| /* |
| * 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 |
| |
| static JNIEnv *jni = NULL; |
| static jvmtiEnv *jvmti = NULL; |
| static jvmtiEventCallbacks callbacks; |
| static jvmtiCapabilities caps; |
| static jlong timeout = 0; |
| |
| /* ============================================================================= */ |
| |
| static volatile long objectCount = 0, objectCountMax = 0; |
| static int userData = 0, callbackAborted = 0; |
| static int numberOfDeallocatedFromCallbacksDescriptors = 0; |
| |
| typedef struct ObjectDescStruct { |
| jlong tag; |
| jlong size; |
| struct ObjectDescStruct *next; |
| } ObjectDesc; |
| |
| static ObjectDesc *objectDescList, *objectDescListStart, *objectDescBuf; |
| static ObjectDesc* *objectDescArr; |
| static short* deallocatedFlagsArr; |
| |
| /* ============================================================================= */ |
| |
| void JNICALL |
| ObjectFree(jvmtiEnv *jvmti_env, jlong tag) { |
| /* decrement number of expected objects */ |
| objectCount--; |
| } |
| |
| /* ============================================================================= */ |
| |
| |
| /** jvmtiHeapRootCallback for first iteration. */ |
| jvmtiIterationControl JNICALL |
| heapRootCallbackForFirstObjectsIteration( jvmtiHeapRootKind root_kind, |
| jlong class_tag, |
| jlong size, |
| jlong* tag_ptr, |
| void* user_data) { |
| |
| if (*tag_ptr != 0) return JVMTI_ITERATION_CONTINUE; |
| |
| /* Set tag */ |
| *tag_ptr = (jlong)++objectCount; |
| |
| if (!NSK_JVMTI_VERIFY( |
| NSK_CPP_STUB3(Allocate, jvmti, (sizeof(ObjectDesc)), |
| (unsigned char**)&objectDescBuf))) { |
| nsk_jvmti_setFailStatus(); |
| callbackAborted = 1; |
| NSK_COMPLAIN0("heapRootCallbackForFirstObjectsIteration: Allocation failed. Iteration aborted.\n"); |
| return JVMTI_ITERATION_ABORT; |
| } |
| |
| (*objectDescList).tag = *tag_ptr; |
| (*objectDescList).size = size; |
| (*objectDescList).next = objectDescBuf; |
| |
| /* step to next list element */ |
| objectDescList = (*objectDescList).next; |
| |
| return JVMTI_ITERATION_CONTINUE; |
| } |
| |
| /** jvmtiHeapRootCallback for second iteration. */ |
| jvmtiIterationControl JNICALL |
| heapRootCallbackForSecondObjectsIteration( jvmtiHeapRootKind root_kind, |
| jlong class_tag, |
| jlong size, |
| jlong* tag_ptr, |
| void* user_data) { |
| |
| long ind = (long)((*tag_ptr) - 1); |
| |
| if (*tag_ptr == 0) return JVMTI_ITERATION_CONTINUE; |
| |
| /* |
| ObjectDesc *objectDesc = objectDescArr[ind]; |
| jlong tag = (*objectDesc).tag; |
| */ |
| if (ind < 0 || ind > objectCountMax ) { |
| NSK_COMPLAIN1("heapRootCallbackForSecondObjectsIteration: invalid object tag value: %d\n", (long)*tag_ptr); |
| nsk_jvmti_setFailStatus(); |
| callbackAborted = 1; |
| return JVMTI_ITERATION_ABORT; |
| } |
| /* |
| NSK_DISPLAY3("heapRootCallbackForSecondObjectsIteration: *tag_ptr %6d , tag %6d , objectCount %6d\n", |
| (long)*tag_ptr, (long)tag, objectCount); |
| */ |
| /* Deallocate memory of list element*/ |
