diff options
Diffstat (limited to 'gcc-4.9/gcc/testsuite/go.test/test/escape2.go')
| -rw-r--r-- | gcc-4.9/gcc/testsuite/go.test/test/escape2.go | 1359 |
1 files changed, 1359 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/testsuite/go.test/test/escape2.go b/gcc-4.9/gcc/testsuite/go.test/test/escape2.go new file mode 100644 index 000000000..be89c2d84 --- /dev/null +++ b/gcc-4.9/gcc/testsuite/go.test/test/escape2.go @@ -0,0 +1,1359 @@ +// errorcheck -0 -m -l + +// Copyright 2010 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, using compiler diagnostic flags, that the escape analysis is working. +// Compiles but does not run. Inlining is disabled. + +package foo + +import ( + "fmt" + "unsafe" +) + +var gxx *int + +func foo1(x int) { // ERROR "moved to heap: x" + gxx = &x // ERROR "&x escapes to heap" +} + +func foo2(yy *int) { // ERROR "leaking param: yy" + gxx = yy +} + +func foo3(x int) *int { // ERROR "moved to heap: x" + return &x // ERROR "&x escapes to heap" +} + +type T *T + +func foo3b(t T) { // ERROR "leaking param: t" + *t = t +} + +// xx isn't going anywhere, so use of yy is ok +func foo4(xx, yy *int) { // ERROR "xx does not escape" "yy does not escape" + xx = yy +} + +// xx isn't going anywhere, so taking address of yy is ok +func foo5(xx **int, yy *int) { // ERROR "xx does not escape" "yy does not escape" + xx = &yy // ERROR "&yy does not escape" +} + +func foo6(xx **int, yy *int) { // ERROR "xx does not escape" "leaking param: yy" + *xx = yy +} + +func foo7(xx **int, yy *int) { // ERROR "xx does not escape" "yy does not escape" + **xx = *yy +} + +func foo8(xx, yy *int) int { // ERROR "xx does not escape" "yy does not escape" + xx = yy + return *xx +} + +func foo9(xx, yy *int) *int { // ERROR "leaking param: xx" "leaking param: yy" + xx = yy + return xx +} + +func foo10(xx, yy *int) { // ERROR "xx does not escape" "yy does not escape" + *xx = *yy +} + +func foo11() int { + x, y := 0, 42 + xx := &x // ERROR "&x does not escape" + yy := &y // ERROR "&y does not escape" + *xx = *yy + return x +} + +var xxx **int + +func foo12(yyy **int) { // ERROR "leaking param: yyy" + xxx = yyy +} + +// Must treat yyy as leaking because *yyy leaks, and the escape analysis +// summaries in exported metadata do not distinguish these two cases. +func foo13(yyy **int) { // ERROR "leaking param: yyy" + *xxx = *yyy +} + +func foo14(yyy **int) { // ERROR "yyy does not escape" + **xxx = **yyy +} + +func foo15(yy *int) { // ERROR "moved to heap: yy" + xxx = &yy // ERROR "&yy escapes to heap" +} + +func foo16(yy *int) { // ERROR "leaking param: yy" + *xxx = yy +} + +func foo17(yy *int) { // ERROR "yy does not escape" + **xxx = *yy +} + +func foo18(y int) { // ERROR "moved to heap: "y" + *xxx = &y // ERROR "&y escapes to heap" +} + +func foo19(y int) { + **xxx = y +} + +type Bar struct { + i int + ii *int +} + +func NewBar() *Bar { + return &Bar{42, nil} // ERROR "&Bar literal escapes to heap" +} + +func NewBarp(x *int) *Bar { // ERROR "leaking param: x" + return &Bar{42, x} // ERROR "&Bar literal escapes to heap" +} + +func NewBarp2(x *int) *Bar { // ERROR "x does not escape" + return &Bar{*x, nil} // ERROR "&Bar literal escapes to heap" +} + +func (b *Bar) NoLeak() int { // ERROR "b does not escape" + return *(b.ii) +} + +func (b *Bar) Leak() *int { // ERROR "leaking param: b" + return &b.i // ERROR "&b.i escapes to heap" +} + +func (b *Bar) AlsoNoLeak() *int { // ERROR "b does