| /* |
| * Copyright (c) 2004, 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 <string.h> |
| #include "jvmti.h" |
| #include "agent_common.h" |
| #include "jni_tools.h" |
| #include "jvmti_tools.h" |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| /* scaffold objects */ |
| static jvmtiEnv *jvmti = NULL; |
| static jlong timeout = 0; |
| |
| #define TESTED_CLASS_NAME "nsk/jvmti/scenarios/bcinstr/BI01/bi01t001a" |
| |
| static jint newClassSize; |
| static unsigned char* newClassBytes; |
| static jvmtiClassDefinition oldClassDef; |
| |
| /* ============================================================================= */ |
| /* |
| * Class: nsk_jvmti_scenarios_bcinstr_BI01_bi01t001 |
| * Method: setNewByteCode |
| * Signature: ([B)Z |
| */ |
| JNIEXPORT jboolean JNICALL |
| Java_nsk_jvmti_scenarios_bcinstr_BI01_bi01t001_setNewByteCode(JNIEnv *jni_env, |
| jobject this, jbyteArray byteCode) { |
| |
| jbyte* elements; |
| jboolean isCopy; |
| |
| if (!NSK_JNI_VERIFY(jni_env, (newClassSize = |
| NSK_CPP_STUB2(GetArrayLength, jni_env, byteCode)) > 0)) { |
| nsk_jvmti_setFailStatus(); |
| return NSK_FALSE; |
| } |
| NSK_DISPLAY1("\t... got array size: %d\n", newClassSize); |
| |
| if (!NSK_JNI_VERIFY(jni_env, (elements = |
| NSK_CPP_STUB3(GetByteArrayElements, jni_env, byteCode, |
| &isCopy)) != NULL)) { |
| nsk_jvmti_setFailStatus(); |
| return NSK_FALSE; |
| } |
| NSK_DISPLAY1("\t... got elements list: 0x%p\n", (void*)elements); |
| |
| if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB3(Allocate, jvmti, |
| newClassSize, &newClassBytes))) { |
| nsk_jvmti_setFailStatus(); |
| return NSK_FALSE; |
| } |
| NSK_DISPLAY1("\t... created bytes array: 0x%p\n", (void*)newClassBytes); |
| |
| { |
| int j; |
| for (j = 0; j < newClassSize; j++) |
| newClassBytes[j] = (unsigned char)elements[j]; |
| } |
| NSK_DISPLAY1("\t... copied bytecode: %d bytes\n", (int)newClassSize); |
| |
| NSK_DISPLAY1("\t... release elements list: 0x%p\n", (void*)elements); |
| NSK_TRACE(NSK_CPP_STUB4(ReleaseByteArrayElements, jni_env, byteCode, elements, JNI_ABORT)); |
| NSK_DISPLAY0("\t... released\n"); |
| return NSK_TRUE; |
| } |
| |
| /* ============================================================================= */ |
| /* |
| * Class: nsk_jvmti_scenarios_bcinstr_BI01_bi01t001 |
| * Method: setClass |
| * Signature: (Ljava/lang/Class;)V |
| */ |
| JNIEXPORT void JNICALL |
| Java_nsk_jvmti_scenarios_bcinstr_BI01_bi01t001_setClass(JNIEnv *jni_env, |
| jobject this, jclass cls) { |
| |
| if (!NSK_JNI_VERIFY(jni_env, (oldClassDef.klass = |
| NSK_CPP_STUB2(NewGlobalRef, jni_env, cls)) != NULL)) { |
| nsk_jvmti_setFailStatus(); |
| } |
| } |
| |
| /* ============================================================================= */ |
| |
| /** Callback function for ClassFileLoadHook event. */ |
| JNIEXPORT void JNICALL |
