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cmd/compile: skip escape analysis diagnostics for OADDR

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For most nodes (e.g., OPTRLIT, OMAKESLICE, OCONVIFACE), escape
analysis prints "escapes to heap" or "does not escape" to indicate
whether that node's allocation can be heap or stack allocated.

These messages are also emitted for OADDR, even though OADDR does not
actually allocate anything itself. Moreover, it's redundant because
escape analysis already prints "moved to heap" diagnostics when an
OADDR node like "&x" causes x to require heap allocation.

Because OADDR nodes don't allocate memory, my escape analysis rewrite
doesn't naturally emit the "escapes to heap" / "does not escape"
diagnostics for them. It's also non-trivial to replicate the exact
semantics esc.go uses for OADDR.

Since there are so many of these messages, I'm disabling them in this
CL by themselves. I modified esc.go to suppress the Warnl calls
without any other behavior changes, and then used a shell script to
automatically remove any ERROR messages mentioned by run.go in
"missing error" or "no match for" lines.

Fixes #16300.
Updates #23109.

Change-Id: I3993e2743c3ff83ccd0893f4e73b366ff8871a57
Reviewed-on: https://go-review.googlesource.com/c/go/+/170319
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Reviewed-by: David Chase <drchase@google.com>
This commit is contained in:
Matthew Dempsky 2019-04-01 11:58:33 -07:00
parent 4ebc6514fa
commit abefcac10a
31 changed files with 643 additions and 643 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
src/cmd/compile/internal/gc/esc.go
View File

@ -399,7 +399,7 @@ func escAnalyze(all []*Node, recursive bool) {
if Debug['m'] != 0 {
for _, n := range e.noesc {
if n.Esc == EscNone {
if n.Esc == EscNone && n.Op != OADDR {
Warnl(n.Pos, "%v %S does not escape", e.curfnSym(n), n)
}
}
@ -1894,7 +1894,7 @@ func (e *EscState) escwalkBody(level Level, dst *Node, src *Node, step *EscStep,
}
if leaks {
src.Esc = EscHeap
if Debug['m'] != 0 && osrcesc != src.Esc {
if Debug['m'] != 0 && osrcesc != src.Esc && src.Op != OADDR {
p := src
if p.Left.Op == OCLOSURE {
p = p.Left // merely to satisfy error messages in tests

6
test/closure3.dir/main.go
View File

@ -208,7 +208,7 @@ func main() {
func() { // ERROR "func literal does not escape"
func() { // ERROR "can inline main.func24"
a = 2
}() // ERROR "inlining call to main.func24" "&a does not escape"
}() // ERROR "inlining call to main.func24"
}()
if a != 2 {
ppanic("a != 2")
@ -220,7 +220,7 @@ func main() {
func(b int) { // ERROR "func literal does not escape"
func() { // ERROR "can inline main.func25.1"
b = 3
}() // ERROR "inlining call to main.func25.1" "&b does not escape"
}() // ERROR "inlining call to main.func25.1"
if b != 3 {
ppanic("b != 3")
}
@ -272,7 +272,7 @@ func main() {
a = a * x
b = b * y
c = c * z
}(10) // ERROR "inlining call to main.func28.1.1" "&a does not escape" "&b does not escape" "&c does not escape"
}(10) // ERROR "inlining call to main.func28.1.1"
return a + c
}(100) + b
}(1000); r != 2350 {

194
test/escape2.go
View File

@ -19,7 +19,7 @@ import (
var gxx *int
func foo1(x int) { // ERROR "moved to heap: x$"
gxx = &x // ERROR "&x escapes to heap$"
gxx = &x
}
func foo2(yy *int) { // ERROR "leaking param: yy$"
@ -27,7 +27,7 @@ func foo2(yy *int) { // ERROR "leaking param: yy$"
}
func foo3(x int) *int { // ERROR "moved to heap: x$"
return &x // ERROR "&x escapes to heap$"
return &x
}
type T *T
@ -43,7 +43,7 @@ func foo4(xx, yy *int) { // ERROR "foo4 xx does not escape$" "foo4 yy does not e
// xx isn't going anywhere, so taking address of yy is ok
func foo5(xx **int, yy *int) { // ERROR "foo5 xx does not escape$" "foo5 yy does not escape$"
xx = &yy // ERROR "foo5 &yy does not escape$"
xx = &yy
}
func foo6(xx **int, yy *int) { // ERROR "foo6 xx does not escape$" "leaking param: yy$"
@ -70,8 +70,8 @@ func foo10(xx, yy *int) { // ERROR "foo10 xx does not escape$" "foo10 yy does no
func foo11() int {
x, y := 0, 42
xx := &x // ERROR "foo11 &x does not escape$"
yy := &y // ERROR "foo11 &y does not escape$"
xx := &x
yy := &y
*xx = *yy
return x
}
@ -93,7 +93,7 @@ func foo14(yyy **int) { // ERROR "foo14 yyy does not escape$"
}
func foo15(yy *int) { // ERROR "moved to heap: yy$"
xxx = &yy // ERROR "&yy escapes to heap$"
xxx = &yy
}
func foo16(yy *int) { // ERROR "leaking param: yy$"
@ -105,7 +105,7 @@ func foo17(yy *int) { // ERROR "foo17 yy does not escape$"
}
func foo18(y int) { // ERROR "moved to heap: y$"
*xxx = &y // ERROR "&y escapes to heap$"
*xxx = &y
}
func foo19(y int) {
@ -134,7 +134,7 @@ func (b *Bar) NoLeak() int { // ERROR "\(\*Bar\).NoLeak b does not escape$"
}
func (b *Bar) Leak() *int { // ERROR "leaking param: b to result ~r0 level=0$"
return &b.i // ERROR "&b.i escapes to heap$"
return &b.i
}
func (b *Bar) AlsoNoLeak() *int { // ERROR "leaking param: b to result ~r0 level=1$"
@ -147,19 +147,19 @@ func (b Bar) AlsoLeak() *int { // ERROR "leaking param: b to result ~r0 level=0$
func (b Bar) LeaksToo() *int { // ERROR "leaking param: b to result ~r0 level=0$"
v := 0 // ERROR "moved to heap: v$"
b.ii = &v // ERROR "&v escapes to heap$"
b.ii = &v
return b.ii
}
func (b *Bar) LeaksABit() *int { // ERROR "leaking param: b to result ~r0 level=1$"
v := 0 // ERROR "moved to heap: v$"
b.ii = &v // ERROR "&v escapes to heap$"
b.ii = &v
return b.ii
}
func (b Bar) StillNoLeak() int { // ERROR "Bar.StillNoLeak b does not escape$"
v := 0
b.ii = &v // ERROR "Bar.StillNoLeak &v does not escape$"
b.ii = &v
return b.i
}
@ -181,7 +181,7 @@ func (b *Bar2) NoLeak() int { // ERROR "\(\*Bar2\).NoLeak b does not escape$"
}
func (b *Bar2) Leak() []int { // ERROR "leaking param: b to result ~r0 level=0$"
return b.i[:] // ERROR "b.i escapes to heap$"
return b.i[:]
}
func (b *Bar2) AlsoNoLeak() []int { // ERROR "leaking param: b to result ~r0 level=1$"
@ -193,12 +193,12 @@ func (b Bar2) AgainNoLeak() [12]int { // ERROR "Bar2.AgainNoLeak b does not esca
}
func (b *Bar2) LeakSelf() { // ERROR "leaking param: b$"
b.ii = b.i[0:4] // ERROR "b.i escapes to heap$"
b.ii = b.i[0:4]
}
func (b *Bar2) LeakSelf2() { // ERROR "leaking param: b$"
var buf []int
buf = b.i[0:] // ERROR "b.i escapes to heap$"
buf = b.i[0:]
b.ii = buf
}
@ -212,7 +212,7 @@ func foo21() func() int {
func foo21a() func() int {
x := 42 // ERROR "moved to heap: x$"
return func() int { // ERROR "func literal escapes to heap$"
x++ // ERROR "&x escapes to heap$"
x++
return x
}
}
@ -239,12 +239,12 @@ func foo23a(x int) func() int {
func foo23b(x int) *(func() int) {
f := func() int { return x } // ERROR "func literal escapes to heap$" "moved to heap: f$"
return &f // ERROR "&f escapes to heap$"
return &f
}
func foo23c(x int) func() int { // ERROR "moved to heap: x$"
return func() int { // ERROR "func literal escapes to heap$"
x++ // ERROR "&x escapes to heap$"
x++
return x
}
}
@ -267,11 +267,11 @@ func foonoleak(xx *int) int { // ERROR "foonoleak xx does not escape$"
}
func foo31(x int) int { // ERROR "moved to heap: x$"
return fooleak(&x) // ERROR "&x escapes to heap$"
return fooleak(&x)
}
func foo32(x int) int {
return foonoleak(&x) // ERROR "foo32 &x does not escape$"
return foonoleak(&x)
}
type Foo struct {
@ -299,15 +299,15 @@ func (f *Foo) NoLeak() { // ERROR "\(\*Foo\).NoLeak f does not escape$"
}
func foo41(x int) { // ERROR "moved to heap: x$"
F.xx = &x // ERROR "&x escapes to heap$"
F.xx = &x
}
func (f *Foo) foo42(x int) { // ERROR "\(\*Foo\).foo42 f does not escape$" "moved to heap: x$"
f.xx = &x // ERROR "&x escapes to heap$"
f.xx = &x
}
func foo43(f *Foo, x int) { // ERROR "foo43 f does not escape$" "moved to heap: x$"
f.xx = &x // ERROR "&x escapes to heap$"
f.xx = &x
}
func foo44(yy *int) { // ERROR "leaking param: yy$"
@ -324,7 +324,7 @@ func (f *Foo) foo46() { // ERROR "leaking param content: f$"
}
func (f *Foo) foo47() { // ERROR "leaking param: f$"
f.xx = &f.x // ERROR "&f.x escapes to heap$"
f.xx = &f.x
}
var ptrSlice []*int
@ -340,38 +340,38 @@ func foo51(i *int) { // ERROR "leaking param: i$"
}
func indaddr1(x int) *int { // ERROR "moved to heap: x$"
return &x // ERROR "&x escapes to heap$"
return &x
}
func indaddr2(x *int) *int { // ERROR "leaking param: x to result ~r1 level=0$"
return *&x // ERROR "indaddr2 &x does not escape$"
return *&x
}
func indaddr3(x *int32) *int { // ERROR "leaking param: x to result ~r1 level=0$"
return *(**int)(unsafe.Pointer(&x)) // ERROR "indaddr3 &x does not escape$"
return *(**int)(unsafe.Pointer(&x))
}
// From package math:
func Float32bits(f float32) uint32 {
return *(*uint32)(unsafe.Pointer(&f)) // ERROR "Float32bits &f does not escape$"
return *(*uint32)(unsafe.Pointer(&f))
}
func Float32frombits(b uint32) float32 {
return *(*float32)(unsafe.Pointer(&b)) // ERROR "Float32frombits &b does not escape$"
return *(*float32)(unsafe.Pointer(&b))
}
func Float64bits(f float64) uint64 {
return *(*uint64)(unsafe.Pointer(&f)) // ERROR "Float64bits &f does not escape$"
return *(*uint64)(unsafe.Pointer(&f))
}
func Float64frombits(b uint64) float64 {
return *(*float64)(unsafe.Pointer(&b)) // ERROR "Float64frombits &b does not escape$"
return *(*float64)(unsafe.Pointer(&b))
}
// contrast with
func float64bitsptr(f float64) *uint64 { // ERROR "moved to heap: f$"
return (*uint64)(unsafe.Pointer(&f)) // ERROR "&f escapes to heap$"
return (*uint64)(unsafe.Pointer(&f))
}
func float64ptrbitsptr(f *float64) *uint64 { // ERROR "leaking param: f to result ~r1 level=0$"
@ -384,7 +384,7 @@ func typesw(i interface{}) *int { // ERROR "leaking param: i to result ~r1 level
return val
case *int8:
v := int(*val) // ERROR "moved to heap: v$"
return &v // ERROR "&v escapes to heap$"
return &v
}
return nil
}
@ -501,20 +501,20 @@ func foo71(x *int) []*int { // ERROR "leaking param: x$"
func foo71a(x int) []*int { // ERROR "moved to heap: x$"
var y []*int
y = append(y, &x) // ERROR "&x escapes to heap$"
y = append(y, &x)
return y
}
func foo72() {
var x int
var y [1]*int
y[0] = &x // ERROR "foo72 &x does not escape$"
y[0] = &x
}
func foo72aa() [10]*int {
var x int // ERROR "moved to heap: x$"
var y [10]*int
y[0] = &x // ERROR "&x escapes to heap$"
y[0] = &x
return y
}
@ -523,7 +523,7 @@ func foo72a() {
for i := 0; i < 10; i++ {
// escapes its scope
x := i // ERROR "moved to heap: x$"
y[i] = &x // ERROR "&x escapes to heap$"
y[i] = &x
}
return
}
@ -532,7 +532,7 @@ func foo72b() [10]*int {
var y [10]*int
for i := 0; i < 10; i++ {
x := i // ERROR "moved to heap: x$"
y[i] = &x // ERROR "&x escapes to heap$"
y[i] = &x
}
return y
}
@ -555,7 +555,7 @@ func foo731() {
vv := v // ERROR "moved to heap: vv$"
// actually just escapes its scope
defer func() { // ERROR "func literal escapes to heap$"
vv = 42 // ERROR "&vv escapes to heap$"
vv = 42
println(vv)
}()
}
@ -579,7 +579,7 @@ func foo74a() {
vv := v // ERROR "moved to heap: vv$"
// actually just escapes its scope
fn := func() { // ERROR "func literal escapes to heap$"
vv += 1 // ERROR "&vv escapes to heap$"
vv += 1
println(vv)
}
defer fn()
@ -606,7 +606,7 @@ func foo74c() {
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$" "foo74c.func1 &vv does not escape$"
println(&vv)
}
}
}
@ -616,7 +616,7 @@ func myprint(y *int, x ...interface{}) *int { // ERROR "leaking param: y to resu
}
func myprint1(y *int, x ...interface{}) *interface{} { // ERROR "leaking param: x to result ~r2 level=0$" "myprint1 y does not escape$"
return &x[0] // ERROR "&x\[0\] escapes to heap$"
return &x[0]
}
func foo75(z *int) { // ERROR "foo75 z does not escape$"
@ -703,12 +703,12 @@ func dotdotdot() {
}
func foo78(z int) *int { // ERROR "moved to heap: z$"
return &z // ERROR "&z escapes to heap$"
return &z
}
func foo78a(z int) *int { // ERROR "moved to heap: z$"
y := &z // ERROR "&z escapes to heap$"
x := &y // ERROR "foo78a &y does not escape$"
y := &z
x := &y
return *x // really return y
}
@ -740,12 +740,12 @@ func noop(x, y *int) {} // ERROR "noop x does not escape$" "noop y does not esca
func foo82() {
var x, y, z int // ERROR "moved to heap: x$" "moved to heap: y$" "moved to heap: z$"
go noop(tee(&z)) // ERROR "&z escapes to heap$"
go noop(&x, &y) // ERROR "&x escapes to heap$" "&y escapes to heap$"
go noop(tee(&z))
go noop(&x, &y)
for {
var u, v, w int // ERROR "moved to heap: u$" "moved to heap: v$" "moved to heap: w$"
defer noop(tee(&u)) // ERROR "&u escapes to heap$"
defer noop(&v, &w) // ERROR "&v escapes to heap$" "&w escapes to heap$"
defer noop(tee(&u))
defer noop(&v, &w)
}
}
@ -837,7 +837,7 @@ func foo101(m [1]*int) *int { // ERROR "leaking param: m to result ~r1 level=0$"
// does not leak m
func foo101a(m [1]*int) *int { // ERROR "foo101a m does not escape$"
for i := range m { // ERROR "moved to heap: i$"
return &i // ERROR "&i escapes to heap$"
return &i
}
return nil
}
@ -917,10 +917,10 @@ func foo115(x *int) *int { // ERROR "leaking param: x to result ~r1 level=0$"
func foo116(b bool) *int {
if b {
x := 1 // ERROR "moved to heap: x$"
return &x // ERROR "&x escapes to heap$"
return &x
} else {
y := 1 // ERROR "moved to heap: y$"
return &y // ERROR "&y escapes to heap$"
return &y
}
return nil
}
@ -932,7 +932,7 @@ func foo117(unknown func(interface{})) { // ERROR "foo117 unknown does not escap
func foo118(unknown func(*int)) { // ERROR "foo118 unknown does not escape$"
x := 1 // ERROR "moved to heap: x$"
unknown(&x) // ERROR "&x escapes to heap$"
unknown(&x)
}
func external(*int)
@ -1184,7 +1184,7 @@ L1:
func foo124(x **int) { // ERROR "foo124 x does not escape$"
var i int // ERROR "moved to heap: i$"
p := &i // ERROR "&i escapes to heap$"
p := &i
func() { // ERROR "foo124 func literal does not escape$"
*x = p // ERROR "leaking closure reference p$"
}()
@ -1192,7 +1192,7 @@ func foo124(x **int) { // ERROR "foo124 x does not escape$"
func foo125(ch chan *int) { // ERROR "foo125 ch does not escape$"
var i int // ERROR "moved to heap: i$"
p := &i // ERROR "&i escapes to heap$"
p := &i
func() { // ERROR "foo125 func literal does not escape$"
ch <- p // ERROR "leaking closure reference p$"
}()
@ -1204,7 +1204,7 @@ func foo126() {
// loopdepth 1
var i int // ERROR "moved to heap: i$"
func() { // ERROR "foo126 func literal does not escape$"
px = &i // ERROR "&i escapes to heap$" "leaking closure reference i"
px = &i // ERROR "leaking closure reference i"
}()
}
_ = px
@ -1214,21 +1214,21 @@ var px *int
func foo127() {
var i int // ERROR "moved to heap: i$"
p := &i // ERROR "&i escapes to heap$"
p := &i
q := p
px = q
}
func foo128() {
var i int
p := &i // ERROR "foo128 &i does not escape$"
p := &i
q := p
_ = q
}
func foo129() {
var i int // ERROR "moved to heap: i$"
p := &i // ERROR "&i escapes to heap$"
p := &i
func() { // ERROR "foo129 func literal does not escape$"
q := p // ERROR "leaking closure reference p$"
func() { // ERROR "foo129.func1 func literal does not escape$"
@ -1242,7 +1242,7 @@ func foo130() {
for {
var i int // ERROR "moved to heap: i$"
func() { // ERROR "foo130 func literal does not escape$"
px = &i // ERROR "&i escapes to heap$" "leaking closure reference i$"
px = &i // ERROR "leaking closure reference i$"
}()
}
}
@ -1250,27 +1250,27 @@ func foo130() {
func foo131() {
var i int // ERROR "moved to heap: i$"
func() { // ERROR "foo131 func literal does not escape$"
px = &i // ERROR "&i escapes to heap$" "leaking closure reference i$"
px = &i // ERROR "leaking closure reference i$"
}()
}
func foo132() {
var i int // ERROR "moved to heap: i$"
go func() { // ERROR "func literal escapes to heap$"
px = &i // ERROR "&i escapes to heap$" "leaking closure reference i$"
px = &i // ERROR "leaking closure reference i$"
}()
}
func foo133() {
var i int // ERROR "moved to heap: i$"
defer func() { // ERROR "foo133 func literal does not escape$"
px = &i // ERROR "&i escapes to heap$" "leaking closure reference i$"
px = &i // ERROR "leaking closure reference i$"
}()
}
func foo134() {
var i int
p := &i // ERROR "foo134 &i does not escape$"
p := &i
func() { // ERROR "foo134 func literal does not escape$"
q := p
func() { // ERROR "foo134.func1 func literal does not escape$"
@ -1282,7 +1282,7 @@ func foo134() {
func foo135() {
var i int // ERROR "moved to heap: i$"
p := &i // ERROR "&i escapes to heap$"
p := &i
go func() { // ERROR "func literal escapes to heap$"
q := p
func() { // ERROR "foo135.func1 func literal does not escape$"
@ -1294,7 +1294,7 @@ func foo135() {
func foo136() {
var i int // ERROR "moved to heap: i$"
p := &i // ERROR "&i escapes to heap$"
p := &i
go func() { // ERROR "func literal escapes to heap$"
q := p // ERROR "leaking closure reference p$"
func() { // ERROR "foo136.func1 func literal does not escape$"
@ -1306,7 +1306,7 @@ func foo136() {
func foo137() {
var i int // ERROR "moved to heap: i$"
p := &i // ERROR "&i escapes to heap$"
p := &i
func() { // ERROR "foo137 func literal does not escape$"
q := p // ERROR "leaking closure reference p$"
go func() { // ERROR "func literal escapes to heap$"
@ -1321,7 +1321,7 @@ func foo138() *byte {
x [1]byte
}
t := new(T) // ERROR "new\(T\) escapes to heap$"
return &t.x[0] // ERROR "&t.x\[0\] escapes to heap$"
return &t.x[0]
}
func foo139() *byte {
@ -1331,7 +1331,7 @@ func foo139() *byte {
}
}
t := new(T) // ERROR "new\(T\) escapes to heap$"
return &t.x.y // ERROR "&t.x.y escapes to heap$"
return &t.x.y
}
// issue 4751
@ -1364,16 +1364,16 @@ func F4(x []byte)
func G() {
var buf1 [10]byte
F1(buf1[:]) // ERROR "G buf1 does not escape$"
F1(buf1[:])
var buf2 [10]byte // ERROR "moved to heap: buf2$"
F2(buf2[:]) // ERROR "buf2 escapes to heap$"
F2(buf2[:])
var buf3 [10]byte
F3(buf3[:]) // ERROR "G buf3 does not escape$"
F3(buf3[:])
var buf4 [10]byte // ERROR "moved to heap: buf4$"
F4(buf4[:]) // ERROR "buf4 escapes to heap$"
F4(buf4[:])
}
type Tm struct {
@ -1404,7 +1404,7 @@ func foo143() {
func() { // ERROR "foo143 func literal does not escape$"
for i := 0; i < 1; i++ {
var t Tm
t.M() // ERROR "foo143.func1 t does not escape$"
t.M()
}
}()
}
@ -1420,9 +1420,9 @@ func foo144a(*int)
func foo144() {
var x int
foo144a(&x) // ERROR "foo144 &x does not escape$"
foo144a(&x)
var y int
foo144b(&y) // ERROR "foo144 &y does not escape$"
foo144b(&y)
}
//go:noescape
@ -1437,27 +1437,27 @@ type List struct {
func foo145(l List) { // ERROR "foo145 l does not escape$"
var p *List
for p = &l; p.Next != nil; p = p.Next { // ERROR "foo145 &l does not escape$"
for p = &l; p.Next != nil; p = p.Next {
}
}
func foo146(l List) { // ERROR "foo146 l does not escape$"
var p *List
p = &l // ERROR "foo146 &l does not escape$"
p = &l
for ; p.Next != nil; p = p.Next {
}
}
func foo147(l List) { // ERROR "foo147 l does not escape$"
var p *List
p = &l // ERROR "foo147 &l does not escape$"
p = &l
for p.Next != nil {
p = p.Next
}
}
func foo148(l List) { // ERROR "foo148 l does not escape$"
for p := &l; p.Next != nil; p = p.Next { // ERROR "foo148 &l does not escape$"
for p := &l; p.Next != nil; p = p.Next {
}
}
@ -1466,7 +1466,7 @@ func foo148(l List) { // ERROR "foo148 l does not escape$"
func foo149(l List) { // ERROR "foo149 l does not escape$"
var p *List
for {
for p = &l; p.Next != nil; p = p.Next { // ERROR "foo149 &l does not escape$"
for p = &l; p.Next != nil; p = p.Next {
}
}
}
@ -1494,25 +1494,25 @@ func foo151(x *int) { // ERROR "leaking param: x$"
func bar151() {
var a [64]int // ERROR "moved to heap: a$"
a[4] = 101
foo151(&(&a)[4:8][0]) // ERROR "&\(&a\)\[4:8\]\[0\] escapes to heap$" "&a escapes to heap$"
foo151(&(&a)[4:8][0])
}
func bar151b() {
var a [10]int // ERROR "moved to heap: a$"
b := a[:] // ERROR "a escapes to heap$"
foo151(&b[4:8][0]) // ERROR "&b\[4:8\]\[0\] escapes to heap$"
b := a[:]
foo151(&b[4:8][0])
}
func bar151c() {
var a [64]int // ERROR "moved to heap: a$"
a[4] = 101
foo151(&(&a)[4:8:8][0]) // ERROR "&\(&a\)\[4:8:8\]\[0\] escapes to heap$" "&a escapes to heap$"
foo151(&(&a)[4:8:8][0])
}
func bar151d() {
var a [10]int // ERROR "moved to heap: a$"
b := a[:] // ERROR "a escapes to heap$"
foo151(&b[4:8:8][0]) // ERROR "&b\[4:8:8\]\[0\] escapes to heap$"
b := a[:]
foo151(&b[4:8:8][0])
}
// issue 8120
@ -1531,12 +1531,12 @@ type V struct {
// BAD -- level of leak ought to be 0
func NewV(u U) *V { // ERROR "leaking param: u to result ~r1 level=-1"
return &V{u.String()} // ERROR "&V literal escapes to heap$" "NewV u does not escape"
return &V{u.String()} // ERROR "&V literal escapes to heap$"
}
func foo152() {
a := "a" // ERROR "moved to heap: a$"
u := U{&a} // ERROR "&a escapes to heap$"
u := U{&a}
v := NewV(u)
println(v)
}
@ -1546,7 +1546,7 @@ func foo152() {
func foo153(v interface{}) *int { // ERROR "leaking param: v to result ~r1 level=-1$"
switch x := v.(type) {
case int: // ERROR "moved to heap: x$"
return &x // ERROR "&x escapes to heap$"
return &x
}
panic(0)
}
@ -1554,7 +1554,7 @@ func foo153(v interface{}) *int { // ERROR "leaking param: v to result ~r1 level
// issue 8185 - &result escaping into result
func f() (x int, y *int) { // ERROR "moved to heap: x$"
y = &x // ERROR "&x escapes to heap$"
y = &x
return
}
@ -1572,21 +1572,21 @@ type Lit struct {
func ptrlitNoescape() {
// Both literal and element do not escape.
i := 0
x := &Lit{&i} // ERROR "ptrlitNoescape &Lit literal does not escape$" "ptrlitNoescape &i does not escape$"
x := &Lit{&i} // ERROR "ptrlitNoescape &Lit literal does not escape$"
_ = x
}
func ptrlitNoEscape2() {
// Literal does not escape, but element does.
i := 0 // ERROR "moved to heap: i$"
x := &Lit{&i} // ERROR "&i escapes to heap$" "ptrlitNoEscape2 &Lit literal does not escape$"
x := &Lit{&i} // ERROR "ptrlitNoEscape2 &Lit literal does not escape$"
sink = *x // ERROR "\*x escapes to heap$"
}
func ptrlitEscape() {
// Both literal and element escape.
i := 0 // ERROR "moved to heap: i$"
x := &Lit{&i} // ERROR "&Lit literal escapes to heap$" "&i escapes to heap$"
x := &Lit{&i} // ERROR "&Lit literal escapes to heap$"
sink = x // ERROR "x escapes to heap$"
}
@ -1609,7 +1609,7 @@ func (b *Buffer) foo() { // ERROR "\(\*Buffer\).foo b does not escape$"
}
func (b *Buffer) bar() { // ERROR "leaking param: b$"
b.buf1 = b.arr[1:2] // ERROR "b.arr escapes to heap$"
b.buf1 = b.arr[1:2]
}
func (b *Buffer) arrayPtr() { // ERROR "\(\*Buffer\).arrayPtr b does not escape"
@ -1644,7 +1644,7 @@ type StructWithString struct {
func fieldFlowTracking() {
var x StructWithString
i := 0 // ERROR "moved to heap: i$"
x.p = &i // ERROR "&i escapes to heap$"
x.p = &i
sink = x.s // ERROR "x.s escapes to heap$"
}
@ -1836,11 +1836,11 @@ func issue12397(x, y int) { // ERROR "moved to heap: y$"
if false {
gxx = &x
} else {
gxx = &y // ERROR "&y escapes to heap$"
gxx = &y
}
if true {
gxx = &y // ERROR "&y escapes to heap$"
gxx = &y
} else {
gxx = &x
}

194
test/escape2n.go
View File

@ -19,7 +19,7 @@ import (
var gxx *int
func foo1(x int) { // ERROR "moved to heap: x$"
gxx = &x // ERROR "&x escapes to heap$"
gxx = &x
}
func foo2(yy *int) { // ERROR "leaking param: yy$"
@ -27,7 +27,7 @@ func foo2(yy *int) { // ERROR "leaking param: yy$"
}
func foo3(x int) *int { // ERROR "moved to heap: x$"
return &x // ERROR "&x escapes to heap$"
return &x
}
type T *T
@ -43,7 +43,7 @@ func foo4(xx, yy *int) { // ERROR "foo4 xx does not escape$" "foo4 yy does not e
// xx isn't going anywhere, so taking address of yy is ok
func foo5(xx **int, yy *int) { // ERROR "foo5 xx does not escape$" "foo5 yy does not escape$"
xx = &yy // ERROR "foo5 &yy does not escape$"
xx = &yy
}
func foo6(xx **int, yy *int) { // ERROR "foo6 xx does not escape$" "leaking param: yy$"
@ -70,8 +70,8 @@ func foo10(xx, yy *int) { // ERROR "foo10 xx does not escape$" "foo10 yy does no
func foo11() int {
x, y := 0, 42
xx := &x // ERROR "foo11 &x does not escape$"
yy := &y // ERROR "foo11 &y does not escape$"
xx := &x
yy := &y
*xx = *yy
return x
}
@ -93,7 +93,7 @@ func foo14(yyy **int) { // ERROR "foo14 yyy does not escape$"
}
func foo15(yy *int) { // ERROR "moved to heap: yy$"
xxx = &yy // ERROR "&yy escapes to heap$"
xxx = &yy
}
func foo16(yy *int) { // ERROR "leaking param: yy$"
@ -105,7 +105,7 @@ func foo17(yy *int) { // ERROR "foo17 yy does not escape$"
}
func foo18(y int) { // ERROR "moved to heap: y$"
*xxx = &y // ERROR "&y escapes to heap$"
*xxx = &y
}
func foo19(y int) {
@ -134,7 +134,7 @@ func (b *Bar) NoLeak() int { // ERROR "\(\*Bar\).NoLeak b does not escape$"
}
func (b *Bar) Leak() *int { // ERROR "leaking param: b to result ~r0 level=0$"
return &b.i // ERROR "&b.i escapes to heap$"
return &b.i
}
func (b *Bar) AlsoNoLeak() *int { // ERROR "leaking param: b to result ~r0 level=1$"
@ -147,19 +147,19 @@ func (b Bar) AlsoLeak() *int { // ERROR "leaking param: b to result ~r0 level=0$
func (b Bar) LeaksToo() *int { // ERROR "leaking param: b to result ~r0 level=0$"
v := 0 // ERROR "moved to heap: v$"
b.ii = &v // ERROR "&v escapes to heap$"
b.ii = &v
return b.ii
}
func (b *Bar) LeaksABit() *int { // ERROR "leaking param: b to result ~r0 level=1$"
v := 0 // ERROR "moved to heap: v$"
b.ii = &v // ERROR "&v escapes to heap$"
b.ii = &v
return b.ii
}
func (b Bar) StillNoLeak() int { // ERROR "Bar.StillNoLeak b does not escape$"
v := 0
b.ii = &v // ERROR "Bar.StillNoLeak &v does not escape$"
b.ii = &v
return b.i
}
@ -181,7 +181,7 @@ func (b *Bar2) NoLeak() int { // ERROR "\(\*Bar2\).NoLeak b does not escape$"
}
func (b *Bar2) Leak() []int { // ERROR "leaking param: b to result ~r0 level=0$"
return b.i[:] // ERROR "b.i escapes to heap$"
return b.i[:]
}
func (b *Bar2) AlsoNoLeak() []int { // ERROR "leaking param: b to result ~r0 level=1$"
@ -193,12 +193,12 @@ func (b Bar2) AgainNoLeak() [12]int { // ERROR "Bar2.AgainNoLeak b does not esca
}
func (b *Bar2) LeakSelf() { // ERROR "leaking param: b$"
b.ii = b.i[0:4] // ERROR "b.i escapes to heap$"
b.ii = b.i[0:4]
}
func (b *Bar2) LeakSelf2() { // ERROR "leaking param: b$"
var buf []int
buf = b.i[0:] // ERROR "b.i escapes to heap$"
buf = b.i[0:]
b.ii = buf
}
@ -212,7 +212,7 @@ func foo21() func() int {
func foo21a() func() int {
x := 42 // ERROR "moved to heap: x$"
return func() int { // ERROR "func literal escapes to heap$"
x++ // ERROR "&x escapes to heap$"
x++
return x
}
}
@ -239,12 +239,12 @@ func foo23a(x int) func() int {
func foo23b(x int) *(func() int) {
f := func() int { return x } // ERROR "func literal escapes to heap$" "moved to heap: f$"
return &f // ERROR "&f escapes to heap$"
return &f
}
func foo23c(x int) func() int { // ERROR "moved to heap: x$"
return func() int { // ERROR "func literal escapes to heap$"
x++ // ERROR "&x escapes to heap$"
x++
return x
}
}
@ -267,11 +267,11 @@ func foonoleak(xx *int) int { // ERROR "foonoleak xx does not escape$"
}
func foo31(x int) int { // ERROR "moved to heap: x$"
return fooleak(&x) // ERROR "&x escapes to heap$"
return fooleak(&x)
}
func foo32(x int) int {
return foonoleak(&x) // ERROR "foo32 &x does not escape$"
return foonoleak(&x)
}
type Foo struct {
@ -299,15 +299,15 @@ func (f *Foo) NoLeak() { // ERROR "\(\*Foo\).NoLeak f does not escape$"
}
func foo41(x int) { // ERROR "moved to heap: x$"
F.xx = &x // ERROR "&x escapes to heap$"
F.xx = &x
}
func (f *Foo) foo42(x int) { // ERROR "\(\*Foo\).foo42 f does not escape$" "moved to heap: x$"
f.xx = &x // ERROR "&x escapes to heap$"
f.xx = &x
}
func foo43(f *Foo, x int) { // ERROR "foo43 f does not escape$" "moved to heap: x$"
f.xx = &x // ERROR "&x escapes to heap$"
f.xx = &x
}
func foo44(yy *int) { // ERROR "leaking param: yy$"
@ -324,7 +324,7 @@ func (f *Foo) foo46() { // ERROR "leaking param content: f$"
}
func (f *Foo) foo47() { // ERROR "leaking param: f$"
f.xx = &f.x // ERROR "&f.x escapes to heap$"
f.xx = &f.x
}
var ptrSlice []*int
@ -340,38 +340,38 @@ func foo51(i *int) { // ERROR "leaking param: i$"
}
func indaddr1(x int) *int { // ERROR "moved to heap: x$"
return &x // ERROR "&x escapes to heap$"
return &x
}
func indaddr2(x *int) *int { // ERROR "leaking param: x to result ~r1 level=0$"
return *&x // ERROR "indaddr2 &x does not escape$"
return *&x
}
func indaddr3(x *int32) *int { // ERROR "leaking param: x to result ~r1 level=0$"
return *(**int)(unsafe.Pointer(&x)) // ERROR "indaddr3 &x does not escape$"
return *(**int)(unsafe.Pointer(&x))
}
// From package math:
func Float32bits(f float32) uint32 {
return *(*uint32)(unsafe.Pointer(&f)) // ERROR "Float32bits &f does not escape$"
return *(*uint32)(unsafe.Pointer(&f))
}
func Float32frombits(b uint32) float32 {
return *(*float32)(unsafe.Pointer(&b)) // ERROR "Float32frombits &b does not escape$"
return *(*float32)(unsafe.Pointer(&b))
}
func Float64bits(f float64) uint64 {
return *(*uint64)(unsafe.Pointer(&f)) // ERROR "Float64bits &f does not escape$"
return *(*uint64)(unsafe.Pointer(&f))
}
func Float64frombits(b uint64) float64 {
return *(*float64)(unsafe.Pointer(&b)) // ERROR "Float64frombits &b does not escape$"
return *(*float64)(unsafe.Pointer(&b))
}
// contrast with
func float64bitsptr(f float64) *uint64 { // ERROR "moved to heap: f$"
return (*uint64)(unsafe.Pointer(&f)) // ERROR "&f escapes to heap$"
return (*uint64)(unsafe.Pointer(&f))
}
func float64ptrbitsptr(f *float64) *uint64 { // ERROR "leaking param: f to result ~r1 level=0$"
@ -384,7 +384,7 @@ func typesw(i interface{}) *int { // ERROR "leaking param: i to result ~r1 level
return val
case *int8:
v := int(*val) // ERROR "moved to heap: v$"
return &v // ERROR "&v escapes to heap$"
return &v
}
return nil
}
@ -501,20 +501,20 @@ func foo71(x *int) []*int { // ERROR "leaking param: x$"
func foo71a(x int) []*int { // ERROR "moved to heap: x$"
var y []*int
y = append(y, &x) // ERROR "&x escapes to heap$"
y = append(y, &x)
return y
}
func foo72() {
var x int
var y [1]*int
y[0] = &x // ERROR "foo72 &x does not escape$"
y[0] = &x
}
func foo72aa() [10]*int {
var x int // ERROR "moved to heap: x$"
var y [10]*int
y[0] = &x // ERROR "&x escapes to heap$"
y[0] = &x
return y
}
@ -523,7 +523,7 @@ func foo72a() {
for i := 0; i < 10; i++ {
// escapes its scope
x := i // ERROR "moved to heap: x$"
y[i] = &x // ERROR "&x escapes to heap$"
y[i] = &x
}
return
}
@ -532,7 +532,7 @@ func foo72b() [10]*int {
var y [10]*int
for i := 0; i < 10; i++ {
x := i // ERROR "moved to heap: x$"
y[i] = &x // ERROR "&x escapes to heap$"
y[i] = &x
}
return y
}
@ -555,7 +555,7 @@ func foo731() {
vv := v // ERROR "moved to heap: vv$"
// actually just escapes its scope
defer func() { // ERROR "func literal escapes to heap$"
vv = 42 // ERROR "&vv escapes to heap$"
vv = 42
println(vv)
}()
}
@ -579,7 +579,7 @@ func foo74a() {
vv := v // ERROR "moved to heap: vv$"
// actually just escapes its scope
fn := func() { // ERROR "func literal escapes to heap$"
vv += 1 // ERROR "&vv escapes to heap$"
vv += 1
println(vv)
}
defer fn()
@ -606,7 +606,7 @@ func foo74c() {
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$" "foo74c.func1 &vv does not escape$"
println(&vv)
}
}
}
@ -616,7 +616,7 @@ func myprint(y *int, x ...interface{}) *int { // ERROR "leaking param: y to resu
}
func myprint1(y *int, x ...interface{}) *interface{} { // ERROR "leaking param: x to result ~r2 level=0$" "myprint1 y does not escape$"
return &x[0] // ERROR "&x\[0\] escapes to heap$"
return &x[0]
}
func foo75(z *int) { // ERROR "foo75 z does not escape$"
@ -703,12 +703,12 @@ func dotdotdot() {
}
func foo78(z int) *int { // ERROR "moved to heap: z$"
return &z // ERROR "&z escapes to heap$"
return &z
}
func foo78a(z int) *int { // ERROR "moved to heap: z$"
y := &z // ERROR "&z escapes to heap$"
x := &y // ERROR "foo78a &y does not escape$"
y := &z
x := &y
return *x // really return y
}
@ -740,12 +740,12 @@ func noop(x, y *int) {} // ERROR "noop x does not escape$" "noop y does not esca
func foo82() {
var x, y, z int // ERROR "moved to heap: x$" "moved to heap: y$" "moved to heap: z$"
go noop(tee(&z)) // ERROR "&z escapes to heap$"
go noop(&x, &y) // ERROR "&x escapes to heap$" "&y escapes to heap$"
go noop(tee(&z))
go noop(&x, &y)
for {
var u, v, w int // ERROR "moved to heap: u$" "moved to heap: v$" "moved to heap: w$"
defer noop(tee(&u)) // ERROR "&u escapes to heap$"
defer noop(&v, &w) // ERROR "&v escapes to heap$" "&w escapes to heap$"
defer noop(tee(&u))
defer noop(&v, &w)
}
}
@ -837,7 +837,7 @@ func foo101(m [1]*int) *int { // ERROR "leaking param: m to result ~r1 level=0$"
// does not leak m
func foo101a(m [1]*int) *int { // ERROR "foo101a m does not escape$"
for i := range m { // ERROR "moved to heap: i$"
return &i // ERROR "&i escapes to heap$"
return &i
}
return nil
}
@ -917,10 +917,10 @@ func foo115(x *int) *int { // ERROR "leaking param: x to result ~r1 level=0$"
func foo116(b bool) *int {
if b {
x := 1 // ERROR "moved to heap: x$"
return &x // ERROR "&x escapes to heap$"
return &x
} else {
y := 1 // ERROR "moved to heap: y$"
return &y // ERROR "&y escapes to heap$"
return &y
}
return nil
}
@ -932,7 +932,7 @@ func foo117(unknown func(interface{})) { // ERROR "foo117 unknown does not escap
func foo118(unknown func(*int)) { // ERROR "foo118 unknown does not escape$"
x := 1 // ERROR "moved to heap: x$"
unknown(&x) // ERROR "&x escapes to heap$"
unknown(&x)
}
func external(*int)
@ -1184,7 +1184,7 @@ L1:
func foo124(x **int) { // ERROR "foo124 x does not escape$"
var i int // ERROR "moved to heap: i$"
p := &i // ERROR "&i escapes to heap$"
p := &i
func() { // ERROR "foo124 func literal does not escape$"
*x = p // ERROR "leaking closure reference p$"
}()
@ -1192,7 +1192,7 @@ func foo124(x **int) { // ERROR "foo124 x does not escape$"
func foo125(ch chan *int) { // ERROR "foo125 ch does not escape$"
var i int // ERROR "moved to heap: i$"
p := &i // ERROR "&i escapes to heap$"
p := &i
func() { // ERROR "foo125 func literal does not escape$"
ch <- p // ERROR "leaking closure reference p$"
}()
@ -1204,7 +1204,7 @@ func foo126() {
// loopdepth 1
var i int // ERROR "moved to heap: i$"
func() { // ERROR "foo126 func literal does not escape$"
px = &i // ERROR "&i escapes to heap$" "leaking closure reference i"
px = &i // ERROR "leaking closure reference i"
}()
}
_ = px
@ -1214,21 +1214,21 @@ var px *int
func foo127() {
var i int // ERROR "moved to heap: i$"
p := &i // ERROR "&i escapes to heap$"
p := &i
q := p
px = q
}
func foo128() {
var i int
p := &i // ERROR "foo128 &i does not escape$"
p := &i
q := p
_ = q
}
func foo129() {
var i int // ERROR "moved to heap: i$"
p := &i // ERROR "&i escapes to heap$"
p := &i
func() { // ERROR "foo129 func literal does not escape$"
q := p // ERROR "leaking closure reference p$"
func() { // ERROR "foo129.func1 func literal does not escape$"
@ -1242,7 +1242,7 @@ func foo130() {
for {
var i int // ERROR "moved to heap: i$"
func() { // ERROR "foo130 func literal does not escape$"
px = &i // ERROR "&i escapes to heap$" "leaking closure reference i$"
px = &i // ERROR "leaking closure reference i$"
}()
}
}
@ -1250,27 +1250,27 @@ func foo130() {
func foo131() {
var i int // ERROR "moved to heap: i$"
func() { // ERROR "foo131 func literal does not escape$"
px = &i // ERROR "&i escapes to heap$" "leaking closure reference i$"
px = &i // ERROR "leaking closure reference i$"
}()
}
func foo132() {
var i int // ERROR "moved to heap: i$"
go func() { // ERROR "func literal escapes to heap$"
px = &i // ERROR "&i escapes to heap$" "leaking closure reference i$"
px = &i // ERROR "leaking closure reference i$"
}()
}
func foo133() {
var i int // ERROR "moved to heap: i$"
defer func() { // ERROR "foo133 func literal does not escape$"
px = &i // ERROR "&i escapes to heap$" "leaking closure reference i$"
px = &i // ERROR "leaking closure reference i$"
}()
}
func foo134() {
var i int
p := &i // ERROR "foo134 &i does not escape$"
p := &i
func() { // ERROR "foo134 func literal does not escape$"
q := p
func() { // ERROR "foo134.func1 func literal does not escape$"
@ -1282,7 +1282,7 @@ func foo134() {
func foo135() {
var i int // ERROR "moved to heap: i$"
p := &i // ERROR "&i escapes to heap$"
p := &i
go func() { // ERROR "func literal escapes to heap$"
q := p
func() { // ERROR "foo135.func1 func literal does not escape$"
@ -1294,7 +1294,7 @@ func foo135() {
func foo136() {
var i int // ERROR "moved to heap: i$"
p := &i // ERROR "&i escapes to heap$"
p := &i
go func() { // ERROR "func literal escapes to heap$"
q := p // ERROR "leaking closure reference p$"
func() { // ERROR "foo136.func1 func literal does not escape$"
@ -1306,7 +1306,7 @@ func foo136() {
func foo137() {
var i int // ERROR "moved to heap: i$"
p := &i // ERROR "&i escapes to heap$"
p := &i
func() { // ERROR "foo137 func literal does not escape$"
q := p // ERROR "leaking closure reference p$"
go func() { // ERROR "func literal escapes to heap$"
@ -1321,7 +1321,7 @@ func foo138() *byte {
x [1]byte
}
t := new(T) // ERROR "new\(T\) escapes to heap$"
return &t.x[0] // ERROR "&t.x\[0\] escapes to heap$"
return &t.x[0]
}
func foo139() *byte {
@ -1331,7 +1331,7 @@ func foo139() *byte {
}
}
t := new(T) // ERROR "new\(T\) escapes to heap$"
return &t.x.y // ERROR "&t.x.y escapes to heap$"
return &t.x.y
}
// issue 4751
@ -1364,16 +1364,16 @@ func F4(x []byte)
func G() {
var buf1 [10]byte
F1(buf1[:]) // ERROR "G buf1 does not escape$"
F1(buf1[:])
var buf2 [10]byte // ERROR "moved to heap: buf2$"
F2(buf2[:]) // ERROR "buf2 escapes to heap$"
F2(buf2[:])
var buf3 [10]byte
F3(buf3[:]) // ERROR "G buf3 does not escape$"
F3(buf3[:])
var buf4 [10]byte // ERROR "moved to heap: buf4$"
F4(buf4[:]) // ERROR "buf4 escapes to heap$"
F4(buf4[:])
}
type Tm struct {
@ -1404,7 +1404,7 @@ func foo143() {
func() { // ERROR "foo143 func literal does not escape$"
for i := 0; i < 1; i++ {
var t Tm
t.M() // ERROR "foo143.func1 t does not escape$"
t.M()
}
}()
}
@ -1420,9 +1420,9 @@ func foo144a(*int)
func foo144() {
var x int
foo144a(&x) // ERROR "foo144 &x does not escape$"
foo144a(&x)
var y int
foo144b(&y) // ERROR "foo144 &y does not escape$"
foo144b(&y)
}
//go:noescape
@ -1437,27 +1437,27 @@ type List struct {
func foo145(l List) { // ERROR "foo145 l does not escape$"
var p *List
for p = &l; p.Next != nil; p = p.Next { // ERROR "foo145 &l does not escape$"
for p = &l; p.Next != nil; p = p.Next {
}
}
func foo146(l List) { // ERROR "foo146 l does not escape$"
var p *List
p = &l // ERROR "foo146 &l does not escape$"
p = &l
for ; p.Next != nil; p = p.Next {
}
}
func foo147(l List) { // ERROR "foo147 l does not escape$"
var p *List
p = &l // ERROR "foo147 &l does not escape$"
p = &l
for p.Next != nil {
p = p.Next
}
}
func foo148(l List) { // ERROR "foo148 l does not escape$"
for p := &l; p.Next != nil; p = p.Next { // ERROR "foo148 &l does not escape$"
for p := &l; p.Next != nil; p = p.Next {
}
}
@ -1466,7 +1466,7 @@ func foo148(l List) { // ERROR "foo148 l does not escape$"
func foo149(l List) { // ERROR "foo149 l does not escape$"
var p *List
for {
for p = &l; p.Next != nil; p = p.Next { // ERROR "foo149 &l does not escape$"
for p = &l; p.Next != nil; p = p.Next {
}
}
}
@ -1494,25 +1494,25 @@ func foo151(x *int) { // ERROR "leaking param: x$"
func bar151() {
var a [64]int // ERROR "moved to heap: a$"
a[4] = 101
foo151(&(&a)[4:8][0]) // ERROR "&\(&a\)\[4:8\]\[0\] escapes to heap$" "&a escapes to heap$"
foo151(&(&a)[4:8][0])
}
func bar151b() {
var a [10]int // ERROR "moved to heap: a$"
b := a[:] // ERROR "a escapes to heap$"
foo151(&b[4:8][0]) // ERROR "&b\[4:8\]\[0\] escapes to heap$"
b := a[:]
foo151(&b[4:8][0])
}
func bar151c() {
var a [64]int // ERROR "moved to heap: a$"
a[4] = 101
foo151(&(&a)[4:8:8][0]) // ERROR "&\(&a\)\[4:8:8\]\[0\] escapes to heap$" "&a escapes to heap$"
foo151(&(&a)[4:8:8][0])
}
func bar151d() {
var a [10]int // ERROR "moved to heap: a$"
b := a[:] // ERROR "a escapes to heap$"
foo151(&b[4:8:8][0]) // ERROR "&b\[4:8:8\]\[0\] escapes to heap$"
b := a[:]
foo151(&b[4:8:8][0])
}
// issue 8120
@ -1531,12 +1531,12 @@ type V struct {
// BAD -- level of leak ought to be 0
func NewV(u U) *V { // ERROR "leaking param: u to result ~r1 level=-1"
return &V{u.String()} // ERROR "&V literal escapes to heap$" "NewV u does not escape"
return &V{u.String()} // ERROR "&V literal escapes to heap$"
}
func foo152() {
a := "a" // ERROR "moved to heap: a$"
u := U{&a} // ERROR "&a escapes to heap$"
u := U{&a}
v := NewV(u)
println(v)
}
@ -1546,7 +1546,7 @@ func foo152() {
func foo153(v interface{}) *int { // ERROR "leaking param: v to result ~r1 level=-1$"
switch x := v.(type) {
case int: // ERROR "moved to heap: x$"
return &x // ERROR "&x escapes to heap$"
return &x
}
panic(0)
}
@ -1554,7 +1554,7 @@ func foo153(v interface{}) *int { // ERROR "leaking param: v to result ~r1 level
// issue 8185 - &result escaping into result
func f() (x int, y *int) { // ERROR "moved to heap: x$"
y = &x // ERROR "&x escapes to heap$"
y = &x
return
}
@ -1572,21 +1572,21 @@ type Lit struct {
func ptrlitNoescape() {
// Both literal and element do not escape.
i := 0
x := &Lit{&i} // ERROR "ptrlitNoescape &Lit literal does not escape$" "ptrlitNoescape &i does not escape$"
x := &Lit{&i} // ERROR "ptrlitNoescape &Lit literal does not escape$"
_ = x
}
func ptrlitNoEscape2() {
// Literal does not escape, but element does.
i := 0 // ERROR "moved to heap: i$"
x := &Lit{&i} // ERROR "&i escapes to heap$" "ptrlitNoEscape2 &Lit literal does not escape$"
x := &Lit{&i} // ERROR "ptrlitNoEscape2 &Lit literal does not escape$"
sink = *x // ERROR "\*x escapes to heap$"
}
func ptrlitEscape() {
// Both literal and element escape.
i := 0 // ERROR "moved to heap: i$"
x := &Lit{&i} // ERROR "&Lit literal escapes to heap$" "&i escapes to heap$"
x := &Lit{&i} // ERROR "&Lit literal escapes to heap$"
sink = x // ERROR "x escapes to heap$"
}
@ -1609,7 +1609,7 @@ func (b *Buffer) foo() { // ERROR "\(\*Buffer\).foo b does not escape$"
}
func (b *Buffer) bar() { // ERROR "leaking param: b$"
b.buf1 = b.arr[1:2] // ERROR "b.arr escapes to heap$"
b.buf1 = b.arr[1:2]
}
func (b *Buffer) arrayPtr() { // ERROR "\(\*Buffer\).arrayPtr b does not escape"
@ -1644,7 +1644,7 @@ type StructWithString struct {
func fieldFlowTracking() {
var x StructWithString
i := 0 // ERROR "moved to heap: i$"
x.p = &i // ERROR "&i escapes to heap$"
x.p = &i
sink = x.s // ERROR "x.s escapes to heap$"
}
@ -1836,11 +1836,11 @@ func issue12397(x, y int) { // ERROR "moved to heap: y$"
if false {
gxx = &x
} else {
gxx = &y // ERROR "&y escapes to heap$"
gxx = &y
}
if true {
gxx = &y // ERROR "&y escapes to heap$"
gxx = &y
} else {
gxx = &x
}

12
test/escape4.go
View File

@ -12,22 +12,22 @@ package foo
var p *int
func alloc(x int) *int { // ERROR "can inline alloc" "moved to heap: x"
return &x // ERROR "&x escapes to heap"
return &x
}
var f func()
func f1() {
p = alloc(2) // ERROR "inlining call to alloc" "&x escapes to heap" "moved to heap: x"
p = alloc(2) // ERROR "inlining call to alloc" "moved to heap: x"
// Escape analysis used to miss inlined code in closures.
func() { // ERROR "can inline f1.func1"
p = alloc(3) // ERROR "inlining call to alloc"
}() // ERROR "inlining call to f1.func1" "inlining call to alloc" "&x escapes to heap" "moved to heap: x"
}() // ERROR "inlining call to f1.func1" "inlining call to alloc" "moved to heap: x"
f = func() { // ERROR "func literal escapes to heap" "can inline f1.func2"
p = alloc(3) // ERROR "inlining call to alloc" "&x escapes to heap" "moved to heap: x"
p = alloc(3) // ERROR "inlining call to alloc" "moved to heap: x"
}
f()
}
@ -43,7 +43,7 @@ func f5() *byte {
x [1]byte
}
t := new(T) // ERROR "new.T. escapes to heap"
return &t.x[0] // ERROR "&t.x.0. escapes to heap"
return &t.x[0]
}
func f6() *byte {
@ -53,5 +53,5 @@ func f6() *byte {
}
}
t := new(T) // ERROR "new.T. escapes to heap"
return &t.x.y // ERROR "&t.x.y escapes to heap"
return &t.x.y
}

32
test/escape5.go
View File

@ -60,37 +60,37 @@ func leaktosink(p *int) *int { // ERROR "leaking param: p"
func f1() {
var x int
p := noleak(&x) // ERROR "&x does not escape"
p := noleak(&x)
_ = p
}
func f2() {
var x int
p := leaktoret(&x) // ERROR "&x does not escape"
p := leaktoret(&x)
_ = p
}
func f3() {
var x int // ERROR "moved to heap: x"
p := leaktoret(&x) // ERROR "&x escapes to heap"
p := leaktoret(&x)
gp = p
}
func f4() {
var x int // ERROR "moved to heap: x"
p, q := leaktoret2(&x) // ERROR "&x escapes to heap"
p, q := leaktoret2(&x)
gp = p
gp = q
}
func f5() {
var x int
leaktoret22(leaktoret2(&x)) // ERROR "&x does not escape"
leaktoret22(leaktoret2(&x))
}
func f6() {
var x int // ERROR "moved to heap: x"
px1, px2 := leaktoret22(leaktoret2(&x)) // ERROR "&x escapes to heap"
px1, px2 := leaktoret22(leaktoret2(&x))
gp = px1
_ = px2
}
@ -142,7 +142,7 @@ func f8(p *T1) (k T2) { // ERROR "leaking param: p to result k" "leaking param:
func f9() {
var j T1 // ERROR "moved to heap: j"
f8(&j) // ERROR "&j escapes to heap"
f8(&j)
}
func f10() {
@ -159,8 +159,8 @@ func f12(_ **int) {
}
func f13() {
var x *int
f11(&x) // ERROR "&x does not escape"
f12(&x) // ERROR "&x does not escape"
f11(&x)
f12(&x)
runtime.KeepAlive(&x) // ERROR "&x does not escape"
}
@ -172,8 +172,8 @@ func (_ *U) N() {}
func _() {
var u U
u.M() // ERROR "u does not escape"
u.N() // ERROR "u does not escape"
u.M()
u.N()
}
// Issue 24730: taking address in a loop causes unnecessary escape
@ -182,15 +182,15 @@ type T24730 struct {
}
func (t *T24730) g() { // ERROR "t does not escape"
y := t.x[:] // ERROR "t\.x does not escape"
for i := range t.x[:] { // ERROR "t\.x does not escape"
y = t.x[:] // ERROR "t\.x does not escape"
y := t.x[:]
for i := range t.x[:] {
y = t.x[:]
y[i] = 1
}
var z *byte
for i := range t.x[:] { // ERROR "t\.x does not escape"
z = &t.x[i] // ERROR "t\.x\[i\] does not escape"
for i := range t.x[:] {
z = &t.x[i]
*z = 2
}
}

6
test/escape_array.go
View File

@ -27,16 +27,16 @@ func bff(a, b *string) U { // ERROR "leaking param: a to result ~r2 level=0$" "l
func tbff1() *string {
a := "cat"
b := "dog" // ERROR "moved to heap: b$"
u := bff(&a, &b) // ERROR "tbff1 &a does not escape$" "tbff1 &b does not escape$"
u := bff(&a, &b)
_ = u[0]
return &b // ERROR "&b escapes to heap$"
return &b
}
// BAD: need fine-grained analysis to track u[0] and u[1] differently.
func tbff2() *string {
a := "cat" // ERROR "moved to heap: a$"
b := "dog" // ERROR "moved to heap: b$"
u := bff(&a, &b) // ERROR "&a escapes to heap$" "&b escapes to heap$"
u := bff(&a, &b)
_ = u[0]
return u[1]
}

10
test/escape_because.go
View File

@ -40,7 +40,7 @@ func f2(q *int) { // ERROR "from &u \(address-of\) at escape_because.go:43$" "fr
s := q
t := pair{s, nil}
u := t // ERROR "moved to heap: u$"
sink = &u // ERROR "&u escapes to heap$" "from &u \(interface-converted\) at escape_because.go:43$" "from sink \(assigned to top level variable\) at escape_because.go:43$"
sink = &u // ERROR "&u escapes to heap$" "from sink \(assigned to top level variable\) at escape_because.go:43$"
}
func f3(r *int) interface{} { // ERROR "from \[\]\*int literal \(slice-literal-element\) at escape_because.go:47$" "from c \(assigned\) at escape_because.go:47$" "from c \(interface-converted\) at escape_because.go:48$" "from ~r1 \(return\) at escape_because.go:48$" "leaking param: r"
@ -78,7 +78,7 @@ func f8(x int, y *int) *int { // ERROR "from ~r2 \(return\) at escape_because.go
return y
}
x--
return f8(*y, &x) // ERROR "&x escapes to heap$" "from y \(arg to recursive call\) at escape_because.go:81$" "from ~r2 \(return\) at escape_because.go:78$" "from ~r2 \(returned from recursive function\) at escape_because.go:76$"
return f8(*y, &x)
}
func f9(x int, y ...*int) *int { // ERROR "from y\[0\] \(dot of pointer\) at escape_because.go:86$" "from ~r2 \(return\) at escape_because.go:86$" "from ~r2 \(returned from recursive function\) at escape_because.go:84$" "leaking param content: y$" "leaking param: y to result ~r2 level=1$" "moved to heap: x$"
@ -86,7 +86,7 @@ func f9(x int, y ...*int) *int { // ERROR "from y\[0\] \(dot of pointer\) at esc
return y[0]
}
x--
return f9(*y[0], &x) // ERROR "&x escapes to heap$" "f9 ... argument does not escape$" "from ... argument \(... arg to recursive call\) at escape_because.go:89$"
return f9(*y[0], &x) // ERROR "f9 ... argument does not escape$"
}
func f10(x map[*int]*int, y, z *int) *int { // ERROR "f10 x does not escape$" "from x\[y\] \(key of map put\) at escape_because.go:93$" "from x\[y\] \(value of map put\) at escape_because.go:93$" "leaking param: y$" "leaking param: z$"
@ -132,14 +132,14 @@ func leakThroughOAS2() {
// See #26987.
i := 0 // ERROR "moved to heap: i$"
j := 0 // ERROR "moved to heap: j$"
sink, sink = &i, &j // ERROR "&i escapes to heap$" "from sink \(assign-pair\) at escape_because.go:135$" "from &i \(interface-converted\) at escape_because.go:135$" "&j escapes to heap$" "from &j \(interface-converted\) at escape_because.go:135"
sink, sink = &i, &j // ERROR "&i escapes to heap$" "from sink \(assign-pair\) at escape_because.go:135$" "&j escapes to heap$"
}
func leakThroughOAS2FUNC() {
// See #26987.
i := 0 // ERROR "moved to heap: i$"
j := 0
sink, _ = leakParams(&i, &j) // ERROR "&i escapes to heap$" "&j does not escape$" "from .out0 \(passed-to-and-returned-from-call\) at escape_because.go:142$" "from sink \(assign-pair-func-call\) at escape_because.go:142$"
sink, _ = leakParams(&i, &j)
}
// The list below is all of the why-escapes messages seen building the escape analysis tests.

