protomem_test.go

Documentation: runtime/pprof

		 1  // Copyright 2016 The Go Authors. All rights reserved.
		 2  // Use of this source code is governed by a BSD-style
		 3  // license that can be found in the LICENSE file.
		 4  
		 5  package pprof
		 6  
		 7  import (
		 8  	"bytes"
		 9  	"internal/profile"
		10  	"runtime"
		11  	"testing"
		12  )
		13  
		14  func TestConvertMemProfile(t *testing.T) {
		15  	addr1, addr2, map1, map2 := testPCs(t)
		16  
		17  	// MemProfileRecord stacks are return PCs, so add one to the
		18  	// addresses recorded in the "profile". The proto profile
		19  	// locations are call PCs, so conversion will subtract one
		20  	// from these and get back to addr1 and addr2.
		21  	a1, a2 := uintptr(addr1)+1, uintptr(addr2)+1
		22  	rate := int64(512 * 1024)
		23  	rec := []runtime.MemProfileRecord{
		24  		{AllocBytes: 4096, FreeBytes: 1024, AllocObjects: 4, FreeObjects: 1, Stack0: [32]uintptr{a1, a2}},
		25  		{AllocBytes: 512 * 1024, FreeBytes: 0, AllocObjects: 1, FreeObjects: 0, Stack0: [32]uintptr{a2 + 1, a2 + 2}},
		26  		{AllocBytes: 512 * 1024, FreeBytes: 512 * 1024, AllocObjects: 1, FreeObjects: 1, Stack0: [32]uintptr{a1 + 1, a1 + 2, a2 + 3}},
		27  	}
		28  
		29  	periodType := &profile.ValueType{Type: "space", Unit: "bytes"}
		30  	sampleType := []*profile.ValueType{
		31  		{Type: "alloc_objects", Unit: "count"},
		32  		{Type: "alloc_space", Unit: "bytes"},
		33  		{Type: "inuse_objects", Unit: "count"},
		34  		{Type: "inuse_space", Unit: "bytes"},
		35  	}
		36  	samples := []*profile.Sample{
		37  		{
		38  			Value: []int64{2050, 2099200, 1537, 1574400},
		39  			Location: []*profile.Location{
		40  				{ID: 1, Mapping: map1, Address: addr1},
		41  				{ID: 2, Mapping: map2, Address: addr2},
		42  			},
		43  			NumLabel: map[string][]int64{"bytes": {1024}},
		44  		},
		45  		{
		46  			Value: []int64{1, 829411, 1, 829411},
		47  			Location: []*profile.Location{
		48  				{ID: 3, Mapping: map2, Address: addr2 + 1},
		49  				{ID: 4, Mapping: map2, Address: addr2 + 2},
		50  			},
		51  			NumLabel: map[string][]int64{"bytes": {512 * 1024}},
		52  		},
		53  		{
		54  			Value: []int64{1, 829411, 0, 0},
		55  			Location: []*profile.Location{
		56  				{ID: 5, Mapping: map1, Address: addr1 + 1},
		57  				{ID: 6, Mapping: map1, Address: addr1 + 2},
		58  				{ID: 7, Mapping: map2, Address: addr2 + 3},
		59  			},
		60  			NumLabel: map[string][]int64{"bytes": {512 * 1024}},
		61  		},
		62  	}
		63  	for _, tc := range []struct {
		64  		name							string
		65  		defaultSampleType string
		66  	}{
		67  		{"heap", ""},
		68  		{"allocs", "alloc_space"},
		69  	} {
		70  		t.Run(tc.name, func(t *testing.T) {
		71  			var buf bytes.Buffer
		72  			if err := writeHeapProto(&buf, rec, rate, tc.defaultSampleType); err != nil {
		73  				t.Fatalf("writing profile: %v", err)
		74  			}
		75  
		76  			p, err := profile.Parse(&buf)
		77  			if err != nil {
		78  				t.Fatalf("profile.Parse: %v", err)
		79  			}
		80  
		81  			checkProfile(t, p, rate, periodType, sampleType, samples, tc.defaultSampleType)
		82  		})
		83  	}
		84  }
		85
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