1 files changed, 166 insertions, 0 deletions
diff --git a/lib/Support/Windows/DynamicLibrary.inc b/lib/Support/Windows/DynamicLibrary.inc
new file mode 100644
index 0000000000000..2c14366c0761d
--- /dev/null
+++ b/lib/Support/Windows/DynamicLibrary.inc
@@ -0,0 +1,166 @@
+//===- 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)
+  #if _MSC_VER < 1500 && (!defined(VER_PRODUCTBUILD) || VER_PRODUCTBUILD < 6000)
+    #define OLD_ELM_CALLBACK_DECL 1
+  #endif
+#elif defined(__MINGW64__)
+  // Use new callback.
+#elif defined(__MINGW32__)
+  #define OLD_ELM_CALLBACK_DECL 1
+#endif
+
+#ifdef OLD_ELM_CALLBACK_DECL
+  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.
+#define EXPLICIT_SYMBOL(SYM)                    \
+  extern "C" { extern void *SYM; }
+#define EXPLICIT_SYMBOL2(SYMFROM, SYMTO) EXPLICIT_SYMBOL(SYMTO)
+
+#include "explicit_symbols.inc"
+
+#undef EXPLICIT_SYMBOL
+#undef EXPLICIT_SYMBOL2
+
+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;
+    }
+  }
+
+  #define EXPLICIT_SYMBOL(SYM)                    \
+    if (!strcmp(symbolName, #SYM)) return (void*)&SYM;
+  #define EXPLICIT_SYMBOL2(SYMFROM, SYMTO)        \
+    if (!strcmp(symbolName, #SYMFROM)) return (void*)&SYMTO;
+
+  {
+    #include "explicit_symbols.inc"
+  }
+
+  #undef EXPLICIT_SYMBOL
+  #undef EXPLICIT_SYMBOL2
+
+  return 0;
+}
+
+}