6
test/escape_calls.go
View File

@ -19,7 +19,7 @@ func g(*byte) string
func h(e int) {
var x [32]byte // ERROR "moved to heap: x$"
g(&f(x[:])[0]) // ERROR "&f\(x\[:\]\)\[0\] escapes to heap$" "x escapes to heap$"
g(&f(x[:])[0])
}
type Node struct {
@ -33,8 +33,8 @@ func walk(np **Node) int { // ERROR "leaking param content: np"
if n == nil {
return 0
}
wl := walk(&n.left) // ERROR "walk &n.left does not escape"
wr := walk(&n.right) // ERROR "walk &n.right does not escape"
wl := walk(&n.left)
wr := walk(&n.right)
if wl < wr {
n.left, n.right = n.right, n.left
wl, wr = wr, wl

36
test/escape_closure.go
View File

@ -15,7 +15,7 @@ func ClosureCallArgs0() {
func(p *int) { // ERROR "p does not escape" "func literal does not escape"
*p = 1
// BAD: x should not escape to heap here
}(&x) // ERROR "&x escapes to heap"
}(&x)
}
func ClosureCallArgs1() {
@ -24,7 +24,7 @@ func ClosureCallArgs1() {
func(p *int) { // ERROR "p does not escape" "func literal does not escape"
*p = 1
// BAD: x should not escape to heap here
}(&x) // ERROR "&x escapes to heap"
}(&x)
}
}
@ -34,7 +34,7 @@ func ClosureCallArgs2() {
x := 0 // ERROR "moved to heap: x"
func(p *int) { // ERROR "p does not escape" "func literal does not escape"
*p = 1
}(&x) // ERROR "&x escapes to heap"
}(&x)
}
}
@ -42,7 +42,7 @@ func ClosureCallArgs3() {
x := 0 // ERROR "moved to heap: x"
func(p *int) { // ERROR "leaking param: p" "func literal does not escape"
sink = p // ERROR "p escapes to heap"
}(&x) // ERROR "&x escapes to heap"
}(&x)
}
func ClosureCallArgs4() {
@ -50,21 +50,21 @@ func ClosureCallArgs4() {
x := 0 // ERROR "moved to heap: x"
_ = func(p *int) *int { // ERROR "leaking param: p to result ~r1" "func literal does not escape"
return p
}(&x) // ERROR "&x escapes to heap"
}(&x)
}
func ClosureCallArgs5() {
x := 0 // ERROR "moved to heap: x"
sink = func(p *int) *int { // ERROR "leaking param: p to result ~r1" "func literal does not escape" "\(func literal\)\(&x\) escapes to heap"
return p
}(&x) // ERROR "&x escapes to heap"
}(&x)
}
func ClosureCallArgs6() {
x := 0 // ERROR "moved to heap: x"
func(p *int) { // ERROR "moved to heap: p" "func literal does not escape"
sink = &p // ERROR "&p escapes to heap"
}(&x) // ERROR "&x escapes to heap"
}(&x)
}
func ClosureCallArgs7() {
@ -73,7 +73,7 @@ func ClosureCallArgs7() {
x := 0 // ERROR "moved to heap: x"
func(p *int) { // ERROR "leaking param: p" "func literal does not escape"
pp = p
}(&x) // ERROR "&x escapes to heap"
}(&x)
}
_ = pp
}
@ -83,7 +83,7 @@ func ClosureCallArgs8() {
defer func(p *int) { // ERROR "p does not escape" "func literal does not escape"
*p = 1
// BAD: x should not escape to heap here
}(&x) // ERROR "&x escapes to heap"
}(&x)
}
func ClosureCallArgs9() {
@ -92,7 +92,7 @@ func ClosureCallArgs9() {
for {
defer func(p *int) { // ERROR "func literal escapes to heap" "p does not escape"
*p = 1
}(&x) // ERROR "&x escapes to heap"
}(&x)
}
}
@ -101,7 +101,7 @@ func ClosureCallArgs10() {
x := 0 // ERROR "moved to heap: x"
defer func(p *int) { // ERROR "func literal escapes to heap" "p does not escape"
*p = 1
}(&x) // ERROR "&x escapes to heap"
}(&x)
}
}
@ -109,7 +109,7 @@ func ClosureCallArgs11() {
x := 0 // ERROR "moved to heap: x"
defer func(p *int) { // ERROR "leaking param: p" "func literal does not escape"
sink = p // ERROR "p escapes to heap"
}(&x) // ERROR "&x escapes to heap"
}(&x)
}
func ClosureCallArgs12() {
@ -117,33 +117,33 @@ func ClosureCallArgs12() {
x := 0 // ERROR "moved to heap: x"
defer func(p *int) *int { // ERROR "leaking param: p to result ~r1" "func literal does not escape"
return p
}(&x) // ERROR "&x escapes to heap"
}(&x)
}
func ClosureCallArgs13() {
x := 0 // ERROR "moved to heap: x"
defer func(p *int) { // ERROR "moved to heap: p" "func literal does not escape"
sink = &p // ERROR "&p escapes to heap"
}(&x) // ERROR "&x escapes to heap"
}(&x)
}
func ClosureCallArgs14() {
x := 0 // ERROR "moved to heap: x"
// BAD: &x should not escape here
p := &x // ERROR "moved to heap: p" "&x escapes to heap"
p := &x // ERROR "moved to heap: p"
_ = func(p **int) *int { // ERROR "leaking param: p to result ~r1 level=1" "func literal does not escape"
return *p
// BAD: p should not escape here
}(&p) // ERROR "&p escapes to heap"
}(&p)
}
func ClosureCallArgs15() {
x := 0 // ERROR "moved to heap: x"
p := &x // ERROR "moved to heap: p" "&x escapes to heap"
p := &x // ERROR "moved to heap: p"
sink = func(p **int) *int { // ERROR "leaking param: p to result ~r1 level=1" "func literal does not escape" "\(func literal\)\(&p\) escapes to heap"
return *p
// BAD: p should not escape here
}(&p) // ERROR "&p escapes to heap"
}(&p)
}
func ClosureLeak1(s string) string { // ERROR "ClosureLeak1 s does not escape"

38
test/escape_field.go
View File

@ -23,7 +23,7 @@ type Y struct {
func field0() {
i := 0 // ERROR "moved to heap: i$"
var x X
x.p1 = &i // ERROR "&i escapes to heap$"
x.p1 = &i
sink = x.p1 // ERROR "x\.p1 escapes to heap"
}
@ -31,21 +31,21 @@ func field1() {
i := 0 // ERROR "moved to heap: i$"
var x X
// BAD: &i should not escape
x.p1 = &i // ERROR "&i escapes to heap$"
x.p1 = &i
sink = x.p2 // ERROR "x\.p2 escapes to heap"
}
func field3() {
i := 0 // ERROR "moved to heap: i$"
var x X
x.p1 = &i // ERROR "&i escapes to heap$"
x.p1 = &i
sink = x // ERROR "x escapes to heap"
}
func field4() {
i := 0 // ERROR "moved to heap: i$"
var y Y
y.x.p1 = &i // ERROR "&i escapes to heap$"
y.x.p1 = &i
x := y.x
sink = x // ERROR "x escapes to heap"
}
@ -54,7 +54,7 @@ func field5() {
i := 0 // ERROR "moved to heap: i$"
var x X
// BAD: &i should not escape here
x.a[0] = &i // ERROR "&i escapes to heap$"
x.a[0] = &i
sink = x.a[1] // ERROR "x\.a\[1\] escapes to heap"
}
@ -67,14 +67,14 @@ func field6a() {
i := 0 // ERROR "moved to heap: i$"
var x X
// BAD: &i should not escape
x.p1 = &i // ERROR "&i escapes to heap$"
field6(&x) // ERROR "field6a &x does not escape"
x.p1 = &i
field6(&x)
}
func field7() {
i := 0
var y Y
y.x.p1 = &i // ERROR "field7 &i does not escape$"
y.x.p1 = &i
x := y.x
var y1 Y
y1.x = x
@ -84,7 +84,7 @@ func field7() {
func field8() {
i := 0 // ERROR "moved to heap: i$"
var y Y
y.x.p1 = &i // ERROR "&i escapes to heap$"
y.x.p1 = &i
x := y.x
var y1 Y
y1.x = x
@ -94,7 +94,7 @@ func field8() {
func field9() {
i := 0 // ERROR "moved to heap: i$"
var y Y
y.x.p1 = &i // ERROR "&i escapes to heap$"
y.x.p1 = &i
x := y.x
var y1 Y
y1.x = x
@ -105,7 +105,7 @@ func field10() {
i := 0 // ERROR "moved to heap: i$"
var y Y
// BAD: &i should not escape
y.x.p1 = &i // ERROR "&i escapes to heap$"
y.x.p1 = &i
x := y.x
var y1 Y
y1.x = x
@ -114,33 +114,33 @@ func field10() {
func field11() {
i := 0 // ERROR "moved to heap: i$"
x := X{p1: &i} // ERROR "&i escapes to heap$"
x := X{p1: &i}
sink = x.p1 // ERROR "x\.p1 escapes to heap"
}
func field12() {
i := 0 // ERROR "moved to heap: i$"
// BAD: &i should not escape
x := X{p1: &i} // ERROR "&i escapes to heap$"
x := X{p1: &i}
sink = x.p2 // ERROR "x\.p2 escapes to heap"
}
func field13() {
i := 0 // ERROR "moved to heap: i$"
x := &X{p1: &i} // ERROR "&i escapes to heap$" "field13 &X literal does not escape$"
x := &X{p1: &i} // ERROR "field13 &X literal does not escape$"
sink = x.p1 // ERROR "x\.p1 escapes to heap"
}
func field14() {
i := 0 // ERROR "moved to heap: i$"
// BAD: &i should not escape
x := &X{p1: &i} // ERROR "&i escapes to heap$" "field14 &X literal does not escape$"
x := &X{p1: &i} // ERROR "field14 &X literal does not escape$"
sink = x.p2 // ERROR "x\.p2 escapes to heap"
}
func field15() {
i := 0 // ERROR "moved to heap: i$"
x := &X{p1: &i} // ERROR "&X literal escapes to heap$" "&i escapes to heap$"
x := &X{p1: &i} // ERROR "&X literal escapes to heap$"
sink = x // ERROR "x escapes to heap"
}
@ -148,7 +148,7 @@ func field16() {
i := 0 // ERROR "moved to heap: i$"
var x X
// BAD: &i should not escape
x.p1 = &i // ERROR "&i escapes to heap$"
x.p1 = &i
var iface interface{} = x // ERROR "x escapes to heap"
x1 := iface.(X)
sink = x1.p2 // ERROR "x1\.p2 escapes to heap"
@ -157,7 +157,7 @@ func field16() {
func field17() {
i := 0 // ERROR "moved to heap: i$"
var x X
x.p1 = &i // ERROR "&i escapes to heap$"
x.p1 = &i
var iface interface{} = x // ERROR "x escapes to heap"
x1 := iface.(X)
sink = x1.p1 // ERROR "x1\.p1 escapes to heap"
@ -167,7 +167,7 @@ func field18() {
i := 0 // ERROR "moved to heap: i$"
var x X
// BAD: &i should not escape
x.p1 = &i // ERROR "&i escapes to heap$"
x.p1 = &i
var iface interface{} = x // ERROR "x escapes to heap"
y, _ := iface.(Y) // Put X, but extracted Y. The cast will fail, so y is zero initialized.
sink = y // ERROR "y escapes to heap"

54
test/escape_iface.go
View File

@ -32,26 +32,26 @@ func (M0) M() {
func efaceEscape0() {
{
i := 0
v := M0{&i} // ERROR "&i does not escape"
v := M0{&i}
var x M = v // ERROR "v does not escape"
_ = x
}
{
i := 0 // ERROR "moved to heap: i"
v := M0{&i} // ERROR "&i escapes to heap"
v := M0{&i}
var x M = v // ERROR "v escapes to heap"
sink = x // ERROR "x escapes to heap"
}
{
i := 0
v := M0{&i} // ERROR "&i does not escape"
v := M0{&i}
var x M = v // ERROR "v does not escape"
v1 := x.(M0)
_ = v1
}
{
i := 0 // ERROR "moved to heap: i"
v := M0{&i} // ERROR "&i escapes to heap"
v := M0{&i}
// BAD: v does not escape to heap here
var x M = v // ERROR "v escapes to heap"
v1 := x.(M0)
@ -59,20 +59,20 @@ func efaceEscape0() {
}
{
i := 0 // ERROR "moved to heap: i"
v := M0{&i} // ERROR "&i escapes to heap"
v := M0{&i}
// BAD: v does not escape to heap here
var x M = v // ERROR "v escapes to heap"
x.M()
}
{
i := 0 // ERROR "moved to heap: i"
v := M0{&i} // ERROR "&i escapes to heap"
v := M0{&i}
var x M = v // ERROR "v escapes to heap"
mescapes(x)
}
{
i := 0
v := M0{&i} // ERROR "&i does not escape"
v := M0{&i}
var x M = v // ERROR "v does not escape"
mdoesnotescape(x)
}
@ -90,26 +90,26 @@ func (M1) M() {
func efaceEscape1() {
{
i := 0
v := M1{&i, 0} // ERROR "&i does not escape"
v := M1{&i, 0}
var x M = v // ERROR "v does not escape"
_ = x
}
{
i := 0 // ERROR "moved to heap: i"
v := M1{&i, 0} // ERROR "&i escapes to heap"
v := M1{&i, 0}
var x M = v // ERROR "v escapes to heap"
sink = x // ERROR "x escapes to heap"
}
{
i := 0
v := M1{&i, 0} // ERROR "&i does not escape"
v := M1{&i, 0}
var x M = v // ERROR "v does not escape"
v1 := x.(M1)
_ = v1
}
{
i := 0 // ERROR "moved to heap: i"
v := M1{&i, 0} // ERROR "&i escapes to heap"
v := M1{&i, 0}
// BAD: v does not escape to heap here
var x M = v // ERROR "v escapes to heap"
v1 := x.(M1)
@ -117,20 +117,20 @@ func efaceEscape1() {
}
{
i := 0 // ERROR "moved to heap: i"
v := M1{&i, 0} // ERROR "&i escapes to heap"
v := M1{&i, 0}
// BAD: v does not escape to heap here
var x M = v // ERROR "v escapes to heap"
x.M()
}
{
i := 0 // ERROR "moved to heap: i"
v := M1{&i, 0} // ERROR "&i escapes to heap"
v := M1{&i, 0}
var x M = v // ERROR "v escapes to heap"
mescapes(x)
}
{
i := 0
v := M1{&i, 0} // ERROR "&i does not escape"
v := M1{&i, 0}
var x M = v // ERROR "v does not escape"
mdoesnotescape(x)
}
@ -147,26 +147,26 @@ func (*M2) M() {
func efaceEscape2() {
{
i := 0
v := &M2{&i} // ERROR "&i does not escape" "&M2 literal does not escape"
v := &M2{&i} // ERROR "&M2 literal does not escape"
var x M = v // ERROR "v does not escape"
_ = x
}
{
i := 0 // ERROR "moved to heap: i"
v := &M2{&i} // ERROR "&i escapes to heap" "&M2 literal escapes to heap"
v := &M2{&i} // ERROR "&M2 literal escapes to heap"
var x M = v // ERROR "v escapes to heap"
sink = x // ERROR "x escapes to heap"
}
{
i := 0
v := &M2{&i} // ERROR "&i does not escape" "&M2 literal does not escape"
v := &M2{&i} // ERROR "&M2 literal does not escape"
var x M = v // ERROR "v does not escape"
v1 := x.(*M2)
_ = v1
}
{
i := 0 // ERROR "moved to heap: i"
v := &M2{&i} // ERROR "&i escapes to heap" "&M2 literal escapes to heap"
v := &M2{&i} // ERROR "&M2 literal escapes to heap"
// BAD: v does not escape to heap here
var x M = v // ERROR "v escapes to heap"
v1 := x.(*M2)
@ -174,7 +174,7 @@ func efaceEscape2() {
}
{
i := 0 // ERROR "moved to heap: i"
v := &M2{&i} // ERROR "&i escapes to heap" "&M2 literal does not escape"
v := &M2{&i} // ERROR "&M2 literal does not escape"
// BAD: v does not escape to heap here
var x M = v // ERROR "v does not escape"
v1 := x.(*M2)
@ -182,7 +182,7 @@ func efaceEscape2() {
}
{
i := 0 // ERROR "moved to heap: i"
v := &M2{&i} // ERROR "&i escapes to heap" "&M2 literal does not escape"
v := &M2{&i} // ERROR "&M2 literal does not escape"
// BAD: v does not escape to heap here
var x M = v // ERROR "v does not escape"
v1, ok := x.(*M2)
@ -191,20 +191,20 @@ func efaceEscape2() {
}
{
i := 0 // ERROR "moved to heap: i"
v := &M2{&i} // ERROR "&i escapes to heap" "&M2 literal escapes to heap"
v := &M2{&i} // ERROR "&M2 literal escapes to heap"
// BAD: v does not escape to heap here
var x M = v // ERROR "v escapes to heap"
x.M()
}
{
i := 0 // ERROR "moved to heap: i"
v := &M2{&i} // ERROR "&i escapes to heap" "&M2 literal escapes to heap"
v := &M2{&i} // ERROR "&M2 literal escapes to heap"
var x M = v // ERROR "v escapes to heap"
mescapes(x)
}
{
i := 0
v := &M2{&i} // ERROR "&i does not escape" "&M2 literal does not escape"
v := &M2{&i} // ERROR "&M2 literal does not escape"
var x M = v // ERROR "v does not escape"
mdoesnotescape(x)
}
@ -235,8 +235,8 @@ func dotTypeEscape2() { // #13805, #15796
var x interface{} = i // ERROR "i does not escape"
var y interface{} = j // ERROR "j does not escape"
*(&v) = x.(int) // ERROR "&v does not escape"
*(&v), *(&ok) = y.(int) // ERROR "&v does not escape" "&ok does not escape"
*(&v) = x.(int)
*(&v), *(&ok) = y.(int)
}
{
i := 0
@ -246,7 +246,7 @@ func dotTypeEscape2() { // #13805, #15796
var y interface{} = j // ERROR "j does not escape"
sink = x.(int) // ERROR "x.\(int\) escapes to heap"
sink, *(&ok) = y.(int) // ERROR "&ok does not escape"
sink, *(&ok) = y.(int)
}
{
i := 0 // ERROR "moved to heap: i"
@ -256,6 +256,6 @@ func dotTypeEscape2() { // #13805, #15796
var y interface{} = &j // ERROR "&j escapes to heap"
sink = x.(*int) // ERROR "x.\(\*int\) escapes to heap"
sink, *(&ok) = y.(*int) // ERROR "&ok does not escape"
sink, *(&ok) = y.(*int)
}
}

