Merge System into Support.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120298 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Support/Windows/DynamicLibrary.inc b/lib/Support/Windows/DynamicLibrary.inc
new file mode 100644
index 0000000..5fad37a
--- /dev/null
+++ b/lib/Support/Windows/DynamicLibrary.inc
@@ -0,0 +1,199 @@
+//===- Win32/DynamicLibrary.cpp - Win32 DL Implementation -------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file provides the Win32 specific implementation of DynamicLibrary.
+//
+//===----------------------------------------------------------------------===//
+
+#include "Windows.h"
+
+#ifdef __MINGW32__
+ #include <imagehlp.h>
+#else
+ #include <dbghelp.h>
+#endif
+
+#ifdef _MSC_VER
+ #include <ntverp.h>
+#endif
+
+#ifdef __MINGW32__
+ #if (HAVE_LIBIMAGEHLP != 1)
+ #error "libimagehlp.a should be present"
+ #endif
+#else
+ #pragma comment(lib, "dbghelp.lib")
+#endif
+
+namespace llvm {
+using namespace sys;
+
+//===----------------------------------------------------------------------===//
+//=== WARNING: Implementation here must contain only Win32 specific code
+//=== and must not be UNIX code.
+//===----------------------------------------------------------------------===//
+
+static std::vector<HMODULE> OpenedHandles;
+
+#ifdef _WIN64
+ typedef DWORD64 ModuleBaseType;
+#else
+ typedef ULONG ModuleBaseType;
+#endif
+
+extern "C" {
+// Use old callback if:
+// - Not using Visual Studio
+// - Visual Studio 2005 or earlier but only if we are not using the Windows SDK
+// or Windows SDK version is older than 6.0
+// Use new callback if:
+// - Newer Visual Studio (comes with newer SDK).
+// - Visual Studio 2005 with Windows SDK 6.0+
+#if !defined(_MSC_VER) || _MSC_VER < 1500 && (!defined(VER_PRODUCTBUILD) || VER_PRODUCTBUILD < 6000)
+ static BOOL CALLBACK ELM_Callback(PSTR ModuleName,
+ ModuleBaseType ModuleBase,
+ ULONG ModuleSize,
+ PVOID UserContext)
+#else
+ static BOOL CALLBACK ELM_Callback(PCSTR ModuleName,
+ ModuleBaseType ModuleBase,
+ ULONG ModuleSize,
+ PVOID UserContext)
+#endif
+ {
+ // Ignore VC++ runtimes prior to 7.1. Somehow some of them get loaded
+ // into the process.
+ if (stricmp(ModuleName, "msvci70") != 0 &&
+ stricmp(ModuleName, "msvcirt") != 0 &&
+ stricmp(ModuleName, "msvcp50") != 0 &&
+ stricmp(ModuleName, "msvcp60") != 0 &&
+ stricmp(ModuleName, "msvcp70") != 0 &&
+ stricmp(ModuleName, "msvcr70") != 0 &&
+#ifndef __MINGW32__
+ // Mingw32 uses msvcrt.dll by default. Don't ignore it.
+ // Otherwise, user should be aware, what he's doing :)
+ stricmp(ModuleName, "msvcrt") != 0 &&
+#endif
+ stricmp(ModuleName, "msvcrt20") != 0 &&
+ stricmp(ModuleName, "msvcrt40") != 0) {
+ OpenedHandles.push_back((HMODULE)ModuleBase);
+ }
+ return TRUE;
+ }
+}
+
+bool DynamicLibrary::LoadLibraryPermanently(const char *filename,
+ std::string *ErrMsg) {
+ if (filename) {
+ HMODULE a_handle = LoadLibrary(filename);
+
+ if (a_handle == 0)
+ return MakeErrMsg(ErrMsg, std::string(filename) + ": Can't open : ");
+
+ OpenedHandles.push_back(a_handle);
+ } else {
+ // When no file is specified, enumerate all DLLs and EXEs in the
+ // process.
+ EnumerateLoadedModules(GetCurrentProcess(), ELM_Callback, 0);
+ }
+
+ // Because we don't remember the handle, we will never free it; hence,
+ // it is loaded permanently.
+ return false;
+}
+
+// Stack probing routines are in the support library (e.g. libgcc), but we don't
+// have dynamic linking on windows. Provide a hook.
