// 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") }

// 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.

// 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) {}

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build asan

#include "go_asm.h"
#include "go_tls.h"
#include "funcdata.h"
#include "textflag.h"

// This is like race_amd64.s, but for the asan calls.
// See race_amd64.s for detailed comments.

#ifdef GOOS_windows
#define RARG0 CX
#define RARG1 DX
#define RARG2 R8
#define RARG3 R9

		c = tconv(c, types.NewPtr(defStringstruct))
		c = ir.NewSelectorExpr(base.Pos, ir.ODOT, c, lname("data"))
		setField("moduleName", c, i)
		// Assign asanL[i].filename, asanL[i].line, asanL[i].column
		// and assign globals[i].location = uintptr(unsafe.Pointer(&asanL[i]))
		asanLi := ir.NewIndexExpr(base.Pos, asanlocation, ir.NewInt(base.Pos, int64(i)))
		filename := ir.NewString(base.Pos, base.Ctxt.PosTable.Pos(n.Pos()).Filename()+"\000")

// 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

#include "go_asm.h"
#include "textflag.h"

#define RARG0 R0
#define RARG1 R1
#define RARG2 R2
#define RARG3 R3
#define FARG R4

// Called from instrumented code.
// func runtime·doasanread(addr unsafe.Pointer, sz, sp, pc uintptr)

		return script.OnceCondition(summary, func() (bool, error) { return f(), nil })
	}

	add("abscc", script.Condition("default $CC path is absolute and exists", defaultCCIsAbsolute))
	add("asan", sysCondition("-asan", platform.ASanSupported, true))
	add("buildmode", script.PrefixCondition("go supports -buildmode=<suffix>", hasBuildmode))
	add("case-sensitive", script.OnceCondition("$WORK filesystem is case-sensitive", isCaseSensitive))