PPC: [Interpreter] Fix incorrect frame walking in arguments create stubs

src/ppc/code-stubs-ppc.cc

 // Copyright 2014 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_PPC
 
 #include "src/code-stubs.h"
 #include "src/api-arguments.h"
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
@@ skipping 4760 matching lines @@
 
 void FastNewRestParameterStub::Generate(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- r4 : function
   //  -- cp : context
   //  -- fp : frame pointer
   //  -- lr : return address
   // -----------------------------------
   __ AssertFunction(r4);
 
-  // For Ignition we need to skip all possible handler/stub frames until
-  // we reach the JavaScript frame for the function (similar to what the
-  // runtime fallback implementation does). So make r5 point to that
-  // JavaScript frame.
-  {
-    Label loop, loop_entry;
-    __ mr(r5, fp);
-    __ b(&loop_entry);
-    __ bind(&loop);
+  // Make r5 point to the JavaScript frame.
+  __ mr(r5, fp);
+  if (skip_stub_frame()) {
+    // For Ignition we need to skip the handler/stub frame to reach the
+    // JavaScript frame for the function.
     __ LoadP(r5, MemOperand(r5, StandardFrameConstants::kCallerFPOffset));
-    __ bind(&loop_entry);
+  }
+  if (FLAG_debug_code) {
+    Label ok;
     __ LoadP(ip, MemOperand(r5, StandardFrameConstants::kFunctionOffset));
     __ cmp(ip, r4);
-    __ bne(&loop);
+    __ beq(&ok);
+    __ Abort(kInvalidFrameForFastNewRestArgumentsStub);
+    __ bind(&ok);
   }
 
   // Check if we have rest parameters (only possible if we have an
   // arguments adaptor frame below the function frame).
   Label no_rest_parameters;
   __ LoadP(r5, MemOperand(r5, StandardFrameConstants::kCallerFPOffset));
   __ LoadP(ip, MemOperand(r5, CommonFrameConstants::kContextOrFrameTypeOffset));
   __ CmpSmiLiteral(ip, Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR), r0);
   __ bne(&no_rest_parameters);
 
@@ skipping 110 matching lines @@
 
 void FastNewSloppyArgumentsStub::Generate(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- r4 : function
   //  -- cp : context
   //  -- fp : frame pointer
   //  -- lr : return address
   // -----------------------------------
   __ AssertFunction(r4);
 
-  // For Ignition we need to skip all possible handler/stub frames until
-  // we reach the JavaScript frame for the function (similar to what the
-  // runtime fallback implementation does). So make r10 point to that
-  // JavaScript frame.
-  {
-    Label loop, loop_entry;
-    __ mr(r10, fp);
-    __ b(&loop_entry);
-    __ bind(&loop);
+  // Make r10 point to the JavaScript frame.
+  __ mr(r10, fp);
+  if (skip_stub_frame()) {
+    // For Ignition we need to skip the handler/stub frame to reach the
+    // JavaScript frame for the function.
     __ LoadP(r10, MemOperand(r10, StandardFrameConstants::kCallerFPOffset));
-    __ bind(&loop_entry);
+  }
+  if (FLAG_debug_code) {
+    Label ok;
     __ LoadP(ip, MemOperand(r10, StandardFrameConstants::kFunctionOffset));
     __ cmp(ip, r4);
-    __ bne(&loop);
+    __ beq(&ok);
+    __ Abort(kInvalidFrameForFastNewRestArgumentsStub);
+    __ bind(&ok);
   }
 
 
   // TODO(bmeurer): Cleanup to match the FastNewStrictArgumentsStub.
   __ LoadP(r5, FieldMemOperand(r4, JSFunction::kSharedFunctionInfoOffset));
   __ LoadWordArith(
       r5, FieldMemOperand(r5, SharedFunctionInfo::kFormalParameterCountOffset));
 #if V8_TARGET_ARCH_PPC64
   __ SmiTag(r5);
 #endif
@@ skipping 236 matching lines @@
 
 void FastNewStrictArgumentsStub::Generate(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- r4 : function
   //  -- cp : context
   //  -- fp : frame pointer
   //  -- lr : return address
   // -----------------------------------
   __ AssertFunction(r4);
 
-  // For Ignition we need to skip all possible handler/stub frames until
-  // we reach the JavaScript frame for the function (similar to what the
-  // runtime fallback implementation does). So make r5 point to that
-  // JavaScript frame.
-  {
-    Label loop, loop_entry;
-    __ mr(r5, fp);
-    __ b(&loop_entry);
-    __ bind(&loop);
+  // Make r5 point to the JavaScript frame.
+  __ mr(r5, fp);
+  if (skip_stub_frame()) {
+    // For Ignition we need to skip the handler/stub frame to reach the
+    // JavaScript frame for the function.
     __ LoadP(r5, MemOperand(r5, StandardFrameConstants::kCallerFPOffset));
-    __ bind(&loop_entry);
+  }
+  if (FLAG_debug_code) {
+    Label ok;
     __ LoadP(ip, MemOperand(r5, StandardFrameConstants::kFunctionOffset));
     __ cmp(ip, r4);
-    __ bne(&loop);
+    __ b(&ok);
+    __ Abort(kInvalidFrameForFastNewRestArgumentsStub);
+    __ bind(&ok);
   }
 
   // Check if we have an arguments adaptor frame below the function frame.
   Label arguments_adaptor, arguments_done;
   __ LoadP(r6, MemOperand(r5, StandardFrameConstants::kCallerFPOffset));
   __ LoadP(ip, MemOperand(r6, CommonFrameConstants::kContextOrFrameTypeOffset));
   __ CmpSmiLiteral(ip, Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR), r0);
   __ beq(&arguments_adaptor);
   {
     __ LoadP(r4, FieldMemOperand(r4, JSFunction::kSharedFunctionInfoOffset));
@@ skipping 584 matching lines @@
       fp, (PropertyCallbackArguments::kReturnValueOffset + 3) * kPointerSize);
   CallApiFunctionAndReturn(masm, api_function_address, thunk_ref,
                            kStackUnwindSpace, NULL, return_value_operand, NULL);
 }
 
 #undef __
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_PPC