+#if defined(__MINGW32__) || defined (_MSC_VER)
+ #define EXPLICIT_SYMBOL(SYM) \
+ if (!strcmp(symbolName, #SYM)) return (void*)&SYM
+ #define EXPLICIT_SYMBOL2(SYMFROM, SYMTO) \
+ if (!strcmp(symbolName, #SYMFROM)) return (void*)&SYMTO
+ #define EXPLICIT_SYMBOL_DEF(SYM) \
+ extern "C" { extern void *SYM; }
+
+ #if defined(__MINGW32__)
+ EXPLICIT_SYMBOL_DEF(_alloca)
+ EXPLICIT_SYMBOL_DEF(__main)
+ EXPLICIT_SYMBOL_DEF(__ashldi3)
+ EXPLICIT_SYMBOL_DEF(__ashrdi3)
+ EXPLICIT_SYMBOL_DEF(__cmpdi2)
+ EXPLICIT_SYMBOL_DEF(__divdi3)
+ EXPLICIT_SYMBOL_DEF(__fixdfdi)
+ EXPLICIT_SYMBOL_DEF(__fixsfdi)
+ EXPLICIT_SYMBOL_DEF(__fixunsdfdi)
+ EXPLICIT_SYMBOL_DEF(__fixunssfdi)
+ EXPLICIT_SYMBOL_DEF(__floatdidf)
+ EXPLICIT_SYMBOL_DEF(__floatdisf)
+ EXPLICIT_SYMBOL_DEF(__lshrdi3)
+ EXPLICIT_SYMBOL_DEF(__moddi3)
+ EXPLICIT_SYMBOL_DEF(__udivdi3)
+ EXPLICIT_SYMBOL_DEF(__umoddi3)
+ #elif defined(_MSC_VER)
+ EXPLICIT_SYMBOL_DEF(_alloca_probe)
+ #endif
+#endif
+
+void* DynamicLibrary::SearchForAddressOfSymbol(const char* symbolName) {
+ // First check symbols added via AddSymbol().
+ if (ExplicitSymbols) {
+ std::map<std::string, void *>::iterator I =
+ ExplicitSymbols->find(symbolName);
+ std::map<std::string, void *>::iterator E = ExplicitSymbols->end();
+ if (I != E)
+ return I->second;
+ }
+
+ // Now search the libraries.
+ for (std::vector<HMODULE>::iterator I = OpenedHandles.begin(),
+ E = OpenedHandles.end(); I != E; ++I) {
+ FARPROC ptr = GetProcAddress((HMODULE)*I, symbolName);
+ if (ptr) {
+ return (void *) ptr;
+ }
+ }
+
+#if defined(__MINGW32__)
+ {
+ EXPLICIT_SYMBOL(_alloca);
+ EXPLICIT_SYMBOL(__main);
+ EXPLICIT_SYMBOL(__ashldi3);
+ EXPLICIT_SYMBOL(__ashrdi3);
+ EXPLICIT_SYMBOL(__cmpdi2);
+ EXPLICIT_SYMBOL(__divdi3);
+ EXPLICIT_SYMBOL(__fixdfdi);
+ EXPLICIT_SYMBOL(__fixsfdi);
+ EXPLICIT_SYMBOL(__fixunsdfdi);
+ EXPLICIT_SYMBOL(__fixunssfdi);
+ EXPLICIT_SYMBOL(__floatdidf);
+ EXPLICIT_SYMBOL(__floatdisf);
+ EXPLICIT_SYMBOL(__lshrdi3);
+ EXPLICIT_SYMBOL(__moddi3);
+ EXPLICIT_SYMBOL(__udivdi3);
+ EXPLICIT_SYMBOL(__umoddi3);
+
+ EXPLICIT_SYMBOL2(alloca, _alloca);
+#undef EXPLICIT_SYMBOL
+#undef EXPLICIT_SYMBOL2
+#undef EXPLICIT_SYMBOL_DEF
+ }
+#elif defined(_MSC_VER)
+ {
+ EXPLICIT_SYMBOL2(alloca, _alloca_probe);
+ EXPLICIT_SYMBOL2(_alloca, _alloca_probe);
+#undef EXPLICIT_SYMBOL
+#undef EXPLICIT_SYMBOL2
+#undef EXPLICIT_SYMBOL_DEF
+ }
+#endif
+
+ return 0;
+}
+
+}