Update.

2000-12-30  Ulrich Drepper  <drepper@redhat.com>

	* elf/dl-close.c (_dl_close): We can ignore the NODELETE flag if the
	object was not yet initialized.

2000-12-28  H.J. Lu  <hjl@gnu.org>

	* elf/dl-deps.c (_dl_map_object_deps): Make sure the DSO state
	is always consistent even if its dependency is failed.

	* elf/dl-open.c (_dl_open): Increment the open count before
	calling _dl_close () in case of failure.

	* elf/neededtest4.c: New file.
	* elf/neededobj5.c: New file.
	* elf/neededobj6.c: New file.

	* elf/Makefile (distribute): Add neededobj5.c and neededobj6.c.
	(tests): Add neededtest4.
	(modules-names): Add neededobj5 and neededobj6.
	($(objpfx)neededobj6.so): New target.
	($(objpfx)neededtest4): New target.
	($(objpfx)neededtest4.out): New target.

ChangeLog

@@ -1,3 +1,27 @@
+2000-12-30  Ulrich Drepper  <drepper@redhat.com>
+
+	* elf/dl-close.c (_dl_close): We can ignore the NODELETE flag if the
+	object was not yet initialized.
+
+2000-12-28  H.J. Lu  <hjl@gnu.org>
+
+	* elf/dl-deps.c (_dl_map_object_deps): Make sure the DSO state
+	is always consistent even if its dependency is failed.
+
+	* elf/dl-open.c (_dl_open): Increment the open count before
+	calling _dl_close () in case of failure.
+
+	* elf/neededtest4.c: New file.
+	* elf/neededobj5.c: New file.
+	* elf/neededobj6.c: New file.
+
+	* elf/Makefile (distribute): Add neededobj5.c and neededobj6.c.
+	(tests): Add neededtest4.
+	(modules-names): Add neededobj5 and neededobj6.
+	($(objpfx)neededobj6.so): New target.
+	($(objpfx)neededtest4): New target.
+	($(objpfx)neededtest4.out): New target.
+
 2000-12-28  Joseph S. Myers  <jsm28@cam.ac.uk>
 
 	* misc/sys/cdefs.h (__attribute_format_strfmon__): Define.

elf/Makefile

@@ -55,6 +55,7 @@ distribute	:= $(rtld-routines:=.c) dynamic-link.h do-rel.h dl-machine.h \
 		   reldepmod1.c reldepmod2.c reldepmod3.c reldepmod4.c \
 		   nextmod1.c nextmod2.c pathoptobj.c tst-pathopt.sh \
 		   neededobj1.c neededobj2.c neededobj3.c neededobj4.c \
+		   neededobj5.c neededobj6.c \
 		   unload2mod.c unload2dep.c ltglobmod1.c ltglobmod2.c \
 		   testobj.h vismod.h
 
@@ -100,7 +101,7 @@ tests = loadtest restest1 preloadtest loadfail multiload origtest resolvfail \
 	constload1 order $(tests-vis-$(have-protected)) noload filter unload \
 	reldep reldep2 reldep3 next $(tests-nodelete-$(have-z-nodelete)) \
 	$(tests-nodlopen-$(have-z-nodlopen)) neededtest neededtest2 \
-	neededtest3 unload2 lateglobal
+	neededtest3 neededtest4 unload2 lateglobal
 test-srcs = tst-pathopt
 tests-vis-yes = vismain
 tests-nodelete-yes = nodelete
@@ -113,6 +114,7 @@ modules-names = testobj1 testobj2 testobj3 testobj4 testobj5 testobj6 \
 		$(modules-nodlopen-$(have-z-nodlopen)) filtmod1 filtmod2 \
 		reldepmod1 reldepmod2 reldepmod3 reldepmod4 nextmod1 nextmod2 \
 		neededobj1 neededobj2 neededobj3 neededobj4 \
+		neededobj5 neededobj6 \
 		unload2mod unload2dep ltglobmod1 ltglobmod2 pathoptobj
 modules-vis-yes = vismod1 vismod2 vismod3
 modules-nodelete-yes = nodelmod1 nodelmod2 nodelmod3 nodelmod4
@@ -263,6 +265,7 @@ $(objpfx)neededobj2.so: $(objpfx)neededobj1.so $(libdl)
 $(objpfx)neededobj3.so: $(objpfx)neededobj1.so $(objpfx)neededobj2.so $(libdl)
 $(objpfx)neededobj4.so: $(objpfx)neededobj1.so $(objpfx)neededobj2.so \
 			$(objpfx)neededobj3.so $(libdl)
+$(objpfx)neededobj6.so: $(objpfx)neededobj5.so
 $(objpfx)unload2mod.so: $(objpfx)unload2dep.so
 $(objpfx)ltglobmod2.so: $(libdl)
 
