[debugger] introduce abstract interface for break location.

src/ppc/assembler-ppc-inl.h

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions
 // are met:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 //
@@ skipping 310 matching lines @@
     // mov sequence
     // Currently used only by deserializer, no need to flush.
     Assembler::set_target_address_at(isolate_, pc_, host_, NULL,
                                      SKIP_ICACHE_FLUSH);
   } else {
     Assembler::set_target_address_at(isolate_, pc_, host_, NULL);
   }
 }
 
 
-bool RelocInfo::IsPatchedReturnSequence() {
-  //
-  // The patched return sequence is defined by
-  // BreakLocation::SetDebugBreakAtReturn()
-  // FIXED_SEQUENCE
-
-  Instr instr0 = Assembler::instr_at(pc_);
-  Instr instr1 = Assembler::instr_at(pc_ + 1 * Assembler::kInstrSize);
-#if V8_TARGET_ARCH_PPC64
-  Instr instr3 = Assembler::instr_at(pc_ + (3 * Assembler::kInstrSize));
-  Instr instr4 = Assembler::instr_at(pc_ + (4 * Assembler::kInstrSize));
-  Instr binstr = Assembler::instr_at(pc_ + (7 * Assembler::kInstrSize));
-#else
-  Instr binstr = Assembler::instr_at(pc_ + 4 * Assembler::kInstrSize);
-#endif
-  bool patched_return =
-      ((instr0 & kOpcodeMask) == ADDIS && (instr1 & kOpcodeMask) == ORI &&
-#if V8_TARGET_ARCH_PPC64
-       (instr3 & kOpcodeMask) == ORIS && (instr4 & kOpcodeMask) == ORI &&
-#endif
-       (binstr == 0x7d821008));  // twge r2, r2
-
-  // printf("IsPatchedReturnSequence: %d\n", patched_return);
-  return patched_return;
-}
-
-
-bool RelocInfo::IsPatchedDebugBreakSlotSequence() {
-  Instr current_instr = Assembler::instr_at(pc_);
-  return !Assembler::IsNop(current_instr, Assembler::DEBUG_BREAK_NOP);
-}
-
-
 void RelocInfo::Visit(Isolate* isolate, ObjectVisitor* visitor) {
   RelocInfo::Mode mode = rmode();
   if (mode == RelocInfo::EMBEDDED_OBJECT) {
     visitor->VisitEmbeddedPointer(this);
   } else if (RelocInfo::IsCodeTarget(mode)) {
     visitor->VisitCodeTarget(this);
   } else if (mode == RelocInfo::CELL) {
     visitor->VisitCell(this);
   } else if (mode == RelocInfo::EXTERNAL_REFERENCE) {
     visitor->VisitExternalReference(this);
@@ skipping 345 matching lines @@
     }
 #endif
     return;
   }
   UNREACHABLE();
 }
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_PPC_ASSEMBLER_PPC_INL_H_