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#!/bin/sh
#
# Copyright (c) 2011-2016 Dmitry V. Levin <ldv@strace.io>
# Copyright (c) 2011-2024 The strace developers.
# All rights reserved.
#
# SPDX-License-Identifier: GPL-2.0-or-later
export LC_ALL=C
ME_="${0##*/}"
LOG="log"
OUT="out"
EXP="exp"
CONFIG_H="../../src/config.h"
warn_() { printf >&2 '%s\n' "$*"; }
fail_() { warn_ "$ME_: failed test: $*"; exit 1; }
skip_() { warn_ "$ME_: skipped test: $*"; exit 77; }
framework_failure_() { warn_ "$ME_: framework failure: $*"; exit 99; }
framework_skip_() { warn_ "$ME_: framework skip: $*"; exit 77; }
# Enable using string in sed regular expressions by escaping all the special
# characters.
sed_re_escape()
{
printf "%s" "$*" | sed 's/[].*&^$[\/]/\\&/g'
}
# Enable using string in sed s// command by escaping slash occurrences.
sed_slash_escape()
{
printf "%s" "$*" | sed 's/[/]/\\&/g'
}
# Calculate an integer approximation of the square root of $1:
# returns 0 and prints the largest number the square of which is no greater
# than $1 if $1 is non-negative, returns 1 and prints nothing otherwise.
sq_root()
{
# Handling the negative cases
[ 0 -le "$1" ] || return 1;
# Handling the 0 and 1 cases
[ 1 -lt "$1" ] || { echo "$1"; return 0; }
local upper="$1"
local lower=1
local cur
while :; do
cur="$(( (lower + upper) / 2 ))"
[ "$((cur * cur))" -ne "$1" ] || { echo "$cur"; return 0; }
[ "$((cur * cur))" -lt "$1" ] || { upper="$cur"; continue; }
[ "$cur" -ne "$lower" ] || { echo "$cur"; return 0; }
lower="$cur"
done
}
# get_config_str OPTION
#
# Returns the value of OPTION from config.h (path to which set
# in the CONFIG_H variable).
get_config_str()
{
sed -E -n 's/#define[[:space:]]*'"$1"'[[:space:]]*"([^"]*)".*/\1/p' \
"$CONFIG_H"
}
# get_config_option OPTION YES_STRING [NO_STRING]
#
# Returns YES_STRING in case OPTION is enabled (present in config.h and has
# a non-zero numeric value). Otherwise, NO_STRING (or empty string, if not
# specified) is returned.
get_config_option()
{
local opt
opt=$(sed -E -n 's/#define[[:space:]]*'"$1"'[[:space:]]*([0-9]+)$/\1/p' \
"$CONFIG_H")
if [ -n "$opt" ] && [ "$opt" -ne 0 ]; then
printf "%s" "$2"
else
printf "%s" "${3-}"
fi
}
# Prints personality designator of the current personality:
# 64, 32, or x32.
print_current_personality_designator()
{
if [ "x$STRACE_NATIVE_ARCH" = "x$STRACE_ARCH" ]; then
if [ 'x32' = "$STRACE_NATIVE_ARCH" ]; then
echo x32
else
echo "$((SIZEOF_LONG * 8))"
fi
else
[ 4 -eq "$SIZEOF_LONG" ] ||
fail_ "sizeof(long) = $SIZEOF_LONG != 4"
if [ "x$SIZEOF_KERNEL_LONG_T" = "x$SIZEOF_LONG" ]; then
echo 32
else
[ 8 -eq "$SIZEOF_KERNEL_LONG_T" ] ||
fail_ "sizeof(kernel_long_t) = $SIZEOF_KERNEL_LONG_T != 8"
echo x32
fi
fi
}
check_prog()
{
type "$@" > /dev/null 2>&1 ||
framework_skip_ "$* is not available"
}
dump_log_and_fail_with()
{
cat < "$LOG" >&2
fail_ "$*"
}
run_prog()
{
if [ $# -eq 0 ]; then
set -- "../$NAME"
fi
args="$*"
"$@" || {
rc=$?
if [ $rc -eq 77 ]; then
skip_ "$args exited with code 77"
else
fail_ "$args failed with code $rc"
fi
}
}
run_prog_skip_if_failed()
{
args="$*"
"$@" || framework_skip_ "$args failed with code $?"
