1 // Copyright (c) 2006, Google Inc. 2 // All rights reserved. 3 // 4 // Redistribution and use in source and binary forms, with or without 5 // modification, are permitted provided that the following conditions are 6 // met: 7 // 8 // * Redistributions of source code must retain the above copyright 9 // notice, this list of conditions and the following disclaimer. 10 // * Redistributions in binary form must reproduce the above 11 // copyright notice, this list of conditions and the following disclaimer 12 // in the documentation and/or other materials provided with the 13 // distribution. 14 // * Neither the name of Google Inc. nor the names of its 15 // contributors may be used to endorse or promote products derived from 16 // this software without specific prior written permission. 17 // 18 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 30 // minidump_generator.h: Create a minidump of the current MacOS process. 31 32 #ifndef CLIENT_MAC_GENERATOR_MINIDUMP_GENERATOR_H__ 33 #define CLIENT_MAC_GENERATOR_MINIDUMP_GENERATOR_H__ 34 35 #include <mach/mach.h> 36 #include <TargetConditionals.h> 37 38 #include <string> 39 40 #include "client/mac/handler/ucontext_compat.h" 41 #include "client/minidump_file_writer.h" 42 #include "common/memory_allocator.h" 43 #include "common/mac/macho_utilities.h" 44 #include "google_breakpad/common/minidump_format.h" 45 46 #include "dynamic_images.h" 47 #include "mach_vm_compat.h" 48 49 #if !TARGET_OS_IPHONE && (MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_7) 50 #define HAS_PPC_SUPPORT 51 #endif 52 #if defined(__arm__) 53 #define HAS_ARM_SUPPORT 54 #elif defined(__aarch64__) 55 #define HAS_ARM64_SUPPORT 56 #elif defined(__i386__) || defined(__x86_64__) 57 #define HAS_X86_SUPPORT 58 #endif 59 60 namespace google_breakpad { 61 62 using std::string; 63 64 // Use the REGISTER_FROM_THREADSTATE to access a register name from the 65 // breakpad_thread_state_t structure. 66 #if __DARWIN_OPAQUE_ARM_THREAD_STATE64 67 #define ARRAY_REGISTER_FROM_THREADSTATE(a, b, i) ((a)->__##b[i]) 68 #define GET_REGISTER_FROM_THREADSTATE_fp(a) \ 69 (reinterpret_cast<uintptr_t>((a)->__opaque_fp)) 70 #define GET_REGISTER_FROM_THREADSTATE_lr(a) \ 71 (reinterpret_cast<uintptr_t>((a)->__opaque_lr)) 72 #define GET_REGISTER_FROM_THREADSTATE_sp(a) \ 73 (reinterpret_cast<uintptr_t>((a)->__opaque_sp)) 74 #define GET_REGISTER_FROM_THREADSTATE_pc(a) \ 75 (reinterpret_cast<uintptr_t>((a)->__opaque_pc)) 76 #define GET_REGISTER_FROM_THREADSTATE_cpsr(a) ((a)->__cpsr) 77 #define GET_REGISTER_FROM_THREADSTATE_flags(a) ((a)->__opaque_flags) 78 #define REGISTER_FROM_THREADSTATE(a, b) (GET_REGISTER_FROM_THREADSTATE_##b(a)) 79 #elif __DARWIN_UNIX03 || TARGET_CPU_X86_64 || TARGET_CPU_PPC64 || TARGET_CPU_ARM 80 // In The 10.5 SDK Headers Apple prepended __ to the variable names in the 81 // i386_thread_state_t structure. There's no good way to tell what version of 82 // the SDK we're compiling against so we just toggle on the same preprocessor 83 // symbol Apple's headers use. 84 #define REGISTER_FROM_THREADSTATE(a, b) ((a)->__ ## b) 85 #define ARRAY_REGISTER_FROM_THREADSTATE(a, b, i) \ 86 REGISTER_FROM_THREADSTATE(a, b[i]) 87 #else 88 #define REGISTER_FROM_THREADSTATE(a, b) (a->b) 89 #define ARRAY_REGISTER_FROM_THREADSTATE(a, b, i) \ 90 REGISTER_FROM_THREADSTATE(a, b[i]) 91 #endif 92 93 // Creates a minidump file of the current process. If there is exception data, 94 // use SetExceptionInformation() to add this to the minidump. The minidump 95 // file is generated by the Write() function. 96 // Usage: 97 // MinidumpGenerator minidump(); 98 // minidump.Write("/tmp/minidump"); 99 // 100 class MinidumpGenerator { 101 public: 102 MinidumpGenerator(); 103 MinidumpGenerator(mach_port_t crashing_task, mach_port_t handler_thread); 104 105 virtual ~MinidumpGenerator(); 106 107 // Return <dir>/<unique_name>.dmp 108 // Sets |unique_name| (if requested) to the unique name for the minidump 109 static string UniqueNameInDirectory(const string &dir, string *unique_name); 110 111 // Write out the minidump into |path| 112 // All of the components of |path| must exist and be writable 113 // Return true if successful, false otherwise 114 bool Write(const char *path); 115 116 // Specify some exception information, if applicable SetExceptionInformation(int type,int code,int subcode,mach_port_t thread_name)117 void SetExceptionInformation(int type, int code, int subcode, 118 mach_port_t thread_name) { 119 exception_type_ = type; 120 exception_code_ = code; 121 exception_subcode_ = subcode; 122 exception_thread_ = thread_name; 123 } 124 125 // Specify the task context. If |task_context| is not NULL, it will be used 126 // to retrieve the context of the current thread, instead of using 127 // |thread_get_state|. 128 void SetTaskContext(breakpad_ucontext_t *task_context); 129 130 // Gather system information. This should be call at least once before using 131 // the MinidumpGenerator class. 