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Reduce the use of grep

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Avoid using the external command grep for simple string-based checks.
Prefer a case statement. This improves performance.

The performance improvement is moderate but noticeable when skipping
most tests. When a test is run, the cost of the associated grep calls
is negligible. In this commit, I focused on the uses of grep that can
be easily replaced and that are executed a large number of times.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
This commit is contained in:
Gilles Peskine 2020-08-26 21:53:33 +02:00
parent 3cfee6c71e
commit 5bf15b6d63
1 changed files with 39 additions and 26 deletions
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63
tests/ssl-opt.sh
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@ -184,6 +184,14 @@ get_options() {
done
}
# Read boolean configuration options from config.h for easy and quick
# testing. Skip non-boolean options (with something other than spaces
# and a comment after "#define SYMBOL"). The variable contains a
# space-separated list of symbols.
CONFIGS_ENABLED=" $(<"$CONFIG_H" \
sed -n 's!^ *#define *\([A-Za-z][0-9A-Z_a-z]*\) *\(/*\)*!\1!p' |
tr '\n' ' ')"
# Skip next test; use this macro to skip tests which are legitimate
# in theory and expected to be re-introduced at some point, but
# aren't expected to succeed at the moment due to problems outside
@ -194,16 +202,17 @@ skip_next_test() {
# skip next test if the flag is not enabled in config.h
requires_config_enabled() {
if grep "^#define $1" $CONFIG_H > /dev/null; then :; else
SKIP_NEXT="YES"
fi
case $CONFIGS_ENABLED in
*" $1 "*) :;;
*) SKIP_NEXT="YES";;
esac
}
# skip next test if the flag is enabled in config.h
requires_config_disabled() {
if grep "^#define $1" $CONFIG_H > /dev/null; then
SKIP_NEXT="YES"
fi
case $CONFIGS_ENABLED in
*" $1 "*) SKIP_NEXT="YES";;
esac
}
get_config_value_or_default() {
@ -422,17 +431,21 @@ fail() {
# is_polar <cmd_line>
is_polar() {
echo "$1" | grep 'ssl_server2\|ssl_client2' > /dev/null
case "$1" in
*ssl_client2*) true;;
*ssl_server2*) true;;
*) false;;
esac
}
# openssl s_server doesn't have -www with DTLS
check_osrv_dtls() {
if echo "$SRV_CMD" | grep 's_server.*-dtls' >/dev/null; then
case "$SRV_CMD" in
*s_server*-dtls*)
NEEDS_INPUT=1
SRV_CMD="$( echo $SRV_CMD | sed s/-www// )"
else
NEEDS_INPUT=0
fi
SRV_CMD="$( echo $SRV_CMD | sed s/-www// )";;
*) NEEDS_INPUT=0;;
esac
}
# provide input to commands that need it
@ -548,11 +561,10 @@ wait_client_done() {
# check if the given command uses dtls and sets global variable DTLS
detect_dtls() {
if echo "$1" | grep 'dtls=1\|-dtls1\|-u' >/dev/null; then
DTLS=1
else
DTLS=0
fi
case "$1" in
*dtls=1*|-dtls|-u) DTLS=1;;
*) DTLS=0;;
esac
}
# Usage: run_test name [-p proxy_cmd] srv_cmd cli_cmd cli_exit [option [...]]
@ -577,10 +589,11 @@ run_test() {
print_name "$NAME"
# Do we only run numbered tests?
if [ "X$RUN_TEST_NUMBER" = "X" ]; then :
elif echo ",$RUN_TEST_NUMBER," | grep ",$TESTS," >/dev/null; then :
else
SKIP_NEXT="YES"
if [ -n "$RUN_TEST_NUMBER" ]; then
case ",$RUN_TEST_NUMBER," in
*",$TESTS,"*) :;;
*) SKIP_NEXT="YES";;
esac
fi
# should we skip?
@ -606,10 +619,10 @@ run_test() {
shift 3
# Check if test uses files
TEST_USES_FILES=$(echo "$SRV_CMD $CLI_CMD" | grep "\.\(key\|crt\|pem\)" )
if [ ! -z "$TEST_USES_FILES" ]; then
requires_config_enabled MBEDTLS_FS_IO
fi
case "$SRV_CMD $CLI_CMD" in
*data_files/*)
requires_config_enabled MBEDTLS_FS_IO;;
esac
# should we skip?
if [ "X$SKIP_NEXT" = "XYES" ]; then