9e78f6f6e7
This change moves the main implementation of _dl_catch_error, _dl_signal_error to libc.so, where TLS variables can be used directly. This removes a writable function pointer from the rtld_global variable. For use during initial relocation, minimal implementations of these functions are provided in ld.so. These are eventually interposed by the libc.so implementations. This is implemented by compiling elf/dl-error-skeleton.c twice, via elf/dl-error.c and elf/dl-error-minimal.c. As a side effect of this change, the static version of dl-error.c no longer includes support for the _dl_signal_cerror/_dl_receive_error mechanism because it is only used in ld.so.
106 lines
2.8 KiB
C
106 lines
2.8 KiB
C
/* Test that loading libpthread does not break ld.so exceptions (bug 16628).
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Copyright (C) 2016 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <dlfcn.h>
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#include <signal.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/wait.h>
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#include <unistd.h>
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static int
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do_test (void)
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{
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void *handle = dlopen ("tst-latepthreadmod.so", RTLD_LOCAL | RTLD_LAZY);
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if (handle == NULL)
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{
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printf ("error: dlopen failed: %s\n", dlerror ());
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return 1;
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}
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void *ptr = dlsym (handle, "trigger_dynlink_failure");
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if (ptr == NULL)
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{
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printf ("error: dlsym failed: %s\n", dlerror ());
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return 1;
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}
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int (*func) (void) = ptr;
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/* Run the actual test in a subprocess, to capture the error. */
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int fds[2];
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if (pipe (fds) < 0)
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{
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printf ("error: pipe: %m\n");
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return 1;
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}
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pid_t pid = fork ();
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if (pid < 0)
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{
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printf ("error: fork: %m\n");
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return 1;
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}
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else if (pid == 0)
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{
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if (dup2 (fds[1], STDERR_FILENO) < 0)
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_exit (2);
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/* Trigger an abort. */
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func ();
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_exit (3);
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}
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/* NB: This assumes that the abort message is so short that the pipe
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does not block. */
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int status;
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if (waitpid (pid, &status, 0) < 0)
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{
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printf ("error: waitpid: %m\n");
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return 1;
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}
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/* Check the printed error message. */
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if (close (fds[1]) < 0)
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{
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printf ("error: close: %m\n");
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return 1;
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}
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char buf[512];
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/* Leave room for the NUL terminator. */
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ssize_t ret = read (fds[0], buf, sizeof (buf) - 1);
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if (ret < 0)
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{
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printf ("error: read: %m\n");
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return 1;
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}
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if (ret > 0 && buf[ret - 1] == '\n')
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--ret;
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buf[ret] = '\0';
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printf ("info: exit status: %d, message: %s\n", status, buf);
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if (strstr (buf, "undefined symbol: this_function_is_not_defined") == NULL)
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{
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printf ("error: message does not contain expected string\n");
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return 1;
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}
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if (!WIFEXITED (status) || WEXITSTATUS (status) != 127)
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{
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printf ("error: unexpected process exit status\n");
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return 1;
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}
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return 0;
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}
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#define TEST_FUNCTION do_test ()
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#include "../test-skeleton.c"
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