Add crt1-2.0.o for glibc 2.0 compatibility tests

Starting from glibc 2.1, crt1.o contains _IO_stdin_used which is checked
by _IO_check_libio to provide binary compatibility for glibc 2.0.  Add
crt1-2.0.o for tests against glibc 2.0.  Define tests-2.0 for glibc 2.0
compatibility tests.  Add and update glibc 2.0 compatibility tests for
stderr, matherr and pthread_kill.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
This commit is contained in:
H.J. Lu 2024-04-30 09:57:12 -07:00
parent 23f0d81608
commit 5f245f3bfb
7 changed files with 102 additions and 1 deletions

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@ -360,6 +360,8 @@ whole-archive = -Wl,--whole-archive
# Installed name of the startup code.
# The ELF convention is that the startfile is called crt1.o
start-installed-name = crt1.o
# Similar to crt1.o, but without _IO_stdin_used.
start-name-2.0 = crt1-2.0.o
# On systems that do not need a special startfile for statically linked
# binaries, simply set it to the normal name.
ifndef static-start-installed-name
@ -537,6 +539,25 @@ else # build-static
endif # build-shared
endif # +link
# Command for linking test programs with crt1.o from glibc 2.0.
+link-2.0-before-inputs = -nostdlib -nostartfiles $(no-pie-ldflag) \
$(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
$(relro-LDFLAGS) $(hashstyle-LDFLAGS) \
$(firstword $(CRT-$(@F)) $(csu-objpfx)$(start-name-2.0)) \
$(+preinit) $(+prector)
+link-2.0-before-libc = -o $@ $(+link-2.0-before-inputs) \
$(filter-out $(addprefix $(csu-objpfx),start.o \
$(start-name-2.0))\
$(+preinit) $(link-extra-libs) \
$(common-objpfx)libc% $(+postinit),$^) \
$(link-extra-libs)
+link-after-libc = $(+postctor) $(+postinit)
define +link-2.0-tests
$(CC) $(+link-2.0-before-libc) $(rtld-tests-LDFLAGS) $(link-libc-tests) \
$(+link-after-libc)
$(call after-link,$@)
endef
# The pretty printer test programs need to be compiled without optimizations
# so they won't confuse gdb. We could use either the 'GCC optimize' pragma
# or the 'optimize' function attribute to achieve this; however, at least on

13
Rules
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@ -188,6 +188,7 @@ binaries-all = $(binaries-all-notests) $(binaries-all-tests)
binaries-static-notests = $(others-static)
binaries-static-tests = $(tests-static) $(xtests-static)
binaries-static = $(binaries-static-notests) $(binaries-static-tests)
binaries-shared-2.0-tests = $(tests-2.0)
ifeq (yesyes,$(have-fpie)$(build-shared))
binaries-pie-tests = $(tests-pie) $(xtests-pie)
binaries-pie-notests = $(others-pie)
@ -215,7 +216,8 @@ binaries-malloc-hugetlb2-tests =
endif
binaries-pie = $(binaries-pie-tests) $(binaries-pie-notests)
binaries-shared-tests = $(filter-out $(binaries-pie) $(binaries-static), \
binaries-shared-tests = $(filter-out $(binaries-pie) $(binaries-static) \
$(binaries-shared-2.0-tests), \
$(binaries-all-tests))
binaries-shared-notests = $(filter-out $(binaries-pie) $(binaries-static), \
$(binaries-all-notests))
@ -235,6 +237,15 @@ $(addprefix $(objpfx),$(binaries-shared-tests)): %: %.o \
$(+link-tests)
endif
# Linking test programs with crt1.o from glibc 2.0.
ifneq "$(strip $(binaries-shared-2.0-tests))" ""
$(addprefix $(objpfx),$(binaries-shared-2.0-tests)): %: %.o \
$(link-extra-libs-tests) \
$(sort $(filter $(common-objpfx)lib%,$(link-libc))) \
$(addprefix $(csu-objpfx),start.o) $(+preinit) $(+postinit)
$(+link-2.0-tests)
endif
ifneq "$(strip $(binaries-mcheck-tests))" ""
$(addprefix $(objpfx),$(binaries-mcheck-tests)): %-mcheck: %.o \
$(link-extra-libs-tests) \

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@ -42,6 +42,7 @@ csu-dummies = $(filter-out $(start-installed-name),crt1.o Mcrt1.o)
extra-objs = \
$(csu-dummies) \
$(start-installed-name) \
$(start-name-2.0) \
S$(start-installed-name) \
g$(start-installed-name) \
start.o \
@ -182,6 +183,9 @@ ifndef start-installed-name-rule
$(objpfx)$(start-installed-name): $(objpfx)start.o $(objpfx)abi-note.o \
$(objpfx)init.o $(objpfx)static-reloc.o
$(link-relocatable)
$(objpfx)$(start-name-2.0): $(objpfx)start.o $(objpfx)abi-note.o \
$(objpfx)static-reloc.o
$(link-relocatable)
$(objpfx)r$(start-installed-name): $(objpfx)start.o $(objpfx)abi-note.o \
$(objpfx)init.o
$(link-relocatable)

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@ -266,6 +266,12 @@ aux := fileops genops stdfiles stdio strops
ifeq ($(build-shared),yes)
generated += tst-bz24228.mtrace tst-bz24228.check
aux += oldfileops oldstdfiles
tests += \
tst-stderr-compat \
# tests
tests-2.0 += \
tst-stderr-compat \
# tests-2.0
endif
shared-only-routines = oldiofopen oldiofdopen oldiofclose oldfileops \

52
libio/tst-stderr-compat.c Normal file
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@ -0,0 +1,52 @@
/* Test that fclose works on stderr from glibc 2.0.
Copyright (C) 2024 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 <shlib-compat.h>
#if TEST_COMPAT (libc, GLIBC_2_0, GLIBC_2_1)
# define _LIBC
# define _IO_USE_OLD_IO_FILE
# include <stdio.h>
# include <support/check.h>
extern FILE _IO_stderr_;
compat_symbol_reference (libc, _IO_stderr_, _IO_stderr_, GLIBC_2_0);
compat_symbol_reference (libc, fclose, fclose, GLIBC_2_0);
__attribute__ ((weak, noclone, noinline))
void
do_fclose (FILE *fp)
{
TEST_VERIFY_EXIT (fclose (fp) == 0);
}
static int
do_test (void)
{
do_fclose (&_IO_stderr_);
return 0;
}
#else
static int
do_test (void)
{
return 0;
}
#endif
#include <support/test-driver.c>

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@ -566,6 +566,9 @@ tests += \
test-matherr \
test-matherr-2 \
# tests
tests-2.0 += \
test-matherr-2 \
# tests-2.0
endif
# These tests use internal (unexported) GMP functions and are linked

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@ -282,6 +282,10 @@ tests += \
tst-vfork2x \
# tests
tests-2.0 += \
tst-pthread_kill-exited
# tests-2.0
tests-time64 += \
tst-abstime-time64 \
tst-cnd-timedwait-time64 \