* [PATCH] Add and use link-test-modules-rpath-link [BZ #28455]
@ 2021-10-15 20:07 H.J. Lu via Libc-alpha
2021-11-29 12:50 ` PING^1 " H.J. Lu via Libc-alpha
2021-11-29 16:08 ` Carlos O'Donell via Libc-alpha
0 siblings, 2 replies; 4+ messages in thread
From: H.J. Lu via Libc-alpha @ 2021-10-15 20:07 UTC (permalink / raw)
To: libc-alpha
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 $(link-test-modules-rpath-link) in build-module-helper so that
test modules can dlopen modules with DT_RUNPATH.
3. Add a test to show why link-test-modules-rpath-link is needed.
This partially fixes BZ #28455.
---
Makeconfig | 2 ++
Makerules | 1 +
elf/Makefile | 8 +++++++-
elf/tst-global2.c | 28 ++++++++++++++++++++++++++++
elf/tst-globalmod2.c | 37 +++++++++++++++++++++++++++++++++++++
5 files changed, 75 insertions(+), 1 deletion(-)
create mode 100644 elf/tst-global2.c
create mode 100644 elf/tst-globalmod2.c
diff --git a/Makeconfig b/Makeconfig
index 2fa0884b4e..302fbf7e6b 100644
--- a/Makeconfig
+++ b/Makeconfig
@@ -569,8 +569,10 @@ link-libc-rpath-link = -Wl,-rpath-link=$(rpath-link)
# build-hardcoded-path-in-tests.
ifeq (yes,$(build-hardcoded-path-in-tests))
link-libc-tests-rpath-link = $(link-libc-rpath)
+link-test-modules-rpath-link = $(link-libc-rpath)
else
link-libc-tests-rpath-link = $(link-libc-rpath-link)
+link-test-modules-rpath-link =
endif # build-hardcoded-path-in-tests
link-libc-between-gnulib = $(common-objpfx)libc.so$(libc.so-version) \
diff --git a/Makerules b/Makerules
index 596fa68376..ac15671a0a 100644
--- a/Makerules
+++ b/Makerules
@@ -600,6 +600,7 @@ $(LINK.o) -shared -static-libgcc $(sysdep-LDFLAGS) $(rtld-LDFLAGS) \
$(if $($(@F)-no-z-defs)$(no-z-defs),,-Wl,-z,defs) \
-B$(csu-objpfx) $(load-map-file) \
$(LDFLAGS.so) $(LDFLAGS-$(@F:%.so=%).so) \
+ $(link-test-modules-rpath-link) \
-L$(subst :, -L,$(rpath-link)) -Wl,-rpath-link=$(rpath-link)
endef
diff --git a/elf/Makefile b/elf/Makefile
index b01ace2d5a..eeef71b82a 100644
--- a/elf/Makefile
+++ b/elf/Makefile
@@ -224,7 +224,7 @@ tests += restest1 preloadtest loadfail multiload origtest resolvfail \
tst-tls-ie tst-tls-ie-dlmopen argv0test \
tst-glibc-hwcaps tst-glibc-hwcaps-prepend tst-glibc-hwcaps-mask \
tst-tls20 tst-tls21 tst-dlmopen-dlerror tst-dlmopen-gethostbyname \
- tst-dl-is_dso tst-ro-dynamic
+ tst-dl-is_dso tst-ro-dynamic tst-global2
# reldep9
tests-internal += loadtest unload unload2 circleload1 \
neededtest neededtest2 neededtest3 neededtest4 \
@@ -365,6 +365,7 @@ modules-names = testobj1 testobj2 testobj3 testobj4 testobj5 testobj6 \