}
try_run_prog()
{
local rc
"$@" > /dev/null || {
rc=$?
if [ $rc -eq 77 ]; then
return 1
else
fail_ "$* failed with code $rc"
fi
}
}
run_strace()
{
> "$LOG" || fail_ "failed to write $LOG"
args="$*"
$STRACE -o "$LOG" "$@" ||
dump_log_and_fail_with "$STRACE $args failed with code $?"
}
run_strace_merge()
{
rm -f -- "$LOG".[0-9]*
run_strace -ff -tt "$@"
"$srcdir"/../src/strace-log-merge "$LOG" > "$LOG" ||
dump_log_and_fail_with 'strace-log-merge failed with code $?'
rm -f -- "$LOG".[0-9]*
}
check_gawk()
{
check_prog gawk
check_prog grep
local program="$1"; shift
if grep '^@include[[:space:]]' < "$program" > /dev/null; then
gawk '@include "/dev/null"' < /dev/null ||
framework_skip_ 'gawk does not support @include'
fi
}
# Usage: [FILE_TO_CHECK [AWK_PROGRAM [ERROR_MESSAGE [EXTRA_AWK_OPTIONS...]]]]
# Check whether AWK_PROGRAM matches FILE_TO_CHECK using gawk.
# If it doesn't, dump FILE_TO_CHECK and fail with ERROR_MESSAGE.
match_awk()
{
local output program error
if [ $# -eq 0 ]; then
output="$LOG"
else
output="$1"; shift
fi
if [ $# -eq 0 ]; then
program="$srcdir/$NAME.awk"
else
program="$1"; shift
fi
if [ $# -eq 0 ]; then
error="$STRACE $args output mismatch"
else
error="$1"; shift
fi
check_gawk "$program"
AWKPATH="$srcdir" gawk -f "$program" "$@" < "$output" || {
cat < "$output"
fail_ "$error"
}
}
# Usage: [FILE_TO_CHECK [FILE_TO_COMPATE_WITH [ERROR_MESSAGE]]]
# Check whether FILE_TO_CHECK differs from FILE_TO_COMPATE_WITH.
# If it does, dump the difference and fail with ERROR_MESSAGE.
match_diff()
{
local output expected error
if [ $# -eq 0 ]; then
output="$LOG"
else
output="$1"; shift
fi
if [ $# -eq 0 ]; then
expected="$srcdir/$NAME.expected"
else
expected="$1"; shift
fi
if [ $# -eq 0 ]; then
error="$STRACE $args output mismatch"
else
error="$1"; shift
fi
check_prog diff
diff -u -- "$expected" "$output" ||
fail_ "$error"