not escape" + return b.ii +} + +func (b Bar) AlsoLeak() *int { // ERROR "leaking param: b" + return b.ii +} + +func (b Bar) LeaksToo() *int { // ERROR "leaking param: b" + v := 0 // ERROR "moved to heap: v" + b.ii = &v // ERROR "&v escapes" + return b.ii +} + +func (b *Bar) LeaksABit() *int { // ERROR "b does not escape" + v := 0 // ERROR "moved to heap: v" + b.ii = &v // ERROR "&v escapes" + return b.ii +} + +func (b Bar) StillNoLeak() int { // ERROR "b does not escape" + v := 0 + b.ii = &v // ERROR "&v does not escape" + return b.i +} + +func goLeak(b *Bar) { // ERROR "leaking param: b" + go b.NoLeak() +} + +type Bar2 struct { + i [12]int + ii []int +} + +func NewBar2() *Bar2 { + return &Bar2{[12]int{42}, nil} // ERROR "&Bar2 literal escapes to heap" +} + +func (b *Bar2) NoLeak() int { // ERROR "b does not escape" + return b.i[0] +} + +func (b *Bar2) Leak() []int { // ERROR "leaking param: b" + return b.i[:] // ERROR "b.i escapes to heap" +} + +func (b *Bar2) AlsoNoLeak() []int { // ERROR "b does not escape" + return b.ii[0:1] +} + +func (b Bar2) AgainNoLeak() [12]int { // ERROR "b does not escape" + return b.i +} + +func (b *Bar2) LeakSelf() { // ERROR "leaking param: b" + b.ii = b.i[0:4] // ERROR "b.i escapes to heap" +} + +func (b *Bar2) LeakSelf2() { // ERROR "leaking param: b" + var buf []int + buf = b.i[0:] // ERROR "b.i escapes to heap" + b.ii = buf +} + +func foo21() func() int { + x := 42 // ERROR "moved to heap: x" + return func() int { // ERROR "func literal escapes to heap" + return x // ERROR "&x escapes to heap" + } +} + +func foo22() int { + x := 42 + return func() int { // ERROR "func literal does not escape" + return x + }() +} + +func foo23(x int) func() int { // ERROR "moved to heap: x" + return func() int { // ERROR "func literal escapes to heap" + return x // ERROR "&x escapes to heap" + } +} + +func foo23a(x int) func() int { // ERROR "moved to heap: x" + f := func() int { // ERROR "func literal escapes to heap" + return x // ERROR "&x escapes to heap" + } + return f +} + +func foo23b(x int) *(func() int) { // ERROR "moved to heap: x" + f := func() int { return x } // ERROR "moved to heap: f" "func literal escapes to heap" "&x escapes to heap" + return &f // ERROR "&f escapes to heap" +} + +func foo24(x int) int { + return func() int { // ERROR "func literal does not escape" + return x + }() +} + +var x *int + +func fooleak(xx *int) int { // ERROR "leaking param: xx" + x = xx + return *x +} + +func foonoleak(xx *int) int { // ERROR "xx does not escape" + return *x + *xx +} + +func foo31(x int) int { // ERROR "moved to heap: x" + return fooleak(&x) // ERROR "&x escapes to heap" +} + +func foo32(x int) int { + return foonoleak(&x) // ERROR "&x does not escape" +} + +type Foo struct { + xx *int + x int +} + +var F Foo +var pf *Foo + +func (f *Foo) fooleak() { // ERROR "leaking param: f" + pf = f +} + +func (f *Foo) foonoleak() { // ERROR "f does not escape" + F.x = f.x +} + +func (f *Foo) Leak() { // ERROR "leaking param: f" + f.fooleak() +} + +func (f *Foo) NoLeak() { // ERROR "f does not escape" + f.foonoleak() +} + +func foo41(x int) { // ERROR "moved to heap: x" + F.xx = &x // ERROR "&x escapes to heap" +} + +func (f *Foo) foo42(x int) { // ERROR "f does not escape" "moved to heap: x" + f.xx = &x // ERROR "&x escapes to heap" +} + +func foo43(f *Foo, x int) { // ERROR "f does not escape" "moved to heap: x" + f.xx = &x // ERROR "&x escapes to