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