| cbClassFileLoadHook(jvmtiEnv *jvmti_env, JNIEnv* jni_env, |
| jclass class_being_redefined, 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) { |
| |
| if ( name == NULL || strcmp(name, TESTED_CLASS_NAME) ) { |
| return; |
| } |
| |
| NSK_DISPLAY3("CLASS_FILE_LOAD_HOOK event: %s\n\treceived bytecode: 0x%p:%d\n", |
| name, (void *)class_data, class_data_len); |
| if (nsk_getVerboseMode()) { |
| nsk_printHexBytes(" ", 16, class_data_len, class_data); |
| } |
| |
| { |
| /*store original byte code, it will be used to do final redefinition*/ |
| int j; |
| unsigned char *arr; |
| |
| oldClassDef.class_byte_count = class_data_len; |
| if (!NSK_JVMTI_VERIFY( |
| NSK_CPP_STUB3(Allocate, jvmti_env, class_data_len, |
| &arr))) { |
| nsk_jvmti_setFailStatus(); |
| return; |
| } |
| for (j = 0; j < class_data_len; j++) { |
| arr[j] = class_data[j]; |
| } |
| oldClassDef.class_bytes = arr; |
| } |
| |
| *new_class_data_len = newClassSize; |
| *new_class_data = newClassBytes; |
| |
| NSK_DISPLAY2("Replace with new bytecode: 0x%p:%d\n", |
| (void*)newClassBytes, |
| (int)newClassSize); |
| if (nsk_getVerboseMode()) { |
| nsk_printHexBytes(" ", 16, newClassSize, |
| newClassBytes); |
| } |
| } |
| |
| /* ============================================================================= */ |
| |
| /** Agent algorithm. */ |
| static void JNICALL |
| agentProc(jvmtiEnv* jvmti, JNIEnv* agentJNI, void* arg) { |
| |
| /*Wait for debuggee to read new byte codes nsk_jvmti_waitForSync#1*/ |
| NSK_DISPLAY0("Wait for debuggee to read new byte codes nsk_jvmti_waitForSync#1\n"); |
| if (!nsk_jvmti_waitForSync(timeout)) |
| return; |
| |
| if (!nsk_jvmti_resumeSync()) |
| return; |
| |
| NSK_DISPLAY0("Wait for debuggee to load tested class by classLoader\n"); |
| /*Wait for debuggee to load next class nsk_jvmti_waitForSync#2*/ |
| if (!nsk_jvmti_waitForSync(timeout)) |
| return; |
| |
| if (!nsk_jvmti_resumeSync()) |
| return; |
| |
| /*Wait for debuggee to check instrumentation code works nsk_jvmti_waitForSync#3*/ |
| NSK_DISPLAY0("Wait for debuggee to check instrumentation code works nsk_jvmti_waitForSync#3\n"); |
| if (!nsk_jvmti_waitForSync(timeout)) |
| return; |
| |
| NSK_DISPLAY0("Notification disabled for CLASS_FILE_LOAD_HOOK event\n"); |
| if (!NSK_JVMTI_VERIFY( |
| NSK_CPP_STUB4(SetEventNotificationMode, jvmti, JVMTI_DISABLE, |
| JVMTI_EVENT_CLASS_FILE_LOAD_HOOK, NULL))) { |
| nsk_jvmti_setFailStatus(); |
| return; |
| } |
| |
| if (!nsk_jvmti_resumeSync()) |
| return; |
| |
| /*Wait for debuggee to set classes to be redefined nsk_jvmti_waitForSync#4*/ |
| NSK_DISPLAY0("Wait for debuggee to set classes to be redefined nsk_jvmti_waitForSync#4\n"); |
| if (!nsk_jvmti_waitForSync(timeout)) |
| return; |
| |
| NSK_DISPLAY0("Redfine class with old byte code\n"); |
| NSK_DISPLAY3("class definition:\n\t0x%p, 0x%p:%d\n", |