}
# Usage: [FILE_TO_CHECK [FILE_WITH_PATTERNS [ERROR_MESSAGE]]]
# Check whether all patterns listed in FILE_WITH_PATTERNS
# match FILE_TO_CHECK using egrep.
# If at least one of these patterns does not match,
# dump both files and fail with ERROR_MESSAGE.
match_grep()
{
local output patterns error pattern cnt failed= rc negated
if [ $# -eq 0 ]; then
output="$LOG"
else
output="$1"; shift
fi
if [ $# -eq 0 ]; then
patterns="$srcdir/$NAME.expected"
else
patterns="$1"; shift
fi
if [ $# -eq 0 ]; then
error="$STRACE $args output mismatch"
else
error="$1"; shift
fi
check_prog wc
check_prog grep
cnt=1
while read -r pattern; do
negated=0
[ "x${pattern#!}" = "x${pattern}" ] ||
negated=1
rc="$negated"
LC_ALL=C grep -E -x -e "${pattern#!}" < "$output" > /dev/null ||
rc="$((!negated))"
[ 0 = "$rc" ] || {
test -n "$failed" || {
echo 'Failed patterns of expected output:'
failed=1
}
printf '#%d: %s\n' "$cnt" "$pattern"
}
cnt=$((cnt + 1))
done < "$patterns" ||
fail_ "Error reading patterns from \"$patterns\""
test -z "$failed" || {
echo 'Actual output:'
cat < "$output"
fail_ "$error"
}
}
# Usage: run_strace_match_diff [args to run_strace]
run_strace_match_diff()
{
local sed_cmd prog_args
prog_args="../$NAME"
sed_cmd='p'
args="$*"
[ -n "$args" ] && [ -z "${args##*-e trace=*}" -o \
-z "${args##*-etrace=*}" -o \
-z "${args##*--trace=*}" ] ||
set -- -e trace="$NAME" "$@"
set -- "$@" END_OF_ARGUMENTS
while :; do
arg="$1"
shift
case "$arg" in
QUIRK:START-OF-TEST-OUTPUT:*)
str="${arg#QUIRK:START-OF-TEST-OUTPUT:}"
sed_cmd="/$(sed_re_escape "$str")/,\$p"
continue
;;
QUIRK:START-OF-TEST-OUTPUT-REGEX:*)
str="${arg#QUIRK:START-OF-TEST-OUTPUT-REGEX:}"
sed_cmd="/$(sed_slash_escape "$str")/,\$p"
continue
;;
QUIRK:PROG-ARGS:*)
prog_args="../$NAME ${arg#QUIRK:PROG-ARGS:}"
continue
;;
END_OF_ARGUMENTS)
break
;;
esac
set -- "$@" "$arg"
done
run_prog > /dev/null
args="$prog_args"
run_strace "$@" $args > "$EXP"
sed -n "$sed_cmd" < "$LOG" > "$OUT"
match_diff "$OUT" "$EXP"
}
# Usage: run_strace_match_grep [args to run_strace]
run_strace_match_grep()
{
args="$*"
[ -n "$args" ] && [ -z "${args##*-e trace=*}" -o \
-z "${args##*-etrace=*}" -o \
-z "${args##*--trace=*}" ] ||
set -- -e trace="$NAME" "$@"
run_prog > /dev/null
run_strace "$@" $args > "$EXP"
match_grep "$LOG" "$EXP"
}
# Print kernel version code.
# usage: kernel_version_code $(uname -r)
kernel_version_code()
{
(
set -f
IFS=.
set -- $1 0 0
v1="${1%%[!0-9]*}" && [ -n "$v1" ] || v1=0
v2="${2%%[!0-9]*}" && [ -n "$v2" ] || v2=0
v3="${3%%[!0-9]*}" && [ -n "$v3" ] || v3=0
echo "$((v1 * 65536 + v2 * 256 + v3))"
)
}
# Usage: require_min_kernel_version_or_skip 3.0
require_min_kernel_version_or_skip()
{
local uname_r
uname_r="$(uname -r)"
[ "$(kernel_version_code "$uname_r")" -ge \
"$(kernel_version_code "$1")" ] ||
skip_ "the kernel release $uname_r is not $1 or newer"
}
# Usage: require_max_kernel_version_or_skip 6.11
require_max_kernel_version_or_skip()
{
local uname_r
uname_r="$(uname -r)"
[ "$(kernel_version_code "$uname_r")" -lt \
"$(kernel_version_code "$1")" ] ||
skip_ "the kernel release $uname_r is $1 or newer"
}
# Usage: require_min_nproc 2
require_min_nproc()
{
local min_nproc
min_nproc="$1"; shift
check_prog nproc
local nproc
nproc="$(nproc)"
[ "$nproc" -ge "$min_nproc" ] ||
framework_skip_ "nproc = $nproc is less than $min_nproc"
}
# Usage: grep_pid_status $pid GREP-OPTIONS...
grep_pid_status()
{
local pid
pid=$1; shift
cat < "/proc/$pid/status" | grep "$@"
