| /* |
| * 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 <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include <jvmti.h> |
| #include "agent_common.h" |
| |
| #include "nsk_tools.h" |
| #include "native_thread.h" |
| #include "JVMTITools.h" |
| #include "jvmti_tools.h" |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| #define PASSED 0 |
| #define STATUS_FAILED 2 |
| |
| #define MAX_ATTEMPTS 15 |
| |
| static const char *expHSMethod = "redefclass030HotMethod"; |
| static const char *expHSSignature = "(I)V"; |
| |
| #define EVENTS_COUNT 2 |
| static jvmtiEvent eventsList[EVENTS_COUNT] = { |
| JVMTI_EVENT_COMPILED_METHOD_LOAD, |
| JVMTI_EVENT_COMPILED_METHOD_UNLOAD |
| }; |
| |
| static jvmtiEnv *jvmti = NULL; |
| static jlong timeout = 0; |
| static volatile int fire = 0; /* CompiledMethodLoad received for hotspot method */ |
| static jmethodID hsMethodID; /* hotspot method ID */ |
| |
| static volatile int enteredHotMethod = 0; /* "hot" method is entered */ |
| |
| static jint bytesCount; /* number of bytes of a redefining class */ |
| static jbyte *clsBytes; /* bytes defining a redefining class */ |
| |
| /** pass info about redefinition to Java **/ |
| JNIEXPORT jboolean JNICALL Java_nsk_jvmti_RedefineClasses_redefclass030_isRedefinitionOccurred |
| (JNIEnv *jni_env, jclass cls) |
| { |
| if (fire == 1) { |
| NSK_DISPLAY0("isRedefinitionOccurred is called: fired!\n"); |
| return JNI_TRUE; |
| } else { |
| return JNI_FALSE; |
| } |
| } |
| |
| /** notify native agent from Java when "hot" method is executed **/ |
| JNIEXPORT void JNICALL Java_nsk_jvmti_RedefineClasses_redefclass030_notifyNativeAgent |
| (JNIEnv *jni_env, jclass cls) |
| { |
| if (enteredHotMethod == 0) { |
| NSK_DISPLAY0("notifyNativeAgent is called\n"); |
| enteredHotMethod = 1; |
| } |
| } |
| |
| /** pass bytecode to native agent for redefinition **/ |
| JNIEXPORT void JNICALL Java_nsk_jvmti_RedefineClasses_redefclass030_storeClassBytes |
| (JNIEnv *jni_env, jclass cls, jbyteArray classBytes) { |
| jboolean isCopy; |
| |
| bytesCount = NSK_CPP_STUB2(GetArrayLength, jni_env, classBytes); |
| clsBytes = |
| NSK_CPP_STUB3(GetByteArrayElements, jni_env, classBytes, &isCopy); |
| } |
| |
| /** callback functions **/ |
| void JNICALL |
| CompiledMethodLoad(jvmtiEnv *jvmti_env, jmethodID method, jint code_size, |
| const void* code_addr, jint map_length, const jvmtiAddrLocationMap* map, |
| const void* compile_info) { |
| char *name; |
| char *sig; |
| |
| NSK_DISPLAY0("CompiledMethodLoad event received for:\n"); |
| if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB5(GetMethodName, |
| jvmti_env, method, &name, &sig, NULL))) { |
| nsk_jvmti_setFailStatus(); |
| return; |
| } |
| NSK_DISPLAY5("\tmethod: name=\"%s\" signature=\"%s\"\n" |
| "\tcompiled code size=%d\n" |
| "\tstarting native address=0x%p\n" |
| "\tnumber of address location map entries=%d\n", |
| name, sig, code_size, code_addr, map_length); |
| |
| if ((strcmp(name, expHSMethod) == 0) && |
