| /* |
| * 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 *m_cls; |
| char *m_name; |
| char *m_sig; |
| jlocation loc; |
| char *f_cls; |
| char *f_name; |
| char *f_sig; |
| jboolean is_static; |
| } watch_info; |
| |
| static jvmtiEnv *jvmti; |
| static jvmtiEventCallbacks callbacks; |
| static jvmtiCapabilities caps; |
| static jint result = PASSED; |
| static jboolean printdump = JNI_FALSE; |
| static int eventsExpected = 0; |
| static int eventsCount = 0; |
| static watch_info watches[] = { |
| { NULL, "Lnsk/jvmti/FieldAccess/fieldacc001a;", "run", "()I", 2, |
| "Lnsk/jvmti/FieldAccess/fieldacc001a;", "staticBoolean", "Z", JNI_TRUE }, |
| { NULL, "Lnsk/jvmti/FieldAccess/fieldacc001a;", "run", "()I", 6, |
| "Lnsk/jvmti/FieldAccess/fieldacc001a;", "instanceBoolean", "Z", JNI_FALSE }, |
| { NULL, "Lnsk/jvmti/FieldAccess/fieldacc001a;", "run", "()I", 15, |
| "Lnsk/jvmti/FieldAccess/fieldacc001a;", "staticByte", "B", JNI_TRUE }, |
| { NULL, "Lnsk/jvmti/FieldAccess/fieldacc001a;", "run", "()I", 19, |
| "Lnsk/jvmti/FieldAccess/fieldacc001a;", "instanceByte", "B", JNI_FALSE }, |
| { NULL, "Lnsk/jvmti/FieldAccess/fieldacc001a;", "run", "()I", 28, |
| "Lnsk/jvmti/FieldAccess/fieldacc001a;", "staticShort", "S", JNI_TRUE }, |
| { NULL, "Lnsk/jvmti/FieldAccess/fieldacc001a;", "run", "()I", 32, |
| "Lnsk/jvmti/FieldAccess/fieldacc001a;", "instanceShort", "S", JNI_FALSE }, |
| { NULL, "Lnsk/jvmti/FieldAccess/fieldacc001a;", "run", "()I", 41, |
| "Lnsk/jvmti/FieldAccess/fieldacc001a;", "staticInt", "I", JNI_TRUE }, |
| { NULL, "Lnsk/jvmti/FieldAccess/fieldacc001a;", "run", "()I", 45, |
| "Lnsk/jvmti/FieldAccess/fieldacc001a;", "instanceInt", "I", JNI_FALSE }, |
| { NULL, "Lnsk/jvmti/FieldAccess/fieldacc001a;", "run", "()I", 54, |
| "Lnsk/jvmti/FieldAccess/fieldacc001a;", "staticLong", "J", JNI_TRUE }, |
| { NULL, "Lnsk/jvmti/FieldAccess/fieldacc001a;", "run", "()I", 58, |
| "Lnsk/jvmti/FieldAccess/fieldacc001a;", "instanceLong", "J", JNI_FALSE }, |
| { NULL, "Lnsk/jvmti/FieldAccess/fieldacc001a;", "run", "()I", 68, |
| "Lnsk/jvmti/FieldAccess/fieldacc001a;", "staticFloat", "F", JNI_TRUE }, |
| { NULL, "Lnsk/jvmti/FieldAccess/fieldacc001a;", "run", "()I", 72, |
| "Lnsk/jvmti/FieldAccess/fieldacc001a;", "instanceFloat", "F", JNI_FALSE }, |
| { NULL, "Lnsk/jvmti/FieldAccess/fieldacc001a;", "run", "()I", 82, |
| "Lnsk/jvmti/FieldAccess/fieldacc001a;", "staticDouble", "D", JNI_TRUE }, |
| { NULL, "Lnsk/jvmti/FieldAccess/fieldacc001a;", "run", "()I", 86, |
| "Lnsk/jvmti/FieldAccess/fieldacc001a;", "instanceDouble", "D", JNI_FALSE }, |
| { NULL, "Lnsk/jvmti/FieldAccess/fieldacc001a;", "run", "()I", 96, |
| "Lnsk/jvmti/FieldAccess/fieldacc001a;", "staticChar", "C", JNI_TRUE }, |
| { NULL, "Lnsk/jvmti/FieldAccess/fieldacc001a;", "run", "()I", 100, |
| "Lnsk/jvmti/FieldAccess/fieldacc001a;", "instanceChar", "C", JNI_FALSE }, |
| { NULL, "Lnsk/jvmti/FieldAccess/fieldacc001a;", "run", "()I", 109, |
| "Lnsk/jvmti/FieldAccess/fieldacc001a;", "staticObject", "Ljava/lang/Object;", JNI_TRUE }, |
| { NULL, "Lnsk/jvmti/FieldAccess/fieldacc001a;", "run", "()I", 113, |
| "Lnsk/jvmti/FieldAccess/fieldacc001a;", "instanceObject", "Ljava/lang/Object;", JNI_FALSE }, |
| { NULL, "Lnsk/jvmti/FieldAccess/fieldacc001a;", "run", "()I", 122, |
| "Lnsk/jvmti/FieldAccess/fieldacc001a;", "staticArrInt", "[I", JNI_TRUE }, |
| { NULL, "Lnsk/jvmti/FieldAccess/fieldacc001a;", "run", "()I", 128, |
| "Lnsk/jvmti/FieldAccess/fieldacc001a;", "instanceArrInt", "[I", JNI_FALSE } |
