Fork of the Android NDK crazy linker.

third_party/android_crazy_linker/src/tests/jni_lib.cpp

+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// A simple library that provides JNI_OnLoad() and JNI_OnUnload() hooks.
+// Used by test_java_vm.cpp
+
+#include <jni.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#define VARNAME "TEST_VAR"
+
+extern "C" int JNI_OnLoad(JavaVM* vm, void* reserved) {
+  printf("%s: Entering\n", __FUNCTION__);
+  const char* env = getenv(VARNAME);
+  if (!env || strcmp(env, "INIT")) {
+    fprintf(stderr,
+            "%s: Env variable %s has invalid value: %s (expected INIT)\n",
+            __FUNCTION__,
+            VARNAME,
+            env);
+    exit(1);
+  }
+  setenv(VARNAME, "LOADED", 1);
+  printf("%s: Exiting\n", __FUNCTION__);
+  return JNI_VERSION_1_4;
+}
+
+extern "C" void JNI_OnUnload(JavaVM* vm, void* reserved) {
+  printf("%s: Entering\n", __FUNCTION__);
+  const char* env = getenv(VARNAME);
+  if (!env || strcmp(env, "LOADED")) {
+    fprintf(stderr,
+            "%s: Env variable %s has invalid value: %s (expected LOADED)\n",
+            __FUNCTION__,
+            VARNAME,
+            env);
+    exit(1);
+  }
+  setenv(VARNAME, "UNLOADED", 1);
+  printf("%s: Exiting\n", __FUNCTION__);
+}