40
test/escape_indir.go
View File

@ -25,42 +25,42 @@ func constptr0() {
i := 0 // ERROR "moved to heap: i"
x := &ConstPtr{} // ERROR "&ConstPtr literal does not escape"
// BAD: i should not escape here
x.p = &i // ERROR "&i escapes to heap"
x.p = &i
_ = x
}
func constptr01() *ConstPtr {
i := 0 // ERROR "moved to heap: i"
x := &ConstPtr{} // ERROR "&ConstPtr literal escapes to heap"
x.p = &i // ERROR "&i escapes to heap"
x.p = &i
return x
}
func constptr02() ConstPtr {
i := 0 // ERROR "moved to heap: i"
x := &ConstPtr{} // ERROR "&ConstPtr literal does not escape"
x.p = &i // ERROR "&i escapes to heap"
x.p = &i
return *x
}
func constptr03() **ConstPtr {
i := 0 // ERROR "moved to heap: i"
x := &ConstPtr{} // ERROR "&ConstPtr literal escapes to heap" "moved to heap: x"
x.p = &i // ERROR "&i escapes to heap"
return &x // ERROR "&x escapes to heap"
x.p = &i
return &x
}
func constptr1() {
i := 0 // ERROR "moved to heap: i"
x := &ConstPtr{} // ERROR "&ConstPtr literal escapes to heap"
x.p = &i // ERROR "&i escapes to heap"
x.p = &i
sink = x // ERROR "x escapes to heap"
}
func constptr2() {
i := 0 // ERROR "moved to heap: i"
x := &ConstPtr{} // ERROR "&ConstPtr literal does not escape"
x.p = &i // ERROR "&i escapes to heap"
x.p = &i
sink = *x // ERROR "\*x escapes to heap"
}
@ -87,15 +87,15 @@ func constptr6(p *ConstPtr) { // ERROR "leaking param content: p"
func constptr7() **ConstPtr {
p := new(ConstPtr) // ERROR "new\(ConstPtr\) escapes to heap" "moved to heap: p"
var tmp ConstPtr2
p1 := &tmp // ERROR "&tmp does not escape"
p1 := &tmp
p.c = *p1
return &p // ERROR "&p escapes to heap"
return &p
}
func constptr8() *ConstPtr {
p := new(ConstPtr) // ERROR "new\(ConstPtr\) escapes to heap"
var tmp ConstPtr2
p.c = *&tmp // ERROR "&tmp does not escape"
p.c = *&tmp
return p
}
@ -103,7 +103,7 @@ func constptr9() ConstPtr {
p := new(ConstPtr) // ERROR "new\(ConstPtr\) does not escape"
var p1 ConstPtr2
i := 0 // ERROR "moved to heap: i"
p1.p = &i // ERROR "&i escapes to heap"
p1.p = &i
p.c = p1
return *p
}
@ -112,9 +112,9 @@ func constptr10() ConstPtr {
x := &ConstPtr{} // ERROR "moved to heap: x" "&ConstPtr literal escapes to heap"
i := 0 // ERROR "moved to heap: i"
var p *ConstPtr
p = &ConstPtr{p: &i, x: &x} // ERROR "&i escapes to heap" "&x escapes to heap" "&ConstPtr literal does not escape"
p = &ConstPtr{p: &i, x: &x} // ERROR "&ConstPtr literal does not escape"
var pp **ConstPtr
pp = &p // ERROR "&p does not escape"
pp = &p
return **pp
}
@ -122,7 +122,7 @@ func constptr11() *ConstPtr {
i := 0 // ERROR "moved to heap: i"
p := new(ConstPtr) // ERROR "new\(ConstPtr\) escapes to heap"
p1 := &ConstPtr{} // ERROR "&ConstPtr literal does not escape"
p1.p = &i // ERROR "&i escapes to heap"
p1.p = &i
*p = *p1
return p
}
@ -130,13 +130,13 @@ func constptr11() *ConstPtr {
func foo(p **int) { // ERROR "foo p does not escape"
i := 0 // ERROR "moved to heap: i"
y := p
*y = &i // ERROR "&i escapes to heap"
*y = &i
}
func foo1(p *int) { // ERROR "p does not escape"
i := 0 // ERROR "moved to heap: i"
y := &p // ERROR "&p does not escape"
*y = &i // ERROR "&i escapes to heap"
y := &p
*y = &i
}
func foo2() {
@ -146,15 +146,15 @@ func foo2() {
x := new(int) // ERROR "moved to heap: x" "new\(int\) escapes to heap"
sink = &x // ERROR "&x escapes to heap"
var z Z
z.f = &x // ERROR "&x does not escape"
z.f = &x
p := z.f
i := 0 // ERROR "moved to heap: i"
*p = &i // ERROR "&i escapes to heap"
*p = &i
}
var global *byte
func f() {
var x byte // ERROR "moved to heap: x"
global = &*&x // ERROR "&\(\*\(&x\)\) escapes to heap" "&x escapes to heap"
global = &*&x
}

56
test/escape_level.go
View File

@ -12,64 +12,64 @@ var sink interface{}
func level0() {
i := 0 // ERROR "moved to heap: i"
p0 := &i // ERROR "moved to heap: p0" "&i escapes to heap"
p1 := &p0 // ERROR "moved to heap: p1" "&p0 escapes to heap"
p2 := &p1 // ERROR "moved to heap: p2" "&p1 escapes to heap"
p0 := &i // ERROR "moved to heap: p0"
p1 := &p0 // ERROR "moved to heap: p1"
p2 := &p1 // ERROR "moved to heap: p2"
sink = &p2 // ERROR "&p2 escapes to heap"
}
func level1() {
i := 0 // ERROR "moved to heap: i"
p0 := &i // ERROR "moved to heap: p0" "&i escapes to heap"
p1 := &p0 // ERROR "moved to heap: p1" "&p0 escapes to heap"
p2 := &p1 // ERROR "&p1 escapes to heap"
p0 := &i // ERROR "moved to heap: p0"
p1 := &p0 // ERROR "moved to heap: p1"
p2 := &p1
sink = p2 // ERROR "p2 escapes to heap"
}
func level2() {
i := 0 // ERROR "moved to heap: i"
p0 := &i // ERROR "moved to heap: p0" "&i escapes to heap"
p1 := &p0 // ERROR "&p0 escapes to heap"
p2 := &p1 // ERROR "&p1 does not escape"
p0 := &i // ERROR "moved to heap: p0"
p1 := &p0
p2 := &p1
sink = *p2 // ERROR "\*p2 escapes to heap"
}
func level3() {
i := 0 // ERROR "moved to heap: i"
p0 := &i // ERROR "&i escapes to heap"
p1 := &p0 // ERROR "&p0 does not escape"
p2 := &p1 // ERROR "&p1 does not escape"
p0 := &i
p1 := &p0
p2 := &p1
sink = **p2 // ERROR "\* \(\*p2\) escapes to heap"
}
func level4() {
i := 0 // ERROR "moved to heap: i"
p0 := &i // ERROR "moved to heap: p0" "&i escapes to heap"
p1 := &p0 // ERROR "&p0 escapes to heap"
p0 := &i // ERROR "moved to heap: p0"
p1 := &p0
p2 := p1 // ERROR "moved to heap: p2"
sink = &p2 // ERROR "&p2 escapes to heap"
}
func level5() {
i := 0 // ERROR "moved to heap: i"
p0 := &i // ERROR "moved to heap: p0" "&i escapes to heap"
p1 := &p0 // ERROR "&p0 escapes to heap"
p0 := &i // ERROR "moved to heap: p0"
p1 := &p0
p2 := p1
sink = p2 // ERROR "p2 escapes to heap"
}
func level6() {
i := 0 // ERROR "moved to heap: i"
p0 := &i // ERROR "&i escapes to heap"
p1 := &p0 // ERROR "&p0 does not escape"
p0 := &i
p1 := &p0
p2 := p1
sink = *p2 // ERROR "\*p2 escapes to heap"
}
func level7() {
i := 0 // ERROR "moved to heap: i"
p0 := &i // ERROR "&i escapes to heap"
p1 := &p0 // ERROR "&p0 does not escape"
p0 := &i
p1 := &p0
// note *p1 == &i
p2 := *p1 // ERROR "moved to heap: p2"
sink = &p2 // ERROR "&p2 escapes to heap"
@ -77,32 +77,32 @@ func level7() {
func level8() {
i := 0 // ERROR "moved to heap: i"
p0 := &i // ERROR "&i escapes to heap"
p1 := &p0 // ERROR "&p0 does not escape"
p0 := &i
p1 := &p0
p2 := *p1
sink = p2 // ERROR "p2 escapes to heap"
}
func level9() {
i := 0
p0 := &i // ERROR "&i does not escape"
p1 := &p0 // ERROR "&p0 does not escape"
p0 := &i
p1 := &p0
p2 := *p1
sink = *p2 // ERROR "\*p2 escapes to heap"
}
func level10() {
i := 0
p0 := &i // ERROR "&i does not escape"
p0 := &i
p1 := *p0
p2 := &p1 // ERROR "&p1 does not escape"
p2 := &p1
sink = *p2 // ERROR "\*p2 escapes to heap"
}
func level11() {
i := 0
p0 := &i // ERROR "&i does not escape"
p1 := &p0 // ERROR "&p0 does not escape"
p0 := &i
p1 := &p0
p2 := **p1 // ERROR "moved to heap: p2"
sink = &p2 // ERROR "&p2 escapes to heap"
}

22
test/escape_map.go
View File

@ -16,7 +16,7 @@ func map0() {
i := 0 // ERROR "moved to heap: i"
// BAD: j should not escape
j := 0 // ERROR "moved to heap: j"
m[&i] = &j // ERROR "&i escapes to heap" "&j escapes to heap"
m[&i] = &j
_ = m
}
@ -25,15 +25,15 @@ func map1() *int {
// BAD: i should not escape
i := 0 // ERROR "moved to heap: i"
j := 0 // ERROR "moved to heap: j"
m[&i] = &j // ERROR "&i escapes to heap" "&j escapes to heap"
return m[&i] // ERROR "&i does not escape"
m[&i] = &j
return m[&i]
}
func map2() map[*int]*int {
m := make(map[*int]*int) // ERROR "make\(map\[\*int\]\*int\) escapes to heap"
i := 0 // ERROR "moved to heap: i"
j := 0 // ERROR "moved to heap: j"
m[&i] = &j // ERROR "&i escapes to heap" "&j escapes to heap"
m[&i] = &j
return m
}
@ -42,7 +42,7 @@ func map3() []*int {
i := 0 // ERROR "moved to heap: i"
// BAD: j should not escape
j := 0 // ERROR "moved to heap: j"
m[&i] = &j // ERROR "&i escapes to heap" "&j escapes to heap"
m[&i] = &j
var r []*int
for k := range m {
r = append(r, k)
@ -55,7 +55,7 @@ func map4() []*int {
// BAD: i should not escape
i := 0 // ERROR "moved to heap: i"
j := 0 // ERROR "moved to heap: j"
m[&i] = &j // ERROR "&i escapes to heap" "&j escapes to heap"
m[&i] = &j
var r []*int
for k, v := range m {
// We want to test exactly "for k, v := range m" rather than "for _, v := range m".
@ -70,7 +70,7 @@ func map4() []*int {
func map5(m map[*int]*int) { // ERROR "m does not escape"
i := 0 // ERROR "moved to heap: i"
j := 0 // ERROR "moved to heap: j"
m[&i] = &j // ERROR "&i escapes to heap" "&j escapes to heap"
m[&i] = &j
}
func map6(m map[*int]*int) { // ERROR "m does not escape"
@ -79,7 +79,7 @@ func map6(m map[*int]*int) { // ERROR "m does not escape"
}
i := 0 // ERROR "moved to heap: i"
j := 0 // ERROR "moved to heap: j"
m[&i] = &j // ERROR "&i escapes to heap" "&j escapes to heap"
m[&i] = &j
}
func map7() {
@ -87,14 +87,14 @@ func map7() {
i := 0 // ERROR "moved to heap: i"
// BAD: j should not escape
j := 0 // ERROR "moved to heap: j"
m := map[*int]*int{&i: &j} // ERROR "&i escapes to heap" "&j escapes to heap" "literal does not escape"
m := map[*int]*int{&i: &j} // ERROR "literal does not escape"
_ = m
}
func map8() {
i := 0 // ERROR "moved to heap: i"
j := 0 // ERROR "moved to heap: j"
m := map[*int]*int{&i: &j} // ERROR "&i escapes to heap" "&j escapes to heap" "literal escapes to heap"
m := map[*int]*int{&i: &j} // ERROR "literal escapes to heap"
sink = m // ERROR "m escapes to heap"
}
@ -102,6 +102,6 @@ func map9() *int {
// BAD: i should not escape
i := 0 // ERROR "moved to heap: i"
j := 0 // ERROR "moved to heap: j"
m := map[*int]*int{&i: &j} // ERROR "&i escapes to heap" "&j escapes to heap" "literal does not escape"
m := map[*int]*int{&i: &j} // ERROR "literal does not escape"
return m[nil]
}

132
test/escape_param.go
View File

@ -22,12 +22,12 @@ func param0(p *int) *int { // ERROR "leaking param: p to result ~r1"
func caller0a() {
i := 0
_ = param0(&i) // ERROR "caller0a &i does not escape$"
_ = param0(&i)
}
func caller0b() {
i := 0 // ERROR "moved to heap: i$"
sink = param0(&i) // ERROR "&i escapes to heap$" "param0\(&i\) escapes to heap"
sink = param0(&i) // ERROR "param0\(&i\) escapes to heap"
}
// in, in -> out, out
@ -38,7 +38,7 @@ func param1(p1, p2 *int) (*int, *int) { // ERROR "leaking param: p1 to result ~r
func caller1() {
i := 0 // ERROR "moved to heap: i$"
j := 0
sink, _ = param1(&i, &j) // ERROR "&i escapes to heap$" "caller1 &j does not escape$"
sink, _ = param1(&i, &j)
}
// in -> other in
@ -49,14 +49,14 @@ func param2(p1 *int, p2 **int) { // ERROR "leaking param: p1$" "param2 p2 does n
func caller2a() {
i := 0 // ERROR "moved to heap: i$"
var p *int
param2(&i, &p) // ERROR "&i escapes to heap$" "caller2a &p does not escape$"
param2(&i, &p)
_ = p
}
func caller2b() {
i := 0 // ERROR "moved to heap: i$"
var p *int
param2(&i, &p) // ERROR "&i escapes to heap$" "caller2b &p does not escape$"
param2(&i, &p)
sink = p // ERROR "p escapes to heap$"
}
@ -144,16 +144,16 @@ func param3(p *Pair) { // ERROR "param3 p does not escape"
func caller3a() {
i := 0
j := 0
p := Pair{&i, &j} // ERROR "caller3a &i does not escape" "caller3a &j does not escape"
param3(&p) // ERROR "caller3a &p does not escape"
p := Pair{&i, &j}
param3(&p)
_ = p
}
func caller3b() {
i := 0 // ERROR "moved to heap: i$"
j := 0 // ERROR "moved to heap: j$"
p := Pair{&i, &j} // ERROR "&i escapes to heap$" "&j escapes to heap$"
param3(&p) // ERROR "caller3b &p does not escape"
p := Pair{&i, &j}
param3(&p)
sink = p // ERROR "p escapes to heap$"
}
@ -165,14 +165,14 @@ func (p *Pair) param4(i *int) { // ERROR "\(\*Pair\).param4 p does not escape$"
func caller4a() {
i := 0 // ERROR "moved to heap: i$"
p := Pair{}
p.param4(&i) // ERROR "&i escapes to heap$" "caller4a p does not escape$"
p.param4(&i)
_ = p
}
func caller4b() {
i := 0 // ERROR "moved to heap: i$"
p := Pair{}
p.param4(&i) // ERROR "&i escapes to heap$" "caller4b p does not escape$"
p.param4(&i)
sink = p // ERROR "p escapes to heap$"
}
@ -183,7 +183,7 @@ func param5(i *int) { // ERROR "leaking param: i$"
func caller5() {
i := 0 // ERROR "moved to heap: i$"
param5(&i) // ERROR "&i escapes to heap$"
param5(&i)
}
// *in -> heap
@ -193,9 +193,9 @@ func param6(i ***int) { // ERROR "leaking param content: i$"
func caller6a() {
i := 0 // ERROR "moved to heap: i$"
p := &i // ERROR "&i escapes to heap$" "moved to heap: p$"
p2 := &p // ERROR "&p escapes to heap$"
param6(&p2) // ERROR "caller6a &p2 does not escape"
p := &i // ERROR "moved to heap: p$"
p2 := &p
param6(&p2)
}
// **in -> heap
@ -205,9 +205,9 @@ func param7(i ***int) { // ERROR "leaking param content: i$"
func caller7() {
i := 0 // ERROR "moved to heap: i$"
p := &i // ERROR "&i escapes to heap$" "moved to heap: p$"
p2 := &p // ERROR "&p escapes to heap$"
param7(&p2) // ERROR "caller7 &p2 does not escape"
p := &i // ERROR "moved to heap: p$"
p2 := &p
param7(&p2)
}
// **in -> heap
@ -217,8 +217,8 @@ func param8(i **int) { // ERROR "param8 i does not escape$"
func caller8() {
i := 0
p := &i // ERROR "caller8 &i does not escape$"
param8(&p) // ERROR "caller8 &p does not escape$"
p := &i
param8(&p)
}
// *in -> out
@ -228,16 +228,16 @@ func param9(p ***int) **int { // ERROR "leaking param: p to result ~r1 level=1"
func caller9a() {
i := 0
p := &i // ERROR "caller9a &i does not escape"
p2 := &p // ERROR "caller9a &p does not escape"
_ = param9(&p2) // ERROR "caller9a &p2 does not escape$"
p := &i
p2 := &p
_ = param9(&p2)
}
func caller9b() {
i := 0 // ERROR "moved to heap: i$"
p := &i // ERROR "&i escapes to heap$" "moved to heap: p$"
p2 := &p // ERROR "&p escapes to heap$"
sink = param9(&p2) // ERROR "caller9b &p2 does not escape$" "param9\(&p2\) escapes to heap"
p := &i // ERROR "moved to heap: p$"
p2 := &p
sink = param9(&p2) // ERROR "param9\(&p2\) escapes to heap"
}
// **in -> out
@ -247,45 +247,45 @@ func param10(p ***int) *int { // ERROR "leaking param: p to result ~r1 level=2"
func caller10a() {
i := 0
p := &i // ERROR "caller10a &i does not escape"
p2 := &p // ERROR "caller10a &p does not escape"
_ = param10(&p2) // ERROR "caller10a &p2 does not escape$"
p := &i
p2 := &p
_ = param10(&p2)
}
func caller10b() {
i := 0 // ERROR "moved to heap: i$"
p := &i // ERROR "&i escapes to heap$"
p2 := &p // ERROR "caller10b &p does not escape$"
sink = param10(&p2) // ERROR "caller10b &p2 does not escape$" "param10\(&p2\) escapes to heap"
p := &i
p2 := &p
sink = param10(&p2) // ERROR "param10\(&p2\) escapes to heap"
}
// in escapes to heap (address of param taken and returned)
func param11(i **int) ***int { // ERROR "moved to heap: i$"
return &i // ERROR "&i escapes to heap$"
return &i
}
func caller11a() {
i := 0 // ERROR "moved to heap: i"
p := &i // ERROR "moved to heap: p" "&i escapes to heap"
_ = param11(&p) // ERROR "&p escapes to heap"
p := &i // ERROR "moved to heap: p"
_ = param11(&p)
}
func caller11b() {
i := 0 // ERROR "moved to heap: i$"
p := &i // ERROR "&i escapes to heap$" "moved to heap: p$"
sink = param11(&p) // ERROR "&p escapes to heap$" "param11\(&p\) escapes to heap"
p := &i // ERROR "moved to heap: p$"
sink = param11(&p) // ERROR "param11\(&p\) escapes to heap"
}
func caller11c() { // GOOD
i := 0 // ERROR "moved to heap: i$"
p := &i // ERROR "moved to heap: p" "&i escapes to heap"
sink = *param11(&p) // ERROR "&p escapes to heap" "\*param11\(&p\) escapes to heap"
p := &i // ERROR "moved to heap: p"
sink = *param11(&p) // ERROR "\*param11\(&p\) escapes to heap"
}
func caller11d() {
i := 0 // ERROR "moved to heap: i$"
p := &i // ERROR "&i escapes to heap" "moved to heap: p"
p2 := &p // ERROR "&p escapes to heap"
p := &i // ERROR "moved to heap: p"
p2 := &p
sink = param11(p2) // ERROR "param11\(p2\) escapes to heap"
}
@ -295,38 +295,38 @@ type Indir struct {
}
func (r *Indir) param12(i **int) { // ERROR "\(\*Indir\).param12 r does not escape$" "moved to heap: i$"
r.p = &i // ERROR "&i escapes to heap$"
r.p = &i
}
func caller12a() {
i := 0 // ERROR "moved to heap: i$"
p := &i // ERROR "&i escapes to heap$" "moved to heap: p$"
p := &i // ERROR "moved to heap: p$"
var r Indir
r.param12(&p) // ERROR "&p escapes to heap$" "caller12a r does not escape$"
r.param12(&p)
_ = r
}
func caller12b() {
i := 0 // ERROR "moved to heap: i$"
p := &i // ERROR "&i escapes to heap$" "moved to heap: p$"
p := &i // ERROR "moved to heap: p$"
r := &Indir{} // ERROR "caller12b &Indir literal does not escape$"
r.param12(&p) // ERROR "&p escapes to heap$"
r.param12(&p)
_ = r
}
func caller12c() {
i := 0 // ERROR "moved to heap: i$"
p := &i // ERROR "&i escapes to heap$" "moved to heap: p$"
p := &i // ERROR "moved to heap: p$"
r := Indir{}
r.param12(&p) // ERROR "&p escapes to heap$" "caller12c r does not escape$"
r.param12(&p)
sink = r // ERROR "r escapes to heap$"
}
func caller12d() {
i := 0 // ERROR "moved to heap: i$"
p := &i // ERROR "&i escapes to heap$" "moved to heap: p$"
p := &i // ERROR "moved to heap: p$"
r := Indir{}
r.param12(&p) // ERROR "&p escapes to heap$" "caller12d r does not escape$"
r.param12(&p)
sink = **r.p // ERROR "\* \(\*r\.p\) escapes to heap"
}
@ -343,24 +343,24 @@ func caller13a() {
i := 0 // ERROR "moved to heap: i$"
var p *int
var v Val
v.p = &p // ERROR "caller13a &p does not escape$"
v.param13(&i) // ERROR "&i escapes to heap$"
v.p = &p
v.param13(&i)
_ = v
}
func caller13b() {
i := 0 // ERROR "moved to heap: i$"
var p *int
v := Val{&p} // ERROR "caller13b &p does not escape$"
v.param13(&i) // ERROR "&i escapes to heap$"
v := Val{&p}
v.param13(&i)
_ = v
}
func caller13c() {
i := 0 // ERROR "moved to heap: i$"
var p *int
v := &Val{&p} // ERROR "caller13c &Val literal does not escape$" "caller13c &p does not escape$"
v.param13(&i) // ERROR "&i escapes to heap$"
v := &Val{&p} // ERROR "caller13c &Val literal does not escape$"
v.param13(&i)
_ = v
}
@ -368,40 +368,40 @@ func caller13d() {
i := 0 // ERROR "moved to heap: i$"
var p *int // ERROR "moved to heap: p$"
var v Val
v.p = &p // ERROR "&p escapes to heap$"
v.param13(&i) // ERROR "&i escapes to heap$"
v.p = &p
v.param13(&i)
sink = v // ERROR "v escapes to heap$"
}
func caller13e() {
i := 0 // ERROR "moved to heap: i$"
var p *int // ERROR "moved to heap: p$"
v := Val{&p} // ERROR "&p escapes to heap$"
v.param13(&i) // ERROR "&i escapes to heap$"
v := Val{&p}
v.param13(&i)
sink = v // ERROR "v escapes to heap$"
}
func caller13f() {
i := 0 // ERROR "moved to heap: i$"
var p *int // ERROR "moved to heap: p$"
v := &Val{&p} // ERROR "&Val literal escapes to heap$" "&p escapes to heap$"
v.param13(&i) // ERROR "&i escapes to heap$"
v := &Val{&p} // ERROR "&Val literal escapes to heap$"
v.param13(&i)
sink = v // ERROR "v escapes to heap$"
}
func caller13g() {
i := 0 // ERROR "moved to heap: i$"
var p *int
v := Val{&p} // ERROR "caller13g &p does not escape$"
v.param13(&i) // ERROR "&i escapes to heap$"
v := Val{&p}
v.param13(&i)
sink = *v.p // ERROR "\*v\.p escapes to heap"
}
func caller13h() {
i := 0 // ERROR "moved to heap: i$"
var p *int
v := &Val{&p} // ERROR "caller13h &Val literal does not escape$" "caller13h &p does not escape$"
v.param13(&i) // ERROR "&i escapes to heap$"
v := &Val{&p} // ERROR "caller13h &Val literal does not escape$"
v.param13(&i)
sink = **v.p // ERROR "\* \(\*v\.p\) escapes to heap"
}

