361 lines
14 KiB
C++
361 lines
14 KiB
C++
/*
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* Copyright (c) 2003, 2020, 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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jfieldID fid;
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char *m_cls;
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char *m_name;
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char *m_sig;
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jlocation loc;
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char *f_cls;
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char *f_name;
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char *f_sig;
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jboolean is_static;
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} writable_watch_info;
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typedef struct {
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jfieldID fid;
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const char *m_cls;
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const char *m_name;
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const char *m_sig;
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jlocation loc;
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const char *f_cls;
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const char *f_name;
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const char *f_sig;
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jboolean is_static;
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} watch_info;
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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 int eventsExpected = 0;
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static int eventsCount = 0;
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static watch_info watches[] = {
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{ NULL, "Lnsk/jvmti/FieldAccess/fieldacc001a;", "run", "()I", 2,
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"Lnsk/jvmti/FieldAccess/fieldacc001a;", "staticBoolean", "Z", JNI_TRUE },
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{ NULL, "Lnsk/jvmti/FieldAccess/fieldacc001a;", "run", "()I", 6,
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"Lnsk/jvmti/FieldAccess/fieldacc001a;", "instanceBoolean", "Z", JNI_FALSE },
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{ NULL, "Lnsk/jvmti/FieldAccess/fieldacc001a;", "run", "()I", 15,
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"Lnsk/jvmti/FieldAccess/fieldacc001a;", "staticByte", "B", JNI_TRUE },
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{ NULL, "Lnsk/jvmti/FieldAccess/fieldacc001a;", "run", "()I", 19,
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"Lnsk/jvmti/FieldAccess/fieldacc001a;", "instanceByte", "B", JNI_FALSE },
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{ NULL, "Lnsk/jvmti/FieldAccess/fieldacc001a;", "run", "()I", 28,
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"Lnsk/jvmti/FieldAccess/fieldacc001a;", "staticShort", "S", JNI_TRUE },
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{ NULL, "Lnsk/jvmti/FieldAccess/fieldacc001a;", "run", "()I", 32,
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"Lnsk/jvmti/FieldAccess/fieldacc001a;", "instanceShort", "S", JNI_FALSE },
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{ NULL, "Lnsk/jvmti/FieldAccess/fieldacc001a;", "run", "()I", 41,
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"Lnsk/jvmti/FieldAccess/fieldacc001a;", "staticInt", "I", JNI_TRUE },
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{ NULL, "Lnsk/jvmti/FieldAccess/fieldacc001a;", "run", "()I", 45,
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"Lnsk/jvmti/FieldAccess/fieldacc001a;", "instanceInt", "I", JNI_FALSE },
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{ NULL, "Lnsk/jvmti/FieldAccess/fieldacc001a;", "run", "()I", 54,
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"Lnsk/jvmti/FieldAccess/fieldacc001a;", "staticLong", "J", JNI_TRUE },
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{ NULL, "Lnsk/jvmti/FieldAccess/fieldacc001a;", "run", "()I", 58,
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"Lnsk/jvmti/FieldAccess/fieldacc001a;", "instanceLong", "J", JNI_FALSE },
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{ NULL, "Lnsk/jvmti/FieldAccess/fieldacc001a;", "run", "()I", 68,
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"Lnsk/jvmti/FieldAccess/fieldacc001a;", "staticFloat", "F", JNI_TRUE },
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{ NULL, "Lnsk/jvmti/FieldAccess/fieldacc001a;", "run", "()I", 72,
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"Lnsk/jvmti/FieldAccess/fieldacc001a;", "instanceFloat", "F", JNI_FALSE },
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{ NULL, "Lnsk/jvmti/FieldAccess/fieldacc001a;", "run", "()I", 82,
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"Lnsk/jvmti/FieldAccess/fieldacc001a;", "staticDouble", "D", JNI_TRUE },
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{ NULL, "Lnsk/jvmti/FieldAccess/fieldacc001a;", "run", "()I", 86,
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"Lnsk/jvmti/FieldAccess/fieldacc001a;", "instanceDouble", "D", JNI_FALSE },
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{ NULL, "Lnsk/jvmti/FieldAccess/fieldacc001a;", "run", "()I", 96,
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"Lnsk/jvmti/FieldAccess/fieldacc001a;", "staticChar", "C", JNI_TRUE },
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{ NULL, "Lnsk/jvmti/FieldAccess/fieldacc001a;", "run", "()I", 100,
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"Lnsk/jvmti/FieldAccess/fieldacc001a;", "instanceChar", "C", JNI_FALSE },
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{ NULL, "Lnsk/jvmti/FieldAccess/fieldacc001a;", "run", "()I", 109,
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"Lnsk/jvmti/FieldAccess/fieldacc001a;", "staticObject", "Ljava/lang/Object;", JNI_TRUE },
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{ NULL, "Lnsk/jvmti/FieldAccess/fieldacc001a;", "run", "()I", 113,
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"Lnsk/jvmti/FieldAccess/fieldacc001a;", "instanceObject", "Ljava/lang/Object;", JNI_FALSE },
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{ NULL, "Lnsk/jvmti/FieldAccess/fieldacc001a;", "run", "()I", 122,
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"Lnsk/jvmti/FieldAccess/fieldacc001a;", "staticArrInt", "[I", JNI_TRUE },
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{ NULL, "Lnsk/jvmti/FieldAccess/fieldacc001a;", "run", "()I", 128,
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"Lnsk/jvmti/FieldAccess/fieldacc001a;", "instanceArrInt", "[I", JNI_FALSE }
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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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jvmtiError err;
