1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/test/runtime/8233197/libJvmtiAgent.c Fri Jun 12 02:59:56 2020 +0100
1.3 @@ -0,0 +1,124 @@
1.4 +/*
1.5 + * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + */
1.26 +
1.27 +#include <stdio.h>
1.28 +#include <stdlib.h>
1.29 +#include <string.h>
1.30 +#include "jvmti.h"
1.31 +
1.32 +#ifdef __cplusplus
1.33 +extern "C" {
1.34 +#endif
1.35 +
1.36 +#ifndef JNI_ENV_ARG
1.37 +
1.38 +#ifdef __cplusplus
1.39 +#define JNI_ENV_ARG(x, y) y
1.40 +#define JNI_ENV_PTR(x) x
1.41 +#else
1.42 +#define JNI_ENV_ARG(x,y) x, y
1.43 +#define JNI_ENV_PTR(x) (*x)
1.44 +#endif
1.45 +
1.46 +#endif
1.47 +
1.48 +#define TranslateError(err) "JVMTI error"
1.49 +
1.50 +static jvmtiEnv *jvmti = NULL;
1.51 +
1.52 +static jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved);
1.53 +
1.54 +JNIEXPORT
1.55 +jint JNICALL Agent_OnLoad(JavaVM *jvm, char *options, void *reserved) {
1.56 + return Agent_Initialize(jvm, options, reserved);
1.57 +}
1.58 +
1.59 +JNIEXPORT
1.60 +jint JNICALL Agent_OnAttach(JavaVM *jvm, char *options, void *reserved) {
1.61 + return Agent_Initialize(jvm, options, reserved);
1.62 +}
1.63 +
1.64 +JNIEXPORT
1.65 +jint JNICALL JNI_OnLoad(JavaVM *jvm, void *reserved) {
1.66 + return JNI_VERSION_1_8;
1.67 +}
1.68 +
1.69 +static void JNICALL
1.70 +Callback_VMStart(jvmtiEnv *jvmti_env, JNIEnv *env) {
1.71 + printf("Localizing jdk.jfr.FlightRecorder\n");
1.72 + // without fix for 8233197 the process will crash at the following line
1.73 + jclass cls = (*env)->FindClass(env, "jdk/jfr/FlightRecorder");
1.74 + jmethodID mid = (*env)->GetStaticMethodID(env, cls, "getFlightRecorder", "()Ljdk/jfr/FlightRecorder;");
1.75 + if (mid == 0) {
1.76 + printf("Unable to localize jdk.jfr.FlightRecorder#getFlightRecorder() method\n");
1.77 + // crash the tested JVM to make the test fail
1.78 + exit(-1);
1.79 + }
1.80 + printf("Going to initialize JFR subsystem ...\n");
1.81 + jobject jfr = (*env)->CallStaticObjectMethod(env, cls, mid);
1.82 +
1.83 + if (!(*env)->ExceptionCheck(env)) {
1.84 + // crash the tested JVM to make the test fail
1.85 + printf("JFR subsystem is wrongly initialized too early\n");
1.86 + exit(-2);
1.87 + }
1.88 + // exit VM
1.89 + exit(0);
1.90 +}
1.91 +
1.92 +static
1.93 +jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) {
1.94 + jint res, size;
1.95 + jvmtiCapabilities caps;
1.96 + jvmtiEventCallbacks callbacks;
1.97 + jvmtiError err;
1.98 +
1.99 + res = JNI_ENV_PTR(jvm)->GetEnv(JNI_ENV_ARG(jvm, (void **) &jvmti),
1.100 + JVMTI_VERSION_1_2);
1.101 + if (res != JNI_OK || jvmti == NULL) {
1.102 + printf(" Error: wrong result of a valid call to GetEnv!\n");
1.103 + return JNI_ERR;
1.104 + }
1.105 +
1.106 + size = (jint)sizeof(callbacks);
1.107 +
1.108 + memset(&callbacks, 0, sizeof(callbacks));
1.109 + callbacks.VMStart = Callback_VMStart;
1.110 +
1.111 + err = (*jvmti)->SetEventCallbacks(jvmti, &callbacks, size);
1.112 + if (err != JVMTI_ERROR_NONE) {
1.113 + printf(" Error in SetEventCallbacks: %s (%d)\n", TranslateError(err), err);
1.114 + return JNI_ERR;
1.115 + }
1.116 +
1.117 + err = (*jvmti)->SetEventNotificationMode(jvmti, JVMTI_ENABLE, JVMTI_EVENT_VM_START, (jthread)NULL);
1.118 + if (err != JVMTI_ERROR_NONE) {
1.119 + printf(" Error in SetEventNotificationMode: %s (%d)\n", TranslateError(err), err);
1.120 + return JNI_ERR;
1.121 + }
1.122 + return JNI_OK;
1.123 +}
1.124 +
1.125 +#ifdef __cplusplus
1.126 +}
1.127 +#endif
