[interpreter] Add explicit OSR polling bytecode.

src/builtins/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 1705 matching lines @@
   __ Jump(r4);
 
   // Compatible receiver check failed: throw an Illegal Invocation exception.
   __ bind(&receiver_check_failed);
   // Drop the arguments (including the receiver)
   __ add(r0, r0, Operand(1));
   __ add(sp, sp, Operand(r0, LSL, kPointerSizeLog2));
   __ TailCallRuntime(Runtime::kThrowIllegalInvocation);
 }
 
-void Builtins::Generate_OnStackReplacement(MacroAssembler* masm) {
+static void Generate_OnStackReplacementHelper(MacroAssembler* masm,
+                                              bool has_handler_frame) {
   // Lookup the function in the JavaScript frame.
-  __ ldr(r0, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset));
+  if (has_handler_frame) {
+    __ ldr(r0, MemOperand(fp, StandardFrameConstants::kCallerFPOffset));
+    __ ldr(r0, MemOperand(r0, JavaScriptFrameConstants::kFunctionOffset));
+  } else {
+    __ ldr(r0, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset));
+  }
+
   {
     FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL);
     // Pass function as argument.
     __ push(r0);
     __ CallRuntime(Runtime::kCompileForOnStackReplacement);
   }
 
-  // If the code object is null, just return to the unoptimized code.
+  // If the code object is null, just return to the caller.
   Label skip;
   __ cmp(r0, Operand(Smi::FromInt(0)));
   __ b(ne, &skip);
   __ Ret();
 
   __ bind(&skip);
 
+  // Drop any potential handler frame that is be sitting on top of the actual
+  // JavaScript frame. This is the case then OSR is triggered from bytecode.
+  if (has_handler_frame) {
+    __ LeaveFrame(StackFrame::STUB);
+  }
+
   // Load deoptimization data from the code object.
   // <deopt_data> = <code>[#deoptimization_data_offset]
   __ ldr(r1, FieldMemOperand(r0, Code::kDeoptimizationDataOffset));
 
   {
     ConstantPoolUnavailableScope constant_pool_unavailable(masm);
     __ add(r0, r0, Operand(Code::kHeaderSize - kHeapObjectTag));  // Code start
 
     if (FLAG_enable_embedded_constant_pool) {
       __ LoadConstantPoolPointerRegisterFromCodeTargetAddress(r0);
     }
 
     // Load the OSR entrypoint offset from the deoptimization data.
     // <osr_offset> = <deopt_data>[#header_size + #osr_pc_offset]
     __ ldr(r1, FieldMemOperand(
                    r1, FixedArray::OffsetOfElementAt(
                            DeoptimizationInputData::kOsrPcOffsetIndex)));
 
     // Compute the target address = code start + osr_offset
     __ add(lr, r0, Operand::SmiUntag(r1));
 
     // And "return" to the OSR entry point of the function.
     __ Ret();
   }
 }
 
+void Builtins::Generate_OnStackReplacement(MacroAssembler* masm) {
+  Generate_OnStackReplacementHelper(masm, false);
+}
+
+void Builtins::Generate_InterpreterOnStackReplacement(MacroAssembler* masm) {
+  Generate_OnStackReplacementHelper(masm, true);
+}
+
 // static
 void Builtins::Generate_DatePrototype_GetField(MacroAssembler* masm,
                                                int field_index) {
   // ----------- S t a t e -------------
   //  -- r0    : number of arguments
   //  -- r1    : function
   //  -- cp    : context
   //  -- lr    : return address
   //  -- sp[0] : receiver
   // -----------------------------------
@@ skipping 1118 matching lines @@
     __ bkpt(0);
   }
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM