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53fd522c0d
Follows suit with https://go-review.googlesource.com/#/c/20111. Generated by running $ grep -R 'Go Authors. All' * | cut -d":" -f1 | while read F;do perl -pi -e 's/Go Authors. All/Go Authors. All/g' $F;done The code in cmd/internal/unvendor wasn't changed. Fixes #15213 Change-Id: I4f235cee0a62ec435f9e8540a1ec08ae03b1a75f Reviewed-on: https://go-review.googlesource.com/21819 Reviewed-by: Ian Lance Taylor <iant@golang.org> Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
299 lines
13 KiB
Go
299 lines
13 KiB
Go
// errorcheck -0 -m -l
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// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Test escape analysis for *struct function parameters.
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// Note companion strict_param2 checks struct function parameters with similar tests.
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package notmain
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var Ssink *string
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type U struct {
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_sp *string
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_spp **string
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}
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type V struct {
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_u U
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_up *U
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_upp **U
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}
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func (u *U) SP() *string { // ERROR "leaking param: u to result ~r0 level=1$"
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return u._sp
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}
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func (u *U) SPP() **string { // ERROR "leaking param: u to result ~r0 level=1$"
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return u._spp
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}
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func (u *U) SPPi() *string { // ERROR "leaking param: u to result ~r0 level=2$"
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return *u._spp
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}
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func tSPPi() {
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s := "cat" // ERROR "moved to heap: s$"
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ps := &s // ERROR "&s escapes to heap$"
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pps := &ps // ERROR "tSPPi &ps does not escape$"
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pu := &U{ps, pps} // ERROR "tSPPi &U literal does not escape$"
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Ssink = pu.SPPi()
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}
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func tiSPP() {
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s := "cat" // ERROR "moved to heap: s$"
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ps := &s // ERROR "&s escapes to heap$"
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pps := &ps // ERROR "tiSPP &ps does not escape$"
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pu := &U{ps, pps} // ERROR "tiSPP &U literal does not escape$"
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Ssink = *pu.SPP()
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}
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// BAD: need fine-grained (field-sensitive) analysis to avoid spurious escape of ps
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func tSP() {
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s := "cat" // ERROR "moved to heap: s$"
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ps := &s // ERROR "&s escapes to heap$" "moved to heap: ps$"
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pps := &ps // ERROR "&ps escapes to heap$"
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pu := &U{ps, pps} // ERROR "tSP &U literal does not escape$"
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Ssink = pu.SP()
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}
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func (v *V) u() U { // ERROR "leaking param: v to result ~r0 level=1$"
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return v._u
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}
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func (v *V) UP() *U { // ERROR "leaking param: v to result ~r0 level=1$"
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return v._up
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}
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func (v *V) UPP() **U { // ERROR "leaking param: v to result ~r0 level=1$"
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return v._upp
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}
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func (v *V) UPPia() *U { // ERROR "leaking param: v to result ~r0 level=2$"
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return *v._upp
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}
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func (v *V) UPPib() *U { // ERROR "leaking param: v to result ~r0 level=2$"
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return *v.UPP()
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}
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func (v *V) USPa() *string { // ERROR "leaking param: v to result ~r0 level=1$"
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return v._u._sp
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}
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func (v *V) USPb() *string { // ERROR "leaking param: v to result ~r0 level=1$"
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return v.u()._sp
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}
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func (v *V) USPPia() *string { // ERROR "leaking param: v to result ~r0 level=2$"
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return *v._u._spp
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}
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func (v *V) USPPib() *string { // ERROR "leaking param: v to result ~r0 level=2$"
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return v._u.SPPi() // ERROR "\(\*V\).USPPib v._u does not escape$"
