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
  #define MILLIS_PER_MINUTE (60 * 1000)
  
  static jvmtiEnv *jvmti = NULL;
  static jvmtiCapabilities caps;
  static jint result = PASSED;
  static jboolean printdump = JNI_FALSE;
  static jrawMonitorID monitor;
  static jrawMonitorID wait_lock;
  static jlong wait_time;
  
  #ifdef STATIC_BUILD
  JNIEXPORT jint JNICALL Agent_OnLoad_rawmnwait005(JavaVM *jvm, char *options, void *reserved) {
      return Agent_Initialize(jvm, options, reserved);
  }
  JNIEXPORT jint JNICALL Agent_OnAttach_rawmnwait005(JavaVM *jvm, char *options, void *reserved) {
      return Agent_Initialize(jvm, options, reserved);
  }
  JNIEXPORT jint JNI_OnLoad_rawmnwait005(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;
  
      if (options != NULL && strcmp(options, "printdump") == 0) {
          printdump = JNI_TRUE;
      }
  
      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;
      }
  
      err = (*jvmti)->GetPotentialCapabilities(jvmti, &caps);
      if (err != JVMTI_ERROR_NONE) {
          printf("(GetPotentialCapabilities) unexpected error: %s (%d)\n",
                 TranslateError(err), err);
          return JNI_ERR;
      }
  
      err = (*jvmti)->AddCapabilities(jvmti, &caps);
      if (err != JVMTI_ERROR_NONE) {
          printf("(AddCapabilities) unexpected error: %s (%d)\n",
                 TranslateError(err), err);
          return JNI_ERR;
      }
  
      err = (*jvmti)->GetCapabilities(jvmti, &caps);
      if (err != JVMTI_ERROR_NONE) {
          printf("(GetCapabilities) unexpected error: %s (%d)\n",
                 TranslateError(err), err);
          return JNI_ERR;
      }
  
      if (!caps.can_signal_thread) {
          printf("Warning: InterruptThread is not implemented\n");
      }
  
      return JNI_OK;
  }
  
  static void JNICALL
  test_thread(jvmtiEnv* jvmti, JNIEnv* jni, void *unused) {
      jvmtiError err;
      const char* const thread_name = "test thread";
  
      err = (*jvmti)->RawMonitorEnter(jvmti, monitor);
      if (err != JVMTI_ERROR_NONE) {
          printf("(RawMonitorEnter#test) unexpected error: %s (%d)\n",
                 TranslateError(err), err);
          result = STATUS_FAILED;
      }
      if (printdump == JNI_TRUE) {
          printf(">>> [%s] acquired lock for 'monitor' ...\n", thread_name);
      }
  
      err = (*jvmti)->RawMonitorEnter(jvmti, wait_lock);
      if (err != JVMTI_ERROR_NONE) {
          printf("(RawMonitorEnter#wait) unexpected error: %s (%d)\n",
                 TranslateError(err), err);
          result = STATUS_FAILED;
          return;
      }
  
      if (printdump == JNI_TRUE) {
          printf(">>> [%s] acquired lock for 'wait_lock' ...\n", thread_name);
          printf(">>> [%s] notifying main thread (wait_lock.notify) ...\n", thread_name);
      }
  
      err = (*jvmti)->RawMonitorNotify(jvmti, wait_lock);
      if (err != JVMTI_ERROR_NONE) {
          printf("(RawMonitorWait#wait) unexpected error: %s (%d)\n",
                 TranslateError(err), err);
          result = STATUS_FAILED;
          return;
      }
      err = (*jvmti)->RawMonitorExit(jvmti, wait_lock);
      if (err != JVMTI_ERROR_NONE) {
          printf("(RawMonitorExit#wait) unexpected error: %s (%d)\n",
                 TranslateError(err), err);
          result = STATUS_FAILED;
          return;
      }
  
      if (printdump == JNI_TRUE) {
          printf(">>> [%s] waiting for interrupt ...\n", thread_name);
      }
  
      err = (*jvmti)->RawMonitorWait(jvmti, monitor, wait_time);
      if (err != JVMTI_ERROR_INTERRUPT) {
          printf("Error expected: JVMTI_ERROR_INTERRUPT,\n");
          printf("\tactual: %s (%d)\n", TranslateError(err), err);
          result = STATUS_FAILED;
      }
  
      err = (*jvmti)->RawMonitorExit(jvmti, monitor);
      if (err != JVMTI_ERROR_NONE) {
          printf("(RawMonitorExit#test) unexpected error: %s (%d)\n",
                 TranslateError(err), err);
          result = STATUS_FAILED;
      }
  
      if (printdump == JNI_TRUE) {
          printf(">>> [%s] all done\n", thread_name);
      }
  }
  
