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For PR351:

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Remove AllocateRWXMemory as it is not used any more in LLVM. The function
has been replaced with sys::Memory::AllocateRWX several months ago.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@18912 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Spencer 2004-12-13 20:14:30 +00:00
parent e171d5c812
commit 9b9e22a32e
2 changed files with 0 additions and 68 deletions
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7
include/llvm/Support/SystemUtils.h
View File

@ -53,13 +53,6 @@ int RunProgramWithTimeout(const std::string &ProgramPath, const char **Args,
///
int ExecWait (const char * const argv[], const char * const envp[]);
/// 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 then jump to it. Getting this type of memory
/// is very OS specific.
///
void *AllocateRWXMemory(unsigned NumBytes);
} // End llvm namespace
#endif

61
lib/Support/SystemUtils.cpp
View File

@ -286,64 +286,3 @@ int llvm::ExecWait(const char * const old_argv[],
// Otherwise, return failure.
return 1;
}
/// 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 then jump to it. Getting this type of memory
/// is very OS specific.
///
void *llvm::AllocateRWXMemory(unsigned NumBytes) {
if (NumBytes == 0) return 0;
#if defined(HAVE_WINDOWS_H)
// On windows we use VirtualAlloc.
void *P = VirtualAlloc(0, NumBytes, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
if (P == 0) {
std::cerr << "Error allocating executable memory!\n";
abort();
}
return P;
#elif defined(HAVE_MMAP)
static const long pageSize = GetPageSize();
unsigned NumPages = (NumBytes+pageSize-1)/pageSize;
/* FIXME: This should use the proper autoconf flags */
#if defined(i386) || defined(__i386__) || defined(__x86__)
/* Linux and *BSD tend to have these flags named differently. */
#if defined(MAP_ANON) && !defined(MAP_ANONYMOUS)
# define MAP_ANONYMOUS MAP_ANON
#endif /* defined(MAP_ANON) && !defined(MAP_ANONYMOUS) */
#elif defined(sparc) || defined(__sparc__) || defined(__sparcv9)
/* nothing */
#else
std::cerr << "This architecture has an unknown MMAP implementation!\n";
abort();
return 0;
#endif
int fd = -1;
#if defined(__linux__)
fd = 0;
#endif
unsigned mmapFlags = MAP_PRIVATE|MAP_ANONYMOUS;
#ifdef MAP_NORESERVE
mmapFlags |= MAP_NORESERVE;
#endif
void *pa = mmap(0, pageSize*NumPages, PROT_READ|PROT_WRITE|PROT_EXEC,
mmapFlags, fd, 0);
if (pa == MAP_FAILED) {
perror("mmap");
abort();
}
return pa;
#else
std::cerr << "Do not know how to allocate mem for the JIT without mmap!\n";
abort();
return 0;
#endif
}