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}
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func (v *V) UPiSPa() *string { // ERROR "leaking param: v to result ~r0 level=2$"
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return v._up._sp
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}
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func (v *V) UPiSPb() *string { // ERROR "leaking param: v to result ~r0 level=2$"
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return v._up.SP()
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}
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func (v *V) UPiSPc() *string { // ERROR "leaking param: v to result ~r0 level=2$"
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return v.UP()._sp
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}
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func (v *V) UPiSPd() *string { // ERROR "leaking param: v to result ~r0 level=2$"
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return v.UP().SP()
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}
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// BAD: need fine-grained (field-sensitive) analysis to avoid spurious escape of all but &s3
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func tUPiSPa() {
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s1 := "ant"
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s2 := "bat" // ERROR "moved to heap: s2$"
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s3 := "cat" // ERROR "moved to heap: s3$"
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s4 := "dog" // ERROR "moved to heap: s4$"
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s5 := "emu" // ERROR "moved to heap: s5$"
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s6 := "fox" // ERROR "moved to heap: s6$"
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ps2 := &s2 // ERROR "&s2 escapes to heap$"
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ps4 := &s4 // ERROR "&s4 escapes to heap$" "moved to heap: ps4$"
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ps6 := &s6 // ERROR "&s6 escapes to heap$" "moved to heap: ps6$"
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u1 := U{&s1, &ps2} // ERROR "tUPiSPa &ps2 does not escape$" "tUPiSPa &s1 does not escape$"
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u2 := &U{&s3, &ps4} // ERROR "&ps4 escapes to heap$" "&s3 escapes to heap$" "tUPiSPa &U literal does not escape$"
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u3 := &U{&s5, &ps6} // ERROR "&U literal escapes to heap$" "&ps6 escapes to heap$" "&s5 escapes to heap$"
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v := &V{u1, u2, &u3} // ERROR "tUPiSPa &V literal does not escape$" "tUPiSPa &u3 does not escape$"
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Ssink = v.UPiSPa() // Ssink = &s3 (only &s3 really escapes)
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}
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// BAD: need fine-grained (field-sensitive) analysis to avoid spurious escape of all but &s3
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func tUPiSPb() {
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s1 := "ant"
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s2 := "bat" // ERROR "moved to heap: s2$"
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s3 := "cat" // ERROR "moved to heap: s3$"
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s4 := "dog" // ERROR "moved to heap: s4$"
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s5 := "emu" // ERROR "moved to heap: s5$"
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s6 := "fox" // ERROR "moved to heap: s6$"
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ps2 := &s2 // ERROR "&s2 escapes to heap$"
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ps4 := &s4 // ERROR "&s4 escapes to heap$" "moved to heap: ps4$"
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ps6 := &s6 // ERROR "&s6 escapes to heap$" "moved to heap: ps6$"
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u1 := U{&s1, &ps2} // ERROR "tUPiSPb &ps2 does not escape$" "tUPiSPb &s1 does not escape$"
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u2 := &U{&s3, &ps4} // ERROR "&ps4 escapes to heap$" "&s3 escapes to heap$" "tUPiSPb &U literal does not escape$"
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u3 := &U{&s5, &ps6} // ERROR "&U literal escapes to heap$" "&ps6 escapes to heap$" "&s5 escapes to heap$"
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v := &V{u1, u2, &u3} // ERROR "tUPiSPb &V literal does not escape$" "tUPiSPb &u3 does not escape$"
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Ssink = v.UPiSPb() // Ssink = &s3 (only &s3 really escapes)
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}
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// BAD: need fine-grained (field-sensitive) analysis to avoid spurious escape of all but &s3
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func tUPiSPc() {
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s1 := "ant"
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s2 := "bat" // ERROR "moved to heap: s2$"
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s3 := "cat" // ERROR "moved to heap: s3$"
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s4 := "dog" // ERROR "moved to heap: s4$"
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s5 := "emu" // ERROR "moved to heap: s5$"
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s6 := "fox" // ERROR "moved to heap: s6$"
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ps2 := &s2 // ERROR "&s2 escapes to heap$"
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ps4 := &s4 // ERROR "&s4 escapes to heap$" "moved to heap: ps4$"
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ps6 := &s6 // ERROR "&s6 escapes to heap$" "moved to heap: ps6$"
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u1 := U{&s1, &ps2} // ERROR "tUPiSPc &ps2 does not escape$" "tUPiSPc &s1 does not escape$"
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u2 := &U{&s3, &ps4} // ERROR "&ps4 escapes to heap$" "&s3 escapes to heap$" "tUPiSPc &U literal does not escape$"
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u3 := &U{&s5, &ps6} // ERROR "&U literal escapes to heap$" "&ps6 escapes to heap$" "&s5 escapes to heap$"
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v := &V{u1, u2, &u3} // ERROR "tUPiSPc &V literal does not escape$" "tUPiSPc &u3 does not escape$"
