Revert^2 "Add AddToDexClassloader JVMTI extension functions"

This reverts commit 799e536da9733ab638946f56e1ceb62d62cd3c81.

It seems that on some of our test devices the kernel does not have an
implementation for memfd_create. To work around this I added a basic
wrapper that will simulate memfd_create using temp files. This should
be sufficient for testing. All actual devices are expected to support
the memfd_create syscall natively.

Reason for revert: Implemented fallback for memfd_create
Bug: 132699522
Bug: 132914283
Test: ./test.py --host

Change-Id: I63b36464df24193fff27624c1e2350d65545ad1d

1 files changed, 44 insertions, 0 deletions

diff --git a/test/1964-add-to-dex-classloader-file/src-ex/foobar/NewClass.java b/test/1964-add-to-dex-classloader-file/src-ex/foobar/NewClass.java
new file mode 100644
index 0000000000..a27d5d3c58
--- /dev/null
+++ b/test/1964-add-to-dex-classloader-file/src-ex/foobar/NewClass.java
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package foobar;
+import art.Breakpoint;
+import art.StackTrace;
+
+public class NewClass {
+  static void sayHi() throws Exception {
+    System.out.println("Hello from NewClass sayHi function");
+    // Doing this would be nice but it would make compiling the test more tricky. Just use
+    // reflection and check the classloader is the same.
+    // TestClass.sayBye();
+    StackTrace.StackFrameData[] stack = StackTrace.GetStackTrace(Thread.currentThread());
+    StackTrace.StackFrameData caller = null;
+    System.out.println("Nearby stack:");
+    for (StackTrace.StackFrameData sfd : stack) {
+      String caller_name = sfd.method.getDeclaringClass().getName();
+      if (caller_name.startsWith("art.") || caller_name.startsWith("foobar.")) {
+        System.out.println("\t" + sfd.method + "(line: " +
+                           Breakpoint.locationToLine(sfd.method, sfd.current_location) + ")");
+        caller = sfd;
+      } else {
+        break;
+      }
+    }
+    if (NewClass.class.getClassLoader() != caller.method.getDeclaringClass().getClassLoader()) {
+      System.out.println("Different classloader for TestClass and my class.");
+    }
+  }
+}
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