llvm-6502/lib/Support/Windows/DynamicLibrary.inc
NAKAMURA Takumi 66e6cd27a3 Windows/DynamicLibrary.inc: Remove 'extern "C"' in ELM_Callback.
'extern "C" static' is not accepted by g++-4.7. Rather to tweak, I just removed 'extern "C"', since it doesn't affect the ABI.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218290 91177308-0d34-0410-b5e6-96231b3b80d8
2014-09-23 01:09:46 +00:00

150 lines
4.3 KiB
C++

//===- 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 "WindowsSupport.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 DenseSet<HMODULE> *OpenedHandles;
static BOOL CALLBACK
ELM_Callback(WIN32_ELMCB_PCSTR ModuleName, ULONG_PTR ModuleBase,
ULONG ModuleSize, PVOID UserContext) {
OpenedHandles->insert((HMODULE)ModuleBase);
return TRUE;
}
DynamicLibrary DynamicLibrary::getPermanentLibrary(const char *filename,
std::string *errMsg) {
SmartScopedLock<true> lock(*SymbolsMutex);
if (!filename) {
// When no file is specified, enumerate all DLLs and EXEs in the process.
if (OpenedHandles == 0)
OpenedHandles = new DenseSet<HMODULE>();
EnumerateLoadedModules(GetCurrentProcess(), ELM_Callback, 0);
// Dummy library that represents "search all handles".
// This is mostly to ensure that the return value still shows up as "valid".
return DynamicLibrary(&OpenedHandles);
}
SmallVector<wchar_t, MAX_PATH> filenameUnicode;
if (std::error_code ec = windows::UTF8ToUTF16(filename, filenameUnicode)) {
SetLastError(ec.value());
MakeErrMsg(errMsg, std::string(filename) + ": Can't convert to UTF-16: ");
return DynamicLibrary();
}
HMODULE a_handle = LoadLibraryW(filenameUnicode.data());
if (a_handle == 0) {
MakeErrMsg(errMsg, std::string(filename) + ": Can't open : ");
return DynamicLibrary();
}
if (OpenedHandles == 0)
OpenedHandles = new DenseSet<HMODULE>();
// If we've already loaded this library, FreeLibrary() the handle in order to
// keep the internal refcount at +1.
if (!OpenedHandles->insert(a_handle).second)
FreeLibrary(a_handle);
return DynamicLibrary(a_handle);
}
// 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) {
SmartScopedLock<true> Lock(*SymbolsMutex);
// First check symbols added via AddSymbol().
if (ExplicitSymbols.isConstructed()) {
StringMap<void *>::iterator i = ExplicitSymbols->find(symbolName);
if (i != ExplicitSymbols->end())
return i->second;
}
// Now search the libraries.
if (OpenedHandles) {
for (DenseSet<HMODULE>::iterator I = OpenedHandles->begin(),
E = OpenedHandles->end(); I != E; ++I) {
FARPROC ptr = GetProcAddress((HMODULE)*I, symbolName);
if (ptr) {
return (void *)(intptr_t)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;
}
void *DynamicLibrary::getAddressOfSymbol(const char *symbolName) {
if (!isValid())
return NULL;
if (Data == &OpenedHandles)
return SearchForAddressOfSymbol(symbolName);
return (void *)(intptr_t)GetProcAddress((HMODULE)Data, symbolName);
}
}