collect stack data

frida/consumer/StackConsumer.java

@@ -0,0 +1,23 @@
+package theseus.android;
+
+import java.util.function.Consumer;
+import java.lang.StackWalker.StackFrame;
+import java.util.ArrayList;
+
+class StackConsumer implements Consumer<StackFrame> {
+
+    public ArrayList<StackFrame> stack;
+
+    public StackConsumer() {
+        this.stack = new ArrayList();
+    }
+
+    @Override
+    public void accept(StackFrame frame) {
+        stack.add(frame);
+    }
+
+    public StackFrame[] getStack() {
+        return this.stack.toArray(new StackFrame[] {});
+    }
+}