adds test harness

test/threadx/run_threadx_test.sh

@@ -0,0 +1,48 @@
+#!/bin/bash
+set -euo pipefail
+
+simulator="$1"
+isa="$2"
+elf="$3"
+
+if [ ! -x "$simulator" ]; then
+    echo "Simulator not found or not executable: $simulator" >&2
+    exit 2
+fi
+
+if [ ! -f "$elf" ]; then
+    echo "ELF not found: $elf" >&2
+    exit 2
+fi
+
+log_file=$(mktemp)
+trap 'rm -f "$log_file"' EXIT
+
+"$simulator" \
+    --isa="$isa" \
+    -f "$elf" \
+    -p tb.top.core.finish_condition=1 \
+    -m 10s \
+    | tee "$log_file"
+
+summary_line=$(grep -F "**** Test Summary:" "$log_file" | tail -n 1 || true)
+if [ -z "$summary_line" ]; then
+    echo "Missing ThreadX test summary in simulator output" >&2
+    exit 1
+fi
+
+read -r passed failed errors <<EOF_SUMMARY
+$(echo "$summary_line" | sed -n 's/.*Tests Passed:[[:space:]]*\([0-9][0-9]*\)[[:space:]]*Tests Failed:[[:space:]]*\([0-9][0-9]*\)[[:space:]]*System Errors:[[:space:]]*\([0-9][0-9]*\).*/\1 \2 \3/p')
+EOF_SUMMARY
+
+if [ -z "${passed:-}" ] || [ -z "${failed:-}" ] || [ -z "${errors:-}" ]; then
+    echo "Could not parse ThreadX test summary: $summary_line" >&2
+    exit 1
+fi
+
+if [ "$failed" -ne 0 ] || [ "$errors" -ne 0 ]; then
+    echo "ThreadX regression reported failure: passed=$passed failed=$failed errors=$errors" >&2
+    exit 1
+fi
+
+exit 0