[lldb] Rename NativeRegisterContext{Watchpoint => DBReg}_x86

[mgorny]

Fixed the top line of header in .cpp.

[emaste]

No objection from me

lldb/source/Plugins/Process/FreeBSD/NativeRegisterContextFreeBSD_x86_64.h

 #include <sys/types.h>
 #include <machine/reg.h>
 // clang-format on
 
 #include <array>
 
 #include "Plugins/Process/FreeBSD/NativeRegisterContextFreeBSD.h"
 #include "Plugins/Process/Utility/RegisterContext_x86.h"
-#include "Plugins/Process/Utility/NativeRegisterContextWatchpoint_x86.h"
+#include "Plugins/Process/Utility/NativeRegisterContextDBReg_x86.h"
 #include "Plugins/Process/Utility/lldb-x86-register-enums.h"
 
 #define LLDB_INVALID_XSAVE_OFFSET UINT32_MAX
 
 namespace lldb_private {
 namespace process_freebsd {
 
 class NativeProcessFreeBSD;
 
 class NativeRegisterContextFreeBSD_x86_64
     : public NativeRegisterContextFreeBSD,
-      public NativeRegisterContextWatchpoint_x86 {
+      public NativeRegisterContextDBReg_x86 {
 public:
   NativeRegisterContextFreeBSD_x86_64(const ArchSpec &target_arch,
                                       NativeThreadProtocol &native_thread);
   uint32_t GetRegisterSetCount() const override;
 
   const RegisterSet *GetRegisterSet(uint32_t set_index) const override;
 
   Status ReadRegister(const RegisterInfo *reg_info,

lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_x86_64.h

 //===-- NativeRegisterContextLinux_x86_64.h ---------------------*- C++ -*-===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 
 #if defined(__i386__) || defined(__x86_64__)
 
 #ifndef lldb_NativeRegisterContextLinux_x86_64_h
 #define lldb_NativeRegisterContextLinux_x86_64_h
 
 #include "Plugins/Process/Linux/NativeRegisterContextLinux.h"
-#include "Plugins/Process/Utility/NativeRegisterContextWatchpoint_x86.h"
+#include "Plugins/Process/Utility/NativeRegisterContextDBReg_x86.h"
 #include "Plugins/Process/Utility/RegisterContext_x86.h"
 #include "Plugins/Process/Utility/lldb-x86-register-enums.h"
 #include <sys/uio.h>
 
 namespace lldb_private {
 namespace process_linux {
 
 class NativeProcessLinux;
 
 class NativeRegisterContextLinux_x86_64
     : public NativeRegisterContextLinux,
-      public NativeRegisterContextWatchpoint_x86 {
+      public NativeRegisterContextDBReg_x86 {
 public:
   NativeRegisterContextLinux_x86_64(const ArchSpec &target_arch,
                                     NativeThreadProtocol &native_thread);
 
   uint32_t GetRegisterSetCount() const override;
 
   const RegisterSet *GetRegisterSet(uint32_t set_index) const override;
 

lldb/source/Plugins/Process/NetBSD/NativeRegisterContextNetBSD_x86_64.h

 #include <sys/ptrace.h>
 #include <machine/reg.h>
 // clang-format on
 
 #include <array>
 
 #include "Plugins/Process/NetBSD/NativeRegisterContextNetBSD.h"
 #include "Plugins/Process/Utility/RegisterContext_x86.h"
-#include "Plugins/Process/Utility/NativeRegisterContextWatchpoint_x86.h"
+#include "Plugins/Process/Utility/NativeRegisterContextDBReg_x86.h"
 #include "Plugins/Process/Utility/lldb-x86-register-enums.h"
 
 namespace lldb_private {
 namespace process_netbsd {
 
 class NativeProcessNetBSD;
 
 class NativeRegisterContextNetBSD_x86_64
     : public NativeRegisterContextNetBSD,
-      public NativeRegisterContextWatchpoint_x86 {
+      public NativeRegisterContextDBReg_x86 {
 public:
   NativeRegisterContextNetBSD_x86_64(const ArchSpec &target_arch,
                                      NativeThreadProtocol &native_thread);
   uint32_t GetRegisterSetCount() const override;
 
   const RegisterSet *GetRegisterSet(uint32_t set_index) const override;
 
