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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-16 19:23:18 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-16 19:23:18 +0000
commit43a123c1ae6613b3efeed291fa552ecd909d3acf (patch)
treefd92518b7024bc74031f78a1cf9e454b65e73665 /src/runtime/iface_test.go
parentInitial commit. (diff)
downloadgolang-1.20-43a123c1ae6613b3efeed291fa552ecd909d3acf.tar.xz
golang-1.20-43a123c1ae6613b3efeed291fa552ecd909d3acf.zip
Adding upstream version 1.20.14.upstream/1.20.14upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/runtime/iface_test.go')
-rw-r--r--src/runtime/iface_test.go439
1 files changed, 439 insertions, 0 deletions
diff --git a/src/runtime/iface_test.go b/src/runtime/iface_test.go
new file mode 100644
index 0000000..06f6eeb
--- /dev/null
+++ b/src/runtime/iface_test.go
@@ -0,0 +1,439 @@
+// Copyright 2012 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 runtime_test
+
+import (
+ "runtime"
+ "testing"
+)
+
+type I1 interface {
+ Method1()
+}
+
+type I2 interface {
+ Method1()
+ Method2()
+}
+
+type TS uint16
+type TM uintptr
+type TL [2]uintptr
+
+func (TS) Method1() {}
+func (TS) Method2() {}
+func (TM) Method1() {}
+func (TM) Method2() {}
+func (TL) Method1() {}
+func (TL) Method2() {}
+
+type T8 uint8
+type T16 uint16
+type T32 uint32
+type T64 uint64
+type Tstr string
+type Tslice []byte
+
+func (T8) Method1() {}
+func (T16) Method1() {}
+func (T32) Method1() {}
+func (T64) Method1() {}
+func (Tstr) Method1() {}
+func (Tslice) Method1() {}
+
+var (
+ e any
+ e_ any
+ i1 I1
+ i2 I2
+ ts TS
+ tm TM
+ tl TL
+ ok bool
+)
+
+// Issue 9370
+func TestCmpIfaceConcreteAlloc(t *testing.T) {
+ if runtime.Compiler != "gc" {
+ t.Skip("skipping on non-gc compiler")
+ }
+
+ n := testing.AllocsPerRun(1, func() {
+ _ = e == ts
+ _ = i1 == ts
+ _ = e == 1
+ })
+
+ if n > 0 {
+ t.Fatalf("iface cmp allocs=%v; want 0", n)
+ }
+}
+
+func BenchmarkEqEfaceConcrete(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ _ = e == ts
+ }
+}
+
+func BenchmarkEqIfaceConcrete(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ _ = i1 == ts
+ }
+}
+
+func BenchmarkNeEfaceConcrete(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ _ = e != ts
+ }
+}
+
+func BenchmarkNeIfaceConcrete(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ _ = i1 != ts
+ }
+}
+
+func BenchmarkConvT2EByteSized(b *testing.B) {
+ b.Run("bool", func(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ e = yes
+ }
+ })
+ b.Run("uint8", func(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ e = eight8
+ }
+ })
+}
+
+func BenchmarkConvT2ESmall(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ e = ts
+ }
+}
+
+func BenchmarkConvT2EUintptr(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ e = tm
+ }
+}
+
+func BenchmarkConvT2ELarge(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ e = tl
+ }
+}
+
+func BenchmarkConvT2ISmall(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ i1 = ts
+ }
+}
+
+func BenchmarkConvT2IUintptr(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ i1 = tm
+ }
+}
+
+func BenchmarkConvT2ILarge(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ i1 = tl
+ }
+}
+
+func BenchmarkConvI2E(b *testing.B) {
+ i2 = tm
+ for i := 0; i < b.N; i++ {
+ e = i2
+ }
+}
+
+func BenchmarkConvI2I(b *testing.B) {
+ i2 = tm
+ for i := 0; i < b.N; i++ {
+ i1 = i2
+ }
+}
+
+func BenchmarkAssertE2T(b *testing.B) {
+ e = tm
+ for i := 0; i < b.N; i++ {
+ tm = e.(TM)
+ }
+}
+
+func BenchmarkAssertE2TLarge(b *testing.B) {
+ e = tl
+ for i := 0; i < b.N; i++ {
+ tl = e.(TL)
+ }
+}
+
+func BenchmarkAssertE2I(b *testing.B) {
+ e = tm
+ for i := 0; i < b.N; i++ {
+ i1 = e.(I1)
+ }
+}
+
+func BenchmarkAssertI2T(b *testing.B) {
+ i1 = tm
+ for i := 0; i < b.N; i++ {
+ tm = i1.(TM)
+ }
+}
+
+func BenchmarkAssertI2I(b *testing.B) {
+ i1 = tm
+ for i := 0; i < b.N; i++ {
+ i2 = i1.(I2)
+ }
+}
+
+func BenchmarkAssertI2E(b *testing.B) {
+ i1 = tm
+ for i := 0; i < b.N; i++ {
+ e = i1.(any)
+ }
+}
+
+func BenchmarkAssertE2E(b *testing.B) {
+ e = tm
+ for i := 0; i < b.N; i++ {
+ e_ = e
+ }
+}
+
+func BenchmarkAssertE2T2(b *testing.B) {
+ e = tm
+ for i := 0; i < b.N; i++ {
+ tm, ok = e.(TM)
+ }
+}
+
+func BenchmarkAssertE2T2Blank(b *testing.B) {
+ e = tm
+ for i := 0; i < b.N; i++ {
+ _, ok = e.(TM)
+ }
+}
+
+func BenchmarkAssertI2E2(b *testing.B) {
+ i1 = tm
+ for i := 0; i < b.N; i++ {
+ e, ok = i1.(any)
+ }
+}
+
+func BenchmarkAssertI2E2Blank(b *testing.B) {
+ i1 = tm
+ for i := 0; i < b.N; i++ {
+ _, ok = i1.(any)
+ }
+}
+
+func BenchmarkAssertE2E2(b *testing.B) {
+ e = tm
+ for i := 0; i < b.N; i++ {
+ e_, ok = e.(any)
+ }
+}
+
+func BenchmarkAssertE2E2Blank(b *testing.B) {
+ e = tm
+ for i := 0; i < b.N; i++ {
+ _, ok = e.(any)
+ }
+}
+
+func TestNonEscapingConvT2E(t *testing.T) {
+ m := make(map[any]bool)
+ m[42] = true
+ if !m[42] {
+ t.Fatalf("42 is not present in the map")
+ }
+ if m[0] {
+ t.Fatalf("0 is present in the map")
+ }
+
+ n := testing.AllocsPerRun(1000, func() {
+ if m[0] {
+ t.Fatalf("0 is present in the map")
+ }
+ })
+ if n != 0 {
+ t.Fatalf("want 0 allocs, got %v", n)
+ }
+}
+
+func TestNonEscapingConvT2I(t *testing.T) {
+ m := make(map[I1]bool)
+ m[TM(42)] = true
+ if !m[TM(42)] {
+ t.Fatalf("42 is not present in the map")
+ }
+ if m[TM(0)] {
+ t.Fatalf("0 is present in the map")
+ }
+
+ n := testing.AllocsPerRun(1000, func() {
+ if m[TM(0)] {
+ t.Fatalf("0 is present in the map")
+ }
+ })
+ if n != 0 {
+ t.Fatalf("want 0 allocs, got %v", n)
+ }
+}
+
+func TestZeroConvT2x(t *testing.T) {
+ tests := []struct {
+ name string
+ fn func()
+ }{
+ {name: "E8", fn: func() { e = eight8 }}, // any byte-sized value does not allocate
+ {name: "E16", fn: func() { e = zero16 }}, // zero values do not allocate
+ {name: "E32", fn: func() { e = zero32 }},
+ {name: "E64", fn: func() { e = zero64 }},
+ {name: "Estr", fn: func() { e = zerostr }},
+ {name: "Eslice", fn: func() { e = zeroslice }},
+ {name: "Econstflt", fn: func() { e = 99.0 }}, // constants do not allocate
+ {name: "Econststr", fn: func() { e = "change" }},
+ {name: "I8", fn: func() { i1 = eight8I }},
+ {name: "I16", fn: func() { i1 = zero16I }},
+ {name: "I32", fn: func() { i1 = zero32I }},
+ {name: "I64", fn: func() { i1 = zero64I }},
+ {name: "Istr", fn: func() { i1 = zerostrI }},
+ {name: "Islice", fn: func() { i1 = zerosliceI }},
+ }
+
+ for _, test := range tests {
+ t.Run(test.name, func(t *testing.T) {
+ n := testing.AllocsPerRun(1000, test.fn)
+ if n != 0 {
+ t.Errorf("want zero allocs, got %v", n)
+ }
+ })
+ }
+}
+
+var (
+ eight8 uint8 = 8
+ eight8I T8 = 8
+ yes bool = true
+
+ zero16 uint16 = 0
+ zero16I T16 = 0
+ one16 uint16 = 1
+ thousand16 uint16 = 1000
+
+ zero32 uint32 = 0
+ zero32I T32 = 0
+ one32 uint32 = 1
+ thousand32 uint32 = 1000
+
+ zero64 uint64 = 0
+ zero64I T64 = 0
+ one64 uint64 = 1
+ thousand64 uint64 = 1000
+
+ zerostr string = ""
+ zerostrI Tstr = ""
+ nzstr string = "abc"
+
+ zeroslice []byte = nil
+ zerosliceI Tslice = nil
+ nzslice []byte = []byte("abc")
+
+ zerobig [512]byte
+ nzbig [512]byte = [512]byte{511: 1}
+)
+
+func BenchmarkConvT2Ezero(b *testing.B) {
+ b.Run("zero", func(b *testing.B) {
+ b.Run("16", func(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ e = zero16
+ }
+ })
+ b.Run("32", func(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ e = zero32
+ }
+ })
+ b.Run("64", func(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ e = zero64
+ }
+ })
+ b.Run("str", func(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ e = zerostr
+ }
+ })
+ b.Run("slice", func(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ e = zeroslice
+ }
+ })
+ b.Run("big", func(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ e = zerobig
+ }
+ })
+ })
+ b.Run("nonzero", func(b *testing.B) {
+ b.Run("str", func(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ e = nzstr
+ }
+ })
+ b.Run("slice", func(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ e = nzslice
+ }
+ })
+ b.Run("big", func(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ e = nzbig
+ }
+ })
+ })
+ b.Run("smallint", func(b *testing.B) {
+ b.Run("16", func(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ e = one16
+ }
+ })
+ b.Run("32", func(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ e = one32
+ }
+ })
+ b.Run("64", func(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ e = one64
+ }
+ })
+ })
+ b.Run("largeint", func(b *testing.B) {
+ b.Run("16", func(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ e = thousand16
+ }
+ })
+ b.Run("32", func(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ e = thousand32
+ }
+ })
+ b.Run("64", func(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ e = thousand64
+ }
+ })
+ })
+}