1 //===-- MachException.h -----------------------------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // Created by Greg Clayton on 6/18/07. 11 // 12 //===----------------------------------------------------------------------===// 13 14 15 #ifndef __MachException_h__ 16 #define __MachException_h__ 17 18 #include <mach/mach.h> 19 #include <vector> 20 21 class MachProcess; 22 class PThreadMutex; 23 24 typedef union MachMessageTag 25 { 26 mach_msg_header_t hdr; 27 char data[1024]; 28 } MachMessage; 29 30 31 class MachException 32 { 33 public: 34 35 struct PortInfo 36 { 37 exception_mask_t mask; // the exception mask for this device which may be a subset of EXC_MASK_ALL... 38 exception_mask_t masks[EXC_TYPES_COUNT]; 39 mach_port_t ports[EXC_TYPES_COUNT]; 40 exception_behavior_t behaviors[EXC_TYPES_COUNT]; 41 thread_state_flavor_t flavors[EXC_TYPES_COUNT]; 42 mach_msg_type_number_t count; 43 44 kern_return_t Save(task_t task); 45 kern_return_t Restore(task_t task); 46 }; 47 48 struct Data 49 { 50 task_t task_port; 51 thread_t thread_port; 52 exception_type_t exc_type; 53 std::vector<mach_exception_data_type_t> exc_data; 54 Data() : 55 task_port(TASK_NULL), 56 thread_port(THREAD_NULL), 57 exc_type(0), 58 exc_data() 59 { 60 } 61 62 void Clear() 63 { 64 task_port = TASK_NULL; 65 thread_port = THREAD_NULL; 66 exc_type = 0; 67 exc_data.clear(); 68 } 69 bool IsValid() const 70 { 71 return task_port != TASK_NULL && 72 thread_port != THREAD_NULL && 73 exc_type != 0; 74 } 75 // Return the SoftSignal for this MachException data, or zero if there is none 76 int SoftSignal() const 77 { 78 if (exc_type == EXC_SOFTWARE && exc_data.size() == 2 && exc_data[0] == EXC_SOFT_SIGNAL) 79 return static_cast<int>(exc_data[1]); 80 return 0; 81 } 82 bool IsBreakpoint() const 83 { 84 return (exc_type == EXC_BREAKPOINT || ((exc_type == EXC_SOFTWARE) && exc_data[0] == 1)); 85 } 86 void Dump() const; 87 void DumpStopReason() const; 88 bool GetStopInfo(struct DNBThreadStopInfo *stop_info) const; 89 }; 90 91 struct Message 92 { 93 MachMessage exc_msg; 94 MachMessage reply_msg; 95 Data state; 96 97 Message() : 98 state() 99 { 100 memset(&exc_msg, 0, sizeof(exc_msg)); 101 memset(&reply_msg, 0, sizeof(reply_msg)); 102 } 103 bool CatchExceptionRaise(task_t task); 104 void Dump() const; 105 kern_return_t Reply (MachProcess *process, int signal); 106 kern_return_t Receive( mach_port_t receive_port, 107 mach_msg_option_t options, 108 mach_msg_timeout_t timeout, 109 mach_port_t notify_port = MACH_PORT_NULL); 110 111 typedef std::vector<Message> collection; 112 typedef collection::iterator iterator; 113 typedef collection::const_iterator const_iterator; 114 }; 115 116 enum 117 { 118 e_actionForward, // Forward signal to inferior process 119 e_actionStop, // Stop when this signal is received 120 }; 121 struct Action 122 { 123 task_t task_port; // Set to TASK_NULL for any TASK 124 thread_t thread_port; // Set to THREAD_NULL for any thread 125 exception_type_t exc_mask; // Mach exception mask to watch for 126 std::vector<mach_exception_data_type_t> exc_data_mask; // Mask to apply to exception data, or empty to ignore exc_data value for exception 127 std::vector<mach_exception_data_type_t> exc_data_value; // Value to compare to exception data after masking, or empty to ignore exc_data value for exception 128 uint8_t flags; // Action flags describing what to do with the exception 129 }; 130 static const char *Name(exception_type_t exc_type); 131 }; 132 133 #endif 134