Adding upstream version 1.22.1.upstream/1.22.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1850 insertions, 0 deletions

diff --git a/test/gcgort.go b/test/gcgort.go
new file mode 100644
index 0000000..973e796
--- /dev/null
+++ b/test/gcgort.go
@@ -0,0 +1,1850 @@
+// run
+
+// Copyright 2018 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.
+
+// Test independent goroutines modifying a comprehensive
+// variety of vars during aggressive garbage collection.
+
+// The point is to catch GC regressions like fixedbugs/issue22781.go
+
+package main
+
+import (
+	"errors"
+	"runtime"
+	"runtime/debug"
+	"sync"
+)
+
+const (
+	goroutines = 8
+	allocs     = 8
+	mods       = 8
+
+	length = 9
+)
+
+func main() {
+	debug.SetGCPercent(1)
+	var wg sync.WaitGroup
+	for i := 0; i < goroutines; i++ {
+		for _, t := range types {
+			err := t.valid()
+			if err != nil {
+				panic(err)
+			}
+			wg.Add(1)
+			go func(f modifier) {
+				var wg2 sync.WaitGroup
+				for j := 0; j < allocs; j++ {
+					wg2.Add(1)
+					go func() {
+						f.t()
+						wg2.Done()
+					}()
+					wg2.Add(1)
+					go func() {
+						f.pointerT()
+						wg2.Done()
+					}()
+					wg2.Add(1)
+					go func() {
+						f.arrayT()
+						wg2.Done()
+					}()
+					wg2.Add(1)
+					go func() {
+						f.sliceT()
+						wg2.Done()
+					}()
+					wg2.Add(1)
+					go func() {
+						f.mapT()
+						wg2.Done()
+					}()
+					wg2.Add(1)
+					go func() {
+						f.mapPointerKeyT()
+						wg2.Done()
+					}()
+					wg2.Add(1)
+					go func() {
+						f.chanT()
+						wg2.Done()
+					}()
+					wg2.Add(1)
+					go func() {
+						f.interfaceT()
+						wg2.Done()
+					}()
+				}
+				wg2.Wait()
+				wg.Done()
+			}(t)
+		}
+	}
+	wg.Wait()
+}
+
+type modifier struct {
+	name           string
+	t              func()
+	pointerT       func()
+	arrayT         func()
+	sliceT         func()
+	mapT           func()
+	mapPointerKeyT func()
+	chanT          func()
+	interfaceT     func()
+}
+
+func (a modifier) valid() error {
+	switch {
+	case a.name == "":
+		return errors.New("modifier without name")
+	case a.t == nil:
+		return errors.New(a.name + " missing t")
+	case a.pointerT == nil:
+		return errors.New(a.name + " missing pointerT")
+	case a.arrayT == nil:
+		return errors.New(a.name + " missing arrayT")
+	case a.sliceT == nil:
+		return errors.New(a.name + " missing sliceT")
+	case a.mapT == nil:
+		return errors.New(a.name + " missing mapT")
+	case a.mapPointerKeyT == nil:
+		return errors.New(a.name + " missing mapPointerKeyT")
+	case a.chanT == nil:
+		return errors.New(a.name + " missing chanT")
+	case a.interfaceT == nil:
+		return errors.New(a.name + " missing interfaceT")
+	default:
+		return nil
+	}
+}
+
+var types = []modifier{
+	modifier{
+		name: "bool",
+		t: func() {
+			var a bool
+			for i := 0; i < mods; i++ {
+				a = !a
+				runtime.Gosched()
+			}
+		},
+		pointerT: func() {
+			a := func() *bool { return new(bool) }()
+			for i := 0; i < mods; i++ {
+				*a = !*a
+				runtime.Gosched()
+			}
+		},
+		arrayT: func() {
+			a := [length]bool{}
+			for i := 0; i < mods; i++ {
+				for j := 0; j < len(a); j++ {
+					a[j] = !a[j]
+					runtime.Gosched()
+				}
+			}
+		},
+		sliceT: func() {
+			a := make([]bool, length)
+			for i := 0; i < mods; i++ {
+				for j := 0; j < len(a); j++ {
+					a[j] = !a[j]
+					runtime.Gosched()
+				}
+			}
+		},
+		mapT: func() {
+			a := make(map[bool]bool)
+			for i := 0; i < mods; i++ {
+				a[false] = !a[false]
+				a[true] = !a[true]
+				runtime.Gosched()
+			}
+		},
+		mapPointerKeyT: func() {
+			a := make(map[*bool]bool)
+			for i := 0; i < length; i++ {
+				a[new(bool)] = false
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for k, v := range a {
+					a[k] = !v
+					runtime.Gosched()
+				}
+			}
+		},
+		chanT: func() {
+			a := make(chan bool)
+			for i := 0; i < mods; i++ {
+				go func() { a <- false }()
+				<-a
+				runtime.Gosched()
+			}
+		},
+		interfaceT: func() {
+			a := interface{}(bool(false))
+			for i := 0; i < mods; i++ {
+				a = !a.(bool)
+				runtime.Gosched()
+			}
+		},
+	},
+	modifier{
+		name: "uint8",
+		t: func() {
+			var u uint8
+			for i := 0; i < mods; i++ {
+				u++
+				runtime.Gosched()
+			}
+		},
+		pointerT: func() {
+			a := func() *uint8 { return new(uint8) }()
+			for i := 0; i < mods; i++ {
+				*a++
+				runtime.Gosched()
+			}
+		},
+		arrayT: func() {
+			a := [length]uint8{}
+			for i := 0; i < mods; i++ {
+				for j := 0; j < len(a); j++ {
+					a[j]++
+					runtime.Gosched()
+				}
+			}
+		},
+		sliceT: func() {
+			a := make([]uint8, length)
