text: /*
   * Copyright (c) 2003, 2018, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.
   *
   * This code is distributed in the hope that it will be useful, but WITHOUT
   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
   * version 2 for more details (a copy is included in the LICENSE file that
   * accompanied this code).
   *
   * You should have received a copy of the GNU General Public License version
   * 2 along with this work; if not, write to the Free Software Foundation,
   * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
   * or visit www.oracle.com if you need additional information or have any
   * questions.
   */
  
  #include <stdio.h>
  #include <string.h>
  #include "jvmti.h"
  #include "agent_common.h"
  #include "JVMTITools.h"
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  #ifndef JNI_ENV_ARG
  
  #ifdef __cplusplus
  #define JNI_ENV_ARG(x, y) y
  #define JNI_ENV_PTR(x) x
  #else
  #define JNI_ENV_ARG(x,y) x, y
  #define JNI_ENV_PTR(x) (*x)
  #endif
  
  #endif
  
  #define PASSED 0
  #define STATUS_FAILED 2
  
  static jvmtiEnv *jvmti;
  static jvmtiCapabilities caps;
  static jint result = PASSED;
  
  #ifdef STATIC_BUILD
  JNIEXPORT jint JNICALL Agent_OnLoad_contmon002(JavaVM *jvm, char *options, void *reserved) {
      return Agent_Initialize(jvm, options, reserved);
  }
  JNIEXPORT jint JNICALL Agent_OnAttach_contmon002(JavaVM *jvm, char *options, void *reserved) {
      return Agent_Initialize(jvm, options, reserved);
  }
  JNIEXPORT jint JNI_OnLoad_contmon002(JavaVM *jvm, char *options, void *reserved) {
      return JNI_VERSION_1_8;
  }
  #endif
  jint  Agent_Initialize(JavaVM *jvm, char *options, void *reserved) {
      jint res;
      jvmtiError err;
  
      res = JNI_ENV_PTR(jvm)->GetEnv(JNI_ENV_ARG(jvm, (void **) &jvmti),
          JVMTI_VERSION_1_1);
      if (res != JNI_OK || jvmti == NULL) {
          printf("Wrong result of a valid call to GetEnv !\n");
          return JNI_ERR;
      }
  
      if ((err = ((*jvmti)->GetCapabilities(jvmti, &caps))) != JVMTI_ERROR_NONE) {
          printf("(GetCapabilities) unexpected error: %s (%d)\n",
                 TranslateError(err), err);
          return JNI_ERR;
      }
  
      if (!caps.can_get_current_contended_monitor) {
          /*
           * GetCurrentContendedMonitor is not currently available, but
           * is it potentially available?
           */
          err = (*jvmti)->GetPotentialCapabilities(jvmti, &caps);
          if (err != JVMTI_ERROR_NONE) {
              printf("(GetPotentialCapabilities) unexpected error: %s (%d)\n",
                     TranslateError(err), err);
              return JNI_ERR;
          }
          if (caps.can_get_current_contended_monitor) {
              /*
               * Yes, GetCurrentContendedMonitor is potentially available.
               * Let's turn it on!
               */
              memset(&caps, 0, sizeof(jvmtiCapabilities));
              caps.can_get_current_contended_monitor = 1;
              err = (*jvmti)->AddCapabilities(jvmti, &caps);
              if (err != JVMTI_ERROR_NONE) {
                  printf("(AddCapabilities) unexpected error: %s (%d)\n",
                         TranslateError(err), err);
                  return JNI_ERR;
              }
          } else {
              printf("Warning: GetCurrentContendedMonitor is not implemented\n");
          }
      }
  
      return JNI_OK;
  }
  
  JNIEXPORT void JNICALL
  Java_nsk_jvmti_GetCurrentContendedMonitor_contmon002_checkMon(JNIEnv *env, jclass cls, jint point, jthread thr) {
      jvmtiError err;
      jobject mon = NULL;
  
      err = (*jvmti)->GetCurrentContendedMonitor(jvmti, thr, &mon);
      if (err == JVMTI_ERROR_MUST_POSSESS_CAPABILITY &&
              !caps.can_get_current_contended_monitor) {
          /* It is OK */
      } else if (err != JVMTI_ERROR_NONE) {
          printf("(GetCurrentContendedMonitor#%d) unexpected error: %s (%d)\n",
                 point, TranslateError(err), err);
          result = STATUS_FAILED;
      } else if (mon != NULL) {
          printf("(#%d) unexpected monitor object: 0x%p\n", point, mon);
          result = STATUS_FAILED;
      }
  }
  
  JNIEXPORT jint JNICALL Java_nsk_jvmti_GetCurrentContendedMonitor_contmon002_getRes(JNIEnv *env, jclass cls) {
      return result;
  }
  
  #ifdef __cplusplus
  }
  #endif
  