1// Test that ASan doesn't raise false alarm when MSG_TRUNC is present.
2//
3// RUN: %clangxx %s -o %t && %run %t 2>&1
4//
5// UNSUPPORTED: android
6
7#include <stdlib.h>
8#include <string.h>
9#include <sys/types.h>
10#include <sys/socket.h>
11#include <netinet/ip.h>
12#include <assert.h>
13
14int main() {
15 int fd_0 = socket(AF_INET, SOCK_DGRAM, protocol: 0);
16 int fd_1 = socket(AF_INET, SOCK_DGRAM, protocol: 0);
17 struct sockaddr_in sin;
18 socklen_t len = sizeof(sin);
19 char *buf = (char *)malloc(size: 1);
20
21 sin.sin_family = AF_INET;
22 // Choose a random port to bind.
23 sin.sin_port = 0;
24 sin.sin_addr.s_addr = INADDR_ANY;
25
26 assert(bind(fd_1, (struct sockaddr *)&sin, sizeof(sin)) == 0);
27 // Get the address and port binded.
28 assert(getsockname(fd_1, (struct sockaddr *)&sin, &len) == 0);
29 assert(sendto(fd_0, "hello", strlen("hello"), MSG_DONTWAIT,
30 (struct sockaddr *)&sin, sizeof(sin)) != -1);
31 assert(recv(fd_1, buf, 1, MSG_TRUNC) != -1);
32 free(ptr: buf);
33
34 return 0;
35}
36
37

source code of compiler-rt/test/sanitizer_common/TestCases/Linux/recv_msg_trunc.cpp