contrib/llvm/tools/lldb/include/lldb/Host/common/SoftwareBreakpoint.h

   1 //===-- SoftwareBreakpoint.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 liblldb_SoftwareBreakpoint_h_
  11 #define liblldb_SoftwareBreakpoint_h_
  12
  13 #include "NativeBreakpoint.h"
  14 #include "lldb/lldb-private-forward.h"
  15
  16 namespace lldb_private {
  17 class SoftwareBreakpoint : public NativeBreakpoint {
  18   friend class NativeBreakpointList;
  19
  20 public:
  21   static Status CreateSoftwareBreakpoint(NativeProcessProtocol &process,
  22                                          lldb::addr_t addr, size_t size_hint,
  23                                          NativeBreakpointSP &breakpoint_spn);
  24
  25   SoftwareBreakpoint(NativeProcessProtocol &process, lldb::addr_t addr,
  26                      const uint8_t *saved_opcodes, const uint8_t *trap_opcodes,
  27                      size_t opcode_size);
  28
  29 protected:
  30   Status DoEnable() override;
  31
  32   Status DoDisable() override;
  33
  34   bool IsSoftwareBreakpoint() const override;
  35
  36 private:
  37   /// Max number of bytes that a software trap opcode sequence can occupy.
  38   static const size_t MAX_TRAP_OPCODE_SIZE = 8;
  39
  40   NativeProcessProtocol &m_process;
  41   uint8_t m_saved_opcodes[MAX_TRAP_OPCODE_SIZE];
  42   uint8_t m_trap_opcodes[MAX_TRAP_OPCODE_SIZE];
  43   const size_t m_opcode_size;
  44
  45   static Status EnableSoftwareBreakpoint(NativeProcessProtocol &process,
  46                                          lldb::addr_t addr,
  47                                          size_t bp_opcode_size,
  48                                          const uint8_t *bp_opcode_bytes,
  49                                          uint8_t *saved_opcode_bytes);
  50 };
  51 }
  52
  53 #endif // #ifndef liblldb_SoftwareBreakpoint_h_