1 // Copyright 2017 The Crashpad Authors. All rights reserved. 2 // 3 // Licensed under the Apache License, Version 2.0 (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 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #ifndef CRASHPAD_SNAPSHOT_X86_CPUID_READER_H_ 16 #define CRASHPAD_SNAPSHOT_X86_CPUID_READER_H_ 17 18 #include <stdint.h> 19 20 #include <string> 21 22 #include "build/build_config.h" 23 24 #if defined(ARCH_CPU_X86_FAMILY) 25 26 namespace crashpad { 27 namespace internal { 28 29 //! \brief Reads x86-family CPU information by calling `cpuid`. 30 class CpuidReader { 31 public: 32 CpuidReader(); 33 ~CpuidReader(); 34 35 //! \see SystemSnapshot::CPURevision 36 uint32_t Revision() const; 37 38 //! \see SystemSnapshot::CPUVendor Vendor()39 std::string Vendor() const { return vendor_; } 40 41 //! \see SystemSnapshot::CPUX86Signature Signature()42 uint32_t Signature() const { return signature_; } 43 44 //! \see SystemSnapshot::CPUX86Features Features()45 uint64_t Features() const { return features_; } 46 47 //! \see SystemSnapshot::CPUX86ExtendedFeatures ExtendedFeatures()48 uint64_t ExtendedFeatures() const { return extended_features_; } 49 50 //! \see SystemSnapshot::CPUX86Leaf7Features 51 uint32_t Leaf7Features() const; 52 53 //! \see SystemSnapshot::NXEnabled NXEnabled()54 bool NXEnabled() const { return (ExtendedFeatures() & (1 << 20)) != 0; } 55 56 //! \see SystemSnapshot::CPUX86SupportsDAZ 57 bool SupportsDAZ() const; 58 59 private: 60 void Cpuid(uint32_t cpuinfo[4], uint32_t leaf) const; 61 62 uint64_t features_; 63 uint64_t extended_features_; 64 std::string vendor_; 65 uint32_t max_leaf_; 66 uint32_t signature_; 67 }; 68 69 } // namespace internal 70 } // namespace crashpad 71 72 #endif // ARCH_CPU_X86_FAMILY 73 74 #endif // CRASHPAD_SNAPSHOT_X86_CPUID_READER_H_ 75