diff options
| -rw-r--r-- | ChangeLog | 18 | ||||
| -rw-r--r-- | dlfcn/dlerror.c | 6 | ||||
| -rw-r--r-- | elf/dl-deps.c | 31 | ||||
| -rw-r--r-- | elf/dl-error.c | 30 | ||||
| -rw-r--r-- | elf/dl-libc.c | 11 | ||||
| -rw-r--r-- | elf/dl-open.c | 15 | ||||
| -rw-r--r-- | elf/rtld.c | 32 | ||||
| -rw-r--r-- | include/dlfcn.h | 6 |
8 files changed, 108 insertions, 41 deletions
@@ -1,3 +1,21 @@ +2005-06-12 Ulrich Drepper <drepper@redhat.com> + + * elf/dl-error.c (_dl_signal_error): Store information about use of + real malloc in the catch object. + (_dl_catch_error): Forward information about malloc use to caller + in new parameter. + (_dl_out_of_memory): Make static. + * elf/dl-deps.c: Adjust callers of _dl_catch_error. + * elf/dl-libc.c: Likewise. + * elf/dl-open.c: Likewise. + * elf/rtld.c: Likewise. + Add new --audit option. + * sysdeps/generic/ldsodefs.h: Remove _dl_out_of_memory declaration. + (rtld_global_ro._dl_signal_error): Add new parameter. + * include/dlfcn.h (_dl_catch_error): Add new parameter. + * dlfcn/dlfcn.c (_dlerror_run): Pass additional parameter to + _dl_catch_error. Only free if the returned newly value says so. + 2005-06-01 Roland McGrath <roland@redhat.com> [BZ #959] diff --git a/dlfcn/dlerror.c b/dlfcn/dlerror.c index 1254381f2b..7ea31d4392 100644 --- a/dlfcn/dlerror.c +++ b/dlfcn/dlerror.c @@ -19,6 +19,7 @@ #include <dlfcn.h> #include <libintl.h> +#include <stdbool.h> #include <stdio.h> #include <stdlib.h> #include <string.h> @@ -40,6 +41,7 @@ struct dl_action_result { int errcode; int returned; + bool malloced; const char *objname; const char *errstring; }; @@ -154,13 +156,13 @@ _dlerror_run (void (*operate) (void *), void *args) { /* Free the error string from the last failed command. This can happen if `dlerror' was not run after an error was found. */ - if (strcmp (result->errstring, "out of memory") != 0) + if (result->malloced) free ((char *) result->errstring); result->errstring = NULL; } result->errcode = GLRO(dl_catch_error) (&result->objname, &result->errstring, - operate, args); + &result->malloced, operate, args); /* If no error we mark that no error string is available. */ result->returned = result->errstring == NULL; diff --git a/elf/dl-deps.c b/elf/dl-deps.c index 50d7a0e71c..a73e21db7b 100644 --- a/elf/dl-deps.c +++ b/elf/dl-deps.c @@ -235,16 +235,22 @@ _dl_map_object_deps (struct link_map *map, { /* Map in the needed object. */ struct link_map *dep; - int err; /* Recognize DSTs. */ name = expand_dst (l, strtab + d->d_un.d_val, 0); /* Store the tag in the argument structure. */ args.name = name; - err = _dl_catch_error (&objname, &errstring, openaux, &args); + bool malloced; + int err = _dl_catch_error (&objname, &errstring, &malloced, + openaux, &args); if (__builtin_expect (errstring != NULL, 0)) { + char *new_errstring = strdupa (errstring); + if (malloced) + free ((char *) errstring); + errstring = new_errstring; + if (err) errno_reason = err; else @@ -288,8 +294,6 @@ _dl_map_object_deps (struct link_map *map, if (d->d_tag == DT_AUXILIARY) { - int err; - /* Say that we are about to load an auxiliary library. */ if (__builtin_expect (GLRO(dl_debug_mask) & DL_DEBUG_LIBS, 0)) @@ -301,13 +305,14 @@ _dl_map_object_deps (struct link_map *map, /* We must be prepared that the addressed shared object is not available. */ - err = _dl_catch_error (&objname, &errstring, openaux, - &args); + bool malloced; + (void) _dl_catch_error (&objname, &errstring, &malloced, + openaux, &args); if (__builtin_expect (errstring != NULL, 0)) { /* We are not interested in the error message. */ assert (errstring != NULL); - if (errstring != _dl_out_of_memory) + if (malloced) free ((char *) errstring); /* Simply ignore this error and continue the work. */ @@ -316,8 +321,6 @@ _dl_map_object_deps (struct link_map *map, } else { - int err; - /* Say that we are about to load an auxiliary library. */ if (__builtin_expect (GLRO(dl_debug_mask) & DL_DEBUG_LIBS, 0)) @@ -328,10 +331,16 @@ _dl_map_object_deps (struct link_map *map, ? l->l_name : rtld_progname); /* For filter objects the dependency must be available. */ - err = _dl_catch_error (&objname, &errstring, openaux, - &args); + bool malloced; + int err = _dl_catch_error (&objname, &errstring, &malloced, + openaux, &args); if (__builtin_expect (errstring != NULL, 0)) { + char *new_errstring = strdupa (errstring); + if (malloced) + free ((char *) errstring); + errstring = new_errstring; + if (err) errno_reason = err; else diff --git a/elf/dl-error.c b/elf/dl-error.c index 993b7c29ab..a63d801411 100644 --- a/elf/dl-error.c +++ b/elf/dl-error.c @@ -19,6 +19,7 @@ #include <libintl.h> #include <setjmp.h> +#include <stdbool.h> #include <stdlib.h> #include <string.h> #include <unistd.h> @@ -30,6 +31,8 @@ struct catch { const char *objname; /* Object/File name. */ const char *errstring; /* Error detail filled in here. */ + bool malloced; /* Nonzero if the string is malloced + by the libc malloc. */ jmp_buf env; /* longjmp here on error. */ }; @@ -44,8 +47,7 @@ struct catch /* This message we return as a last resort. We define the string in a variable since we have to avoid freeing it and so have to enable a pointer comparison. See below and in dlfcn/dlerror.c. */ -const char _dl_out_of_memory[] = "out of memory"; -rtld_hidden_data_def (_dl_out_of_memory) +static const char _dl_out_of_memory[] = "out of memory"; /* This points to a function which is called when an continuable error is @@ -87,15 +89,27 @@ _dl_signal_error (int errcode, const char *objname, const char *occation, lcatch->errstring = (char *) malloc (len_objname + len_errstring); if (lcatch->errstring != NULL) - /* Make a copy of the object file name and the error string. */ - lcatch->objname = memcpy (__mempcpy ((char *) lcatch->errstring, - errstring, len_errstring), - objname, len_objname); + { + /* Make a copy of the object file name and the error string. */ + lcatch->objname = memcpy (__mempcpy ((char *) lcatch->errstring, + errstring, len_errstring), + objname, len_objname); + + /* If the main executable is relocated it means the libc's malloc + is used. */ +#ifdef SHARED + lcatch->malloced = (GL(dl_ns)[LM_ID_BASE]._ns_loaded->l_relocated + != 0); +#else + lcatch->malloced = true; +#endif + } else { /* This is better than nothing. */ lcatch->objname = ""; lcatch->errstring = _dl_out_of_memory; + lcatch->malloced = false; } longjmp (lcatch->env, errcode ?: -1); } @@ -140,7 +154,7 @@ _dl_signal_cerror (int errcode, const char *objname, const char *occation, int internal_function _dl_catch_error (const char **objname, const char **errstring, - void (*operate) (void *), void *args) + bool *mallocedp, void (*operate) (void *), void *args) { int errcode; struct catch *volatile old; @@ -162,6 +176,7 @@ _dl_catch_error (const char **objname, const char **errstring, *catchp = old; *objname = NULL; *errstring = NULL; + *mallocedp = false; return 0; } @@ -169,6 +184,7 @@ _dl_catch_error (const char **objname, const char **errstring, *catchp = old; *objname = c.objname; *errstring = c.errstring; + *mallocedp = c.malloced; return errcode == -1 ? 