}
# Subtracts one program set from another.
# If an optional regular expression is specified, the lines in the minuend file
# that match this regular expression are elso excluded from the output.
#
# Usage: prog_set_subtract minuend_file subtrahend_file [subtrahend_regexp]
prog_set_subtract()
{
local min sub re pat
min="$1"; shift
sub="$1"; shift
re="${1-}"
pat="$re|$(sed 's/[[:space:]].*//' < "$sub" | tr -s '\n' '|')"
grep -E -v -x -e "$pat" < "$min"
}
# Usage: test_pure_prog_set [--expfile FILE] COMMON_ARGS < tests_file
# stdin should consist of lines in "test_name strace_args..." format.
test_pure_prog_set()
{
local expfile
expfile="$EXP"
while [ -n "$1" ]; do
case "$1" in
--expfile)
shift
expfile="$1"
shift
;;
*)
break
;;
esac
done
while read -r t prog_args; do {
# skip lines beginning with "#" symbol
[ "${t###}" = "$t" ] || continue
try_run_prog "../$t" || continue
run_strace $prog_args "$@" "../$t" > "$expfile"
case "$STRACE_ARCH:$MIPS_ABI:$NAME" in
mips:o32:*creds)
sed -i '/^prctl(PR_GET_FP_MODE) *= 0$/d' "$LOG"
;;
esac
match_diff "$LOG" "$expfile"
} < /dev/null; done
}
# Run strace against list of programs put in "$NAME.in" and then against
# a random selection of the binaries from the rest of pure_executables.list
# with the expectation of empty output in the latter case.
#
# Usage: source this file after init.sh and call:
# test_trace_expr subtrahend_regexp strace_args
# Environment:
# $NAME: test name, used for "$NAME.in" file containing list of tests
# for positive trace expression match;
# $srcdir: used to find pure_executables.list and "$NAME.in" files.
# $TRACE_TESTS_SAMPLE:
# number of binaries to pick from the remainder
# of pure_executables.list to check for the absence of output.
# Files created:
# negative.list: File containing list of tests for negative match.
test_trace_expr()
{
local subtrahend_regexp
subtrahend_regexp="$1"; shift
test_pure_prog_set "$@" < "$srcdir/$NAME.in"
prog_set_subtract "$srcdir/pure_executables.list" "$srcdir/$NAME.in" \
"$subtrahend_regexp" | shuf -n "${TRACE_TESTS_SAMPLE}" > negative.list
test_pure_prog_set --expfile /dev/null -qq -esignal=none "$@" \
< negative.list
}
test_prog_set()
{
test_pure_prog_set "$@" < "$srcdir/$NAME.in"
}
test_pidns_run_strace()
{
local parent_pid init_pid sed_cmd prog_args
prog_args="../$NAME"
sed_cmd='p'
check_prog tail
check_prog cut
check_prog grep
set -- "$@" END_OF_ARGUMENTS
while :; do
arg="$1"
shift
case "$arg" in
QUIRK:START-OF-TEST-OUTPUT:*)
str="${arg#QUIRK:START-OF-TEST-OUTPUT:}"
str="$(sed_re_escape "${str}")"
# There could be -r/-t output between pid and "+++"
sed_cmd="/${str}/,/^[1-9][0-9]* .*+++ exited with 0 +++\$/p"
continue
;;
QUIRK:START-OF-TEST-OUTPUT-REGEX:*)
str="${arg#QUIRK:START-OF-TEST-OUTPUT-REGEX:}"
str="$(sed_slash_escape "${str}")"
# There could be -r/-t output between pid and "+++"
sed_cmd="/${str}/,/^[1-9][0-9]* .*+++ exited with 0 +++\$/p"
