1 /*
 2  * Copyright (c) 2003, 2018, Oracle and/or its affiliates. All rights reserved.
 3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 4  *
 5  * This code is free software; you can redistribute it and/or modify it
 6  * under the terms of the GNU General Public License version 2 only, as
 7  * published by the Free Software Foundation.
 8  *
 9  * This code is distributed in the hope that it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12  * version 2 for more details (a copy is included in the LICENSE file that
13  * accompanied this code).
14  *
15  * You should have received a copy of the GNU General Public License version
16  * 2 along with this work; if not, write to the Free Software Foundation,
17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18  *
19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20  * or visit www.oracle.com if you need additional information or have any
21  * questions.
22  */
23 
24 #include <stdio.h>
25 #include <string.h>
26 #include "jvmti.h"
27 #include "jvmti_common.h"
28 
29 extern "C" {
30 
31 
32 #define PASSED 0
33 #define STATUS_FAILED 2
34 
35 static jvmtiEnv *jvmti = NULL;
36 static jint result = PASSED;
37 
38 jint Agent_OnLoad(JavaVM *jvm, char *options, void *reserved) {
39     jint res;
40 
41     res = jvm->GetEnv((void **) &jvmti, JVMTI_VERSION_1_1);
42     if (res != JNI_OK || jvmti == NULL) {
43         LOG("Wrong result of a valid call to GetEnv!\n");
44         return JNI_ERR;
45     }
46 
47     return JNI_OK;
48 }
49 
50 JNIEXPORT jint JNICALL
51 Java_framecnt03_check(JNIEnv *env, jclass cls) {
52     jvmtiError err;
53     jint countPtr;
54 
55     if (jvmti == NULL) {
56         LOG("JVMTI client was not properly loaded!\n");
57         return STATUS_FAILED;
58     }
59 
60     err = jvmti->GetFrameCount(cls, &countPtr);
61     if (err != JVMTI_ERROR_INVALID_THREAD) {
62         LOG("Error expected: JVMTI_ERROR_INVALID_THREAD,\n");
63         LOG("        actual: %s (%d)\n", TranslateError(err), err);
64         result = STATUS_FAILED;
65     }
66 
67     return result;
68 }
69 
70 }