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Ssink = v.UPiSPc() // Ssink = &s3 (only &s3 really escapes)
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}
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// BAD: need fine-grained (field-sensitive) analysis to avoid spurious escape of all but &s3
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func tUPiSPd() {
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s1 := "ant"
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s2 := "bat" // ERROR "moved to heap: s2$"
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s3 := "cat" // ERROR "moved to heap: s3$"
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s4 := "dog" // ERROR "moved to heap: s4$"
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s5 := "emu" // ERROR "moved to heap: s5$"
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s6 := "fox" // ERROR "moved to heap: s6$"
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ps2 := &s2 // ERROR "&s2 escapes to heap$"
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ps4 := &s4 // ERROR "&s4 escapes to heap$" "moved to heap: ps4$"
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ps6 := &s6 // ERROR "&s6 escapes to heap$" "moved to heap: ps6$"
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u1 := U{&s1, &ps2} // ERROR "tUPiSPd &ps2 does not escape$" "tUPiSPd &s1 does not escape$"
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u2 := &U{&s3, &ps4} // ERROR "&ps4 escapes to heap$" "&s3 escapes to heap$" "tUPiSPd &U literal does not escape$"
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u3 := &U{&s5, &ps6} // ERROR "&U literal escapes to heap$" "&ps6 escapes to heap$" "&s5 escapes to heap$"
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v := &V{u1, u2, &u3} // ERROR "tUPiSPd &V literal does not escape$" "tUPiSPd &u3 does not escape$"
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Ssink = v.UPiSPd() // Ssink = &s3 (only &s3 really escapes)
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}
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func (v V) UPiSPPia() *string { // ERROR "leaking param: v to result ~r0 level=2$"
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return *v._up._spp
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}
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func (v V) UPiSPPib() *string { // ERROR "leaking param: v to result ~r0 level=2$"
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return v._up.SPPi()
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}
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func (v V) UPiSPPic() *string { // ERROR "leaking param: v to result ~r0 level=2$"
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return *v.UP()._spp // ERROR "V.UPiSPPic v does not escape$"
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}
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func (v V) UPiSPPid() *string { // ERROR "leaking param: v to result ~r0 level=2$"
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return v.UP().SPPi() // ERROR "V.UPiSPPid v does not escape$"
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}
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// BAD: need fine-grained (field-sensitive) analysis to avoid spurious escape of all but &s4
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func tUPiSPPia() {
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s1 := "ant"
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s2 := "bat"
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s3 := "cat"
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s4 := "dog" // ERROR "moved to heap: s4$"
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s5 := "emu" // ERROR "moved to heap: s5$"
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s6 := "fox" // ERROR "moved to heap: s6$"
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ps2 := &s2 // ERROR "tUPiSPPia &s2 does not escape$"
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ps4 := &s4 // ERROR "&s4 escapes to heap$"
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ps6 := &s6 // ERROR "&s6 escapes to heap$" "moved to heap: ps6$"
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u1 := U{&s1, &ps2} // ERROR "tUPiSPPia &ps2 does not escape$" "tUPiSPPia &s1 does not escape$"
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u2 := &U{&s3, &ps4} // ERROR "tUPiSPPia &U literal does not escape$" "tUPiSPPia &ps4 does not escape$" "tUPiSPPia &s3 does not escape$"
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u3 := &U{&s5, &ps6} // ERROR "&ps6 escapes to heap$" "&s5 escapes to heap$" "tUPiSPPia &U literal does not escape$"
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v := &V{u1, u2, &u3} // ERROR "tUPiSPPia &V literal does not escape$" "tUPiSPPia &u3 does not escape$"
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Ssink = v.UPiSPPia() // Ssink = *&ps4 = &s4 (only &s4 really escapes)
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}
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// BAD: need fine-grained (field-sensitive) analysis to avoid spurious escape of all but &s4
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func tUPiSPPib() {
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s1 := "ant"
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s2 := "bat"
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s3 := "cat"
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s4 := "dog" // ERROR "moved to heap: s4$"
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s5 := "emu" // ERROR "moved to heap: s5$"
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s6 := "fox" // ERROR "moved to heap: s6$"
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ps2 := &s2 // ERROR "tUPiSPPib &s2 does not escape$"
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ps4 := &s4 // ERROR "&s4 escapes to heap$"
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ps6 := &s6 // ERROR "&s6 escapes to heap$" "moved to heap: ps6$"
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u1 := U{&s1, &ps2} // ERROR "tUPiSPPib &ps2 does not escape$" "tUPiSPPib &s1 does not escape$"
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u2 := &U{&s3, &ps4} // ERROR "tUPiSPPib &U literal does not escape$" "tUPiSPPib &ps4 does not escape$" "tUPiSPPib &s3 does not escape$"
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u3 := &U{&s5, &ps6} // ERROR "&ps6 escapes to heap$" "&s5 escapes to heap$" "tUPiSPPib &U literal does not escape$"