tst-tls20mod-bad tst-tls21mod tst-dlmopen-dlerror-mod \
tst-auxvalmod \
tst-dlmopen-gethostbyname-mod tst-ro-dynamic-mod \
+ tst-globalmod2 \
# Most modules build with _ISOMAC defined, but those filtered out
# depend on internal headers.
@@ -1269,6 +1270,11 @@ tst-audit8-ENV = LD_AUDIT=$(objpfx)tst-auditmod1.so
$(objpfx)tst-global1.out: $(objpfx)testobj6.so $(objpfx)testobj2.so
+$(objpfx)tst-global2: $(objpfx)tst-globalmod2.so
+$(objpfx)tst-global2.out: $(objpfx)reldepmod1.so $(objpfx)reldepmod4.so
+LDFLAGS-tst-global2 = -Wl,--enable-new-dtags
+LDFLAGS-tst-globalmod2.so = -Wl,--enable-new-dtags
+
$(objpfx)order2.out: $(objpfx)order2mod1.so $(objpfx)order2mod2.so
$(objpfx)order2-cmp.out: $(objpfx)order2.out
(echo "12345" | cmp $< -) > $@; \
diff --git a/elf/tst-global2.c b/elf/tst-global2.c
new file mode 100644
index 0000000000..b17b69c42b
--- /dev/null
+++ b/elf/tst-global2.c
@@ -0,0 +1,28 @@
+/* Test dlopening a shared library in a shared library built with
+ -Wl,--enable-new-dtags in glibc with --enable-hardcoded-path-in-tests.
+ Copyright (C) 2021 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+extern int test (void);
+
+static int
+do_test (void)
+{
+ return test ();
+}
+
+#include <support/test-driver.c>
diff --git a/elf/tst-globalmod2.c b/elf/tst-globalmod2.c
new file mode 100644
index 0000000000..1d0cf3047e
--- /dev/null
+++ b/elf/tst-globalmod2.c
@@ -0,0 +1,37 @@
+/* Test dlopening a shared library in a shared library built with
+ -Wl,--enable-new-dtags in glibc with --enable-hardcoded-path-in-tests.
+ Copyright (C) 2021 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <dlfcn.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+extern int test (void);
+
+int
+test (void)
+{
+ (void) dlopen ("reldepmod4.so", RTLD_LAZY | RTLD_GLOBAL);
+ if (dlsym (RTLD_DEFAULT, "call_me") != NULL)
+ {
+ puts ("found \"call_me\"");
+ return EXIT_SUCCESS;
+ }
+ puts ("didn't find \"call_me\"");
+ return EXIT_FAILURE;
+}
--
2.31.1
^ permalink raw reply related [flat|nested] 4+ messages in thread
* PING^1 [PATCH] Add and use link-test-modules-rpath-link [BZ #28455]
2021-10-15 20:07 [PATCH] Add and use link-test-modules-rpath-link [BZ #28455] H.J. Lu via Libc-alpha
@ 2021-11-29 12:50 ` H.J. Lu via Libc-alpha
2021-11-29 16:08 ` Carlos O'Donell via Libc-alpha
1 sibling, 0 replies; 4+ messages in thread
From: H.J. Lu via Libc-alpha @ 2021-11-29 12:50 UTC (permalink / raw)
To: GNU C Library
On Fri, Oct 15, 2021 at 1:07 PM H.J. Lu <hjl.tools@gmail.com> wrote:
>
> 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 $(link-test-modules-rpath-link) in build-module-helper so that
> test modules can dlopen modules with DT_RUNPATH.
> 3. Add a test to show why link-test-modules-rpath-link is needed.
>
> This partially fixes BZ #28455.
> ---
> Makeconfig | 2 ++
> Makerules | 1 +
> elf/Makefile | 8 +++++++-
> elf/tst-global2.c | 28 ++++++++++++++++++++++++++++
> elf/tst-globalmod2.c | 37 +++++++++++++++++++++++++++++++++++++
> 5 files changed, 75 insertions(+), 1 deletion(-)
> create mode 100644 elf/tst-global2.c
> create mode 100644 elf/tst-globalmod2.c
>
> diff --git a/Makeconfig b/Makeconfig
> index 2fa0884b4e..302fbf7e6b 100644
> --- a/Makeconfig
> +++ b/Makeconfig
> @@ -569,8 +569,10 @@ link-libc-rpath-link = -Wl,-rpath-link=$(rpath-link)
> # build-hardcoded-path-in-tests.