22
test/escape_slice.go
View File

@ -19,28 +19,28 @@ func slice0() {
var s []*int
// BAD: i should not escape
i := 0 // ERROR "moved to heap: i"
s = append(s, &i) // ERROR "&i escapes to heap"
s = append(s, &i)
_ = s
}
func slice1() *int {
var s []*int
i := 0 // ERROR "moved to heap: i"
s = append(s, &i) // ERROR "&i escapes to heap"
s = append(s, &i)
return s[0]
}
func slice2() []*int {
var s []*int
i := 0 // ERROR "moved to heap: i"
s = append(s, &i) // ERROR "&i escapes to heap"
s = append(s, &i)
return s
}
func slice3() *int {
var s []*int
i := 0 // ERROR "moved to heap: i"
s = append(s, &i) // ERROR "&i escapes to heap"
s = append(s, &i)
for _, p := range s {
return p
}
@ -49,7 +49,7 @@ func slice3() *int {
func slice4(s []*int) { // ERROR "s does not escape"
i := 0 // ERROR "moved to heap: i"
s[0] = &i // ERROR "&i escapes to heap"
s[0] = &i
}
func slice5(s []*int) { // ERROR "s does not escape"
@ -57,39 +57,39 @@ func slice5(s []*int) { // ERROR "s does not escape"
s = make([]*int, 10) // ERROR "make\(\[\]\*int, 10\) does not escape"
}
i := 0 // ERROR "moved to heap: i"
s[0] = &i // ERROR "&i escapes to heap"
s[0] = &i
}
func slice6() {
s := make([]*int, 10) // ERROR "make\(\[\]\*int, 10\) does not escape"
// BAD: i should not escape
i := 0 // ERROR "moved to heap: i"
s[0] = &i // ERROR "&i escapes to heap"
s[0] = &i
_ = s
}
func slice7() *int {
s := make([]*int, 10) // ERROR "make\(\[\]\*int, 10\) does not escape"
i := 0 // ERROR "moved to heap: i"
s[0] = &i // ERROR "&i escapes to heap"
s[0] = &i
return s[0]
}
func slice8() {
i := 0
s := []*int{&i} // ERROR "&i does not escape" "literal does not escape"
s := []*int{&i} // ERROR "literal does not escape"
_ = s
}
func slice9() *int {
i := 0 // ERROR "moved to heap: i"
s := []*int{&i} // ERROR "&i escapes to heap" "literal does not escape"
s := []*int{&i} // ERROR "literal does not escape"
return s[0]
}
func slice10() []*int {
i := 0 // ERROR "moved to heap: i"
s := []*int{&i} // ERROR "&i escapes to heap" "literal escapes to heap"
s := []*int{&i} // ERROR "literal escapes to heap"
return s
}

144
test/escape_struct_param1.go
View File

@ -36,16 +36,16 @@ func (u *U) SPPi() *string { // ERROR "leaking param: u to result ~r0 level=2$"
func tSPPi() {
s := "cat" // ERROR "moved to heap: s$"
ps := &s // ERROR "&s escapes to heap$"
pps := &ps // ERROR "tSPPi &ps does not escape$"
ps := &s
pps := &ps
pu := &U{ps, pps} // ERROR "tSPPi &U literal does not escape$"
Ssink = pu.SPPi()
}
func tiSPP() {
s := "cat" // ERROR "moved to heap: s$"
ps := &s // ERROR "&s escapes to heap$"
pps := &ps // ERROR "tiSPP &ps does not escape$"
ps := &s
pps := &ps
pu := &U{ps, pps} // ERROR "tiSPP &U literal does not escape$"
Ssink = *pu.SPP()
}
@ -53,8 +53,8 @@ func tiSPP() {
// BAD: need fine-grained (field-sensitive) analysis to avoid spurious escape of ps
func tSP() {
s := "cat" // ERROR "moved to heap: s$"
ps := &s // ERROR "&s escapes to heap$" "moved to heap: ps$"
pps := &ps // ERROR "&ps escapes to heap$"
ps := &s // ERROR "moved to heap: ps$"
pps := &ps
pu := &U{ps, pps} // ERROR "tSP &U literal does not escape$"
Ssink = pu.SP()
}
@ -92,7 +92,7 @@ func (v *V) USPPia() *string { // ERROR "leaking param: v to result ~r0 level=2$
}
func (v *V) USPPib() *string { // ERROR "leaking param: v to result ~r0 level=2$"
return v._u.SPPi() // ERROR "\(\*V\).USPPib v._u does not escape$"
return v._u.SPPi()
}
func (v *V) UPiSPa() *string { // ERROR "leaking param: v to result ~r0 level=2$"
@ -119,13 +119,13 @@ func tUPiSPa() {
s4 := "dog" // ERROR "moved to heap: s4$"
s5 := "emu" // ERROR "moved to heap: s5$"
s6 := "fox" // ERROR "moved to heap: s6$"
ps2 := &s2 // ERROR "&s2 escapes to heap$"
ps4 := &s4 // ERROR "&s4 escapes to heap$" "moved to heap: ps4$"
ps6 := &s6 // ERROR "&s6 escapes to heap$" "moved to heap: ps6$"
u1 := U{&s1, &ps2} // ERROR "tUPiSPa &ps2 does not escape$" "tUPiSPa &s1 does not escape$"
u2 := &U{&s3, &ps4} // ERROR "&ps4 escapes to heap$" "&s3 escapes to heap$" "tUPiSPa &U literal does not escape$"
u3 := &U{&s5, &ps6} // ERROR "&U literal escapes to heap$" "&ps6 escapes to heap$" "&s5 escapes to heap$"
v := &V{u1, u2, &u3} // ERROR "tUPiSPa &V literal does not escape$" "tUPiSPa &u3 does not escape$"
ps2 := &s2
ps4 := &s4 // ERROR "moved to heap: ps4$"
ps6 := &s6 // ERROR "moved to heap: ps6$"
u1 := U{&s1, &ps2}
u2 := &U{&s3, &ps4} // ERROR "tUPiSPa &U literal does not escape$"
u3 := &U{&s5, &ps6} // ERROR "&U literal escapes to heap$"
v := &V{u1, u2, &u3} // ERROR "tUPiSPa &V literal does not escape$"
Ssink = v.UPiSPa() // Ssink = &s3 (only &s3 really escapes)
}
@ -137,13 +137,13 @@ func tUPiSPb() {
s4 := "dog" // ERROR "moved to heap: s4$"
s5 := "emu" // ERROR "moved to heap: s5$"
s6 := "fox" // ERROR "moved to heap: s6$"
ps2 := &s2 // ERROR "&s2 escapes to heap$"
ps4 := &s4 // ERROR "&s4 escapes to heap$" "moved to heap: ps4$"
ps6 := &s6 // ERROR "&s6 escapes to heap$" "moved to heap: ps6$"
u1 := U{&s1, &ps2} // ERROR "tUPiSPb &ps2 does not escape$" "tUPiSPb &s1 does not escape$"
u2 := &U{&s3, &ps4} // ERROR "&ps4 escapes to heap$" "&s3 escapes to heap$" "tUPiSPb &U literal does not escape$"
u3 := &U{&s5, &ps6} // ERROR "&U literal escapes to heap$" "&ps6 escapes to heap$" "&s5 escapes to heap$"
v := &V{u1, u2, &u3} // ERROR "tUPiSPb &V literal does not escape$" "tUPiSPb &u3 does not escape$"
ps2 := &s2
ps4 := &s4 // ERROR "moved to heap: ps4$"
ps6 := &s6 // ERROR "moved to heap: ps6$"
u1 := U{&s1, &ps2}
u2 := &U{&s3, &ps4} // ERROR "tUPiSPb &U literal does not escape$"
u3 := &U{&s5, &ps6} // ERROR "&U literal escapes to heap$"
v := &V{u1, u2, &u3} // ERROR "tUPiSPb &V literal does not escape$"
Ssink = v.UPiSPb() // Ssink = &s3 (only &s3 really escapes)
}
@ -155,13 +155,13 @@ func tUPiSPc() {
s4 := "dog" // ERROR "moved to heap: s4$"
s5 := "emu" // ERROR "moved to heap: s5$"
s6 := "fox" // ERROR "moved to heap: s6$"
ps2 := &s2 // ERROR "&s2 escapes to heap$"
ps4 := &s4 // ERROR "&s4 escapes to heap$" "moved to heap: ps4$"
ps6 := &s6 // ERROR "&s6 escapes to heap$" "moved to heap: ps6$"
u1 := U{&s1, &ps2} // ERROR "tUPiSPc &ps2 does not escape$" "tUPiSPc &s1 does not escape$"
u2 := &U{&s3, &ps4} // ERROR "&ps4 escapes to heap$" "&s3 escapes to heap$" "tUPiSPc &U literal does not escape$"
u3 := &U{&s5, &ps6} // ERROR "&U literal escapes to heap$" "&ps6 escapes to heap$" "&s5 escapes to heap$"
v := &V{u1, u2, &u3} // ERROR "tUPiSPc &V literal does not escape$" "tUPiSPc &u3 does not escape$"
ps2 := &s2
ps4 := &s4 // ERROR "moved to heap: ps4$"
ps6 := &s6 // ERROR "moved to heap: ps6$"
u1 := U{&s1, &ps2}
u2 := &U{&s3, &ps4} // ERROR "tUPiSPc &U literal does not escape$"
u3 := &U{&s5, &ps6} // ERROR "&U literal escapes to heap$"
v := &V{u1, u2, &u3} // ERROR "tUPiSPc &V literal does not escape$"
Ssink = v.UPiSPc() // Ssink = &s3 (only &s3 really escapes)
}
@ -173,13 +173,13 @@ func tUPiSPd() {
s4 := "dog" // ERROR "moved to heap: s4$"
s5 := "emu" // ERROR "moved to heap: s5$"
s6 := "fox" // ERROR "moved to heap: s6$"
ps2 := &s2 // ERROR "&s2 escapes to heap$"
ps4 := &s4 // ERROR "&s4 escapes to heap$" "moved to heap: ps4$"
ps6 := &s6 // ERROR "&s6 escapes to heap$" "moved to heap: ps6$"
u1 := U{&s1, &ps2} // ERROR "tUPiSPd &ps2 does not escape$" "tUPiSPd &s1 does not escape$"
u2 := &U{&s3, &ps4} // ERROR "&ps4 escapes to heap$" "&s3 escapes to heap$" "tUPiSPd &U literal does not escape$"
u3 := &U{&s5, &ps6} // ERROR "&U literal escapes to heap$" "&ps6 escapes to heap$" "&s5 escapes to heap$"
v := &V{u1, u2, &u3} // ERROR "tUPiSPd &V literal does not escape$" "tUPiSPd &u3 does not escape$"
ps2 := &s2
ps4 := &s4 // ERROR "moved to heap: ps4$"
ps6 := &s6 // ERROR "moved to heap: ps6$"
u1 := U{&s1, &ps2}
u2 := &U{&s3, &ps4} // ERROR "tUPiSPd &U literal does not escape$"
u3 := &U{&s5, &ps6} // ERROR "&U literal escapes to heap$"
v := &V{u1, u2, &u3} // ERROR "tUPiSPd &V literal does not escape$"
Ssink = v.UPiSPd() // Ssink = &s3 (only &s3 really escapes)
}
@ -192,11 +192,11 @@ func (v V) UPiSPPib() *string { // ERROR "leaking param: v to result ~r0 level=2
}
func (v V) UPiSPPic() *string { // ERROR "leaking param: v to result ~r0 level=2$"
return *v.UP()._spp // ERROR "V.UPiSPPic v does not escape$"
return *v.UP()._spp
}
func (v V) UPiSPPid() *string { // ERROR "leaking param: v to result ~r0 level=2$"
return v.UP().SPPi() // ERROR "V.UPiSPPid v does not escape$"
return v.UP().SPPi()
}
// BAD: need fine-grained (field-sensitive) analysis to avoid spurious escape of all but &s4
@ -207,13 +207,13 @@ func tUPiSPPia() {
s4 := "dog" // ERROR "moved to heap: s4$"
s5 := "emu" // ERROR "moved to heap: s5$"
s6 := "fox" // ERROR "moved to heap: s6$"
ps2 := &s2 // ERROR "tUPiSPPia &s2 does not escape$"
ps4 := &s4 // ERROR "&s4 escapes to heap$"
ps6 := &s6 // ERROR "&s6 escapes to heap$" "moved to heap: ps6$"
u1 := U{&s1, &ps2} // ERROR "tUPiSPPia &ps2 does not escape$" "tUPiSPPia &s1 does not escape$"
u2 := &U{&s3, &ps4} // ERROR "tUPiSPPia &U literal does not escape$" "tUPiSPPia &ps4 does not escape$" "tUPiSPPia &s3 does not escape$"
u3 := &U{&s5, &ps6} // ERROR "&ps6 escapes to heap$" "&s5 escapes to heap$" "tUPiSPPia &U literal does not escape$"
v := &V{u1, u2, &u3} // ERROR "tUPiSPPia &V literal does not escape$" "tUPiSPPia &u3 does not escape$"
ps2 := &s2
ps4 := &s4
ps6 := &s6 // ERROR "moved to heap: ps6$"
u1 := U{&s1, &ps2}
u2 := &U{&s3, &ps4} // ERROR "tUPiSPPia &U literal does not escape$"
u3 := &U{&s5, &ps6} // ERROR "tUPiSPPia &U literal does not escape$"
v := &V{u1, u2, &u3} // ERROR "tUPiSPPia &V literal does not escape$"
Ssink = v.UPiSPPia() // Ssink = *&ps4 = &s4 (only &s4 really escapes)
}
@ -225,13 +225,13 @@ func tUPiSPPib() {
s4 := "dog" // ERROR "moved to heap: s4$"
s5 := "emu" // ERROR "moved to heap: s5$"
s6 := "fox" // ERROR "moved to heap: s6$"
ps2 := &s2 // ERROR "tUPiSPPib &s2 does not escape$"
ps4 := &s4 // ERROR "&s4 escapes to heap$"
ps6 := &s6 // ERROR "&s6 escapes to heap$" "moved to heap: ps6$"
u1 := U{&s1, &ps2} // ERROR "tUPiSPPib &ps2 does not escape$" "tUPiSPPib &s1 does not escape$"
u2 := &U{&s3, &ps4} // ERROR "tUPiSPPib &U literal does not escape$" "tUPiSPPib &ps4 does not escape$" "tUPiSPPib &s3 does not escape$"
u3 := &U{&s5, &ps6} // ERROR "&ps6 escapes to heap$" "&s5 escapes to heap$" "tUPiSPPib &U literal does not escape$"
v := &V{u1, u2, &u3} // ERROR "tUPiSPPib &V literal does not escape$" "tUPiSPPib &u3 does not escape$"
ps2 := &s2
ps4 := &s4
ps6 := &s6 // ERROR "moved to heap: ps6$"
u1 := U{&s1, &ps2}
u2 := &U{&s3, &ps4} // ERROR "tUPiSPPib &U literal does not escape$"
u3 := &U{&s5, &ps6} // ERROR "tUPiSPPib &U literal does not escape$"
v := &V{u1, u2, &u3} // ERROR "tUPiSPPib &V literal does not escape$"
Ssink = v.UPiSPPib() // Ssink = *&ps4 = &s4 (only &s4 really escapes)
}
@ -243,13 +243,13 @@ func tUPiSPPic() {
s4 := "dog" // ERROR "moved to heap: s4$"
s5 := "emu" // ERROR "moved to heap: s5$"
s6 := "fox" // ERROR "moved to heap: s6$"
ps2 := &s2 // ERROR "tUPiSPPic &s2 does not escape$"
ps4 := &s4 // ERROR "&s4 escapes to heap$"
ps6 := &s6 // ERROR "&s6 escapes to heap$" "moved to heap: ps6$"
u1 := U{&s1, &ps2} // ERROR "tUPiSPPic &ps2 does not escape$" "tUPiSPPic &s1 does not escape$"
u2 := &U{&s3, &ps4} // ERROR "tUPiSPPic &U literal does not escape$" "tUPiSPPic &ps4 does not escape$" "tUPiSPPic &s3 does not escape$"
u3 := &U{&s5, &ps6} // ERROR "&ps6 escapes to heap$" "&s5 escapes to heap$" "tUPiSPPic &U literal does not escape$"
v := &V{u1, u2, &u3} // ERROR "tUPiSPPic &V literal does not escape$" "tUPiSPPic &u3 does not escape$"
ps2 := &s2
ps4 := &s4
ps6 := &s6 // ERROR "moved to heap: ps6$"
u1 := U{&s1, &ps2}
u2 := &U{&s3, &ps4} // ERROR "tUPiSPPic &U literal does not escape$"
u3 := &U{&s5, &ps6} // ERROR "tUPiSPPic &U literal does not escape$"
v := &V{u1, u2, &u3} // ERROR "tUPiSPPic &V literal does not escape$"
Ssink = v.UPiSPPic() // Ssink = *&ps4 = &s4 (only &s4 really escapes)
}
@ -261,13 +261,13 @@ func tUPiSPPid() {
s4 := "dog" // ERROR "moved to heap: s4$"
s5 := "emu" // ERROR "moved to heap: s5$"
s6 := "fox" // ERROR "moved to heap: s6$"
ps2 := &s2 // ERROR "tUPiSPPid &s2 does not escape$"
ps4 := &s4 // ERROR "&s4 escapes to heap$"
ps6 := &s6 // ERROR "&s6 escapes to heap$" "moved to heap: ps6$"
u1 := U{&s1, &ps2} // ERROR "tUPiSPPid &ps2 does not escape$" "tUPiSPPid &s1 does not escape$"
u2 := &U{&s3, &ps4} // ERROR "tUPiSPPid &U literal does not escape$" "tUPiSPPid &ps4 does not escape$" "tUPiSPPid &s3 does not escape$"
u3 := &U{&s5, &ps6} // ERROR "&ps6 escapes to heap$" "&s5 escapes to heap$" "tUPiSPPid &U literal does not escape$"
v := &V{u1, u2, &u3} // ERROR "tUPiSPPid &V literal does not escape$" "tUPiSPPid &u3 does not escape$"
ps2 := &s2
ps4 := &s4
ps6 := &s6 // ERROR "moved to heap: ps6$"
u1 := U{&s1, &ps2}
u2 := &U{&s3, &ps4} // ERROR "tUPiSPPid &U literal does not escape$"
u3 := &U{&s5, &ps6} // ERROR "tUPiSPPid &U literal does not escape$"
v := &V{u1, u2, &u3} // ERROR "tUPiSPPid &V literal does not escape$"
Ssink = v.UPiSPPid() // Ssink = *&ps4 = &s4 (only &s4 really escapes)
}
@ -287,12 +287,12 @@ func tUPPiSPPia() {
s4 := "dog"
s5 := "emu"
s6 := "fox" // ERROR "moved to heap: s6$"
ps2 := &s2 // ERROR "tUPPiSPPia &s2 does not escape$"
ps4 := &s4 // ERROR "tUPPiSPPia &s4 does not escape$"
ps6 := &s6 // ERROR "&s6 escapes to heap$"
u1 := U{&s1, &ps2} // ERROR "tUPPiSPPia &ps2 does not escape$" "tUPPiSPPia &s1 does not escape$"
u2 := &U{&s3, &ps4} // ERROR "tUPPiSPPia &U literal does not escape$" "tUPPiSPPia &ps4 does not escape$" "tUPPiSPPia &s3 does not escape$"
u3 := &U{&s5, &ps6} // ERROR "tUPPiSPPia &U literal does not escape$" "tUPPiSPPia &ps6 does not escape$" "tUPPiSPPia &s5 does not escape$"
v := &V{u1, u2, &u3} // ERROR "tUPPiSPPia &V literal does not escape$" "tUPPiSPPia &u3 does not escape$"
ps2 := &s2
ps4 := &s4
ps6 := &s6
u1 := U{&s1, &ps2}
u2 := &U{&s3, &ps4} // ERROR "tUPPiSPPia &U literal does not escape$"
u3 := &U{&s5, &ps6} // ERROR "tUPPiSPPia &U literal does not escape$"
v := &V{u1, u2, &u3} // ERROR "tUPPiSPPia &V literal does not escape$"
Ssink = v.UPPiSPPia() // Ssink = *&ps6 = &s6 (only &s6 really escapes)
}