heap" +} + +func foo44(yy *int) { // ERROR "leaking param: yy" + F.xx = yy +} + +func (f *Foo) foo45() { // ERROR "f does not escape" + F.x = f.x +} + +// See foo13 above for explanation of why f leaks. +func (f *Foo) foo46() { // ERROR "leaking param: f" + F.xx = f.xx +} + +func (f *Foo) foo47() { // ERROR "leaking param: f" + f.xx = &f.x // ERROR "&f.x escapes to heap" +} + +var ptrSlice []*int + +func foo50(i *int) { // ERROR "leaking param: i" + ptrSlice[0] = i +} + +var ptrMap map[*int]*int + +func foo51(i *int) { // ERROR "leaking param: i" + ptrMap[i] = i +} + +func indaddr1(x int) *int { // ERROR "moved to heap: x" + return &x // ERROR "&x escapes to heap" +} + +func indaddr2(x *int) *int { // ERROR "leaking param: x" + return *&x // ERROR "&x does not escape" +} + +func indaddr3(x *int32) *int { // ERROR "leaking param: x" + return *(**int)(unsafe.Pointer(&x)) // ERROR "&x does not escape" +} + +// From package math: + +func Float32bits(f float32) uint32 { + return *(*uint32)(unsafe.Pointer(&f)) // ERROR "&f does not escape" +} + +func Float32frombits(b uint32) float32 { + return *(*float32)(unsafe.Pointer(&b)) // ERROR "&b does not escape" +} + +func Float64bits(f float64) uint64 { + return *(*uint64)(unsafe.Pointer(&f)) // ERROR "&f does not escape" +} + +func Float64frombits(b uint64) float64 { + return *(*float64)(unsafe.Pointer(&b)) // ERROR "&b does not escape" +} + +// contrast with +func float64bitsptr(f float64) *uint64 { // ERROR "moved to heap: f" + return (*uint64)(unsafe.Pointer(&f)) // ERROR "&f escapes to heap" +} + +func float64ptrbitsptr(f *float64) *uint64 { // ERROR "leaking param: f" + return (*uint64)(unsafe.Pointer(f)) +} + +func typesw(i interface{}) *int { // ERROR "leaking param: i" + switch val := i.(type) { + case *int: + return val + case *int8: + v := int(*val) // ERROR "moved to heap: v" + return &v // ERROR "&v escapes to heap" + } + return nil +} + +func exprsw(i *int) *int { // ERROR "leaking param: i" + switch j := i; *j + 110 { + case 12: + return j + case 42: + return nil + } + return nil + +} + +// assigning to an array element is like assigning to the array +func foo60(i *int) *int { // ERROR "leaking param: i" + var a [12]*int + a[0] = i + return a[1] +} + +func foo60a(i *int) *int { // ERROR "i does not escape" + var a [12]*int + a[0] = i + return nil +} + +// assigning to a struct field is like assigning to the struct +func foo61(i *int) *int { // ERROR "leaking param: i" + type S struct { + a, b *int + } + var s S + s.a = i + return s.b +} + +func foo61a(i *int) *int { // ERROR "i does not escape" + type S struct { + a, b *int + } + var s S + s.a = i + return nil +} + +// assigning to a struct field is like assigning to the struct but +// here this subtlety is lost, since s.a counts as an assignment to a +// track-losing dereference. +func foo62(i *int) *int { // ERROR "leaking param: i" + type S struct { + a, b *int + } + s := new(S) // ERROR "new[(]S[)] does not escape" + s.a = i + return nil // s.b +} + +type M interface { + M() +} + +func foo63(m M) { // ERROR "m does not escape" +} + +func foo64(m M) { // ERROR "leaking param: m" + m.M() +} + +func foo64b(m M) { // ERROR "leaking param: m" + defer m.M() +} + +type MV int + +func (MV) M() {} + +func foo65() { + var mv MV + foo63(&mv) // ERROR "&mv does not escape" +} + +func foo66() { + var mv MV // ERROR "moved to heap: mv" + foo64(&mv) // ERROR "&mv escapes to heap" +} + +func