> ifeq (yes,$(build-hardcoded-path-in-tests))
> link-libc-tests-rpath-link = $(link-libc-rpath)
> +link-test-modules-rpath-link = $(link-libc-rpath)
> else
> link-libc-tests-rpath-link = $(link-libc-rpath-link)
> +link-test-modules-rpath-link =
> endif # build-hardcoded-path-in-tests
>
> link-libc-between-gnulib = $(common-objpfx)libc.so$(libc.so-version) \
> diff --git a/Makerules b/Makerules
> index 596fa68376..ac15671a0a 100644
> --- a/Makerules
> +++ b/Makerules
> @@ -600,6 +600,7 @@ $(LINK.o) -shared -static-libgcc $(sysdep-LDFLAGS) $(rtld-LDFLAGS) \
> $(if $($(@F)-no-z-defs)$(no-z-defs),,-Wl,-z,defs) \
> -B$(csu-objpfx) $(load-map-file) \
> $(LDFLAGS.so) $(LDFLAGS-$(@F:%.so=%).so) \
> + $(link-test-modules-rpath-link) \
> -L$(subst :, -L,$(rpath-link)) -Wl,-rpath-link=$(rpath-link)
> endef
>
> diff --git a/elf/Makefile b/elf/Makefile
> index b01ace2d5a..eeef71b82a 100644
> --- a/elf/Makefile
> +++ b/elf/Makefile
> @@ -224,7 +224,7 @@ tests += restest1 preloadtest loadfail multiload origtest resolvfail \
> tst-tls-ie tst-tls-ie-dlmopen argv0test \
> tst-glibc-hwcaps tst-glibc-hwcaps-prepend tst-glibc-hwcaps-mask \
> tst-tls20 tst-tls21 tst-dlmopen-dlerror tst-dlmopen-gethostbyname \
> - tst-dl-is_dso tst-ro-dynamic
> + tst-dl-is_dso tst-ro-dynamic tst-global2
> # reldep9
> tests-internal += loadtest unload unload2 circleload1 \
> neededtest neededtest2 neededtest3 neededtest4 \
> @@ -365,6 +365,7 @@ modules-names = testobj1 testobj2 testobj3 testobj4 testobj5 testobj6 \
> tst-tls20mod-bad tst-tls21mod tst-dlmopen-dlerror-mod \
> tst-auxvalmod \
> tst-dlmopen-gethostbyname-mod tst-ro-dynamic-mod \
> + tst-globalmod2 \
>
> # Most modules build with _ISOMAC defined, but those filtered out
> # depend on internal headers.
> @@ -1269,6 +1270,11 @@ tst-audit8-ENV = LD_AUDIT=$(objpfx)tst-auditmod1.so
>
> $(objpfx)tst-global1.out: $(objpfx)testobj6.so $(objpfx)testobj2.so
>
> +$(objpfx)tst-global2: $(objpfx)tst-globalmod2.so
> +$(objpfx)tst-global2.out: $(objpfx)reldepmod1.so $(objpfx)reldepmod4.so
> +LDFLAGS-tst-global2 = -Wl,--enable-new-dtags
> +LDFLAGS-tst-globalmod2.so = -Wl,--enable-new-dtags
> +
> $(objpfx)order2.out: $(objpfx)order2mod1.so $(objpfx)order2mod2.so
> $(objpfx)order2-cmp.out: $(objpfx)order2.out
> (echo "12345" | cmp $< -) > $@; \
> diff --git a/elf/tst-global2.c b/elf/tst-global2.c
> new file mode 100644
> index 0000000000..b17b69c42b
> --- /dev/null
> +++ b/elf/tst-global2.c
> @@ -0,0 +1,28 @@
> +/* Test dlopening a shared library in a shared library built with
> + -Wl,--enable-new-dtags in glibc with --enable-hardcoded-path-in-tests.