138
test/escape_struct_param2.go
View File

@ -36,16 +36,16 @@ func (u U) SPPi() *string { // ERROR "leaking param: u to result ~r0 level=1$"
func tSPPi() {
s := "cat" // ERROR "moved to heap: s$"
ps := &s // ERROR "&s escapes to heap$"
pps := &ps // ERROR "tSPPi &ps does not escape$"
ps := &s
pps := &ps
pu := &U{ps, pps} // ERROR "tSPPi &U literal does not escape$"
Ssink = pu.SPPi()
}
func tiSPP() {
s := "cat" // ERROR "moved to heap: s$"
ps := &s // ERROR "&s escapes to heap$"
pps := &ps // ERROR "tiSPP &ps does not escape$"
ps := &s
pps := &ps
pu := &U{ps, pps} // ERROR "tiSPP &U literal does not escape$"
Ssink = *pu.SPP()
}
@ -53,8 +53,8 @@ func tiSPP() {
// BAD: need fine-grained analysis to avoid spurious escape of ps
func tSP() {
s := "cat" // ERROR "moved to heap: s$"
ps := &s // ERROR "&s escapes to heap$" "moved to heap: ps$"
pps := &ps // ERROR "&ps escapes to heap$"
ps := &s // ERROR "moved to heap: ps$"
pps := &ps
pu := &U{ps, pps} // ERROR "tSP &U literal does not escape$"
Ssink = pu.SP()
}
@ -119,13 +119,13 @@ func tUPiSPa() {
s4 := "dog" // ERROR "moved to heap: s4$"
s5 := "emu" // ERROR "moved to heap: s5$"
s6 := "fox" // ERROR "moved to heap: s6$"
ps2 := &s2 // ERROR "&s2 escapes to heap$"
ps4 := &s4 // ERROR "&s4 escapes to heap$" "moved to heap: ps4$"
ps6 := &s6 // ERROR "&s6 escapes to heap$" "moved to heap: ps6$"
u1 := U{&s1, &ps2} // ERROR "tUPiSPa &ps2 does not escape$" "tUPiSPa &s1 does not escape$"
u2 := &U{&s3, &ps4} // ERROR "&ps4 escapes to heap$" "&s3 escapes to heap$" "tUPiSPa &U literal does not escape$"
u3 := &U{&s5, &ps6} // ERROR "&U literal escapes to heap$" "&ps6 escapes to heap$" "&s5 escapes to heap$"
v := &V{u1, u2, &u3} // ERROR "tUPiSPa &V literal does not escape$" "tUPiSPa &u3 does not escape$"
ps2 := &s2
ps4 := &s4 // ERROR "moved to heap: ps4$"
ps6 := &s6 // ERROR "moved to heap: ps6$"
u1 := U{&s1, &ps2}
u2 := &U{&s3, &ps4} // ERROR "tUPiSPa &U literal does not escape$"
u3 := &U{&s5, &ps6} // ERROR "&U literal escapes to heap$"
v := &V{u1, u2, &u3} // ERROR "tUPiSPa &V literal does not escape$"
Ssink = v.UPiSPa() // Ssink = &s3 (only &s3 really escapes)
}
@ -137,13 +137,13 @@ func tUPiSPb() {
s4 := "dog" // ERROR "moved to heap: s4$"
s5 := "emu" // ERROR "moved to heap: s5$"
s6 := "fox" // ERROR "moved to heap: s6$"
ps2 := &s2 // ERROR "&s2 escapes to heap$"
ps4 := &s4 // ERROR "&s4 escapes to heap$" "moved to heap: ps4$"
ps6 := &s6 // ERROR "&s6 escapes to heap$" "moved to heap: ps6$"
u1 := U{&s1, &ps2} // ERROR "tUPiSPb &ps2 does not escape$" "tUPiSPb &s1 does not escape$"
u2 := &U{&s3, &ps4} // ERROR "&ps4 escapes to heap$" "&s3 escapes to heap$" "tUPiSPb &U literal does not escape$"
u3 := &U{&s5, &ps6} // ERROR "&U literal escapes to heap$" "&ps6 escapes to heap$" "&s5 escapes to heap$"
v := &V{u1, u2, &u3} // ERROR "tUPiSPb &V literal does not escape$" "tUPiSPb &u3 does not escape$"
ps2 := &s2
ps4 := &s4 // ERROR "moved to heap: ps4$"
ps6 := &s6 // ERROR "moved to heap: ps6$"
u1 := U{&s1, &ps2}
u2 := &U{&s3, &ps4} // ERROR "tUPiSPb &U literal does not escape$"
u3 := &U{&s5, &ps6} // ERROR "&U literal escapes to heap$"
v := &V{u1, u2, &u3} // ERROR "tUPiSPb &V literal does not escape$"
Ssink = v.UPiSPb() // Ssink = &s3 (only &s3 really escapes)
}
@ -155,13 +155,13 @@ func tUPiSPc() {
s4 := "dog" // ERROR "moved to heap: s4$"
s5 := "emu" // ERROR "moved to heap: s5$"
s6 := "fox" // ERROR "moved to heap: s6$"
ps2 := &s2 // ERROR "&s2 escapes to heap$"
ps4 := &s4 // ERROR "&s4 escapes to heap$" "moved to heap: ps4$"
ps6 := &s6 // ERROR "&s6 escapes to heap$" "moved to heap: ps6$"
u1 := U{&s1, &ps2} // ERROR "tUPiSPc &ps2 does not escape$" "tUPiSPc &s1 does not escape$"
u2 := &U{&s3, &ps4} // ERROR "&ps4 escapes to heap$" "&s3 escapes to heap$" "tUPiSPc &U literal does not escape$"
u3 := &U{&s5, &ps6} // ERROR "&U literal escapes to heap$" "&ps6 escapes to heap$" "&s5 escapes to heap$"
v := &V{u1, u2, &u3} // ERROR "tUPiSPc &V literal does not escape$" "tUPiSPc &u3 does not escape$"
ps2 := &s2
ps4 := &s4 // ERROR "moved to heap: ps4$"
ps6 := &s6 // ERROR "moved to heap: ps6$"
u1 := U{&s1, &ps2}
u2 := &U{&s3, &ps4} // ERROR "tUPiSPc &U literal does not escape$"
u3 := &U{&s5, &ps6} // ERROR "&U literal escapes to heap$"
v := &V{u1, u2, &u3} // ERROR "tUPiSPc &V literal does not escape$"
Ssink = v.UPiSPc() // Ssink = &s3 (only &s3 really escapes)
}
@ -173,13 +173,13 @@ func tUPiSPd() {
s4 := "dog" // ERROR "moved to heap: s4$"
s5 := "emu" // ERROR "moved to heap: s5$"
s6 := "fox" // ERROR "moved to heap: s6$"
ps2 := &s2 // ERROR "&s2 escapes to heap$"
ps4 := &s4 // ERROR "&s4 escapes to heap$" "moved to heap: ps4$"
ps6 := &s6 // ERROR "&s6 escapes to heap$" "moved to heap: ps6$"
u1 := U{&s1, &ps2} // ERROR "tUPiSPd &ps2 does not escape$" "tUPiSPd &s1 does not escape$"
u2 := &U{&s3, &ps4} // ERROR "&ps4 escapes to heap$" "&s3 escapes to heap$" "tUPiSPd &U literal does not escape$"
u3 := &U{&s5, &ps6} // ERROR "&U literal escapes to heap$" "&ps6 escapes to heap$" "&s5 escapes to heap$"
v := &V{u1, u2, &u3} // ERROR "tUPiSPd &V literal does not escape$" "tUPiSPd &u3 does not escape$"
ps2 := &s2
ps4 := &s4 // ERROR "moved to heap: ps4$"
ps6 := &s6 // ERROR "moved to heap: ps6$"
u1 := U{&s1, &ps2}
u2 := &U{&s3, &ps4} // ERROR "tUPiSPd &U literal does not escape$"
u3 := &U{&s5, &ps6} // ERROR "&U literal escapes to heap$"
v := &V{u1, u2, &u3} // ERROR "tUPiSPd &V literal does not escape$"
Ssink = v.UPiSPd() // Ssink = &s3 (only &s3 really escapes)
}
@ -207,13 +207,13 @@ func tUPiSPPia() {
s4 := "dog" // ERROR "moved to heap: s4$"
s5 := "emu" // ERROR "moved to heap: s5$"
s6 := "fox" // ERROR "moved to heap: s6$"
ps2 := &s2 // ERROR "tUPiSPPia &s2 does not escape$"
ps4 := &s4 // ERROR "&s4 escapes to heap$"
ps6 := &s6 // ERROR "&s6 escapes to heap$" "moved to heap: ps6$"
u1 := U{&s1, &ps2} // ERROR "tUPiSPPia &ps2 does not escape$" "tUPiSPPia &s1 does not escape$"
u2 := &U{&s3, &ps4} // ERROR "tUPiSPPia &U literal does not escape$" "tUPiSPPia &ps4 does not escape$" "tUPiSPPia &s3 does not escape$"
u3 := &U{&s5, &ps6} // ERROR "&ps6 escapes to heap$" "&s5 escapes to heap$" "tUPiSPPia &U literal does not escape$"
v := &V{u1, u2, &u3} // ERROR "tUPiSPPia &V literal does not escape$" "tUPiSPPia &u3 does not escape$"
ps2 := &s2
ps4 := &s4
ps6 := &s6 // ERROR "moved to heap: ps6$"
u1 := U{&s1, &ps2}
u2 := &U{&s3, &ps4} // ERROR "tUPiSPPia &U literal does not escape$"
u3 := &U{&s5, &ps6} // ERROR "tUPiSPPia &U literal does not escape$"
v := &V{u1, u2, &u3} // ERROR "tUPiSPPia &V literal does not escape$"
Ssink = v.UPiSPPia() // Ssink = *&ps4 = &s4 (only &s4 really escapes)
}
@ -225,13 +225,13 @@ func tUPiSPPib() {
s4 := "dog" // ERROR "moved to heap: s4$"
s5 := "emu" // ERROR "moved to heap: s5$"
s6 := "fox" // ERROR "moved to heap: s6$"
ps2 := &s2 // ERROR "tUPiSPPib &s2 does not escape$"
ps4 := &s4 // ERROR "&s4 escapes to heap$"
ps6 := &s6 // ERROR "&s6 escapes to heap$" "moved to heap: ps6$"
u1 := U{&s1, &ps2} // ERROR "tUPiSPPib &ps2 does not escape$" "tUPiSPPib &s1 does not escape$"
u2 := &U{&s3, &ps4} // ERROR "tUPiSPPib &U literal does not escape$" "tUPiSPPib &ps4 does not escape$" "tUPiSPPib &s3 does not escape$"
u3 := &U{&s5, &ps6} // ERROR "&ps6 escapes to heap$" "&s5 escapes to heap$" "tUPiSPPib &U literal does not escape$"
v := &V{u1, u2, &u3} // ERROR "tUPiSPPib &V literal does not escape$" "tUPiSPPib &u3 does not escape$"
ps2 := &s2
ps4 := &s4
ps6 := &s6 // ERROR "moved to heap: ps6$"
u1 := U{&s1, &ps2}
u2 := &U{&s3, &ps4} // ERROR "tUPiSPPib &U literal does not escape$"
u3 := &U{&s5, &ps6} // ERROR "tUPiSPPib &U literal does not escape$"
v := &V{u1, u2, &u3} // ERROR "tUPiSPPib &V literal does not escape$"
Ssink = v.UPiSPPib() // Ssink = *&ps4 = &s4 (only &s4 really escapes)
}
@ -243,13 +243,13 @@ func tUPiSPPic() {
s4 := "dog" // ERROR "moved to heap: s4$"
s5 := "emu" // ERROR "moved to heap: s5$"
s6 := "fox" // ERROR "moved to heap: s6$"
ps2 := &s2 // ERROR "tUPiSPPic &s2 does not escape$"
ps4 := &s4 // ERROR "&s4 escapes to heap$"
ps6 := &s6 // ERROR "&s6 escapes to heap$" "moved to heap: ps6$"
u1 := U{&s1, &ps2} // ERROR "tUPiSPPic &ps2 does not escape$" "tUPiSPPic &s1 does not escape$"
u2 := &U{&s3, &ps4} // ERROR "tUPiSPPic &U literal does not escape$" "tUPiSPPic &ps4 does not escape$" "tUPiSPPic &s3 does not escape$"
u3 := &U{&s5, &ps6} // ERROR "&ps6 escapes to heap$" "&s5 escapes to heap$" "tUPiSPPic &U literal does not escape$"
v := &V{u1, u2, &u3} // ERROR "tUPiSPPic &V literal does not escape$" "tUPiSPPic &u3 does not escape$"
ps2 := &s2
ps4 := &s4
ps6 := &s6 // ERROR "moved to heap: ps6$"
u1 := U{&s1, &ps2}
u2 := &U{&s3, &ps4} // ERROR "tUPiSPPic &U literal does not escape$"
u3 := &U{&s5, &ps6} // ERROR "tUPiSPPic &U literal does not escape$"
v := &V{u1, u2, &u3} // ERROR "tUPiSPPic &V literal does not escape$"
Ssink = v.UPiSPPic() // Ssink = *&ps4 = &s4 (only &s4 really escapes)
}
@ -261,13 +261,13 @@ func tUPiSPPid() {
s4 := "dog" // ERROR "moved to heap: s4$"
s5 := "emu" // ERROR "moved to heap: s5$"
s6 := "fox" // ERROR "moved to heap: s6$"
ps2 := &s2 // ERROR "tUPiSPPid &s2 does not escape$"
ps4 := &s4 // ERROR "&s4 escapes to heap$"
ps6 := &s6 // ERROR "&s6 escapes to heap$" "moved to heap: ps6$"
u1 := U{&s1, &ps2} // ERROR "tUPiSPPid &ps2 does not escape$" "tUPiSPPid &s1 does not escape$"
u2 := &U{&s3, &ps4} // ERROR "tUPiSPPid &U literal does not escape$" "tUPiSPPid &ps4 does not escape$" "tUPiSPPid &s3 does not escape$"
u3 := &U{&s5, &ps6} // ERROR "&ps6 escapes to heap$" "&s5 escapes to heap$" "tUPiSPPid &U literal does not escape$"
v := &V{u1, u2, &u3} // ERROR "tUPiSPPid &V literal does not escape$" "tUPiSPPid &u3 does not escape$"
ps2 := &s2
ps4 := &s4
ps6 := &s6 // ERROR "moved to heap: ps6$"
u1 := U{&s1, &ps2}
u2 := &U{&s3, &ps4} // ERROR "tUPiSPPid &U literal does not escape$"
u3 := &U{&s5, &ps6} // ERROR "tUPiSPPid &U literal does not escape$"
v := &V{u1, u2, &u3} // ERROR "tUPiSPPid &V literal does not escape$"
Ssink = v.UPiSPPid() // Ssink = *&ps4 = &s4 (only &s4 really escapes)
}
@ -287,12 +287,12 @@ func tUPPiSPPia() { // This test is sensitive to the level cap in function summa
s4 := "dog"
s5 := "emu"
s6 := "fox" // ERROR "moved to heap: s6$"
ps2 := &s2 // ERROR "tUPPiSPPia &s2 does not escape$"
ps4 := &s4 // ERROR "tUPPiSPPia &s4 does not escape$"
ps6 := &s6 // ERROR "&s6 escapes to heap$"
u1 := U{&s1, &ps2} // ERROR "tUPPiSPPia &ps2 does not escape$" "tUPPiSPPia &s1 does not escape$"
u2 := &U{&s3, &ps4} // ERROR "tUPPiSPPia &U literal does not escape$" "tUPPiSPPia &ps4 does not escape$" "tUPPiSPPia &s3 does not escape$"
u3 := &U{&s5, &ps6} // ERROR "tUPPiSPPia &U literal does not escape$" "tUPPiSPPia &ps6 does not escape$" "tUPPiSPPia &s5 does not escape$"
v := &V{u1, u2, &u3} // ERROR "tUPPiSPPia &V literal does not escape$" "tUPPiSPPia &u3 does not escape$"
ps2 := &s2
ps4 := &s4
ps6 := &s6
u1 := U{&s1, &ps2}
u2 := &U{&s3, &ps4} // ERROR "tUPPiSPPia &U literal does not escape$"
u3 := &U{&s5, &ps6} // ERROR "tUPPiSPPia &U literal does not escape$"
v := &V{u1, u2, &u3} // ERROR "tUPPiSPPia &V literal does not escape$"
Ssink = v.UPPiSPPia() // Ssink = *&ps6 = &s6 (only &s6 really escapes)
}