foo67() { + var mv MV + foo63(mv) +} + +func foo68() { + var mv MV + foo64(mv) // escapes but it's an int so irrelevant +} + +func foo69(m M) { // ERROR "leaking param: m" + foo64(m) +} + +func foo70(mv1 *MV, m M) { // ERROR "leaking param: mv1" "leaking param: m" + m = mv1 + foo64(m) +} + +func foo71(x *int) []*int { // ERROR "leaking param: x" + var y []*int + y = append(y, x) + return y +} + +func foo71a(x int) []*int { // ERROR "moved to heap: x" + var y []*int + y = append(y, &x) // ERROR "&x escapes to heap" + return y +} + +func foo72() { + var x int + var y [1]*int + y[0] = &x // ERROR "&x does not escape" +} + +func foo72aa() [10]*int { + var x int // ERROR "moved to heap: x" + var y [10]*int + y[0] = &x // ERROR "&x escapes to heap" + return y +} + +func foo72a() { + var y [10]*int + for i := 0; i < 10; i++ { + // escapes its scope + x := i // ERROR "moved to heap: x" + y[i] = &x // ERROR "&x escapes to heap" + } + return +} + +func foo72b() [10]*int { + var y [10]*int + for i := 0; i < 10; i++ { + x := i // ERROR "moved to heap: x" + y[i] = &x // ERROR "&x escapes to heap" + } + return y +} + +// issue 2145 +func foo73() { + s := []int{3, 2, 1} // ERROR "\[\]int literal does not escape" + for _, v := range s { + vv := v // ERROR "moved to heap: vv" + // actually just escapes its scope + defer func() { // ERROR "func literal escapes to heap" + println(vv) // ERROR "&vv escapes to heap" + }() + } +} + +func foo74() { + s := []int{3, 2, 1} // ERROR "\[\]int literal does not escape" + for _, v := range s { + vv := v // ERROR "moved to heap: vv" + // actually just escapes its scope + fn := func() { // ERROR "func literal escapes to heap" + println(vv) // ERROR "&vv escapes to heap" + } + defer fn() + } +} + +// issue 3975 +func foo74b() { + var array [3]func() + s := []int{3, 2, 1} // ERROR "\[\]int literal does not escape" + for i, v := range s { + vv := v // ERROR "moved to heap: vv" + // actually just escapes its scope + array[i] = func() { // ERROR "func literal escapes to heap" + println(vv) // ERROR "&vv escapes to heap" + } + } +} + +func myprint(y *int, x ...interface{}) *int { // ERROR "x does not escape" "leaking param: y" + return y +} + +func myprint1(y *int, x ...interface{}) *interface{} { // ERROR "y does not escape" "leaking param: x" + return &x[0] // ERROR "&x.0. escapes to heap" +} + +func foo75(z *int) { // ERROR "z does not escape" + myprint(z, 1, 2, 3) // ERROR "[.][.][.] argument does not escape" +} + +func foo75a(z *int) { // ERROR "z does not escape" + myprint1(z, 1, 2, 3) // ERROR "[.][.][.] argument does not escape" +} + +func foo75esc(z *int) { // ERROR "leaking param: z" + gxx = myprint(z, 1, 2, 3) // ERROR "[.][.][.] argument does not escape" +} + +func foo75aesc(z *int) { // ERROR "z does not escape" + var ppi **interface{} // assignments to pointer dereferences lose track + *ppi = myprint1(z, 1, 2, 3) // ERROR "[.][.][.] argument escapes to heap" +} + +func foo76(z *int) { // ERROR "leaking param: z" + myprint(nil, z) // ERROR "[.][.][.] argument does not escape" +} + +func foo76a(z *int) { // ERROR "leaking param: z" + myprint1(nil, z) // ERROR "[.][.][.] argument does not escape" +} + +func foo76b() { + myprint(nil, 1, 2, 3) // ERROR "[.][.][.] argument does not escape" +} + +func foo76c() { + myprint1(nil, 1, 2, 3) // ERROR "[.][.][.] argument does not escape" +} + +func foo76d() { + defer myprint(nil, 1, 2, 3) // ERROR "[.][.][.] argument