  JNIEXPORT jint JNICALL
  Java_nsk_jvmti_RawMonitorWait_rawmnwait005_check(JNIEnv *env,
          jclass cls, jthread thr, jint wtime) {
      jvmtiError err;
      const char* const thread_name = "main thread";
  
      if (!caps.can_signal_thread) {
          return result;
      }
  
      wait_time = wtime * MILLIS_PER_MINUTE;
  
      if (jvmti == NULL) {
          printf("JVMTI client was not properly loaded!\n");
          return STATUS_FAILED;
      }
  
      err = (*jvmti)->CreateRawMonitor(jvmti, "test monitor", &monitor);
      if (err != JVMTI_ERROR_NONE) {
          printf("(CreateRawMonitor#test) unexpected error: %s (%d)\n",
                 TranslateError(err), err);
          return STATUS_FAILED;
      }
  
      // 'wait_lock' is used to notify current thread when child thread ('test_thread')
      //  is ready. This in particular means 'test_thread' is waiting for notification
      //  of the raw monitor 'monitor' and current thread can now interrupt 'test_thread'.
      //
      err = (*jvmti)->CreateRawMonitor(jvmti, "wait lock", &wait_lock);
      if (err != JVMTI_ERROR_NONE) {
          printf("(CreateRawMonitor#wait) unexpected error: %s (%d)\n",
                 TranslateError(err), err);
          return STATUS_FAILED;
      }
  
      // get exclusive ownership of 'wait_lock' monitor before
      //  starting 'test_thread' to avoid following race condition:
      //   'test_thread'     |   current thread
      //   -------------------------------------
      //                     | RunAgentThread(..., test_thread, ...)
      //    wait_lock.enter  |
      //    wait_lock.notify |
      //                     | wait_lock.enter
      //                     | wait_lock.wait(0)
      //    ...              |
      //                     |  ... will wait forever ...
      //
      // See also 6399368 test bug.
      //
      err = (*jvmti)->RawMonitorEnter(jvmti, wait_lock);
      if (err != JVMTI_ERROR_NONE) {
          printf("(RawMonitorEnter#wait) unexpected error: %s (%d)\n",
                 TranslateError(err), err);
          return STATUS_FAILED;
      }
      if (printdump == JNI_TRUE) {
          printf(">>> [%s] acquired lock for 'wait_lock' ... \n", thread_name);
      }
  
      if (printdump == JNI_TRUE) {
          printf(">>> [%s] starting test thread ...\n", thread_name);
      }
      err = (*jvmti)->RunAgentThread(jvmti, thr, test_thread, NULL,
                                  JVMTI_THREAD_NORM_PRIORITY);
      if (err != JVMTI_ERROR_NONE) {
          printf("(RunDebugThread) unexpected error: %s (%d)\n",
                 TranslateError(err), err);
          return STATUS_FAILED;
      }
  
      if (printdump == JNI_TRUE) {
          printf(">>> [%s] waiting for test thread to run (do wait_lock.wait)...\n", thread_name);
      }
      err = (*jvmti)->RawMonitorWait(jvmti, wait_lock, (jlong)0);
      if (err != JVMTI_ERROR_NONE) {
          printf("(RawMonitorWait#wait) unexpected error: %s (%d)\n",
                 TranslateError(err), err);
          return STATUS_FAILED;
      }
      if (printdump == JNI_TRUE) {
          printf(">>> [%s] got notification from test thread ...\n", thread_name);
      }
  
      err = (*jvmti)->RawMonitorExit(jvmti, wait_lock);
      if (err != JVMTI_ERROR_NONE) {
          printf("(RawMonitorExit#wait) unexpected error: %s (%d)\n",
                 TranslateError(err), err);
          return STATUS_FAILED;
      }
  
      err = (*jvmti)->RawMonitorEnter(jvmti, monitor);
      if (err != JVMTI_ERROR_NONE) {
          printf("(RawMonitorEnter#test) unexpected error: %s (%d)\n",
                 TranslateError(err), err);
          return STATUS_FAILED;
      }
      if (printdump == JNI_TRUE) {
          printf(">>> [%s] acquired lock for 'monitor' ... \n", thread_name);
      }
  
      if (printdump == JNI_TRUE) {
          printf(">>> [%s] interrupting test thread ...\n", thread_name);
      }
  
      err = (*jvmti)->InterruptThread(jvmti, thr);
      if (err != JVMTI_ERROR_NONE) {
          printf("(InterruptThread) unexpected error: %s (%d)\n",
                 TranslateError(err), err);
          result = STATUS_FAILED;
      }
  
      err = (*jvmti)->RawMonitorExit(jvmti, monitor);
      if (err != JVMTI_ERROR_NONE) {
          printf("(RawMonitorExit#test) unexpected error: %s (%d)\n",
                 TranslateError(err), err);
          result = STATUS_FAILED;
      }
  
      if (printdump == JNI_TRUE) {
          printf(">>> [%s] all done\n", thread_name);
      }
  
      return result;
  }
  
  #ifdef __cplusplus
  }
  #endif
  