93 lines
1.7 KiB
C
93 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2016 Xiao Yang <yangx.jy@cn.fujitsu.com>
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*/
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/*
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* Testname: kcmp03.c
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*
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* Description:
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* 1) kcmp() returns 0 if the processes share the same file system information.
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* 2) kcmp() returns 0 if the processes share I/O context.
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* 3) kcmp() returns 0 if the processes share the same list of System V
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* semaphore undo operations.
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* 4) kcmp() returns 0 if the processes share the same address space.
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*/
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#define _GNU_SOURCE
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#include <errno.h>
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#include <stdlib.h>
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#include <sched.h>
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#include <sys/wait.h>
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#include "tst_test.h"
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#include "kcmp.h"
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#include "lapi/sched.h"
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#define STACK_SIZE (1024*1024)
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static int pid1;
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static int pid2;
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static void *stack;
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static struct tcase {
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int clone_type;
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int kcmp_type;
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} tcases[] = {
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{CLONE_VM, KCMP_VM},
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{CLONE_FS, KCMP_FS},
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{CLONE_IO, KCMP_IO},
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{CLONE_SYSVSEM, KCMP_SYSVSEM}
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};
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static void setup(void)
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{
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stack = SAFE_MALLOC(STACK_SIZE);
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}
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static void cleanup(void)
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{
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free(stack);
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}
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static int do_child(void *arg)
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{
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pid2 = getpid();
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TEST(kcmp(pid1, pid2, *(int *)arg, 0, 0));
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if (TST_RET == -1) {
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tst_res(TFAIL | TTERRNO, "kcmp() failed unexpectedly");
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return 0;
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}
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if (TST_RET == 0)
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tst_res(TPASS, "kcmp() returned the expected value");
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else
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tst_res(TFAIL, "kcmp() returned the unexpected value");
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return 0;
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}
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static void verify_kcmp(unsigned int n)
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{
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int res;
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struct tcase *tc = &tcases[n];
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pid1 = getpid();
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res = ltp_clone(tc->clone_type | SIGCHLD, do_child, &tc->kcmp_type,
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STACK_SIZE, stack);
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if (res == -1)
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tst_res(TFAIL | TERRNO, "clone() Failed");
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}
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static struct tst_test test = {
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.tcnt = ARRAY_SIZE(tcases),
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.setup = setup,
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.cleanup = cleanup,
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.forks_child = 1,
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.test = verify_kcmp,
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.min_kver = "3.5.0"
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};
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