| }; |
| |
| |
| void JNICALL FieldAccess(jvmtiEnv *jvmti_env, JNIEnv *env, |
| jthread thr, jmethodID method, |
| jlocation location, jclass field_klass, jobject obj, jfieldID field) { |
| jvmtiError err; |
| jclass cls; |
| watch_info watch; |
| char *generic; |
| size_t i; |
| |
| eventsCount++; |
| if (printdump == JNI_TRUE) { |
| printf(">>> retrieving access watch info ...\n"); |
| } |
| watch.fid = field; |
| watch.loc = location; |
| watch.is_static = (obj == NULL) ? JNI_TRUE : JNI_FALSE; |
| err = (*jvmti_env)->GetMethodDeclaringClass(jvmti_env, method, &cls); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("(GetMethodDeclaringClass) unexpected error: %s (%d)\n", |
| TranslateError(err), err); |
| result = STATUS_FAILED; |
| } |
| err = (*jvmti_env)->GetClassSignature(jvmti_env, cls, |
| &watch.m_cls, &generic); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("(GetClassSignature) unexpected error: %s (%d)\n", |
| TranslateError(err), err); |
| result = STATUS_FAILED; |
| } |
| err = (*jvmti_env)->GetMethodName(jvmti_env, method, |
| &watch.m_name, &watch.m_sig, &generic); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("(GetMethodName) unexpected error: %s (%d)\n", |
| TranslateError(err), err); |
| result = STATUS_FAILED; |
| } |
| err = (*jvmti_env)->GetClassSignature(jvmti_env, field_klass, |
| &watch.f_cls, &generic); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("(GetClassSignature) unexpected error: %s (%d)\n", |
| TranslateError(err), err); |
| result = STATUS_FAILED; |
| } |
| err = (*jvmti_env)->GetFieldName(jvmti_env, field_klass, field, |
| &watch.f_name, &watch.f_sig, &generic); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("(GetFieldName) unexpected error: %s (%d)\n", |
| TranslateError(err), err); |
| result = STATUS_FAILED; |
| } |
| if (printdump == JNI_TRUE) { |
| printf(">>> class: \"%s\"\n", watch.m_cls); |
| printf(">>> method: \"%s%s\"\n", watch.m_name, watch.m_sig); |
| printf(">>> location: 0x%x%08x\n", |
| (jint)(watch.loc >> 32), (jint)watch.loc); |
| printf(">>> field cls: \"%s\"\n", watch.f_cls); |
| printf(">>> field: \"%s:%s\"\n", watch.f_name, watch.f_sig); |
| printf(">>> object: 0x%p\n", obj); |
| printf(">>> ... done\n"); |
| } |
| for (i = 0; i < sizeof(watches)/sizeof(watch_info); i++) { |
| if (watch.fid == watches[i].fid) { |
| if (watch.m_cls == NULL || |
| strcmp(watch.m_cls, watches[i].m_cls) != 0) { |
| printf("(watch#%" PRIuPTR ") wrong class: \"%s\", expected: \"%s\"\n", |
| i, watch.m_cls, watches[i].m_cls); |
| result = STATUS_FAILED; |
| } |
| if (watch.m_name == NULL || |
| strcmp(watch.m_name, watches[i].m_name) != 0) { |
| printf("(watch#%" PRIuPTR ") wrong method name: \"%s\"", |
| i, watch.m_name); |
| printf(", expected: \"%s\"\n", watches[i].m_name); |
| result = STATUS_FAILED; |
| } |
| if (watch.m_sig == NULL || |
| strcmp(watch.m_sig, watches[i].m_sig) != 0) { |
| printf("(watch#%" PRIuPTR ") wrong method sig: \"%s\"", |
| i, watch.m_sig); |
| printf(", expected: \"%s\"\n", watches[i].m_sig); |
| result = STATUS_FAILED; |
| } |
| if (watch.loc != watches[i].loc) { |
| printf("(watch#%" PRIuPTR ") wrong location: 0x%x%08x", |
| i, (jint)(watch.loc >> 32), (jint)watch.loc); |
| printf(", expected: 0x%x%08x\n", |
| (jint)(watches[i].loc >> 32), (jint)watches[i].loc); |
| result = STATUS_FAILED; |
| } |
| if (watch.f_name == NULL || |
| strcmp(watch.f_name, watches[i].f_name) != 0) { |
