331 lines
11 KiB
C
331 lines
11 KiB
C
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/*
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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 <inttypes.h>
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#include <stdio.h>
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#include <string.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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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef JNI_ENV_ARG
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#ifdef __cplusplus
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#define JNI_ENV_ARG(x, y) y
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#define JNI_ENV_PTR(x) x
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#else
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#define JNI_ENV_ARG(x,y) x, y
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#define JNI_ENV_PTR(x) (*x)
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#endif
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#endif
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#define PASSED 0
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#define STATUS_FAILED 2
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#define EXP_STATUS (JVMTI_CLASS_STATUS_VERIFIED | JVMTI_CLASS_STATUS_PREPARED)
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typedef struct {
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char *sig;
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jint status;
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jint mcount;
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jint fcount;
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jint icount;
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} class_info;
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static jvmtiEnv *jvmti = NULL;
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static jvmtiEventCallbacks callbacks;
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static jint result = PASSED;
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static jboolean printdump = JNI_FALSE;
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static size_t eventsCount = 0;
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static size_t eventsExpected = 0;
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static class_info classes[] = {
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{"Lnsk/jvmti/ClassPrepare/classprep001$TestInterface;", EXP_STATUS, 2, 1, 0},
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{"Lnsk/jvmti/ClassPrepare/classprep001$TestClass;", EXP_STATUS, 3, 2, 1}
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};
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void printStatus(jint status) {
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int flags = 0;
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if ((status & JVMTI_CLASS_STATUS_VERIFIED) != 0) {
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printf("JVMTI_CLASS_STATUS_VERIFIED");
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flags++;
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}
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if ((status & JVMTI_CLASS_STATUS_PREPARED) != 0) {
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if (flags > 0) printf(" | ");
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printf("JVMTI_CLASS_STATUS_PREPARED");
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flags++;
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}
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if ((status & JVMTI_CLASS_STATUS_INITIALIZED) != 0) {
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if (flags > 0) printf(" | ");
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printf("JVMTI_CLASS_STATUS_INITIALIZED");
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flags++;
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}
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if ((status & JVMTI_CLASS_STATUS_ERROR) != 0) {
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if (flags > 0) printf(" | ");
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printf("JVMTI_CLASS_STATUS_ERROR");
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flags++;
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}
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printf(" (0x%x)\n", status);
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}
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void JNICALL ClassPrepare(jvmtiEnv *jvmti_env, JNIEnv *env,
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jthread thr, jclass cls) {
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jvmtiError err;
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class_info inf;
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jmethodID *methods;
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jfieldID *fields;
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jclass *interfaces;
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char *name, *sig, *generic;
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int i;
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err = (*jvmti_env)->GetClassSignature(jvmti_env, cls, &inf.sig, &generic);
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if (err != JVMTI_ERROR_NONE) {
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printf("(GetClassSignature#%" PRIuPTR ") unexpected error: %s (%d)\n",
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eventsCount, TranslateError(err), err);
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result = STATUS_FAILED;
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}
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err = (*jvmti_env)->GetClassStatus(jvmti_env, cls, &inf.status);
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if (err != JVMTI_ERROR_NONE) {
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printf("(GetClassStatus#%" PRIuPTR ") unexpected error: %s (%d)\n",
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eventsCount, TranslateError(err), err);
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result = STATUS_FAILED;
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}
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err = (*jvmti_env)->GetClassMethods(jvmti_env, cls, &inf.mcount, &methods);
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if (err != JVMTI_ERROR_NONE) {
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printf("(GetClassMethods#%" PRIuPTR ") unexpected error: %s (%d)\n",
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eventsCount, TranslateError(err), err);
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result = STATUS_FAILED;
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}
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err = (*jvmti_env)->GetClassFields(jvmti_env, cls, &inf.fcount, &fields);
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if (err != JVMTI_ERROR_NONE) {
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printf("(GetClassMethods#%" PRIuPTR ") unexpected error: %s (%d)\n",
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eventsCount, TranslateError(err), err);
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result = STATUS_FAILED;
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}
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err = (*jvmti_env)->GetImplementedInterfaces(jvmti_env, cls,
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&inf.icount, &interfaces);
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if (err != JVMTI_ERROR_NONE) {
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printf("(GetImplementedInterfaces#%" PRIuPTR ") unexpected error: %s (%d)\n",
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eventsCount, TranslateError(err), err);
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result = STATUS_FAILED;
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}
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if (printdump == JNI_TRUE) {
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printf(">>> [class prepare event #%" PRIuPTR "]", eventsCount);
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printf(" \"%s\"\n", inf.sig);
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printf(">>> status: ");
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printStatus(inf.status);
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printf(">>> %d methods:", inf.mcount);
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for (i = 0; i < inf.mcount; i++) {
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if (i > 0) printf(",");
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if (methods[i] == NULL) {
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printf(" null");
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} else {
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err = (*jvmti_env)->GetMethodName(jvmti_env, methods[i],
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&name, &sig, &generic);
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if (err == JVMTI_ERROR_NONE) {
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printf(" \"%s%s\"", name, sig);
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} else {
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printf(" ???");
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}
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}
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}
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printf("\n");
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printf(">>> %d fields:", inf.fcount);
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for (i = 0; i < inf.fcount; i++) {
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if (i > 0) printf(",");
