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//===- 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 "Win32.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;
}
}
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