207 lines
6.9 KiB
C++
207 lines
6.9 KiB
C++
/*
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* Copyright (c) 2003, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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#include <stdio.h>
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#include <string.h>
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#include <inttypes.h>
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#include "jvmti.h"
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#include "agent_common.h"
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#include "JVMTITools.h"
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extern "C" {
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#define PASSED 0
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#define STATUS_FAILED 2
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typedef struct {
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const char *name;
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const char *sig;
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const jboolean stat;
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jfieldID fid;
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const char *descr;
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} field;
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static jvmtiEnv *jvmti;
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static jvmtiEventCallbacks callbacks;
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static jvmtiCapabilities caps;
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static jint result = PASSED;
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static jboolean printdump = JNI_FALSE;
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static jfieldID actual_fid = NULL;
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static field fields[] = {
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{ "fld0", "J", JNI_TRUE, NULL, "static long" },
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{ "fld1", "J", JNI_FALSE, NULL, "long" },
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{ "fld2", "F", JNI_TRUE, NULL, "static float" },
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{ "fld3", "F", JNI_FALSE, NULL, "float" },
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{ "fld4", "D", JNI_TRUE, NULL, "static double" },
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{ "fld5", "D", JNI_FALSE, NULL, "double" },
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{ "fld6", "Ljava/lang/Object;", JNI_TRUE, NULL, "static Object" },
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{ "fld7", "Ljava/lang/Object;", JNI_FALSE, NULL, "Object" },
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{ "fld8", "Z", JNI_TRUE, NULL, "static boolean" },
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{ "fld9", "Z", JNI_FALSE, NULL, "boolean" },
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{ "fld10", "B", JNI_TRUE, NULL, "static byte" },
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{ "fld11", "B", JNI_FALSE, NULL, "byte" },
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{ "fld12", "S", JNI_TRUE, NULL, "static short" },
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{ "fld13", "S", JNI_FALSE, NULL, "short" },
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{ "fld14", "C", JNI_TRUE, NULL, "static char" },
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{ "fld15", "C", JNI_FALSE, NULL, "char" }
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};
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void JNICALL FieldAccess(jvmtiEnv *jvmti_env, JNIEnv *env,
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jthread thr, jmethodID method,
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jlocation location, jclass field_klass, jobject obj, jfieldID field) {
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if (printdump == JNI_TRUE) {
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printf(">>> FieldAccess, field: 0x%p\n", field);
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}
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actual_fid = field;
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}
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#ifdef STATIC_BUILD
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JNIEXPORT jint JNICALL Agent_OnLoad_setfldw005(JavaVM *jvm, char *options, void *reserved) {
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return Agent_Initialize(jvm, options, reserved);
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}
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JNIEXPORT jint JNICALL Agent_OnAttach_setfldw005(JavaVM *jvm, char *options, void *reserved) {
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return Agent_Initialize(jvm, options, reserved);
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}
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JNIEXPORT jint JNI_OnLoad_setfldw005(JavaVM *jvm, char *options, void *reserved) {
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return JNI_VERSION_1_8;
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}
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#endif
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jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) {
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jint res;
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jvmtiError err;
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if (options != NULL && strcmp(options, "printdump") == 0) {
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printdump = JNI_TRUE;
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}
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res = jvm->GetEnv((void **) &jvmti, JVMTI_VERSION_1_1);
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if (res != JNI_OK || jvmti == NULL) {
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printf("Wrong result of a valid call to GetEnv !\n");
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return JNI_ERR;
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}
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err = jvmti->GetCapabilities(&caps);
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if (err != JVMTI_ERROR_NONE) {
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printf("(GetCapabilities) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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return JNI_ERR;
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}
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err = jvmti->GetPotentialCapabilities(&caps);
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if (err != JVMTI_ERROR_NONE) {
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printf("(GetPotentialCapabilities) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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return JNI_ERR;
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}
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err = jvmti->AddCapabilities(&caps);
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if (err != JVMTI_ERROR_NONE) {
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printf("(AddCapabilities) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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return JNI_ERR;
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}
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err = jvmti->GetCapabilities(&caps);
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if (err != JVMTI_ERROR_NONE) {
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printf("(GetCapabilities) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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return JNI_ERR;
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}
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if (caps.can_generate_field_access_events) {
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callbacks.FieldAccess = &FieldAccess;
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err = jvmti->SetEventCallbacks(&callbacks, sizeof(callbacks));
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if (err != JVMTI_ERROR_NONE) {
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printf("(SetEventCallbacks) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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return JNI_ERR;
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}
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} else {
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printf("Warning: FieldAccess watch is not implemented\n");
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}
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return JNI_OK;
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}
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JNIEXPORT void JNICALL
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Java_nsk_jvmti_SetFieldAccessWatch_setfldw005_getReady(JNIEnv *env, jclass cls) {
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jvmtiError err;
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size_t i;
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if (!caps.can_generate_field_access_events) {
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return;
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}
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for (i = 0; i < sizeof(fields) / sizeof(field); i++) {
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if (fields[i].stat == JNI_TRUE) {
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fields[i].fid = env->GetStaticFieldID(cls, fields[i].name, fields[i].sig);
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} else {
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fields[i].fid = env->GetFieldID(cls, fields[i].name, fields[i].sig);
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}
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if (fields[i].fid == NULL) {
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printf("Unable to set access watch on %s fld%" PRIuPTR ", fieldID=0",
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fields[i].descr, i);
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} else {
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if (printdump == JNI_TRUE) {
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printf(">>> setting access watch on %s fld%" PRIuPTR ", fieldID=0x%p\n",
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fields[i].descr, i, fields[i].fid);
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}
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err = jvmti->SetFieldAccessWatch(cls, fields[i].fid);
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if (err != JVMTI_ERROR_NONE) {
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printf("(SetFieldAccessWatch#%" PRIuPTR ") unexpected error: %s (%d)\n",
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i, TranslateError(err), err);
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result = STATUS_FAILED;
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}
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}
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}
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err = jvmti->SetEventNotificationMode(JVMTI_ENABLE,
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JVMTI_EVENT_FIELD_ACCESS, NULL);
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if (err != JVMTI_ERROR_NONE) {
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printf("(SetEventNotificationMode) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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result = STATUS_FAILED;
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}
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}
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JNIEXPORT void JNICALL
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Java_nsk_jvmti_SetFieldAccessWatch_setfldw005_check(JNIEnv *env,
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jclass cls, jint ind) {
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if (printdump == JNI_TRUE) {
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printf(">>> checking on %s fld%d\n", fields[ind].descr, ind);
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}
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if (actual_fid != fields[ind].fid) {
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result = STATUS_FAILED;
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printf("Field %s fld%d: thrown field ID expected=0x%p, actual=0x%p\n",
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fields[ind].descr, ind, fields[ind].fid, actual_fid);
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}
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actual_fid = NULL;
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}
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JNIEXPORT jint JNICALL
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Java_nsk_jvmti_SetFieldAccessWatch_setfldw005_getRes(JNIEnv *env, jclass cls) {
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return result;
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}
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}
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