207 lines
6.6 KiB
C
207 lines
6.6 KiB
C
/*
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* Copyright (c) 2007, 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 <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 STATUS_FAILED 2
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#define PASSED 0
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static jvmtiEnv *jvmti = NULL;
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static jvmtiCapabilities caps;
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static jvmtiEventCallbacks callbacks;
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static int watch_ev = 0; /* ignore JVMTI events by default */
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static int gen_ev = 0; /* number of generated events */
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static int result = PASSED; /* total result of the test */
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static jrawMonitorID watch_ev_monitor;
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static void set_watch_ev(int value) {
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(*jvmti)->RawMonitorEnter(jvmti, watch_ev_monitor);
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watch_ev = value;
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(*jvmti)->RawMonitorExit(jvmti, watch_ev_monitor);
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}
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void JNICALL
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NativeMethodBind(jvmtiEnv *jvmti_env, JNIEnv *env, jthread thr, jmethodID methodID, void * pAddress, void ** pNewAddress) {
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(*jvmti)->RawMonitorEnter(jvmti, watch_ev_monitor);
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if (watch_ev && isThreadExpected(jvmti_env, thr)) {
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printf("#### JVMTI_EVENT_NATIVE_METHOD_BIND occured ####\n");
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gen_ev++;
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}
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(*jvmti)->RawMonitorExit(jvmti, watch_ev_monitor);
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}
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#ifdef STATIC_BUILD
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JNIEXPORT jint JNICALL Agent_OnLoad_redefclass031(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_redefclass031(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_redefclass031(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 *vm, char *options, void *reserved) {
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jint res;
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jvmtiError err;
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if ((res = JNI_ENV_PTR(vm)->GetEnv(JNI_ENV_ARG(vm, (void **) &jvmti),
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JVMTI_VERSION_1_1)) != JNI_OK) {
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printf("%s: Failed to call GetEnv: error=%d\n", __FILE__, res);
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return JNI_ERR;
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}
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err = (*jvmti)->GetPotentialCapabilities(jvmti, &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(jvmti, &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(jvmti, &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_redefine_classes) {
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printf("Warning: RedefineClasses is not implemented\n");
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}
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callbacks.NativeMethodBind = &NativeMethodBind;
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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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err = (*jvmti)->CreateRawMonitor(jvmti, "watch_ev_monitor", &watch_ev_monitor);
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if (err != JVMTI_ERROR_NONE) {
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printf("(CreateRawMonitor) 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 jint JNICALL
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Java_nsk_jvmti_RedefineClasses_redefclass031_makeRedefinition(JNIEnv *env,
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jclass cls, jint vrb, jclass redefCls, jbyteArray classBytes) {
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jvmtiError err;
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jvmtiClassDefinition classDef;
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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 (!caps.can_redefine_classes) {
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return PASSED;
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}
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if ((err = (*jvmti)->SetEventNotificationMode(jvmti, JVMTI_ENABLE,
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JVMTI_EVENT_NATIVE_METHOD_BIND, NULL)) != JVMTI_ERROR_NONE) {
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printf("Failed to enable JVMTI_EVENT_NATIVE_METHOD_BIND: %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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/* filling the structure jvmtiClassDefinition */
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classDef.klass = redefCls;
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classDef.class_byte_count =
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JNI_ENV_PTR(env)->GetArrayLength(JNI_ENV_ARG(env, classBytes));
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classDef.class_bytes = (unsigned char *)
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JNI_ENV_PTR(env)->GetByteArrayElements(JNI_ENV_ARG(env, classBytes), NULL);
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set_watch_ev(1); /* watch JVMTI events */
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if (vrb == 1)
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printf(">>>>>>>> Invoke RedefineClasses():\n\tnew class byte count=%d\n",
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classDef.class_byte_count);
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if ((err = ((*jvmti)->RedefineClasses(jvmti, 1, &classDef))) != JVMTI_ERROR_NONE) {
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printf("TEST FAILED: the function RedefineClasses() returned error %d: %s\n",
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err, TranslateError(err));
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printf("\tFor more info about this error see the JVMTI spec.\n");
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result = STATUS_FAILED;
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}
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else if (vrb == 1)
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printf("Check #1 PASSED: RedefineClasses() is successfully done\n");
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set_watch_ev(0); /* again ignore JVMTI events */
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if (gen_ev) {
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printf("TEST FAILED: %d unexpected JVMTI events were generated by the function RedefineClasses()\n",
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gen_ev);
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result = STATUS_FAILED;
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} else if (vrb == 1)
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printf("Check #2 PASSED: No unexpected JVMTI events were generated by the function RedefineClasses()\n");
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return(result);
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}
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JNIEXPORT void JNICALL
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Java_nsk_jvmti_RedefineClasses_redefclass031r_nativeMethod(JNIEnv * pEnv, jclass klass)
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{
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printf("redefclass031r::nativeMethod is called.\n");
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}
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#ifdef __cplusplus
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}
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#endif
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