// Copyright 2016 The Cockroach Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
// implied. See the License for the specific language governing
// permissions and limitations under the License.

// +build gc

package logictest

import (
	"os"
	"runtime/trace"
)

func (t *logicTest) traceStart(filename string) {
	if t.traceFile != nil {
		t.Fatalf("tracing already active")
	}
	var err error
	t.traceFile, err = os.Create(filename)
	if err != nil {
		t.Fatalf("unable to open trace output file: %s", err)
	}
	if err := trace.Start(t.traceFile); err != nil {
		t.Fatalf("unable to start tracing: %s", err)
	}
}

func (t *logicTest) traceStop() {
	if t.traceFile != nil {
		trace.Stop()
		t.traceFile.Close()
		t.traceFile = nil
	}
}
