diff options
Diffstat (limited to 'elf')
| -rw-r--r-- | elf/Makefile | 16 | ||||
| -rw-r--r-- | elf/circleload1.c | 146 | ||||
| -rw-r--r-- | elf/circlemod1.c | 7 | ||||
| -rw-r--r-- | elf/circlemod1a.c | 1 | ||||
| -rw-r--r-- | elf/circlemod2.c | 9 | ||||
| -rw-r--r-- | elf/circlemod2a.c | 7 | ||||
| -rw-r--r-- | elf/circlemod3.c | 9 | ||||
| -rw-r--r-- | elf/circlemod3a.c | 1 | ||||
| -rw-r--r-- | elf/dl-lookup.c | 5 |
9 files changed, 199 insertions, 2 deletions
diff --git a/elf/Makefile b/elf/Makefile index 073d1cd8da..f1beff737d 100644 --- a/elf/Makefile +++ b/elf/Makefile @@ -119,7 +119,8 @@ tests = loadtest restest1 preloadtest loadfail multiload origtest resolvfail \ $(tests-nodlopen-$(have-z-nodlopen)) neededtest neededtest2 \ neededtest3 neededtest4 unload2 lateglobal initfirst global \ restest2 next dblload dblunload reldep5 reldep6 reldep7 tst-tls1 \ - tst-tls2 tst-tls3 tst-tls4 tst-tls5 tst-tls6 tst-tls7 tst-tls8 + tst-tls2 tst-tls3 tst-tls4 tst-tls5 tst-tls6 tst-tls7 tst-tls8 \ + circleload1 test-srcs = tst-pathopt tests-vis-yes = vismain tests-nodelete-yes = nodelete @@ -138,7 +139,9 @@ modules-names = testobj1 testobj2 testobj3 testobj4 testobj5 testobj6 \ dblloadmod1 dblloadmod2 dblloadmod3 reldepmod5 reldepmod6 \ reldep6mod0 reldep6mod1 reldep6mod2 reldep6mod3 reldep6mod4 \ reldep7mod1 reldep7mod2 \ - tst-tlsmod1 tst-tlsmod2 tst-tlsmod3 tst-tlsmod4 + tst-tlsmod1 tst-tlsmod2 tst-tlsmod3 tst-tlsmod4 \ + circlemod1 circlemod1a circlemod2 circlemod2a \ + circlemod3 circlemod3a modules-vis-yes = vismod1 vismod2 vismod3 modules-nodelete-yes = nodelmod1 nodelmod2 nodelmod3 nodelmod4 modules-nodlopen-yes = nodlopenmod nodlopenmod2 @@ -361,6 +364,15 @@ endif $(objpfx)constload1: $(libdl) $(objpfx)constload1.out: $(objpfx)constload2.so $(objpfx)constload3.so +$(objpfx)circleload1: $(libdl) +$(objpfx)circleload1.out: $(objpfx)circlemod1.so \ + $(objpfx)circlemod1a.so + +$(objpfx)circlemod1.so: $(objpfx)circlemod2.so +$(objpfx)circlemod2.so: $(objpfx)circlemod3.so +$(objpfx)circlemod1a.so: $(objpfx)circlemod2a.so +$(objpfx)circlemod2a.so: $(objpfx)circlemod3a.so + $(objpfx)order: $(addprefix $(objpfx),dep4.so dep3.so dep2.so dep1.so) $(objpfx)order.out: $(objpfx)order diff --git a/elf/circleload1.c b/elf/circleload1.c new file mode 100644 index 0000000000..60f8fb5bad --- /dev/null +++ b/elf/circleload1.c @@ -0,0 +1,146 @@ +#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; +} + +static int +load_dso (const char **loading, int undef, int flag) +{ + void *obj; + const char *loaded[] = { NULL, NULL, NULL, NULL }; + int errors = 0; + const char *errstring; + + printf ("\nThis is what is in memory now:\n"); + errors += check_loaded_objects (loaded); + + printf ("Loading shared object %s: %s\n", loading [0], + flag == RTLD_LAZY ? "RTLD_LAZY" : "RTLD_NOW"); + obj = dlopen (loading [0], flag); + if (obj == NULL) + { + if (flag == RTLD_LAZY) + { + ++errors; + printf ("ERRORS: dlopen shouldn't fail for RTLD_LAZY\n"); + } + + errstring = dlerror (); + if (strstr (errstring, "undefined symbol") == 0 + || strstr (errstring, "circlemod2_undefined") == 