contrib/llvm/tools/lldb/source/Plugins/Process/Utility/RegisterContextThreadMemory.h

   1 //===-- RegisterContextThreadMemory.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 #ifndef lldb_RegisterContextThreadMemory_h_
  11 #define lldb_RegisterContextThreadMemory_h_
  12
  13 // C Includes
  14 // C++ Includes
  15 #include <vector>
  16
  17 // Other libraries and framework includes
  18 // Project includes
  19 #include "lldb/Symbol/SymbolContext.h"
  20 #include "lldb/Target/RegisterContext.h"
  21 #include "lldb/lldb-private.h"
  22
  23 namespace lldb_private {
  24
  25 class RegisterContextThreadMemory : public lldb_private::RegisterContext {
  26 public:
  27   RegisterContextThreadMemory(Thread &thread, lldb::addr_t register_data_addr);
  28
  29   ~RegisterContextThreadMemory() override;
  30
  31   void InvalidateAllRegisters() override;
  32
  33   size_t GetRegisterCount() override;
  34
  35   const RegisterInfo *GetRegisterInfoAtIndex(size_t reg) override;
  36
  37   size_t GetRegisterSetCount() override;
  38
  39   const RegisterSet *GetRegisterSet(size_t reg_set) override;
  40
  41   bool ReadRegister(const RegisterInfo *reg_info,
  42                     RegisterValue &reg_value) override;
  43
  44   bool WriteRegister(const RegisterInfo *reg_info,
  45                      const RegisterValue &reg_value) override;
  46
  47   // These two functions are used to implement "push" and "pop" of register
  48   // states.  They are used primarily
  49   // for expression evaluation, where we need to push a new state (storing the
  50   // old one in data_sp) and then
  51   // restoring the original state by passing the data_sp we got from
  52   // ReadAllRegisters to WriteAllRegisterValues.
  53   // ReadAllRegisters will do what is necessary to return a coherent set of
  54   // register values for this thread, which
  55   // may mean e.g. interrupting a thread that is sitting in a kernel trap.  That
  56   // is a somewhat disruptive operation,
  57   // so these API's should only be used when this behavior is needed.
  58
  59   bool ReadAllRegisterValues(lldb::DataBufferSP &data_sp) override;
  60
  61   bool WriteAllRegisterValues(const lldb::DataBufferSP &data_sp) override;
  62
  63   bool CopyFromRegisterContext(lldb::RegisterContextSP context);
  64
  65   uint32_t ConvertRegisterKindToRegisterNumber(lldb::RegisterKind kind,
  66                                                uint32_t num) override;
  67
  68   uint32_t NumSupportedHardwareBreakpoints() override;
  69
  70   uint32_t SetHardwareBreakpoint(lldb::addr_t addr, size_t size) override;
  71
  72   bool ClearHardwareBreakpoint(uint32_t hw_idx) override;
  73
  74   uint32_t NumSupportedHardwareWatchpoints() override;
  75
  76   uint32_t SetHardwareWatchpoint(lldb::addr_t addr, size_t size, bool read,
  77                                  bool write) override;
  78
  79   bool ClearHardwareWatchpoint(uint32_t hw_index) override;
  80
  81   bool HardwareSingleStep(bool enable) override;
  82
  83   Status ReadRegisterValueFromMemory(const lldb_private::RegisterInfo *reg_info,
  84                                      lldb::addr_t src_addr, uint32_t src_len,
  85                                      RegisterValue &reg_value) override;
  86
  87   Status WriteRegisterValueToMemory(const lldb_private::RegisterInfo *reg_info,
  88                                     lldb::addr_t dst_addr, uint32_t dst_len,
  89                                     const RegisterValue &reg_value) override;
  90
  91 protected:
  92   void UpdateRegisterContext();
  93
  94   lldb::ThreadWP m_thread_wp;
  95   lldb::RegisterContextSP m_reg_ctx_sp;
  96   lldb::addr_t m_register_data_addr;
  97   uint32_t m_stop_id;
  98
  99 private:
 100   DISALLOW_COPY_AND_ASSIGN(RegisterContextThreadMemory);
 101 };
 102
 103 } // namespace lldb_private
 104
 105 #endif // lldb_RegisterContextThreadMemory_h_