1// RUN: %clangxx %s -o %t && %run %t %p
2
3// UNSUPPORTED: android
4
5#include <assert.h>
6#include <errno.h>
7#include <linux/filter.h>
8#include <linux/seccomp.h>
9#include <stdint.h>
10#include <string.h>
11#include <sys/mman.h>
12#include <sys/prctl.h>
13
14#ifndef PR_SCHED_CORE
15# define PR_SCHED_CORE 62
16#endif
17
18#ifndef PR_SCHED_CORE_CREATE
19# define PR_SCHED_CORE_CREATE 1
20#endif
21
22#ifndef PR_SCHED_CORE_GET
23# define PR_SCHED_CORE_GET 0
24#endif
25
26#ifndef PR_SET_VMA
27# define PR_SET_VMA 0x53564d41
28# define PR_SET_VMA_ANON_NAME 0
29#endif
30
31int main() {
32 int res;
33 res = prctl(PR_SCHED_CORE, PR_SCHED_CORE_CREATE, 0, 0, 0);
34 if (res < 0) {
35 assert(errno == EINVAL || errno == ENODEV);
36 } else {
37 uint64_t cookie = 0;
38 res = prctl(PR_SCHED_CORE, PR_SCHED_CORE_GET, 0, 0, &cookie);
39 if (res < 0) {
40 assert(errno == EINVAL);
41 } else {
42 assert(cookie != 0);
43 }
44 }
45
46 int signum;
47 res = prctl(PR_GET_PDEATHSIG, reinterpret_cast<unsigned long>(&signum));
48 if (res < 0) {
49 assert(errno == EINVAL);
50 } else {
51 assert(signum == 0);
52 }
53
54 char invname[81], vlname[] = "prctl";
55 for (auto i = 0; i < sizeof(invname); i++) {
56 invname[i] = 0x1e;
57 }
58 invname[80] = 0;
59 auto p =
60 mmap(addr: nullptr, len: 128, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, fd: -1, offset: 0);
61 assert(p != MAP_FAILED);
62 // regardless of kernel support, the name is invalid
63 res = prctl(PR_SET_VMA, PR_SET_VMA_ANON_NAME, (uintptr_t)p, 128,
64 (uintptr_t)invname);
65 assert(res == -1);
66 assert(errno == EINVAL);
67 res = prctl(PR_SET_VMA, PR_SET_VMA_ANON_NAME, (uintptr_t)p, 128,
68 (uintptr_t)vlname);
69 if (res < 0) {
70 assert(errno == EINVAL);
71 }
72 munmap(addr: p, len: 128);
73
74 res = prctl(PR_SET_NAME, "tname");
75 if (res == 0) {
76 char name[16];
77 res = prctl(PR_GET_NAME, name);
78 if (res == 0) {
79 assert(!strcmp(name, "tname"));
80 }
81 }
82
83 sock_filter f[] = {{.code = (BPF_LD | BPF_W | BPF_ABS),
84 .k = (uint32_t)(SKF_AD_OFF | SKF_AD_CPU)},
85 {.code = (BPF_RET | BPF_A), .k = 0}};
86 sock_fprog pr = {.len = 2, .filter = f};
87
88 res = prctl(PR_SET_SECCOMP, SECCOMP_MODE_FILTER, &pr);
89 assert(res == -1);
90
91 return 0;
92}
93

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