mirror of
https://sourceware.org/git/glibc.git
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* elf/dl-close.c: Include stddef.h.
(_dl_close): If called recursively, just remember GC needs to be rerun and decrease l_direct_opencount. Avoid GC if l_direct_opencount decreased to 1. Rerun GC at the end if any destructor unloaded some additional libraries. * elf/Makefile: Add rules to build and run unload6 test. * elf/unload6.c: New test. * elf/unload6mod1.c: New file. * elf/unload6mod2.c: New file. * elf/unload6mod3.c: New file. * malloc/hooks.c (mem2chunk_check): Add magic_p argument, set *magic_p if magic_p is not NULL. (top_check): Invoke MALLOC_FAILURE_ACTION if MORECORE failed. (malloc_check): Fail if sz == -1. (free_check): Adjust mem2chunk_check caller. (realloc_check): Likewise. Fail if bytes == -1. If bytes == 0 and oldmem != NULL, call free_check and return NULL. If reallocating and returning NULL, invert magic byte again to make oldmem valid region for further checking. (memalign_check): Fail if bytes == -1. * malloc/Makefile: Add rules to build and run tst-mcheck. * malloc/tst-mcheck.c: New test.
This commit is contained in:
Ulrich Drepper
parent
462be6908c
commit
bfc832ccf1
26
ChangeLog
26
ChangeLog
@ -1,3 +1,29 @@
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2005-04-26 Jakub Jelinek <jakub@redhat.com>
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* elf/dl-close.c: Include stddef.h.
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(_dl_close): If called recursively, just remember GC needs to be rerun
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and decrease l_direct_opencount. Avoid GC if l_direct_opencount
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decreased to 1. Rerun GC at the end if any destructor unloaded some
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additional libraries.
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* elf/Makefile: Add rules to build and run unload6 test.
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* elf/unload6.c: New test.
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* elf/unload6mod1.c: New file.
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* elf/unload6mod2.c: New file.
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* elf/unload6mod3.c: New file.
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* malloc/hooks.c (mem2chunk_check): Add magic_p argument, set *magic_p
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if magic_p is not NULL.
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(top_check): Invoke MALLOC_FAILURE_ACTION if MORECORE failed.
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(malloc_check): Fail if sz == -1.
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(free_check): Adjust mem2chunk_check caller.
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(realloc_check): Likewise. Fail if bytes == -1. If bytes == 0 and
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oldmem != NULL, call free_check and return NULL. If reallocating
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and returning NULL, invert magic byte again to make oldmem valid
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region for further checking.
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(memalign_check): Fail if bytes == -1.
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* malloc/Makefile: Add rules to build and run tst-mcheck.
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* malloc/tst-mcheck.c: New test.
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2005-04-26 Ulrich Drepper <drepper@redhat.com>
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* stdio-common/vfscanf.c: Correctly account for characters of
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12
elf/Makefile
12
elf/Makefile
@ -86,7 +86,7 @@ distribute := rtld-Rules \
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tst-deep1mod1.c tst-deep1mod2.c tst-deep1mod3.c \
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unload3mod1.c unload3mod2.c unload3mod3.c unload3mod4.c \
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unload4mod1.c unload4mod2.c unload4mod3.c unload4mod4.c \
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tst-auditmod1.c \
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unload6mod1.c unload6mod2.c unload6mod3.c tst-auditmod1.c \
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order2mod1.c order2mod2.c order2mod3.c order2mod4.c
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CFLAGS-dl-runtime.c = -fexceptions -fasynchronous-unwind-tables
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@ -162,7 +162,7 @@ tests += loadtest restest1 preloadtest loadfail multiload origtest resolvfail \
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tst-tls10 tst-tls11 tst-tls12 tst-tls13 tst-tls14 tst-tls15 tst-align \
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tst-align2 $(tests-execstack-$(have-z-execstack)) tst-dlmodcount \
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tst-dlopenrpath tst-deep1 tst-dlmopen1 tst-dlmopen2 tst-dlmopen3 \
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unload3 unload4 unload5 tst-audit1 tst-global1 order2
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unload3 unload4 unload5 unload6 tst-audit1 tst-global1 order2
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# reldep9
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test-srcs = tst-pathopt
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tests-vis-yes = vismain
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@ -201,6 +201,7 @@ modules-names = testobj1 testobj2 testobj3 testobj4 testobj5 testobj6 \
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tst-dlmopen1mod tst-auditmod1 \
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unload3mod1 unload3mod2 unload3mod3 unload3mod4 \
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unload4mod1 unload4mod2 unload4mod3 unload4mod4 \
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unload6mod1 unload6mod2 unload6mod3 \
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order2mod1 order2mod2 order2mod3 order2mod4
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ifeq (yes,$(have-initfini-array))
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modules-names += tst-array2dep
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@ -438,6 +439,9 @@ $(objpfx)unload3mod2.so: $(objpfx)unload3mod3.so
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$(objpfx)unload3mod3.so: $(objpfx)unload3mod4.so
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$(objpfx)unload4mod1.so: $(objpfx)unload4mod2.so $(objpfx)unload4mod3.so
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$(objpfx)unload4mod2.so: $(objpfx)unload4mod4.so $(objpfx)unload4mod3.so
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$(objpfx)unload6mod1.so: $(libdl)
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$(objpfx)unload6mod2.so: $(libdl)
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$(objpfx)unload6mod3.so: $(libdl)
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LDFLAGS-tst-tlsmod5.so = -nostdlib
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LDFLAGS-tst-tlsmod6.so = -nostdlib
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@ -710,6 +714,10 @@ $(objpfx)unload5: $(libdl)
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$(objpfx)unload5.out: $(objpfx)unload3mod1.so $(objpfx)unload3mod2.so \
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$(objpfx)unload3mod3.so $(objpfx)unload3mod4.so
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$(objpfx)unload6: $(libdl)
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$(objpfx)unload6.out: $(objpfx)unload6mod1.so $(objpfx)unload6mod2.so \
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$(objpfx)unload6mod3.so
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ifdef libdl
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$(objpfx)tst-tls9-static: $(common-objpfx)dlfcn/libdl.a
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$(objpfx)tst-tls9-static.out: $(objpfx)tst-tlsmod5.so $(objpfx)tst-tlsmod6.so
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@ -20,6 +20,7 @@
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#include <assert.h>
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#include <dlfcn.h>
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#include <libintl.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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@ -105,10 +106,6 @@ _dl_close (void *_map)
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struct link_map *map = _map;
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Lmid_t ns = map->l_ns;
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unsigned int i;
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#ifdef USE_TLS
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bool any_tls = false;
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#endif
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/* First see whether we can remove the object at all. */
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if (__builtin_expect (map->l_flags_1 & DF_1_NODELETE, 0)
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&& map->l_init_called)
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@ -124,9 +121,17 @@ _dl_close (void *_map)
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/* One less direct use. */
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--map->l_direct_opencount;
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/* Decrement the reference count. */
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if (map->l_direct_opencount > 1 || map->l_type != lt_loaded)
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/* If _dl_close is called recursively (some destructor call dlclose),
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just record that the parent _dl_close will need to do garbage collection
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again and return. */
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static enum { not_pending, pending, rerun } dl_close_state;
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if (map->l_direct_opencount > 0 || map->l_type != lt_loaded
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|| dl_close_state != not_pending)
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{
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if (map->l_direct_opencount == 0 && map->l_type == lt_loaded)
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dl_close_state = rerun;
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/* There are still references to this object. Do nothing more. */
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if (__builtin_expect (GLRO(dl_debug_mask) & DL_DEBUG_FILES, 0))
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_dl_debug_printf ("\nclosing file=%s; direct_opencount=%u\n",
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@ -136,12 +141,18 @@ _dl_close (void *_map)
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return;
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}
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retry:
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dl_close_state = pending;
