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Add support for getting executable memory on Windows. This is actually

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much easier than on unix.  :)  The only evil thing is that windows.h defines
a macro named FindExecutable, which collides with one of our names.

The JIT now runs on windows, but it cannot resolve external functions
(like printf) yet.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13871 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-05-28 01:20:58 +00:00
parent c89fe6da17
commit 49f61c4ea4
1 changed files with 14 additions and 2 deletions
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16
lib/Support/SystemUtils.cpp
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@ -25,6 +25,7 @@
#include <iostream>
#include <cstdlib>
#include <cerrno>
#include "Config/windows.h"
using namespace llvm;
/// isExecutableFile - This function returns true if the filename specified
@ -63,6 +64,7 @@ bool llvm::isStandardOutAConsole() {
/// directory, nor in the PATH. If the executable cannot be found, return an
/// empty string.
///
#undef FindExecutable // needed on windows :(
std::string llvm::FindExecutable(const std::string &ExeName,
const std::string &ProgramPath) {
// First check the directory that bugpoint is in. We can do this if
@ -277,6 +279,17 @@ int llvm::ExecWait(const char * const old_argv[],
///
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 = sysconf(_SC_PAGESIZE);
unsigned NumPages = (NumBytes+pageSize-1)/pageSize;
@ -289,12 +302,11 @@ void *llvm::AllocateRWXMemory(unsigned NumBytes) {
#elif defined(sparc) || defined(__sparc__) || defined(__sparcv9)
/* nothing */
#else
std::cerr << "This architecture is not supported by the JIT!\n";
std::cerr << "This architecture has an unknown MMAP implementation!\n";
abort();
return 0;
#endif
#ifdef HAVE_MMAP
int fd = -1;
#if defined(__linux__)
fd = 0;