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jclass cls;
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writable_watch_info watch;
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char *generic;
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size_t i;
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eventsCount++;
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if (printdump == JNI_TRUE) {
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printf(">>> retrieving access watch info ...\n");
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}
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watch.fid = field;
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watch.loc = location;
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watch.is_static = (obj == NULL) ? JNI_TRUE : JNI_FALSE;
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err = jvmti_env->GetMethodDeclaringClass(method, &cls);
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if (err != JVMTI_ERROR_NONE) {
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printf("(GetMethodDeclaringClass) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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result = STATUS_FAILED;
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return;
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}
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err = jvmti_env->GetClassSignature(cls,
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&watch.m_cls, &generic);
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if (err != JVMTI_ERROR_NONE) {
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printf("(GetClassSignature) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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result = STATUS_FAILED;
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return;
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}
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err = jvmti_env->GetMethodName(method,
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&watch.m_name, &watch.m_sig, &generic);
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if (err != JVMTI_ERROR_NONE) {
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printf("(GetMethodName) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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result = STATUS_FAILED;
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return;
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}
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err = jvmti_env->GetClassSignature(field_klass,
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&watch.f_cls, &generic);
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if (err != JVMTI_ERROR_NONE) {
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printf("(GetClassSignature) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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result = STATUS_FAILED;
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return;
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}
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err = jvmti_env->GetFieldName(field_klass, field,
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&watch.f_name, &watch.f_sig, &generic);
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if (err != JVMTI_ERROR_NONE) {
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printf("(GetFieldName) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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result = STATUS_FAILED;
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return;
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}
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if (printdump == JNI_TRUE) {
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printf(">>> class: \"%s\"\n", watch.m_cls);
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printf(">>> method: \"%s%s\"\n", watch.m_name, watch.m_sig);
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printf(">>> location: 0x%x%08x\n",
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(jint)(watch.loc >> 32), (jint)watch.loc);
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printf(">>> field cls: \"%s\"\n", watch.f_cls);
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printf(">>> field: \"%s:%s\"\n", watch.f_name, watch.f_sig);
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printf(">>> object: 0x%p\n", obj);
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printf(">>> ... done\n");
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}
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for (i = 0; i < sizeof(watches)/sizeof(watch_info); i++) {
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if (watch.fid == watches[i].fid) {
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if (watch.m_cls == NULL ||
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strcmp(watch.m_cls, watches[i].m_cls) != 0) {
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printf("(watch#%" PRIuPTR ") wrong class: \"%s\", expected: \"%s\"\n",
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i, watch.m_cls, watches[i].m_cls);
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result = STATUS_FAILED;
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}
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if (watch.m_name == NULL ||
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strcmp(watch.m_name, watches[i].m_name) != 0) {
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printf("(watch#%" PRIuPTR ") wrong method name: \"%s\"",
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i, watch.m_name);
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printf(", expected: \"%s\"\n", watches[i].m_name);
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result = STATUS_FAILED;
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}
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if (watch.m_sig == NULL ||
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strcmp(watch.m_sig, watches[i].m_sig) != 0) {
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printf("(watch#%" PRIuPTR ") wrong method sig: \"%s\"",
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i, watch.m_sig);
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printf(", expected: \"%s\"\n", watches[i].m_sig);
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result = STATUS_FAILED;
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}
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if (watch.loc != watches[i].loc) {
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printf("(watch#%" PRIuPTR ") wrong location: 0x%x%08x",
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i, (jint)(watch.loc >> 32), (jint)watch.loc);
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printf(", expected: 0x%x%08x\n",
