1 // Copyright 2011 Google LLC 2 // 3 // Redistribution and use in source and binary forms, with or without 4 // modification, are permitted provided that the following conditions are 5 // met: 6 // 7 // * Redistributions of source code must retain the above copyright 8 // notice, this list of conditions and the following disclaimer. 9 // * Redistributions in binary form must reproduce the above 10 // copyright notice, this list of conditions and the following disclaimer 11 // in the documentation and/or other materials provided with the 12 // distribution. 13 // * Neither the name of Google LLC nor the names of its 14 // contributors may be used to endorse or promote products derived from 15 // this software without specific prior written permission. 16 // 17 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 20 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 21 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 22 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 23 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 27 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 29 // minidump_memory_range.h: Define the google_breakpad::MinidumpMemoryRange 30 // class, which adds methods for handling minidump specific data structures 31 // on top of google_breakpad::MemoryRange. See common/memory_range.h for 32 // more details on MemoryRange. 33 34 #ifndef TOOLS_LINUX_MD2CORE_MINIDUMP_MEMORY_RANGE_H_ 35 #define TOOLS_LINUX_MD2CORE_MINIDUMP_MEMORY_RANGE_H_ 36 37 #include <string> 38 39 #include "common/memory_range.h" 40 #include "google_breakpad/common/minidump_format.h" 41 42 namespace google_breakpad { 43 44 // A derived class of MemoryRange with added methods for handling minidump 45 // specific data structures. To avoid virtual functions, it is not designed 46 // to be used polymorphically. 47 class MinidumpMemoryRange : public MemoryRange { 48 public: MinidumpMemoryRange()49 MinidumpMemoryRange() {} 50 MinidumpMemoryRange(const void * data,size_t length)51 MinidumpMemoryRange(const void* data, size_t length) 52 : MemoryRange(data, length) {} 53 54 // Returns a subrange of |length| bytes at |offset| bytes of this memory 55 // range, or an empty range if the subrange is out of bounds. 56 // This methods overrides the base implemementation in order to return 57 // an instance of MinidumpMemoryRange instead of MemoryRange. Subrange(size_t sub_offset,size_t sub_length)58 MinidumpMemoryRange Subrange(size_t sub_offset, size_t sub_length) const { 59 if (Covers(sub_offset, sub_length)) 60 return MinidumpMemoryRange(data() + sub_offset, sub_length); 61 return MinidumpMemoryRange(); 62 } 63 64 // Returns a subrange that covers the offset and length specified by 65 // |location|, or an empty range if the subrange is out of bounds. Subrange(const MDLocationDescriptor & location)66 MinidumpMemoryRange Subrange(const MDLocationDescriptor& location) const { 67 return MinidumpMemoryRange::Subrange(location.rva, location.data_size); 68 } 69 70 // Gets a STL string from a MDString at |sub_offset| bytes of this memory 71 // range. This method only works correctly for ASCII characters and does 72 // not convert between UTF-16 and UTF-8. GetAsciiMDString(size_t sub_offset)73 const std::string GetAsciiMDString(size_t sub_offset) const { 74 std::string str; 75 const MDString* md_str = GetData<MDString>(sub_offset); 76 if (md_str) { 77 const uint16_t* buffer = &md_str->buffer[0]; 78 for (uint32_t i = 0; i < md_str->length && buffer[i]; ++i) { 79 str.push_back(buffer[i]); 80 } 81 } 82 return str; 83 } 84 }; 85 86 } // namespace google_breakpad 87 88 #endif // TOOLS_LINUX_MD2CORE_MINIDUMP_MEMORY_RANGE_H_ 89