+			for i := 0; i < mods; i++ {
+				for j := 0; j < len(a); j++ {
+					a[j]++
+					runtime.Gosched()
+				}
+			}
+		},
+		mapT: func() {
+			a := make(map[uint8]uint8)
+			for i := 0; i < length; i++ {
+				a[uint8(i)] = uint8(i)
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for k, _ := range a {
+					a[k]++
+				}
+				runtime.Gosched()
+			}
+		},
+		mapPointerKeyT: func() {
+			a := make(map[*uint8]uint8)
+			for i := 0; i < length; i++ {
+				a[new(uint8)] = uint8(i)
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for k, _ := range a {
+					a[k]++
+					runtime.Gosched()
+				}
+			}
+		},
+		chanT: func() {
+			a := make(chan uint8)
+			for i := 0; i < mods; i++ {
+				go func() { a <- uint8(i) }()
+				<-a
+				runtime.Gosched()
+			}
+		},
+		interfaceT: func() {
+			a := interface{}(uint8(0))
+			for i := 0; i < mods; i++ {
+				a = a.(uint8) + 1
+				runtime.Gosched()
+			}
+		},
+	},
+	modifier{
+		name: "uint16",
+		t: func() {
+			var u uint16
+			for i := 0; i < mods; i++ {
+				u++
+				runtime.Gosched()
+			}
+		},
+		pointerT: func() {
+			a := func() *uint16 { return new(uint16) }()
+			for i := 0; i < mods; i++ {
+				*a++
+				runtime.Gosched()
+			}
+		},
+		arrayT: func() {
+			a := [length]uint16{}
+			for i := 0; i < mods; i++ {
+				for j := 0; j < len(a); j++ {
+					a[j]++
+					runtime.Gosched()
+				}
+			}
+		},
+		sliceT: func() {
+			a := make([]uint16, length)
+			for i := 0; i < mods; i++ {
+				for j := 0; j < len(a); j++ {
+					a[j]++
+					runtime.Gosched()
+				}
+			}
+		},
+		mapT: func() {
+			a := make(map[uint16]uint16)
+			for i := 0; i < length; i++ {
+				a[uint16(i)] = uint16(i)
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for k, _ := range a {
+					a[k]++
+				}
+				runtime.Gosched()
+			}
+		},
+		mapPointerKeyT: func() {
+			a := make(map[*uint16]uint16)
+			for i := 0; i < length; i++ {
+				a[new(uint16)] = uint16(i)
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for k, _ := range a {
+					a[k]++
+					runtime.Gosched()
+				}
+			}
+		},
+		chanT: func() {
+			a := make(chan uint16)
+			for i := 0; i < mods; i++ {
+				go func() { a <- uint16(i) }()
+				<-a
+				runtime.Gosched()
+			}
+		},
+		interfaceT: func() {
+			a := interface{}(uint16(0))
+			for i := 0; i < mods; i++ {
+				a = a.(uint16) + 1
+				runtime.Gosched()
+			}
+		},
+	},
+	modifier{
+		name: "uint32",
+		t: func() {
+			var u uint32
+			for i := 0; i < mods; i++ {
+				u++
+				runtime.Gosched()
+			}
+		},
+		pointerT: func() {
+			a := func() *uint32 { return new(uint32) }()
+			for i := 0; i < mods; i++ {
+				*a++
+				runtime.Gosched()
+			}
+		},
+		arrayT: func() {
+			a := [length]uint32{}
+			for i := 0; i < mods; i++ {
+				for j := 0; j < len(a); j++ {
+					a[j]++
+					runtime.Gosched()
+				}
+			}
+		},
+		sliceT: func() {
+			a := make([]uint32, length)
+			for i := 0; i < mods; i++ {
+				for j := 0; j < len(a); j++ {
+					a[j]++
+					runtime.Gosched()
+				}
+			}
+		},
+		mapT: func() {
+			a := make(map[uint32]uint32)
+			for i := 0; i < length; i++ {
+				a[uint32(i)] = uint32(i)
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for k, _ := range a {
+					a[k]++
+				}
+				runtime.Gosched()
+			}
+		},
+		mapPointerKeyT: func() {
+			a := make(map[*uint32]uint32)
+			for i := 0; i < length; i++ {
+				a[new(uint32)] = uint32(i)
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for k, _ := range a {
+					a[k]++
+					runtime.Gosched()
+				}
+			}
+		},
+		chanT: func() {
+			a := make(chan uint32)
+			for i := 0; i < mods; i++ {
+				go func() { a <- uint32(i) }()
+				<-a
+				runtime.Gosched()
+			}
+		},
+		interfaceT: func() {
+			a := interface{}(uint32(0))
+			for i := 0; i < mods; i++ {
+				a = a.(uint32) + 1
+				runtime.Gosched()
+			}
+		},
+	},
+	modifier{
+		name: "uint64",
+		t: func() {
+			var u uint64
+			for i := 0; i < mods; i++ {
+				u++
+				runtime.Gosched()
+			}
+		},
+		pointerT: func() {
+			a := func() *uint64 { return new(uint64) }()
+			for i := 0; i < mods; i++ {
+				*a++
+				runtime.Gosched()
+			}
+		},
+		arrayT: func() {
+			a := [length]uint64{}
+			for i := 0; i < mods; i++ {
+				for j := 0; j < len(a); j++ {
+					a[j]++
+					runtime.Gosched()
+				}
+			}
+		},
+		sliceT: func() {
+			a := make([]uint64, length)
+			for i := 0; i < mods; i++ {
+				for j := 0; j < len(a); j++ {
+					a[j]++
+					runtime.Gosched()
+				}
+			}
+		},
+		mapT: func() {
+			a := make(map[uint64]uint64)
+			for i := 0; i < length; i++ {
+				a[uint64(i)] = uint64(i)
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for k, _ := range a {