| if (!NSK_JVMTI_VERIFY( |
| NSK_CPP_STUB2(Deallocate, jvmti, (unsigned char*)objectDescArr[ind]))) { |
| nsk_jvmti_setFailStatus(); |
| callbackAborted = 1; |
| NSK_COMPLAIN0("heapRootCallbackForSecondObjectsIteration: Deallocation failed. Iteration aborted.\n"); |
| return JVMTI_ITERATION_ABORT; |
| } |
| |
| numberOfDeallocatedFromCallbacksDescriptors++; |
| deallocatedFlagsArr[ind] = 1; |
| |
| /* unset tag */ |
| *tag_ptr = 0; |
| objectCount--; |
| |
| return JVMTI_ITERATION_CONTINUE; |
| } |
| |
| /** jvmtiStackReferenceCallback for first iteration. */ |
| jvmtiIterationControl JNICALL |
| stackReferenceCallbackForFirstObjectsIteration( jvmtiHeapRootKind root_kind, |
| jlong class_tag, |
| jlong size, |
| jlong* tag_ptr, |
| jlong thread_tag, |
| jint depth, |
| jmethodID method, |
| jint slot, |
| void* user_data) { |
| |
| if (*tag_ptr != 0) return JVMTI_ITERATION_CONTINUE; |
| |
| /* Set tag */ |
| *tag_ptr = (jlong)++objectCount; |
| |
| if (!NSK_JVMTI_VERIFY( |
| NSK_CPP_STUB3(Allocate, jvmti, (sizeof(ObjectDesc)), |
| (unsigned char**)&objectDescBuf))) { |
| nsk_jvmti_setFailStatus(); |
| callbackAborted = 1; |
| NSK_COMPLAIN0("stackReferenceCallbackForFirstObjectsIteration: Allocation failed. Iteration aborted.\n"); |
| return JVMTI_ITERATION_ABORT; |
| } |
| |
| (*objectDescList).tag = *tag_ptr; |
| (*objectDescList).size = size; |
| (*objectDescList).next = objectDescBuf; |
| |
| /* step to next list element */ |
| objectDescList = (*objectDescList).next; |
| |
| return JVMTI_ITERATION_CONTINUE; |
| } |
| |
| /** jvmtiStackReferenceCallback for second iteration. */ |
| jvmtiIterationControl JNICALL |
| stackReferenceCallbackForSecondObjectsIteration( jvmtiHeapRootKind root_kind, |
| jlong class_tag, |
| jlong size, |
| jlong* tag_ptr, |
| jlong thread_tag, |
| jint depth, |
| jmethodID method, |
| jint slot, |
| void* user_data) { |
| |
| long ind = (long)((*tag_ptr) - 1); |
| |
| if (*tag_ptr == 0) return JVMTI_ITERATION_CONTINUE; |
| |
| /* |
| ObjectDesc *objectDesc = objectDescArr[ind]; |
| jlong tag = (*objectDesc).tag; |
| */ |
| if (ind < 0 || ind > objectCountMax ) { |
| NSK_COMPLAIN1("stackReferenceCallbackForSecondObjectsIteration: invalid object tag value: %d\n", (long)*tag_ptr); |
| nsk_jvmti_setFailStatus(); |
| callbackAborted = 1; |
| return JVMTI_ITERATION_ABORT; |
| } |
| /* |
| NSK_DISPLAY3("stackReferenceCallbackForSecondObjectsIteration: *tag_ptr %6d , tag %6d , objectCount %6d\n", |
| (long)*tag_ptr, (long)tag, objectCount); |
| */ |
| /* Deallocate memory of list element*/ |
| if (!NSK_JVMTI_VERIFY( |
| NSK_CPP_STUB2(Deallocate, jvmti, (unsigned char*)objectDescArr[ind]))) { |
| nsk_jvmti_setFailStatus(); |
| callbackAborted = 1; |
| NSK_COMPLAIN0("stackReferenceCallbackForSecondObjectsIteration: Deallocation failed. Iteration aborted.\n"); |
| return JVMTI_ITERATION_ABORT; |
| } |
| |
| numberOfDeallocatedFromCallbacksDescriptors++; |
| deallocatedFlagsArr[ind] = 1; |
