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1214c97666
We usually test against the newlib/libgloss environment, but for a few ports that also support Linux apps, we want to test that logic too. A lot of the C code is written such that it works with either newlib/libgloss or glibc/linux toolchains, but we have some tests that end up being Linux-specific. Cris has been using the target tuple as a rough proxy for this (where cris*-*-elf is assumed to be newlib/libgloss, and everything else is glibc/linux), but that is a bit too rough, and it doesn't work in a multitarget build. So lets create a few stub files that we can do compile tests with to detect the different setups, and then let tests declare which one they require (if they require any at all).
144 lines
2.9 KiB
C
144 lines
2.9 KiB
C
/* Check that closing a pipe with a nonempty buffer works.
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#progos: linux
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#output: got: a\ngot: b\nexit: 0\n
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*/
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#include <stddef.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <limits.h>
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#include <unistd.h>
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#include <sched.h>
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#include <signal.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <string.h>
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int pip[2];
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int pipemax;
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int
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process (void *arg)
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{
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char *s = arg;
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int lots = pipemax + 256;
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char *buf = malloc (lots);
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int ret;
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if (buf == NULL)
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abort ();
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*buf = *s;
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/* The first write should go straight through. */
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if (write (pip[1], buf, 1) != 1)
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abort ();
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*buf = s[1];
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/* The second write may or may not be successful for the whole
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write, but should be successful for at least the pipemax part.
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As linux/limits.h clamps PIPE_BUF to 4096, but the page size is
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actually 8k, we can get away with that much. There should be no
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error, though. Doing this on host shows that for
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x86_64-unknown-linux-gnu (2.6.14-1.1656_FC4) pipemax * 10 can be
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successfully written, perhaps for similar reasons. */
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ret = write (pip[1], buf, lots);
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if (ret < pipemax)
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{
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fprintf (stderr, "ret: %d, %s, %d\n", ret, strerror (errno), pipemax);
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fflush (0);
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abort ();
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}
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return 0;
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}
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int
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main (void)
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{
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int retcode;
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int pid;
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int st = 0;
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long stack[16384];
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char buf[1];
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/* We need to turn this off because we don't want (to have to model) a
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SIGPIPE resulting from the close. */
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if (signal (SIGPIPE, SIG_IGN) != SIG_DFL)
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abort ();
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retcode = pipe (pip);
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if (retcode != 0)
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{
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fprintf (stderr, "Bad pipe %d\n", retcode);
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abort ();
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}
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#ifdef PIPE_MAX
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pipemax = PIPE_MAX;
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#else
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pipemax = fpathconf (pip[1], _PC_PIPE_BUF);
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#endif
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if (pipemax <= 0)
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{
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fprintf (stderr, "Bad pipemax %d\n", pipemax);
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abort ();
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}
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pid = clone (process, (char *) stack + sizeof (stack) - 64,
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(CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND)
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| SIGCHLD, "ab");
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if (pid <= 0)
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{
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fprintf (stderr, "Bad clone %d\n", pid);
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abort ();
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}
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while ((retcode = read (pip[0], buf, 1)) == 0)
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;
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if (retcode != 1)
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{
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fprintf (stderr, "Bad read 1: %d\n", retcode);
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abort ();
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}
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printf ("got: %c\n", buf[0]);
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/* Need to read out something from the second write too before
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closing, or the writer can get EPIPE. */
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while ((retcode = read (pip[0], buf, 1)) == 0)
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;
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if (retcode != 1)
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{
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fprintf (stderr, "Bad read 2: %d\n", retcode);
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abort ();
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}
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printf ("got: %c\n", buf[0]);
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if (close (pip[0]) != 0)
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{
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perror ("pip close");
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abort ();
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}
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retcode = waitpid (pid, &st, __WALL);
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if (retcode != pid || !WIFEXITED (st))
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{
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fprintf (stderr, "Bad wait %d:%d %x\n", pid, retcode, st);
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perror ("errno");
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abort ();
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}
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printf ("exit: %d\n", WEXITSTATUS (st));
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return 0;
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}
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