[turbofan] Implement throwing exceptions into TurboFan code.

src/x64/code-stubs-x64.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_X64
 
 #include "src/bootstrapper.h"
 #include "src/code-stubs.h"
@@ skipping 4764 matching lines @@
 // stack_space * kPointerSize (GCed).
 static void CallApiFunctionAndReturn(MacroAssembler* masm,
                                      Register function_address,
                                      ExternalReference thunk_ref,
                                      Register thunk_last_arg, int stack_space,
                                      Operand* stack_space_operand,
                                      Operand return_value_operand,
                                      Operand* context_restore_operand) {
   Label prologue;
   Label promote_scheduled_exception;
-  Label exception_handled;
   Label delete_allocated_handles;
   Label leave_exit_frame;
   Label write_back;
 
   Isolate* isolate = masm->isolate();
   Factory* factory = isolate->factory();
   ExternalReference next_address =
       ExternalReference::handle_scope_next_address(isolate);
   const int kNextOffset = 0;
   const int kLimitOffset = Offset(
@@ skipping 56 matching lines @@
   // Load the value from ReturnValue
   __ movp(rax, return_value_operand);
   __ bind(&prologue);
 
   // No more valid handles (the result handle was the last one). Restore
   // previous handle scope.
   __ subl(Operand(base_reg, kLevelOffset), Immediate(1));
   __ movp(Operand(base_reg, kNextOffset), prev_next_address_reg);
   __ cmpp(prev_limit_reg, Operand(base_reg, kLimitOffset));
   __ j(not_equal, &delete_allocated_handles);
+
+  // Leave the API exit frame.
   __ bind(&leave_exit_frame);
+  bool restore_context = context_restore_operand != NULL;
+  if (restore_context) {
+    __ movp(rsi, *context_restore_operand);
+  }
+  if (stack_space_operand != nullptr) {
+    __ movp(rbx, *stack_space_operand);
+  }
+  __ LeaveApiExitFrame(!restore_context);
 
   // Check if the function scheduled an exception.
-  __ Move(rsi, scheduled_exception_address);
-  __ Cmp(Operand(rsi, 0), factory->the_hole_value());
+  __ Move(rdi, scheduled_exception_address);
+  __ Cmp(Operand(rdi, 0), factory->the_hole_value());
   __ j(not_equal, &promote_scheduled_exception);
-  __ bind(&exception_handled);
 
 #if DEBUG
   // Check if the function returned a valid JavaScript value.
   Label ok;
   Register return_value = rax;
   Register map = rcx;
 
   __ JumpIfSmi(return_value, &ok, Label::kNear);
   __ movp(map, FieldOperand(return_value, HeapObject::kMapOffset));
 
@@ skipping 16 matching lines @@
   __ j(equal, &ok, Label::kNear);
 
   __ CompareRoot(return_value, Heap::kNullValueRootIndex);
   __ j(equal, &ok, Label::kNear);
 
   __ Abort(kAPICallReturnedInvalidObject);
 
   __ bind(&ok);
 #endif
 
-  bool restore_context = context_restore_operand != NULL;
-  if (restore_context) {
-    __ movp(rsi, *context_restore_operand);
-  }
-  if (stack_space_operand != nullptr) {
-    __ movp(rbx, *stack_space_operand);
-  }
-  __ LeaveApiExitFrame(!restore_context);
   if (stack_space_operand != nullptr) {
     DCHECK_EQ(stack_space, 0);
     __ PopReturnAddressTo(rcx);
     __ addq(rsp, rbx);
     __ jmp(rcx);
   } else {
     __ ret(stack_space * kPointerSize);
   }
 
+  // Re-throw by promoting a scheduled exception.
   __ bind(&promote_scheduled_exception);
-  {
-    FrameScope frame(masm, StackFrame::INTERNAL);
-    __ CallRuntime(Runtime::kPromoteScheduledException, 0);
-  }
-  __ jmp(&exception_handled);
+  __ TailCallRuntime(Runtime::kPromoteScheduledException, 0, 1);
 
   // HandleScope limit has changed. Delete allocated extensions.
   __ bind(&delete_allocated_handles);
   __ movp(Operand(base_reg, kLimitOffset), prev_limit_reg);
   __ movp(prev_limit_reg, rax);
   __ LoadAddress(arg_reg_1, ExternalReference::isolate_address(isolate));
   __ LoadAddress(rax,
                  ExternalReference::delete_handle_scope_extensions(isolate));
   __ call(rax);
   __ movp(rax, prev_limit_reg);
@@ skipping 210 matching lines @@
   CallApiFunctionAndReturn(masm, api_function_address, thunk_ref, getter_arg,
                            kStackSpace, nullptr, return_value_operand, NULL);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64