| |
| /* unset tag */ |
| *tag_ptr = 0; |
| objectCount--; |
| |
| return JVMTI_ITERATION_CONTINUE; |
| } |
| |
| /** jvmtiObjectReferenceCallback for first iteration. */ |
| jvmtiIterationControl JNICALL |
| objectReferenceCallbackForFirstObjectsIteration( jvmtiObjectReferenceKind reference_kind, |
| jlong class_tag, |
| jlong size, |
| jlong* tag_ptr, |
| jlong referrer_tag, |
| jint referrer_index, |
| void* user_data) { |
| |
| if (*tag_ptr != 0) return JVMTI_ITERATION_CONTINUE; |
| |
| /* Set tag */ |
| *tag_ptr = (jlong)++objectCount; |
| |
| if (!NSK_JVMTI_VERIFY( |
| NSK_CPP_STUB3(Allocate, jvmti, (sizeof(ObjectDesc)), |
| (unsigned char**)&objectDescBuf))) { |
| nsk_jvmti_setFailStatus(); |
| callbackAborted = 1; |
| NSK_COMPLAIN0("objectReferenceCallbackForFirstObjectsIteration: Allocation failed. Iteration aborted.\n"); |
| return JVMTI_ITERATION_ABORT; |
| } |
| |
| (*objectDescList).tag = *tag_ptr; |
| (*objectDescList).size = size; |
| (*objectDescList).next = objectDescBuf; |
| |
| /* step to next list element */ |
| objectDescList = (*objectDescList).next; |
| |
| return JVMTI_ITERATION_CONTINUE; |
| } |
| |
| /** jvmtiObjectReferenceCallback for second iteration. */ |
| jvmtiIterationControl JNICALL |
| objectReferenceCallbackForSecondObjectsIteration( jvmtiObjectReferenceKind reference_kind, |
| jlong class_tag, |
| jlong size, |
| jlong* tag_ptr, |
| jlong referrer_tag, |
| jint referrer_index, |
| void* user_data) { |
| |
| long ind = (long)((*tag_ptr) - 1); |
| |
| if (*tag_ptr == 0) return JVMTI_ITERATION_CONTINUE; |
| |
| /* |
| ObjectDesc *objectDesc = objectDescArr[ind]; |
| jlong tag = (*objectDesc).tag; |
| */ |
| if (ind < 0 || ind > objectCountMax ) { |
| NSK_COMPLAIN1("objectReferenceCallbackForSecondObjectsIteration: invalid object tag value: %d\n", (long)*tag_ptr); |
| nsk_jvmti_setFailStatus(); |
| callbackAborted = 1; |
| return JVMTI_ITERATION_ABORT; |
| } |
| /* |
| NSK_DISPLAY3("objectReferenceCallbackForSecondObjectsIteration: *tag_ptr %6d , tag %6d , objectCount %6d\n", |
| (long)*tag_ptr, (long)tag, objectCount); |
| */ |
| /* Deallocate memory of list element*/ |
| if (!NSK_JVMTI_VERIFY( |
| NSK_CPP_STUB2(Deallocate, jvmti, (unsigned char*)objectDescArr[ind]))) { |
| nsk_jvmti_setFailStatus(); |
| callbackAborted = 1; |
| NSK_COMPLAIN0("objectReferenceCallbackForSecondObjectsIteration: Deallocation failed. Iteration aborted.\n"); |
| return JVMTI_ITERATION_ABORT; |
| } |
| |
| numberOfDeallocatedFromCallbacksDescriptors++; |
| deallocatedFlagsArr[ind] = 1; |
| |
| /* unset tag */ |
| *tag_ptr = 0; |
| objectCount--; |
| |
| return JVMTI_ITERATION_CONTINUE; |
| } |
| |
| /* ============================================================================= */ |
| |
| /** Agent algorithm. */ |
| static void JNICALL |
| agentProc(jvmtiEnv* jvmti, JNIEnv* jni, void* arg) { |
| |
| long ind; |
| |
| NSK_DISPLAY0("Wait for debugee start\n"); |
| if (!NSK_VERIFY(nsk_jvmti_waitForSync(timeout))) |
