[interpreter] First implementation of stack unwinding.

src/arm64/builtins-arm64.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.
 
 #if V8_TARGET_ARCH_ARM64
 
 #include "src/arm64/frames-arm64.h"
 #include "src/codegen.h"
 #include "src/debug/debug.h"
 #include "src/deoptimizer.h"
@@ skipping 1000 matching lines @@
   __ LeaveFrame(StackFrame::JAVA_SCRIPT);
 
   // Drop receiver + arguments and return.
   __ Ldr(w1, FieldMemOperand(kInterpreterBytecodeArrayRegister,
                              BytecodeArray::kParameterSizeOffset));
   __ Drop(x1, 1);
   __ Ret();
 }
 
 
-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.
-    __ Mov(x1, Operand(Smi::FromInt(static_cast<int>(type))));
-    __ Push(x1);
-    __ CallRuntime(Runtime::kNotifyDeoptimized);
-
-    __ Pop(kInterpreterAccumulatorRegister);  // Restore accumulator register.
-    // Tear down internal frame.
-  }
-
-  // Drop state (we don't use this for interpreter deopts).
-  __ Drop(1);
-
+static void Generate_EnterBytecodeDispatch(MacroAssembler* masm) {
   // Initialize register file register and dispatch table register.
   __ Add(kInterpreterRegisterFileRegister, fp,
          Operand(InterpreterFrameConstants::kRegisterFilePointerFromFp));
   __ LoadRoot(kInterpreterDispatchTableRegister,
               Heap::kInterpreterTableRootIndex);
   __ Add(kInterpreterDispatchTableRegister, kInterpreterDispatchTableRegister,
          Operand(FixedArray::kHeaderSize - kHeapObjectTag));
 
   // Get the context from the frame.
   // TODO(rmcilroy): Update interpreter frame to expect current context at the
@@ skipping 29 matching lines @@
   // Dispatch to the target bytecode.
   __ Ldrb(x1, MemOperand(kInterpreterBytecodeArrayRegister,
                          kInterpreterBytecodeOffsetRegister));
   __ Mov(x1, Operand(x1, LSL, kPointerSizeLog2));
   __ Ldr(ip0, MemOperand(kInterpreterDispatchTableRegister, x1));
   __ Add(ip0, ip0, Operand(Code::kHeaderSize - kHeapObjectTag));
   __ Jump(ip0);
 }
 
 
+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.
+    __ Mov(x1, Operand(Smi::FromInt(static_cast<int>(type))));
+    __ Push(x1);
+    __ CallRuntime(Runtime::kNotifyDeoptimized);
+
+    __ Pop(kInterpreterAccumulatorRegister);  // Restore accumulator register.
+    // Tear down internal frame.
+  }
+
+  // Drop state (we don't use this for interpreter deopts).
+  __ Drop(1);
+
+  // Enter the bytecode dispatch.
+  Generate_EnterBytecodeDispatch(masm);
+}
+
+
 void Builtins::Generate_InterpreterNotifyDeoptimized(MacroAssembler* masm) {
   Generate_InterpreterNotifyDeoptimizedHelper(masm, Deoptimizer::EAGER);
 }
 
 
 void Builtins::Generate_InterpreterNotifySoftDeoptimized(MacroAssembler* masm) {
   Generate_InterpreterNotifyDeoptimizedHelper(masm, Deoptimizer::SOFT);
 }
 
 
 void Builtins::Generate_InterpreterNotifyLazyDeoptimized(MacroAssembler* masm) {
   Generate_InterpreterNotifyDeoptimizedHelper(masm, Deoptimizer::LAZY);
 }
 
 
+void Builtins::Generate_InterpreterEnterExceptionHandler(MacroAssembler* masm) {
+  Generate_EnterBytecodeDispatch(masm);
+}
+
+
 void Builtins::Generate_CompileLazy(MacroAssembler* masm) {
   CallRuntimePassFunction(masm, Runtime::kCompileLazy);
   GenerateTailCallToReturnedCode(masm);
 }
 
 
 void Builtins::Generate_CompileOptimized(MacroAssembler* masm) {
   CallRuntimePassFunction(masm, Runtime::kCompileOptimized_NotConcurrent);
   GenerateTailCallToReturnedCode(masm);
 }
@@ skipping 1485 matching lines @@
   }
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM