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| 1 // Copyright 2015 The Crashpad Authors. All rights reserved. | 1 // Copyright 2015 The Crashpad Authors. All rights reserved. |
| 2 // | 2 // |
| 3 // Licensed under the Apache License, Version 2.0 (the "License"); | 3 // Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 // you may not use this file except in compliance with the License. | 4 // you may not use this file except in compliance with the License. |
| 5 // You may obtain a copy of the License at | 5 // You may obtain a copy of the License at |
| 6 // | 6 // |
| 7 // http://www.apache.org/licenses/LICENSE-2.0 | 7 // http://www.apache.org/licenses/LICENSE-2.0 |
| 8 // | 8 // |
| 9 // Unless required by applicable law or agreed to in writing, software | 9 // Unless required by applicable law or agreed to in writing, software |
| 10 // distributed under the License is distributed on an "AS IS" BASIS, | 10 // distributed under the License is distributed on an "AS IS" BASIS, |
| 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 // See the License for the specific language governing permissions and | 12 // See the License for the specific language governing permissions and |
| 13 // limitations under the License. | 13 // limitations under the License. |
| 14 | 14 |
| 15 #ifndef CRASHPAD_UTIL_NUMERIC_CHECKED_ADDRESS_RANGE_H_ | 15 #ifndef CRASHPAD_UTIL_NUMERIC_CHECKED_ADDRESS_RANGE_H_ |
| 16 #define CRASHPAD_UTIL_NUMERIC_CHECKED_ADDRESS_RANGE_H_ | 16 #define CRASHPAD_UTIL_NUMERIC_CHECKED_ADDRESS_RANGE_H_ |
| 17 | 17 |
| 18 #include <stdint.h> | 18 #include <stdint.h> |
| 19 | 19 |
| 20 #include <string> |
| 21 |
| 20 #include "build/build_config.h" | 22 #include "build/build_config.h" |
| 21 #include "util/numeric/checked_range.h" | 23 #include "util/numeric/checked_range.h" |
| 22 | 24 |
| 23 namespace crashpad { | 25 namespace crashpad { |
| 24 namespace internal { | 26 namespace internal { |
| 25 | 27 |
| 26 //! \brief Ensures that a range, composed of a base and a size, does not | 28 //! \brief Ensures that a range, composed of a base and a size, does not |
| 27 //! overflow the pointer type of the process it describes a range in. | 29 //! overflow the pointer type of the process it describes a range in. |
| 28 //! | 30 //! |
| 29 //! This class checks bases of type `ValueType` and sizes of type `SizeType` | 31 //! This class checks bases of type `ValueType` and sizes of type `SizeType` |
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| 101 //! base, and the contained address range’s end is less than or equal to the | 103 //! base, and the contained address range’s end is less than or equal to the |
| 102 //! containing address range’s end. | 104 //! containing address range’s end. |
| 103 //! | 105 //! |
| 104 //! This method should only be called on two CheckedAddressRangeGeneric | 106 //! This method should only be called on two CheckedAddressRangeGeneric |
| 105 //! objects representing address ranges in the same process. | 107 //! objects representing address ranges in the same process. |
| 106 //! | 108 //! |
| 107 //! This method must only be called if IsValid() would return `true` for both | 109 //! This method must only be called if IsValid() would return `true` for both |
| 108 //! CheckedAddressRangeGeneric objects involved. | 110 //! CheckedAddressRangeGeneric objects involved. |
| 109 bool ContainsRange(const CheckedAddressRangeGeneric& that) const; | 111 bool ContainsRange(const CheckedAddressRangeGeneric& that) const; |
| 110 | 112 |
| 113 //! \brief Returns a string describing the address range. |
| 114 //! |
| 115 //! The string will be formatted as `"0x123 + 0x45 (64)"`, where the |
| 116 //! individual components are the address, size, and bitness. |
| 117 std::string AsString() const; |
| 118 |
| 111 private: | 119 private: |
| 112 #if defined(COMPILER_MSVC) | 120 #if defined(COMPILER_MSVC) |
| 113 // MSVC cannot handle a union containing CheckedRange (with constructor, etc.) | 121 // MSVC cannot handle a union containing CheckedRange (with constructor, etc.) |
| 114 // currently. | 122 // currently. |
| 115 CheckedRange<uint32_t> range_32_; | 123 CheckedRange<uint32_t> range_32_; |
| 116 CheckedRange<uint64_t> range_64_; | 124 CheckedRange<uint64_t> range_64_; |
| 117 #else | 125 #else |
| 118 // The field of the union that is expressed is determined by is_64_bit_. | 126 // The field of the union that is expressed is determined by is_64_bit_. |
| 119 union { | 127 union { |
| 120 CheckedRange<uint32_t> range_32_; | 128 CheckedRange<uint32_t> range_32_; |
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| 135 // types in 32-bit processes. | 143 // types in 32-bit processes. |
| 136 bool range_ok_; | 144 bool range_ok_; |
| 137 | 145 |
| 138 DISALLOW_COPY_AND_ASSIGN(CheckedAddressRangeGeneric); | 146 DISALLOW_COPY_AND_ASSIGN(CheckedAddressRangeGeneric); |
| 139 }; | 147 }; |
| 140 | 148 |
| 141 } // namespace internal | 149 } // namespace internal |
| 142 } // namespace crashpad | 150 } // namespace crashpad |
| 143 | 151 |
| 144 #endif // CRASHPAD_UTIL_NUMERIC_CHECKED_ADDRESS_RANGE_H_ | 152 #endif // CRASHPAD_UTIL_NUMERIC_CHECKED_ADDRESS_RANGE_H_ |
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