nmtst/valgrind: allow calling 'run-test-valgrind.sh' script directly

When you want to run valgrind for a test, you either had to
invoke valgrind manually, or doing it via `make check` (provided
you configured --with-valgrind).

Make it more convenient to run valgrind by passing the test
to run to the "run-test-valgrind.sh" wrapper.

This also allows to pass -p/-s to the test, which is not possible
during `make check` because selecting tests conflicts with "--tap".
The following invocations are largely equivalent and work as
expected:

  $ ./tools/run-test-valgrind.sh ./src/platform/tests/test-link-linux -p /link/software/detect/vlan

  $ NMTST_DEBUG=no-debug,p=/link/software/detect/vlan ./tools/run-test-valgrind.sh ./src/platform/tests/test-link-linux

(cherry picked from commit 4dacf0b1ad)

configure.ac

@@ -891,7 +891,7 @@ else
 	fi
 fi
 AS_IF([test "$with_valgrind" != "no"],
-	AC_SUBST(VALGRIND_RULES, 'LOG_COMPILER = "$(top_srcdir)/tools/run-test-valgrind.sh" "$(LIBTOOL)" "$(with_valgrind)" '"$with_valgrind_suppressions"),
+	AC_SUBST(VALGRIND_RULES, 'LOG_COMPILER = "$(top_srcdir)/tools/run-test-valgrind.sh" --called-from-make "$(LIBTOOL)" "$(with_valgrind)" '"$with_valgrind_suppressions"),
 	AC_SUBST(VALGRIND_RULES, []))
 AM_CONDITIONAL(WITH_VALGRIND, test "${with_valgrind}" != "no")
 

tools/run-test-valgrind.sh

@@ -1,19 +1,93 @@
-#!/bin/sh
+#!/bin/bash
+
+die() {
+    echo "$@"
+    exit 5
+}
+
+SCRIPT_PATH="${SCRIPT_PATH:-$(readlink -f "$(dirname "$0")")}"
 
-LIBTOOL="$1"; shift
-VALGRIND="$1"; shift
-SUPPRESSIONS="$1"; shift
 VALGRIND_ERROR=37
-if [ "$1" = "--launch-dbus" ]; then
+if [ "$1" == "--called-from-make" ]; then
+    shift
+    NMTST_LIBTOOL=($1 --mode=execute); shift
+    NMTST_VALGRIND="$1"; shift
+    SUPPRESSIONS="$1"; shift
+    if [ "$1" = "--launch-dbus" ]; then
+        NMTST_LAUNCH_DBUS=yes
+        shift
+    else
+        NMTST_LAUNCH_DBUS=no
+    fi
+    TEST="$1"; shift
+else
+    if [ -n "${NMTST_LIBTOOL-:x}" ]; then
+        NMTST_LIBTOOL=(sh "$SCRIPT_PATH/../libtool" --mode=execute)
+    elif [ -n "${NMTST_LIBTOOL-x}" ]; then
+        NMTST_LIBTOOL=()
+    else
+        NMTST_LIBTOOL=($NMTST_LIBTOOL --mode=execute)
+    fi
+    for a in "$@"; do
+        case "$a" in
+        "--launch-dbus")
+            NMTST_LAUNCH_DBUS=yes
+            shift
+            ;;
+        "--no-launch-dbus"|"-D")
+            NMTST_LAUNCH_DBUS=no
+            shift
+            ;;
+        "--no-libtool")
+            NMTST_LIBTOOL=()
+            shift
+            ;;
+        "--")
+            shift
+            break
+            ;;
+        *)
+            break
+            ;;
+        esac
+    done
+    # we support calling the script directly. In this case,
+    # only pass the path to the test to run.
+    TEST="$1"; shift
+    NMTST_VALGRIND="${NMTST_VALGRIND:-valgrind}"
+    if [ "$SUPPRESSIONS" == "" ]; then
+        SUPPRESSIONS="$SCRIPT_PATH/../valgrind.suppressions"
+    fi
+
+    [ -x "$TEST" ] || die "Test \"$TEST\" does not exist"
+
+    TEST_PATH="$(readlink -f "$(dirname "$TEST")")"
+
+    if [ -n "${NMTST_LAUNCH_DBUS-x}" ]; then
+        # autodetect whether to launch D-Bus based on the test path.
+        if [[ $TEST_PATH == */libnm/tests || $TEST_PATH == */libnm-glib/tests ]]; then
+            NMTST_LAUNCH_DBUS=yes
+        else
+            NMTST_LAUNCH_DBUS=no
+        fi
+    fi
+
+    # some tests require you to cd into the base directory.
+    # do that.
+    if [ "$NMTST_VALGRIND_NO_CD" == "" ]; then
+        cd "$TEST_PATH"
+        TEST="./$(basename "$TEST")"
+    fi
+fi
+
+if [ "$NMTST_LAUNCH_DBUS" == "yes" ]; then
     # Spawn DBus
     eval `dbus-launch --sh-syntax`
     trap "kill $DBUS_SESSION_BUS_PID" EXIT
-    shift
 fi
-TEST="$1"
 
 if [ "$NMTST_NO_VALGRIND" != "" ]; then
-	"$@"
+	"$TEST" "$@"
 	exit $?
 fi
 
@@ -21,7 +95,7 @@ LOGFILE="valgrind-`echo "$TEST" | tr -cd '[:alpha:]-'`.log"
 
 export G_SLICE=always-malloc
 export G_DEBUG=gc-friendly
-$LIBTOOL --mode=execute "$VALGRIND" \
+"${NMTST_LIBTOOL[@]}" "$NMTST_VALGRIND" \
 	--quiet \
 	--error-exitcode=$VALGRIND_ERROR \
 	--leak-check=full \
@@ -29,6 +103,7 @@ $LIBTOOL --mode=execute "$VALGRIND" \
 	--suppressions="$SUPPRESSIONS" \
 	--num-callers=100 \
 	--log-file="$LOGFILE" \
+	"$TEST" \
 	"$@"
 RESULT=$?