[PATCH] D29751: [libFuzzer] Use dynamic loading for External Functions on Windows.
Marcos Pividori via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Thu Feb 9 17:47:26 PST 2017
This revision was automatically updated to reflect the committed changes.
Closed by commit rL294687: [libFuzzer] Use dynamic loading for External Functions on Windows. (authored by mpividori).
Changed prior to commit:
https://reviews.llvm.org/D29751?vs=87769&id=87927#toc
Repository:
rL LLVM
https://reviews.llvm.org/D29751
Files:
llvm/trunk/lib/Fuzzer/CMakeLists.txt
llvm/trunk/lib/Fuzzer/FuzzerExtFunctionsDlsymWin.cpp
Index: llvm/trunk/lib/Fuzzer/CMakeLists.txt
===================================================================
--- llvm/trunk/lib/Fuzzer/CMakeLists.txt
+++ llvm/trunk/lib/Fuzzer/CMakeLists.txt
@@ -12,8 +12,8 @@
FuzzerCrossOver.cpp
FuzzerDriver.cpp
FuzzerExtFunctionsDlsym.cpp
+ FuzzerExtFunctionsDlsymWin.cpp
FuzzerExtFunctionsWeak.cpp
- FuzzerExtFunctionsWeakAlias.cpp
FuzzerIO.cpp
FuzzerIOPosix.cpp
FuzzerIOWindows.cpp
Index: llvm/trunk/lib/Fuzzer/FuzzerExtFunctionsDlsymWin.cpp
===================================================================
--- llvm/trunk/lib/Fuzzer/FuzzerExtFunctionsDlsymWin.cpp
+++ llvm/trunk/lib/Fuzzer/FuzzerExtFunctionsDlsymWin.cpp
@@ -0,0 +1,60 @@
+//===- 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 "Windows.h"
+#include "Psapi.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
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