| (strcmp(sig, expHSSignature) == 0)) { |
| NSK_DISPLAY0("CompiledMethodLoad: a tested hotspot method found\n"); |
| |
| // CR 6604375: check whether "hot" method was entered |
| if (enteredHotMethod) { |
| hsMethodID = method; |
| fire = 1; |
| } else { |
| NSK_DISPLAY0("Compilation occured before method execution. Ignoring.\n"); |
| } |
| } |
| } |
| |
| JNIEXPORT void JNICALL |
| CompiledMethodUnload(jvmtiEnv* jvmti_env, jmethodID method, |
| const void* code_addr) { |
| char *name; |
| char *sig; |
| jvmtiError err; |
| |
| NSK_DISPLAY0("CompiledMethodUnload event received\n"); |
| // Check for the case that the class has been unloaded |
| err = (*jvmti_env)->GetMethodName(jvmti_env, method, &name, &sig, NULL); |
| if (err == JVMTI_ERROR_NONE) { |
| NSK_DISPLAY3("for: \tmethod: name=\"%s\" signature=\"%s\"\n\tnative address=0x%p\n", |
| name, sig, code_addr); |
| NSK_CPP_STUB2(Deallocate, jvmti_env, (unsigned char*)name); |
| NSK_CPP_STUB2(Deallocate, jvmti_env, (unsigned char*)sig); |
| } |
| } |
| /************************/ |
| |
| /** agent's procedure **/ |
| static void JNICALL |
| agentProc(jvmtiEnv* jvmti_env, JNIEnv* jni_env, void* arg) { |
| int tries = 0; |
| jclass decl_cls; |
| char *cls_sig; |
| jvmtiClassDefinition classDef; |
| |
| /* testing sync */ |
| NSK_DISPLAY1("agentProc: waiting for the debuggee start for %d msecs...\n\n", |
| (int) timeout); |
| if (!nsk_jvmti_waitForSync(timeout)) |
| return; |
| NSK_DISPLAY0("agentProc: resuming the debuggee ...\n\n"); |
| if (!nsk_jvmti_resumeSync()) |
| return; |
| |
| /* at first, send all generated CompiledMethodLoad events */ |
| NSK_DISPLAY0("agentProc: sending all generated CompiledMethodLoad events ...\n\n"); |
| if (!NSK_JVMTI_VERIFY( |
| NSK_CPP_STUB2(GenerateEvents, jvmti, JVMTI_EVENT_COMPILED_METHOD_LOAD))) { |
| nsk_jvmti_setFailStatus(); |
| nsk_jvmti_resumeSync(); |
| return; |
| } |
| |
| NSK_DISPLAY0("agentProc: waiting for hotspot method compilation...\n\n"); |
| do { |
| THREAD_sleep(1); |
| tries++; |
| if (tries > MAX_ATTEMPTS) { |
| printf("WARNING: CompiledMethodLoad event is still not received for \"%s\" after %d attempts\n" |
| "\tThe test has no results\n\n", |
| expHSMethod, MAX_ATTEMPTS); |
| nsk_jvmti_resumeSync(); |
| exit(95 + PASSED); |
| } |
| } while(fire == 0); |
| |
| NSK_DISPLAY0("agentProc: hotspot method compiled\n\n"); |
| |
| if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB3(GetMethodDeclaringClass, |
| jvmti_env, hsMethodID, &decl_cls))) { |
| nsk_jvmti_setFailStatus(); |
| nsk_jvmti_resumeSync(); |
| return; |
| } |
| if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB4(GetClassSignature, |
| jvmti_env, decl_cls, &cls_sig, NULL))) { |
| nsk_jvmti_setFailStatus(); |
| nsk_jvmti_resumeSync(); |
| return; |
| } else { |
| NSK_DISPLAY1("agentProc: hotspot method class signature: \"%s\"\n\n", |
| cls_sig); |
| } |
| |
| /* fill the structure jvmtiClassDefinition */ |
| classDef.klass = decl_cls; |
