.AllocSize)) {
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throw std::string("Can't release RWX Memory: ") + sterror(errno);
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}
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}
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}
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// vim: sw=2 smartindent smarttab tw=80 autoindent expandtab
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