Add asserts and state tracking to ensure that we do not call

src/ia32/builtins-ia32.cc

Index: src/ia32/builtins-ia32.cc
===================================================================
--- src/ia32/builtins-ia32.cc	(revision 8110)
+++ src/ia32/builtins-ia32.cc	(working copy)
@@ -114,7 +114,8 @@
   ASSERT(!is_api_function || !count_constructions);
 
   // Enter a construct frame.
-  __ EnterConstructFrame();
+{
+  FrameScope scope(masm, StackFrame::CONSTRUCT);
 
   // Store a smi-tagged arguments count on the stack.
   __ SmiTag(eax);
@@ -123,8 +124,8 @@
   // Push the function to invoke on the stack.
   __ push(edi);
 
-  // Try to allocate the object without transitioning into C code. If any of the
-  // preconditions is not met, the code bails out to the runtime call.
+  // Try to allocate the object without transitioning into C code. If any of
+  // the preconditions is not met, the code bails out to the runtime call.
   Label rt_call, allocated;
   if (FLAG_inline_new) {
     Label undo_allocation;
@@ -147,9 +148,9 @@
     __ CmpObjectType(eax, MAP_TYPE, ebx);
     __ j(not_equal, &rt_call);
 
-    // Check that the constructor is not constructing a JSFunction (see comments
-    // in Runtime_NewObject in runtime.cc). In which case the initial map's
-    // instance type would be JS_FUNCTION_TYPE.
+    // Check that the constructor is not constructing a JSFunction (see
+    // comments in Runtime_NewObject in runtime.cc). In which case the initial
+    // map's instance type would be JS_FUNCTION_TYPE.
     // edi: constructor
     // eax: initial map
     __ CmpInstanceType(eax, JS_FUNCTION_TYPE);
@@ -159,7 +160,8 @@
       Label allocate;
       // Decrease generous allocation count.
       __ mov(ecx, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset));
-      __ dec_b(FieldOperand(ecx, SharedFunctionInfo::kConstructionCountOffset));
+      __ dec_b(FieldOperand(ecx,
+                            SharedFunctionInfo::kConstructionCountOffset));
       __ j(not_zero, &allocate);
 
       __ push(eax);
@@ -180,7 +182,12 @@
     // eax: initial map
     __ movzx_b(edi, FieldOperand(eax, Map::kInstanceSizeOffset));
     __ shl(edi, kPointerSizeLog2);
-    __ AllocateInNewSpace(edi, ebx, edi, no_reg, &rt_call, NO_ALLOCATION_FLAGS);
+    __ AllocateInNewSpace(edi,
+                          ebx,
+                          edi,
+                          no_reg,
+                          &rt_call,
+                          NO_ALLOCATION_FLAGS);
     // Allocated the JSObject, now initialize the fields.
     // eax: initial map
     // ebx: JSObject
@@ -211,10 +218,10 @@
       __ j(less, &loop);
     }
 
-    // Add the object tag to make the JSObject real, so that we can continue and
-    // jump into the continuation code at any time from now on. Any failures
-    // need to undo the allocation, so that the heap is in a consistent state
-    // and verifiable.
+    // Add the object tag to make the JSObject real, so that we can continue
+    // and jump into the continuation code at any time from now on. Any
+    // failures need to undo the allocation, so that the heap is in a
+    // consistent state and verifiable.
     // eax: initial map
     // ebx: JSObject
     // edi: start of next object
@@ -227,7 +234,8 @@
     // edi: start of next object
     // Calculate the total number of properties described by the map.
     __ movzx_b(edx, FieldOperand(eax, Map::kUnusedPropertyFieldsOffset));
-    __ movzx_b(ecx, FieldOperand(eax, Map::kPreAllocatedPropertyFieldsOffset));
+    __ movzx_b(ecx,
+               FieldOperand(eax, Map::kPreAllocatedPropertyFieldsOffset));
     __ add(edx, Operand(ecx));
     // Calculate unused properties past the end of the in-object properties.
     __ movzx_b(ecx, FieldOperand(eax, Map::kInObjectPropertiesOffset));
@@ -373,8 +381,10 @@
   // Restore the arguments count and leave the construct frame.
   __ bind(&exit);
   __ mov(ebx, Operand(esp, kPointerSize));  // get arguments count
-  __ LeaveConstructFrame();
 