@@ -287,6 +290,10 @@ $(objpfx)neededtest3: $(libdl)
 $(objpfx)neededtest3.out: $(objpfx)neededobj1.so $(objpfx)neededobj2.so \
 			  $(objpfx)neededobj3.so $(objpfx)neededobj4.so
 
+neededtest4-ENV = LC_ALL=C LANGUAGE=C
+$(objpfx)neededtest4: $(libdl) $(objpfx)neededobj1.so
+$(objpfx)neededtest4.out: $(objpfx)neededobj5.so $(objpfx)neededobj6.so
+
 $(objpfx)restest1: $(objpfx)testobj1.so $(objpfx)testobj1_1.so $(libdl)
 LDFLAGS-restest1 = -rdynamic
 

elf/dl-close.c

@@ -55,7 +55,7 @@ _dl_close (void *_map)
   unsigned int *new_opencount;
 
   /* First see whether we can remove the object at all.  */
-  if (map->l_flags_1 & DF_1_NODELETE)
+  if ((map->l_flags_1 & DF_1_NODELETE) && map->l_init_called)
     /* Nope.  Do nothing.  */
     return;
 
@@ -101,7 +101,7 @@ _dl_close (void *_map)
     }
   --new_opencount[0];
   for (i = 1; list[i] != NULL; ++i)
-    if (! (list[i]->l_flags_1 & DF_1_NODELETE)
+    if ((! (list[i]->l_flags_1 & DF_1_NODELETE) || ! list[i]->l_init_called)
 	/* Decrement counter.  */
 	&& --new_opencount[i] == 0
 	/* Test whether this object was also loaded directly.  */
@@ -113,7 +113,8 @@ _dl_close (void *_map)
 	struct link_map **dep_list = list[i]->l_searchlist.r_list;
 
 	for (j = 1; j < list[i]->l_searchlist.r_nlist; ++j)
-	  if (! (dep_list[j]->l_flags_1 & DF_1_NODELETE))
+	  if (! (dep_list[j]->l_flags_1 & DF_1_NODELETE)
+	      || ! dep_list[j]->l_init_called)
 	    {
 	      assert (dep_list[j]->l_idx < map->l_searchlist.r_nlist);
 	      --new_opencount[dep_list[j]->l_idx];
@@ -127,7 +128,7 @@ _dl_close (void *_map)
       struct link_map *imap = list[i];
       if (new_opencount[i] == 0 && imap->l_type == lt_loaded
 	  && (imap->l_info[DT_FINI] || imap->l_info[DT_FINI_ARRAY])
-	  && ! (imap->l_flags_1 & DF_1_NODELETE)
+	  && (! (imap->l_flags_1 & DF_1_NODELETE) || ! imap->l_init_called)
 	  /* Skip any half-cooked objects that were never initialized.  */
 	  && imap->l_init_called)
 	{

elf/dl-deps.c

@@ -141,6 +141,10 @@ _dl_map_object_deps (struct link_map *map,
   struct list known[1 + npreloads + 1];
   struct list *runp, *utail, *dtail;
   unsigned int nlist, nduplist, i;
+  /* Object name.  */
+  const char *name;
+  int errno_saved;
+  int errno_reason;
 
   auto inline void preload (struct link_map *map);
 
@@ -192,6 +196,10 @@ _dl_map_object_deps (struct link_map *map,
      The whole process is complicated by the fact that we better
      should use alloca for the temporary list elements.  But using
      alloca means we cannot use recursive function calls.  */
+  errno_saved = errno;
+  errno_reason = 0;
+  errno = 0;
+  name = NULL;
   for (runp = known; runp; )
     {
       struct link_map *l = runp->map;
@@ -227,15 +235,24 @@ _dl_map_object_deps (struct link_map *map,
 		struct link_map *dep;
 		/* Allocate new entry.  */
 		struct list *newp;
-		/* Object name.  */
-		const char *name;
+		const char *objname;
+		const char *errstring;
 
