* [PATCH] Testcase for a ld.so bug
@ 2005-03-03 7:21 Jakub Jelinek
0 siblings, 0 replies; only message in thread
From: Jakub Jelinek @ 2005-03-03 7:21 UTC (permalink / raw)
To: Ulrich Drepper; +Cc: Glibc hackers
Hi!
This testcase shows a bug in the dynamic linker.
During the second dlclose, unload3mod3.so is unloaded, but unload3mod4.so
is not, though unload3mod4.so has a relocation dependency on unload3mod3.so
that has not been recorded because they were both loaded in the same dlopen
call as dependencies.
2005-03-03 Jakub Jelinek <jakub@redhat.com>
* elf/Makefile: Add rules to build and run unload3 test.
* elf/unload3.c: New test.
* elf/unload3mod1.c: New file.
* elf/unload3mod2.c: New file.
* elf/unload3mod3.c: New file.
* elf/unload3mod4.c: New file.
--- libc/elf/Makefile.jj 2005-02-25 14:45:00.000000000 +0100
+++ libc/elf/Makefile 2005-03-03 08:13:13.207849513 +0100
@@ -84,6 +84,7 @@ distribute := rtld-Rules \
tst-execstack-mod.c tst-dlmodcount.c \
check-textrel.c dl-sysdep.h test-dlopenrpathmod.c \
tst-deep1mod1.c tst-deep1mod2.c tst-deep1mod3.c \
+ unload3mod1.c unload3mod2.c unload3mod3.c unload3mod4.c \
tst-auditmod1.c
CFLAGS-dl-runtime.c = -fexceptions -fasynchronous-unwind-tables
@@ -159,7 +160,7 @@ tests += loadtest restest1 preloadtest l
tst-tls10 tst-tls11 tst-tls12 tst-tls13 tst-tls14 tst-align \
tst-align2 $(tests-execstack-$(have-z-execstack)) tst-dlmodcount \
tst-dlopenrpath tst-deep1 tst-dlmopen1 tst-dlmopen2 tst-dlmopen3 \
- tst-audit1
+ unload3 tst-audit1
# reldep9
test-srcs = tst-pathopt
tests-vis-yes = vismain
@@ -194,7 +195,8 @@ modules-names = testobj1 testobj2 testob
tst-alignmod tst-alignmod2 \
$(modules-execstack-$(have-z-execstack)) \
tst-dlopenrpathmod tst-deep1mod1 tst-deep1mod2 tst-deep1mod3 \
- tst-dlmopen1mod tst-auditmod1
+ tst-dlmopen1mod tst-auditmod1 \
+ unload3mod1 unload3mod2 unload3mod3 unload3mod4
ifeq (yes,$(have-initfini-array))
modules-names += tst-array2dep
endif
@@ -426,6 +428,9 @@ $(objpfx)reldep8mod3.so: $(objpfx)reldep
$(objpfx)nodel2mod3.so: $(objpfx)nodel2mod1.so $(objpfx)nodel2mod2.so
$(objpfx)reldep9mod2.so: $(objpfx)reldep9mod1.so
$(objpfx)reldep9mod3.so: $(objpfx)reldep9mod1.so $(objpfx)reldep9mod2.so
+$(objpfx)unload3mod1.so: $(objpfx)unload3mod3.so
+$(objpfx)unload3mod2.so: $(objpfx)unload3mod3.so
+$(objpfx)unload3mod3.so: $(objpfx)unload3mod4.so
LDFLAGS-tst-tlsmod5.so = -nostdlib
LDFLAGS-tst-tlsmod6.so = -nostdlib
@@ -465,6 +470,7 @@ circlemod3.so-no-z-defs = yes
circlemod3a.so-no-z-defs = yes
reldep8mod2.so-no-z-defs = yes
reldep9mod1.so-no-z-defs = yes
+unload3mod4.so-no-z-defs = yes
# filtmod1.so has a special rule
$(filter-out $(objpfx)filtmod1.so, $(test-modules)): $(objpfx)%.so: $(objpfx)%.os
@@ -681,6 +687,10 @@ $(objpfx)tst-align: $(libdl)
$(objpfx)tst-align.out: $(objpfx)tst-alignmod.so
$(objpfx)tst-align2: $(objpfx)tst-alignmod2.so
+$(objpfx)unload3: $(libdl)
+$(objpfx)unload3.out: $(objpfx)unload3mod1.so $(objpfx)unload3mod2.so \
+ $(objpfx)unload3mod3.so $(objpfx)unload3mod4.so
+
ifdef libdl
$(objpfx)tst-tls9-static: $(common-objpfx)dlfcn/libdl.a
$(objpfx)tst-tls9-static.out: $(objpfx)tst-tlsmod5.so $(objpfx)tst-tlsmod6.so
--- libc/elf/unload3.c.jj 2005-03-03 08:10:45.809060064 +0100
+++ libc/elf/unload3.c 2005-03-03 08:10:45.809060064 +0100
@@ -0,0 +1,41 @@
+#include <dlfcn.h>
+#include <stdio.h>
+
+int
+main (void)
+{
+ void *g = dlopen ("unload3mod1.so", RTLD_GLOBAL | RTLD_NOW);
+ void *h = dlopen ("unload3mod2.so", RTLD_GLOBAL | RTLD_NOW);
+ if (g == NULL || h == NULL)
+ {
+ printf ("dlopen unload3mod{1,2}.so failed: %p %p\n", g, h);
+ return 1;
+ }
+ dlclose (h);
+ dlclose (g);
+
+ g = dlopen ("unload3mod3.so", RTLD_GLOBAL | RTLD_NOW);
+ h = dlopen ("unload3mod4.so", RTLD_GLOBAL | RTLD_NOW);
+ if (g == NULL || h == NULL)
+ {
+ printf ("dlopen unload3mod{3,4}.so failed: %p %p\n", g, h);
+ return 1;
+ }
+
+ int (*fn) (int);
+ fn = dlsym (h, "bar");
+ if (fn == NULL)
+ {
+ puts ("dlsym failed");
+ return 1;
+ }
+
+ int val = fn (16);
+ if (val != 24)
+ {
+ printf ("bar returned %d != 24\n", val);
+ return 1;
+ }
+
+ return 0;
+}
--- libc/elf/unload3mod1.c.jj 2005-03-03 08:10:45.809060064 +0100
+++ libc/elf/unload3mod1.c 2005-03-03 08:10:45.809060064 +0100
@@ -0,0 +1 @@
+int dummy1;
--- libc/elf/unload3mod2.c.jj 2005-03-03 08:10:45.809060064 +0100
+++ libc/elf/unload3mod2.c 2005-03-03 08:10:45.809060064 +0100
@@ -0,0 +1 @@
+int dummy2;
--- libc/elf/unload3mod3.c.jj 2005-03-03 08:10:45.809060064 +0100
+++ libc/elf/unload3mod3.c 2005-03-03 08:10:45.809060064 +0100
@@ -0,0 +1,8 @@
+#include <stdio.h>
+
+int
+foo (int x)
+{
+ puts ("foo");
+ return x * 2;
+}
--- libc/elf/unload3mod4.c.jj 2005-03-03 08:10:45.809060064 +0100
+++ libc/elf/unload3mod4.c 2005-03-03 08:12:40.932588653 +0100
@@ -0,0 +1,11 @@
+#include <stdio.h>
+
+int
+bar (int x)
+{
+ puts ("bar");
+ fflush (stdout);
+ x = foo (x - 4);
+ puts ("bar after foo");
+ return x;
+}
Jakub
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