// Copyright 2024 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 asan

import (
	"unsafe"
)

const Enabled = true

//go:linkname Read runtime.asanread
func Read(addr unsafe.Pointer, len uintptr)

//go:linkname Write runtime.asanwrite

// https://github.com/llvm/llvm-project/blob/main/compiler-rt/lib/asan/asan_init_version.h
// This structure describes an instrumented global variable.
//
// TODO: If a later version of the ASan library changes __asan_global or __asan_global_source_location
// structure, we need to make the same changes.
struct _asan_global {
	uintptr_t beg;
	uintptr_t size;

// 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) {

// license that can be found in the LICENSE file.

//go:build !asan

// Dummy ASan support API, used when not built with -asan.

package runtime

import (
	"unsafe"
)

const asanenabled = false

// Because asanenabled is false, none of these functions should be called.

func asanread(addr unsafe.Pointer, sz uintptr)            { throw("asan") }
func asanwrite(addr unsafe.Pointer, sz uintptr)           { throw("asan") }

[!GOOS:darwin] [race] ! stderr '-msan'

[msan] ! go install -msan triv.go
[msan] stderr '-msan requires cgo'
[msan] ! stderr '-race'

[asan] ! go install -asan triv.go
[asan] stderr '(-asan: the version of $(go env CC) could not be parsed)|(-asan: C compiler is not gcc or clang)|(-asan is not supported with [A-Za-z]+ compiler (\d+)\.(\d+))|(-asan requires cgo)'
[asan] ! stderr '-msan'

-- triv.go --
package main

	if err != nil {
		t.Fatal(err)
	}
	// The asan tests require support for the -asan option.
	if !platform.ASanSupported(goos, goarch) {
		t.Skipf("skipping on %s/%s; -asan option is not supported.", goos, goarch)
	}
	// The current implementation is only compatible with the ASan library from version
	// v7 to v9 (See the description in src/runtime/asan/asan.go). Therefore, using the

// license that can be found in the LICENSE file.

// Package asan contains helper functions for manually instrumenting
// code for the address sanitizer.
// The runtime package intentionally exports these functions only in the
// asan build; this package exports them unconditionally but without the
// "asan" build tag they are no-ops.

		fmt.Fprintf(os.Stderr, "-asan is not supported on %s/%s\n", cfg.Goos, cfg.Goarch)
		base.SetExitStatus(2)
		base.Exit()
	}
	// The current implementation is only compatible with the ASan library from version
	// v7 to v9 (See the description in src/runtime/asan/asan.go). Therefore, using the
	// -asan option must use a compatible version of ASan library, which requires that

// Copyright 2024 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 asan

import (
	"unsafe"
)

const Enabled = false

func Read(addr unsafe.Pointer, len uintptr) {}

		if n > 0 {
			race.WriteRange(unsafe.Pointer(&p[0]), n)
		}
		if err == nil {
			race.Acquire(unsafe.Pointer(&ioSync))
		}
	}
	if msan.Enabled && n > 0 {
		msan.Write(unsafe.Pointer(&p[0]), uintptr(n))
	}
	if asan.Enabled && n > 0 {
		asan.Write(unsafe.Pointer(&p[0]), uintptr(n))
	}
	return
}

func Write(fd int, p []byte) (n int, err error) {
	if race.Enabled {