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//===- FuzzerExtFunctionsDlsymWin.cpp - Interface to external functions ---===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// Implementation using dynamic loading for Windows.
//===----------------------------------------------------------------------===//
#include "FuzzerDefs.h"
#if LIBFUZZER_WINDOWS
#include "FuzzerExtFunctions.h"
#include "FuzzerIO.h"
#include "Psapi.h"
#include "Windows.h"
namespace fuzzer {
ExternalFunctions::ExternalFunctions() {
HMODULE Modules[1024];
DWORD BytesNeeded;
HANDLE CurrentProcess = GetCurrentProcess();
if (!EnumProcessModules(CurrentProcess, Modules, sizeof(Modules),
&BytesNeeded)) {
Printf("EnumProcessModules failed (error: %d).\n", GetLastError());
exit(1);
}
if (sizeof(Modules) < BytesNeeded) {
Printf("Error: the array is not big enough to hold all loaded modules.\n");
exit(1);
}
for (size_t i = 0; i < (BytesNeeded / sizeof(HMODULE)); i++)
{
FARPROC Fn;
#define EXT_FUNC(NAME, RETURN_TYPE, FUNC_SIG, WARN) \
if (this->NAME == nullptr) { \
Fn = GetProcAddress(Modules[i], #NAME); \
if (Fn == nullptr) \
Fn = GetProcAddress(Modules[i], #NAME "__dll"); \
this->NAME = (decltype(ExternalFunctions::NAME)) Fn; \
}
#include "FuzzerExtFunctions.def"
#undef EXT_FUNC
}
#define EXT_FUNC(NAME, RETURN_TYPE, FUNC_SIG, WARN) \
if (this->NAME == nullptr && WARN) \
Printf("WARNING: Failed to find function \"%s\".\n", #NAME);
#include "FuzzerExtFunctions.def"
#undef EXT_FUNC
}
} // namespace fuzzer
#endif // LIBFUZZER_WINDOWS