jvmti: Fix Java.choose() on 32-bit systems

A jlong is 64 bits wide.
frida · Dec 13, 2024 · a8a6d77 · a8a6d77
1 parent 653246e
commit a8a6d77
Showing 1 changed file with 5 additions and 4 deletions.
diff --git a/lib/class-factory.js b/lib/class-factory.js
@@ -566,15 +566,16 @@ class ClassFactory {
     const JVMTI_HEAP_OBJECT_EITHER = 3;
 
     const h = classWrapper.$borrowClassHandle(env);
+    const tag = int64(h.value.toString());
     try {
       const heapObjectCallback = new NativeCallback((classTag, size, tagPtr, userData) => {
-        tagPtr.writePointer(h.value);
+        tagPtr.writeS64(tag);
         return JVMTI_ITERATION_CONTINUE;
-      }, 'int', ['long', 'long', 'pointer', 'pointer']);
+      }, 'int', ['int64', 'int64', 'pointer', 'pointer']);
       jvmti.iterateOverInstancesOfClass(h.value, JVMTI_HEAP_OBJECT_EITHER, heapObjectCallback, h.value);
 
-      const tagPtr = Memory.alloc(pointerSize);
-      tagPtr.writePointer(h.value);
+      const tagPtr = Memory.alloc(8);
+      tagPtr.writeS64(tag);
       const countPtr = Memory.alloc(jsizeSize);
       const objectsPtr = Memory.alloc(pointerSize);
       jvmti.getObjectsWithTags(1, tagPtr, countPtr, objectsPtr, NULL);