//
// The LLVM Compiler Infrastructure
//
-// This file was developed by Reid Spencer and is distributed under the
+// This file was developed by Jeff Cohen and is distributed under the
// University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
-// This file provides the Win32 specific implementation of the DynamicLibrary
+// This file provides the Win32 specific implementation of DynamicLibrary.
//
//===----------------------------------------------------------------------===//
#include "Win32.h"
-#include <windef.h>
+
+#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;
//===----------------------------------------------------------------------===//
//=== WARNING: Implementation here must contain only Win32 specific code
-//=== and must not be UNIX code
+//=== and must not be UNIX code.
//===----------------------------------------------------------------------===//
+static std::vector<HMODULE> OpenedHandles;
+
+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) {
- handle = new HMODULE;
- *((HMODULE*)handle) = GetModuleHandle(NULL);
-
- if (*((HMODULE*)handle) == 0) {
- ThrowError("Can't GetModuleHandle: ");
+ handle = GetModuleHandle(NULL);
+ OpenedHandles.push_back((HMODULE)handle);
+}
+
+DynamicLibrary::~DynamicLibrary() {
+ if (handle == 0)
+ return;
+
+ // GetModuleHandle() does not increment the ref count, so we must not free
+ // the handle to the executable.
+ if (handle != GetModuleHandle(NULL))
+ FreeLibrary((HMODULE)handle);
+ handle = 0;
+
+ for (std::vector<HMODULE>::iterator I = OpenedHandles.begin(),
+ E = OpenedHandles.end(); I != E; ++I) {
+ if (*I == handle) {
+ // Note: don't use the swap/pop_back trick here. Order is important.
+ OpenedHandles.erase(I);
+ }
}
}
-DynamicLibrary::DynamicLibrary(const char*filename) : handle(0) {
- handle = new HMODULE;
- *((HMODULE*)handle) = LoadLibrary(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)
+ return MakeErrMsg(ErrMsg, std::string(filename) + ": Can't open : ");
- if (*((HMODULE*)handle) == 0) {
- ThrowError("Can't LoadLibrary: ");
+ 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;
}
-DynamicLibrary::~DynamicLibrary() {
- assert(handle !=0 && "Invalid DynamicLibrary handle");
- if (*((HMODULE*)handle))
- FreeLibrary(*((HMODULE*)handle));
- delete (HMODULE*)handle;
+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 (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 (void*) GetProcAddress(*((HMODULE*)handle), symbolName);
+ assert(handle != 0 && "Invalid DynamicLibrary handle");
+ return (void *) GetProcAddress((HMODULE)handle, symbolName);
}
}
-// vim: sw=2 smartindent smarttab tw=80 autoindent expandtab