1 files changed, 67 insertions, 0 deletions
diff --git a/src/runtime/asan.go b/src/runtime/asan.go
new file mode 100644
index 0000000..25b8327
--- /dev/null
+++ b/src/runtime/asan.go
@@ -0,0 +1,67 @@
+// 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.
+
+//go:build asan
+
+package runtime
+
+import (
+	"unsafe"
+)
+
+// Public address sanitizer API.
+func ASanRead(addr unsafe.Pointer, len int) {
+	sp := getcallersp()
+	pc := getcallerpc()
+	doasanread(addr, uintptr(len), sp, pc)
+}
+
+func ASanWrite(addr unsafe.Pointer, len int) {
+	sp := getcallersp()
+	pc := getcallerpc()
+	doasanwrite(addr, uintptr(len), sp, pc)
+}
+
+// Private interface for the runtime.
+const asanenabled = true
+
+// asan{read,write} are nosplit because they may be called between
+// fork and exec, when the stack must not grow. See issue #50391.
+
+//go:nosplit
+func asanread(addr unsafe.Pointer, sz uintptr) {
+	sp := getcallersp()
+	pc := getcallerpc()
+	doasanread(addr, sz, sp, pc)
+}
+
+//go:nosplit
+func asanwrite(addr unsafe.Pointer, sz uintptr) {
+	sp := getcallersp()
+	pc := getcallerpc()
+	doasanwrite(addr, sz, sp, pc)
+}
+
+//go:noescape
+func doasanread(addr unsafe.Pointer, sz, sp, pc uintptr)
+
+//go:noescape
+func doasanwrite(addr unsafe.Pointer, sz, sp, pc uintptr)
+
+//go:noescape
+func asanunpoison(addr unsafe.Pointer, sz uintptr)
+
+//go:noescape
+func asanpoison(addr unsafe.Pointer, sz uintptr)
+
+//go:noescape
+func asanregisterglobals(addr unsafe.Pointer, n uintptr)
+
+// These are called from asan_GOARCH.s
+//
+//go:cgo_import_static __asan_read_go
+//go:cgo_import_static __asan_write_go
+//go:cgo_import_static __asan_unpoison_go
+//go:cgo_import_static __asan_poison_go
+//go:cgo_import_static __asan_register_globals_go