src: handle String__FIELD_offset__int

mmarchini · mmarchini · commit 5a94ecf9c678 · 2020-01-21T14:14:33.000-08:00
Some Node.js v12 versions will have String postmortem metadata as `String__FIELD_offset__int` instead of `String__FIELD_offset__TYPE`. Handle both cases so llnode can work on more versions. PR-URL: #330 Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com> Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
diff --git a/src/llv8-constants.cc b/src/llv8-constants.cc
@@ -323,18 +323,22 @@ void TwoByteString::Load() {
 
 
 void ConsString::Load() {
-  kFirstOffset = LoadConstant("class_ConsString__first__String");
-  kSecondOffset = LoadConstant("class_ConsString__second__String");
+  kFirstOffset = LoadConstant({"class_ConsString__first__String",
+                               "class_ConsString__first_offset__int"});
+  kSecondOffset = LoadConstant({"class_ConsString__second__String",
+                                "class_ConsString__second_offset__int"});
 }
 
 
 void SlicedString::Load() {
   kParentOffset = LoadConstant("class_SlicedString__parent__String");
-  kOffsetOffset = LoadConstant("class_SlicedString__offset__SMI");
+  kOffsetOffset = LoadConstant({"class_SlicedString__offset__SMI",
+                                "class_SlicedString__offset_offset__int"});
 }
 
 void ThinString::Load() {
-  kActualOffset = LoadConstant("class_ThinString__actual__String");
+  kActualOffset = LoadConstant({"class_ThinString__actual__String",
+                                "class_ThinString__actual_offset__int"});
 }
 
 void FixedArrayBase::Load() {
diff --git a/src/llv8-constants.h b/src/llv8-constants.h
@@ -296,8 +296,8 @@ class ConsString : public Module {
  public:
   CONSTANTS_DEFAULT_METHODS(ConsString);
 
-  int64_t kFirstOffset;
-  int64_t kSecondOffset;
+  Constant<int64_t> kFirstOffset;
+  Constant<int64_t> kSecondOffset;
 
  protected:
   void Load();
@@ -308,7 +308,7 @@ class SlicedString : public Module {
   CONSTANTS_DEFAULT_METHODS(SlicedString);
 
   int64_t kParentOffset;
-  int64_t kOffsetOffset;
+  Constant<int64_t> kOffsetOffset;
 
  protected:
   void Load();
@@ -318,7 +318,7 @@ class ThinString : public Module {
  public:
   CONSTANTS_DEFAULT_METHODS(ThinString);
 
-  int64_t kActualOffset;
+  Constant<int64_t> kActualOffset;
 
  protected:
   void Load();
diff --git a/src/llv8-inl.h b/src/llv8-inl.h
@@ -774,13 +774,13 @@ ACCESSOR(JSFunction, Info, js_function()->kSharedInfoOffset,
          SharedFunctionInfo);
 ACCESSOR(JSFunction, GetContext, js_function()->kContextOffset, HeapObject);
 
-ACCESSOR(ConsString, First, cons_string()->kFirstOffset, String);
-ACCESSOR(ConsString, Second, cons_string()->kSecondOffset, String);
+SAFE_ACCESSOR(ConsString, First, cons_string()->kFirstOffset, String);
+SAFE_ACCESSOR(ConsString, Second, cons_string()->kSecondOffset, String);
 
 ACCESSOR(SlicedString, Parent, sliced_string()->kParentOffset, String);
-ACCESSOR(SlicedString, Offset, sliced_string()->kOffsetOffset, Smi);
+SAFE_ACCESSOR(SlicedString, Offset, sliced_string()->kOffsetOffset, Smi);
 
-ACCESSOR(ThinString, Actual, thin_string()->kActualOffset, String);
+SAFE_ACCESSOR(ThinString, Actual, thin_string()->kActualOffset, String);
 
 ACCESSOR(FixedArrayBase, Length, fixed_array_base()->kLengthOffset, Smi);
 
