75 lines
2.1 KiB
Go
75 lines
2.1 KiB
Go
// +build matprofile
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package gocv
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/*
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#include <stdlib.h>
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#include "core.h"
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*/
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import (
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"C"
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)
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import (
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"runtime/pprof"
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)
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// MatProfile a pprof.Profile that contains stack traces that led to (currently)
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// unclosed Mat's creations. Every time a Mat is created, the stack trace is
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// added to this profile and every time the Mat is closed the trace is removed.
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// In a program that is not leaking, this profile's count should not
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// continuously increase and ideally when a program is terminated the count
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// should be zero. You can get the count at any time with:
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//
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// gocv.MatProfile.Count()
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//
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// and you can display the current entries with:
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//
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// var b bytes.Buffer
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// gocv.MatProfile.WriteTo(&b, 1)
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// fmt.Print(b.String())
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//
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// This will display stack traces of where the unclosed Mats were instantiated.
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// For example, the results could look something like this:
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//
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// 1 @ 0x4146a0c 0x4146a57 0x4119666 0x40bb18f 0x405a841
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// # 0x4146a0b gocv.io/x/gocv.newMat+0x4b /go/src/gocv.io/x/gocv/core.go:120
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// # 0x4146a56 gocv.io/x/gocv.NewMat+0x26 /go/src/gocv.io/x/gocv/core.go:126
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// # 0x4119665 gocv.io/x/gocv.TestMat+0x25 /go/src/gocv.io/x/gocv/core_test.go:29
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// # 0x40bb18e testing.tRunner+0xbe /usr/local/Cellar/go/1.11/libexec/src/testing/testing.go:827
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//
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// Furthermore, if the program is a long running process or if gocv is being used on a
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// web server, it may be helpful to install the HTTP interface using:
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//
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// import _ "net/http/pprof"
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//
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// In order to include the MatProfile custom profiler, you MUST build or run your application
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// or tests using the following build tag:
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// -tags matprofile
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//
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// For more information, see the runtime/pprof package documentation.
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var MatProfile *pprof.Profile
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func init() {
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profName := "gocv.io/x/gocv.Mat"
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MatProfile = pprof.Lookup(profName)
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if MatProfile == nil {
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MatProfile = pprof.NewProfile(profName)
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}
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}
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// newMat returns a new Mat from a C Mat and records it to the MatProfile.
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func newMat(p C.Mat) Mat {
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m := Mat{p: p}
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MatProfile.Add(p, 1)
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return m
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}
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// Close the Mat object.
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func (m *Mat) Close() error {
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C.Mat_Close(m.p)
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MatProfile.Remove(m.p)
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m.p = nil
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return nil
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}
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