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/* Check that dlfcn errors are reported properly after dlmopen.
Copyright (C) 2021-2024 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <stddef.h>
#include <string.h>
#include <support/check.h>
#include <support/xdlfcn.h>
static int
do_test (void)
{
void *handle = xdlmopen (LM_ID_NEWLM, "tst-dlmopen-dlerror-mod.so",
RTLD_NOW);
void (*call_dlsym) (const char *name) = xdlsym (handle, "call_dlsym");
void (*call_dlopen) (const char *name) = xdlsym (handle, "call_dlopen");
/* Iterate over various name lengths. This changes the size of
error messages allocated by ld.so and has been shown to trigger
detectable heap corruption if malloc/free calls in different
namespaces are mixed. */
char buffer[2048];
char *buffer_end = &buffer[sizeof (buffer) - 2];
for (char *p = stpcpy (buffer, "does not exist "); p < buffer_end; ++p)
{
p[0] = 'X';
p[1] = '\0';
call_dlsym (buffer);
call_dlopen (buffer);
}
return 0;
}
#include <support/test-driver.c>
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