does not escape" +} + +func foo76e() { + defer myprint1(nil, 1, 2, 3) // ERROR "[.][.][.] argument does not escape" +} + +func foo76f() { + for { + // TODO: This one really only escapes its scope, but we don't distinguish yet. + defer myprint(nil, 1, 2, 3) // ERROR "[.][.][.] argument escapes to heap" + } +} + +func foo76g() { + for { + defer myprint1(nil, 1, 2, 3) // ERROR "[.][.][.] argument escapes to heap" + } +} + +func foo77(z []interface{}) { // ERROR "z does not escape" + myprint(nil, z...) // z does not escape +} + +func foo77a(z []interface{}) { // ERROR "z does not escape" + myprint1(nil, z...) +} + +func foo77b(z []interface{}) { // ERROR "leaking param: z" + var ppi **interface{} + *ppi = myprint1(nil, z...) +} + +func foo78(z int) *int { // ERROR "moved to heap: z" + return &z // ERROR "&z escapes to heap" +} + +func foo78a(z int) *int { // ERROR "moved to heap: z" + y := &z // ERROR "&z escapes to heap" + x := &y // ERROR "&y does not escape" + return *x // really return y +} + +func foo79() *int { + return new(int) // ERROR "new[(]int[)] escapes to heap" +} + +func foo80() *int { + var z *int + for { + // Really just escapes its scope but we don't distinguish + z = new(int) // ERROR "new[(]int[)] escapes to heap" + } + _ = z + return nil +} + +func foo81() *int { + for { + z := new(int) // ERROR "new[(]int[)] does not escape" + _ = z + } + return nil +} + +func tee(p *int) (x, y *int) { return p, p } // ERROR "leaking param" + +func noop(x, y *int) {} // ERROR "does not escape" + +func foo82() { + var x, y, z int // ERROR "moved to heap" + go noop(tee(&z)) // ERROR "&z escapes to heap" + go noop(&x, &y) // ERROR "escapes to heap" + for { + var u, v, w int // ERROR "moved to heap" + defer noop(tee(&u)) // ERROR "&u escapes to heap" + defer noop(&v, &w) // ERROR "escapes to heap" + } +} + +type Fooer interface { + Foo() +} + +type LimitedFooer struct { + Fooer + N int64 +} + +func LimitFooer(r Fooer, n int64) Fooer { // ERROR "leaking param: r" + return &LimitedFooer{r, n} // ERROR "&LimitedFooer literal escapes to heap" +} + +func foo90(x *int) map[*int]*int { // ERROR "leaking param: x" + return map[*int]*int{nil: x} // ERROR "map\[\*int\]\*int literal escapes to heap" +} + +func foo91(x *int) map[*int]*int { // ERROR "leaking param: x" + return map[*int]*int{x: nil} // ERROR "map\[\*int\]\*int literal escapes to heap" +} + +func foo92(x *int) [2]*int { // ERROR "leaking param: x" + return [2]*int{x, nil} +} + +// does not leak c +func foo93(c chan *int) *int { // ERROR "c does not escape" + for v := range c { + return v + } + return nil +} + +// does not leak m +func foo94(m map[*int]*int, b bool) *int { // ERROR "m does not escape" + for k, v := range m { + if b { + return k + } + return v + } + return nil +} + +// does leak x +func foo95(m map[*int]*int, x *int) { // ERROR "m does not escape" "leaking param: x" + m[x] = x +} + +// does not leak m +func foo96(m []*int) *int { // ERROR "m does not escape" + return m[0] +} + +// does leak m +func foo97(m [1]*int) *int { // ERROR "leaking param: m" + return m[0] +} + +// does not leak m +func foo98(m map[int]*int) *int { // ERROR "m does not escape" + return m[0] +} + +// does leak m +func foo99(m *[1]*int) []*int { // ERROR "leaking param: m" + return m[:] +} + +// does not leak m +func foo100(m []*int) *int { // ERROR "m does not escape" + for _, v := range m { + return v + } + return nil +} + +// does