> + Copyright (C) 2021 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public
> + License as published by the Free Software Foundation; either
> + version 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with the GNU C Library; if not, see
> + <https://www.gnu.org/licenses/>. */
> +
> +extern int test (void);
> +
> +static int
> +do_test (void)
> +{
> + return test ();
> +}
> +
> +#include <support/test-driver.c>
> diff --git a/elf/tst-globalmod2.c b/elf/tst-globalmod2.c
> new file mode 100644
> index 0000000000..1d0cf3047e
> --- /dev/null
> +++ b/elf/tst-globalmod2.c
> @@ -0,0 +1,37 @@
> +/* Test dlopening a shared library in a shared library built with
> + -Wl,--enable-new-dtags in glibc with --enable-hardcoded-path-in-tests.
> + Copyright (C) 2021 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public
> + License as published by the Free Software Foundation; either
> + version 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with the GNU C Library; if not, see
> + <https://www.gnu.org/licenses/>. */
> +
> +#include <dlfcn.h>
> +#include <stdio.h>
> +#include <stdlib.h>
> +
> +extern int test (void);
> +
> +int
> +test (void)
> +{
> + (void) dlopen ("reldepmod4.so", RTLD_LAZY | RTLD_GLOBAL);
> + if (dlsym (RTLD_DEFAULT, "call_me") != NULL)
> + {
> + puts ("found \"call_me\"");
> + return EXIT_SUCCESS;
> + }
> + puts ("didn't find \"call_me\"");
> + return EXIT_FAILURE;
> +}
> --
> 2.31.1
>
PING.
--
H.J.
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] Add and use link-test-modules-rpath-link [BZ #28455]
2021-10-15 20:07 [PATCH] Add and use link-test-modules-rpath-link [BZ #28455] H.J. Lu via Libc-alpha
2021-11-29 12:50 ` PING^1 " H.J. Lu via Libc-alpha
@ 2021-11-29 16:08 ` Carlos O'Donell via Libc-alpha
1 sibling, 0 replies; 4+ messages in thread
From: Carlos O'Donell via Libc-alpha @ 2021-11-29 16:08 UTC (permalink / raw)
To: H.J. Lu, libc-alpha
On 10/15/21 16:07, H.J. Lu via Libc-alpha wrote:
> 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.
Please post v2.
Requested minor changes in tests. Please talk about DT_RUNPATH in test comments.
Passes without regression on x86_64 and i686.
Passes CI/CD.
The DSOs used in tests themselves must also set DT_RUNPATH to find their dependencies
in the build directory.
When we have $(build-hardocded-path-in-tests) this must come from $(link-libc-rpath)
which has all the right paths.
> This partially fixes BZ #28455.
> ---
> Makeconfig | 2 ++
> Makerules | 1 +
> elf/Makefile | 8 +++++++-
> elf/tst-global2.c | 28 ++++++++++++++++++++++++++++
> elf/tst-globalmod2.c | 37 +++++++++++++++++++++++++++++++++++++
> 5 files changed, 75 insertions(+), 1 deletion(-)
> create mode 100644 elf/tst-global2.c
> create mode 100644 elf/tst-globalmod2.c
>
> diff --git a/Makeconfig b/Makeconfig
> index 2fa0884b4e..302fbf7e6b 100644
> --- a/Makeconfig
> +++ b/Makeconfig
> @@ -569,8 +569,10 @@ link-libc-rpath-link = -Wl,-rpath-link=$(rpath-link)
> # build-hardcoded-path-in-tests.
> ifeq (yes,$(build-hardcoded-path-in-tests))
> link-libc-tests-rpath-link = $(link-libc-rpath)
> +link-test-modules-rpath-link = $(link-libc-rpath)
OK.
> else
> link-libc-tests-rpath-link = $(link-libc-rpath-link)
> +link-test-modules-rpath-link =
OK.
> endif # build-hardcoded-path-in-tests
>
> link-libc-between-gnulib = $(common-objpfx)libc.so$(libc.so-version) \
> diff --git a/Makerules b/Makerules
> index 596fa68376..ac15671a0a 100644
> --- a/Makerules
> +++ b/Makerules
> @@ -600,6 +600,7 @@ $(LINK.o) -shared -static-libgcc $(sysdep-LDFLAGS) $(rtld-LDFLAGS) \
> $(if $($(@F)-no-z-defs)$(no-z-defs),,-Wl,-z,defs) \
> -B$(csu-objpfx) $(load-map-file) \
> $(LDFLAGS.so) $(LDFLAGS-$(@F:%.so=%).so) \
> + $(link-test-modules-rpath-link) \
OK. Add to build-module-helper.
> -L$(subst :, -L,$(rpath-link)) -Wl,-rpath-link=$(rpath-link)
> endef
>
> diff --git a/elf/Makefile b/elf/Makefile
> index b01ace2d5a..eeef71b82a 100644
> --- a/elf/Makefile
> +++ b/elf/Makefile
> @@ -224,7 +224,7 @@ tests += restest1 preloadtest loadfail multiload origtest resolvfail \
> tst-tls-ie tst-tls-ie-dlmopen argv0test \
> tst-glibc-hwcaps tst-glibc-hwcaps-prepend tst-glibc-hwcaps-mask \
> tst-tls20 tst-tls21 tst-dlmopen-dlerror tst-dlmopen-gethostbyname \
> - tst-dl-is_dso tst-ro-dynamic
> + tst-dl-is_dso tst-ro-dynamic tst-global2
OK. New tst-global2 which loads a DSO that has to find ANOTHER DSO in the rpath.
> # reldep9
> tests-internal += loadtest unload unload2 circleload1 \
> neededtest neededtest2 neededtest3 neededtest4 \
> @@ -365,6 +365,7 @@ modules-names = testobj1 testobj2 testobj3 testobj4 testobj5 testobj6 \
> tst-tls20mod-bad tst-tls21mod tst-dlmopen-dlerror-mod \
> tst-auxvalmod \
> tst-dlmopen-gethostbyname-mod tst-ro-dynamic-mod \
> + tst-globalmod2 \
OK.
>
> # Most modules build with _ISOMAC defined, but those filtered out
> # depend on internal headers.
> @@ -1269,6 +1270,11 @@ tst-audit8-ENV = LD_AUDIT=$(objpfx)tst-auditmod1.so
>
> $(objpfx)tst-global1.out: $(objpfx)testobj6.so $(objpfx)testobj2.so
>
> +$(objpfx)tst-global2: $(objpfx)tst-globalmod2.so
> +$(objpfx)tst-global2.out: $(objpfx)reldepmod1.so $(objpfx)reldepmod4.so
> +LDFLAGS-tst-global2 = -Wl,--enable-new-dtags
> +LDFLAGS-tst-globalmod2.so = -Wl,--enable-new-dtags
OK. Force new dtags.
> +
> $(objpfx)order2.out: $(objpfx)order2mod1.so $(objpfx)order2mod2.so
> $(objpfx)order2-cmp.out: $(objpfx)order2.out
> (echo "12345" | cmp $< -) > $@; \
> diff --git a/elf/tst-global2.c b/elf/tst-global2.c
> new file mode 100644
> index 0000000000..b17b69c42b
> --- /dev/null
> +++ b/elf/tst-global2.c
> @@ -0,0 +1,28 @@
> +/* Test dlopening a shared library in a shared library built with
> + -Wl,--enable-new-dtags in glibc with --enable-hardcoded-path-in-tests.
One line. Should reference bug 284555.
