notmuch/test/T360-symbol-hiding.sh
David Bremner 82faa059b8 test/T360-symbol-hiding: use readelf in place of nm
It turns out that using nm -P isn't as portable as hoped. In
particular with some ELF ABIs (e.g. ppc64 ELFv1), the desired symbols
end up in the data section instead of text.

The test is currently only functional on ELF based architectures, so I
think it's legit to depend on readelf instead of nm.

The switch to readelf has the advantage that we can explicitely ask
for all of the symbols with global visibility, rather than grepping
for notmuch. That seems a more robust approach since it will catch any
strangely named global symbols.
2020-12-13 08:23:42 -04:00

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#!/usr/bin/env bash
#
# Copyright (c) 2011 David Bremner
#
# This test tests whether hiding Xapian::Error symbols in libnotmuch
# also hides them for other users of libxapian. This is motivated by
# the discussion in https://gcc.gnu.org/wiki/Visibility'
test_description='exception symbol hiding'
. $(dirname "$0")/test-lib.sh || exit 1
test_begin_subtest 'running test' run_test
mkdir -p ${PWD}/fakedb/.notmuch
$TEST_DIRECTORY/symbol-test ${PWD}/fakedb ${PWD}/nonexistent 2>&1 \
| notmuch_dir_sanitize | sed -e "s,\`,\',g" -e "s,No [^[:space:]]* database,No XXXXXX database,g" > OUTPUT
cat <<EOF > EXPECTED
A Xapian exception occurred opening database: Couldn't stat 'CWD/fakedb/.notmuch/xapian'
caught No XXXXXX database found at path 'CWD/nonexistent'
EOF
test_expect_equal_file EXPECTED OUTPUT
test_begin_subtest 'checking output'
test_expect_equal "$result" "$output"
test_begin_subtest 'comparing existing to exported symbols'
readelf -Ws $NOTMUCH_BUILDDIR/lib/libnotmuch.so | \
awk '$4 == "FUNC" && $5 == "GLOBAL" && $7 != "UND" {print $8}' | sort -u > ACTUAL
sed -n 's/^\(notmuch_[a-zA-Z0-9_]*\)[[:blank:]]*(.*/\1/p' $NOTMUCH_SRCDIR/lib/notmuch.h | sort -u > EXPORTED
test_expect_equal_file EXPORTED ACTUAL
test_done