80 lines
1.7 KiB
C
80 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) Crackerjack Project., 2007
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* Copyright (C) 2022 SUSE LLC Andrea Cervesato <andrea.cervesato@suse.com>
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*/
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/*\
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* [Description]
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*
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* This test is checking if waitid() syscall recognizes a process that ended
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* with division by zero error.
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*/
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#include <stdlib.h>
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#include <sys/wait.h>
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#include <sys/prctl.h>
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#include "tst_test.h"
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static siginfo_t *infop;
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static int core_dumps = 1;
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static void run(void)
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{
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pid_t pidchild;
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/*
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* Triggering SIGFPE by invalid instruction is not always possible,
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* some architectures does not trap division-by-zero at all and even
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* when it's possible we would have to fight the compiler optimizations
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* that have tendency to remove undefined operations.
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*/
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pidchild = SAFE_FORK();
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if (!pidchild)
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raise(SIGFPE);
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TST_EXP_PASS(waitid(P_ALL, 0, infop, WEXITED));
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TST_EXP_EQ_LI(infop->si_pid, pidchild);
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TST_EXP_EQ_LI(infop->si_status, SIGFPE);
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TST_EXP_EQ_LI(infop->si_signo, SIGCHLD);
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if (core_dumps)
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TST_EXP_EQ_LI(infop->si_code, CLD_DUMPED);
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else
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TST_EXP_EQ_LI(infop->si_code, CLD_KILLED);
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}
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static void setup(void)
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{
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struct rlimit rlim;
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char c;
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SAFE_GETRLIMIT(RLIMIT_CORE, &rlim);
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SAFE_FILE_SCANF("/proc/sys/kernel/core_pattern", "%c", &c);
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if (rlim.rlim_cur)
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return;
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if (!rlim.rlim_max) {
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if (c != '|')
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core_dumps = 0;
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return;
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}
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tst_res(TINFO, "Raising RLIMIT_CORE rlim_cur=%li -> %li",
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rlim.rlim_cur, rlim.rlim_max);
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rlim.rlim_cur = rlim.rlim_max;
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SAFE_SETRLIMIT(RLIMIT_CORE, &rlim);
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}
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static struct tst_test test = {
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.test_all = run,
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.forks_child = 1,
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.setup = setup,
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.bufs = (struct tst_buffers[]) {
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{&infop, .size = sizeof(*infop)},
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{},
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},
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};
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