> + Copyright (C) 2021 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public
> + License as published by the Free Software Foundation; either
> + version 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with the GNU C Library; if not, see
> + <https://www.gnu.org/licenses/>. */
> +
Please add extended comments here.
> +extern int test (void);
> +
> +static int
> +do_test (void)
> +{
> + return test ();
> +}
> +
> +#include <support/test-driver.c>
> diff --git a/elf/tst-globalmod2.c b/elf/tst-globalmod2.c
> new file mode 100644
> index 0000000000..1d0cf3047e
> --- /dev/null
> +++ b/elf/tst-globalmod2.c
> @@ -0,0 +1,37 @@
> +/* Test dlopening a shared library in a shared library built with
> + -Wl,--enable-new-dtags in glibc with --enable-hardcoded-path-in-tests.
One line. Should reference bug number.
> + Copyright (C) 2021 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> + The GNU C Library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public
> + License as published by the Free Software Foundation; either
> + version 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C Library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with the GNU C Library; if not, see
> + <https://www.gnu.org/licenses/>. */
> +
Please add extended comments here.
> +#include <dlfcn.h>
> +#include <stdio.h>
> +#include <stdlib.h>
> +
> +extern int test (void);
> +
> +int
> +test (void)
> +{
> + (void) dlopen ("reldepmod4.so", RTLD_LAZY | RTLD_GLOBAL);
> + if (dlsym (RTLD_DEFAULT, "call_me") != NULL)
> + {
> + puts ("found \"call_me\"");
> + return EXIT_SUCCESS;
> + }
> + puts ("didn't find \"call_me\"");
> + return EXIT_FAILURE;
> +}
>
--
Cheers,
Carlos.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [PATCH] Add and use link-test-modules-rpath-link [BZ #28455]
@ 2022-01-04 14:00 H.J. Lu via Libc-alpha
0 siblings, 0 replies; 4+ messages in thread
From: H.J. Lu via Libc-alpha @ 2022-01-04 14:00 UTC (permalink / raw)
To: libc-alpha
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 $(link-test-modules-rpath-link) in build-module-helper so that
test modules can dlopen modules with DT_RUNPATH.
3. Add a test to show why link-test-modules-rpath-link is needed.
This partially fixes BZ #28455.
---
Makeconfig | 2 ++
Makerules | 1 +
elf/Makefile | 7 +++++++
elf/tst-global2.c | 32 ++++++++++++++++++++++++++++++++
elf/tst-globalmod2.c | 41 +++++++++++++++++++++++++++++++++++++++++
5 files changed, 83 insertions(+)
create mode 100644 elf/tst-global2.c
create mode 100644 elf/tst-globalmod2.c
diff --git a/Makeconfig b/Makeconfig
index 06f1cca320..02a0afb9c2 100644
--- a/Makeconfig
+++ b/Makeconfig
@@ -575,8 +575,10 @@ link-libc-rpath-link = -Wl,-rpath-link=$(rpath-link)
