golang msan 代码
文件路径：/src/runtime/msan.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.
/go: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)
/go:noescape
func msanmove(dst, src unsafe.Pointer, sz uintptr)
/ These are called from msan_GOARCH.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
/go:cgo_import_static __msan_memmove