+  // Leave construct frame.
+}
+
   // Remove caller arguments from the stack and return.
   ASSERT(kSmiTagSize == 1 && kSmiTag == 0);
   __ pop(ecx);
@@ -402,11 +412,11 @@
 
 static void Generate_JSEntryTrampolineHelper(MacroAssembler* masm,
                                              bool is_construct) {
-  // Clear the context before we push it when entering the JS frame.
+  // Clear the context before we push it when entering the internal frame.
   __ Set(esi, Immediate(0));
 
-  // Enter an internal frame.
-  __ EnterInternalFrame();
+{
+  FrameScope scope(masm, StackFrame::INTERNAL);
 
   // Load the previous frame pointer (ebx) to access C arguments
   __ mov(ebx, Operand(ebp, 0));
@@ -436,7 +446,8 @@
   __ j(not_equal, &loop);
 
   // Get the function from the stack and call it.
-  __ mov(edi, Operand(esp, eax, times_4, +1 * kPointerSize));  // +1 ~ receiver
+  // kPointerSize for the receiver.
+  __ mov(edi, Operand(esp, eax, times_4, kPointerSize));
 
   // Invoke the code.
   if (is_construct) {
@@ -448,12 +459,12 @@
                       NullCallWrapper(), CALL_AS_METHOD);
   }
 
-  // Exit the JS frame. Notice that this also removes the empty
+  // Exit the internal frame. Notice that this also removes the empty.
   // context and the function left on the stack by the code
   // invocation.
-  __ LeaveInternalFrame();
-  __ ret(1 * kPointerSize);  // remove receiver
 }
+  __ ret(kPointerSize);  // Remove receiver.
+}
 
 
 void Builtins::Generate_JSEntryTrampoline(MacroAssembler* masm) {
@@ -467,8 +478,8 @@
 
 
 void Builtins::Generate_LazyCompile(MacroAssembler* masm) {
-  // Enter an internal frame.
-  __ EnterInternalFrame();
+{
+  FrameScope scope(masm, StackFrame::INTERNAL);
 
   // Push a copy of the function.
   __ push(edi);
@@ -483,8 +494,8 @@
   // Restore receiver.
   __ pop(edi);
 
-  // Tear down temporary frame.
-  __ LeaveInternalFrame();
+  // Tear down internal frame.
+}
 
   // Do a tail-call of the compiled function.
   __ lea(eax, FieldOperand(eax, Code::kHeaderSize));
@@ -493,8 +504,8 @@
 
 
 void Builtins::Generate_LazyRecompile(MacroAssembler* masm) {
-  // Enter an internal frame.
-  __ EnterInternalFrame();
+{
+  FrameScope scope(masm, StackFrame::INTERNAL);
 
   // Push a copy of the function onto the stack.
   __ push(edi);
@@ -509,8 +520,8 @@
   // Restore receiver.
   __ pop(edi);
 
-  // Tear down temporary frame.
-  __ LeaveInternalFrame();
+  // Tear down internal frame.
+}
 
   // Do a tail-call of the compiled function.
   __ lea(eax, FieldOperand(eax, Code::kHeaderSize));
@@ -520,15 +531,15 @@
 
 static void Generate_NotifyDeoptimizedHelper(MacroAssembler* masm,
                                              Deoptimizer::BailoutType type) {
-  // Enter an internal frame.
-  __ EnterInternalFrame();
+{
+  FrameScope scope(masm, StackFrame::INTERNAL);
 
   // Pass the function and deoptimization type to the runtime system.
   __ push(Immediate(Smi::FromInt(static_cast<int>(type))));
   __ CallRuntime(Runtime::kNotifyDeoptimized, 1);
 
-  // Tear down temporary frame.
-  __ LeaveInternalFrame();
+  // Tear down internal frame.
+}
 
   // Get the full codegen state from the stack and untag it.
   __ mov(ecx, Operand(esp, 1 * kPointerSize));
@@ -569,9 +580,10 @@
   // the registers without worrying about which of them contain
   // pointers. This seems a bit fragile.
   __ pushad();
-  __ EnterInternalFrame();
-  __ CallRuntime(Runtime::kNotifyOSR, 0);
-  __ LeaveInternalFrame();
+  {
+    FrameScope scope(masm, StackFrame::INTERNAL);
+    __ CallRuntime(Runtime::kNotifyOSR, 0);
+  }
   __ popad();
   __ ret(0);
 }
@@ -636,7 +648,9 @@
     __ j(above_equal, &shift_arguments);
 
     __ bind(&convert_to_object);
-    __ EnterInternalFrame();  // In order to preserve argument count.
+
+  { // In order to preserve argument count.
+    FrameScope scope(masm, StackFrame::INTERNAL);
     __ SmiTag(eax);
     __ push(eax);
 
@@ -646,7 +660,8 @@
 
     __ pop(eax);
     __ SmiUntag(eax);
-    __ LeaveInternalFrame();
+  }
+
     // Restore the function to edi.
     __ mov(edi, Operand(esp, eax, times_4, 1 * kPointerSize));
     __ jmp(&patch_receiver);
@@ -723,7 +738,8 @@
 
 
 void Builtins::Generate_FunctionApply(MacroAssembler* masm) {
-  __ EnterInternalFrame();
+{
+  FrameScope scope(masm, StackFrame::INTERNAL);
 
   __ push(Operand(ebp, 4 * kPointerSize));  // push this
   __ push(Operand(ebp, 2 * kPointerSize));  // push arguments
@@ -851,7 +867,8 @@
   __ InvokeFunction(edi, actual, CALL_FUNCTION,
                     NullCallWrapper(), CALL_AS_METHOD);
 
-  __ LeaveInternalFrame();
+  // Leave the internal frame.
+}
   __ ret(3 * kPointerSize);  // remove this, receiver, and arguments
 }
 
@@ -1403,12 +1420,13 @@
   // Invoke the conversion builtin and put the result into ebx.
   __ bind(&convert_argument);
   __ IncrementCounter(counters->string_ctor_conversions(), 1);
-  __ EnterInternalFrame();
+{
+  FrameScope scope(masm, StackFrame::INTERNAL);
   __ push(edi);  // Preserve the function.
   __ push(eax);
   __ InvokeBuiltin(Builtins::TO_STRING, CALL_FUNCTION);
   __ pop(edi);
-  __ LeaveInternalFrame();
+}
   __ mov(ebx, eax);
   __ jmp(&argument_is_string);
 
@@ -1425,10 +1443,11 @@
   // create a string wrapper.
   __ bind(&gc_required);
   __ IncrementCounter(counters->string_ctor_gc_required(), 1);
-  __ EnterInternalFrame();
+{
+  FrameScope scope(masm, StackFrame::INTERNAL);
   __ push(ebx);
   __ CallRuntime(Runtime::kNewStringWrapper, 1);
-  __ LeaveInternalFrame();
+}
   __ ret(0);
 }
 
@@ -1553,7 +1572,7 @@
 
 void Builtins::Generate_OnStackReplacement(MacroAssembler* masm) {
   CpuFeatures::TryForceFeatureScope scope(SSE2);
-  if (!CpuFeatures::IsSupported(SSE2)) {
+  if (!CpuFeatures::IsSupported(SSE2) && FLAG_debug_code) {
     __ Abort("Unreachable code: Cannot optimize without SSE2 support.");
     return;
   }
@@ -1580,10 +1599,11 @@
 
   // Pass the function to optimize as the argument to the on-stack
   // replacement runtime function.
-  __ EnterInternalFrame();
+{
+  FrameScope scope(masm, StackFrame::INTERNAL);
   __ push(eax);
   __ CallRuntime(Runtime::kCompileForOnStackReplacement, 1);
-  __ LeaveInternalFrame();
+}
 
   // If the result was -1 it means that we couldn't optimize the
   // function. Just return and continue in the unoptimized version.
@@ -1602,7 +1622,9 @@
   __ j(above_equal, &ok, Label::kNear);
   StackCheckStub stub;
   __ TailCallStub(&stub);
-  __ Abort("Unreachable code: returned from tail call.");
+  if (FLAG_debug_code) {
+    __ Abort("Unreachable code: returned from tail call.");
+  }
   __ bind(&ok);
   __ ret(0);