diff options
| -rw-r--r-- | src/cmd/compile/internal/base/flag.go | 10 | ||||
| -rw-r--r-- | test/fixedbugs/bug513.go | 20 |
2 files changed, 29 insertions, 1 deletions
diff --git a/src/cmd/compile/internal/base/flag.go b/src/cmd/compile/internal/base/flag.go index eb46ed99af..33c2c862b0 100644 --- a/src/cmd/compile/internal/base/flag.go +++ b/src/cmd/compile/internal/base/flag.go @@ -161,6 +161,8 @@ func ParseFlags() { Flag.WB = true Debug.InlFuncsWithClosures = 1 + Debug.Checkptr = -1 // so we can tell whether it is set explicitly + Flag.Cfg.ImportMap = make(map[string]string) objabi.AddVersionFlag() // -V @@ -216,7 +218,9 @@ func ParseFlags() { } if Flag.Race || Flag.MSan { // -race and -msan imply -d=checkptr for now. - Debug.Checkptr = 1 + if Debug.Checkptr == -1 { // if not set explicitly + Debug.Checkptr = 1 + } } if Flag.CompilingRuntime && Flag.N != 0 { @@ -237,6 +241,10 @@ func ParseFlags() { Debug.Libfuzzer = 0 } + if Debug.Checkptr == -1 { // if not set explicitly + Debug.Checkptr = 0 + } + // set via a -d flag Ctxt.Debugpcln = Debug.PCTab } diff --git a/test/fixedbugs/bug513.go b/test/fixedbugs/bug513.go new file mode 100644 index 0000000000..f7604f681c --- /dev/null +++ b/test/fixedbugs/bug513.go @@ -0,0 +1,20 @@ +// run -race -gcflags=all=-d=checkptr=0 +// +build linux,amd64 linux,ppc64le darwin,amd64 freebsd,amd64 netbsd,amd64 windows,amd64 + +// Copyright 2021 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Although -race turns on -d=checkptr, the explicit -d=checkptr=0 +// should override it. + +package main + +import "unsafe" + +var v1 = new([2]int16) +var v2 *[3]int64 + +func main() { + v2 = (*[3]int64)(unsafe.Pointer(uintptr(unsafe.Pointer(&(*v1)[0])))) +} |