441 lines
14 KiB
C++
441 lines
14 KiB
C++
/*
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* Copyright (c) 2003, 2024, 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 "jvmti_common.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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jvalue val;
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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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const jboolean is_static;
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jvalue val;
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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 volatile jboolean isVirtualExpected = 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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{ nullptr, "Lfieldmod01a;", "run", "()V", 1,
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"Lfieldmod01a;", "staticBoolean", "Z", JNI_TRUE, {} },
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{ nullptr, "Lfieldmod01a;", "run", "()V", 5,
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"Lfieldmod01a;", "staticByte", "B", JNI_TRUE, {} },
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{ nullptr, "Lfieldmod01a;", "run", "()V", 9,
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"Lfieldmod01a;", "staticShort", "S", JNI_TRUE, {} },
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{ nullptr, "Lfieldmod01a;", "run", "()V", 13,
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"Lfieldmod01a;", "staticInt", "I", JNI_TRUE, {} },
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{ nullptr, "Lfieldmod01a;", "run", "()V", 19,
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"Lfieldmod01a;", "staticLong", "J", JNI_TRUE, {} },
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{ nullptr, "Lfieldmod01a;", "run", "()V", 24,
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"Lfieldmod01a;", "staticFloat", "F", JNI_TRUE, {} },
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{ nullptr, "Lfieldmod01a;", "run", "()V", 30,
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"Lfieldmod01a;", "staticDouble", "D", JNI_TRUE, {} },
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{ nullptr, "Lfieldmod01a;", "run", "()V", 35,
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"Lfieldmod01a;", "staticChar", "C", JNI_TRUE, {} },
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{ nullptr, "Lfieldmod01a;", "run", "()V", 41,
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"Lfieldmod01a;", "staticObject", "Ljava/lang/Object;", JNI_TRUE, {} },
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{ nullptr, "Lfieldmod01a;", "run", "()V", 47,
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"Lfieldmod01a;", "staticArrInt", "[I", JNI_TRUE, {} },
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{ nullptr, "Lfieldmod01a;", "run", "()V", 52,
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"Lfieldmod01a;", "instanceBoolean", "Z", JNI_FALSE, {} },
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{ nullptr, "Lfieldmod01a;", "run", "()V", 58,
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"Lfieldmod01a;", "instanceByte", "B", JNI_FALSE, {} },
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{ nullptr, "Lfieldmod01a;", "run", "()V", 64,
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"Lfieldmod01a;", "instanceShort", "S", JNI_FALSE, {} },
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{ nullptr, "Lfieldmod01a;", "run", "()V", 70,
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"Lfieldmod01a;", "instanceInt", "I", JNI_FALSE, {} },
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{ nullptr, "Lfieldmod01a;", "run", "()V", 77,
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"Lfieldmod01a;", "instanceLong", "J", JNI_FALSE, {} },
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{ nullptr, "Lfieldmod01a;", "run", "()V", 83,
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"Lfieldmod01a;", "instanceFloat", "F", JNI_FALSE, {} },
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{ nullptr, "Lfieldmod01a;", "run", "()V", 90,
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"Lfieldmod01a;", "instanceDouble", "D", JNI_FALSE, {} },
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{ nullptr, "Lfieldmod01a;", "run", "()V", 96,
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"Lfieldmod01a;", "instanceChar", "C", JNI_FALSE, {} },
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{ nullptr, "Lfieldmod01a;", "run", "()V", 103,
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"Lfieldmod01a;", "instanceObject", "Ljava/lang/Object;", JNI_FALSE, {} },
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{ nullptr, "Lfieldmod01a;", "run", "()V", 110,
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"Lfieldmod01a;", "instanceArrInt", "[I", JNI_FALSE, {} }
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};
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void printValue(jvalue val, char *sig) {
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switch (*sig) {
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case 'J':
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LOG("0x%x%08x", (jint)(val.j >> 32), (jint)val.j);
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break;
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case 'F':
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LOG("%.3f", (double)val.f);
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break;
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case 'D':
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LOG("%f", (double)val.d);
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break;
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case 'L':
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case '[':
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LOG("0x%p", val.l);
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break;
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case 'Z':
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LOG("0x%x", val.z);
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break;
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case 'B':
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LOG("%d", val.b);
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break;
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case 'S':
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LOG("%d", val.s);
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break;
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case 'C':
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LOG("0x%x", val.c);
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break;
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case 'I':
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LOG("%d", val.i);
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break;
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default:
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LOG("0x%x%08x", (jint)(val.j >> 32), (jint)val.j);
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break;
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}
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}
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int isEqual(JNIEnv *jni, char *sig, jvalue v1, jvalue v2) {
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switch (*sig) {
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case 'J':
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return (v1.j == v2.j);
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case 'F':
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return (v1.f == v2.f);
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case 'D':
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return (v1.d == v2.d);
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case 'L':
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case '[':
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return jni->IsSameObject(v1.l, v2.l);
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case 'Z':
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return (v1.z == v2.z);
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case 'B':
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return (v1.b == v2.b);
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case 'S':
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return (v1.s == v2.s);
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case 'C':
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return (v1.c == v2.c);
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case 'I':
