From 845523f1a7bd755f271bdd0b7270534f0e51f0d6 Mon Sep 17 00:00:00 2001
From: Alexey Andreev <konsoletyper@gmail.com>
Date: Thu, 12 Sep 2024 20:43:09 +0200
Subject: [PATCH] wasm gc: implement flags for classes

---
 .../gc/classes/WasmGCClassGenerator.java      | 25 +++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/core/src/main/java/org/teavm/backend/wasm/generate/gc/classes/WasmGCClassGenerator.java b/core/src/main/java/org/teavm/backend/wasm/generate/gc/classes/WasmGCClassGenerator.java
index a1aefe176..5b52259d1 100644
--- a/core/src/main/java/org/teavm/backend/wasm/generate/gc/classes/WasmGCClassGenerator.java
+++ b/core/src/main/java/org/teavm/backend/wasm/generate/gc/classes/WasmGCClassGenerator.java
@@ -88,6 +88,7 @@ import org.teavm.model.analysis.ClassInitializerInfo;
 import org.teavm.model.analysis.ClassMetadataRequirements;
 import org.teavm.model.classes.TagRegistry;
 import org.teavm.model.util.ReflectionUtil;
+import org.teavm.runtime.RuntimeClass;
 
 public class WasmGCClassGenerator implements WasmGCClassInfoProvider, WasmGCInitializerContributor {
     private static final MethodDescriptor CLINIT_METHOD_DESC = new MethodDescriptor("<clinit>", ValueType.VOID);
@@ -504,6 +505,7 @@ public class WasmGCClassGenerator implements WasmGCClassInfoProvider, WasmGCInit
                 target.add(setClassField(classInfo, classNameOffset, new WasmGetGlobal(namePtr)));
             }
             if (cls != null) {
+                target.add(setClassField(classInfo, classFlagsOffset, new WasmInt32Constant(getFlags(cls))));
                 if (metadataReq.simpleName() && cls.getSimpleName() != null) {
                     var namePtr = strings.getStringConstant(cls.getSimpleName()).global;
                     target.add(setClassField(classInfo, classSimpleNameOffset, new WasmGetGlobal(namePtr)));
@@ -547,6 +549,29 @@ public class WasmGCClassGenerator implements WasmGCClassInfoProvider, WasmGCInit
         };
     }
 
+    private int getFlags(ClassReader cls) {
+        var flags = 0;
+        if (cls.hasModifier(ElementModifier.ABSTRACT)) {
+            flags |= WasmGCClassFlags.ABSTRACT;
+        }
+        if (cls.hasModifier(ElementModifier.INTERFACE)) {
+            flags |= WasmGCClassFlags.INTERFACE;
+        }
+        if (cls.hasModifier(ElementModifier.FINAL)) {
+            flags |= WasmGCClassFlags.FINAL;
+        }
+        if (cls.hasModifier(ElementModifier.ANNOTATION)) {
+            flags |= WasmGCClassFlags.ANNOTATION;
+        }
+        if (cls.hasModifier(ElementModifier.SYNTHETIC)) {
+            flags |= WasmGCClassFlags.SYNTHETIC;
+        }
+        if (cls.hasModifier(ElementModifier.ENUM)) {
+            flags |= WasmGCClassFlags.ENUM;
+        }
+        return flags;
+    }
+
     private WasmFunction generateCloneFunction(WasmGCClassInfo classInfo, String className) {
         var function = new WasmFunction(functionTypes.of(standardClasses.objectClass().getType(),
                 standardClasses.objectClass().getType()));