diff options
Diffstat (limited to 'elf')
| -rw-r--r-- | elf/Makefile | 9 | ||||
| -rw-r--r-- | elf/dl-close.c | 9 | ||||
| -rw-r--r-- | elf/dl-deps.c | 54 | ||||
| -rw-r--r-- | elf/dl-open.c | 12 | ||||
| -rw-r--r-- | elf/neededobj5.c | 5 | ||||
| -rw-r--r-- | elf/neededobj6.c | 7 | ||||
| -rw-r--r-- | elf/neededtest4.c | 156 |
7 files changed, 232 insertions, 20 deletions
diff --git a/elf/Makefile b/elf/Makefile index 6359f22270..459d986e53 100644 --- a/elf/Makefile +++ b/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 diff --git a/elf/dl-close.c b/elf/dl-close.c index 6c17593a52..cd4e44eef4 100644 --- a/elf/dl-close.c +++ b/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) { diff --git a/elf/dl-deps.c b/elf/dl-deps.c index df1db89796..d7239819a2 100644 --- a/elf/dl-deps.c +++ b/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")); } diff --git a/elf/dl-open.c b/elf/dl-open.c index 931e22625c..d1ccfd4ada 100644 --- a/elf/dl-open.c +++ b/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. */ diff --git a/elf/neededobj5.c b/elf/neededobj5.c new file mode 100644 index 0000000000..2d629b0880 --- /dev/null +++ b/elf/neededobj5.c @@ -0,0 +1,5 @@ +extern void a1_function (void); + +void a1_function (void) +{ +} diff --git a/elf/neededobj6.c b/elf/neededobj6.c new file mode 100644 index 0000000000..639b6f195e --- /dev/null +++ b/elf/neededobj6.c @@ -0,0 +1,7 @@ +extern void a1_function (void); +extern void a2_function (void); + +void a2_function (void) +{ + a1_function (); +} diff --git a/elf/neededtest4.c b/elf/neededtest4.c new file mode 100644 index 0000000000..04ab10e4c9 --- /dev/null +++ b/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; +} |