leak m +func foo101(m [1]*int) *int { // ERROR "leaking param: m" + for _, v := range m { + return v + } + return nil +} + +// does not leak m +func foo101a(m [1]*int) *int { // ERROR "m does not escape" + for i := range m { // ERROR "moved to heap: i" + return &i // ERROR "&i escapes to heap" + } + return nil +} + +// does leak x +func foo102(m []*int, x *int) { // ERROR "m does not escape" "leaking param: x" + m[0] = x +} + +// does not leak x +func foo103(m [1]*int, x *int) { // ERROR "m does not escape" "x does not escape" + m[0] = x +} + +var y []*int + +// does not leak x +func foo104(x []*int) { // ERROR "x does not escape" + copy(y, x) +} + +// does not leak x +func foo105(x []*int) { // ERROR "x does not escape" + _ = append(y, x...) +} + +// does leak x +func foo106(x *int) { // ERROR "leaking param: x" + _ = append(y, x) +} + +func foo107(x *int) map[*int]*int { // ERROR "leaking param: x" + return map[*int]*int{x: nil} // ERROR "map.* literal escapes to heap" +} + +func foo108(x *int) map[*int]*int { // ERROR "leaking param: x" + return map[*int]*int{nil: x} // ERROR "map.* literal escapes to heap" +} + +func foo109(x *int) *int { // ERROR "leaking param: x" + m := map[*int]*int{x: nil} // ERROR "map.* literal does not escape" + for k, _ := range m { + return k + } + return nil +} + +func foo110(x *int) *int { // ERROR "leaking param: x" + m := map[*int]*int{nil: x} // ERROR "map.* literal does not escape" + return m[nil] +} + +func foo111(x *int) *int { // ERROR "leaking param: x" + m := []*int{x} // ERROR "\[\]\*int literal does not escape" + return m[0] +} + +func foo112(x *int) *int { // ERROR "leaking param: x" + m := [1]*int{x} + return m[0] +} + +func foo113(x *int) *int { // ERROR "leaking param: x" + m := Bar{ii: x} + return m.ii +} + +func foo114(x *int) *int { // ERROR "leaking param: x" + m := &Bar{ii: x} // ERROR "&Bar literal does not escape" + return m.ii +} + +func foo115(x *int) *int { // ERROR "leaking param: x" + return (*int)(unsafe.Pointer(uintptr(unsafe.Pointer(x)) + 1)) +} + +func foo116(b bool) *int { + if b { + x := 1 // ERROR "moved to heap: x" + return &x // ERROR "&x escapes to heap" + } else { + y := 1 // ERROR "moved to heap: y" + return &y // ERROR "&y escapes to heap" + } + return nil +} + +func foo117(unknown func(interface{})) { // ERROR "unknown does not escape" + x := 1 // ERROR "moved to heap: x" + unknown(&x) // ERROR "&x escapes to heap" +} + +func foo118(unknown func(*int)) { // ERROR "unknown does not escape" + x := 1 // ERROR "moved to heap: x" + unknown(&x) // ERROR "&x escapes to heap" +} + +func external(*int) + +func foo119(x *int) { // ERROR "leaking param: x" + external(x) +} + +func foo120() { + // formerly exponential time analysis +L1: +L2: +L3: +L4: +L5: +L6: +L7: +L8: +L9: +L10: +L11: +L12: +L13: +L14: +L15: +L16: +L17: +L18: +L19: +L20: +L21: +L22: +L23: +L24: +L25: +L26: +L27: +L28: +L29: +L30: +L31: +L32: +L33: +L34: +L35: +L36: +L37: +L38: +L39: +L40: +L41: +L42: +L43: +L44: +L45: +L46: +L47: +L48: +L49: +L50: +L51: +L52: +L53: +L54: +L55: +L56: +L57: +L58: +L59: +L60: +L61: +L62: +L63: +L64: +L65: +L66: +L67: +L68: +L69: +L70: +L71: +L72: +L73: +L74: +L75: +L76: +L77: +L78: +L79: +L80: +L81: +L82: +L83: +L84: +L85: +L86: +L87: +L88: +L89: +L90: +L91: +L92: +L93: +L94: +L95: +L96: +L97: +L98: +L99: +L100: + // use the labels to silence compiler errors + goto L1 + goto L2 + goto L3 + goto L4 + goto L5 + goto