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
  
  typedef struct {
      char *cls;
      char *name;
      char *sig;
  } frame_info;
  
  static jvmtiEnv *jvmti = NULL;
  static jvmtiCapabilities caps;
  static jvmtiEventCallbacks callbacks;
  static jint result = PASSED;
  static jboolean printdump = JNI_FALSE;
  static jmethodID mid;
  static frame_info frames[] = {
      {"Lnsk/jvmti/GetStackTrace/getstacktr004$TestThread;", "checkPoint", "()V"},
      {"Lnsk/jvmti/GetStackTrace/getstacktr004$TestThread;", "chain4", "()V"},
      {"Lnsk/jvmti/GetStackTrace/getstacktr004$TestThread;", "chain3", "()V"},
      {"Lnsk/jvmti/GetStackTrace/getstacktr004$TestThread;", "chain2", "()V"},
      {"Lnsk/jvmti/GetStackTrace/getstacktr004$TestThread;", "chain1", "()V"},
      {"Lnsk/jvmti/GetStackTrace/getstacktr004$TestThread;", "run", "()V"},
  };
  
  #define NUMBER_OF_FRAMES ((int) (sizeof(frames)/sizeof(frame_info)))
  
  void check(jvmtiEnv *jvmti_env, jthread thr) {
      jvmtiError err;
      jvmtiFrameInfo f[NUMBER_OF_FRAMES + 1];
      jclass callerClass;
      char *sigClass, *name, *sig, *generic;
      jint i, count;
  
      err = (*jvmti_env)->GetStackTrace(jvmti_env, thr,
          0, NUMBER_OF_FRAMES + 1, f, &count);
      if (err != JVMTI_ERROR_NONE) {
          printf("(GetStackTrace) unexpected error: %s (%d)\n",
                 TranslateError(err), err);
          result = STATUS_FAILED;
          return;
      }
      if (count != NUMBER_OF_FRAMES) {
          printf("Wrong frame count, expected: %d, actual: %d\n",
                 NUMBER_OF_FRAMES, count);
          result = STATUS_FAILED;
      }
  
      if (printdump == JNI_TRUE) {
              printf(">>>   frame count: %d\n", count);
      }
      for (i = 0; i < count; i++) {
          if (printdump == JNI_TRUE) {
              printf(">>> checking frame#%d ...\n", i);
          }
          err = (*jvmti_env)->GetMethodDeclaringClass(jvmti_env, f[i].method,
              &callerClass);
          if (err != JVMTI_ERROR_NONE) {
              printf("(GetMethodDeclaringClass#%d) unexpected error: %s (%d)\n",
                     i, TranslateError(err), err);
              result = STATUS_FAILED;
              continue;
          }
          err = (*jvmti_env)->GetClassSignature(jvmti_env, callerClass,
              &sigClass, &generic);
          if (err != JVMTI_ERROR_NONE) {
              printf("(GetClassSignature#%d) unexpected error: %s (%d)\n",
                     i, TranslateError(err), err);
              result = STATUS_FAILED;
              continue;
          }
          err = (*jvmti_env)->GetMethodName(jvmti_env, f[i].method,
              &name, &sig, &generic);
          if (err != JVMTI_ERROR_NONE) {
              printf("(GetMethodName#%d) unexpected error: %s (%d)\n",
                     i, TranslateError(err), err);
              result = STATUS_FAILED;
              continue;
          }
          if (printdump == JNI_TRUE) {
              printf(">>>   class:  \"%s\"\n", sigClass);
              printf(">>>   method: \"%s%s\"\n", name, sig);
          }
          if (i < NUMBER_OF_FRAMES) {
              if (sigClass == NULL || strcmp(sigClass, frames[i].cls) != 0) {
                  printf("(frame#%d) wrong class sig: \"%s\", expected: \"%s\"\n",
                         i, sigClass, frames[i].cls);
                  result = STATUS_FAILED;
              }
              if (name == NULL || strcmp(name, frames[i].name) != 0) {
                  printf("(frame#%d) wrong method name: \"%s\", expected: \"%s\"\n",
                         i, name, frames[i].name);
                  result = STATUS_FAILED;
              }
              if (sig == NULL || strcmp(sig, frames[i].sig) != 0) {
                  printf("(frame#%d) wrong method sig: \"%s\", expected: \"%s\"\n",
                         i, sig, frames[i].sig);
                  result = STATUS_FAILED;
              }
          }
      }
  }
  
  void JNICALL Breakpoint(jvmtiEnv *jvmti_env, JNIEnv *env,
          jthread thr, jmethodID method, jlocation location) {
      if (mid != method) {
          printf("ERROR: didn't know where we got called from");
          result = STATUS_FAILED;
          return;
      }
      check(jvmti_env, thr);
  }
  
  #ifdef STATIC_BUILD
  JNIEXPORT jint JNICALL Agent_OnLoad_getstacktr004(JavaVM *jvm, char *options, void *reserved) {
      return Agent_Initialize(jvm, options, reserved);
  }
  JNIEXPORT jint JNICALL Agent_OnAttach_getstacktr004(JavaVM *jvm, char *options, void *reserved) {
      return Agent_Initialize(jvm, options, reserved);
  }
  JNIEXPORT jint JNI_OnLoad_getstacktr004(JavaVM *jvm, char *options, void *reserved) {
      return JNI_VERSION_1_8;
  }
  #endif
  jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) {
      jvmtiError err;
      jint res;
  
      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_generate_breakpoint_events) {
          callbacks.Breakpoint = &Breakpoint;
          err = (*jvmti)->SetEventCallbacks(jvmti, &callbacks, sizeof(callbacks));
          if (err != JVMTI_ERROR_NONE) {
              printf("(SetEventCallbacks) unexpected error: %s (%d)\n",
                     TranslateError(err), err);
              return JNI_ERR;
          }
      } else {
          printf("Warning: Breakpoint is not implemented\n");
      }
  
      return JNI_OK;
  }
  
  JNIEXPORT void JNICALL
  Java_nsk_jvmti_GetStackTrace_getstacktr004_getReady(JNIEnv *env, jclass cls, jclass clazz) {
      jvmtiError err;
  
      if (jvmti == NULL) {
          printf("JVMTI client was not properly loaded!\n");
          result = STATUS_FAILED;
          return;
      }
  
      if (!caps.can_generate_breakpoint_events) {
          return;
      }
  
      mid = JNI_ENV_PTR(env)->GetMethodID(JNI_ENV_ARG(env, clazz),
           "checkPoint", "()V");
      if (mid == NULL) {
          printf("Cannot find Method ID for method checkPoint\n");
          result = STATUS_FAILED;
          return;
      }
      err = (*jvmti)->SetBreakpoint(jvmti, mid, 0);
      if (err != JVMTI_ERROR_NONE) {
          printf("(SetBreakpoint) unexpected error: %s (%d)\n",
                 TranslateError(err), err);
          result = STATUS_FAILED;
          return;
      }
  
      err = (*jvmti)->SetEventNotificationMode(jvmti, JVMTI_ENABLE,
          JVMTI_EVENT_BREAKPOINT, NULL);
      if (err != JVMTI_ERROR_NONE) {
          printf("Failed to enable BREAKPOINT event: %s (%d)\n",
                 TranslateError(err), err);
          result = STATUS_FAILED;
      }
  }
  
  JNIEXPORT jint JNICALL
  Java_nsk_jvmti_GetStackTrace_getstacktr004_getRes(JNIEnv *env, jclass cls) {
      return result;
  }
  
  #ifdef __cplusplus
  }
  #endif
  