   Status ReadRegister(const RegisterInfo *reg_info,

lldb/source/Plugins/Process/Utility/CMakeLists.txt

 add_lldb_library(lldbPluginProcessUtility
   AuxVector.cpp
   DynamicRegisterInfo.cpp
   FreeBSDSignals.cpp
   GDBRemoteSignals.cpp
   HistoryThread.cpp
   HistoryUnwind.cpp
   InferiorCallPOSIX.cpp
   LinuxProcMaps.cpp
   LinuxSignals.cpp
   MipsLinuxSignals.cpp
   NativeProcessSoftwareSingleStep.cpp
+  NativeRegisterContextDBReg_x86.cpp
   NativeRegisterContextRegisterInfo.cpp
-  NativeRegisterContextWatchpoint_x86.cpp
   NetBSDSignals.cpp
   RegisterContext_x86.cpp
   RegisterContextDarwin_arm.cpp
   RegisterContextDarwin_arm64.cpp
   RegisterContextDarwin_i386.cpp
   RegisterContextDarwin_x86_64.cpp
   RegisterContextDummy.cpp
   RegisterContextFreeBSD_i386.cpp

lldb/source/Plugins/Process/Utility/NativeRegisterContextDBReg_x86.h

-//===-- NativeRegisterContextWatchpoint_x86.h -------------------*- C++ -*-===//
+//===-- NativeRegisterContextDBReg_x86.h ------------------------*- C++ -*-===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef lldb_NativeRegisterContextWatchpoint_x86_h
-#define lldb_NativeRegisterContextWatchpoint_x86_h
+#ifndef lldb_NativeRegisterContextDBReg_x86_h
+#define lldb_NativeRegisterContextDBReg_x86_h
 
 #include "Plugins/Process/Utility/NativeRegisterContextRegisterInfo.h"
 
 namespace lldb_private {
 
-class NativeRegisterContextWatchpoint_x86
+class NativeRegisterContextDBReg_x86
     : public virtual NativeRegisterContextRegisterInfo {
 public:
   Status IsWatchpointHit(uint32_t wp_index, bool &is_hit) override;
 
   Status GetWatchpointHitIndex(uint32_t &wp_index,
                                lldb::addr_t trap_addr) override;
 
   Status IsWatchpointVacant(uint32_t wp_index, bool &is_vacant) override;
public:
 
   uint32_t NumSupportedHardwareWatchpoints() override;
 
   const RegisterInfo *GetDR(int num) const;
 };
 
 } // namespace lldb_private
 
-#endif // #ifndef lldb_NativeRegisterContextWatchpoint_x86_h
+#endif // #ifndef lldb_NativeRegisterContextDBReg_x86_h

lldb/source/Plugins/Process/Utility/NativeRegisterContextDBReg_x86.cpp

-//===-- NativeRegisterContextWatchpoint_x86.cpp ---------------------------===//
+//===-- NativeRegisterContextDBReg_x86.cpp --------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 
-#include "NativeRegisterContextWatchpoint_x86.h"
+#include "NativeRegisterContextDBReg_x86.h"
 
 #include "lldb/Utility/Log.h"
 #include "lldb/Utility/RegisterValue.h"
 
 #include "Plugins/Process/Utility/lldb-x86-register-enums.h"
 
 using namespace lldb_private;
 
static inline uint64_t GetWatchControlBitmask(uint32_t wp_index) {
   // val: SSTTSSTTSSTTSSTTxxxxxxGLGLGLGLGL
   // wp.: 3333222211110000xxxxxxEE33221100
   return GetBothEnableBitMask(wp_index) | (0xF << (16 + 4 * wp_index));
 }
 