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#ifdef USE_TLS
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bool any_tls = false;
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#endif
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const unsigned int nloaded = GL(dl_ns)[ns]._ns_nloaded;
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char used[nloaded];
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char done[nloaded];
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struct link_map *maps[nloaded];
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/* Run over the list and assign indeces to the link maps and enter
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/* Run over the list and assign indexes to the link maps and enter
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them into the MAPS array. */
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int idx = 0;
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for (struct link_map *l = GL(dl_ns)[ns]._ns_loaded; l != NULL; l = l->l_next)
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@ -302,7 +313,7 @@ _dl_close (void *_map)
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if (imap->l_searchlist.r_list == NULL
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&& imap->l_initfini != NULL)
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{
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/* The object is still used. But the object we are
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/* The object is still used. But one of the objects we are
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unloading right now is responsible for loading it. If
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the current object does not have it's own scope yet we
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have to create one. This has to be done before running
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@ -318,15 +329,27 @@ _dl_close (void *_map)
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imap->l_searchlist.r_nlist = cnt;
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for (cnt = 0; imap->l_scope[cnt] != NULL; ++cnt)
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if (imap->l_scope[cnt] == &map->l_searchlist)
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/* This relies on l_scope[] entries being always set either
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to its own l_symbolic_searchlist address, or some other map's
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l_searchlist address. */
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if (imap->l_scope[cnt] != &imap->l_symbolic_searchlist)
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{
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imap->l_scope[cnt] = &imap->l_searchlist;
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break;
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struct link_map *tmap;
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tmap = (struct link_map *) ((char *) imap->l_scope[cnt]
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- offsetof (struct link_map,
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l_searchlist));
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assert (tmap->l_ns == ns);
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if (tmap->l_idx != -1)
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{
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imap->l_scope[cnt] = &imap->l_searchlist;
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break;
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}
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}
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}
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/* The loader is gone, so mark the object as not having one.
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Note: l_idx == -1 -> object will be removed. */
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Note: l_idx != -1 -> object will be removed. */
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if (imap->l_loader != NULL && imap->l_loader->l_idx != -1)
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imap->l_loader = NULL;
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@ -583,8 +606,12 @@ _dl_close (void *_map)
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r->r_state = RT_CONSISTENT;
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_dl_debug_state ();
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/* Release the lock. */
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/* Recheck if we need to retry, release the lock. */
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out:
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if (dl_close_state == rerun)
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goto retry;
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dl_close_state = not_pending;
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__rtld_lock_unlock_recursive (GL(dl_load_lock));
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}
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@ -654,7 +681,7 @@ libc_freeres_fn (free_mem)
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free_slotinfo (&GL(dl_tls_dtv_slotinfo_list));
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else
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# endif
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/* The first element of the list does not have to be deallocated.
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/* The first element of the list does not have to be deallocated.
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It was allocated in the dynamic linker (i.e., with a different
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malloc), and in the static library it's in .bss space. */
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free_slotinfo (&GL(dl_tls_dtv_slotinfo_list)->next);
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30
elf/unload6.c
Normal file
30
elf/unload6.c
Normal file
@ -0,0 +1,30 @@
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#include <dlfcn.h>
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#include <stdio.h>
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int
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main (void)
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{
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void *h = dlopen ("unload6mod1.so", RTLD_LAZY);
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if (h == NULL)
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{
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puts ("dlopen unload6mod1.so failed");
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return 1;
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}
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int (*fn) (int);
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fn = dlsym (h, "foo");
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if (fn == NULL)
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{
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puts ("dlsym failed");
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return 1;
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}
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int val = fn (16);
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if (val != 24)
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{
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printf ("foo returned %d != 24\n", val);
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return 1;
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}
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return 0;
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}
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16
elf/unload6mod1.c
Normal file
16
elf/unload6mod1.c
Normal file
@ -0,0 +1,16 @@
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#include <dlfcn.h>
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#include <stdio.h>
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int
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foo (int i)
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{
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void *h = dlopen ("unload6mod2.so", RTLD_LAZY);
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if (h == NULL)
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{
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puts ("dlopen unload6mod2.so failed");
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return 1;
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}
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dlclose (h);
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return i + 8;
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}
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23
elf/unload6mod2.c
Normal file
23
elf/unload6mod2.c
Normal file
@ -0,0 +1,23 @@
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#include <dlfcn.h>
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#include <stdio.h>
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#include <unistd.h>
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static void *h;
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static void __attribute__((constructor))
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mod2init (void)
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{
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h = dlopen ("unload6mod3.so", RTLD_LAZY);
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if (h == NULL)
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{
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puts ("dlopen unload6mod3.so failed");
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fflush (stdout);
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_exit (1);
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}
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}
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static void __attribute__((destructor))
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mod2fini (void)
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{
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dlclose (h);
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}
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23
elf/unload6mod3.c
Normal file
23
elf/unload6mod3.c
Normal file
@ -0,0 +1,23 @@
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#include <dlfcn.h>
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#include <stdio.h>
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#include <unistd.h>
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static void *h;
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static void __attribute__((constructor))
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mod3init (void)
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{
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h = dlopen ("unload6mod1.so", RTLD_LAZY);
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if (h == NULL)
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{
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puts ("dlopen unload6mod1.so failed");
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fflush (stdout);
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_exit (1);
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}
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}
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static void __attribute__((destructor))
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mod3fini (void)
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{
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dlclose (h);
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}
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@ -1,4 +1,5 @@
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# Copyright (C) 1991-1999,2000,2001,2002,2003 Free Software Foundation, Inc.
|
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# Copyright (C) 1991-1999, 2000, 2001, 2002, 2003, 2005
|
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# Free Software Foundation, Inc.
|
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# This file is part of the GNU C Library.
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|
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# The GNU C Library is free software; you can redistribute it and/or
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@ -26,7 +27,7 @@ all:
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dist-headers := malloc.h
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headers := $(dist-headers) obstack.h mcheck.h
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tests := mallocbug tst-malloc tst-valloc tst-calloc tst-obstack \
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tst-mallocstate
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tst-mallocstate tst-mcheck
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test-srcs = tst-mtrace
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distribute = thread-m.h mtrace.pl mcheck-init.c stackinfo.h memusage.h \
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@ -120,6 +121,8 @@ endif
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endif
|
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endif
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tst-mcheck-ENV = MALLOC_CHECK_=3
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|
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# Uncomment this for test releases. For public releases it is too expensive.
|
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#CPPFLAGS-malloc.o += -DMALLOC_DEBUG=1
|
||||
|
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|
||||
@ -1,5 +1,5 @@
|
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/* Malloc implementation for multiple threads without lock contention.
|
||||
Copyright (C) 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
|
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Copyright (C) 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
|
||||
This file is part of the GNU C Library.
|
||||
Contributed by Wolfram Gloger <wg@malloc.de>, 2001.
|
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|
||||
@ -146,9 +146,9 @@ mem2mem_check(ptr, sz) Void_t *ptr; size_t sz;
|
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static mchunkptr
|
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internal_function
|
||||
#if __STD_C
|
||||
mem2chunk_check(Void_t* mem)
|
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mem2chunk_check(Void_t* mem, unsigned char **magic_p)
|
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#else
|
||||
mem2chunk_check(mem) Void_t* mem;
|
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mem2chunk_check(mem, magic_p) Void_t* mem; unsigned char **magic_p;
|
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#endif
|
||||
{
|
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mchunkptr p;
|
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@ -173,7 +173,6 @@ mem2chunk_check(mem) Void_t* mem;
|
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for(sz += SIZE_SZ-1; (c = ((unsigned char*)p)[sz]) != magic; sz -= c) {
|
||||
if(c<=0 || sz<(c+2*SIZE_SZ)) return NULL;
|
||||
}
|
||||
((unsigned char*)p)[sz] ^= 0xFF;
|
||||
} else {
|
||||
unsigned long offset, page_mask = malloc_getpagesize-1;
|
||||
|
||||
@ -193,8 +192,10 @@ mem2chunk_check(mem) Void_t* mem;
|
||||
for(sz -= 1; (c = ((unsigned char*)p)[sz]) != magic; sz -= c) {
|
||||
if(c<=0 || sz<(c+2*SIZE_SZ)) return NULL;
|
||||
}
|
||||
((unsigned char*)p)[sz] ^= 0xFF;
|
||||
}
|
||||
((unsigned char*)p)[sz] ^= 0xFF;
|
||||
if (magic_p)
|
||||
*magic_p = (unsigned char *)p + sz;
|
||||
return p;
|
||||
}
|
||||
|
||||
@ -232,7 +233,11 @@ top_check()
|
||||
sbrk_size = front_misalign + mp_.top_pad + MINSIZE;
|
||||
sbrk_size += pagesz - ((unsigned long)(brk + sbrk_size) & (pagesz - 1));
|
||||
new_brk = (char*)(MORECORE (sbrk_size));
|
||||
if (new_brk == (char*)(MORECORE_FAILURE)) return -1;
|
||||
if (new_brk == (char*)(MORECORE_FAILURE))
|
||||
{
|
||||
MALLOC_FAILURE_ACTION;
|
||||
return -1;
|
||||
}
|
||||
/* Call the `morecore' hook if necessary. */
|
||||
if (__after_morecore_hook)
|
||||
(*__after_morecore_hook) ();
|
||||
@ -253,6 +258,11 @@ malloc_check(sz, caller) size_t sz; const Void_t *caller;
|
||||
{
|
||||
Void_t *victim;
|
||||
|
||||
if (sz+1 == 0) {
|
||||
MALLOC_FAILURE_ACTION;
|
||||
return NULL;
|
||||
}
|
||||
|
||||
(void)mutex_lock(&main_arena.mutex);
|
||||
victim = (top_check() >= 0) ? _int_malloc(&main_arena, sz+1) : NULL;
|
||||
(void)mutex_unlock(&main_arena.mutex);
|
||||
@ -270,7 +280,7 @@ free_check(mem, caller) Void_t* mem; const Void_t *caller;
|
||||
|
||||
if(!mem) return;
|
||||
(void)mutex_lock(&main_arena.mutex);
|
||||
p = mem2chunk_check(mem);
|
||||
p = mem2chunk_check(mem, NULL);
|
||||
if(!p) {
|
||||
(void)mutex_unlock(&main_arena.mutex);
|
||||
|
||||
@ -302,10 +312,19 @@ realloc_check(oldmem, bytes, caller)
|
||||
mchunkptr oldp;
|
||||
INTERNAL_SIZE_T nb, oldsize;
|
||||
Void_t* newmem = 0;
|
||||
unsigned char *magic_p;
|
||||
|
||||
if (bytes+1 == 0) {
|
||||
MALLOC_FAILURE_ACTION;
|
||||
return NULL;
|
||||
}
|
||||
if (oldmem == 0) return malloc_check(bytes, NULL);
|
||||
if (bytes == 0) {
|
||||
free_check (oldmem, NULL);
|
||||
return NULL;
|
||||
}
|
||||
(void)mutex_lock(&main_arena.mutex);
|
||||
oldp = mem2chunk_check(oldmem);
|
||||
oldp = mem2chunk_check(oldmem, &magic_p);
|
||||
(void)mutex_unlock(&main_arena.mutex);
|
||||
if(!oldp) {
|
||||
malloc_printerr(check_action, "realloc(): invalid pointer", oldmem);
|
||||
@ -357,6 +376,12 @@ realloc_check(oldmem, bytes, caller)
|
||||
#if HAVE_MMAP
|
||||
}
|
||||
#endif
|
||||
|
||||
/* mem2chunk_check changed the magic byte in the old chunk.