0) + { + ++errors; + printf ("ERRORS: dlopen: `%s': Invalid error string\n", + errstring); + } + else + printf ("dlopen: %s\n", errstring); + } + else + { + if (undef && flag == RTLD_NOW) + { + ++errors; + printf ("ERRORS: dlopen shouldn't work for RTLD_NOW\n"); + } + + loaded[0] = loading [0]; + loaded[1] = loading [1]; + loaded[2] = loading [2]; + } + errors += check_loaded_objects (loaded); + + if (obj) + { + printf ("UnLoading shared object %s\n", loading [0]); + dlclose (obj); + loaded[0] = NULL; + loaded[1] = NULL; + loaded[2] = NULL; + errors += check_loaded_objects (loaded); + } + + return errors; +} + +int +main (void) +{ + int errors = 0; + const char *loading[3]; + + loading [0] = "circlemod1a.so"; + loading [1] = "circlemod2a.so"; + loading [2] = "circlemod3a.so"; + errors += load_dso (loading, 0, RTLD_LAZY); + errors += load_dso (loading, 0, RTLD_NOW); + + loading [0] = "circlemod1.so"; + loading [1] = "circlemod2.so"; + loading [2] = "circlemod3.so"; + errors += load_dso (loading, 1, RTLD_LAZY); + errors += load_dso (loading, 1, RTLD_NOW); + + if (errors != 0) + printf ("%d errors found\n", errors); + + return errors; +} diff --git a/elf/circlemod1.c b/elf/circlemod1.c new file mode 100644 index 0000000000..6b61a4d577 --- /dev/null +++ b/elf/circlemod1.c @@ -0,0 +1,7 @@ +extern void circlemod2 (void); + +void +circlemod1 (void) +{ + circlemod2 (); +} diff --git a/elf/circlemod1a.c b/elf/circlemod1a.c new file mode 100644 index 0000000000..45f229136d --- /dev/null +++ b/elf/circlemod1a.c @@ -0,0 +1 @@ +#include "circlemod1.c" diff --git a/elf/circlemod2.c b/elf/circlemod2.c new file mode 100644 index 0000000000..1c67abceef --- /dev/null +++ b/elf/circlemod2.c @@ -0,0 +1,9 @@ +extern void circlemod2_undefined (void); +extern void circlemod3 (void); + +void +circlemod2 (void) +{ + circlemod2_undefined (); + circlemod3 (); +} diff --git a/elf/circlemod2a.c b/elf/circlemod2a.c new file mode 100644 index 0000000000..f8664a9260 --- /dev/null +++ b/elf/circlemod2a.c @@ -0,0 +1,7 @@ +extern void circlemod3 (void); + +void +circlemod2 (void) +{ + circlemod3 (); +} diff --git a/elf/circlemod3.c b/elf/circlemod3.c new file mode 100644 index 0000000000..6ac00a0296 --- /dev/null +++ b/elf/circlemod3.c @@ -0,0 +1,9 @@ +extern void circlemod1 (void); +extern void circlemod2 (void); + +void +circlemod3 (void) +{ + circlemod1 (); + circlemod2 (); +} diff --git a/elf/circlemod3a.c b/elf/circlemod3a.c new file mode 100644 index 0000000000..f1b166ef84 --- /dev/null +++ b/elf/circlemod3a.c @@ -0,0 +1 @@ +#include "circlemod3.c" diff --git a/elf/dl-lookup.c b/elf/dl-lookup.c index b21eeb097a..773f73df9b 100644 --- a/elf/dl-lookup.c +++ b/elf/dl-lookup.c @@ -94,6 +94,11 @@ add_dependency (struct link_map *undef_map, struct link_map *map) if (undef_map == map) return 0; + /* Don't create cross-reference between modules which are + dynamically loaded by the same dlopen() call. */ + if (undef_map->l_opencount == 0 && map->l_opencount == 0) + return 0; + /* Make sure nobody can unload the object while we are at it. */ __libc_lock_lock_recursive (GL(dl_load_lock)); |