X87: [interpreter] First implementation of stack unwinding.

  port 0b3066b8 (r33414)

  original commit message:
  This implements a first prototype of stack unwinding for interpreted
  frames. The unwinding machinery performs a range-based lookup in the
  given handler table and potentially continues dispatching at the handler
  offset. Note that this does not yet correctly restore the context to the
  correct value when the handler is being entered.

BUG=

Review URL: https://codereview.chromium.org/1616613002

Cr-Commit-Position: refs/heads/master@{#33425}

src/x87/builtins-x87.cc

@@ -759,22 +759,7 @@ 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.
-  }
-
+static void Generate_EnterBytecodeDispatch(MacroAssembler* masm) {
   // Initialize register file register.
   __ mov(kInterpreterRegisterFileRegister, ebp);
   __ add(kInterpreterRegisterFileRegister,
@@ -802,12 +787,13 @@ static void Generate_InterpreterNotifyDeoptimizedHelper(
               InterpreterFrameConstants::kBytecodeOffsetFromRegisterPointer));
   __ SmiUntag(kInterpreterBytecodeOffsetRegister);
 
-  // Push dispatch table as a stack located parameter to the bytecode handler -
-  // overwrite the state slot (we don't use these for interpreter deopts).
+  // Push dispatch table as a stack located parameter to the bytecode handler.
   __ LoadRoot(ebx, Heap::kInterpreterTableRootIndex);
   __ add(ebx, Immediate(FixedArray::kHeaderSize - kHeapObjectTag));
   DCHECK_EQ(-1, kInterpreterDispatchTableSpillSlot);
-  __ mov(Operand(esp, kPointerSize), ebx);
+  __ Pop(esi);
+  __ Push(ebx);
+  __ Push(esi);
 
   // Dispatch to the target bytecode.
   __ movzx_b(esi, Operand(kInterpreterBytecodeArrayRegister,
@@ -828,6 +814,34 @@ 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(ebx);
+  __ Drop(1);
+  __ Push(ebx);
+
+  // Enter the bytecode dispatch.
+  Generate_EnterBytecodeDispatch(masm);
+}
+
+
 void Builtins::Generate_InterpreterNotifyDeoptimized(MacroAssembler* masm) {
   Generate_InterpreterNotifyDeoptimizedHelper(masm, Deoptimizer::EAGER);
 }
@@ -843,6 +857,11 @@ 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);