PPC: [interpreter] First implementation of stack unwinding.

src/ppc/builtins-ppc.cc

Index: src/ppc/builtins-ppc.cc
diff --git a/src/ppc/builtins-ppc.cc b/src/ppc/builtins-ppc.cc
index ee5d298edab399eb3b6f16637ce5fc0d3c13d84f..3a433f11a17685484188537a15906fdfad153362 100644
--- a/src/ppc/builtins-ppc.cc
+++ b/src/ppc/builtins-ppc.cc
@@ -1048,23 +1048,7 @@ void Builtins::Generate_InterpreterPushArgsAndConstruct(MacroAssembler* masm) {
 }
 
 
-static void Generate_InterpreterNotifyDeoptimizedHelper(
-    MacroAssembler* masm, Deoptimizer::BailoutType type) {
-  // Enter an internal frame.
-  {
-    FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL);
-    // Save accumulator register and pass the deoptimization type to
-    // the runtime system.
-    __ LoadSmiLiteral(r4, Smi::FromInt(static_cast<int>(type)));
-    __ Push(kInterpreterAccumulatorRegister, r4);
-    __ CallRuntime(Runtime::kNotifyDeoptimized);
-    __ pop(kInterpreterAccumulatorRegister);  // Restore accumulator register.
-    // Tear down internal frame.
-  }
-
-  // Drop state (we don't use these for interpreter deopts).
-  __ Drop(1);
-
+static void Generate_EnterBytecodeDispatch(MacroAssembler* masm) {
   // Initialize register file register and dispatch table register.
   __ addi(kInterpreterRegisterFileRegister, fp,
           Operand(InterpreterFrameConstants::kRegisterFilePointerFromFp));
@@ -1114,6 +1098,28 @@ static void Generate_InterpreterNotifyDeoptimizedHelper(
 }
 
 
+static void Generate_InterpreterNotifyDeoptimizedHelper(
+    MacroAssembler* masm, Deoptimizer::BailoutType type) {
+  // Enter an internal frame.
+  {
+    FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL);
+    // Save accumulator register and pass the deoptimization type to
+    // the runtime system.
+    __ LoadSmiLiteral(r4, Smi::FromInt(static_cast<int>(type)));
+    __ Push(kInterpreterAccumulatorRegister, r4);
+    __ CallRuntime(Runtime::kNotifyDeoptimized);
+    __ pop(kInterpreterAccumulatorRegister);  // Restore accumulator register.
+    // Tear down internal frame.
+  }
+
+  // Drop state (we don't use these for interpreter deopts).
+  __ Drop(1);
+
+  // Enter the bytecode dispatch.
+  Generate_EnterBytecodeDispatch(masm);
+}
+
+
 void Builtins::Generate_InterpreterNotifyDeoptimized(MacroAssembler* masm) {
   Generate_InterpreterNotifyDeoptimizedHelper(masm, Deoptimizer::EAGER);
 }
@@ -1129,6 +1135,11 @@ 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);