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