L6 + goto L7 + goto L8 + goto L9 + goto L10 + goto L11 + goto L12 + goto L13 + goto L14 + goto L15 + goto L16 + goto L17 + goto L18 + goto L19 + goto L20 + goto L21 + goto L22 + goto L23 + goto L24 + goto L25 + goto L26 + goto L27 + goto L28 + goto L29 + goto L30 + goto L31 + goto L32 + goto L33 + goto L34 + goto L35 + goto L36 + goto L37 + goto L38 + goto L39 + goto L40 + goto L41 + goto L42 + goto L43 + goto L44 + goto L45 + goto L46 + goto L47 + goto L48 + goto L49 + goto L50 + goto L51 + goto L52 + goto L53 + goto L54 + goto L55 + goto L56 + goto L57 + goto L58 + goto L59 + goto L60 + goto L61 + goto L62 + goto L63 + goto L64 + goto L65 + goto L66 + goto L67 + goto L68 + goto L69 + goto L70 + goto L71 + goto L72 + goto L73 + goto L74 + goto L75 + goto L76 + goto L77 + goto L78 + goto L79 + goto L80 + goto L81 + goto L82 + goto L83 + goto L84 + goto L85 + goto L86 + goto L87 + goto L88 + goto L89 + goto L90 + goto L91 + goto L92 + goto L93 + goto L94 + goto L95 + goto L96 + goto L97 + goto L98 + goto L99 + goto L100 +} + +func foo121() { + for i := 0; i < 10; i++ { + defer myprint(nil, i) // ERROR "[.][.][.] argument escapes to heap" + go myprint(nil, i) // ERROR "[.][.][.] argument escapes to heap" + } +} + +// same as foo121 but check across import +func foo121b() { + for i := 0; i < 10; i++ { + defer fmt.Printf("%d", i) // ERROR "[.][.][.] argument escapes to heap" + go fmt.Printf("%d", i) // ERROR "[.][.][.] argument escapes to heap" + } +} + +// a harmless forward jump +func foo122() { + var i *int + + goto L1 +L1: + i = new(int) // ERROR "new.int. does not escape" + _ = i +} + +// a backward jump, increases loopdepth +func foo123() { + var i *int + +L1: + i = new(int) // ERROR "new.int. escapes to heap" + + goto L1 + _ = i +} + +func foo124(x **int) { // ERROR "x does not escape" + var i int // ERROR "moved to heap: i" + p := &i // ERROR "&i escapes" + func() { // ERROR "func literal does not escape" + *x = p // ERROR "leaking closure reference p" + }() +} + +func foo125(ch chan *int) { // ERROR "does not escape" + var i int // ERROR "moved to heap" + p := &i // ERROR "&i escapes to heap" + func() { // ERROR "func literal does not escape" + ch <- p // ERROR "leaking closure reference p" + }() +} + +func foo126() { + var px *int // loopdepth 0 + for { + // loopdepth 1 + var i int // ERROR "moved to heap" + func() { // ERROR "func literal does not escape" + px = &i // ERROR "&i escapes" + }() + } + _ = px +} + +var px *int + +func foo127() { + var i int // ERROR "moved to heap: i" + p := &i // ERROR "&i escapes to heap" + q := p + px = q +} + +func foo128() { + var i int + p := &i // ERROR "&i does not escape" + q := p + _ = q +} + +func foo129() { + var i int // ERROR "moved to heap: i" + p := &i // ERROR "&i escapes to heap" + func() { // ERROR "func literal does not escape" + q := p // ERROR "leaking closure reference p" + func() { // ERROR "func literal does not escape" + r := q // ERROR "leaking closure reference q" + px = r + }() + }() +} + +func foo130() { + for { + var i int // ERROR "moved to heap" + func() { // ERROR "func literal does not escape" + px = &i // ERROR "&i escapes" "leaking closure reference i" + }() + } +} + +func foo131() { + var i int // ERROR "moved to heap" + func() { // ERROR "func literal does not escape" + px = &i // ERROR "&i escapes" "leaking closure reference i" + }() +} + +func foo132() { + var i int // ERROR "moved to heap" + go