232 lines
6.9 KiB
C++
232 lines
6.9 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 <stdlib.h>
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#include <string.h>
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#include <jvmti.h>
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#include "jvmti_common.hpp"
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extern "C" {
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#define STATUS_FAILED 2
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#define PASSED 0
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/* tested method */
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static const char *METHODS[] = {
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"nativeMethod", "()V"
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};
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/* event counter for the tested method and expected number
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of the events */
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static volatile int bindEv[] = {
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0, 1
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};
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static const char *CLASS_SIG =
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"Lnativemethbind03$TestedClass;";
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static volatile jint result = PASSED;
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static jvmtiEnv *jvmti = nullptr;
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static jvmtiEventCallbacks callbacks;
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static jrawMonitorID counter_lock;
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/** callback functions **/
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void JNICALL
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NativeMethodBind(jvmtiEnv *jvmti, JNIEnv *jni, jthread thread, jmethodID method, void *addr, void **new_addr) {
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jvmtiPhase phase;
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jvmtiError err;
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char *methNam, *methSig;
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RawMonitorLocker rml(jvmti, jni, counter_lock);
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LOG(">>>> NativeMethodBind event received\n");
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err = jvmti->GetPhase(&phase);
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if (err != JVMTI_ERROR_NONE) {
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LOG(">>>> Error getting phase\n");
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result = STATUS_FAILED;
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return;
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}
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if (phase != JVMTI_PHASE_LIVE && phase != JVMTI_PHASE_START) {
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return;
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}
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err = jvmti->GetMethodName(method, &methNam, &methSig, nullptr);
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if (err != JVMTI_ERROR_NONE) {
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result = STATUS_FAILED;
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COMPLAIN("TEST FAILED: unable to get method name during NativeMethodBind callback\n\n");
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return;
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}
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if ((strcmp(methNam, METHODS[0]) == 0) && (strcmp(methSig, METHODS[1]) == 0)) {
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bindEv[0]++;
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LOG("\tmethod: \"%s %s\"\n", methNam, methSig);
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}
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if (methNam != nullptr) {
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err = jvmti->Deallocate((unsigned char *) methNam);
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if (err != JVMTI_ERROR_NONE) {
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result = STATUS_FAILED;
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LOG("TEST FAILED: unable to deallocate memory pointed to method name\n\n");
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}
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}
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if (methSig != nullptr) {
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err = jvmti->Deallocate((unsigned char *) methSig);
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if (err != JVMTI_ERROR_NONE) {
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result = STATUS_FAILED;
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LOG("TEST FAILED: unable to deallocate memory pointed to method signature\n\n");
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}
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}
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LOG("<<<<\n\n");
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}
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void JNICALL
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VMDeath(jvmtiEnv *jvmti, JNIEnv *jni) {
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LOG("VMDeath event received\n");
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if (bindEv[0] != bindEv[1]) {
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result = STATUS_FAILED;
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LOG("TEST FAILED: wrong NativeMethodBind events\n"
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"\tfor tested method \"%s %s\" bound with \"%s\":\n"
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"\tgot: %d\texpected: %d\n\n",
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METHODS[0], METHODS[1], CLASS_SIG, bindEv[0], bindEv[1]);
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} else {
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LOG("CHECK PASSED: %d NativeMethodBind event(s)\n"
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"\tfor tested method \"%s %s\" bound with \"%s\"\n"
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"\tas expected\n",
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bindEv[0], METHODS[0], METHODS[1], CLASS_SIG);
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}
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if (result == STATUS_FAILED)
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exit(95 + STATUS_FAILED);
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}
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/* dummy method used only to provoke NativeMethodBind event */
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static void JNICALL
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nativeMethod(JNIEnv *jni, jobject obj) {
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LOG("inside the nativeMethod()\n");
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}
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/* dummy method used only to provoke NativeMethodBind event */
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JNIEXPORT void JNICALL
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Java_nativemethbind03_registerNative(JNIEnv *jni, jobject obj) {
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jclass testedCls = nullptr;
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JNINativeMethod meth;
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LOG("Inside the registerNative()\n"
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"Finding class \"%s\" ...\n", CLASS_SIG);
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testedCls = jni->FindClass(CLASS_SIG);
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if (testedCls == nullptr) {
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result = STATUS_FAILED;
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COMPLAIN("TEST FAILURE: unable to find class \"%s\"\n\n", CLASS_SIG);
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return;
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}
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meth.name = (char *) METHODS[0];
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meth.signature = (char *) METHODS[1];
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meth.fnPtr = (void *) nativeMethod;
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LOG("Calling RegisterNatives() with \"%s %s\"\n"
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"\tfor class \"%s\" ...\n", METHODS[0], METHODS[1], CLASS_SIG);
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if (jni->RegisterNatives(testedCls, &meth, 1) != 0) {
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result = STATUS_FAILED;
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COMPLAIN("TEST FAILURE: unable to RegisterNatives() \"%s %s\" for class \"%s\"\n\n",
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METHODS[0], METHODS[1], CLASS_SIG);
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}
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LOG("Calling UnregisterNatives() for class \"%s\" ...\n", CLASS_SIG);
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if (jni->UnregisterNatives(testedCls) != 0) {
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result = STATUS_FAILED;
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COMPLAIN("TEST FAILURE: unable to UnregisterNatives() \"%c %c\" for class \"%s\"\n\n",
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METHODS[1][0], METHODS[1][1], CLASS_SIG);
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}
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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_9);
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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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/* create a raw monitor */
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counter_lock = create_raw_monitor(jvmti, "_counter_lock");
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/* add capability to generate compiled method events */
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memset(&caps, 0, sizeof(jvmtiCapabilities));
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caps.can_generate_native_method_bind_events = 1;
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err = jvmti->AddCapabilities(&caps);
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if (err != JVMTI_ERROR_NONE) {
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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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return JNI_ERR;
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}
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if (!caps.can_generate_native_method_bind_events)
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LOG("Warning: generation of native method bind events is not implemented\n");
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/* set event callback */
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LOG("setting event callbacks ...\n");
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(void) memset(&callbacks, 0, sizeof(callbacks));
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callbacks.NativeMethodBind = &NativeMethodBind;
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callbacks.VMDeath = &VMDeath;
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err = jvmti->SetEventCallbacks(&callbacks, sizeof(callbacks));
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if (err != JVMTI_ERROR_NONE)
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return JNI_ERR;
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LOG("setting event callbacks done\nenabling JVMTI events ...\n");
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err = jvmti->SetEventNotificationMode(JVMTI_ENABLE, JVMTI_EVENT_NATIVE_METHOD_BIND, nullptr);
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if (err != JVMTI_ERROR_NONE) {
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return JNI_ERR;
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}
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err = jvmti->SetEventNotificationMode(JVMTI_ENABLE, JVMTI_EVENT_VM_DEATH, nullptr);
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if (err != JVMTI_ERROR_NONE) {
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return JNI_ERR;
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}
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LOG("enabling the events done\n\n");
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return JNI_OK;
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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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