[coverage] Block coverage with support for IfStatements

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index 69598a497abbaf653d35c5580d1529d260f7061b..58a664c198cc928d68f1a459d86d0a3955864143 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -147,6 +147,7 @@ TYPE_CHECKER(CallHandlerInfo, TUPLE2_TYPE)
 TYPE_CHECKER(Cell, CELL_TYPE)
 TYPE_CHECKER(Code, CODE_TYPE)
 TYPE_CHECKER(ConstantElementsPair, TUPLE2_TYPE)
+TYPE_CHECKER(CoverageInfo, FIXED_ARRAY_TYPE)
 TYPE_CHECKER(FixedDoubleArray, FIXED_DOUBLE_ARRAY_TYPE)
 TYPE_CHECKER(Foreign, FOREIGN_TYPE)
 TYPE_CHECKER(FreeSpace, FREE_SPACE_TYPE)
@@ -630,6 +631,7 @@ CAST_ACCESSOR(Cell)
 CAST_ACCESSOR(Code)
 CAST_ACCESSOR(ConsString)
 CAST_ACCESSOR(ConstantElementsPair)
+CAST_ACCESSOR(CoverageInfo)
 CAST_ACCESSOR(DeoptimizationInputData)
 CAST_ACCESSOR(DeoptimizationOutputData)
 CAST_ACCESSOR(DependentCode)
@@ -1434,6 +1436,7 @@ Object** HeapObject::RawField(HeapObject* obj, int byte_offset) {
   return reinterpret_cast<Object**>(FIELD_ADDR(obj, byte_offset));
 }
 
+int Smi::ToInt(Object* o) { return Smi::cast(o)->value(); }
 
 MapWord MapWord::FromMap(const Map* map) {
   return MapWord(reinterpret_cast<uintptr_t>(map));
@@ -5929,6 +5932,7 @@ ACCESSORS(SharedFunctionInfo, instance_class_name, Object,
 ACCESSORS(SharedFunctionInfo, function_data, Object, kFunctionDataOffset)
 ACCESSORS(SharedFunctionInfo, script, Object, kScriptOffset)
 ACCESSORS(SharedFunctionInfo, debug_info, Object, kDebugInfoOffset)
+ACCESSORS(SharedFunctionInfo, coverage_info, Object, kCoverageInfoOffset)
 ACCESSORS(SharedFunctionInfo, function_identifier, Object,
           kFunctionIdentifierOffset)
 
@@ -6245,6 +6249,12 @@ bool SharedFunctionInfo::HasDebugCode() const {
   return HasBytecodeArray();
 }
 
+bool SharedFunctionInfo::HasCoverageInfo() const {
+  if (coverage_info()->IsSmi()) return false;
+  DCHECK(coverage_info()->IsCoverageInfo());
+  return true;
+}
+
 int SharedFunctionInfo::debugger_hints() const {
   if (HasDebugInfo()) return GetDebugInfo()->debugger_hints();
   return Smi::cast(debug_info())->value();