diff options
| -rw-r--r-- | ChangeLog | 8 | ||||
| -rw-r--r-- | stdlib/tst-tls-atexit.c | 30 | ||||
| -rw-r--r-- | support/Makefile | 1 | ||||
| -rw-r--r-- | support/xdlfcn.c | 58 | ||||
| -rw-r--r-- | support/xdlfcn.h | 34 |
5 files changed, 108 insertions, 23 deletions
@@ -1,3 +1,11 @@ +2017-09-20 Paul Pluzhnikov <ppluzhnikov@google.com> + Carlos O'Donell <carlos@redhat.com> + + * support/xdlfcn.h: New file. + * support/xdlfcn.c: New file. + * support/Makefile (libsupport-routines): Add xdlfcn. + * stdlib/tst-tls-atexit.c: Use xdlopen, xdlsym, xdlclose. + 2017-09-20 Joseph Myers <joseph@codesourcery.com> [BZ #20142] diff --git a/stdlib/tst-tls-atexit.c b/stdlib/tst-tls-atexit.c index 6dbf49d460..165909af98 100644 --- a/stdlib/tst-tls-atexit.c +++ b/stdlib/tst-tls-atexit.c @@ -31,7 +31,6 @@ second handle. In the end, the DSO should remain loaded due to the RTLD_NODELETE flag being set in the second dlopen call. */ -#include <dlfcn.h> #include <pthread.h> #include <stdio.h> #include <unistd.h> @@ -39,6 +38,7 @@ #include <errno.h> #include <link.h> #include <stdbool.h> +#include <support/xdlfcn.h> #ifndef NO_DELETE # define LOADED_IS_GOOD false @@ -73,18 +73,12 @@ is_loaded (void) static void * reg_dtor_and_close (void *h) { - void (*reg_dtor) (void) = (void (*) (void)) dlsym (h, "reg_dtor"); - - if (reg_dtor == NULL) - { - printf ("Unable to find symbol: %s\n", dlerror ()); - return (void *) (uintptr_t) 1; - } + void (*reg_dtor) (void) = (void (*) (void)) xdlsym (h, "reg_dtor"); reg_dtor (); #ifndef NO_DELETE - dlclose (h); + xdlclose (h); #endif return NULL; @@ -119,32 +113,22 @@ static int do_test (void) { /* Load the DSO. */ - void *h1 = dlopen (DSO_NAME, RTLD_LAZY); - if (h1 == NULL) - { - printf ("h1: Unable to load DSO: %s\n", dlerror ()); - return 1; - } + void *h1 = xdlopen (DSO_NAME, RTLD_LAZY); #ifndef NO_DELETE if (spawn_thread (h1) != 0) return 1; #endif - void *h2 = dlopen (DSO_NAME, H2_RTLD_FLAGS); - if (h2 == NULL) - { - printf ("h2: Unable to load DSO: %s\n", dlerror ()); - return 1; - } + void *h2 = xdlopen (DSO_NAME, H2_RTLD_FLAGS); #ifdef NO_DELETE if (spawn_thread (h1) != 0) return 1; - dlclose (h1); + xdlclose (h1); #endif - dlclose (h2); + xdlclose (h2); /* Check link maps to ensure that the DSO has unloaded. In the normal case, the DSO should be unloaded if there are no uses. However, if one of the diff --git a/support/Makefile b/support/Makefile index 2ace3fa8cc..027a663000 100644 --- a/support/Makefile +++ b/support/Makefile @@ -65,6 +65,7 @@ libsupport-routines = \ xchroot \ xclose \ xconnect \ + xdlfcn \ xdup2 \ xfclose \ xfopen \ diff --git a/support/xdlfcn.c b/support/xdlfcn.c new file mode 100644 index 0000000000..6e3979983d --- /dev/null +++ b/support/xdlfcn.c @@ -0,0 +1,58 @@ +/* Support functionality for using dlopen/dlclose/dlsym. + Copyright (C) 2017 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 <support/check.h> +#include <support/xdlfcn.h> + +void * +xdlopen (const char *filename, int flags) +{ + void *dso = dlopen (filename, flags); + + if (dso == NULL) + FAIL_EXIT1 ("error: dlopen: %s\n", dlerror ()); + + /* Clear any errors. */ + dlerror (); + + return dso; +} + +void * +xdlsym (void *handle, const char *symbol) +{ + void *sym = dlsym (handle, symbol); + + if (sym == NULL) + FAIL_EXIT1 ("error: dlsym: %s\n", dlerror ()); + + /* Clear any errors. */ + dlerror (); + + return sym; +} + +void +xdlclose (void *handle) +{ + if (dlclose (handle) != 0) + FAIL_EXIT1 ("error: dlclose: %s\n", dlerror ()); + + /* Clear any errors. */ + dlerror (); +} diff --git a/support/xdlfcn.h b/support/xdlfcn.h new file mode 100644 index 0000000000..9bdcb38d3e --- /dev/null +++ b/support/xdlfcn.h @@ -0,0 +1,34 @@ +/* Support functionality for using dlopen/dlclose/dlsym. + Copyright (C) 2017 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/>. */ + +#ifndef SUPPORT_DLOPEN_H +#define SUPPORT_DLOPEN_H + +#include <dlfcn.h> + +__BEGIN_DECLS + +/* Each of these terminates process on failure with relevant error message. */ +void *xdlopen (const char *filename, int flags); +void *xdlsym (void *handle, const char *symbol); +void xdlclose (void *handle); + + +__END_DECLS + +#endif /* SUPPORT_DLOPEN_H */ |