func() { // ERROR "func literal escapes to heap" + px = &i // ERROR "&i escapes" "leaking closure reference i" + }() +} + +func foo133() { + var i int // ERROR "moved to heap" + defer func() { // ERROR "func literal does not escape" + px = &i // ERROR "&i escapes" "leaking closure reference i" + }() +} + +func foo134() { + var i int + p := &i // ERROR "&i does not escape" + func() { // ERROR "func literal does not escape" + q := p + func() { // ERROR "func literal does not escape" + r := q + _ = r + }() + }() +} + +func foo135() { + var i int // ERROR "moved to heap: i" + p := &i // ERROR "&i escapes to heap" "moved to heap: p" + go func() { // ERROR "func literal escapes to heap" + q := p // ERROR "&p escapes to heap" + func() { // ERROR "func literal does not escape" + r := q + _ = r + }() + }() +} + +func foo136() { + var i int // ERROR "moved to heap: i" + p := &i // ERROR "&i escapes to heap" "moved to heap: p" + go func() { // ERROR "func literal escapes to heap" + q := p // ERROR "&p escapes to heap" "leaking closure reference p" + func() { // ERROR "func literal does not escape" + r := q // ERROR "leaking closure reference q" + px = r + }() + }() +} + +func foo137() { + var i int // ERROR "moved to heap: i" + p := &i // ERROR "&i escapes to heap" + func() { // ERROR "func literal does not escape" + q := p // ERROR "leaking closure reference p" "moved to heap: q" + go func() { // ERROR "func literal escapes to heap" + r := q // ERROR "&q escapes to heap" + _ = r + }() + }() +} + +func foo138() *byte { + type T struct { + x [1]byte + } + t := new(T) // ERROR "new.T. escapes to heap" + return &t.x[0] // ERROR "&t.x.0. escapes to heap" +} + +func foo139() *byte { + type T struct { + x struct { + y byte + } + } + t := new(T) // ERROR "new.T. escapes to heap" + return &t.x.y // ERROR "&t.x.y escapes to heap" +} + +// issue 4751 +func foo140() interface{} { + type T struct { + X string + } + type U struct { + X string + T *T + } + t := &T{} // ERROR "&T literal escapes to heap" + return U{ + X: t.X, + T: t, + } +} + +//go:noescape + +func F1([]byte) + +func F2([]byte) + +//go:noescape + +func F3(x []byte) // ERROR "F3 x does not escape" + +func F4(x []byte) + +func G() { + var buf1 [10]byte + F1(buf1[:]) // ERROR "buf1 does not escape" + + var buf2 [10]byte // ERROR "moved to heap: buf2" + F2(buf2[:]) // ERROR "buf2 escapes to heap" + + var buf3 [10]byte + F3(buf3[:]) // ERROR "buf3 does not escape" + + var buf4 [10]byte // ERROR "moved to heap: buf4" + F4(buf4[:]) // ERROR "buf4 escapes to heap" +} + +type Tm struct { + x int +} + +func (t *Tm) M() { // ERROR "t does not escape" +} + +func foo141() { + var f func() + + t := new(Tm) // ERROR "escapes to heap" + f = t.M // ERROR "t.M does not escape" + _ = f +} + +var gf func() + +func foo142() { + t := new(Tm) // ERROR "escapes to heap" + gf = t.M // ERROR "t.M escapes to heap" +} + +// issue 3888. +func foo143() { + for i := 0; i < 1000; i++ { + func() { // ERROR "func literal does not escape" + for i := 0; i < 1; i++ { + var t Tm + t.M() // ERROR "t does not escape" + } + }() + } +} + +// issue 5773 +// Check that annotations take effect regardless of whether they +// are before or after the use in the source code. + +//go:noescape + +func foo144a(*int) + +func foo144() { + var x int + foo144a(&x) // ERROR "&x does not escape" + var y int + foo144b(&y) // ERROR "&y does not escape" +} + +//go:noescape + +func foo144b(*int) |