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(jint)(watches[i].loc >> 32), (jint)watches[i].loc);
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result = STATUS_FAILED;
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}
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if (watch.f_name == NULL ||
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strcmp(watch.f_name, watches[i].f_name) != 0) {
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printf("(watch#%" PRIuPTR ") wrong field name: \"%s\"",
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i, watch.f_name);
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printf(", expected: \"%s\"\n", watches[i].f_name);
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result = STATUS_FAILED;
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}
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if (watch.f_sig == NULL ||
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strcmp(watch.f_sig, watches[i].f_sig) != 0) {
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printf("(watch#%" PRIuPTR ") wrong field sig: \"%s\"",
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i, watch.f_sig);
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printf(", expected: \"%s\"\n", watches[i].f_sig);
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result = STATUS_FAILED;
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}
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if (watch.is_static != watches[i].is_static) {
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printf("(watch#%" PRIuPTR ") wrong field type: %s", i,
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(watch.is_static == JNI_TRUE) ? "static" : "instance");
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printf(", expected: %s\n",
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(watches[i].is_static == JNI_TRUE) ? "static" : "instance");
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result = STATUS_FAILED;
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}
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return;
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}
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}
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printf("Unexpected field access catched: 0x%p\n", watch.fid);
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result = STATUS_FAILED;
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}
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#ifdef STATIC_BUILD
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JNIEXPORT jint JNICALL Agent_OnLoad_fieldacc001(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_fieldacc001(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_fieldacc001(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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jvmtiError err;
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jint res;
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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->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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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("Failed to enable JVMTI_EVENT_FIELD_ACCESS: %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_FieldAccess_fieldacc001_getReady(JNIEnv *env, jclass klass) {
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jvmtiError err;
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jclass cls;
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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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if (printdump == JNI_TRUE) {
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printf(">>> setting field access watches ...\n");
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}
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cls = env->FindClass("nsk/jvmti/FieldAccess/fieldacc001a");
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if (cls == NULL) {
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printf("Cannot find fieldacc001a class!\n");
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result = STATUS_FAILED;
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return;
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}
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for (i = 0; i < sizeof(watches)/sizeof(watch_info); i++) {
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if (watches[i].is_static == JNI_TRUE) {
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watches[i].fid = env->GetStaticFieldID(
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cls, watches[i].f_name, watches[i].f_sig);
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} else {
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watches[i].fid = env->GetFieldID(
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cls, watches[i].f_name, watches[i].f_sig);
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}
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if (watches[i].fid == NULL) {
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printf("Cannot find field \"%s\"!\n", watches[i].f_name);
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result = STATUS_FAILED;
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return;
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}
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err = jvmti->SetFieldAccessWatch(cls, watches[i].fid);
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if (err == JVMTI_ERROR_NONE) {
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eventsExpected++;
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} else {
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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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if (printdump == JNI_TRUE) {
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printf(">>> ... done\n");
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}
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}
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JNIEXPORT jint JNICALL
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Java_nsk_jvmti_FieldAccess_fieldacc001_check(JNIEnv *env, jclass cls) {
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if (eventsCount != eventsExpected) {
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printf("Wrong number of field access events: %d, expected: %d\n",
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eventsCount, eventsExpected);
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result = STATUS_FAILED;
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}
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return result;
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}
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}
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