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// RUN: %clangxx %s -o %t && %run %t %p
#include <assert.h>
#include <errno.h>
#include <stdint.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/prctl.h>
#ifndef PR_SCHED_CORE
# define PR_SCHED_CORE 62
#endif
#ifndef PR_SCHED_CORE_CREATE
# define PR_SCHED_CORE_CREATE 1
#endif
#ifndef PR_SCHED_CORE_GET
# define PR_SCHED_CORE_GET 0
#endif
#ifndef PR_SET_VMA
# define PR_SET_VMA 0x53564d41
# define PR_SET_VMA_ANON_NAME 0
#endif
int main() {
int res;
res = prctl(PR_SCHED_CORE, PR_SCHED_CORE_CREATE, 0, 0, 0);
if (res < 0) {
assert(errno == EINVAL || errno == ENODEV);
return 0;
}
uint64_t cookie = 0;
res = prctl(PR_SCHED_CORE, PR_SCHED_CORE_GET, 0, 0, &cookie);
if (res < 0) {
assert(errno == EINVAL);
} else {
assert(cookie != 0);
}
char invname[81], vlname[] = "prctl";
for (auto i = 0; i < sizeof(invname); i++) {
invname[i] = 0x1e;
}
invname[80] = 0;
auto p =
mmap(nullptr, 128, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0);
assert(p != MAP_FAILED);
// regardless of kernel support, the name is invalid
res = prctl(PR_SET_VMA, PR_SET_VMA_ANON_NAME, (uintptr_t)p, 128,
(uintptr_t)invname);
assert(res == -1);
assert(errno == EINVAL);
res = prctl(PR_SET_VMA, PR_SET_VMA_ANON_NAME, (uintptr_t)p, 128,
(uintptr_t)vlname);
if (res < 0) {
assert(errno == EINVAL);
}
munmap(p, 128);
res = prctl(PR_SET_NAME, "tname");
if (res == 0) {
char name[16];
res = prctl(PR_GET_NAME, name);
if (res == 0) {
assert(!strcmp(name, "tname"));
}
}
return 0;
}
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