libevent HTTP benchmark does not free the evhttp server

[OneBucket126]

Summary

The evhttp_new(base) result is used for the server but never passed to evhttp_free(). Its allocation persists if dispatch returns.

Affected code

• Repository commit: 477033f938fd47dfecde43c82257cd286d9fa38e
• File: benchmark/http/libevent/libevent_http_bench.c
• Original scanner location: line 159

Evidence

Source: benchmark/http/libevent/libevent_http_bench.c lines 151-175

 151: 	}
 152: 
 153: 	base = event_base_new_with_config(cfg);
 154: 	if (!base) {
 155: 		fprintf(stderr, "creating event_base failed. Exiting.\n");
 156: 		return 1;
 157: 	}
 158: 
 159: 	http = evhttp_new(base);
 160: 
 161: 	content = malloc(content_len);
 162: 	if (content == NULL) {
 163: 		fprintf(stderr, "Cannot allocate content\n");
 164: 		exit(1);
 165: 	} else {
 166: 		int i = 0;
 167: 		for (i = 0; i < (int)content_len; ++i)
 168: 			content[i] = (i & 255);
 169: 	}
 170: 
 171: 	evhttp_set_cb(http, "/ind", http_basic_cb, NULL);
 172: 	fprintf(stderr, "/ind - basic content (memory copy)\n");
 173: 
 174: 	evhttp_set_cb(http, "/ref", http_ref_cb, NULL);
 175: 	fprintf(stderr, "/ref - basic content (reference)\n");

Source: benchmark/http/libevent/libevent_http_bench.c lines 181-196

 181: 	evhttp_bind_socket(http, "0.0.0.0", port);
 182: 
 183: #ifdef _WIN32
 184: 	if (use_iocp) {
 185: 		struct timeval tv={99999999,0};
 186: 		event_base_loopexit(base, &tv);
 187: 	}
 188: #endif
 189: 	event_base_dispatch(base);
 190: 
 191: #ifdef _WIN32
 192: 	WSACleanup();
 193: #endif
 194: 
 195: 	/* NOTREACHED */
 196: 	return (0);

Impact

The HTTP server object and associated callbacks/listener state remain allocated until process termination.