[fuzz] avoid tasklet execution if platform was reset (#4093)

tests/fuzz/cli_uart_received.cpp

@@ -40,11 +40,9 @@
 #include <openthread/thread_ftd.h>
 #include <openthread/platform/uart.h>
 
+#include "fuzzer_platform.h"
 #include "common/code_utils.hpp"
 
-extern "C" void FuzzerPlatformInit(void);
-extern "C" void FuzzerPlatformProcess(otInstance *aInstance);
-
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
 {
     const otPanId panId = 0xdead;
@@ -69,6 +67,8 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
 
     otPlatUartReceived(buf, (uint16_t)size);
 
+    VerifyOrExit(!FuzzerPlatformResetWasRequested());
+
     for (int i = 0; i < MAX_ITERATIONS; i++)
     {
         while (otTaskletsArePending(instance))