| return; |
| |
| { |
| do { |
| /* Allocate memory for first element of objectList */ |
| if (!NSK_JVMTI_VERIFY( |
| NSK_CPP_STUB3(Allocate, jvmti, (sizeof(ObjectDesc)), |
| (unsigned char**)&objectDescBuf))) { |
| nsk_jvmti_setFailStatus(); |
| break; |
| } |
| objectDescList = objectDescBuf; |
| objectDescListStart = objectDescList; |
| |
| NSK_DISPLAY0("Calling IterateOverReachableObjects with allocating object descriptors\n"); |
| { |
| if (!NSK_JVMTI_VERIFY( |
| NSK_CPP_STUB5(IterateOverReachableObjects, |
| jvmti, |
| heapRootCallbackForFirstObjectsIteration, |
| stackReferenceCallbackForFirstObjectsIteration, |
| objectReferenceCallbackForFirstObjectsIteration, |
| &userData))) { |
| nsk_jvmti_setFailStatus(); |
| break; |
| } |
| } |
| if (callbackAborted) break; |
| |
| if (objectCount == 0) { |
| NSK_COMPLAIN0("First IterateOverReachableObjects call had not visited any object\n"); |
| nsk_jvmti_setFailStatus(); |
| break; |
| } else { |
| NSK_DISPLAY1("Number of objects the first IterateOverReachableObjects visited: %d\n", objectCount); |
| } |
| |
| if (callbackAborted) break; |
| |
| objectCountMax = objectCount; |
| |
| /* Deallocate last unnecessary descriptor */ |
| if (!NSK_JVMTI_VERIFY( |
| NSK_CPP_STUB2(Deallocate, jvmti, (unsigned char*)objectDescList))) { |
| NSK_COMPLAIN0("Unable to deallocate last unnecessary descriptor. \n"); |
| nsk_jvmti_setFailStatus(); |
| break; |
| } |
| |
| /* Allocate memory for array to save pointers to ObjectDescList elements */ |
| if (!NSK_JVMTI_VERIFY( |
| NSK_CPP_STUB3(Allocate, jvmti, (objectCount * sizeof(ObjectDesc*)), |
| (unsigned char**)&objectDescArr))) { |
| nsk_jvmti_setFailStatus(); |
| break; |
| } |
| |
| /* Allocate memory for flags array and fill with false values */ |
| if (!NSK_JVMTI_VERIFY( |
| NSK_CPP_STUB3(Allocate, jvmti, (objectCountMax * sizeof(short)), |
| (unsigned char**)&deallocatedFlagsArr))) { |
| nsk_jvmti_setFailStatus(); |
| break; |
| } |
| |
| for (ind = 0; ind < objectCountMax; ind++) { |
| deallocatedFlagsArr[ind] = 0; |
| } |
| |
| objectDescList = objectDescListStart; |
| { |
| /* Save all pointers to ObjectDescList elements in objectDescArr */ |
| for (ind = 0; ind < objectCount; ind++) { |
| objectDescArr[ind] = objectDescList; |
| objectDescList = (*objectDescList).next; |
| } |
| } |
| |
| NSK_DISPLAY0("Calling IterateOverReachableObjects with deallocating object descriptors\n"); |
| { |
| if (!NSK_JVMTI_VERIFY( |
| NSK_CPP_STUB5(IterateOverReachableObjects, |
| jvmti, |
| heapRootCallbackForSecondObjectsIteration, |
| stackReferenceCallbackForSecondObjectsIteration, |
| objectReferenceCallbackForSecondObjectsIteration, |
| &userData))) { |
| nsk_jvmti_setFailStatus(); |
| break; |
| } |
| } |
| |
| if (numberOfDeallocatedFromCallbacksDescriptors == 0) { |
| NSK_COMPLAIN1("Deallocate func. hasn't been called from IterateOverReachableObjects'callbacks. " |
| "numberOfDeallocatedFromCallbacksDescriptors = %d\n", numberOfDeallocatedFromCallbacksDescriptors); |