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v := &V{u1, u2, &u3} // ERROR "tUPiSPPib &V literal does not escape$" "tUPiSPPib &u3 does not escape$"
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Ssink = v.UPiSPPib() // Ssink = *&ps4 = &s4 (only &s4 really escapes)
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}
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// BAD: need fine-grained (field-sensitive) analysis to avoid spurious escape of all but &s4
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func tUPiSPPic() {
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s1 := "ant"
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s2 := "bat"
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s3 := "cat"
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s4 := "dog" // ERROR "moved to heap: s4$"
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s5 := "emu" // ERROR "moved to heap: s5$"
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s6 := "fox" // ERROR "moved to heap: s6$"
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ps2 := &s2 // ERROR "tUPiSPPic &s2 does not escape$"
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ps4 := &s4 // ERROR "&s4 escapes to heap$"
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ps6 := &s6 // ERROR "&s6 escapes to heap$" "moved to heap: ps6$"
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u1 := U{&s1, &ps2} // ERROR "tUPiSPPic &ps2 does not escape$" "tUPiSPPic &s1 does not escape$"
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u2 := &U{&s3, &ps4} // ERROR "tUPiSPPic &U literal does not escape$" "tUPiSPPic &ps4 does not escape$" "tUPiSPPic &s3 does not escape$"
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u3 := &U{&s5, &ps6} // ERROR "&ps6 escapes to heap$" "&s5 escapes to heap$" "tUPiSPPic &U literal does not escape$"
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v := &V{u1, u2, &u3} // ERROR "tUPiSPPic &V literal does not escape$" "tUPiSPPic &u3 does not escape$"
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Ssink = v.UPiSPPic() // Ssink = *&ps4 = &s4 (only &s4 really escapes)
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}
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// BAD: need fine-grained (field-sensitive) analysis to avoid spurious escape of all but &s4
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func tUPiSPPid() {
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s1 := "ant"
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s2 := "bat"
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s3 := "cat"
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s4 := "dog" // ERROR "moved to heap: s4$"
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s5 := "emu" // ERROR "moved to heap: s5$"
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s6 := "fox" // ERROR "moved to heap: s6$"
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ps2 := &s2 // ERROR "tUPiSPPid &s2 does not escape$"
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ps4 := &s4 // ERROR "&s4 escapes to heap$"
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ps6 := &s6 // ERROR "&s6 escapes to heap$" "moved to heap: ps6$"
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u1 := U{&s1, &ps2} // ERROR "tUPiSPPid &ps2 does not escape$" "tUPiSPPid &s1 does not escape$"
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u2 := &U{&s3, &ps4} // ERROR "tUPiSPPid &U literal does not escape$" "tUPiSPPid &ps4 does not escape$" "tUPiSPPid &s3 does not escape$"
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u3 := &U{&s5, &ps6} // ERROR "&ps6 escapes to heap$" "&s5 escapes to heap$" "tUPiSPPid &U literal does not escape$"
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v := &V{u1, u2, &u3} // ERROR "tUPiSPPid &V literal does not escape$" "tUPiSPPid &u3 does not escape$"
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Ssink = v.UPiSPPid() // Ssink = *&ps4 = &s4 (only &s4 really escapes)
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}
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func (v *V) UPPiSPPia() *string { // ERROR "leaking param: v to result ~r0 level=4$"
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return *(*v._upp)._spp
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}
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// This test isolates the one value that needs to escape, not because
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// it distinguishes fields but because it knows that &s6 is the only
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// value reachable by two indirects from v.
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// The test depends on the level cap in the escape analysis tags
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// being able to encode that fact.
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func tUPPiSPPia() {
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s1 := "ant"
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s2 := "bat"
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s3 := "cat"
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s4 := "dog"
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s5 := "emu"
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s6 := "fox" // ERROR "moved to heap: s6$"
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ps2 := &s2 // ERROR "tUPPiSPPia &s2 does not escape$"
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ps4 := &s4 // ERROR "tUPPiSPPia &s4 does not escape$"
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ps6 := &s6 // ERROR "&s6 escapes to heap$"
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u1 := U{&s1, &ps2} // ERROR "tUPPiSPPia &ps2 does not escape$" "tUPPiSPPia &s1 does not escape$"
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u2 := &U{&s3, &ps4} // ERROR "tUPPiSPPia &U literal does not escape$" "tUPPiSPPia &ps4 does not escape$" "tUPPiSPPia &s3 does not escape$"
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u3 := &U{&s5, &ps6} // ERROR "tUPPiSPPia &U literal does not escape$" "tUPPiSPPia &ps6 does not escape$" "tUPPiSPPia &s5 does not escape$"
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v := &V{u1, u2, &u3} // ERROR "tUPPiSPPia &V literal does not escape$" "tUPPiSPPia &u3 does not escape$"
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Ssink = v.UPPiSPPia() // Ssink = *&ps6 = &s6 (only &s6 really escapes)
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}
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