132 static void GatherSystemInformation(); 133 134 protected: 135 // Overridable Stream writers 136 virtual bool WriteExceptionStream(MDRawDirectory *exception_stream); 137 138 // Overridable Helper 139 virtual bool WriteThreadStream(mach_port_t thread_id, MDRawThread *thread); 140 141 private: 142 typedef bool (MinidumpGenerator::*WriteStreamFN)(MDRawDirectory *); 143 144 // Stream writers 145 bool WriteThreadListStream(MDRawDirectory *thread_list_stream); 146 bool WriteMemoryListStream(MDRawDirectory *memory_list_stream); 147 bool WriteSystemInfoStream(MDRawDirectory *system_info_stream); 148 bool WriteModuleListStream(MDRawDirectory *module_list_stream); 149 bool WriteMiscInfoStream(MDRawDirectory *misc_info_stream); 150 bool WriteBreakpadInfoStream(MDRawDirectory *breakpad_info_stream); 151 152 // Helpers 153 uint64_t CurrentPCForStack(breakpad_thread_state_data_t state); 154 bool GetThreadState(thread_act_t target_thread, thread_state_t state, 155 mach_msg_type_number_t *count); 156 bool WriteStackFromStartAddress(mach_vm_address_t start_addr, 157 MDMemoryDescriptor *stack_location); 158 bool WriteStack(breakpad_thread_state_data_t state, 159 MDMemoryDescriptor *stack_location); 160 bool WriteContext(breakpad_thread_state_data_t state, 161 MDLocationDescriptor *register_location); 162 bool WriteCVRecord(MDRawModule *module, int cpu_type, 163 const char *module_path, bool in_memory); 164 bool WriteModuleStream(unsigned int index, MDRawModule *module); 165 size_t CalculateStackSize(mach_vm_address_t start_addr); 166 int FindExecutableModule(); 167 168 // Per-CPU implementations of these methods 169 #ifdef HAS_ARM_SUPPORT 170 bool WriteStackARM(breakpad_thread_state_data_t state, 171 MDMemoryDescriptor *stack_location); 172 bool WriteContextARM(breakpad_thread_state_data_t state, 173 MDLocationDescriptor *register_location); 174 uint64_t CurrentPCForStackARM(breakpad_thread_state_data_t state); 175 #endif 176 #ifdef HAS_ARM64_SUPPORT 177 bool WriteStackARM64(breakpad_thread_state_data_t state, 178 MDMemoryDescriptor *stack_location); 179 bool WriteContextARM64(breakpad_thread_state_data_t state, 180 MDLocationDescriptor *register_location); 181 uint64_t CurrentPCForStackARM64(breakpad_thread_state_data_t state); 182 #endif 183 #ifdef HAS_PPC_SUPPORT 184 bool WriteStackPPC(breakpad_thread_state_data_t state, 185 MDMemoryDescriptor *stack_location); 186 bool WriteContextPPC(breakpad_thread_state_data_t state, 187 MDLocationDescriptor *register_location); 188 uint64_t CurrentPCForStackPPC(breakpad_thread_state_data_t state); 189 bool WriteStackPPC64(breakpad_thread_state_data_t state, 190 MDMemoryDescriptor *stack_location); 191 bool WriteContextPPC64(breakpad_thread_state_data_t state, 192 MDLocationDescriptor *register_location); 193 uint64_t CurrentPCForStackPPC64(breakpad_thread_state_data_t state); 194 #endif 195 #ifdef HAS_X86_SUPPORT 196 bool WriteStackX86(breakpad_thread_state_data_t state, 197 MDMemoryDescriptor *stack_location); 198 bool WriteContextX86(breakpad_thread_state_data_t state, 199 MDLocationDescriptor *register_location); 200 uint64_t CurrentPCForStackX86(breakpad_thread_state_data_t state); 201 bool WriteStackX86_64(breakpad_thread_state_data_t state, 202 MDMemoryDescriptor *stack_location); 203 bool WriteContextX86_64(breakpad_thread_state_data_t state, 204 MDLocationDescriptor *register_location); 205 uint64_t CurrentPCForStackX86_64(breakpad_thread_state_data_t state); 206 #endif 207 208 // disallow copy ctor and operator= 209 explicit MinidumpGenerator(const MinidumpGenerator &); 210 void operator=(const MinidumpGenerator &); 211 212 protected: 213 // Use this writer to put the data to disk 214 MinidumpFileWriter writer_; 215 216 private: 217 // Exception information 218 int exception_type_; 219 int exception_code_; 220 int exception_subcode_; 221 mach_port_t exception_thread_; 222 mach_port_t crashing_task_; 223 mach_port_t handler_thread_; 224 225 // CPU type of the task being dumped. 226 cpu_type_t cpu_type_; 227 228 // System information 229 static char build_string_[16]; 230 static int os_major_version_; 231 static int os_minor_version_; 232 static int os_build_number_; 233 234 // Context of the task to dump. 235 breakpad_ucontext_t *task_context_; 236 237 // Information about dynamically loaded code 238 DynamicImages *dynamic_images_; 239 240 // PageAllocator makes it possible to allocate memory 241 // directly from the system, even while handling an exception. 242 mutable PageAllocator allocator_; 243 244 protected: 245 // Blocks of memory written to the dump. These are all currently 246 // written while writing the thread list stream, but saved here 247 // so a memory list stream can be written afterwards. 248 wasteful_vector<MDMemoryDescriptor> memory_blocks_; 249 }; 250 251 } // namespace google_breakpad 252 253 #endif // CLIENT_MAC_GENERATOR_MINIDUMP_GENERATOR_H__ 254