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return (v1.i == v2.i);
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default:
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return (1);
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}
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}
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void JNICALL FieldModification(jvmtiEnv *jvmti, JNIEnv *jni,
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jthread thr, jmethodID method, jlocation location,
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jclass field_klass, jobject obj,
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jfieldID field, char sig, jvalue new_value) {
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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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eventsCount++;
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LOG(">>> retrieving modification watch info ...\n");
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watch.fid = field;
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watch.loc = location;
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watch.val = new_value;
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watch.is_static = (obj == nullptr) ? JNI_TRUE : JNI_FALSE;
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err = jvmti->GetMethodDeclaringClass(method, &cls);
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if (err != JVMTI_ERROR_NONE) {
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LOG("(GetMethodDeclaringClass) unexpected error: %s (%d)\n", 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->GetClassSignature(cls, &watch.m_cls, &generic);
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if (err != JVMTI_ERROR_NONE) {
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LOG("(GetClassSignature) unexpected error: %s (%d)\n", 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->GetMethodName(method, &watch.m_name, &watch.m_sig, &generic);
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if (err != JVMTI_ERROR_NONE) {
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LOG("(GetMethodName) unexpected error: %s (%d)\n", 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->GetClassSignature(field_klass, &watch.f_cls, &generic);
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if (err != JVMTI_ERROR_NONE) {
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LOG("(GetClassSignature) unexpected error: %s (%d)\n", 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->GetFieldName(field_klass, field, &watch.f_name, &watch.f_sig, &generic);
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if (err != JVMTI_ERROR_NONE) {
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LOG("(GetFieldName) unexpected error: %s (%d)\n", TranslateError(err), err);
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result = STATUS_FAILED;
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return;
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}
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LOG(">>> class: \"%s\"\n", watch.m_cls);
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LOG(">>> method: \"%s%s\"\n", watch.m_name, watch.m_sig);
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LOG(">>> location: 0x%x%08x\n", (jint)(watch.loc >> 32), (jint)watch.loc);
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LOG(">>> field cls: \"%s\"\n", watch.f_cls);
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LOG(">>> field: \"%s:%s\"\n", watch.f_name, watch.f_sig);
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LOG(">>> object: 0x%p\n", obj);
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LOG(">>> new value: ");
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printValue(watch.val, watch.f_sig);
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LOG("\n");
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for (size_t 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 == nullptr || strcmp(watch.m_cls, watches[i].m_cls) != 0) {
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LOG("(watch#%" PRIuPTR ") wrong class: \"%s\", expected: \"%s\"\n", 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 == nullptr || strcmp(watch.m_name, watches[i].m_name) != 0) {
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LOG("(watch#%" PRIuPTR ") wrong method name: \"%s\"", i, watch.m_name);
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LOG(", 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 == nullptr || strcmp(watch.m_sig, watches[i].m_sig) != 0) {
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LOG("(watch#%" PRIuPTR ") wrong method sig: \"%s\"", i, watch.m_sig);
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LOG(", 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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LOG("(watch#%" PRIuPTR ") wrong location: 0x%x%08x", i, (jint)(watch.loc >> 32), (jint)watch.loc);
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LOG(", expected: 0x%x%08x\n", (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 == nullptr || strcmp(watch.f_name, watches[i].f_name) != 0) {
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LOG("(watch#%" PRIuPTR ") wrong field name: \"%s\"", i, watch.f_name);
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LOG(", 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 == nullptr || strcmp(watch.f_sig, watches[i].f_sig) != 0) {
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LOG("(watch#%" PRIuPTR ") wrong field sig: \"%s\"", i, watch.f_sig);
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LOG(", 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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LOG("(watch#%" PRIuPTR ") wrong field type: %s", i, (watch.is_static == JNI_TRUE) ? "static" : "instance");
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LOG(", expected: %s\n", (watches[i].is_static == JNI_TRUE) ? "static" : "instance");
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result = STATUS_FAILED;
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}
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if (!isEqual((JNIEnv *)jni, watch.f_sig, watch.val, watches[i].val)) {
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LOG("(watch#%" PRIuPTR ") wrong new value: ", i);
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printValue(watch.val, watch.f_sig);
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LOG(", expected: ");
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printValue(watches[i].val, watch.f_sig);
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LOG("\n");
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result = STATUS_FAILED;
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}
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jboolean isVirtual = jni->IsVirtualThread(thr);
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if (isVirtualExpected != isVirtual) {
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LOG("The thread IsVirtualThread %d differs from expected %d.\n", isVirtual, isVirtualExpected);
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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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LOG("Unexpected field modification catched: 0x%p\n", watch.fid);
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result = STATUS_FAILED;
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}
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jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) {
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jvmtiCapabilities caps;
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jvmtiError err;
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jint res;
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res = jvm->GetEnv((void **) &jvmti, JVMTI_VERSION_1_1);
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if (res != JNI_OK || jvmti == nullptr) {
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LOG("Wrong result of a valid call to GetEnv!\n");
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return JNI_ERR;
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}
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memset(&caps, 0, sizeof(jvmtiCapabilities));
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caps.can_generate_field_modification_events = 1;
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caps.can_support_virtual_threads = 1;
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err = jvmti->AddCapabilities(&caps);
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if (err != JVMTI_ERROR_NONE) {
