[Strings] Fuzz and interpret all relevant StringNew methods (#6526)

This adds fuzzing for string.new_wtf16_array and string.from_code_point. The
latter was also missing interpreter support, which this adds.

1 files changed, 3 insertions, 0 deletions

diff --git a/src/tools/fuzzing.h b/src/tools/fuzzing.h
index 76c0e13c8..5b3c0037b 100644
--- a/src/tools/fuzzing.h
+++ b/src/tools/fuzzing.h
@@ -315,6 +315,8 @@ private:
   Expression* makeBasicRef(Type type);
   Expression* makeCompoundRef(Type type);
 
+  Expression* makeString();
+
   // Similar to makeBasic/CompoundRef, but indicates that this value will be
   // used in a place that will trap on null. For example, the reference of a
   // struct.get or array.set would use this.
@@ -378,6 +380,7 @@ private:
   Type getLoggableType();
   bool isLoggableType(Type type);
   Nullability getNullability();
+  Mutability getMutability();
   Nullability getSubType(Nullability nullability);
   HeapType getSubType(HeapType type);
   Type getSubType(Type type);