|
||||
If newmem is NULL, then the old chunk will still be used though,
|
||||
so we need to invert that change here. */
|
||||
if (newmem == NULL) *magic_p ^= 0xFF;
|
||||
|
||||
(void)mutex_unlock(&main_arena.mutex);
|
||||
|
||||
return mem2mem_check(newmem, bytes);
|
||||
@ -376,6 +401,10 @@ memalign_check(alignment, bytes, caller)
|
||||
if (alignment <= MALLOC_ALIGNMENT) return malloc_check(bytes, NULL);
|
||||
if (alignment < MINSIZE) alignment = MINSIZE;
|
||||
|
||||
if (bytes+1 == 0) {
|
||||
MALLOC_FAILURE_ACTION;
|
||||
return NULL;
|
||||
}
|
||||
checked_request2size(bytes+1, nb);
|
||||
(void)mutex_lock(&main_arena.mutex);
|
||||
mem = (top_check() >= 0) ? _int_memalign(&main_arena, alignment, bytes+1) :
|
||||
|
||||
91
malloc/tst-mcheck.c
Normal file
91
malloc/tst-mcheck.c
Normal file
@ -0,0 +1,91 @@
|
||||
/* Copyright (C) 2005 Free Software Foundation, Inc.
|
||||
This file is part of the GNU C Library.
|
||||
Contributed by Jakub Jelinek <jakub@redhat.com>, 2005.
|
||||
|
||||
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, write to the Free
|
||||
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
||||
02111-1307 USA. */
|
||||
|
||||
#include <errno.h>
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
|
||||
static int errors = 0;
|
||||
|
||||
static void
|
||||
merror (const char *msg)
|
||||
{
|
||||
++errors;
|
||||
printf ("Error: %s\n", msg);
|
||||
}
|
||||
|
||||
int
|
||||
main (void)
|
||||
{
|
||||
void *p, *q;
|
||||
|
||||
errno = 0;
|
||||
|
||||
p = malloc (-1);
|
||||
|
||||
if (p != NULL)
|
||||
merror ("malloc (-1) succeeded.");
|
||||
else if (errno != ENOMEM)
|
||||
merror ("errno is not set correctly.");
|
||||
|
||||
p = malloc (10);
|
||||
if (p == NULL)
|
||||
merror ("malloc (10) failed.");
|
||||
|
||||
p = realloc (p, 0);
|
||||
if (p != NULL)
|
||||
merror ("realloc (p, 0) failed.");
|
||||
|
||||
p = malloc (0);
|
||||
if (p == NULL)
|
||||
merror ("malloc (0) failed.");
|
||||
|
||||
p = realloc (p, 0);
|
||||
if (p != NULL)
|
||||
merror ("realloc (p, 0) failed.");
|
||||
|
||||
q = malloc (256);
|
||||
if (q == NULL)
|
||||
merror ("malloc (256) failed.");
|
||||
|
||||
p = malloc (512);
|
||||
if (p == NULL)
|
||||
merror ("malloc (512) failed.");
|
||||
|
||||
if (realloc (p, -256) != NULL)
|
||||
merror ("realloc (p, -256) succeeded.");
|
||||
else if (errno != ENOMEM)
|
||||
merror ("errno is not set correctly.");
|
||||
|
||||
free (p);
|
||||
|
||||
p = malloc (512);
|
||||
if (p == NULL)
|
||||
merror ("malloc (512) failed.");
|
||||
|
||||
if (realloc (p, -1) != NULL)
|
||||
merror ("realloc (p, -1) succeeded.");
|
||||
else if (errno != ENOMEM)
|
||||
merror ("errno is not set correctly.");
|
||||
|
||||
free (p);
|
||||
free (q);
|
||||
|
||||
return errors != 0;
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user