96 lines · cpp
1// RUN: %clangxx %s -o %t && %run %t %p2 3// UNSUPPORTED: android4 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_CORE15# define PR_SCHED_CORE 6216#endif17 18#ifndef PR_SCHED_CORE_CREATE19# define PR_SCHED_CORE_CREATE 120#endif21 22#ifndef PR_SCHED_CORE_GET23# define PR_SCHED_CORE_GET 024#endif25 26#ifndef PR_SET_VMA27# define PR_SET_VMA 0x53564d4128# define PR_SET_VMA_ANON_NAME 029#endif30 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(nullptr, 128, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0);61 assert(p != MAP_FAILED);62 // regardless of kernel support, the name is invalid63 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(p, 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 unsigned long name = reinterpret_cast<unsigned long>(nullptr);92 prctl(PR_SET_VMA, PR_SET_VMA_ANON_NAME, 0, nullptr, name);93 94 return 0;95}96