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LOG("(AddCapabilities) unexpected error: %s (%d)\n", 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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LOG("(GetCapabilities) unexpected error: %s (%d)\n", TranslateError(err), err);
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return JNI_ERR;
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}
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if (caps.can_generate_field_modification_events) {
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callbacks.FieldModification = &FieldModification;
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err = jvmti->SetEventCallbacks(&callbacks, sizeof(callbacks));
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if (err != JVMTI_ERROR_NONE) {
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LOG("(SetEventCallbacks) unexpected error: %s (%d)\n", TranslateError(err), err);
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return JNI_ERR;
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}
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err = jvmti->SetEventNotificationMode(JVMTI_ENABLE, JVMTI_EVENT_FIELD_MODIFICATION, nullptr);
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if (err != JVMTI_ERROR_NONE) {
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LOG("Failed to enable JVMTI_EVENT_FIELD_MODIFICATION: %s (%d)\n", TranslateError(err), err);
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return JNI_ERR;
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}
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} else {
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LOG("Warning: FieldModification 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_fieldmod01_getReady(JNIEnv *jni, jclass klass, jobject obj1, jobject obj2, jobject arr1, jobject arr2) {
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jvmtiError err;
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jclass cls;
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jthread thread;
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err = jvmti->GetCurrentThread(&thread);
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if (err != JVMTI_ERROR_NONE) {
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LOG("Failed to get current thread: %s (%d)\n", TranslateError(err), err);
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result = STATUS_FAILED;
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return;
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}
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eventsCount = 0;
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eventsExpected = 0;
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isVirtualExpected = jni->IsVirtualThread(thread);
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LOG(">>> setting field modification watches ...\n");
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cls = jni->FindClass("fieldmod01a");
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if (cls == nullptr) {
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LOG("Cannot find fieldmod01a class!\n");
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result = STATUS_FAILED;
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return;
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}
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for (size_t 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 = jni->GetStaticFieldID(cls, watches[i].f_name, watches[i].f_sig);
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} else {
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watches[i].fid = jni->GetFieldID(cls, watches[i].f_name, watches[i].f_sig);
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}
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if (watches[i].fid == nullptr) {
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LOG("Cannot get field ID for \"%s:%s\"\n", watches[i].f_name, watches[i].f_sig);
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result = STATUS_FAILED;
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return;
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}
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err = jvmti->SetFieldModificationWatch(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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LOG("(SetFieldModificationWatch#%" PRIuPTR ") unexpected error: %s (%d)\n", i, TranslateError(err), err);
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result = STATUS_FAILED;
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}
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}
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watches[0].val.z = JNI_TRUE;
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watches[1].val.b = 1;
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watches[2].val.s = 2;
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watches[3].val.i = 3;
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watches[4].val.j = 4;
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watches[5].val.f = 0.5F;
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watches[6].val.d = 0.6;
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watches[7].val.c = 0x61;
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watches[8].val.l = jni->NewGlobalRef(obj1);
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watches[9].val.l = jni->NewGlobalRef(arr1);
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watches[10].val.z = JNI_FALSE;
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watches[11].val.b = 10;
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watches[12].val.s = 20;
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watches[13].val.i = 30;
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watches[14].val.j = 40;
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watches[15].val.f = 0.05F;
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watches[16].val.d = 0.06;
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watches[17].val.c = 0x7a;
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watches[18].val.l = jni->NewGlobalRef(obj2);
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watches[19].val.l = jni->NewGlobalRef(arr2);
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LOG(">>> ... done\n");
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}
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JNIEXPORT jint JNICALL
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Java_fieldmod01_check(JNIEnv *jni, jclass clz) {
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if (eventsCount != eventsExpected) {
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LOG("Wrong number of field modification events: %d, expected: %d\n", eventsCount, eventsExpected);
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result = STATUS_FAILED;
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}
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jclass cls = jni->FindClass("fieldmod01a");
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if (cls == nullptr) {
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LOG("Cannot find fieldmod01a class!\n");
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result = STATUS_FAILED;
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return result;
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}
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for (size_t i = 0; i < sizeof(watches)/sizeof(watch_info); i++) {
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jvmtiError err = jvmti->ClearFieldModificationWatch(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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LOG("(ClearFieldModificationWatch#%" PRIuPTR ") unexpected error: %s (%d)\n", i, TranslateError(err), err);
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result = STATUS_FAILED;
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}
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}
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return result;
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}
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JNIEXPORT jint JNICALL Agent_OnLoad(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(JavaVM *jvm, char *options, void *reserved) {
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|
return Agent_Initialize(jvm, options, reserved);
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|
}
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|
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}
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