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79e0cd7b3c
If a lazy binding failure happens during the execution of an ELF constructor or destructor, the dynamic loader catches the error and reports it using the dlerror mechanism. This is undesirable because there could be other constructors and destructors that need processing (which are skipped), and the process is in an inconsistent state at this point. Therefore, we have to issue a fatal dynamic loader error error and terminate the process. Note that the _dl_catch_exception in _dl_open is just an inner catch, to roll back some state locally. If called from dlopen, there is still an outer catch, which is why calling _dl_init via call_dl_init and a no-exception is required and cannot be avoiding by moving the _dl_init call directly into _dl_open. _dl_fini does not need changes because it does not install an error handler, so errors are already fatal there. Change-Id: I6b1addfe2e30f50a1781595f046f44173db9491a
85 lines
3.0 KiB
C
85 lines
3.0 KiB
C
/* Test that lazy binding failures in constructors and destructors are fatal.
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Copyright (C) 2019 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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<https://www.gnu.org/licenses/>. */
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#include <dlfcn.h>
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#include <string.h>
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#include <support/capture_subprocess.h>
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#include <support/check.h>
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#include <support/xdlfcn.h>
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static void
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test_constructor (void *closure)
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{
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void *handle = dlopen ("tst-initlazyfailmod.so", RTLD_LAZY);
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if (handle == NULL)
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FAIL_EXIT (2, "dlopen did not terminate the process: %s", dlerror ());
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else
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FAIL_EXIT (2, "dlopen did not terminate the process (%p)", handle);
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}
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static void
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test_destructor (void *closure)
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{
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void *handle = xdlopen ("tst-finilazyfailmod.so", RTLD_LAZY);
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int ret = dlclose (handle);
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const char *message = dlerror ();
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if (message != NULL)
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FAIL_EXIT (2, "dlclose did not terminate the process: %d, %s",
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ret, message);
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else
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FAIL_EXIT (2, "dlopen did not terminate the process: %d", ret);
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}
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static int
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do_test (void)
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{
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{
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struct support_capture_subprocess proc
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= support_capture_subprocess (test_constructor, NULL);
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support_capture_subprocess_check (&proc, "constructor", 127,
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sc_allow_stderr);
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printf ("info: constructor failure output: [[%s]]\n", proc.err.buffer);
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TEST_VERIFY (strstr (proc.err.buffer,
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"tst-initfinilazyfail: symbol lookup error: ")
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!= NULL);
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TEST_VERIFY (strstr (proc.err.buffer,
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"tst-initlazyfailmod.so: undefined symbol:"
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" undefined_function\n") != NULL);
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support_capture_subprocess_free (&proc);
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}
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{
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struct support_capture_subprocess proc
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= support_capture_subprocess (test_destructor, NULL);
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support_capture_subprocess_check (&proc, "destructor", 127,
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sc_allow_stderr);
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printf ("info: destructor failure output: [[%s]]\n", proc.err.buffer);
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TEST_VERIFY (strstr (proc.err.buffer,
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"tst-initfinilazyfail: symbol lookup error: ")
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!= NULL);
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TEST_VERIFY (strstr (proc.err.buffer,
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"tst-finilazyfailmod.so: undefined symbol:"
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" undefined_function\n") != NULL);
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support_capture_subprocess_free (&proc);
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}
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return 0;
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}
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#include <support/test-driver.c>
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