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chromium
GitHub Repository: chromium/chromium
 Path: blob/main/base/allocator/partition_allocator/src/partition_alloc/arm_bti_test_functions.h
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// Copyright 2021 The Chromium Authors

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// Use of this source code is governed by a BSD-style license that can be

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// found in the LICENSE file.

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#ifdef UNSAFE_BUFFERS_BUILD

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// TODO(crbug.com/40284755): Remove this and spanify to fix the errors.

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#pragma allow_unsafe_buffers

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#endif

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#ifndef PARTITION_ALLOC_ARM_BTI_TEST_FUNCTIONS_H_

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#define PARTITION_ALLOC_ARM_BTI_TEST_FUNCTIONS_H_

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#include "partition_alloc/build_config.h"

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#if PA_BUILDFLAG(PA_ARCH_CPU_ARM64)

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extern "C" {

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/**

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 * A valid BTI function. Jumping to this funtion should not cause any problem in

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 * a BTI enabled environment.

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 **/

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int64_t arm_bti_test_function(int64_t);

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/**

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 * A function without proper BTI landing pad. Jumping here should crash the

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 * program on systems which support BTI.

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 **/

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int64_t arm_bti_test_function_invalid_offset(int64_t);

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/**

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 * A simple function which immediately returns to sender.

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 **/

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void arm_bti_test_function_end(void);

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}

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#endif  // PA_BUILDFLAG(PA_ARCH_CPU_ARM64)

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#endif  // PARTITION_ALLOC_ARM_BTI_TEST_FUNCTIONS_H_

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