| /* |
| * 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 STATUS_FAILED 2 |
| #define PASSED 0 |
| |
| static jvmtiEnv *jvmti = NULL; |
| static jvmtiCapabilities caps; |
| static jvmtiEventCallbacks callbacks; |
| static jint result = PASSED; |
| static jboolean printdump = JNI_FALSE; |
| |
| const char* CLASS_NAME = "nsk/jvmti/unit/events/redefineCFLH/JvmtiTestr"; |
| |
| void JNICALL |
| VMInit(jvmtiEnv *jvmti_env, JNIEnv *env, jthread thread) { |
| if (printdump == JNI_TRUE) { |
| printf("VMInit event received\n"); |
| } |
| } |
| |
| void JNICALL |
| ClassFileLoadHook(jvmtiEnv *jvmti_env, JNIEnv *env, |
| jclass redefined_class, |
| jobject loader, const char* name, |
| jobject protection_domain, |
| jint class_data_len, |
| const unsigned char* class_data, |
| jint* new_class_data_len, |
| unsigned char** new_class_data) { |
| |
| jvmtiError err; |
| int len = sizeof(jint); |
| char *sig; |
| char *gen; |
| |
| if (name != NULL && (strcmp(name, CLASS_NAME) == 0)) { |
| if (printdump == JNI_TRUE) { |
| printf("Received class file load hook event for class %s\n", name); |
| } |
| |
| if (redefined_class != NULL) { |
| err = (*jvmti)->GetClassSignature(jvmti, redefined_class, &sig, &gen); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("(GetClassSignature) unexpected error: %s (%d)\n", |
| TranslateError(err), err); |
| result = STATUS_FAILED; |
| } else if (printdump == JNI_TRUE) { |
| printf("redefined class name signature is %s\n", sig); |
| } |
| } |
| |
| err = (*jvmti)->Allocate(jvmti, class_data_len, new_class_data); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("(Allocate) unexpected error: %s (%d)\n", |
| TranslateError(err), err); |
| result = STATUS_FAILED; |
| } else { |
| *new_class_data_len = class_data_len; |
| memcpy(*new_class_data, class_data, class_data_len); |
| } |
| } |
| } |
| |
| #ifdef STATIC_BUILD |
| JNIEXPORT jint JNICALL Agent_OnLoad_JvmtiTest(JavaVM *jvm, char *options, void *reserved) { |
| return Agent_Initialize(jvm, options, reserved); |
| } |
| JNIEXPORT jint JNICALL Agent_OnAttach_JvmtiTest(JavaVM *jvm, char *options, void *reserved) { |
| return Agent_Initialize(jvm, options, reserved); |
| } |
| JNIEXPORT jint JNI_OnLoad_JvmtiTest(JavaVM *jvm, char *options, void *reserved) { |
| return JNI_VERSION_1_8; |
| } |
| #endif |
| jint Agent_Initialize(JavaVM *vm, char *options, void *reserved) { |
| jint res; |
| jvmtiError err; |
| |
| if (options != NULL && strcmp(options, "printdump") == 0) { |
| printdump = JNI_TRUE; |
| } |
| |
| if ((res = JNI_ENV_PTR(vm)->GetEnv(JNI_ENV_ARG(vm, (void **) &jvmti), |
| JVMTI_VERSION_1_1)) != JNI_OK) { |
| printf("%s: Failed to call GetEnv: error=%d\n", __FILE__, res); |
| 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_redefine_classes) { |
| printf("Warning: RedefineClasses is not implemented\n"); |
| } |
| |
| callbacks.VMInit = &VMInit; |
| callbacks.ClassFileLoadHook = &ClassFileLoadHook; |
| 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; |
| } |
| |
| if ((err = ((*jvmti)->SetEventNotificationMode(jvmti, JVMTI_ENABLE, |
| JVMTI_EVENT_VM_INIT, NULL))) != JVMTI_ERROR_NONE) { |
| printf("Failed to enable event JVMTI_EVENT_VM_INIT: %s (%d)\n", |
| TranslateError(err), err); |
| return JNI_ERR; |
| } |
| |
| if ((err = ((*jvmti)->SetEventNotificationMode(jvmti, JVMTI_ENABLE, |
| JVMTI_EVENT_CLASS_FILE_LOAD_HOOK, NULL))) != JVMTI_ERROR_NONE) { |
| printf("Failed to enable event JVMTI_EVENT_CLASS_FILE_LOAD_HOOK: %s (%d)\n", |
| TranslateError(err), err); |
| return JNI_ERR; |
| } |
| |
| return JNI_OK; |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_nsk_jvmti_unit_events_redefineCFLH_JvmtiTest_makeRedefinition(JNIEnv *env, |
| jclass cls, jint fl, jclass redefCls, jbyteArray classBytes) { |
| jvmtiClassDefinition classDef; |
| jvmtiError err; |
| |
| if (jvmti == NULL) { |
| printf("JVMTI client was not properly loaded!\n"); |
| return STATUS_FAILED; |
| } |
| |
| if (!caps.can_redefine_classes) { |
| return PASSED; |
| } |
| |
| /* filling the structure jvmtiClassDefinition */ |
| classDef.klass = redefCls; |
| classDef.class_byte_count = |
| JNI_ENV_PTR(env)->GetArrayLength(JNI_ENV_ARG(env, classBytes)); |
| classDef.class_bytes = (unsigned char *) |
| JNI_ENV_PTR(env)->GetByteArrayElements(JNI_ENV_ARG(env, classBytes), |
| NULL); |
| |
| if (fl == 2) { |
| printf(">>>>>>>> Invoke RedefineClasses():\n"); |
| printf("\tnew class byte count=%d\n", classDef.class_byte_count); |
| } |
| err = (*jvmti)->RedefineClasses(jvmti, 1, &classDef); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("%s: Failed to call RedefineClasses():\n", __FILE__); |
| printf("\tthe function returned error %d: %s\n", |
| err, TranslateError(err)); |
| printf("\tFor more info about this error see the JVMTI spec.\n"); |
| return STATUS_FAILED; |
| } |
| if (fl == 2) |
| printf("<<<<<<<< RedefineClasses() is successfully done\n"); |
| |
| return PASSED; |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_nsk_jvmti_unit_events_redefineCFLH_JvmtiTest_GetResult(JNIEnv *env, jclass cls) { |
| return result; |
| } |
| |
| #ifdef __cplusplus |
| } |
| #endif |