24
test/escape_struct_return.go
View File

@ -25,8 +25,8 @@ func B(spp **string) U { // ERROR "leaking param: spp to result ~r1 level=0$" "l
func tA1() {
s := "cat"
sp := &s // ERROR "tA1 &s does not escape$"
spp := &sp // ERROR "tA1 &sp does not escape$"
sp := &s
spp := &sp
u := A(sp, spp)
_ = u
println(s)
@ -34,24 +34,24 @@ func tA1() {
func tA2() {
s := "cat"
sp := &s // ERROR "tA2 &s does not escape$"
spp := &sp // ERROR "tA2 &sp does not escape$"
sp := &s
spp := &sp
u := A(sp, spp)
println(*u._sp)
}
func tA3() {
s := "cat"
sp := &s // ERROR "tA3 &s does not escape$"
spp := &sp // ERROR "tA3 &sp does not escape$"
sp := &s
spp := &sp
u := A(sp, spp)
println(**u._spp)
}
func tB1() {
s := "cat"
sp := &s // ERROR "tB1 &s does not escape$"
spp := &sp // ERROR "tB1 &sp does not escape$"
sp := &s
spp := &sp
u := B(spp)
_ = u
println(s)
@ -59,16 +59,16 @@ func tB1() {
func tB2() {
s := "cat"
sp := &s // ERROR "tB2 &s does not escape$"
spp := &sp // ERROR "tB2 &sp does not escape$"
sp := &s
spp := &sp
u := B(spp)
println(*u._sp)
}
func tB3() {
s := "cat"
sp := &s // ERROR "tB3 &s does not escape$"
spp := &sp // ERROR "tB3 &sp does not escape$"
sp := &s
spp := &sp
u := B(spp)
println(**u._spp)
}

18
test/fixedbugs/issue12006.go
View File

@ -37,28 +37,28 @@ func FooNz(vals ...*int) (s int) { // ERROR "leaking param: vals"
func TFooN() {
for i := 0; i < 1000; i++ {
var i, j int
FooN(&i, &j) // ERROR "TFooN &i does not escape" "TFooN &j does not escape" "TFooN ... argument does not escape"
FooN(&i, &j) // ERROR "TFooN ... argument does not escape"
}
}
func TFooNx() {
for i := 0; i < 1000; i++ {
var i, j, k int // ERROR "moved to heap: i" "moved to heap: j" "moved to heap: k"
FooNx(&k, &i, &j) // ERROR "&k escapes to heap" "&i escapes to heap" "&j escapes to heap" "TFooNx ... argument does not escape"
FooNx(&k, &i, &j) // ERROR "TFooNx ... argument does not escape"
}
}
func TFooNy() {
for i := 0; i < 1000; i++ {
var i, j, k int // ERROR "moved to heap: i" "moved to heap: j" "moved to heap: k"
FooNy(&k, &i, &j) // ERROR "&i escapes to heap" "&j escapes to heap" "&k escapes to heap" "... argument escapes to heap"
FooNy(&k, &i, &j) // ERROR "... argument escapes to heap"
}
}
func TFooNz() {
for i := 0; i < 1000; i++ {
var i, j int // ERROR "moved to heap: i" "moved to heap: j"
FooNz(&i, &j) // ERROR "&i escapes to heap" "&j escapes to heap" "... argument escapes to heap"
FooNz(&i, &j) // ERROR "... argument escapes to heap"
}
}
@ -83,7 +83,7 @@ func FooI(args ...interface{}) { // ERROR "leaking param content: args"
func TFooI() {
a := int32(1) // ERROR "moved to heap: a"
b := "cat"
c := &a // ERROR "&a escapes to heap"
c := &a
FooI(a, b, c) // ERROR "a escapes to heap" "b escapes to heap" "c escapes to heap" "TFooI ... argument does not escape"
}
@ -107,14 +107,14 @@ func FooJ(args ...interface{}) *int32 { // ERROR "leaking param: args to result
func TFooJ1() {
a := int32(1)
b := "cat"
c := &a // ERROR "TFooJ1 &a does not escape"
c := &a
FooJ(a, b, c) // ERROR "TFooJ1 a does not escape" "TFooJ1 b does not escape" "TFooJ1 c does not escape" "TFooJ1 ... argument does not escape"
}
func TFooJ2() {
a := int32(1) // ERROR "moved to heap: a"
b := "cat"
c := &a // ERROR "&a escapes to heap"
c := &a
isink = FooJ(a, b, c) // ERROR "a escapes to heap" "b escapes to heap" "c escapes to heap" "TFooJ2 ... argument does not escape"
}
@ -143,7 +143,7 @@ func FooK(args fakeSlice) *int32 { // ERROR "leaking param: args to result ~r1 l
func TFooK2() {
a := int32(1) // ERROR "moved to heap: a"
b := "cat"
c := &a // ERROR "&a escapes to heap"
c := &a
fs := fakeSlice{3, &[4]interface{}{a, b, c, nil}} // ERROR "a escapes to heap" "b escapes to heap" "c escapes to heap" "TFooK2 &\[4\]interface {} literal does not escape"
isink = FooK(fs)
}
@ -168,7 +168,7 @@ func FooL(args []interface{}) *int32 { // ERROR "leaking param: args to result ~
func TFooL2() {
a := int32(1) // ERROR "moved to heap: a"
b := "cat"
c := &a // ERROR "&a escapes to heap"
c := &a
s := []interface{}{a, b, c} // ERROR "a escapes to heap" "b escapes to heap" "c escapes to heap" "TFooL2 \[\]interface {} literal does not escape"
isink = FooL(s)
}

28
test/fixedbugs/issue12588.go
View File

@ -18,7 +18,7 @@ type B struct {
}
func f(a A) int {
for i, x := range &a.b { // ERROR "f &a.b does not escape"
for i, x := range &a.b {
if x != 0 {
return 64*i + int(x)
}
@ -27,7 +27,7 @@ func f(a A) int {
}
func g(a *A) int { // ERROR "g a does not escape"
for i, x := range &a.b { // ERROR "g &a.b does not escape"
for i, x := range &a.b {
if x != 0 {
return 64*i + int(x)
}
@ -36,7 +36,7 @@ func g(a *A) int { // ERROR "g a does not escape"
}
func h(a *B) *uint64 { // ERROR "leaking param: a to result ~r1 level=1"
for i, x := range &a.b { // ERROR "h &a.b does not escape"
for i, x := range &a.b {
if i == 0 {
return x
}
@ -45,7 +45,7 @@ func h(a *B) *uint64 { // ERROR "leaking param: a to result ~r1 level=1"
}
func h2(a *B) *uint64 { // ERROR "leaking param: a to result ~r1 level=1"
p := &a.b // ERROR "h2 &a.b does not escape"
p := &a.b
for i, x := range p {
if i == 0 {
return x
@ -56,7 +56,7 @@ func h2(a *B) *uint64 { // ERROR "leaking param: a to result ~r1 level=1"
// Seems like below should be level=1, not 0.
func k(a B) *uint64 { // ERROR "leaking param: a to result ~r1 level=0"
for i, x := range &a.b { // ERROR "k &a.b does not escape"
for i, x := range &a.b {
if i == 0 {
return x
}
@ -70,16 +70,16 @@ func main() {
var a1, a2 A
var b1, b2, b3, b4 B
var x1, x2, x3, x4 uint64 // ERROR "moved to heap: x1" "moved to heap: x3"
b1.b[0] = &x1 // ERROR "&x1 escapes to heap"
b2.b[0] = &x2 // ERROR "main &x2 does not escape"
b3.b[0] = &x3 // ERROR "&x3 escapes to heap"
b4.b[0] = &x4 // ERROR "main &x4 does not escape"
b1.b[0] = &x1
b2.b[0] = &x2
b3.b[0] = &x3
b4.b[0] = &x4
f(a1)
g(&a2) // ERROR "main &a2 does not escape"
sink = h(&b1) // ERROR "main &b1 does not escape"
h(&b2) // ERROR "main &b2 does not escape"
sink = h2(&b1) // ERROR "main &b1 does not escape"
h2(&b4) // ERROR "main &b4 does not escape"
g(&a2)
sink = h(&b1)
h(&b2)
sink = h2(&b1)
h2(&b4)
x1 = 17
println("*sink=", *sink) // Verify that sink addresses x1
x3 = 42

18
test/fixedbugs/issue13799.go
View File

@ -50,10 +50,10 @@ func test1(iter int) {
// var fn func() // this makes it work, because fn stays off heap
j := 0 // ERROR "moved to heap: j$"
fn = func() { // ERROR "func literal escapes to heap$"
m[i] = append(m[i], 0) // ERROR "&i escapes to heap$"
if j < 25 { // ERROR "&j escapes to heap$"
m[i] = append(m[i], 0)
if j < 25 {
j++
fn() // ERROR "&fn escapes to heap$"
fn()
}
}
fn()
@ -92,16 +92,16 @@ func test3(iter int) {
const maxI = 500
var x int // ERROR "moved to heap: x$"
m := &x // ERROR "&x escapes to heap$"
m := &x
var fn func() // ERROR "moved to heap: fn$"
for i := 0; i < maxI; i++ {
// var fn func() // this makes it work, because fn stays off heap
j := 0 // ERROR "moved to heap: j$"
fn = func() { // ERROR "func literal escapes to heap$"
if j < 100 { // ERROR "&j escapes to heap$"
if j < 100 {
j++
fn() // ERROR "&fn escapes to heap$"
fn()
} else {
*m = *m + 1
}
@ -118,7 +118,7 @@ func test4(iter int) {
const maxI = 500
var x int
m := &x // ERROR "test4 &x does not escape$"
m := &x
// var fn func()
for i := 0; i < maxI; i++ {
@ -157,7 +157,7 @@ func test5(iter int) {
const maxI = 500
var x int // ERROR "moved to heap: x$"
m := &x // ERROR "&x escapes to heap$"
m := &x
var fn *str
for i := 0; i < maxI; i++ {
@ -175,7 +175,7 @@ func test6(iter int) {
const maxI = 500
var x int
m := &x // ERROR "&x does not escape$"
m := &x
// var fn *str
for i := 0; i < maxI; i++ {

4
test/fixedbugs/issue19743.go
View File

@ -22,8 +22,8 @@ func toString(b immutableBytes) string { // ERROR "leaking param: b$"
return s
}
strHeader := (*reflect.StringHeader)(unsafe.Pointer(&s)) // ERROR "toString &s does not escape$"
strHeader.Data = (*reflect.SliceHeader)(unsafe.Pointer(&b)).Data // ERROR "toString &b does not escape$"
strHeader := (*reflect.StringHeader)(unsafe.Pointer(&s))
strHeader.Data = (*reflect.SliceHeader)(unsafe.Pointer(&b)).Data
l := len(b)
strHeader.Len = l

4
test/fixedbugs/issue21709.go
View File

@ -17,7 +17,7 @@ func F1() {
var s S // ERROR "moved to heap: s"
for i := 0; i < N; i++ {
fs := []func(){ // ERROR "F1 \[\]func\(\) literal does not escape"
s.Inc, // ERROR "F1 s.Inc does not escape" "s escapes to heap"
s.Inc, // ERROR "F1 s.Inc does not escape"
}
for _, f := range fs {
f()
@ -29,7 +29,7 @@ func F2() {
var s S // ERROR "moved to heap: s"
for i := 0; i < N; i++ {
for _, f := range []func(){ // ERROR "F2 \[\]func\(\) literal does not escape"
s.Inc, // ERROR "F2 s.Inc does not escape" "s escapes to heap"
s.Inc, // ERROR "F2 s.Inc does not escape"
} {
f()
}

4
test/fixedbugs/issue4099.go
View File

@ -19,8 +19,8 @@ func F2([]byte)
func G() {
var buf1 [10]byte
F1(buf1[:]) // ERROR "buf1 does not escape"
F1(buf1[:])
var buf2 [10]byte // ERROR "moved to heap: buf2"
F2(buf2[:]) // ERROR "buf2 escapes to heap"
F2(buf2[:])
}

12
test/fixedbugs/issue7921.go
View File

@ -17,9 +17,9 @@ func bufferNotEscape() string {
// copied during String() call, but object "handle" itself
// can be stack-allocated.
var b bytes.Buffer
b.WriteString("123") // ERROR "bufferNotEscape b does not escape$"
b.Write([]byte{'4'}) // ERROR "bufferNotEscape \[\]byte literal does not escape$" "bufferNotEscape b does not escape$"
return b.String() // ERROR "bufferNotEscape b does not escape$" "inlining call to bytes.\(\*Buffer\).String$" "string\(bytes.b.buf\[bytes.b.off:\]\) escapes to heap$"
b.WriteString("123")
b.Write([]byte{'4'}) // ERROR "bufferNotEscape \[\]byte literal does not escape$"
return b.String() // ERROR "inlining call to bytes.\(\*Buffer\).String$" "string\(bytes.b.buf\[bytes.b.off:\]\) escapes to heap$"
}
func bufferNoEscape2(xs []string) int { // ERROR "bufferNoEscape2 xs does not escape$"
@ -41,9 +41,9 @@ func bufferNoEscape3(xs []string) string { // ERROR "bufferNoEscape3 xs does not
func bufferNoEscape4() []byte {
var b bytes.Buffer
b.Grow(64) // ERROR "bufferNoEscape4 b does not escape$" "bufferNoEscape4 ignoring self-assignment in bytes.b.buf = bytes.b.buf\[:bytes.m·3\]$" "inlining call to bytes.\(\*Buffer\).Grow$"
useBuffer(&b) // ERROR "bufferNoEscape4 &b does not escape$"
return b.Bytes() // ERROR "bufferNoEscape4 b does not escape$" "inlining call to bytes.\(\*Buffer\).Bytes$"
b.Grow(64) // ERROR "bufferNoEscape4 ignoring self-assignment in bytes.b.buf = bytes.b.buf\[:bytes.m·3\]$" "inlining call to bytes.\(\*Buffer\).Grow$"
useBuffer(&b)
return b.Bytes() // ERROR "inlining call to bytes.\(\*Buffer\).Bytes$"
}
func bufferNoEscape5() { // ERROR "can inline bufferNoEscape5$"

6
test/inline.go
View File

@ -74,7 +74,7 @@ func m() int {
// address taking prevents closure inlining
func n() int {
foo := func() int { return 1 } // ERROR "can inline n.func1" "func literal does not escape"
bar := &foo // ERROR "&foo does not escape"
bar := &foo
x := (*bar)() + foo()
return x
}
@ -115,7 +115,7 @@ func s0(x int) int {
foo := func() { // ERROR "can inline s0.func1" "s0 func literal does not escape"
x = x + 1
}
foo() // ERROR "inlining call to s0.func1" "&x does not escape"
foo() // ERROR "inlining call to s0.func1"
return x
}
@ -124,7 +124,7 @@ func s1(x int) int {
return x
}
x = x + 1
return foo() // ERROR "inlining call to s1.func1" "&x does not escape"
return foo() // ERROR "inlining call to s1.func1"
}
// can't currently inline functions with a break statement

10
test/inline_sync.go
View File

@ -24,30 +24,30 @@ var mutex *sync.Mutex
func small5() { // ERROR "can inline small5"
// the Unlock fast path should be inlined
mutex.Unlock() // ERROR "inlining call to sync\.\(\*Mutex\)\.Unlock" "&sync\.m\.state escapes to heap"
mutex.Unlock() // ERROR "inlining call to sync\.\(\*Mutex\)\.Unlock"
}
func small6() { // ERROR "can inline small6"
// the Lock fast path should be inlined
mutex.Lock() // ERROR "inlining call to sync\.\(\*Mutex\)\.Lock" "&sync\.m\.state escapes to heap"
mutex.Lock() // ERROR "inlining call to sync\.\(\*Mutex\)\.Lock"
}
var once *sync.Once
func small7() { // ERROR "can inline small7"
// the Do fast path should be inlined
once.Do(small5) // ERROR "inlining call to sync\.\(\*Once\)\.Do" "&sync\.o\.done escapes to heap"
once.Do(small5) // ERROR "inlining call to sync\.\(\*Once\)\.Do"
}
var rwmutex *sync.RWMutex
func small8() { // ERROR "can inline small8"
// the RUnlock fast path should be inlined
rwmutex.RUnlock() // ERROR "inlining call to sync\.\(\*RWMutex\)\.RUnlock" "&sync\.rw\.readerCount escapes to heap"
rwmutex.RUnlock() // ERROR "inlining call to sync\.\(\*RWMutex\)\.RUnlock"
}
func small9() { // ERROR "can inline small9"
// the RLock fast path should be inlined
rwmutex.RLock() // ERROR "inlining call to sync\.\(\*RWMutex\)\.RLock" "&sync\.rw\.readerCount escapes to heap" "&sync\.rw\.readerSem escapes to heap"
rwmutex.RLock() // ERROR "inlining call to sync\.\(\*RWMutex\)\.RLock"
}

8
test/live_syscall.go
View File

@ -19,22 +19,22 @@ func f(uintptr) // ERROR "f assuming arg#1 is unsafe uintptr"
func g() { // ERROR "can inline g"
var t int
f(uintptr(unsafe.Pointer(&t))) // ERROR "live at call to f: .?autotmp" "g &t does not escape" "stack object .autotmp_[0-9]+ unsafe.Pointer$"
f(uintptr(unsafe.Pointer(&t))) // ERROR "live at call to f: .?autotmp" "stack object .autotmp_[0-9]+ unsafe.Pointer$"
}
func h() { // ERROR "can inline h"
var v int
syscall.Syscall(0, 1, uintptr(unsafe.Pointer(&v)), 2) // ERROR "live at call to Syscall: .?autotmp" "h &v does not escape" "stack object .autotmp_[0-9]+ unsafe.Pointer$"
syscall.Syscall(0, 1, uintptr(unsafe.Pointer(&v)), 2) // ERROR "live at call to Syscall: .?autotmp" "stack object .autotmp_[0-9]+ unsafe.Pointer$"
}
func i() { // ERROR "can inline i"
var t int
p := unsafe.Pointer(&t) // ERROR "i &t does not escape"
p := unsafe.Pointer(&t)
f(uintptr(p)) // ERROR "live at call to f: .?autotmp" "stack object .autotmp_[0-9]+ unsafe.Pointer$"
}
func j() { // ERROR "can inline j"
var v int
p := unsafe.Pointer(&v) // ERROR "j &v does not escape"
p := unsafe.Pointer(&v)
syscall.Syscall(0, 1, uintptr(p), 2) // ERROR "live at call to Syscall: .?autotmp" "stack object .autotmp_[0-9]+ unsafe.Pointer$"
}

4
test/uintptrescapes2.go
View File

@ -30,9 +30,9 @@ func F4(...uintptr) {} // ERROR "escaping ...uintptr"
func G() {
var t int // ERROR "moved to heap"
F1(uintptr(unsafe.Pointer(&t))) // ERROR "live at call to F1: .?autotmp" "&t escapes to heap" "stack object .autotmp_[0-9]+ unsafe.Pointer$"
F1(uintptr(unsafe.Pointer(&t))) // ERROR "live at call to F1: .?autotmp" "stack object .autotmp_[0-9]+ unsafe.Pointer$"
var t2 int // ERROR "moved to heap"
F3(uintptr(unsafe.Pointer(&t2))) // ERROR "live at call to F3: .?autotmp" "&t2 escapes to heap"
F3(uintptr(unsafe.Pointer(&t2))) // ERROR "live at call to F3: .?autotmp"
}
func H() {