[libFuzzer] Update tests to use more general functions instead of pos…

…ix specific.

Replace sleep() posix function by a more portable sleep_for() function
from std. Also, ignore memmem() and strcasestr() on Windows.

Differential Revision: https://reviews.llvm.org/D27729

llvm-svn: 289964

llvm/lib/Fuzzer/test/OutOfMemoryTest.cpp

@@ -8,6 +8,7 @@
 #include <cstddef>
 #include <cstring>
 #include <iostream>
+#include <thread>
 #include <unistd.h>
 
 static volatile char *SinkPtr;
@@ -21,7 +22,7 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
           char *p = new char[kSize];
           memset(p, 0, kSize);
           SinkPtr = p;
-          sleep(1);
+          std::this_thread::sleep_for(std::chrono::seconds(1));
         }
       }
     }

llvm/lib/Fuzzer/test/StrstrTest.cpp

@@ -8,6 +8,12 @@
 #include <cstdio>
 #include <cstdlib>
 
+// Windows does not have strcasestr and memmem, so we are not testing them.
+#ifdef _WIN32
+#define strcasestr strstr
+#define memmem(a, b, c, d) true
+#endif
+
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
   if (Size < 4) return 0;
   std::string s(reinterpret_cast<const char*>(Data), Size);