X87: [turbofan] Implement throwing exceptions into TurboFan code.

src/x87/code-stubs-x87.cc

 // Copyright 2012 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_X87
 
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
@@ skipping 4528 matching lines @@
     __ CallCFunction(ExternalReference::log_leave_external_function(isolate),
                      1);
     __ PopSafepointRegisters();
   }
 
   Label prologue;
   // Load the value from ReturnValue
   __ mov(eax, return_value_operand);
 
   Label promote_scheduled_exception;
-  Label exception_handled;
   Label delete_allocated_handles;
   Label leave_exit_frame;
 
   __ bind(&prologue);
   // No more valid handles (the result handle was the last one). Restore
   // previous handle scope.
   __ mov(Operand::StaticVariable(next_address), ebx);
   __ sub(Operand::StaticVariable(level_address), Immediate(1));
   __ Assert(above_equal, kInvalidHandleScopeLevel);
   __ cmp(edi, Operand::StaticVariable(limit_address));
   __ 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) {
+    __ mov(esi, *context_restore_operand);
+  }
+  if (stack_space_operand != nullptr) {
+    __ mov(ebx, *stack_space_operand);
+  }
+  __ LeaveApiExitFrame(!restore_context);
 
   // Check if the function scheduled an exception.
   ExternalReference scheduled_exception_address =
       ExternalReference::scheduled_exception_address(isolate);
   __ cmp(Operand::StaticVariable(scheduled_exception_address),
          Immediate(isolate->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 = eax;
   Register map = ecx;
 
   __ JumpIfSmi(return_value, &ok, Label::kNear);
   __ mov(map, FieldOperand(return_value, HeapObject::kMapOffset));
 
@@ skipping 16 matching lines @@
   __ j(equal, &ok, Label::kNear);
 
   __ cmp(return_value, isolate->factory()->null_value());
   __ j(equal, &ok, Label::kNear);
 
   __ Abort(kAPICallReturnedInvalidObject);
 
   __ bind(&ok);
 #endif
 
-  bool restore_context = context_restore_operand != NULL;
-  if (restore_context) {
-    __ mov(esi, *context_restore_operand);
-  }
-  if (stack_space_operand != nullptr) {
-    __ mov(ebx, *stack_space_operand);
-  }
-  __ LeaveApiExitFrame(!restore_context);
   if (stack_space_operand != nullptr) {
     DCHECK_EQ(0, stack_space);
     __ pop(ecx);
     __ add(esp, ebx);
     __ jmp(ecx);
   } 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.
   ExternalReference delete_extensions =
       ExternalReference::delete_handle_scope_extensions(isolate);
   __ bind(&delete_allocated_handles);
   __ mov(Operand::StaticVariable(limit_address), edi);
   __ mov(edi, eax);
   __ mov(Operand(esp, 0),
          Immediate(ExternalReference::isolate_address(isolate)));
   __ mov(eax, Immediate(delete_extensions));
@@ skipping 201 matching lines @@
                            ApiParameterOperand(2), kStackSpace, nullptr,
                            Operand(ebp, 7 * kPointerSize), NULL);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X87