[interpreter] First implementation of stack unwinding.

src/x64/builtins-x64.cc

Index: src/x64/builtins-x64.cc
diff --git a/src/x64/builtins-x64.cc b/src/x64/builtins-x64.cc
index 33a11e3902494ba69decf931524367fbd6534d04..06fd59468dbc5b437538a0c0703e4a3384a786e7 100644
--- a/src/x64/builtins-x64.cc
+++ b/src/x64/builtins-x64.cc
@@ -810,29 +810,7 @@ void Builtins::Generate_InterpreterPushArgsAndConstruct(MacroAssembler* masm) {
 }
 
 
-static void Generate_InterpreterNotifyDeoptimizedHelper(
-    MacroAssembler* masm, Deoptimizer::BailoutType type) {
-  // Enter an internal frame.
-  {
-    FrameScope scope(masm, StackFrame::INTERNAL);
-    __ Push(kInterpreterAccumulatorRegister);  // Save accumulator register.
-
-    // Pass the deoptimization type to the runtime system.
-    __ Push(Smi::FromInt(static_cast<int>(type)));
-
-    __ CallRuntime(Runtime::kNotifyDeoptimized);
-
-    __ Pop(kInterpreterAccumulatorRegister);  // Restore accumulator register.
-    // Tear down internal frame.
-  }
-
-  // Drop state (we don't use these for interpreter deopts) and push PC at top
-  // of stack (to simulate initial call to bytecode handler in interpreter entry
-  // trampoline).
-  __ Pop(rbx);
-  __ Drop(1);
-  __ Push(rbx);
-
+static void Generate_EnterBytecodeDispatch(MacroAssembler* masm) {
   // Initialize register file register and dispatch table register.
   __ movp(kInterpreterRegisterFileRegister, rbp);
   __ addp(kInterpreterRegisterFileRegister,
@@ -883,6 +861,34 @@ static void Generate_InterpreterNotifyDeoptimizedHelper(
 }
 
 
+static void Generate_InterpreterNotifyDeoptimizedHelper(
+    MacroAssembler* masm, Deoptimizer::BailoutType type) {
+  // Enter an internal frame.
+  {
+    FrameScope scope(masm, StackFrame::INTERNAL);
+    __ Push(kInterpreterAccumulatorRegister);  // Save accumulator register.
+
+    // Pass the deoptimization type to the runtime system.
+    __ Push(Smi::FromInt(static_cast<int>(type)));
+
+    __ CallRuntime(Runtime::kNotifyDeoptimized);
+
+    __ Pop(kInterpreterAccumulatorRegister);  // Restore accumulator register.
+    // Tear down internal frame.
+  }
+
+  // Drop state (we don't use these for interpreter deopts) and push PC at top
+  // of stack (to simulate initial call to bytecode handler in interpreter entry
+  // trampoline).
+  __ Pop(rbx);
+  __ Drop(1);
+  __ Push(rbx);
+
+  // Enter the bytecode dispatch.
+  Generate_EnterBytecodeDispatch(masm);
+}
+
+
 void Builtins::Generate_InterpreterNotifyDeoptimized(MacroAssembler* masm) {
   Generate_InterpreterNotifyDeoptimizedHelper(masm, Deoptimizer::EAGER);
 }
@@ -898,6 +904,11 @@ void Builtins::Generate_InterpreterNotifyLazyDeoptimized(MacroAssembler* masm) {
 }
 
 
+void Builtins::Generate_InterpreterEnterExceptionHandler(MacroAssembler* masm) {
+  Generate_EnterBytecodeDispatch(masm);
+}
+
+
 void Builtins::Generate_CompileLazy(MacroAssembler* masm) {
   CallRuntimePassFunction(masm, Runtime::kCompileLazy);
   GenerateTailCallToReturnedCode(masm);