 		/* Recognize DSTs.  */
 		name = expand_dst (l, strtab + d->d_un.d_val, 0);
+		/* Store the tag in the argument structure.  */
+		args.name = name;
 
-		dep = _dl_map_object (l, name, 0,
-				      l->l_type == lt_executable ? lt_library :
-				      l->l_type, trace_mode, 0);
+		if (_dl_catch_error (&objname, &errstring, openaux, &args))
+		  {
+		    if (errno)
+		      errno_reason = errno;
+		    else
+		      errno_reason = -1;
+		    goto out;
+		  }
+		else
+		  dep = args.aux;
 
 		/* Add it in any case to the duplicate list.  */
 		newp = alloca (sizeof (struct list));
@@ -266,18 +283,15 @@ _dl_map_object_deps (struct link_map *map,
 		const char *objname;
 		const char *errstring;
 		struct list *newp;
-		/* Object name.  */
-		const char *name;
 
 		/* Recognize DSTs.  */
 		name = expand_dst (l, strtab + d->d_un.d_val,
 				   d->d_tag == DT_AUXILIARY);
+		/* Store the tag in the argument structure.  */
+		args.name = name;
 
 		if (d->d_tag == DT_AUXILIARY)
 		  {
-		    /* Store the tag in the argument structure.  */
-		    args.name = name;
-
 		    /* Say that we are about to load an auxiliary library.  */
 		    if (__builtin_expect (_dl_debug_libs, 0))
 		      _dl_debug_message (1, "load auxiliary object=",
@@ -310,10 +324,14 @@ _dl_map_object_deps (struct link_map *map,
 					 "\n", NULL);
 
 		    /* For filter objects the dependency must be available.  */
-		    args.aux = _dl_map_object (l, name, 0,
-					       (l->l_type == lt_executable
-						? lt_library : l->l_type),
-					       trace_mode, 0);
+		    if (_dl_catch_error (&objname, &errstring, openaux, &args))
+		      {
+			if (errno)
+			  errno_reason = errno;
+			else
+			  errno_reason = -1;
+			goto out;
+		      }
 		  }
 
 		/* The auxiliary object is actually available.
@@ -460,6 +478,10 @@ _dl_map_object_deps (struct link_map *map,
 	while (runp != NULL && runp->done);
     }
 
+out:
+  if (errno == 0 && errno_saved != 0)
+    __set_errno (errno_saved);
+
   if (map->l_initfini != NULL && map->l_type == lt_loaded)
     {
       /* This object was previously loaded as a dependency and we have
@@ -558,4 +580,8 @@ _dl_map_object_deps (struct link_map *map,
     }
   /* Terminate the list of dependencies.  */
   map->l_initfini[nlist] = NULL;
+
+  if (errno_reason)
+    _dl_signal_error (errno_reason == -1 ? 0 : errno_reason,
+		      name ?: "", N_("cannot load shared object file"));
 }

elf/dl-open.c

@@ -396,7 +396,17 @@ _dl_open (const char *file, int mode, const void *caller)
       /* Remove the object from memory.  It may be in an inconsistent
 	 state if relocation failed, for example.  */
       if (args.map)
-	_dl_close (args.map);
+	{
+	  int i;
+
+	  /* Increment open counters for all objects which did not get
+	     correctly loaded.  */
+	  for (i = 0; i < args.map->l_searchlist.r_nlist; ++i)
+	    if (args.map->l_searchlist.r_list[i]->l_opencount == 0)
+	      args.map->l_searchlist.r_list[i]->l_opencount = 1;
+
+	  _dl_close (args.map);
+	}
 
       /* Make a local copy of the error string so that we can release the
 	 memory allocated for it.  */

elf/neededobj5.c

@@ -0,0 +1,5 @@
+extern void a1_function (void);
+
+void a1_function (void)
+{
+}

elf/neededobj6.c

@@ -0,0 +1,7 @@
+extern void a1_function (void);
+extern void a2_function (void);
+
+void a2_function (void)
+{
+  a1_function ();
+}

elf/neededtest4.c

@@ -0,0 +1,156 @@
+#include <dlfcn.h>
+#include <libintl.h>
+#include <link.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+static int
+check_loaded_objects (const char **loaded)
+{
+  struct link_map *lm;
+  int n;
+  int *found = NULL;
+  int errors = 0;
+
+  for (n = 0; loaded[n]; n++)
+    /* NOTHING */;
+
+  if (n)
+    {
+      found = (int *) alloca (sizeof (int) * n);
+      memset (found, 0, sizeof (int) * n);
+    }
+
+  printf("   Name\n");
+  printf(" --------------------------------------------------------\n");
+  for (lm = _r_debug.r_map; lm; lm = lm->l_next)
+    {
+      if (lm->l_name && lm->l_name[0])
+	printf(" %s, count = %d\n", lm->l_name, (int) lm->l_opencount);
+      if (lm->l_type == lt_loaded && lm->l_name)
+	{
+	  int match = 0;
+	  for (n = 0; loaded[n] != NULL; n++)
+	    {
+	      if (strcmp (basename (loaded[n]), basename (lm->l_name)) == 0)
+	        {
+		  found[n] = 1;
+		  match = 1;
+		  break;
+		}
+	    }
+
+	  if (match == 0)
+	    {
+	      ++errors;
+	      printf ("ERRORS: %s is not unloaded\n", lm->l_name);
+	    }
+	}
+    }
+
+  for (n = 0; loaded[n] != NULL; n++)
+    {
+      if (found[n] == 0)
+        {
+	  ++errors;
+	  printf ("ERRORS: %s is not loaded\n", loaded[n]);
+	}
+    }
+
+  return errors;
+}
+
+extern void c_function (void);
+extern char *dirname (__const char *__filename);
+
+int
+main (int argc, char **argv)
+{
+  void *obj;
+  const char *loaded[] = { NULL, NULL, NULL};
+  int errors = 0;
+  void (*f) (void);
+  const char *dir = dirname (argv [0]);
+  char *oldfilename;
+  char *newfilename;
+
+  c_function ();
+
+  printf ("\nThis is what is in memory now:\n");
+  errors += check_loaded_objects (loaded);
+
+  printf( "Loading shared object neededobj6.so\n");
+  obj = dlopen( "neededobj6.so", RTLD_LAZY);
+  if (obj == NULL)
+    {
+      printf ("%s\n", dlerror ());
+      exit (1);
+    }
+  f = dlsym (obj, "a2_function");
+  if (f == NULL)
+    {
+      printf ("%s\n", dlerror ());
+      exit (1);
+    }
+  f ();
+  loaded[0] = "neededobj5.so";
+  loaded[1] = "neededobj6.so";
+  errors += check_loaded_objects (loaded);
+
+  printf ("Closing neededobj6.so\n");
+  dlclose (obj);
+  loaded[0] = NULL;
+  errors += check_loaded_objects (loaded);
+
+  printf ("Rename neededobj5.so\n");
+  oldfilename = alloca (strlen (dir) + 1 + sizeof ("neededobj5.so"));
+  strcpy (oldfilename, dir);
+  strcat (oldfilename, "/");
+  strcat (oldfilename, "neededobj5.so");
+  newfilename = alloca (strlen (oldfilename) + sizeof (".renamed"));
+  strcpy (newfilename, oldfilename);
+  strcat (newfilename, ".renamed");
+  if (rename (oldfilename, newfilename))
+    {
+      perror ("rename");
+      exit (1);
+    }
+
+  printf( "Loading shared object neededobj6.so\n");
+  obj = dlopen( "neededobj6.so", RTLD_LAZY);
+  if (obj == NULL)
+    printf ("%s\n", dlerror ());
+  else
+    {
+      printf ("neededobj6.so should fail to load\n");
+      exit (1);
+    }
+
+  printf( "Loading shared object neededobj1.so\n");
+  obj = dlopen( "neededobj1.so", RTLD_LAZY);
+  if (obj == NULL)
+    {
+      printf ("%s\n", dlerror ());
+      exit (1);
+    }
+  errors += check_loaded_objects (loaded);
+  f = dlsym (obj, "c_function");
+  if (f == NULL)
+    {
+      printf ("%s\n", dlerror ());
+      exit (1);
+    }
+  f ();
+
+  printf ("Restore neededobj5.so\n");
+  if (rename (newfilename, oldfilename))
+    {
+      perror ("rename");
+      exit (1);
+    }
+
+  if (errors != 0)
+    printf ("%d errors found\n", errors);
+  return errors;
+}