Compile uSocketsMock as C

fuzzing/Makefile

@@ -1,6 +1,7 @@
 default:
 # Fuzzing is only available with clang++
-	clang++ -DUWS_NO_ZLIB -DLIBUS_NO_SSL -std=c++17 -fsanitize=address,fuzzer -O3 -I../src -I../uSockets/src uSocketsMock.c MockedHelloWorld.cpp -o MockedHelloWorld
+	clang -DLIBUS_NO_SSL -c -O3 uSocketsMock.c
+	clang++ -DUWS_NO_ZLIB -DLIBUS_NO_SSL -std=c++17 -fsanitize=undefined,fuzzer -O3 -I../src -I../uSockets/src uSocketsMock.o MockedHelloWorld.cpp -o MockedHelloWorld
 # Purely "unit tests"
 	clang++ -std=c++17 -fsanitize=address,fuzzer -O3 WebSocket.cpp -o WebSocket
 	clang++ -std=c++17 -fsanitize=address,fuzzer -O3 Http.cpp -o Http

fuzzing/MockedHelloWorld.cpp

@@ -3,7 +3,7 @@
 #include "helpers.h"
 
 /* This function pushes data to the uSockets mock */
-extern void us_loop_read_mocked_data(struct us_loop *loop, char *data, unsigned int size);
+extern "C" void us_loop_read_mocked_data(struct us_loop *loop, char *data, unsigned int size);
 
 uWS::TemplatedApp<false> *app;
 

fuzzing/uSocketsMock.c

@@ -11,7 +11,7 @@ struct us_loop {
 };
 
 struct us_loop *us_create_loop(int default_hint, void (*wakeup_cb)(struct us_loop *loop), void (*pre_cb)(struct us_loop *loop), void (*post_cb)(struct us_loop *loop), unsigned int ext_size) {
-    return (struct us_loop *) malloc(sizeof(us_loop) + ext_size);
+    return (struct us_loop *) malloc(sizeof(struct us_loop) + ext_size);
 }
 
 void us_loop_free(struct us_loop *loop) {
@@ -38,7 +38,7 @@ struct us_socket_context {
 };
 
 struct us_socket_context *us_create_socket_context(struct us_loop *loop, int ext_size) {
-    struct us_socket_context *socket_context = (struct us_socket_context *) malloc(sizeof(us_socket_context) + ext_size);
+    struct us_socket_context *socket_context = (struct us_socket_context *) malloc(sizeof(struct us_socket_context) + ext_size);
 
     socket_context->loop = loop;
 
@@ -169,7 +169,7 @@ void us_loop_read_mocked_data(struct us_loop *loop, char *data, unsigned int siz
     int socket_ext_size = loop->listen_socket->socket_ext_size;
 
     /* Create a socket with information from the listen socket */
-    struct us_socket *s = (struct us_socket *) malloc(sizeof(us_socket) + socket_ext_size);
+    struct us_socket *s = (struct us_socket *) malloc(sizeof(struct us_socket) + socket_ext_size);
     s->context = loop->listen_socket->context;
 
     /* Emit open event */