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elf: Add ld.so test with non-existing program name

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None of the existing tests seem to cover the case where
_dl_signal_error is called without an active error handler.
The new elf/tst-rtld-does-not-exist test triggers such a
_dl_signal_error call from _dl_map_object.

Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
This commit is contained in:
Florian Weimer 2024-04-08 19:19:09 +02:00
parent 1cce91d8ae
commit ae7468a7b0
2 changed files with 46 additions and 0 deletions
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7
elf/Makefile
View File

@ -621,6 +621,13 @@ $(objpfx)tst-valgrind-smoke.out: tst-valgrind-smoke.sh $(objpfx)ld.so $(objpfx)v
'$(run-program-env)' '$(rpath-link)' $(objpfx)valgrind-test \
'$(valgrind-suppressions-tst-valgrind-smoke)' > $@; $(evaluate-test)
ifeq ($(run-built-tests),yes)
tests-special += $(objpfx)tst-rtld-does-not-exist.out
endif
$(objpfx)tst-rtld-does-not-exist.out: tst-rtld-does-not-exist.sh $(objpfx)ld.so
$(SHELL) $< $(objpfx)ld.so > $@; \
$(evaluate-test)
tests += $(tests-execstack-$(have-z-execstack))
ifeq ($(run-built-tests),yes)
tests-special += \

39
elf/tst-rtld-does-not-exist.sh Normal file
View File

@ -0,0 +1,39 @@
#!/bin/sh
# Check that running ld.so with a non-existing file prints an error.
# 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/>.
export LC_ALL=C
rtld="$1"
tmp_out="$(mktemp)"
$rtld program-does-not-exist 2>"$tmp_out"
status=$?
echo "$rtld exit status: $status"
echo "output (with expected error):"
cat "$tmp_out"
if test $status -eq 127 \
&& grep -q "^program-does-not-exist: error while loading shared libraries: program-does-not-exist: cannot open shared object file$" "$tmp_out" \
&& test "$(wc -l < "$tmp_out")" -eq 1 ; then
status=0
else
status=1
fi
rm "$tmp_out"
exit $status