| printf("(watch#%" PRIuPTR ") wrong field name: \"%s\"", |
| i, watch.f_name); |
| printf(", expected: \"%s\"\n", watches[i].f_name); |
| result = STATUS_FAILED; |
| } |
| if (watch.f_sig == NULL || |
| strcmp(watch.f_sig, watches[i].f_sig) != 0) { |
| printf("(watch#%" PRIuPTR ") wrong field sig: \"%s\"", |
| i, watch.f_sig); |
| printf(", expected: \"%s\"\n", watches[i].f_sig); |
| result = STATUS_FAILED; |
| } |
| if (watch.is_static != watches[i].is_static) { |
| printf("(watch#%" PRIuPTR ") wrong field type: %s", i, |
| (watch.is_static==JNI_TRUE)?"static":"instance"); |
| printf(", expected: %s\n", |
| (watches[i].is_static==JNI_TRUE)?"static":"instance"); |
| result = STATUS_FAILED; |
| } |
| return; |
| } |
| } |
| printf("Unexpected field access catched: 0x%p\n", watch.fid); |
| result = STATUS_FAILED; |
| } |
| |
| #ifdef STATIC_BUILD |
| JNIEXPORT jint JNICALL Agent_OnLoad_fieldacc001(JavaVM *jvm, char *options, void *reserved) { |
| return Agent_Initialize(jvm, options, reserved); |
| } |
| JNIEXPORT jint JNICALL Agent_OnAttach_fieldacc001(JavaVM *jvm, char *options, void *reserved) { |
| return Agent_Initialize(jvm, options, reserved); |
| } |
| JNIEXPORT jint JNI_OnLoad_fieldacc001(JavaVM *jvm, char *options, void *reserved) { |
| return JNI_VERSION_1_8; |
| } |
| #endif |
| jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) { |
| jvmtiError err; |
| jint res; |
| |
| 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_access_events) { |
| callbacks.FieldAccess = &FieldAccess; |
| 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; |
| } |
| |
| err = (*jvmti)->SetEventNotificationMode(jvmti, JVMTI_ENABLE, |
| JVMTI_EVENT_FIELD_ACCESS, NULL); |
| if (err != JVMTI_ERROR_NONE) { |
| printf("Failed to enable JVMTI_EVENT_FIELD_ACCESS: %s (%d)\n", |
| TranslateError(err), err); |
| return JNI_ERR; |
| } |
| } else { |
| printf("Warning: FieldAccess watch is not implemented\n"); |
| } |
| |
| return JNI_OK; |
| } |
| |
| |
| JNIEXPORT void JNICALL |
| Java_nsk_jvmti_FieldAccess_fieldacc001_getReady(JNIEnv *env, jclass klass) { |
| jvmtiError err; |
| jclass cls; |
| size_t i; |
| |
| if (!caps.can_generate_field_access_events) { |
| return; |
| } |
| |
| if (printdump == JNI_TRUE) { |
| printf(">>> setting field access watches ...\n"); |
| } |
| cls = JNI_ENV_PTR(env)->FindClass(JNI_ENV_ARG(env, |
| "nsk/jvmti/FieldAccess/fieldacc001a")); |
| if (cls == NULL) { |
| printf("Cannot find fieldacc001a class!\n"); |
| result = STATUS_FAILED; |
| return; |
| } |
| 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); |
| } |
| if (watches[i].fid == NULL) { |
| printf("Cannot find field \"%s\"!\n", watches[i].f_name); |
| result = STATUS_FAILED; |
| return; |
| } |
| err = (*jvmti)->SetFieldAccessWatch(jvmti, cls, watches[i].fid); |
| if (err == JVMTI_ERROR_NONE) { |
| eventsExpected++; |
| } else { |
| printf("(SetFieldAccessWatch#%" PRIuPTR ") unexpected error: %s (%d)\n", |
| i, TranslateError(err), err); |
| result = STATUS_FAILED; |
| } |
| } |
| if (printdump == JNI_TRUE) { |
| printf(">>> ... done\n"); |
| } |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_nsk_jvmti_FieldAccess_fieldacc001_check(JNIEnv *env, jclass cls) { |
| if (eventsCount != eventsExpected) { |
| printf("Wrong number of field access events: %d, expected: %d\n", |
| eventsCount, eventsExpected); |
| result = STATUS_FAILED; |
| } |
| return result; |
| } |
| |
| #ifdef __cplusplus |
| } |
| #endif |
