Debugger: use debug break slots to break at function exit.

src/arm64/assembler-arm64.cc

 // Copyright 2013 the V8 project authors. 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.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
@@ skipping 2883 matching lines @@
     *p += pc_delta;
   }
 
   // Pending relocation entries are also relative, no need to relocate.
 }
 
 
 void Assembler::RecordRelocInfo(RelocInfo::Mode rmode, intptr_t data) {
   // We do not try to reuse pool constants.
   RelocInfo rinfo(reinterpret_cast<byte*>(pc_), rmode, data, NULL);
-  if (((rmode >= RelocInfo::JS_RETURN) &&
+  if (((rmode >= RelocInfo::COMMENT) &&
        (rmode <= RelocInfo::DEBUG_BREAK_SLOT_AT_CONSTRUCT_CALL)) ||
       (rmode == RelocInfo::INTERNAL_REFERENCE) ||
       (rmode == RelocInfo::CONST_POOL) || (rmode == RelocInfo::VENEER_POOL) ||
       (rmode == RelocInfo::DEOPT_REASON) ||
       (rmode == RelocInfo::GENERATOR_CONTINUATION)) {
     // Adjust code for new modes.
-    DCHECK(RelocInfo::IsDebugBreakSlot(rmode) || RelocInfo::IsJSReturn(rmode) ||
-           RelocInfo::IsComment(rmode) || RelocInfo::IsDeoptReason(rmode) ||
-           RelocInfo::IsPosition(rmode) ||
+    DCHECK(RelocInfo::IsDebugBreakSlot(rmode) || RelocInfo::IsComment(rmode) ||
+           RelocInfo::IsDeoptReason(rmode) || RelocInfo::IsPosition(rmode) ||
            RelocInfo::IsInternalReference(rmode) ||
            RelocInfo::IsConstPool(rmode) || RelocInfo::IsVeneerPool(rmode) ||
            RelocInfo::IsGeneratorContinuation(rmode));
     // These modes do not need an entry in the constant pool.
   } else {
     constpool_.RecordEntry(data, rmode);
     // Make sure the constant pool is not emitted in place of the next
     // instruction for which we just recorded relocation info.
     BlockConstPoolFor(1);
   }
@@ skipping 246 matching lines @@
   movk(scratch, (target_offset >> 32) & 0xFFFF, 32);
   DCHECK((target_offset >> 48) == 0);
   add(rd, rd, scratch);
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM64