third_party/android_crazy_linker/src/tests/jni_lib.cpp

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 // A simple library that provides JNI_OnLoad() and JNI_OnUnload() hooks.
   6 // Used by test_java_vm.cpp
   7
   8 #include <jni.h>
   9 #include <stdio.h>
  10 #include <stdlib.h>
  11
  12 #define VARNAME "TEST_VAR"
  13
  14 extern "C" int JNI_OnLoad(JavaVM* vm, void* reserved) {
  15   printf("%s: Entering\n", __FUNCTION__);
  16   const char* env = getenv(VARNAME);
  17   if (!env || strcmp(env, "INIT")) {
  18     fprintf(stderr,
  19             "%s: Env variable %s has invalid value: %s (expected INIT)\n",
  20             __FUNCTION__,
  21             VARNAME,
  22             env);
  23     exit(1);
  24   }
  25   setenv(VARNAME, "LOADED", 1);
  26   printf("%s: Exiting\n", __FUNCTION__);
  27   return JNI_VERSION_1_4;
  28 }
  29
  30 extern "C" void JNI_OnUnload(JavaVM* vm, void* reserved) {
  31   printf("%s: Entering\n", __FUNCTION__);
  32   const char* env = getenv(VARNAME);
  33   if (!env || strcmp(env, "LOADED")) {
  34     fprintf(stderr,
  35             "%s: Env variable %s has invalid value: %s (expected LOADED)\n",
  36             __FUNCTION__,
  37             VARNAME,
  38             env);
  39     exit(1);
  40   }
  41   setenv(VARNAME, "UNLOADED", 1);
  42   printf("%s: Exiting\n", __FUNCTION__);
  43 }