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if (fields[i] == NULL) {
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printf(" null");
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} else {
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err = (*jvmti_env)->GetFieldName(jvmti_env, cls, fields[i],
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&name, &sig, &generic);
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if (err == JVMTI_ERROR_NONE) {
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printf(" \"%s, %s\"", name, sig);
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} else {
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printf(" ???");
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}
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}
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}
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printf("\n");
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printf(">>> %d interfaces:", inf.icount);
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for (i = 0; i < inf.icount; i++) {
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if (i > 0) printf(",");
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if (interfaces[i] == NULL) {
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printf(" null");
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} else {
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err = (*jvmti_env)->GetClassSignature(jvmti_env,
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interfaces[i], &sig, &generic);
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if (err == JVMTI_ERROR_NONE) {
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printf(" \"%s\"", sig);
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} else {
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printf(" ???");
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}
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}
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}
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printf("\n");
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}
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if (eventsCount >= eventsExpected) {
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printf("(#%" PRIuPTR ") too many events: %" PRIuPTR ", expected: %" PRIuPTR "\n",
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eventsCount, eventsCount + 1, eventsExpected);
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result = STATUS_FAILED;
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return;
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}
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if (inf.sig == NULL || strcmp(inf.sig, classes[eventsCount].sig) != 0) {
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printf("(#%" PRIuPTR ") wrong class: \"%s\"",
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eventsCount, inf.sig);
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printf(", expected: \"%s\"\n", classes[eventsCount].sig);
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result = STATUS_FAILED;
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}
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if (inf.status != classes[eventsCount].status) {
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printf("(#%" PRIuPTR ") wrong status: ", eventsCount);
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printStatus(inf.status);
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printf(" expected: ");
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printStatus(classes[eventsCount].status);
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result = STATUS_FAILED;
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}
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if (inf.mcount != classes[eventsCount].mcount) {
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printf("(#%" PRIuPTR ") wrong number of methods: 0x%x",
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eventsCount, inf.mcount);
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printf(", expected: 0x%x\n", classes[eventsCount].mcount);
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result = STATUS_FAILED;
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}
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if (inf.fcount != classes[eventsCount].fcount) {
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printf("(#%" PRIuPTR ") wrong number of fields: 0x%x",
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eventsCount, inf.fcount);
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printf(", expected: 0x%x\n", classes[eventsCount].fcount);
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result = STATUS_FAILED;
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}
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if (inf.icount != classes[eventsCount].icount) {
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printf("(#%" PRIuPTR ") wrong number of interfaces: 0x%x",
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eventsCount, inf.icount);
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printf(", expected: 0x%x\n", classes[eventsCount].icount);
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result = STATUS_FAILED;
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}
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eventsCount++;
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}
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#ifdef STATIC_BUILD
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JNIEXPORT jint JNICALL Agent_OnLoad_classprep001(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_classprep001(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_classprep001(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 = JNI_ENV_PTR(jvm)->
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GetEnv(JNI_ENV_ARG(jvm, (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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callbacks.ClassPrepare = &ClassPrepare;
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err = (*jvmti)->SetEventCallbacks(jvmti, &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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return JNI_OK;
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}
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JNIEXPORT void JNICALL
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Java_nsk_jvmti_ClassPrepare_classprep001_getReady(JNIEnv *env, jclass cls) {
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jvmtiError err;
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jthread prep_thread;
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if (jvmti == NULL) {
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printf("JVMTI client was not properly loaded!\n");
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return;
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}
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if ((err = ((*jvmti)->GetCurrentThread(jvmti, &prep_thread))) != JVMTI_ERROR_NONE) {
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printf("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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err = (*jvmti)->SetEventNotificationMode(jvmti, JVMTI_ENABLE,
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JVMTI_EVENT_CLASS_PREPARE, prep_thread);
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if (err == JVMTI_ERROR_NONE) {
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eventsExpected = sizeof(classes)/sizeof(class_info);
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} else {
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printf("Failed to enable JVMTI_EVENT_CLASS_PREPARE: %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 jint JNICALL
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Java_nsk_jvmti_ClassPrepare_classprep001_check(JNIEnv *env, jclass cls) {
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jvmtiError err;
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jthread prep_thread;
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if (jvmti == NULL) {
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printf("JVMTI client was not properly loaded!\n");
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return STATUS_FAILED;
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}
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if ((err = ((*jvmti)->GetCurrentThread(jvmti, &prep_thread))) != JVMTI_ERROR_NONE) {
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printf("Failed to get current thread: %s (%d)\n", TranslateError(err), err);
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return STATUS_FAILED;
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}
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err = (*jvmti)->SetEventNotificationMode(jvmti, JVMTI_DISABLE,
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JVMTI_EVENT_CLASS_PREPARE, prep_thread);
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if (err != JVMTI_ERROR_NONE) {
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printf("Failed to disable JVMTI_EVENT_CLASS_PREPARE: %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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if (eventsCount != eventsExpected) {
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printf("Wrong number of class prepare events: %" PRIuPTR ", expected: %" PRIuPTR "\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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#ifdef __cplusplus
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}
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#endif
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