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Add support for getting executable memory on Windows. This is actually
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
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@ -25,6 +25,7 @@
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#include <iostream>
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#include <cstdlib>
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#include <cerrno>
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#include "Config/windows.h"
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using namespace llvm;
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/// isExecutableFile - This function returns true if the filename specified
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@ -63,6 +64,7 @@ bool llvm::isStandardOutAConsole() {
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/// directory, nor in the PATH. If the executable cannot be found, return an
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/// empty string.
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///
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#undef FindExecutable // needed on windows :(
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std::string llvm::FindExecutable(const std::string &ExeName,
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const std::string &ProgramPath) {
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// First check the directory that bugpoint is in. We can do this if
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@ -277,6 +279,17 @@ int llvm::ExecWait(const char * const old_argv[],
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///
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void *llvm::AllocateRWXMemory(unsigned NumBytes) {
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if (NumBytes == 0) return 0;
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#if defined(HAVE_WINDOWS_H)
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// On windows we use VirtualAlloc.
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void *P = VirtualAlloc(0, NumBytes, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
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if (P == 0) {
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std::cerr << "Error allocating executable memory!\n";
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abort();
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}
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return P;
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#elif defined(HAVE_MMAP)
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static const long pageSize = sysconf(_SC_PAGESIZE);
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unsigned NumPages = (NumBytes+pageSize-1)/pageSize;
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@ -289,12 +302,11 @@ void *llvm::AllocateRWXMemory(unsigned NumBytes) {
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#elif defined(sparc) || defined(__sparc__) || defined(__sparcv9)
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/* nothing */
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#else
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std::cerr << "This architecture is not supported by the JIT!\n";
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std::cerr << "This architecture has an unknown MMAP implementation!\n";
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abort();
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return 0;
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#endif
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#ifdef HAVE_MMAP
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int fd = -1;
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#if defined(__linux__)
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fd = 0;
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