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reflect, internal/reflectlite: set capacity when slicing unsafe pointers

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Follow the idiom for allowing -d=checkptr to recognize and verify
correctness.

Updates #22218.
Updates #34972.

Change-Id: Ib6001c6f0e6dc535a36bcfaa1ae48e29e0c737f8
Reviewed-on: https://go-review.googlesource.com/c/go/+/202580
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This commit is contained in:
Matthew Dempsky 2019-10-18 12:03:18 -07:00
parent 7b58581a23
commit 9989221ac1
2 changed files with 4 additions and 4 deletions
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4
src/internal/reflectlite/type.go
View File

@ -629,7 +629,7 @@ func (t *funcType) in() []*rtype {
if t.inCount == 0 {
return nil
}
return (*[1 << 20]*rtype)(add(unsafe.Pointer(t), uadd, "t.inCount > 0"))[:t.inCount]
return (*[1 << 20]*rtype)(add(unsafe.Pointer(t), uadd, "t.inCount > 0"))[:t.inCount:t.inCount]
}
func (t *funcType) out() []*rtype {
@ -641,7 +641,7 @@ func (t *funcType) out() []*rtype {
if outCount == 0 {
return nil
}
return (*[1 << 20]*rtype)(add(unsafe.Pointer(t), uadd, "outCount > 0"))[t.inCount : t.inCount+outCount]
return (*[1 << 20]*rtype)(add(unsafe.Pointer(t), uadd, "outCount > 0"))[t.inCount : t.inCount+outCount : t.inCount+outCount]
}
// add returns p+x.

4
src/reflect/type.go
View File

@ -1008,7 +1008,7 @@ func (t *funcType) in() []*rtype {
if t.inCount == 0 {
return nil
}
return (*[1 << 20]*rtype)(add(unsafe.Pointer(t), uadd, "t.inCount > 0"))[:t.inCount]
return (*[1 << 20]*rtype)(add(unsafe.Pointer(t), uadd, "t.inCount > 0"))[:t.inCount:t.inCount]
}
func (t *funcType) out() []*rtype {
@ -1020,7 +1020,7 @@ func (t *funcType) out() []*rtype {
if outCount == 0 {
return nil
}
return (*[1 << 20]*rtype)(add(unsafe.Pointer(t), uadd, "outCount > 0"))[t.inCount : t.inCount+outCount]
return (*[1 << 20]*rtype)(add(unsafe.Pointer(t), uadd, "outCount > 0"))[t.inCount : t.inCount+outCount : t.inCount+outCount]
}
// add returns p+x.