| oldClassDef.klass, |
| oldClassDef.class_bytes, |
| oldClassDef.class_byte_count); |
| if (nsk_getVerboseMode()) { |
| nsk_printHexBytes(" ", 16, oldClassDef.class_byte_count, |
| oldClassDef.class_bytes); |
| } |
| if (!NSK_JVMTI_VERIFY( |
| NSK_CPP_STUB3(RedefineClasses, jvmti, 1, &oldClassDef))) { |
| nsk_jvmti_setFailStatus(); |
| return; |
| } |
| |
| if (!nsk_jvmti_resumeSync()) |
| return; |
| |
| /*Wait for debuggee to check old byte code works nsk_jvmti_waitForSync#5*/ |
| NSK_DISPLAY0("Wait for debuggee to check old byte code works nsk_jvmti_waitForSync#5\n"); |
| if (!nsk_jvmti_waitForSync(timeout)) |
| return; |
| |
| NSK_CPP_STUB2(DeleteGlobalRef, agentJNI, oldClassDef.klass); |
| |
| NSK_DISPLAY0("Let debuggee to finish\n"); |
| if (!nsk_jvmti_resumeSync()) |
| return; |
| |
| } |
| |
| /* ============================================================================= */ |
| |
| /** Agent library initialization. */ |
| #ifdef STATIC_BUILD |
| JNIEXPORT jint JNICALL Agent_OnLoad_bi01t001(JavaVM *jvm, char *options, void *reserved) { |
| return Agent_Initialize(jvm, options, reserved); |
| } |
| JNIEXPORT jint JNICALL Agent_OnAttach_bi01t001(JavaVM *jvm, char *options, void *reserved) { |
| return Agent_Initialize(jvm, options, reserved); |
| } |
| JNIEXPORT jint JNI_OnLoad_bi01t001(JavaVM *jvm, char *options, void *reserved) { |
| return JNI_VERSION_1_8; |
| } |
| #endif |
| jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) { |
| |
| if (!NSK_VERIFY(nsk_jvmti_parseOptions(options))) |
| return JNI_ERR; |
| |
| timeout = nsk_jvmti_getWaitTime() * 60 * 1000; |
| |
| if (!NSK_VERIFY((jvmti = nsk_jvmti_createJVMTIEnv(jvm, reserved)) != NULL)) |
| return JNI_ERR; |
| |
| { |
| jvmtiCapabilities caps; |
| memset(&caps, 0, sizeof(caps)); |
| |
| caps.can_redefine_classes = 1; |
| if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB2(AddCapabilities, jvmti, &caps))) |
| return JNI_ERR; |
| } |
| |
| NSK_DISPLAY0("Set callback for CLASS_FILE_LOAD_HOOK event\n"); |
| { |
| jvmtiEventCallbacks callbacks; |
| jint size = (jint)sizeof(callbacks); |
| |
| memset(&callbacks, 0, size); |
| callbacks.ClassFileLoadHook = cbClassFileLoadHook; |
| if (!NSK_JVMTI_VERIFY( |
| NSK_CPP_STUB3(SetEventCallbacks, jvmti, &callbacks, size))) { |
| return JNI_ERR; |
| } |
| } |
| |
| NSK_DISPLAY0("Set notification enabled for CLASS_FILE_LOAD_HOOK event\n"); |
| if (!NSK_JVMTI_VERIFY( |
| NSK_CPP_STUB4(SetEventNotificationMode, jvmti, JVMTI_ENABLE, |
| JVMTI_EVENT_CLASS_FILE_LOAD_HOOK, NULL))) { |
| nsk_jvmti_setFailStatus(); |
| return NSK_FALSE; |
| } |
| |
| if (!NSK_VERIFY(nsk_jvmti_setAgentProc(agentProc, NULL))) |
| return JNI_ERR; |
| |
| return JNI_OK; |
| } |
| |
| /* ============================================================================= */ |
| |
| |
| #ifdef __cplusplus |
| } |
| #endif |
