1 //===- FuzzerUtilWindows.cpp - Misc utils for Windows. --------------------===//
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
8 // Misc utils implementation for Windows.
9 //===----------------------------------------------------------------------===//
10 #include "FuzzerDefs.h"
12 #include "FuzzerCommand.h"
14 #include "FuzzerInternal.h"
22 #include <sys/types.h>
25 // This must be included after windows.h.
30 static const FuzzingOptions* HandlerOpt = nullptr;
32 static LONG CALLBACK ExceptionHandler(PEXCEPTION_POINTERS ExceptionInfo) {
33 switch (ExceptionInfo->ExceptionRecord->ExceptionCode) {
34 case EXCEPTION_ACCESS_VIOLATION:
35 case EXCEPTION_ARRAY_BOUNDS_EXCEEDED:
36 case EXCEPTION_STACK_OVERFLOW:
37 if (HandlerOpt->HandleSegv)
38 Fuzzer::StaticCrashSignalCallback();
40 case EXCEPTION_DATATYPE_MISALIGNMENT:
41 case EXCEPTION_IN_PAGE_ERROR:
42 if (HandlerOpt->HandleBus)
43 Fuzzer::StaticCrashSignalCallback();
45 case EXCEPTION_ILLEGAL_INSTRUCTION:
46 case EXCEPTION_PRIV_INSTRUCTION:
47 if (HandlerOpt->HandleIll)
48 Fuzzer::StaticCrashSignalCallback();
50 case EXCEPTION_FLT_DENORMAL_OPERAND:
51 case EXCEPTION_FLT_DIVIDE_BY_ZERO:
52 case EXCEPTION_FLT_INEXACT_RESULT:
53 case EXCEPTION_FLT_INVALID_OPERATION:
54 case EXCEPTION_FLT_OVERFLOW:
55 case EXCEPTION_FLT_STACK_CHECK:
56 case EXCEPTION_FLT_UNDERFLOW:
57 case EXCEPTION_INT_DIVIDE_BY_ZERO:
58 case EXCEPTION_INT_OVERFLOW:
59 if (HandlerOpt->HandleFpe)
60 Fuzzer::StaticCrashSignalCallback();
62 // TODO: handle (Options.HandleXfsz)
64 return EXCEPTION_CONTINUE_SEARCH;
67 BOOL WINAPI CtrlHandler(DWORD dwCtrlType) {
70 if (HandlerOpt->HandleInt)
71 Fuzzer::StaticInterruptCallback();
73 case CTRL_BREAK_EVENT:
74 if (HandlerOpt->HandleTerm)
75 Fuzzer::StaticInterruptCallback();
81 void CALLBACK AlarmHandler(PVOID, BOOLEAN) {
82 Fuzzer::StaticAlarmCallback();
88 TimerQ() : TimerQueue(NULL) {}
91 DeleteTimerQueueEx(TimerQueue, NULL);
93 void SetTimer(int Seconds) {
95 TimerQueue = CreateTimerQueue();
97 Printf("libFuzzer: CreateTimerQueue failed.\n");
102 if (!CreateTimerQueueTimer(&Timer, TimerQueue, AlarmHandler, NULL,
103 Seconds*1000, Seconds*1000, 0)) {
104 Printf("libFuzzer: CreateTimerQueueTimer failed.\n");
112 static void CrashHandler(int) { Fuzzer::StaticCrashSignalCallback(); }
114 bool Mprotect(void *Ptr, size_t Size, bool AllowReadWrite) {
115 return false; // UNIMPLEMENTED
118 void SetSignalHandler(const FuzzingOptions& Options) {
119 HandlerOpt = &Options;
121 if (Options.UnitTimeoutSec > 0)
122 Timer.SetTimer(Options.UnitTimeoutSec / 2 + 1);
124 if (Options.HandleInt || Options.HandleTerm)
125 if (!SetConsoleCtrlHandler(CtrlHandler, TRUE)) {
126 DWORD LastError = GetLastError();
127 Printf("libFuzzer: SetConsoleCtrlHandler failed (Error code: %lu).\n",
132 if (Options.HandleSegv || Options.HandleBus || Options.HandleIll ||
134 SetUnhandledExceptionFilter(ExceptionHandler);
136 if (Options.HandleAbrt)
137 if (SIG_ERR == signal(SIGABRT, CrashHandler)) {
138 Printf("libFuzzer: signal failed with %d\n", errno);
143 void SleepSeconds(int Seconds) { Sleep(Seconds * 1000); }
145 unsigned long GetPid() { return GetCurrentProcessId(); }
147 size_t GetPeakRSSMb() {
148 PROCESS_MEMORY_COUNTERS info;
149 if (!GetProcessMemoryInfo(GetCurrentProcess(), &info, sizeof(info)))
151 return info.PeakWorkingSetSize >> 20;
154 FILE *OpenProcessPipe(const char *Command, const char *Mode) {
155 return _popen(Command, Mode);
158 int ExecuteCommand(const Command &Cmd) {
159 std::string CmdLine = Cmd.toString();
160 return system(CmdLine.c_str());
163 const void *SearchMemory(const void *Data, size_t DataLen, const void *Patt,
165 // TODO: make this implementation more efficient.
166 const char *Cdata = (const char *)Data;
167 const char *Cpatt = (const char *)Patt;
169 if (!Data || !Patt || DataLen == 0 || PattLen == 0 || DataLen < PattLen)
173 return memchr(Data, *Cpatt, DataLen);
175 const char *End = Cdata + DataLen - PattLen + 1;
177 for (const char *It = Cdata; It < End; ++It)
178 if (It[0] == Cpatt[0] && memcmp(It, Cpatt, PattLen) == 0)
184 std::string DisassembleCmd(const std::string &FileName) {
185 Vector<std::string> command_vector;
186 command_vector.push_back("dumpbin /summary > nul");
187 if (ExecuteCommand(Command(command_vector)) == 0)
188 return "dumpbin /disasm " + FileName;
189 Printf("libFuzzer: couldn't find tool to disassemble (dumpbin)\n");
193 std::string SearchRegexCmd(const std::string &Regex) {
194 return "findstr /r \"" + Regex + "\"";
197 } // namespace fuzzer
199 #endif // LIBFUZZER_WINDOWS