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Add and use link-test-modules-rpath-link [BZ #28455]
DT_RUNPATH is only used to find the immediate dependencies of the executable or shared object containing the DT_RUNPATH entry: 1. Define link-test-modules-rpath-link if $(build-hardcoded-path-in-tests) is yes. 2. Use $(link-test-modules-rpath-link) in build-module-helper so that test modules can dlopen modules with DT_RUNPATH. 3. Add a test to show why link-test-modules-rpath-link is needed. This partially fixes BZ #28455.
This commit is contained in:
H.J. Lu
parent
976db046bc
commit
114d07fd9a
@ -575,8 +575,10 @@ link-libc-rpath-link = -Wl,-rpath-link=$(rpath-link)
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# build-hardcoded-path-in-tests.
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ifeq (yes,$(build-hardcoded-path-in-tests))
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link-libc-tests-rpath-link = $(link-libc-rpath)
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link-test-modules-rpath-link = $(link-libc-rpath)
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else
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link-libc-tests-rpath-link = $(link-libc-rpath-link)
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link-test-modules-rpath-link =
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endif # build-hardcoded-path-in-tests
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link-libc-between-gnulib = $(common-objpfx)libc.so$(libc.so-version) \
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@ -597,6 +597,7 @@ $(LINK.o) -shared -static-libgcc $(sysdep-LDFLAGS) $(rtld-LDFLAGS) \
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$(if $($(@F)-no-z-defs)$(no-z-defs),,-Wl,-z,defs) \
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-B$(csu-objpfx) $(load-map-file) \
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$(LDFLAGS.so) $(LDFLAGS-$(@F:%.so=%).so) \
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$(link-test-modules-rpath-link) \
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-L$(subst :, -L,$(rpath-link)) -Wl,-rpath-link=$(rpath-link)
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endef
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@ -402,6 +402,7 @@ tests += \
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tst-glibc-hwcaps-mask \
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tst-glibc-hwcaps-prepend \
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tst-global1 \
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tst-global2 \
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tst-initfinilazyfail \
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tst-initorder \
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tst-initorder2 \
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@ -716,6 +717,7 @@ modules-names = \
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tst-filterobj-filtee \
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tst-filterobj-flt \
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tst-finilazyfailmod \
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tst-globalmod2 \
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tst-initlazyfailmod \
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tst-initorder2a \
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tst-initorder2b \
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@ -1863,6 +1865,11 @@ tst-audit8-ENV = LD_AUDIT=$(objpfx)tst-auditmod1.so
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$(objpfx)tst-global1.out: $(objpfx)testobj6.so $(objpfx)testobj2.so
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$(objpfx)tst-global2: $(objpfx)tst-globalmod2.so
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$(objpfx)tst-global2.out: $(objpfx)reldepmod1.so $(objpfx)reldepmod4.so
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LDFLAGS-tst-global2 = -Wl,--enable-new-dtags
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LDFLAGS-tst-globalmod2.so = -Wl,--enable-new-dtags
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$(objpfx)order2.out: $(objpfx)order2mod1.so $(objpfx)order2mod2.so
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$(objpfx)order2-cmp.out: $(objpfx)order2.out
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(echo "12345" | cmp $< -) > $@; \
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32
elf/tst-global2.c
Normal file
32
elf/tst-global2.c
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@ -0,0 +1,32 @@
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/* Test BZ #28455.
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Copyright (C) 2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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/* In glibc configured with --enable-hardcoded-path-in-tests, a test
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program built with -Wl,--enable-new-dtags, which adds DT_RUNPATH,
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instead of DT_RPATH, can call a function in a shared library, which
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dlopens another shared library. */
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extern int test (void);
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static int
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do_test (void)
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{
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return test ();
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}
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#include <support/test-driver.c>
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41
elf/tst-globalmod2.c
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41
elf/tst-globalmod2.c
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@ -0,0 +1,41 @@
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/* Test BZ #28455.
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Copyright (C) 2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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/* In glibc configured with --enable-hardcoded-path-in-tests, a test
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program built with -Wl,--enable-new-dtags, which adds DT_RUNPATH,
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instead of DT_RPATH, can call a function in a shared library, which
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dlopens another shared library. */
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#include <dlfcn.h>
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#include <stdio.h>
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#include <stdlib.h>
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extern int test (void);
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int
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test (void)
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{
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(void) dlopen ("reldepmod4.so", RTLD_LAZY | RTLD_GLOBAL);
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if (dlsym (RTLD_DEFAULT, "call_me") != NULL)
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{
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puts ("found \"call_me\"");
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return EXIT_SUCCESS;
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}
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puts ("didn't find \"call_me\"");
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return EXIT_FAILURE;
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}
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