[interpreter] First implementation of stack unwinding.

src/arm/builtins-arm.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.
 
 #if V8_TARGET_ARCH_ARM
 
 #include "src/codegen.h"
 #include "src/debug/debug.h"
 #include "src/deoptimizer.h"
 #include "src/full-codegen/full-codegen.h"
@@ skipping 1041 matching lines @@
   __ push(ip);
 
   // Push the arguments.
   Generate_InterpreterPushArgs(masm, r2, r4, r5);
 
   // Call the constructor with r0, r1, and r3 unmodified.
   __ Jump(masm->isolate()->builtins()->Construct(), RelocInfo::CODE_TARGET);
 }
 
 
-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(r1, Operand(Smi::FromInt(static_cast<int>(type))));
-    __ push(r1);
-    __ 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(r1, MemOperand(kInterpreterBytecodeArrayRegister,
                          kInterpreterBytecodeOffsetRegister));
   __ ldr(ip, MemOperand(kInterpreterDispatchTableRegister, r1, LSL,
                         kPointerSizeLog2));
   __ add(ip, ip, Operand(Code::kHeaderSize - kHeapObjectTag));
   __ mov(pc, ip);
 }
 
 
+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(r1, Operand(Smi::FromInt(static_cast<int>(type))));
+    __ push(r1);
+    __ 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 1297 matching lines @@
   }
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM