| /* |
| * Copyright (c) 2007, 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 <jni.h> |
| #include <jvmti.h> |
| #include "agent_common.h" |
| #include <string.h> |
| #include <stdarg.h> |
| #include "jvmti_tools.h" |
| #include "JVMTITools.h" |
| |
| /* |
| hs202t002: |
| */ |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| #define FILE_NAME "nsk/jvmti/scenarios/hotswap/HS202/hs202t002/MyThread" |
| #define CLASS_NAME "Lnsk/jvmti/scenarios/hotswap/HS202/hs202t002/MyThread;" |
| |
| #define PATH_FORMAT "%s%02d/%s" |
| #define DIR_NAME "newclass" |
| #define METHOD_NAME "display" |
| |
| static jint redefineNumber = 0; |
| static jvmtiEnv * jvmti = NULL; |
| |
| typedef enum { |
| suspend_error = -1, |
| not_suspended, |
| suspended |
| } thread_suspend_status_t; |
| |
| static volatile thread_suspend_status_t thread_suspend_status = not_suspended; |
| |
| void JNICALL callbackMethodExit(jvmtiEnv *jvmti_env, |
| JNIEnv* jni_env, |
| jthread thread, |
| jmethodID method, |
| jboolean was_popped_by_exception, |
| jvalue return_value) { |
| if ( was_popped_by_exception ) { |
| char * name; |
| char * signature; |
| char * generic ; |
| jvmtiError err; |
| err= JVMTI_ERROR_NONE; |
| (*jvmti_env)->GetMethodName(jvmti_env, method, &name, &signature, &generic); |
| if (strcmp(name,METHOD_NAME) == 0) { |
| jclass cls; |
| char fileName[512]; |
| nsk_jvmti_getFileName(redefineNumber, FILE_NAME, fileName, |
| sizeof(fileName)/sizeof(char)); |
| (*jvmti_env)->GetMethodDeclaringClass(jvmti_env,method, &cls); |
| if ( nsk_jvmti_redefineClass(jvmti_env, cls,fileName) == NSK_TRUE ) { |
| nsk_printf(" Agent:: redefine class success ..\n"); |
| nsk_printf("Agent::SUSPENDING>> \n"); |
| err=(*jvmti_env)->SuspendThread(jvmti_env,thread); |
| if (err == JVMTI_ERROR_NONE) { |
| thread_suspend_status = suspended; |
| nsk_printf("Agent:: Thread successfully suspended..\n"); |
| } else if (err == JVMTI_ERROR_THREAD_SUSPENDED) { |
| thread_suspend_status = suspend_error; |
| nsk_printf(" ## Error occured %s \n",TranslateError(err)); |
| } |
| } |
| } |
| } |
| } |
| |
| #ifdef STATIC_BUILD |
| JNIEXPORT jint JNICALL Agent_OnLoad_hs202t002(JavaVM *jvm, char *options, void *reserved) { |
| return Agent_Initialize(jvm, options, reserved); |
| } |
| JNIEXPORT jint JNICALL Agent_OnAttach_hs202t002(JavaVM *jvm, char *options, void *reserved) { |
| return Agent_Initialize(jvm, options, reserved); |
| } |
| JNIEXPORT jint JNI_OnLoad_hs202t002(JavaVM *jvm, char *options, void *reserved) { |
| return JNI_VERSION_1_8; |
| } |
| #endif |
| jint Agent_Initialize(JavaVM *vm, char *options, void *reserved) { |
| jint rc ; |
| nsk_printf("Agent:: VM.. Started..\n"); |
| redefineNumber=0; |
| rc=(*vm)->GetEnv(vm, (void **)&jvmti, JVMTI_VERSION_1_1); |
| if ( rc!= JNI_OK ) { |
| nsk_printf("Agent:: Could not load JVMTI interface \n"); |
| return JNI_ERR; |
| } else { |
| jvmtiCapabilities caps; |
| jvmtiEventCallbacks eventCallbacks; |
| memset(&caps, 0, sizeof(caps)); |
| if (nsk_jvmti_parseOptions(options) == NSK_FALSE ) { |
