add memory limit

runner/result.go

@@ -11,6 +11,7 @@ const (
 	StatusPass Status = iota
 	StatusFail
 	StatusTLE
+	StatusMLE
 	StatusBuildError
 	StatusRuntimeError
 )
@@ -23,6 +24,8 @@ func (s Status) String() string {
 		return "FAIL"
 	case StatusTLE:
 		return "TLE"
+	case StatusMLE:
+		return "MLE"
 	case StatusBuildError:
 		return "BUILD_ERROR"
 	case StatusRuntimeError:
@@ -37,6 +40,9 @@ type TestResult struct {
 	Status  Status
 	Elapsed time.Duration
 
+	PeakMemory  int64 // bytes; 0 if not measured
+	MemoryLimit int64 // bytes; 0 if unlimited
+
 	Failures []string
 
 	ActualStdout string