| nsk_jvmti_setFailStatus(); |
| } |
| |
| for (ind = 0; ind < objectCountMax; ind++) { |
| if (!deallocatedFlagsArr[ind]) { |
| if (!NSK_JVMTI_VERIFY( |
| NSK_CPP_STUB2(Deallocate, jvmti, (unsigned char*)objectDescArr[ind]))) { |
| NSK_COMPLAIN1("Unable to deallocate descriptor. Index = %d \n", ind); |
| nsk_jvmti_setFailStatus(); |
| return; |
| } |
| } |
| } |
| |
| if (!NSK_JVMTI_VERIFY( |
| NSK_CPP_STUB2(Deallocate, jvmti, (unsigned char*)objectDescArr))) { |
| nsk_jvmti_setFailStatus(); |
| } |
| |
| if (!NSK_JVMTI_VERIFY( |
| NSK_CPP_STUB2(Deallocate, jvmti, (unsigned char*)deallocatedFlagsArr))) { |
| nsk_jvmti_setFailStatus(); |
| } |
| |
| } while (0); |
| } |
| |
| NSK_DISPLAY0("Let debugee to finish\n"); |
| if (!NSK_VERIFY(nsk_jvmti_resumeSync())) |
| return; |
| } |
| |
| /* ============================================================================= */ |
| |
| /* ============================================================================= */ |
| |
| /** Agent library initialization. */ |
| #ifdef STATIC_BUILD |
| JNIEXPORT jint JNICALL Agent_OnLoad_iterreachobj002(JavaVM *jvm, char *options, void *reserved) { |
| return Agent_Initialize(jvm, options, reserved); |
| } |
| JNIEXPORT jint JNICALL Agent_OnAttach_iterreachobj002(JavaVM *jvm, char *options, void *reserved) { |
| return Agent_Initialize(jvm, options, reserved); |
| } |
| JNIEXPORT jint JNI_OnLoad_iterreachobj002(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; |
| |
| memset(&caps, 0, sizeof(caps)); |
| caps.can_tag_objects = 1; |
| caps.can_generate_object_free_events = 1; |
| if (!NSK_JVMTI_VERIFY( |
| NSK_CPP_STUB2(AddCapabilities, jvmti, &caps))) { |
| return JNI_ERR; |
| } |
| |
| if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB2(GetCapabilities, |
| jvmti, &caps))) |
| return JNI_ERR; |
| |
| if (!caps.can_tag_objects) |
| NSK_DISPLAY0("Warning: tagging objects is not available\n"); |
| if (!caps.can_generate_object_free_events) |
| NSK_DISPLAY0("Warning: generation of object free events is not available\n"); |
| |
| /* set event callback */ |
| NSK_DISPLAY0("setting event callbacks ...\n"); |
| (void) memset(&callbacks, 0, sizeof(callbacks)); |
| |
| callbacks.ObjectFree = &ObjectFree; |
| if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB3(SetEventCallbacks, |
| jvmti, &callbacks, sizeof(callbacks)))) |
| return JNI_ERR; |
| |
| NSK_DISPLAY0("setting event callbacks done.\n"); |
| |
| NSK_DISPLAY0("enabling JVMTI events ...\n"); |
| if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB4(SetEventNotificationMode, |
| jvmti, JVMTI_ENABLE, JVMTI_EVENT_OBJECT_FREE, NULL))) |
| return JNI_ERR; |
| NSK_DISPLAY0("enabling the events done.\n"); |
| |
| if (!NSK_VERIFY(nsk_jvmti_setAgentProc(agentProc, NULL))) |
| return JNI_ERR; |
| |
| return JNI_OK; |
| } |
| |
| /* ============================================================================= */ |
| |
| #ifdef __cplusplus |
| } |
| #endif |
