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