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https://github.com/golang/go
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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.
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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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// +build msan
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package runtime
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import (
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"unsafe"
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)
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// Public memory sanitizer API.
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func MSanRead(addr unsafe.Pointer, len int) {
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msanread(addr, uintptr(len))
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}
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func MSanWrite(addr unsafe.Pointer, len int) {
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msanwrite(addr, uintptr(len))
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}
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// Private interface for the runtime.
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const msanenabled = true
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// If we are running on the system stack, the C program may have
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// marked part of that stack as uninitialized. We don't instrument
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// the runtime, but operations like a slice copy can call msanread
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// anyhow for values on the stack. Just ignore msanread when running
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// on the system stack. The other msan functions are fine.
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//
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//go:nosplit
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func msanread(addr unsafe.Pointer, sz uintptr) {
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g := getg()
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if g == nil || g.m == nil || g == g.m.g0 || g == g.m.gsignal {
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return
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}
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domsanread(addr, sz)
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}
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//go:noescape
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func domsanread(addr unsafe.Pointer, sz uintptr)
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//go:noescape
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func msanwrite(addr unsafe.Pointer, sz uintptr)
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//go:noescape
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func msanmalloc(addr unsafe.Pointer, sz uintptr)
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//go:noescape
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func msanfree(addr unsafe.Pointer, sz uintptr)
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// These are called from msan_amd64.s
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//go:cgo_import_static __msan_read_go
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//go:cgo_import_static __msan_write_go
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//go:cgo_import_static __msan_malloc_go
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//go:cgo_import_static __msan_free_go
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