+					a[k]++
+				}
+				runtime.Gosched()
+			}
+		},
+		mapPointerKeyT: func() {
+			a := make(map[*uint64]uint64)
+			for i := 0; i < length; i++ {
+				a[new(uint64)] = uint64(i)
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for k, _ := range a {
+					a[k]++
+					runtime.Gosched()
+				}
+			}
+		},
+		chanT: func() {
+			a := make(chan uint64)
+			for i := 0; i < mods; i++ {
+				go func() { a <- uint64(i) }()
+				<-a
+				runtime.Gosched()
+			}
+		},
+		interfaceT: func() {
+			a := interface{}(uint64(0))
+			for i := 0; i < mods; i++ {
+				a = a.(uint64) + 1
+				runtime.Gosched()
+			}
+		},
+	},
+	modifier{
+		name: "int8",
+		t: func() {
+			var u int8
+			for i := 0; i < mods; i++ {
+				u++
+				runtime.Gosched()
+			}
+		},
+		pointerT: func() {
+			a := func() *int8 { return new(int8) }()
+			for i := 0; i < mods; i++ {
+				*a++
+				runtime.Gosched()
+			}
+		},
+		arrayT: func() {
+			a := [length]int8{}
+			for i := 0; i < mods; i++ {
+				for j := 0; j < len(a); j++ {
+					a[j]++
+					runtime.Gosched()
+				}
+			}
+		},
+		sliceT: func() {
+			a := make([]int8, length)
+			for i := 0; i < mods; i++ {
+				for j := 0; j < len(a); j++ {
+					a[j]++
+					runtime.Gosched()
+				}
+			}
+		},
+		mapT: func() {
+			a := make(map[int8]int8)
+			for i := 0; i < length; i++ {
+				a[int8(i)] = int8(i)
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for k, _ := range a {
+					a[k]++
+				}
+				runtime.Gosched()
+			}
+		},
+		mapPointerKeyT: func() {
+			a := make(map[*int8]int8)
+			for i := 0; i < length; i++ {
+				a[new(int8)] = int8(i)
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for k, _ := range a {
+					a[k]++
+					runtime.Gosched()
+				}
+			}
+		},
+		chanT: func() {
+			a := make(chan int8)
+			for i := 0; i < mods; i++ {
+				go func() { a <- int8(i) }()
+				<-a
+				runtime.Gosched()
+			}
+		},
+		interfaceT: func() {
+			a := interface{}(int8(0))
+			for i := 0; i < mods; i++ {
+				a = a.(int8) + 1
+				runtime.Gosched()
+			}
+		},
+	},
+	modifier{
+		name: "int16",
+		t: func() {
+			var u int16
+			for i := 0; i < mods; i++ {
+				u++
+				runtime.Gosched()
+			}
+		},
+		pointerT: func() {
+			a := func() *int16 { return new(int16) }()
+			for i := 0; i < mods; i++ {
+				*a++
+				runtime.Gosched()
+			}
+		},
+		arrayT: func() {
+			a := [length]int16{}
+			for i := 0; i < mods; i++ {
+				for j := 0; j < len(a); j++ {
+					a[j]++
+					runtime.Gosched()
+				}
+			}
+		},
+		sliceT: func() {
+			a := make([]int16, length)
+			for i := 0; i < mods; i++ {
+				for j := 0; j < len(a); j++ {
+					a[j]++
+					runtime.Gosched()
+				}
+			}
+		},
+		mapT: func() {
+			a := make(map[int16]int16)
+			for i := 0; i < length; i++ {
+				a[int16(i)] = int16(i)
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for k, _ := range a {
+					a[k]++
+				}
+				runtime.Gosched()
+			}
+		},
+		mapPointerKeyT: func() {
+			a := make(map[*int16]int16)
+			for i := 0; i < length; i++ {
+				a[new(int16)] = int16(i)
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for k, _ := range a {
+					a[k]++
+					runtime.Gosched()
+				}
+			}
+		},
+		chanT: func() {
+			a := make(chan int16)
+			for i := 0; i < mods; i++ {
+				go func() { a <- int16(i) }()
+				<-a
+				runtime.Gosched()
+			}
+		},
+		interfaceT: func() {
+			a := interface{}(int16(0))
+			for i := 0; i < mods; i++ {
+				a = a.(int16) + 1
+				runtime.Gosched()
+			}
+		},
+	},
+	modifier{
+		name: "int32",
+		t: func() {
+			var u int32
+			for i := 0; i < mods; i++ {
+				u++
+				runtime.Gosched()
+			}
+		},
+		pointerT: func() {
+			a := func() *int32 { return new(int32) }()
+			for i := 0; i < mods; i++ {
+				*a++
+				runtime.Gosched()
+			}
+		},
+		arrayT: func() {
+			a := [length]int32{}
+			for i := 0; i < mods; i++ {
+				for j := 0; j < len(a); j++ {
+					a[j]++
+					runtime.Gosched()
+				}
+			}
+		},
+		sliceT: func() {
+			a := make([]int32, length)
+			for i := 0; i < mods; i++ {
+				for j := 0; j < len(a); j++ {
+					a[j]++
+					runtime.Gosched()
+				}
+			}
+		},
+		mapT: func() {
+			a := make(map[int32]int32)
+			for i := 0; i < length; i++ {
+				a[int32(i)] = int32(i)
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for k, _ := range a {
+					a[k]++
+				}
+				runtime.Gosched()
+			}
+		},
+		mapPointerKeyT: func() {
+			a := make(map[*int32]int32)
+			for i := 0; i < length; i++ {
+				a[new(int32)] = int32(i)
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for k, _ := range a {
+					a[k]++
+					runtime.Gosched()
+				}
+			}
+		},
+		chanT: func() {
+			a := make(chan int32)
+			for i := 0; i < mods; i++ {
+				go func() { a <- int32(i) }()
+				<-a
+				runtime.Gosched()
+			}
+		},
+		interfaceT: func() {
+			a := interface{}(int32(0))
+			for i := 0; i < mods; i++ {
+				a = a.(int32) + 1
+				runtime.Gosched()
+			}
+		},
+	},
+	modifier{
+		name: "int64",
+		t: func() {
+			var u int64
+			for i := 0; i < mods; i++ {
+				u++
+				runtime.Gosched()
+			}
+		},
+		pointerT: func() {
+			a := func() *int64 { return new(int64) }()
+			for i := 0; i < mods; i++ {
+				*a++
+				runtime.Gosched()
+			}
+		},
+		arrayT: func() {
+			a := [length]int64{}
+			for i := 0; i < mods; i++ {
+				for j := 0; j < len(a); j++ {
+					a[j]++
+					runtime.Gosched()
+				}
+			}
+		},
+		sliceT: func() {
+			a := make([]int64, length)
+			for i := 0; i < mods; i++ {
+				for j := 0; j < len(a); j++ {
+					a[j]++
+					runtime.Gosched()
+				}
+			}
+		},
+		mapT: func() {
+			a := make(map[int64]int64)
+			for i := 0; i < length; i++ {
+				a[int64(i)] = int64(i)
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for k, _ := range a {
+					a[k]++
+				}
+				runtime.Gosched()
+			}
+		},
+		mapPointerKeyT: func() {
+			a := make(map[*int64]int64)
+			for i := 0; i < length; i++ {
+				a[new(int64)] = int64(i)
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for k, _ := range a {
+					a[k]++
+					runtime.Gosched()
+				}
+			}
+		},
+		chanT: func() {
+			a := make(chan int64)
+			for i := 0; i < mods; i++ {
+				go func() { a <- int64(i) }()
+				<-a
+				runtime.Gosched()
+			}
+		},
+		interfaceT: func() {
+			a := interface{}(int64(0))
+			for i := 0; i < mods; i++ {
+				a = a.(int64) + 1
+				runtime.Gosched()
+			}
+		},
+	},
+	modifier{
+		name: "float32",
+		t: func() {
+			u := float32(1.01)
+			for i := 0; i < mods; i++ {
+				u *= 1.01
+				runtime.Gosched()
+			}
+		},
+		pointerT: func() {
+			a := func() *float32 { return new(float32) }()
+			*a = 1.01
+			for i := 0; i < mods; i++ {
+				*a *= 1.01
+				runtime.Gosched()
+			}
+		},
+		arrayT: func() {
+			a := [length]float32{}
+			for i := 0; i < length; i++ {
+				a[i] = float32(1.01)
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for j := 0; j < len(a); j++ {
+					a[j] *= 1.01
+					runtime.Gosched()
+				}
+			}
+		},
+		sliceT: func() {
+			a := make([]float32, length)
+			for i := 0; i < length; i++ {
+				a[i] = float32(1.01)
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for j := 0; j < len(a); j++ {
+					a[j] *= 1.01
+					runtime.Gosched()
+				}
+			}
+		},
+		mapT: func() {
+			a := make(map[float32]float32)
+			for i := 0; i < length; i++ {
+				a[float32(i)] = float32(i) + 0.01
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for k, _ := range a {
+					a[k] *= 1.01
+				}
+				runtime.Gosched()
+			}
+		},
+		mapPointerKeyT: func() {
+			a := make(map[*float32]float32)
+			for i := 0; i < length; i++ {
+				a[new(float32)] = float32(i) + 0.01
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for k, _ := range a {
+					a[k] *= 1.01
+					runtime.Gosched()
+				}
+			}
+		},
+		chanT: func() {
+			a := make(chan float32)
+			for i := 0; i < mods; i++ {
+				go func() { a <- float32(i) }()
+				<-a
+				runtime.Gosched()
+			}
+		},
+		interfaceT: func() {
+			a := interface{}(float32(0))
+			for i := 0; i < mods; i++ {
+				a = a.(float32) * 1.01
+				runtime.Gosched()
+			}
+		},
+	},
+	modifier{
+		name: "float64",
+		t: func() {
+			u := float64(1.01)
+			for i := 0; i < mods; i++ {
+				u *= 1.01
+				runtime.Gosched()
+			}
+		},
+		pointerT: func() {
+			a := func() *float64 { return new(float64) }()
+			*a = 1.01
+			for i := 0; i < mods; i++ {
+				*a *= 1.01
+				runtime.Gosched()
+			}
+		},
+		arrayT: func() {
+			a := [length]float64{}
+			for i := 0; i < length; i++ {
+				a[i] = float64(1.01)
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for j := 0; j < len(a); j++ {
+					a[j] *= 1.01
+					runtime.Gosched()
+				}
+			}
+		},
+		sliceT: func() {
+			a := make([]float64, length)
+			for i := 0; i < length; i++ {
+				a[i] = float64(1.01)
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for j := 0; j < len(a); j++ {
+					a[j] *= 1.01
+					runtime.Gosched()
+				}
+			}
+		},
+		mapT: func() {
+			a := make(map[float64]float64)
+			for i := 0; i < length; i++ {
+				a[float64(i)] = float64(i) + 0.01
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for k, _ := range a {
+					a[k] *= 1.01
+				}
+				runtime.Gosched()
+			}
+		},
+		mapPointerKeyT: func() {
+			a := make(map[*float64]float64)
+			for i := 0; i < length; i++ {
+				a[new(float64)] = float64(i) + 0.01
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for k, _ := range a {
+					a[k] *= 1.01
+					runtime.Gosched()
+				}
+			}
+		},
+		chanT: func() {
+			a := make(chan float64)
+			for i := 0; i < mods; i++ {
+				go func() { a <- float64(i) }()
+				<-a
+				runtime.Gosched()
+			}
+		},
+		interfaceT: func() {
+			a := interface{}(float64(0))
+			for i := 0; i < mods; i++ {
+				a = a.(float64) * 1.01
+				runtime.Gosched()
+			}
+		},
+	},
+	modifier{
+		name: "complex64",
+		t: func() {
+			c := complex64(complex(float32(1.01), float32(1.01)))
+			for i := 0; i < mods; i++ {
+				c = complex(real(c)*1.01, imag(c)*1.01)
+				runtime.Gosched()
+			}
+		},
+		pointerT: func() {
+			a := func() *complex64 { return new(complex64) }()
+			*a = complex64(complex(float32(1.01), float32(1.01)))
+			for i := 0; i < mods; i++ {
+				*a *= complex(real(*a)*1.01, imag(*a)*1.01)
+				runtime.Gosched()
+			}
+		},
+		arrayT: func() {
+			a := [length]complex64{}
+			for i := 0; i < length; i++ {
+				a[i] = complex64(complex(float32(1.01), float32(1.01)))
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for j := 0; j < len(a); j++ {
+					a[j] *= complex(real(a[j])*1.01, imag(a[j])*1.01)
+					runtime.Gosched()
+				}
+			}
+		},
+		sliceT: func() {
+			a := make([]complex64, length)
+			for i := 0; i < length; i++ {
+				a[i] = complex64(complex(float32(1.01), float32(1.01)))
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for j := 0; j < len(a); j++ {
+					a[j] *= complex(real(a[j])*1.01, imag(a[j])*1.01)
+					runtime.Gosched()
+				}
+			}
+		},
+		mapT: func() {
+			a := make(map[complex64]complex64)
+			for i := 0; i < length; i++ {
+				a[complex64(complex(float32(i), float32(i)))] = complex64(complex(float32(i), float32(i))) + 0.01
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for k, _ := range a {
+					a[k] *= complex(real(a[k])*1.01, imag(a[k])*1.01)
+				}
+				runtime.Gosched()
+			}
+		},
+		mapPointerKeyT: func() {
+			a := make(map[*complex64]complex64)
+			for i := 0; i < length; i++ {
+				a[new(complex64)] = complex64(complex(float32(i), float32(i))) + 0.01
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for k, _ := range a {
+					a[k] *= complex(real(a[k])*1.01, imag(a[k])*1.01)
+					runtime.Gosched()
+				}
+			}
+		},
+		chanT: func() {
+			a := make(chan complex64)
+			for i := 0; i < mods; i++ {
+				go func() { a <- complex64(complex(float32(i), float32(i))) }()
+				<-a
+				runtime.Gosched()
+			}
+		},
+		interfaceT: func() {
+			a := interface{}(complex64(complex(float32(1.01), float32(1.01))))
+			for i := 0; i < mods; i++ {
+				a = a.(complex64) * complex(real(a.(complex64))*1.01, imag(a.(complex64))*1.01)
+				runtime.Gosched()
+			}
+		},
+	},
+	modifier{
+		name: "complex128",
+		t: func() {
+			c := complex128(complex(float64(1.01), float64(1.01)))
+			for i := 0; i < mods; i++ {
+				c = complex(real(c)*1.01, imag(c)*1.01)
+				runtime.Gosched()
+			}
+		},
+		pointerT: func() {
+			a := func() *complex128 { return new(complex128) }()
+			*a = complex128(complex(float64(1.01), float64(1.01)))
+			for i := 0; i < mods; i++ {
+				*a *= complex(real(*a)*1.01, imag(*a)*1.01)
+				runtime.Gosched()
+			}
+		},
+		arrayT: func() {
+			a := [length]complex128{}
+			for i := 0; i < length; i++ {
+				a[i] = complex128(complex(float64(1.01), float64(1.01)))
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for j := 0; j < len(a); j++ {
+					a[j] *= complex(real(a[j])*1.01, imag(a[j])*1.01)
+					runtime.Gosched()
+				}
+			}
+		},
+		sliceT: func() {
+			a := make([]complex128, length)
+			for i := 0; i < length; i++ {
+				a[i] = complex128(complex(float64(1.01), float64(1.01)))
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for j := 0; j < len(a); j++ {
+					a[j] *= complex(real(a[j])*1.01, imag(a[j])*1.01)
+					runtime.Gosched()
+				}
+			}
+		},
+		mapT: func() {
+			a := make(map[complex128]complex128)
+			for i := 0; i < length; i++ {
+				a[complex128(complex(float64(i), float64(i)))] = complex128(complex(float64(i), float64(i))) + 0.01
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for k, _ := range a {
+					a[k] *= complex(real(a[k])*1.01, imag(a[k])*1.01)
+				}
+				runtime.Gosched()
+			}
+		},
+		mapPointerKeyT: func() {
+			a := make(map[*complex128]complex128)
+			for i := 0; i < length; i++ {
+				a[new(complex128)] = complex128(complex(float64(i), float64(i))) + 0.01
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for k, _ := range a {
+					a[k] *= complex(real(a[k])*1.01, imag(a[k])*1.01)
+					runtime.Gosched()
+				}
+			}
+		},
+		chanT: func() {
+			a := make(chan complex128)
+			for i := 0; i < mods; i++ {
+				go func() { a <- complex128(complex(float64(i), float64(i))) }()
+				<-a
+				runtime.Gosched()
+			}
+		},
+		interfaceT: func() {
+			a := interface{}(complex128(complex(float64(1.01), float64(1.01))))
+			for i := 0; i < mods; i++ {
+				a = a.(complex128) * complex(real(a.(complex128))*1.01, imag(a.(complex128))*1.01)
+				runtime.Gosched()
+			}
+		},
+	},
+	modifier{
+		name: "byte",
+		t: func() {
+			var a byte
+			for i := 0; i < mods; i++ {
+				a++
+				runtime.Gosched()
+			}
+		},
+		pointerT: func() {
+			a := func() *byte { return new(byte) }()
+			for i := 0; i < mods; i++ {
+				*a++
+				runtime.Gosched()
+			}
+		},
+		arrayT: func() {
+			a := [length]byte{}
+			for i := 0; i < mods; i++ {
+				for j := 0; j < len(a); j++ {
+					a[j]++
+					runtime.Gosched()
+				}
+			}
+		},
+		sliceT: func() {
+			a := make([]byte, length)
+			for i := 0; i < mods; i++ {
+				for j := 0; j < len(a); j++ {
+					a[j]++
+					runtime.Gosched()
+				}
+			}
+		},
+		mapT: func() {
+			a := make(map[byte]byte)
+			for i := 0; i < length; i++ {
+				a[byte(i)] = byte(i)
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for k, _ := range a {
+					a[k]++
+				}
+				runtime.Gosched()
+			}
+		},
+		mapPointerKeyT: func() {
+			a := make(map[*byte]byte)
+			for i := 0; i < length; i++ {
+				a[new(byte)] = byte(i)
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for k, _ := range a {
+					a[k]++
+					runtime.Gosched()
+				}
+			}
+		},
+		chanT: func() {
+			a := make(chan byte)
+			for i := 0; i < mods; i++ {
+				go func() { a <- byte(i) }()
+				<-a
+				runtime.Gosched()
+			}
+		},
+		interfaceT: func() {
+			a := interface{}(byte(0))
+			for i := 0; i < mods; i++ {
+				a = a.(byte) + 1
+				runtime.Gosched()
+			}
+		},
+	},
+	modifier{
+		name: "rune",
+		t: func() {
+			var a rune
+			for i := 0; i < mods; i++ {
+				a++
+				runtime.Gosched()
+			}
+		},
+		pointerT: func() {
+			a := func() *rune { return new(rune) }()
+			for i := 0; i < mods; i++ {
+				*a++
+				runtime.Gosched()
+			}
+		},
+		arrayT: func() {
+			a := [length]rune{}
+			for i := 0; i < mods; i++ {
+				for j := 0; j < len(a); j++ {
+					a[j]++
+					runtime.Gosched()
+				}
+			}
+		},
+		sliceT: func() {
+			a := make([]rune, length)
+			for i := 0; i < mods; i++ {
+				for j := 0; j < len(a); j++ {
+					a[j]++
+					runtime.Gosched()
+				}
+			}
+		},
+		mapT: func() {
+			a := make(map[rune]rune)
+			for i := 0; i < length; i++ {
+				a[rune(i)] = rune(i)
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for k, _ := range a {
+					a[k]++
+				}
+				runtime.Gosched()
+			}
+		},
+		mapPointerKeyT: func() {
+			a := make(map[*rune]rune)
+			for i := 0; i < length; i++ {
+				a[new(rune)] = rune(i)
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for k, _ := range a {
+					a[k]++
+					runtime.Gosched()
+				}
+			}
+		},
+		chanT: func() {
+			a := make(chan rune)
+			for i := 0; i < mods; i++ {
+				go func() { a <- rune(i) }()
+				<-a
+				runtime.Gosched()
+			}
+		},
+		interfaceT: func() {
+			a := interface{}(rune(0))
+			for i := 0; i < mods; i++ {
+				a = a.(rune) + 1
+				runtime.Gosched()
+			}
+		},
+	},
+	modifier{
+		name: "uint",
+		t: func() {
+			var a uint
+			for i := 0; i < mods; i++ {
+				a++
+				runtime.Gosched()
+			}
+		},
+		pointerT: func() {
+			a := func() *uint { return new(uint) }()
+			for i := 0; i < mods; i++ {
+				*a++
+				runtime.Gosched()
+			}
+		},
+		arrayT: func() {
+			a := [length]uint{}
+			for i := 0; i < mods; i++ {
+				for j := 0; j < len(a); j++ {
+					a[j]++
+					runtime.Gosched()
+				}
+			}
+		},
+		sliceT: func() {
+			a := make([]uint, length)
+			for i := 0; i < mods; i++ {
+				for j := 0; j < len(a); j++ {
+					a[j]++
+					runtime.Gosched()
+				}
+			}
+		},
+		mapT: func() {
+			a := make(map[uint]uint)
+			for i := 0; i < length; i++ {
+				a[uint(i)] = uint(i)
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for k, _ := range a {
+					a[k]++
+				}
+				runtime.Gosched()
+			}
+		},
+		mapPointerKeyT: func() {
+			a := make(map[*uint]uint)
+			for i := 0; i < length; i++ {
+				a[new(uint)] = uint(i)
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for k, _ := range a {
+					a[k]++
+					runtime.Gosched()
+				}
+			}
+		},
+		chanT: func() {
+			a := make(chan uint)
+			for i := 0; i < mods; i++ {
+				go func() { a <- uint(i) }()
+				<-a
+				runtime.Gosched()
+			}
+		},
+		interfaceT: func() {
+			a := interface{}(uint(0))
+			for i := 0; i < mods; i++ {
+				a = a.(uint) + 1
+				runtime.Gosched()
+			}
+		},
+	},
+	modifier{
+		name: "int",
+		t: func() {
+			var a int
+			for i := 0; i < mods; i++ {
+				a++
+				runtime.Gosched()
+			}
+		},
+		pointerT: func() {
+			a := func() *int { return new(int) }()
+			for i := 0; i < mods; i++ {
+				*a++
+				runtime.Gosched()
+			}
+		},
+		arrayT: func() {
+			a := [length]int{}
+			for i := 0; i < mods; i++ {
+				for j := 0; j < len(a); j++ {
+					a[j]++
+					runtime.Gosched()
+				}
+			}
+		},
+		sliceT: func() {
+			a := make([]int, length)
+			for i := 0; i < mods; i++ {
+				for j := 0; j < len(a); j++ {
+					a[j]++
+					runtime.Gosched()
+				}
+			}
+		},
+		mapT: func() {
+			a := make(map[int]int)
+			for i := 0; i < length; i++ {
+				a[int(i)] = int(i)
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for k, _ := range a {
+					a[k]++
+				}
+				runtime.Gosched()
+			}
+		},
+		mapPointerKeyT: func() {
+			a := make(map[*int]int)
+			for i := 0; i < length; i++ {
+				a[new(int)] = int(i)
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for k, _ := range a {
+					a[k]++
+					runtime.Gosched()
+				}
+			}
+		},
+		chanT: func() {
+			a := make(chan int)
+			for i := 0; i < mods; i++ {
+				go func() { a <- int(i) }()
+				<-a
+				runtime.Gosched()
+			}
+		},
+		interfaceT: func() {
+			a := interface{}(int(0))
+			for i := 0; i < mods; i++ {
+				a = a.(int) + 1
+				runtime.Gosched()
+			}
+		},
+	},
+	modifier{
+		name: "uintptr",
+		t: func() {
+			var a uintptr
+			for i := 0; i < mods; i++ {
+				a++
+				runtime.Gosched()
+			}
+		},
+		pointerT: func() {
+			a := func() *uintptr { return new(uintptr) }()
+			for i := 0; i < mods; i++ {
+				*a++
+				runtime.Gosched()
+			}
+		},
+		arrayT: func() {
+			a := [length]uintptr{}
+			for i := 0; i < mods; i++ {
+				for j := 0; j < len(a); j++ {
+					a[j]++
+					runtime.Gosched()
+				}
+			}
+		},
+		sliceT: func() {
+			a := make([]uintptr, length)
+			for i := 0; i < mods; i++ {
+				for j := 0; j < len(a); j++ {
+					a[j]++
+					runtime.Gosched()
+				}
+			}
+		},
+		mapT: func() {
+			a := make(map[uintptr]uintptr)
+			for i := 0; i < length; i++ {
+				a[uintptr(i)] = uintptr(i)
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for k, _ := range a {
+					a[k]++
+				}
+				runtime.Gosched()
+			}
+		},
+		mapPointerKeyT: func() {
+			a := make(map[*uintptr]uintptr)
+			for i := 0; i < length; i++ {
+				a[new(uintptr)] = uintptr(i)
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for k, _ := range a {
+					a[k]++
+					runtime.Gosched()
+				}
+			}
+		},
+		chanT: func() {
+			a := make(chan uintptr)
+			for i := 0; i < mods; i++ {
+				go func() { a <- uintptr(i) }()
+				<-a
+				runtime.Gosched()
+			}
+		},
+		interfaceT: func() {
+			a := interface{}(uintptr(0))
+			for i := 0; i < mods; i++ {
+				a = a.(uintptr) + 1
+				runtime.Gosched()
+			}
+		},
+	},
+	modifier{
+		name: "string",
+		t: func() {
+			var s string
+			f := func(a string) string { return a }
+			for i := 0; i < mods; i++ {
+				s = str(i)
+				s = f(s)
+			}
+		},
+		pointerT: func() {
+			a := func() *string { return new(string) }()
+			for i := 0; i < mods; i++ {
+				*a = str(i)
+				runtime.Gosched()
+			}
+		},
+		arrayT: func() {
+			a := [length]string{}
+			for i := 0; i < mods; i++ {
+				for j := 0; j < len(a); j++ {
+					a[j] = str(i)
+					runtime.Gosched()
+				}
+			}
+		},
+		sliceT: func() {
+			a := make([]string, length)
+			for i := 0; i < mods; i++ {
+				for j := 0; j < len(a); j++ {
+					a[j] = str(i)
+					runtime.Gosched()
+				}
+			}
+		},
+		mapT: func() {
+			a := make(map[string]string)
+			for i := 0; i < length; i++ {
+				a[string(i)] = str(i)
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for k, _ := range a {
+					a[k] = str(i)
+				}
+				runtime.Gosched()
+			}
+		},
+		mapPointerKeyT: func() {
+			a := make(map[*string]string)
+			for i := 0; i < length; i++ {
+				a[new(string)] = str(i)
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for k, _ := range a {
+					a[k] = str(i)
+					runtime.Gosched()
+				}
+			}
+		},
+		chanT: func() {
+			a := make(chan string)
+			for i := 0; i < mods; i++ {
+				go func() { a <- str(i) }()
+				<-a
+				runtime.Gosched()
+			}
+		},
+		interfaceT: func() {
+			a := interface{}(str(0))
+			f := func(a string) string { return a }
+			for i := 0; i < mods; i++ {
+				a = str(i)
+				a = f(a.(string))
+				runtime.Gosched()
+			}
+		},
+	},
+	modifier{
+		name: "structT",
+		t: func() {
+			s := newStructT()
+			for i := 0; i < mods; i++ {
+				s.u8++
+				s.u16++
+				s.u32++
+				s.u64++
+				s.i8++
+				s.i16++
+				s.i32++
+				s.i64++
+				s.f32 *= 1.01
+				s.f64 *= 1.01
+				s.c64 = complex(real(s.c64)*1.01, imag(s.c64)*1.01)
+				s.c128 = complex(real(s.c128)*1.01, imag(s.c128)*1.01)
+				s.b++
+				s.r++
+				s.u++
+				s.in++
+				s.uip++
+				s.s = str(i)
+				runtime.Gosched()
+			}
+		},
+		pointerT: func() {
+			s := func() *structT {
+				t := newStructT()
+				return &t
+			}()
+			for i := 0; i < mods; i++ {
+				s.u8++
+				s.u16++
+				s.u32++
+				s.u64++
+				s.i8++
+				s.i16++
+				s.i32++
+				s.i64++
+				s.f32 *= 1.01
+				s.f64 *= 1.01
+				s.c64 = complex(real(s.c64)*1.01, imag(s.c64)*1.01)
+				s.c128 = complex(real(s.c128)*1.01, imag(s.c128)*1.01)
+				s.b++
+				s.r++
+				s.u++
+				s.in++
+				s.uip++
+				s.s = str(i)
+				runtime.Gosched()
+			}
+		},
+		arrayT: func() {
+			a := [length]structT{}
+			for i := 0; i < len(a); i++ {
+				a[i] = newStructT()
+			}
+			for i := 0; i < mods; i++ {
+				for j := 0; j < len(a); j++ {
+					a[j].u8++
+					a[j].u16++
+					a[j].u32++
+					a[j].u64++
+					a[j].i8++
+					a[j].i16++
+					a[j].i32++
+					a[j].i64++
+					a[j].f32 *= 1.01
+					a[j].f64 *= 1.01
+					a[j].c64 = complex(real(a[j].c64)*1.01, imag(a[j].c64)*1.01)
+					a[j].c128 = complex(real(a[j].c128)*1.01, imag(a[j].c128)*1.01)
+					a[j].b++
+					a[j].r++
+					a[j].u++
+					a[j].in++
+					a[j].uip++
+					a[j].s = str(i)
+					runtime.Gosched()
+				}
+			}
+		},
+		sliceT: func() {
+			a := make([]structT, length)
+			for i := 0; i < len(a); i++ {
+				a[i] = newStructT()
+			}
+			for i := 0; i < mods; i++ {
+				for j := 0; j < len(a); j++ {
+					a[j].u8++
+					a[j].u16++
+					a[j].u32++
+					a[j].u64++
+					a[j].i8++
+					a[j].i16++
+					a[j].i32++
+					a[j].i64++
+					a[j].f32 *= 1.01
+					a[j].f64 *= 1.01
+					a[j].c64 = complex(real(a[j].c64)*1.01, imag(a[j].c64)*1.01)
+					a[j].c128 = complex(real(a[j].c128)*1.01, imag(a[j].c128)*1.01)
+					a[j].b++
+					a[j].r++
+					a[j].u++
+					a[j].in++
+					a[j].uip++
+					a[j].s = str(i)
+					runtime.Gosched()
+				}
+			}
+		},
+		mapT: func() {
+			a := make(map[structT]structT)
+			for i := 0; i < length; i++ {
+				m := newStructT()
+				m.in = i
+				a[m] = newStructT()
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for j, _ := range a {
+					m := a[j]
+					m.u8++
+					m.u16++
+					m.u32++
+					m.u64++
+					m.i8++
+					m.i16++
+					m.i32++
+					m.i64++
+					m.f32 *= 1.01
+					m.f64 *= 1.01
+					m.c64 = complex(real(a[j].c64)*1.01, imag(a[j].c64)*1.01)
+					m.c128 = complex(real(a[j].c128)*1.01, imag(a[j].c128)*1.01)
+					m.b++
+					m.r++
+					m.u++
+					m.in++
+					m.uip++
+					m.s = str(i)
+					a[j] = m
+					runtime.Gosched()
+				}
+				runtime.Gosched()
+			}
+		},
+		mapPointerKeyT: func() {
+			a := make(map[*structT]structT)
+			f := func() *structT {
+				m := newStructT()
+				return &m
+			}
+			for i := 0; i < length; i++ {
+				m := f()
+				m.in = i
+				a[m] = newStructT()
+				runtime.Gosched()
+			}
+			for i := 0; i < mods; i++ {
+				for j, _ := range a {
+					m := a[j]
+					m.u8++
+					m.u16++
+					m.u32++
+					m.u64++
+					m.i8++
+					m.i16++
+					m.i32++
+					m.i64++
+					m.f32 *= 1.01
+					m.f64 *= 1.01
+					m.c64 = complex(real(a[j].c64)*1.01, imag(a[j].c64)*1.01)
+					m.c128 = complex(real(a[j].c128)*1.01, imag(a[j].c128)*1.01)
+					m.b++
+					m.r++
+					m.u++
+					m.in++
+					m.uip++
+					m.s = str(i)
+					a[j] = m
+					runtime.Gosched()
+				}
+				runtime.Gosched()
+			}
+		},
+		chanT: func() {
+			a := make(chan structT)
+			for i := 0; i < mods; i++ {
+				go func() { a <- newStructT() }()
+				<-a
+				runtime.Gosched()
+			}
+		},
+		interfaceT: func() {
+			a := interface{}(newStructT())
+			for i := 0; i < mods; i++ {
+				a = a.(structT)
+				runtime.Gosched()
+			}
+		},
+	},
+}
+
+type structT struct {
+	u8   uint8
+	u16  uint16
+	u32  uint32
+	u64  uint64
+	i8   int8
+	i16  int16
+	i32  int32
+	i64  int64
+	f32  float32
+	f64  float64
+	c64  complex64
+	c128 complex128
+	b    byte
+	r    rune
+	u    uint
+	in   int
+	uip  uintptr
+	s    string
+}
+
+func newStructT() structT {
+	return structT{
+		f32:  1.01,
+		f64:  1.01,
+		c64:  complex(float32(1.01), float32(1.01)),
+		c128: complex(float64(1.01), float64(1.01)),
+	}
+}
+
+func str(in int) string {
+	switch in % 3 {
+	case 0:
+		return "Hello"
+	case 1:
+		return "world"
+	case 2:
+		return "!"
+	}
+	return "?"
+}