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Use the SystemUtils.h file to do our dirty work. 

llvm-svn: 13868
This commit is contained in:
Chris Lattner 2004-05-28 00:57:27 +00:00
parent abb26eac9d
commit 0bd7797446
1 changed files with 2 additions and 52 deletions
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54
llvm/lib/ExecutionEngine/JIT/Emitter.cpp
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@ -13,9 +13,6 @@
//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "jit"
#ifndef _POSIX_MAPPED_FILES
#define _POSIX_MAPPED_FILES
#endif
#include "JIT.h"
#include "llvm/Constant.h"
#include "llvm/Module.h"
@ -25,8 +22,7 @@
#include "llvm/Target/TargetData.h"
#include "Support/Debug.h"
#include "Support/Statistic.h"
#include "Config/unistd.h"
#include "Config/sys/mman.h"
#include "Support/SystemUtils.h"
using namespace llvm;
namespace {
@ -53,55 +49,9 @@ namespace {
};
}
// getMemory - Return a pointer to the specified number of bytes, which is
// mapped as executable readable and writable.
static void *getMemory(unsigned NumBytes) {
if (NumBytes == 0) return 0;
static const long pageSize = sysconf(_SC_PAGESIZE);
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 is not supported by the JIT!\n";
abort();
return 0;
#endif
#ifdef HAVE_MMAP
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
}
JITMemoryManager::JITMemoryManager() {
// Allocate a 16M block of memory...
MemBase = (unsigned char*)getMemory(16 << 20);
MemBase = (unsigned char*)AllocateRWXMemory(16 << 20);
FunctionBase = MemBase + 512*1024; // Use 512k for stubs
// Allocate stubs backwards from the function base, allocate functions forward