mirror
/
go
mirror of https://github.com/golang/go.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

make sure that len and cap are >= 0 

Change-Id: I687b2ac63a61b82561013b87f0b9d0c37c640719
This commit is contained in:
Mateusz Poliwczak 2025-02-12 20:12:37 +01:00
parent a6e512ca76
commit e42e793cd8
1 changed files with 10 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
src/cmd/compile/internal/escape/escape.go
View File

@ -128,10 +128,13 @@ func Funcs(all []*ir.Func) {
if n, ok := n.(*ir.MakeExpr); ok {
if n.Cap != nil {
if s := ir.StaticValue(n.Cap); s.Op() == ir.OLITERAL {
if v, ok := s.(*ir.BasicLit); !ok || v.Val().Kind() != constant.Int {
cap, ok := s.(*ir.BasicLit)
if !ok || cap.Val().Kind() != constant.Int {
base.Fatalf("unexpected BasicLit Kind")
}
n.Cap = s
if constant.Compare(cap.Val(), token.GEQ, constant.MakeInt64(0)) {
n.Cap = s
}
}
}
if n.Len != nil {
@ -141,9 +144,11 @@ func Funcs(all []*ir.Func) {
base.Fatalf("unexpected BasicLit Kind")
}
cap, ok := n.Cap.(*ir.BasicLit)
if n.Cap == nil || (ok && constant.Compare(cap.Val(), token.GEQ, len.Val())) {
n.Len = s
if constant.Compare(len.Val(), token.GEQ, constant.MakeInt64(0)) {
cap, ok := n.Cap.(*ir.BasicLit)
if n.Cap == nil || (ok && constant.Compare(cap.Val(), token.GEQ, len.Val())) {
n.Len = s
}
}
}
}