mirror of https://github.com/perkeep/perkeep.git
64 lines
1.3 KiB
Go
64 lines
1.3 KiB
Go
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/*
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Copyright 2013 Google Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package leak
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import (
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"bytes"
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"fmt"
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"log"
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"runtime"
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)
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// A Checker checks for leaks.
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type Checker struct {
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pc []uintptr // nil once closed
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}
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// NewChecker returns a Checker, remembering the stack trace.
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func NewChecker() *Checker {
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pc := make([]uintptr, 50)
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ch := &Checker{pc[:runtime.Callers(0, pc)]}
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runtime.SetFinalizer(ch, (*Checker).finalize)
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return ch
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}
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func (c *Checker) Close() {
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if c != nil {
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c.pc = nil
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}
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}
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func (c *Checker) finalize() {
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if c == nil || c.pc == nil {
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return
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}
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nTestLeaks++ // for testing
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var buf bytes.Buffer
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buf.WriteString("Leak at:\n")
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for _, pc := range c.pc {
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f := runtime.FuncForPC(pc)
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if f == nil {
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break
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}
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file, line := f.FileLine(f.Entry())
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fmt.Fprintf(&buf, " %s:%d\n", file, line)
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}
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log.Println(buf.String())
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}
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var nTestLeaks int
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