continue
;;
QUIRK:PROG-ARGS:*)
prog_args="../$NAME ${arg#QUIRK:PROG-ARGS:}"
continue
;;
END_OF_ARGUMENTS)
break
;;
esac
set -- "$@" "$arg"
done
run_prog > /dev/null
args="$prog_args"
run_strace --decode-pids=pidns --status=!unavailable -f "$@" $args > "$EXP"
# filter out logs made by the parent or init process of the pidns test
parent_pid="$(tail -n 2 $LOG | head -n 1 | cut -d' ' -f1)"
init_pid="$(tail -n 1 $LOG | cut -d' ' -f1)"
grep -E -v "^($parent_pid|$init_pid) " "$LOG" | sed -n "$sed_cmd" > "$OUT"
match_diff "$OUT" "$EXP"
}
test_pidns()
{
check_prog unshare
unshare -Urpf true || framework_skip_ "unshare -Urpf true failed"
test_pidns_run_strace "$@"
# test PID translation when /proc is mounted from an other namespace
STRACE="unshare -Urpf $STRACE"
test_pidns_run_strace "$@"
}
check_scno_tampering()
{
case "$STRACE_ARCH" in
arm)
# PTRACE_SET_SYSCALL is supported by linux kernel
# starting with commit v2.6.16-rc1~107^2.
require_min_kernel_version_or_skip 2.6.16 ;;
aarch64)
# NT_ARM_SYSTEM_CALL regset is supported by linux kernel
# starting with commit v3.19-rc1~59^2~16.
require_min_kernel_version_or_skip 3.19 ;;
hppa)
# Syscall number and return value modification did not work
# properly before commit v4.5-rc7~31^2~1.
require_min_kernel_version_or_skip 4.5 ;;
sparc*)
# Reloading the syscall number from %g1 register is supported
# by linux kernel starting with commit v4.5-rc7~35^2~3.
require_min_kernel_version_or_skip 4.5 ;;
mips)
# Only the native ABI is supported by the kernel properly, see
# https://lists.strace.io/pipermail/strace-devel/2017-January/005896.html
msg_prefix="mips $MIPS_ABI scno tampering does not work"
uname_m="$(uname -m)"
case "$MIPS_ABI:$uname_m" in
n64:mips64) ;;
o32:mips)
# is it really mips32?
if ../is_linux_mips_n64; then
skip_ "$msg_prefix on mips n64 yet"
fi
;;
*) skip_ "$msg_prefix on $uname_m yet" ;;
esac ;;
esac
}
check_prog cat
check_prog rm
case "$ME_" in
*.gen.test) NAME="${ME_%.gen.test}" ;;
*.test) NAME="${ME_%.test}" ;;
*) NAME=
esac
STRACE_EXE=
if [ -n "$NAME" ]; then
TESTDIR="$NAME.dir"
rm -rf -- "$TESTDIR" &&
mkdir -- "$TESTDIR" &&
cd "$TESTDIR" ||
framework_failure_ "Cannot setup $TESTDIR"
case "$srcdir" in
/*) ;;
*) srcdir="../$srcdir" ;;
esac
[ -n "${STRACE-}" ] || {
STRACE=../../src/strace
case "${LOG_COMPILER-} ${LOG_FLAGS-}" in
*--suppressions=*--error-exitcode=*--tool=*)
STRACE_EXE="$STRACE"
# add valgrind command prefix
STRACE="${LOG_COMPILER-} ${LOG_FLAGS-} $STRACE"
;;
esac
}
trap 'dump_log_and_fail_with "time limit ($TIMEOUT_DURATION) exceeded"' XCPU
else
: "${STRACE:=../src/strace}"
fi
# Export $STRACE_EXE to check_PROGRAMS.
: "${STRACE_EXE:=$STRACE}"
export STRACE_EXE
: "${TIMEOUT_DURATION:=1500}"
: "${SLEEP_A_BIT:=sleep 1}"
: "${TRACE_TESTS_SAMPLE:=100}"
[ -z "${VERBOSE-}" ] ||
set -x
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