X64: Implement debugger hooks.

test/cctest/test-debug.cc

Index: test/cctest/test-debug.cc
diff --git a/test/cctest/test-debug.cc b/test/cctest/test-debug.cc
index a86317ad3861582b9a0e62fc4fe41018f8dd7d9c..f5e4f3a4fcd50dc23512c969d3a1f932a7334d0d 100644
--- a/test/cctest/test-debug.cc
+++ b/test/cctest/test-debug.cc
@@ -487,9 +487,7 @@ void CheckDebugBreakFunction(DebugLocalContext* env,
     CHECK_EQ(debug_break,
         Code::GetCodeFromTargetAddress(it1.it()->rinfo()->target_address()));
   } else {
-    // TODO(1240753): Make the test architecture independent or split
-    // parts of the debugger into architecture dependent files.
-    CHECK_EQ(0xE8, *(it1.rinfo()->pc()));
+    CHECK(Debug::IsDebugBreakAtReturn(it1.it()->rinfo()));
   }
 
   // Clear the break point and check that the debug break function is no longer
@@ -501,9 +499,7 @@ void CheckDebugBreakFunction(DebugLocalContext* env,
   it2.FindBreakLocationFromPosition(position);
   CHECK_EQ(mode, it2.it()->rinfo()->rmode());
   if (mode == v8::internal::RelocInfo::JS_RETURN) {
-    // TODO(1240753): Make the test architecture independent or split
-    // parts of the debugger into architecture dependent files.
-    CHECK_NE(0xE8, *(it2.rinfo()->pc()));
+    CHECK(!Debug::IsDebugBreakAtReturn(it2.it()->rinfo()));
   }
 }