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#!/bin/sh
#
# Ensure that strace -k works.
#
# Copyright (c) 2014 Masatake YAMATO <yamato@redhat.com>
# Copyright (c) 2014-2016 Dmitry V. Levin <ldv@altlinux.org>
# Copyright (c) 2014-2020 The strace developers.
# All rights reserved.
#
# SPDX-License-Identifier: GPL-2.0-or-later
. "${srcdir=.}/init.sh"
: "${ATTACH_MODE=0}"
# strace -k is implemented using /proc/$pid/maps
[ -f /proc/self/maps ] ||
framework_skip_ '/proc/self/maps is not available'
check_prog grep
check_prog readlink
check_prog sed
check_prog tr
path_to_sed="$(command -v sed)"
if [ -x "$path_to_sed" ] &&
path_to_sed="$(readlink -ev -- "$path_to_sed")"; then
"$path_to_sed" -n 's/^[^/]\+[[:space:]]\(\/.*\)$/\1/p' /proc/self/maps |
grep -F -x -e "$path_to_sed" > /dev/null || {
cat >&2 /proc/self/maps
framework_skip_ '/proc/self/maps is invalid'
}
fi
run_prog "${test_prog=../stack-fcall}"
if [ "x${ATTACH_MODE}" = "x1" ]; then
../set_ptracer_any "${test_prog}" >> "$EXP" &
tracee_pid=$!
while ! [ -s "$EXP" ]; do
kill -0 "$tracee_pid" 2> /dev/null ||
fail_ 'set_ptracer_any failed'
done
run_strace --trace=chdir --stack-trace --attach="$tracee_pid"
else
run_strace -e chdir -k $args
fi
expected="$srcdir/$NAME.expected"
awk '
/^[^ ]/ {
if (out != "")
print out
syscall = gensub(/^([[:alnum:]_]+)\(.*/, "\\1", 1)
signal = gensub(/^--- ([A-Z]+) .*/, "\\1", 1)
if (syscall != $0) {
out = syscall
stop = 0
} else if (signal != $0) {
out = signal
stop = 0
} else {
out = ""
}
}
/^ >[^(]+\(([^+]+)\+0x[a-f0-9]+\) / && !stop {
sym = gensub(/^ >[^(]+\(([^+]+)\+0x[a-f0-9]+\) .*$/, "\\1", 1)
out = out " " sym
if (sym == "main")
stop = 1
}' "$LOG" > "$OUT"
LC_ALL=C grep -E -x -f "$expected" < "$OUT" > /dev/null || {
cat >&2 <<__EOF__
Failed pattern of expected output:
$(cat "$expected")
Actual output:
$(cat "$OUT")
__EOF__
pattern=
case "$STRACE_ARCH" in
aarch64|i386|ppc*|s390*|sparc*|x32|x86*)
# These architectures are supported by elfutils libdw,
# see grep '\<HOOK\>.*\<abi_cfi\>' elfutils/backends
;;
arm) pattern='No DWARF information found'
# This is also supported by elfutils libdw
# but the latter needs debuginfo for unwinding.
;;
*) pattern='Unwinding not supported for this architecture'
;;
esac
if [ -n "$pattern" ] &&
LC_ALL=C grep -x " > $pattern" < "$LOG" > /dev/null; then
cat < "$LOG" >&2
skip_ "stack tracing is not fully supported on $STRACE_ARCH yet"
fi
dump_log_and_fail_with "$STRACE $args output mismatch"
}
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