 // Bit mask for control bits regarding all watchpoints.
 static constexpr uint64_t watchpoint_all_control_bit_mask = 0xFFFF00FF;
 
-const RegisterInfo *NativeRegisterContextWatchpoint_x86::GetDR(int num) const {
+const RegisterInfo *NativeRegisterContextDBReg_x86::GetDR(int num) const {
   assert(num >= 0 && num <= 7);
   switch (GetRegisterInfoInterface().GetTargetArchitecture().GetMachine()) {
   case llvm::Triple::x86:
     return GetRegisterInfoAtIndex(lldb_dr0_i386 + num);
   case llvm::Triple::x86_64:
     return GetRegisterInfoAtIndex(lldb_dr0_x86_64 + num);
   default:
     llvm_unreachable("Unhandled target architecture.");
   }
 }
 
-Status NativeRegisterContextWatchpoint_x86::IsWatchpointHit(uint32_t wp_index,
-                                                            bool &is_hit) {
+Status NativeRegisterContextDBReg_x86::IsWatchpointHit(uint32_t wp_index,
   if (wp_index >= NumSupportedHardwareWatchpoints())
     return Status("Watchpoint index out of range");
 
   RegisterValue dr6;
   Status error = ReadRegister(GetDR(6), dr6);
   if (error.Fail())
     is_hit = false;
   else
     is_hit = dr6.GetAsUInt64() & GetStatusBit(wp_index);
 
   return error;
 }
 
-Status NativeRegisterContextWatchpoint_x86::GetWatchpointHitIndex(
-    uint32_t &wp_index, lldb::addr_t trap_addr) {
+Status
+NativeRegisterContextDBReg_x86::GetWatchpointHitIndex(uint32_t &wp_index,
+                                                      lldb::addr_t trap_addr) {
   uint32_t num_hw_wps = NumSupportedHardwareWatchpoints();
   for (wp_index = 0; wp_index < num_hw_wps; ++wp_index) {
     bool is_hit;
     Status error = IsWatchpointHit(wp_index, is_hit);
     if (error.Fail()) {
       wp_index = LLDB_INVALID_INDEX32;
       return error;
     } else if (is_hit) {
       return error;
     }
   }
   wp_index = LLDB_INVALID_INDEX32;
   return Status();
 }
 
-Status
-NativeRegisterContextWatchpoint_x86::IsWatchpointVacant(uint32_t wp_index,
+Status NativeRegisterContextDBReg_x86::IsWatchpointVacant(uint32_t wp_index,
                                                           bool &is_vacant) {
   if (wp_index >= NumSupportedHardwareWatchpoints())
     return Status("Watchpoint index out of range");
 
   RegisterValue dr7;
   Status error = ReadRegister(GetDR(7), dr7);
   if (error.Fail())
     is_vacant = false;
   else
     is_vacant = !(dr7.GetAsUInt64() & GetEnableBit(wp_index));
 
   return error;
 }
 
-Status NativeRegisterContextWatchpoint_x86::SetHardwareWatchpointWithIndex(
+Status NativeRegisterContextDBReg_x86::SetHardwareWatchpointWithIndex(
     lldb::addr_t addr, size_t size, uint32_t watch_flags, uint32_t wp_index) {
 
   if (wp_index >= NumSupportedHardwareWatchpoints())
     return Status("Watchpoint index out of range");
 
