Dmitry V. Levin
c6782f144a
strace test suite is now provided under the terms of the GNU General Public License version 2 or later, see tests/COPYING for more details.
62 lines
1.5 KiB
C
62 lines
1.5 KiB
C
/*
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* Check decoding of prctl PR_GET_TSC/PR_SET_TSC operations.
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*
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* Copyright (c) 2016 JingPiao Chen <chenjingpiao@foxmail.com>
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* Copyright (c) 2016 Eugene Syromyatnikov <evgsyr@gmail.com>
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* Copyright (c) 2016-2017 The strace developers.
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* All rights reserved.
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "tests.h"
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#include <asm/unistd.h>
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#include <linux/prctl.h>
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#if defined __NR_prctl && defined PR_GET_TSC && defined PR_SET_TSC
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# include <stdio.h>
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# include <unistd.h>
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int
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main(void)
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{
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static const kernel_ulong_t bogus_tsc =
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(kernel_ulong_t) 0xdeadc0defacebeefULL;
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TAIL_ALLOC_OBJECT_CONST_PTR(int, tsc);
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long rc;
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rc = syscall(__NR_prctl, PR_SET_TSC, 0);
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printf("prctl(PR_SET_TSC, 0 /* PR_TSC_??? */) = %s\n", sprintrc(rc));
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rc = syscall(__NR_prctl, PR_SET_TSC, bogus_tsc);
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printf("prctl(PR_SET_TSC, %#x /* PR_TSC_??? */) = %s\n",
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(unsigned int) bogus_tsc, sprintrc(rc));
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rc = syscall(__NR_prctl, PR_SET_TSC, PR_TSC_SIGSEGV);
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printf("prctl(PR_SET_TSC, PR_TSC_SIGSEGV) = %s\n", sprintrc(rc));
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rc = syscall(__NR_prctl, PR_GET_TSC, NULL);
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printf("prctl(PR_GET_TSC, NULL) = %s\n", sprintrc(rc));
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rc = syscall(__NR_prctl, PR_GET_TSC, tsc + 1);
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printf("prctl(PR_GET_TSC, %p) = %s\n", tsc + 1, sprintrc(rc));
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rc = syscall(__NR_prctl, PR_GET_TSC, tsc);
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if (rc)
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printf("prctl(PR_GET_TSC, %p) = %s\n", tsc, sprintrc(rc));
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else
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printf("prctl(PR_GET_TSC, [PR_TSC_SIGSEGV]) = %s\n",
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sprintrc(rc));
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puts("+++ exited with 0 +++");
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return 0;
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}
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#else
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SKIP_MAIN_UNDEFINED("__NR_prctl && PR_GET_TSC && PR_SET_TSC")
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#endif
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