mirror of
https://github.com/golang/go
synced 2024-11-19 15:05:00 -07:00
ea7d9e6a52
fixes #18707. Change-Id: Ibc4efef01197799f66d10bfead22faf8ac00473c Reviewed-on: https://go-review.googlesource.com/35452 Run-TryBot: Bryan Mills <bcmills@google.com> Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org>
58 lines
1.4 KiB
Go
58 lines
1.4 KiB
Go
// Copyright 2015 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.
|
|
|
|
// +build msan
|
|
|
|
package runtime
|
|
|
|
import (
|
|
"unsafe"
|
|
)
|
|
|
|
// Public memory sanitizer API.
|
|
|
|
func MSanRead(addr unsafe.Pointer, len int) {
|
|
msanread(addr, uintptr(len))
|
|
}
|
|
|
|
func MSanWrite(addr unsafe.Pointer, len int) {
|
|
msanwrite(addr, uintptr(len))
|
|
}
|
|
|
|
// Private interface for the runtime.
|
|
const msanenabled = true
|
|
|
|
// If we are running on the system stack, the C program may have
|
|
// marked part of that stack as uninitialized. We don't instrument
|
|
// the runtime, but operations like a slice copy can call msanread
|
|
// anyhow for values on the stack. Just ignore msanread when running
|
|
// on the system stack. The other msan functions are fine.
|
|
//
|
|
//go:nosplit
|
|
func msanread(addr unsafe.Pointer, sz uintptr) {
|
|
g := getg()
|
|
if g == nil || g.m == nil || g == g.m.g0 || g == g.m.gsignal {
|
|
return
|
|
}
|
|
domsanread(addr, sz)
|
|
}
|
|
|
|
//go:noescape
|
|
func domsanread(addr unsafe.Pointer, sz uintptr)
|
|
|
|
//go:noescape
|
|
func msanwrite(addr unsafe.Pointer, sz uintptr)
|
|
|
|
//go:noescape
|
|
func msanmalloc(addr unsafe.Pointer, sz uintptr)
|
|
|
|
//go:noescape
|
|
func msanfree(addr unsafe.Pointer, sz uintptr)
|
|
|
|
// These are called from msan_amd64.s
|
|
//go:cgo_import_static __msan_read_go
|
|
//go:cgo_import_static __msan_write_go
|
|
//go:cgo_import_static __msan_malloc_go
|
|
//go:cgo_import_static __msan_free_go
|