   // Read only watchpoints aren't supported on x86_64. Fall back to read/write
   // waitchpoints instead.
   // TODO: Add logic to detect when a write happens and ignore that watchpoint
Status NativeRegisterContextDBReg_x86::SetHardwareWatchpointWithIndex(
 
   error = WriteRegister(GetDR(7), RegisterValue(control_bits));
   if (error.Fail())
     return error;
 
   return error;
 }
 
-bool NativeRegisterContextWatchpoint_x86::ClearHardwareWatchpoint(
+bool NativeRegisterContextDBReg_x86::ClearHardwareWatchpoint(
     uint32_t wp_index) {
   if (wp_index >= NumSupportedHardwareWatchpoints())
     return false;
 
   RegisterValue dr7;
   Status error = ReadRegister(GetDR(7), dr7);
   if (error.Fail())
     return false;
 
   return WriteRegister(GetDR(7), RegisterValue(dr7.GetAsUInt64() &
                                                ~GetBothEnableBitMask(wp_index)))
       .Success();
 }
 
-Status
-NativeRegisterContextWatchpoint_x86::ClearWatchpointHit(uint32_t wp_index) {
+Status NativeRegisterContextDBReg_x86::ClearWatchpointHit(uint32_t wp_index) {
   if (wp_index >= NumSupportedHardwareWatchpoints())
     return Status("Watchpoint index out of range");
 
   RegisterValue dr6;
   Status error = ReadRegister(GetDR(6), dr6);
   if (error.Fail())
     return error;
 
   return WriteRegister(
       GetDR(6), RegisterValue(dr6.GetAsUInt64() & ~GetStatusBit(wp_index)));
 }
 
-Status NativeRegisterContextWatchpoint_x86::ClearAllHardwareWatchpoints() {
+Status NativeRegisterContextDBReg_x86::ClearAllHardwareWatchpoints() {
   RegisterValue dr7;
   Status error = ReadRegister(GetDR(7), dr7);
   if (error.Fail())
     return error;
   return WriteRegister(
       GetDR(7),
       RegisterValue(dr7.GetAsUInt64() & ~watchpoint_all_control_bit_mask));
 }
 
-uint32_t NativeRegisterContextWatchpoint_x86::SetHardwareWatchpoint(
+uint32_t NativeRegisterContextDBReg_x86::SetHardwareWatchpoint(
     lldb::addr_t addr, size_t size, uint32_t watch_flags) {
   Log *log(GetLogIfAllCategoriesSet(LIBLLDB_LOG_WATCHPOINTS));
   const uint32_t num_hw_watchpoints = NumSupportedHardwareWatchpoints();
   for (uint32_t wp_index = 0; wp_index < num_hw_watchpoints; ++wp_index) {
     bool is_vacant;
     Status error = IsWatchpointVacant(wp_index, is_vacant);
     if (is_vacant) {
       error = SetHardwareWatchpointWithIndex(addr, size, watch_flags, wp_index);
       if (error.Success())
         return wp_index;
     }
     if (error.Fail() && log) {
-      LLDB_LOGF(log, "NativeRegisterContextWatchpoint_x86::%s Error: %s",
+      LLDB_LOGF(log, "NativeRegisterContextDBReg_x86::%s Error: %s",
                 __FUNCTION__, error.AsCString());
     }
   }
   return LLDB_INVALID_INDEX32;
 }
 
 lldb::addr_t
-NativeRegisterContextWatchpoint_x86::GetWatchpointAddress(uint32_t wp_index) {
+NativeRegisterContextDBReg_x86::GetWatchpointAddress(uint32_t wp_index) {
   if (wp_index >= NumSupportedHardwareWatchpoints())
     return LLDB_INVALID_ADDRESS;
   RegisterValue drN;
   if (ReadRegister(GetDR(wp_index), drN).Fail())
     return LLDB_INVALID_ADDRESS;
   return drN.GetAsUInt64();
 }
 
-uint32_t
-NativeRegisterContextWatchpoint_x86::NumSupportedHardwareWatchpoints() {
+uint32_t NativeRegisterContextDBReg_x86::NumSupportedHardwareWatchpoints() {
   // Available debug address registers: dr0, dr1, dr2, dr3
   return 4;
 }