| nsk_printf("# error agent Failed to parse options \n"); |
| return JNI_ERR; |
| } |
| caps.can_redefine_classes = 1; |
| caps.can_suspend = 1; |
| caps.can_pop_frame = 1; |
| caps.can_generate_method_exit_events = 1; |
| (*jvmti)->AddCapabilities(jvmti, &caps); |
| memset(&eventCallbacks, 0, sizeof(eventCallbacks)); |
| eventCallbacks.MethodExit = callbackMethodExit; |
| rc=(*jvmti)->SetEventCallbacks(jvmti,&eventCallbacks, sizeof(eventCallbacks)); |
| if (rc != JVMTI_ERROR_NONE) { |
| nsk_printf(" Agent:: Error occured while setting event callbacks \n"); |
| return JNI_ERR; |
| } |
| if (NSK_TRUE == nsk_jvmti_enableNotification(jvmti,JVMTI_EVENT_METHOD_EXIT, NULL)) { |
| nsk_printf(" Agent :: NOTIFICATIONS ARE ENABLED \n"); |
| } else { |
| nsk_printf(" Agent :: Error Enabling Notifications.."); |
| } |
| } |
| return JNI_OK; |
| } |
| |
| JNIEXPORT jboolean JNICALL |
| Java_nsk_jvmti_scenarios_hotswap_HS202_hs202t002_hs202t002_popThreadFrame(JNIEnv * jni, |
| jclass clas, |
| jthread thread) { |
| jvmtiError err = JVMTI_ERROR_NONE; |
| jboolean retvalue = JNI_FALSE; |
| jint state; |
| nsk_printf("Agent:: POPPING THE FRAME..\n"); |
| (*jvmti)->GetThreadState(jvmti, thread, &state); |
| if ( state & JVMTI_THREAD_STATE_SUSPENDED) { |
| err = (*jvmti)->PopFrame(jvmti,thread); |
| if (err == JVMTI_ERROR_NONE) { |
| nsk_printf("Agent:: PopFrame succeeded..\n"); |
| return JNI_TRUE; |
| } else { |
| nsk_printf(" ## Error occured %s \n",TranslateError(err)); |
| } |
| } else { |
| nsk_printf("Agent:: Thread was not suspened.. check for capabilities, and java method signature "); |
| } |
| return retvalue; |
| } |
| |
| JNIEXPORT jboolean JNICALL |
| Java_nsk_jvmti_scenarios_hotswap_HS202_hs202t002_hs202t002_resumeThread(JNIEnv * jni, |
| jclass clas, |
| jthread thread) { |
| jvmtiError err = JVMTI_ERROR_NONE; |
| jboolean retvalue = JNI_FALSE; |
| |
| // disable notifications before resuming thread |
| // to avoid recursion on PopFrame issued reinvoke |
| if (NSK_TRUE == nsk_jvmti_disableNotification(jvmti,JVMTI_EVENT_METHOD_EXIT, NULL)) { |
| nsk_printf("Agent :: nsk_jvmti_disabled notifications..\n"); |
| } else { |
| nsk_printf("Agent :: Failed to disable notifications.."); |
| return JNI_FALSE; |
| } |
| |
| err = (*jvmti)->ResumeThread(jvmti,thread); |
| if (err == JVMTI_ERROR_NONE) { |
| thread_suspend_status = not_suspended; |
| retvalue = JNI_TRUE; |
| nsk_printf(" Agent:: Thread Resumed.. \n"); |
| } else { |
| nsk_printf(" Agent:: Failed.. to Resume the thread.\n"); |
| retvalue = JNI_FALSE; |
| } |
| return retvalue; |
| } |
| |
| JNIEXPORT jboolean JNICALL |
| Java_nsk_jvmti_scenarios_hotswap_HS202_hs202t002_hs202t002_isThreadSuspended(JNIEnv* jni, |
| jclass clas, |
| jthread thread) { |
| if (suspend_error == thread_suspend_status) { |
| jclass ex_class = (*jni)->FindClass(jni, "java/lang/IllegalThreadStateException"); |
| (*jni)->ThrowNew(jni, ex_class, "Thread has failed to self suspend"); |
| return JNI_FALSE; |
| } |
| |
| return suspended == thread_suspend_status; |
| } |
| |
| #ifdef __cplusplus |
| } |
| #endif |