| classDef.class_byte_count = bytesCount; |
| classDef.class_bytes = (unsigned char*) clsBytes; |
| |
| NSK_DISPLAY1("agentProc: >>>>>>>> Invoke RedefineClasses():\n" |
| "\tnew class byte count=%d\n", |
| classDef.class_byte_count); |
| if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB3(RedefineClasses, |
| jvmti, 1, &classDef))) { |
| nsk_jvmti_setFailStatus(); |
| nsk_jvmti_resumeSync(); |
| return; |
| } |
| NSK_DISPLAY0("agentProc: <<<<<<<< RedefineClasses() is successfully done\n"); |
| |
| /* testing sync */ |
| NSK_DISPLAY1("agentProc: waiting for the debuggee finish for %d msecs...\n\n", |
| (int) timeout); |
| if (!nsk_jvmti_waitForSync(timeout)) |
| return; |
| NSK_DISPLAY0("agentProc: final resuming of the debuggee ...\n\n"); |
| if (!nsk_jvmti_resumeSync()) |
| return; |
| |
| NSK_DISPLAY0("agentProc: finished\n\n"); |
| } |
| |
| #ifdef STATIC_BUILD |
| JNIEXPORT jint JNICALL Agent_OnLoad_redefclass030(JavaVM *jvm, char *options, void *reserved) { |
| return Agent_Initialize(jvm, options, reserved); |
| } |
| JNIEXPORT jint JNICALL Agent_OnAttach_redefclass030(JavaVM *jvm, char *options, void *reserved) { |
| return Agent_Initialize(jvm, options, reserved); |
| } |
| JNIEXPORT jint JNI_OnLoad_redefclass030(JavaVM *jvm, char *options, void *reserved) { |
| return JNI_VERSION_1_8; |
| } |
| #endif |
| jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) { |
| jvmtiCapabilities caps; |
| jvmtiEventCallbacks callbacks; |
| |
| /* init framework and parse options */ |
| if (!NSK_VERIFY(nsk_jvmti_parseOptions(options))) |
| return JNI_ERR; |
| |
| /* obtain WAITTIME parameter */ |
| timeout = nsk_jvmti_getWaitTime() * 60000; |
| NSK_DISPLAY1("waittime=%d msecs\n", (int) timeout); |
| |
| /* create JVMTI environment */ |
| if (!NSK_VERIFY((jvmti = |
| nsk_jvmti_createJVMTIEnv(jvm, reserved)) != NULL)) |
| return JNI_ERR; |
| |
| /* add required capabilities */ |
| memset(&caps, 0, sizeof(jvmtiCapabilities)); |
| caps.can_generate_compiled_method_load_events = 1; |
| caps.can_redefine_classes = 1; |
| if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB2(AddCapabilities, |
| jvmti, &caps))) |
| return JNI_ERR; |
| |
| /* set event callback */ |
| NSK_DISPLAY0("setting event callbacks ...\n"); |
| (void) memset(&callbacks, 0, sizeof(callbacks)); |
| callbacks.CompiledMethodLoad = &CompiledMethodLoad; |
| callbacks.CompiledMethodUnload = &CompiledMethodUnload; |
| if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB3(SetEventCallbacks, |
| jvmti, &callbacks, sizeof(callbacks)))) |
| return JNI_ERR; |
| |
| NSK_DISPLAY0("setting event callbacks done\nenabling events ...\n"); |
| if (!nsk_jvmti_enableEvents(JVMTI_ENABLE, EVENTS_COUNT, |
| eventsList, NULL)) |
| return JNI_ERR; |
| NSK_DISPLAY0("enabling the events done\n\n"); |
| |
| /* register agent proc */ |
| if (!NSK_VERIFY(nsk_jvmti_setAgentProc(agentProc, NULL))) |
| return JNI_ERR; |
| |
| return JNI_OK; |
| } |
| |
| #ifdef __cplusplus |
| } |
| #endif |
