1 files changed, 84 insertions, 0 deletions
diff --git a/src/runtime/pprof/protomem_test.go b/src/runtime/pprof/protomem_test.go
new file mode 100644
index 0000000..156f628
--- /dev/null
+++ b/src/runtime/pprof/protomem_test.go
@@ -0,0 +1,84 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package pprof
+
+import (
+	"bytes"
+	"internal/profile"
+	"runtime"
+	"testing"
+)
+
+func TestConvertMemProfile(t *testing.T) {
+	addr1, addr2, map1, map2 := testPCs(t)
+
+	// MemProfileRecord stacks are return PCs, so add one to the
+	// addresses recorded in the "profile". The proto profile
+	// locations are call PCs, so conversion will subtract one
+	// from these and get back to addr1 and addr2.
+	a1, a2 := uintptr(addr1)+1, uintptr(addr2)+1
+	rate := int64(512 * 1024)
+	rec := []runtime.MemProfileRecord{
+		{AllocBytes: 4096, FreeBytes: 1024, AllocObjects: 4, FreeObjects: 1, Stack0: [32]uintptr{a1, a2}},
+		{AllocBytes: 512 * 1024, FreeBytes: 0, AllocObjects: 1, FreeObjects: 0, Stack0: [32]uintptr{a2 + 1, a2 + 2}},
+		{AllocBytes: 512 * 1024, FreeBytes: 512 * 1024, AllocObjects: 1, FreeObjects: 1, Stack0: [32]uintptr{a1 + 1, a1 + 2, a2 + 3}},
+	}
+
+	periodType := &profile.ValueType{Type: "space", Unit: "bytes"}
+	sampleType := []*profile.ValueType{
+		{Type: "alloc_objects", Unit: "count"},
+		{Type: "alloc_space", Unit: "bytes"},
+		{Type: "inuse_objects", Unit: "count"},
+		{Type: "inuse_space", Unit: "bytes"},
+	}
+	samples := []*profile.Sample{
+		{
+			Value: []int64{2050, 2099200, 1537, 1574400},
+			Location: []*profile.Location{
+				{ID: 1, Mapping: map1, Address: addr1},
+				{ID: 2, Mapping: map2, Address: addr2},
+			},
+			NumLabel: map[string][]int64{"bytes": {1024}},
+		},
+		{
+			Value: []int64{1, 829411, 1, 829411},
+			Location: []*profile.Location{
+				{ID: 3, Mapping: map2, Address: addr2 + 1},
+				{ID: 4, Mapping: map2, Address: addr2 + 2},
+			},
+			NumLabel: map[string][]int64{"bytes": {512 * 1024}},
+		},
+		{
+			Value: []int64{1, 829411, 0, 0},
+			Location: []*profile.Location{
+				{ID: 5, Mapping: map1, Address: addr1 + 1},
+				{ID: 6, Mapping: map1, Address: addr1 + 2},
+				{ID: 7, Mapping: map2, Address: addr2 + 3},
+			},
+			NumLabel: map[string][]int64{"bytes": {512 * 1024}},
+		},
+	}
+	for _, tc := range []struct {
+		name              string
+		defaultSampleType string
+	}{
+		{"heap", ""},
+		{"allocs", "alloc_space"},
+	} {
+		t.Run(tc.name, func(t *testing.T) {
+			var buf bytes.Buffer
+			if err := writeHeapProto(&buf, rec, rate, tc.defaultSampleType); err != nil {
+				t.Fatalf("writing profile: %v", err)
+			}
+
+			p, err := profile.Parse(&buf)
+			if err != nil {
+				t.Fatalf("profile.Parse: %v", err)
+			}
+
+			checkProfile(t, p, rate, periodType, sampleType, samples, tc.defaultSampleType)
+		})
+	}
+}