# build-hardcoded-path-in-tests.
ifeq (yes,$(build-hardcoded-path-in-tests))
link-libc-tests-rpath-link = $(link-libc-rpath)
+link-test-modules-rpath-link = $(link-libc-rpath)
else
link-libc-tests-rpath-link = $(link-libc-rpath-link)
+link-test-modules-rpath-link =
endif # build-hardcoded-path-in-tests
link-libc-between-gnulib = $(common-objpfx)libc.so$(libc.so-version) \
diff --git a/Makerules b/Makerules
index 9a56cbdead..37c29758ee 100644
--- a/Makerules
+++ b/Makerules
@@ -591,6 +591,7 @@ $(LINK.o) -shared -static-libgcc $(sysdep-LDFLAGS) $(rtld-LDFLAGS) \
$(if $($(@F)-no-z-defs)$(no-z-defs),,-Wl,-z,defs) \
-B$(csu-objpfx) $(load-map-file) \
$(LDFLAGS.so) $(LDFLAGS-$(@F:%.so=%).so) \
+ $(link-test-modules-rpath-link) \
-L$(subst :, -L,$(rpath-link)) -Wl,-rpath-link=$(rpath-link)
endef
diff --git a/elf/Makefile b/elf/Makefile
index 8eb7e6e5d9..bbca0b21bc 100644
--- a/elf/Makefile
+++ b/elf/Makefile
@@ -279,6 +279,7 @@ tests += \
tst-glibc-hwcaps-mask \
tst-glibc-hwcaps-prepend \
tst-global1 \
+ tst-global2 \
tst-initfinilazyfail \
tst-initorder \
tst-initorder2 \
@@ -535,6 +536,7 @@ modules-names = \
tst-filterobj-filtee \
tst-filterobj-flt \
tst-finilazyfailmod \
+ tst-globalmod2 \
tst-initlazyfailmod \
tst-initorder2a \
tst-initorder2b \
@@ -1624,6 +1626,11 @@ tst-audit8-ENV = LD_AUDIT=$(objpfx)tst-auditmod1.so
$(objpfx)tst-global1.out: $(objpfx)testobj6.so $(objpfx)testobj2.so
+$(objpfx)tst-global2: $(objpfx)tst-globalmod2.so
+$(objpfx)tst-global2.out: $(objpfx)reldepmod1.so $(objpfx)reldepmod4.so
+LDFLAGS-tst-global2 = -Wl,--enable-new-dtags
+LDFLAGS-tst-globalmod2.so = -Wl,--enable-new-dtags
+
$(objpfx)order2.out: $(objpfx)order2mod1.so $(objpfx)order2mod2.so
$(objpfx)order2-cmp.out: $(objpfx)order2.out
(echo "12345" | cmp $< -) > $@; \
diff --git a/elf/tst-global2.c b/elf/tst-global2.c
new file mode 100644
index 0000000000..e929f526f4
--- /dev/null
+++ b/elf/tst-global2.c
@@ -0,0 +1,32 @@
+/* Test BZ #28455.
+ Copyright (C) 2021 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+/* In glibc configured with --enable-hardcoded-path-in-tests, a test
+ program built with -Wl,--enable-new-dtags, which adds DT_RUNPATH,
+ instead of DT_RPATH, can call a function in a shared library, which
+ dlopens another shared library. */
+
+extern int test (void);
+
+static int
+do_test (void)
+{
+ return test ();
+}
+
+#include <support/test-driver.c>
diff --git a/elf/tst-globalmod2.c b/elf/tst-globalmod2.c
new file mode 100644
index 0000000000..6fd70a72a8
--- /dev/null
+++ b/elf/tst-globalmod2.c
@@ -0,0 +1,41 @@
+/* Test BZ #28455.
+ Copyright (C) 2021 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+/* In glibc configured with --enable-hardcoded-path-in-tests, a test
+ program built with -Wl,--enable-new-dtags, which adds DT_RUNPATH,
+ instead of DT_RPATH, can call a function in a shared library, which
+ dlopens another shared library. */
+
+#include <dlfcn.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+extern int test (void);
+
+int
+test (void)
+{
+ (void) dlopen ("reldepmod4.so", RTLD_LAZY | RTLD_GLOBAL);
+ if (dlsym (RTLD_DEFAULT, "call_me") != NULL)
+ {
+ puts ("found \"call_me\"");
+ return EXIT_SUCCESS;
+ }
+ puts ("didn't find \"call_me\"");
+ return EXIT_FAILURE;
+}
--
2.33.1
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2021-10-15 20:07 [PATCH] Add and use link-test-modules-rpath-link [BZ #28455] H.J. Lu via Libc-alpha
2021-11-29 12:50 ` PING^1 " H.J. Lu via Libc-alpha
2021-11-29 16:08 ` Carlos O'Donell via Libc-alpha
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