| /* |
| * 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 <inttypes.h> |
| #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 PASSED 0 |
| #define STATUS_FAILED 2 |
| |
| typedef struct { |
| jfieldID fid; |
| char *f_name; |
| char *f_sig; |
| jboolean is_static; |
| jint expected; |
| jint count; |
| } watch_info; |
| |
| static jvmtiEnv *jvmti = NULL; |
| static jvmtiEventCallbacks callbacks; |
| static jvmtiCapabilities caps; |
| static jint result = PASSED; |
| static jboolean printdump = JNI_FALSE; |
| static int missesCount = 0; |
| static watch_info watches[] = { |
| { NULL, "staticBoolean", "Z", JNI_TRUE, 0, 0 }, |
| { NULL, "staticByte", "B", JNI_TRUE, 0, 0 }, |
| { NULL, "staticShort", "S", JNI_TRUE, 0, 0 }, |
| { NULL, "staticInt", "I", JNI_TRUE, 0, 0 }, |
| { NULL, "staticLong", "J", JNI_TRUE, 0, 0 }, |
| { NULL, "staticFloat", "F", JNI_TRUE, 0, 0 }, |
| { NULL, "staticDouble", "D", JNI_TRUE, 0, 0 }, |
| { NULL, "staticChar", "C", JNI_TRUE, 0, 0 }, |
| { NULL, "staticObject", "Ljava/lang/Object;", JNI_TRUE, 0, 0 }, |
| { NULL, "staticArrInt", "[I", JNI_TRUE, 0, 0 }, |
| |
| { NULL, "instanceBoolean", "Z", JNI_FALSE, 0, 0 }, |
| { NULL, "instanceByte", "B", JNI_FALSE, 0, 0 }, |
| { NULL, "instanceShort", "S", JNI_FALSE, 0, 0 }, |
| { NULL, "instanceInt", "I", JNI_FALSE, 0, 0 }, |
| { NULL, "instanceLong", "J", JNI_FALSE, 0, 0 }, |
| { NULL, "instanceFloat", "F", JNI_FALSE, 0, 0 }, |
| { NULL, "instanceDouble", "D", JNI_FALSE, 0, 0 }, |
| { NULL, "instanceChar", "C", JNI_FALSE, 0, 0 }, |
| { NULL, "instanceObject", "Ljava/lang/Object;", JNI_FALSE, 0, 0 }, |
| { NULL, "instanceArrInt", "[I", JNI_FALSE, 0, 0 } |
| }; |
| |
| |
| void JNICALL FieldModification(jvmtiEnv *jvmti_env, JNIEnv *env, |
| jthread thr, jmethodID method, jlocation location, jclass field_klass, jobject obj, |
| jfieldID field, char sig, jvalue new_value) { |
| size_t i; |
| |
| for (i = 0; i < sizeof(watches)/sizeof(watch_info); i++) { |
| if (field == watches[i].fid) { |
| watches[i].count++; |
| return; |
| } |
| } |
| missesCount++; |
| } |
| |
| #ifdef STATIC_BUILD |
| JNIEXPORT jint JNICALL Agent_OnLoad_setfmodw006(JavaVM *jvm, char *options, void *reserved) { |
| return Agent_Initialize(jvm, options, reserved); |
| } |
| JNIEXPORT jint JNICALL Agent_OnAttach_setfmodw006(JavaVM *jvm, char *options, void *reserved) { |
| return Agent_Initialize(jvm, options, reserved); |
| } |
| JNIEXPORT jint JNI_OnLoad_setfmodw006(JavaVM *jvm, char *options, void *reserved) { |
| return JNI_VERSION_1_8; |
| } |
| #endif |
| jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) { |
| jint res; |
| jvmtiError err; |
| |
| if (options != NULL && strcmp(options, "printdump") == 0) { |
| printdump = JNI_TRUE; |
| } |
| |
| res = JNI_ENV_PTR(jvm)->GetEnv(JNI_ENV_ARG(jvm, (void **) &jvmti), |
| JVMTI_VERSION_1_1); |
| if (res != JNI_OK || jvmti == NULL) { |
| printf("Wrong result of a valid call to GetEnv!\n"); |
| 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_generate_field_modification_events) { |
| callbacks.FieldModification = &FieldModification; |
| 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; |
| } |
| } else { |
| printf("Warning: FieldModification watch is not implemented\n"); |
| } |
| |
| return JNI_OK; |
| } |
| |
| JNIEXPORT void JNICALL |
| Java_nsk_jvmti_SetFieldModificationWatch_setfmodw006_getReady(JNIEnv *env, |
| jclass cls, jint n) { |
| jvmtiError err; |
| size_t i; |
| |
| if (jvmti == NULL) { |
| printf("JVMTI client was not properly loaded!\n"); |
| result = STATUS_FAILED; |
| return; |
| } |
| |
| if (!caps.can_generate_field_modification_events) { |
| return; |
| } |
| |
| if (printdump == JNI_TRUE) { |
| printf(">>> setting field modification watches ...\n"); |
| } |
| for (i = 0; i < sizeof(watches)/sizeof(watch_info); i++) { |
| if (watches[i].is_static == JNI_TRUE) { |
| watches[i].fid = |
| JNI_ENV_PTR(env)->GetStaticFieldID(JNI_ENV_ARG(env, cls), |
| watches[i].f_name, watches[i].f_sig); |
| } else { |
| watches[i].fid = |
| JNI_ENV_PTR(env)->GetFieldID(JNI_ENV_ARG(env, cls), |
| watches[i].f_name, watches[i].f_sig); |
| } |
| err = (*jvmti)->SetFieldModificationWatch(jvmti, cls, watches[i].fid); |
| if (err == JVMTI_ERROR_NONE) { |
| watches[i].expected = n; |
| } else { |
| printf("(SetFieldModificationWatch#%" PRIuPTR ") unexpected error: %s (%d)\n", |
| i, TranslateError(err), err); |
| result = STATUS_FAILED; |
| } |
| } |
| |
| err = (*jvmti)->SetEventNotificationMode(jvmti, JVMTI_ENABLE, |
| JVMTI_EVENT_FIELD_MODIFICATION, NULL); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("(SetEventNotificationMode) unexpected error: %s (%d)\n", |
| TranslateError(err), err); |
| result = STATUS_FAILED; |
| } |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_nsk_jvmti_SetFieldModificationWatch_setfmodw006_check(JNIEnv *env, |
| jclass cls, jboolean flag) { |
| size_t i; |
| jint expected; |
| |
| for (i = 0; i < sizeof(watches)/sizeof(watch_info); i++) { |
| if (printdump == JNI_TRUE && watches[i].count > 0) { |
| printf(">>> field %s modifications: %d\n", |
| watches[i].f_name, watches[i].count); |
| } |
| expected = (flag == JNI_TRUE) ? watches[i].expected : 0; |
| if (watches[i].count != expected) { |
| printf("(%s) wrong number of field modification events: %d,", |
| watches[i].f_name, watches[i].count); |
| printf(" expected: %d\n", expected); |
| result = STATUS_FAILED; |
| } |
| watches[i].count = 0; |
| } |
| |
| if (missesCount != 0) { |
| printf("%d unexpected field modification catches\n", missesCount); |
| missesCount = 0; |
| result = STATUS_FAILED; |
| } |
| return result; |
| } |
| |
| #ifdef __cplusplus |
| } |
| #endif |
