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| author | Ian Lance Taylor <iant@google.com> | 2016-02-03 21:58:02 +0000 |
|---|---|---|
| committer | Ian Lance Taylor <ian@gcc.gnu.org> | 2016-02-03 21:58:02 +0000 |
| commit | f98dd1a338867a408f7c72d73fbad7fe7fc93e3a (patch) | |
| tree | 2f8da9862a9c1fe0df138917f997b03439c02773 /libgo/go/runtime/msan.go | |
| parent | b081ed4efc144da0c45a6484aebfd10e0eb9fda3 (diff) | |
| download | gcc-f98dd1a338867a408f7c72d73fbad7fe7fc93e3a.zip gcc-f98dd1a338867a408f7c72d73fbad7fe7fc93e3a.tar.gz gcc-f98dd1a338867a408f7c72d73fbad7fe7fc93e3a.tar.bz2 | |
libgo: Update to go1.6rc1.
Reviewed-on: https://go-review.googlesource.com/19200
From-SVN: r233110
Diffstat (limited to 'libgo/go/runtime/msan.go')
| -rw-r--r-- | libgo/go/runtime/msan.go | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/libgo/go/runtime/msan.go b/libgo/go/runtime/msan.go new file mode 100644 index 0000000..4dbdf05 --- /dev/null +++ b/libgo/go/runtime/msan.go @@ -0,0 +1,55 @@ +// 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. +func msanread(addr unsafe.Pointer, sz uintptr) { + g := getg() + if 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 |