381 lines
13 KiB
C++
381 lines
13 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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const char *descr;
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jfieldID fid;
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jvalue val;
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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 char actual_sig = '\0';
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static jvalue actual_val = {};
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static field flds[] = {
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{ "fld0", "J", JNI_TRUE, "static long", NULL, {} },
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{ "fld1", "J", JNI_FALSE, "long", NULL, {} },
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{ "fld2", "F", JNI_TRUE, "static float", NULL, {} },
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{ "fld3", "F", JNI_FALSE, "float", NULL, {} },
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{ "fld4", "D", JNI_TRUE, "static double", NULL, {} },
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{ "fld5", "D", JNI_FALSE, "double", NULL, {} },
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{ "fld6", "Ljava/lang/Object;", JNI_TRUE, "static Object", NULL, {} },
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{ "fld7", "Ljava/lang/Object;", JNI_FALSE, "Object", NULL, {} },
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{ "fld8", "Z", JNI_TRUE, "static boolean", NULL, {} },
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{ "fld9", "Z", JNI_FALSE, "boolean", NULL, {} },
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{ "fld10", "B", JNI_TRUE, "static byte", NULL, {} },
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{ "fld11", "B", JNI_FALSE, "byte", NULL, {} },
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{ "fld12", "S", JNI_TRUE, "static short", NULL, {} },
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{ "fld13", "S", JNI_FALSE, "short", NULL, {} },
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{ "fld14", "C", JNI_TRUE, "static char", NULL, {} },
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{ "fld15", "C", JNI_FALSE, "char", NULL, {} }
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};
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void JNICALL FieldModification(jvmtiEnv *jvmti_env, JNIEnv *env,
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jthread thr, jmethodID method, jlocation location, jclass field_klass, jobject obj,
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jfieldID field, char sig, jvalue new_value) {
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actual_fid = field;
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actual_sig = sig;
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actual_val = new_value;
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if (actual_sig == 'L') {
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actual_val.l = env->NewGlobalRef(actual_val.l);
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}
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if (printdump == JNI_TRUE) {
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printf(">>> FieldModification, field: 0x%p", actual_fid);
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switch (actual_sig) {
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case 'J':
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printf(", sig: 'J', val: 0x%x%08x\n",
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(jint)(actual_val.j >> 32), (jint)actual_val.j);
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break;
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case 'F':
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printf(", sig: 'F', val: %.3f\n", (double)actual_val.f);
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break;
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case 'D':
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printf(", sig: 'D', val: %f\n", (double)actual_val.d);
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break;
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case 'L':
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printf(", sig: 'L', val: 0x%p\n", actual_val.l);
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break;
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case 'Z':
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printf(", sig: 'Z', val: 0x%x\n", actual_val.z);
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break;
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case 'B':
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printf(", sig: 'B', val: %d\n", actual_val.b);
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break;
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case 'S':
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printf(", sig: 'S', val: %d\n", actual_val.s);
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break;
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case 'C':
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printf(", sig: 'C', val: 0x%x\n", actual_val.c);
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break;
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case 'I':
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printf(", sig: 'I', val: %d\n", actual_val.i);
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break;
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default:
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printf(", sig: <unknown>, val: 0x%x%08x\n",
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(jint)(actual_val.j >> 32), (jint)actual_val.j);
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break;
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}
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}
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}
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#ifdef STATIC_BUILD
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JNIEXPORT jint JNICALL Agent_OnLoad_setfmodw005(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_setfmodw005(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_setfmodw005(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->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_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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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: 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_nsk_jvmti_SetFieldModificationWatch_setfmodw005_getReady(JNIEnv *env,
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jclass cls, jobject obj1, jobject obj2) {
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jvmtiError err;
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size_t i;
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if (!caps.can_generate_field_modification_events) {
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return;
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}
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#ifdef _MSC_VER
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flds[0].val.j = 0x1234567890abcdefi64;
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flds[1].val.j = 0xfedcba0987654321i64;
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#else
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flds[0].val.j = 0x1234567890abcdefULL;
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flds[1].val.j = 0xfedcba0987654321ULL;
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#endif
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flds[2].val.f = 123.456F;
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flds[3].val.f = 654.321F;
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flds[4].val.d = 123456.654321;
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flds[5].val.d = 654321.123456;
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flds[6].val.l = env->NewGlobalRef(obj1);
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flds[7].val.l = env->NewGlobalRef(obj2);
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flds[8].val.z = JNI_TRUE;
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flds[9].val.z = JNI_FALSE;
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flds[10].val.b = 123;
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flds[11].val.b = -123;
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flds[12].val.s = 12345;
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flds[13].val.s = -12345;
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flds[14].val.c = 0xabcd;
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flds[15].val.c = 0xdcba;
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for (i = 0; i < sizeof(flds) / sizeof(field); i++) {
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if (flds[i].stat == JNI_TRUE) {
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flds[i].fid = env->GetStaticFieldID(cls, flds[i].name, flds[i].sig);
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} else {
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flds[i].fid = env->GetFieldID(cls, flds[i].name, flds[i].sig);
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}
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if (flds[i].fid == NULL) {
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printf("Unable to set modification watch on %s fld%" PRIuPTR ", fieldID=0",
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flds[i].descr, i);
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} else {
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if (printdump == JNI_TRUE) {
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printf(">>> setting modification watch on %s", flds[i].descr);
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printf(" fld%" PRIuPTR ", fieldID=0x%p\n", i, flds[i].fid);
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}
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err = jvmti->SetFieldModificationWatch(cls, flds[i].fid);
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if (err != JVMTI_ERROR_NONE) {
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printf("(SetFieldModificationWatch#%" PRIuPTR ") unexpected error:", i);
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printf(" %s (%d)\n", 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_MODIFICATION, 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_SetFieldModificationWatch_setfmodw005_check(JNIEnv *env,
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jclass cls, jint ind) {
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int flag_err = 0;
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if (!caps.can_generate_field_modification_events) {
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return;
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}
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if (printdump == JNI_TRUE) {
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printf(">>> checking on %s fld%d\n", flds[ind].descr, ind);
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printf(">>> new value expected=0x%08x%08x, actual=0x%08x%08x\n",
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(jint)(flds[ind].val.j >> 32), (jint)flds[ind].val.j,
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(jint)(actual_val.j >> 32), (jint)actual_val.j);
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}
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if (actual_fid != flds[ind].fid) {
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result = STATUS_FAILED;
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if (!flag_err) {
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printf("Field %s fld%d thrown error:\n", flds[ind].descr, ind);
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flag_err = 1;
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}
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printf(" field ID expected=0x%p, actual=0x%p\n",
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flds[ind].fid, actual_fid);
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}
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if (actual_sig != flds[ind].sig[0]) {
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result = STATUS_FAILED;
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if (!flag_err) {
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printf("Field %s fld%d thrown error:\n", flds[ind].descr, ind);
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flag_err = 1;
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}
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printf(" signature expected=%c, actual=%c\n",
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flds[ind].sig[0], actual_sig);
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}
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switch (flds[ind].sig[0]) {
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case 'J':
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if (actual_val.j != flds[ind].val.j) {
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result = STATUS_FAILED;
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if (!flag_err) {
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printf("Field %s fld%d thrown error:\n", flds[ind].descr, ind);
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flag_err = 1;
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}
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printf(" new value expected=0x%x%08x, actual=0x%x%08x\n",
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(jint)(flds[ind].val.j >> 32), (jint)flds[ind].val.j,
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(jint)(actual_val.j >> 32), (jint)actual_val.j);
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}
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break;
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case 'F':
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if (actual_val.f != flds[ind].val.f) {
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result = STATUS_FAILED;
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if (!flag_err) {
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printf("Field %s fld%d thrown error:\n", flds[ind].descr, ind);
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flag_err = 1;
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}
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printf(" new value expected=%f, actual=%f\n",
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(double)flds[ind].val.f, (double)actual_val.f);
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}
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break;
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case 'D':
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if (actual_val.d != flds[ind].val.d) {
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result = STATUS_FAILED;
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if (!flag_err) {
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printf("Field %s fld%d thrown error:\n", flds[ind].descr, ind);
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flag_err = 1;
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}
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printf(" new value expected=%f, actual=%f\n",
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(double)flds[ind].val.d, (double)actual_val.d);
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}
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break;
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case 'L':
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if (!env->IsSameObject(actual_val.l, flds[ind].val.l)) {
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result = STATUS_FAILED;
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if (!flag_err) {
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printf("Field %s fld%d thrown error:\n", flds[ind].descr, ind);
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flag_err = 1;
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}
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printf(" new value is not the same as expected\n");
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}
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break;
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case 'Z':
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if (actual_val.z != flds[ind].val.z) {
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result = STATUS_FAILED;
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if (!flag_err) {
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printf("Field %s fld%d thrown error:\n", flds[ind].descr, ind);
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flag_err = 1;
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}
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printf(" new value expected=0x%x, actual=0x%x\n",
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flds[ind].val.z, actual_val.z);
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}
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break;
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case 'B':
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if (actual_val.b != flds[ind].val.b) {
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result = STATUS_FAILED;
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if (!flag_err) {
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printf("Field %s fld%d thrown error:\n", flds[ind].descr, ind);
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flag_err = 1;
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}
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printf(" new value expected=%d, actual=%d\n",
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flds[ind].val.b, actual_val.b);
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}
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break;
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case 'S':
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if (actual_val.s != flds[ind].val.s) {
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result = STATUS_FAILED;
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if (!flag_err) {
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printf("Field %s fld%d thrown error:\n", flds[ind].descr, ind);
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flag_err = 1;
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}
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printf(" new value expected=%d, actual=%d\n",
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flds[ind].val.s, actual_val.s);
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}
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break;
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case 'C':
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if (actual_val.c != flds[ind].val.c) {
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result = STATUS_FAILED;
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if (!flag_err) {
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printf("Field %s fld%d thrown error:\n", flds[ind].descr, ind);
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flag_err = 1;
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}
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printf(" new value expected=0x%x, actual=0x%x\n",
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flds[ind].val.c, actual_val.c);
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}
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break;
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default:
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break;
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}
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actual_fid = NULL;
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actual_sig = '\0';
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actual_val.j = 0L;
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}
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JNIEXPORT jint JNICALL
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Java_nsk_jvmti_SetFieldModificationWatch_setfmodw005_getRes(JNIEnv *env,
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jclass cls) {
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return result;
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}
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}
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