Unbreak mingw32 build

[oota-llvm.git] / lib / System / Win32 / DynamicLibrary.inc

diff --git a/lib/System/Win32/DynamicLibrary.inc b/lib/System/Win32/DynamicLibrary.inc
index 27078836dd30a154d7eafd9c81b0ff921b600957..91de11349d22e663bdf6610272f1044d995162dd 100644 (file)
--- a/lib/System/Win32/DynamicLibrary.inc
+++ b/lib/System/Win32/DynamicLibrary.inc
@@ -7,14 +7,25 @@
 // 
 //===----------------------------------------------------------------------===//
 //
-// This file provides the Win32 specific implementation of  DynamicLibrary.
+// This file provides the Win32 specific implementation of DynamicLibrary.
 //
 //===----------------------------------------------------------------------===//
 
 #include "Win32.h"
-#include <dbghelp.h>
 
-#pragma comment(lib, "dbghelp.lib")
+#ifdef __MINGW32__
+ #include <imagehlp.h>
+#else
+ #include <dbghelp.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;
@@ -26,13 +37,31 @@ using namespace sys;
 
 static std::vector<HMODULE> OpenedHandles;
 
-BOOL CALLBACK ELM_Callback(PSTR  ModuleName,
-                           ULONG ModuleBase,
-                           ULONG ModuleSize,
-                           PVOID UserContext)
-{
-  OpenedHandles.push_back((HMODULE)ModuleBase);
-  return TRUE;
+extern "C" {
+  static BOOL CALLBACK ELM_Callback(PSTR  ModuleName,
+                                    ULONG ModuleBase,
+                                    ULONG ModuleSize,
+                                    PVOID UserContext)
+  {
+    // 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;
+  }
 }
 
 DynamicLibrary::DynamicLibrary() : handle(0) {
@@ -40,16 +69,6 @@ DynamicLibrary::DynamicLibrary() : handle(0) {
   OpenedHandles.push_back((HMODULE)handle);
 }
 
-DynamicLibrary::DynamicLibrary(const char*filename) : handle(0) {
-  HMODULE a_handle = LoadLibrary(filename);
-
-  if (a_handle == 0)
-    ThrowError(std::string(filename) + ": Can't open : ");
-
-  handle = a_handle;
-  OpenedHandles.push_back(a_handle);
-}
-
 DynamicLibrary::~DynamicLibrary() {
   if (handle == 0)
     return;
@@ -69,40 +88,68 @@ DynamicLibrary::~DynamicLibrary() {
   }
 }
 
-void DynamicLibrary::LoadLibraryPermanently(const char* filename) {
+#ifdef __MINGW32__
+  #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; }
+  
+  EXPLICIT_SYMBOL_DEF(_alloca);
+#endif
+ 
+bool DynamicLibrary::LoadLibraryPermanently(const char *filename,
+                                            std::string *ErrMsg) {
   if (filename) {
     HMODULE a_handle = LoadLibrary(filename);
 
-       if (a_handle == 0)
-               ThrowError(std::string(filename) + ": Can't open : ");
+    if (a_handle == 0)
+      return MakeErrMsg(ErrMsg, std::string(filename) + ": Can't open : ");
 
-       OpenedHandles.push_back(a_handle);
+    OpenedHandles.push_back(a_handle);
   } else {
-       // When no file is specified, enumerate all DLLs and EXEs in the
+    // When no file is specified, enumerate all DLLs and EXEs in the
     // process.
     EnumerateLoadedModules(GetCurrentProcess(), ELM_Callback, 0);
   }
 
-  // Because we don't remember the handles, we will never free them; hence,
+  // Because we don't remember the handle, we will never free it; hence,
   // it is loaded permanently.
+  return false;
 }
 
 void* DynamicLibrary::SearchForAddressOfSymbol(const char* symbolName) {
+  // First check symbols added via AddSymbol().
+  std::map<std::string, void *>::iterator I = g_symbols.find(symbolName);
+  if (I != g_symbols.end())
+    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 ptr;
+      return (void *) ptr;
+  }
+
+#ifdef __MINGW32__  
+  {
+    EXPLICIT_SYMBOL(_alloca);
+    EXPLICIT_SYMBOL2(alloca, _alloca);
+#undef EXPLICIT_SYMBOL
+#undef EXPLICIT_SYMBOL2
+#undef EXPLICIT_SYMBOL_DEF    
   }
+#endif
 
   return 0;
 }
 
 void *DynamicLibrary::GetAddressOfSymbol(const char *symbolName) {
   assert(handle != 0 && "Invalid DynamicLibrary handle");
-  return GetProcAddress((HMODULE)handle, symbolName);
+  return (void *) GetProcAddress((HMODULE)handle, symbolName);
 }
 
 }
 
-// vim: sw=2 smartindent smarttab tw=80 autoindent expandtab