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Diffstat (limited to 'lib/System/Darwin/Memory.cpp')
-rw-r--r-- | lib/System/Darwin/Memory.cpp | 63 |
1 files changed, 0 insertions, 63 deletions
diff --git a/lib/System/Darwin/Memory.cpp b/lib/System/Darwin/Memory.cpp deleted file mode 100644 index 5735ebac2a..0000000000 --- a/lib/System/Darwin/Memory.cpp +++ /dev/null @@ -1,63 +0,0 @@ -//===- Darwin/Memory.cpp - Darwin Memory Implementation ---------*- C++ -*-===// -// -// The LLVM Compiler Infrastructure -// -// This file was developed by Reid Spencer and is distributed under the -// University of Illinois Open Source License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// -// -// This file provides the Darwin specific implementation of various Memory -// management utilities -// -//===----------------------------------------------------------------------===// - -// Include the generic unix implementation -#include "../Unix/Memory.cpp" -#include "llvm/System/Process.h" -#include <sys/mman.h> - -namespace llvm { -using namespace sys; - -//===----------------------------------------------------------------------===// -//=== WARNING: Implementation here must contain only Darwin-specific code -//=== and must not be generic UNIX code (see ../Unix/Memory.cpp) -//===----------------------------------------------------------------------===// - -/// AllocateRWXMemory - Allocate a slab of memory with read/write/execute -/// permissions. This is typically used for JIT applications where we want -/// to emit code to the memory and then jump to it. Getting this type of memory -/// is very OS-specific. -/// -MemoryBlock Memory::AllocateRWX(unsigned NumBytes) { - if (NumBytes == 0) return MemoryBlock(); - - static const long pageSize = Process::GetPageSize(); - unsigned NumPages = (NumBytes+pageSize-1)/pageSize; - - void *pa = mmap(0, pageSize*NumPages, PROT_READ|PROT_WRITE|PROT_EXEC, - MAP_PRIVATE|MAP_ANON, -1, 0); - if (pa == MAP_FAILED) { - char msg[MAXPATHLEN]; - strerror_r(errno, msg, MAXPATHLEN-1); - throw std::string("Can't allocate RWX Memory: ") + msg; - } - MemoryBlock result; - result.Address = pa; - result.Size = NumPages*pageSize; - return result; -} - -void Memory::ReleaseRWX(MemoryBlock& M) { - if (M.Address == 0 || M.Size == 0) return; - if (0 != munmap(M.Address, M.Size)) { - char msg[MAXPATHLEN]; - strerror_r(errno, msg, MAXPATHLEN-1); - throw std::string("Can't release RWX Memory: ") + msg; - } -} - -} - -// vim: sw=2 smartindent smarttab tw=80 autoindent expandtab |