0 : errcode; } diff --git a/elf/dl-libc.c b/elf/dl-libc.c index 5e76069139..1b995eda92 100644 --- a/elf/dl-libc.c +++ b/elf/dl-libc.c @@ -1,5 +1,5 @@ /* Handle loading and unloading shared objects for internal libc purposes. - Copyright (C) 1999, 2000, 2001, 2002, 2004 Free Software Foundation, Inc. + Copyright (C) 1999,2000,2001,2002,2004,2005 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Zack Weinberg <zack@rabi.columbia.edu>, 1999. @@ -42,12 +42,13 @@ dlerror_run (void (*operate) (void *), void *args) { const char *objname; const char *last_errstring = NULL; - int result; + bool malloced; - (void) GLRO(dl_catch_error) (&objname, &last_errstring, operate, args); + (void) GLRO(dl_catch_error) (&objname, &last_errstring, &malloced, + operate, args); - result = last_errstring != NULL; - if (result && last_errstring != _dl_out_of_memory) + int result = last_errstring != NULL; + if (result && malloced) free ((char *) last_errstring); return result; diff --git a/elf/dl-open.c b/elf/dl-open.c index a65690e5a3..984f4a4ec6 100644 --- a/elf/dl-open.c +++ b/elf/dl-open.c @@ -504,11 +504,6 @@ void * _dl_open (const char *file, int mode, const void *caller_dlopen, Lmid_t nsid, int argc, char *argv[], char *env[]) { - struct dl_open_args args; - const char *objname; - const char *errstring; - int errcode; - if ((mode & RTLD_BINDING_MASK) == 0) /* One of the flags must be set. */ _dl_signal_error (EINVAL, file, NULL, N_("invalid mode for dlopen()")); @@ -543,6 +538,7 @@ no more namespaces available for dlmopen()")); _dl_signal_error (EINVAL, file, NULL, N_("invalid target namespace in dlmopen()")); + struct dl_open_args args; args.file = file; args.mode = mode; args.caller_dlopen = caller_dlopen; @@ -552,7 +548,12 @@ no more namespaces available for dlmopen()")); args.argc = argc; args.argv = argv; args.env = env; - errcode = _dl_catch_error (&objname, &errstring, dl_open_worker, &args); + + const char *objname; + const char *errstring; + bool malloced; + int errcode = _dl_catch_error (&objname, &errstring, &malloced, + dl_open_worker, &args); #ifndef MAP_COPY /* We must munmap() the cache file. */ @@ -603,7 +604,7 @@ no more namespaces available for dlmopen()")); memcpy (local_errstring, errstring, len_errstring); } - if (errstring != _dl_out_of_memory) + if (malloced) free ((char *) errstring); assert (_dl_debug_initialize (0, args.nsid)->r_state == RT_CONSISTENT); diff --git a/elf/rtld.c b/elf/rtld.c index 615eb91fca..03096a38d8 100644 --- a/elf/rtld.c +++ b/elf/rtld.c @@ -61,6 +61,9 @@ static void print_missing_version (int errcode, const char *objname, /* Print the various times we collected. */ static void print_statistics (hp_timing_t *total_timep); +/* Add audit objects. */ +static void process_dl_audit (char *str); + /* This is a list of all the modes the dynamic loader can be in. */ enum mode { normal, list, verify, trace }; @@ -771,6 +774,7 @@ do_preload (char *fname, struct link_map *main_map, const char *where) const char *objname; const char *err_str = NULL; struct map_args args; + bool malloced; args.str = fname; args.loader = main_map; @@ -779,7 +783,7 @@ do_preload (char *fname, struct link_map *main_map, const char *where) unsigned int old_nloaded = GL(dl_ns)[LM_ID_BASE]._ns_nloaded; - (void) _dl_catch_error (&objname, &err_str, map_doit, &args); + (void) _dl_catch_error (&objname, &err_str, &malloced, map_doit, &args); if (__builtin_expect (err_str != NULL, 0)) { _dl_error_printf ("\ @@ -927,6 +931,14 @@ dl_main (const ElfW(Phdr) *phdr, _dl_argc -= 2; INTUSE(_dl_argv) += 2; } + else if (! strcmp (INTUSE(_dl_argv)[1], "--audit") && _dl_argc > 2) + { + process_dl_audit (INTUSE(_dl_argv)[2]); + + _dl_skip_args += 2; + _dl_argc -= 2; + INTUSE(_dl_argv) += 2; + } else break; @@ -983,12 +995,14 @@ of this helper program; chances are you did not intend to run this program.\n\ const char *objname; const char *err_str = NULL; struct map_args args; + bool malloced; args.str = rtld_progname; args.loader = NULL; args.is_preloaded = 0; args.mode = __RTLD_OPENEXEC; - (void) _dl_catch_error (&objname, &err_str, map_doit, &args); + (void) _dl_catch_error (&objname, &err_str, &malloced, map_doit, + &args); if (__builtin_expect (err_str != NULL, 0)) /* We don't free the returned string, the programs stops anyway. */ @@ -1398,14 +1412,17 @@ ld.so does not support TLS, but program uses it!\n"); const char *objname; const char *err_str = NULL; - (void) _dl_catch_error (&objname, &err_str, dlmopen_doit, &dlmargs); + bool malloced; + (void) _dl_catch_error (&objname, &err_str, &malloced, dlmopen_doit, + &dlmargs); if (__builtin_expect (err_str != NULL, 0)) { not_loaded: _dl_error_printf ("\ ERROR: ld.so: object '%s' cannot be loaded as audit interface: %s; ignored.\n", al->name, err_str); - free ((char *) err_str); + if (malloced) + free ((char *) err_str); } else { @@ -1414,7 +1431,8 @@ ERROR: ld.so: object '%s' cannot be loaded as audit interface: %s; ignored.\n", largs.map = dlmargs.map; /* Check whether the interface version matches. */ - (void) _dl_catch_error (&objname, &err_str, lookup_doit, &largs); + (void) _dl_catch_error (&objname, &err_str, &malloced, + lookup_doit, &largs); unsigned int (*laversion) (unsigned int); unsigned int lav; @@ -1455,8 +1473,8 @@ ERROR: ld.so: object '%s' cannot be loaded as audit interface: %s; ignored.\n", do { largs.name = cp; - (void) _dl_catch_error (&objname, &err_str, lookup_doit, - &largs); + (void) _dl_catch_error (&objname, &err_str, &malloced, + lookup_doit, &largs); /* Store the pointer. */ if (err_str == NULL && largs.result != NULL) diff --git a/include/dlfcn.h b/include/dlfcn.h index 460c037ed1..9144dd2f3f 100644 --- a/include/dlfcn.h +++ b/include/dlfcn.h @@ -1,6 +1,7 @@ #ifndef _DLFCN_H #include <dlfcn/dlfcn.h> #include <link.h> /* For ElfW. */ +#include <stdbool.h> /* Internally used flag. */ #define __RTLD_DLOPEN 0x80000000 @@ -67,9 +68,10 @@ extern void *_dl_vsym (void *handle, const char *name, const char *version, and the error code passed is the return value and *OBJNAME is set to the object name which experienced the problems. ERRSTRING if nonzero points to a malloc'ed string which the caller has to free after use. - ARGS is passed as argument to OPERATE. */ + ARGS is passed as argument to OPERATE. MALLOCEDP is set to true only + if the returned string is allocated using the libc's malloc. */ extern int _dl_catch_error (const char **objname, const char **errstring, - void (*operate) (void *), + bool *mallocedp, void (*operate) (void *), void *args) internal_function; |