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https://github.com/darlinghq/darling-xnu.git
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54 lines
1.1 KiB
C
54 lines
1.1 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <sys/uio.h>
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#include <unistd.h>
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#include <darwintest.h>
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static void
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too_long(int ignored)
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{
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T_ASSERT_FAIL("child readv is blocked");
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}
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T_DECL(pipe_read_infloop_55437634, "Infinite loop in pipe_read")
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{
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int p[2];
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char c = 0;
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struct iovec iov = {
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.iov_base = &c,
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.iov_len = 0x100000000UL
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};
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pid_t child;
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int status = 0;
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T_SETUPBEGIN;
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/* create a pipe with some data in it: */
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T_ASSERT_POSIX_SUCCESS(pipe(p), NULL);
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T_ASSERT_POSIX_SUCCESS(write(p[1], "A", 1), NULL);
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T_SETUPEND;
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T_ASSERT_POSIX_SUCCESS(child = fork(), NULL);
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if (!child) {
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readv(p[0], &iov, 1);
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exit(0);
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}
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/*
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* if the waitpid takes too long, the child is probably stuck in the
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* infinite loop, so fail via too_long.
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*/
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T_ASSERT_NE(signal(SIGALRM, too_long), SIG_ERR, NULL);
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T_ASSERT_POSIX_SUCCESS(alarm(10), NULL);
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/* this will hang if the bug is there: */
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T_ASSERT_POSIX_SUCCESS(waitpid(child, &status, 0), NULL);
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/* expecting a clean, zero exit: */
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T_ASSERT_TRUE(WIFEXITED(status), NULL);
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T_ASSERT_EQ(WEXITSTATUS(status), 0, NULL);
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}
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