[PATCH v7 020/104] tests/tcg/meson.build: add wrapper check_plugin_output

This wrapper runs a qemu command, record command output and plugin
output, and forward both to a check script.
We use this pattern in several plugin tests (for instance, with
validate-memory-counts.py).

Tested-by: Alex Bennée <[email protected]>
Reviewed-by: Manos Pitsidianakis <[email protected]>
Tested-by: Aniket Sahu <[email protected]>
Signed-off-by: Pierrick Bouvier <[email protected]>
---
 tests/tcg/meson.build                    |  1 +
 tests/tcg/scripts/check_plugin_output.sh | 25 ++++++++++++++++++++++++
 2 files changed, 26 insertions(+)
 create mode 100755 tests/tcg/scripts/check_plugin_output.sh

diff --git a/tests/tcg/meson.build b/tests/tcg/meson.build
index 328592b28bc..779f9043abb 100644
--- a/tests/tcg/meson.build
+++ b/tests/tcg/meson.build
@@ -5,6 +5,7 @@ if config_host.has_key('GDB')
   gdb_progs = [config_host['GDB'], gdb_progs]
 endif
 gdb = find_program(gdb_progs, required: false)
+prog_check_plugin_output = find_program('./scripts/check_plugin_output.sh')
 prog_gdb_test = find_program('../guest-debug/run-test.py')
 prog_record_replay = find_program('./scripts/record_replay.sh')
 prog_run_and_diff = find_program('./scripts/run_and_diff.sh')
diff --git a/tests/tcg/scripts/check_plugin_output.sh b/tests/tcg/scripts/check_plugin_output.sh
new file mode 100755
index 00000000000..d942082ad86
--- /dev/null
+++ b/tests/tcg/scripts/check_plugin_output.sh
@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+set -euo pipefail
+
+if [ $# -lt 3 ]; then
+    echo "check_plugin_output: check_cmd qemu_bin [args]..." 1>&2
+    exit 1
+fi
+check_cmd="$1"; shift
+check_cmd_args=""
+while [[ "$1" == "-"* ]]; do
+    check_cmd_args="$check_cmd_args $1"
+    shift
+done
+
+qemu="$1"; shift
+tmp=$(mktemp -d)
+trap "rm -rf $tmp" EXIT
+
+set -x
+
+$qemu -d plugin -D $tmp/plugin "$@" |& tee $tmp/output
+cat $tmp/plugin
+$check_cmd $check_cmd_args $tmp/output $tmp/plugin
-- 
2.43.0