1// RUN: %clangxx_asan -O0 -g %s -o %t && %env_asan_opts=handle_ioctl=1 not %run %t 2>&1 | FileCheck %s
2// RUN: %clangxx_asan -O3 -g %s -o %t && %env_asan_opts=handle_ioctl=1 not %run %t 2>&1 | FileCheck %s
3
4// RUN: %clangxx_asan -O0 -g %s -o %t && %run %t
5// RUN: %clangxx_asan -O3 -g %s -o %t && %run %t
6
7#include <assert.h>
8#include <stdlib.h>
9#include <sys/ioctl.h>
10#include <sys/socket.h>
11#include <unistd.h>
12
13#if defined(__sun__) && defined(__svr4__)
14#include <sys/filio.h>
15#endif
16
17int main(int argc, char **argv) {
18 int fd = socket(AF_UNIX, SOCK_DGRAM, protocol: 0);
19
20 int nonblock;
21 int res = ioctl(fd: fd, FIONBIO, &nonblock + 1);
22 // CHECK: AddressSanitizer: stack-buffer-overflow
23 // CHECK: READ of size 4 at
24 // CHECK: {{#.* in main .*ioctl.cpp:}}[[@LINE-3]]
25 assert(res == 0);
26 close(fd: fd);
27 return 0;
28}
29

source code of compiler-rt/test/asan/TestCases/Posix/ioctl.cpp