1 /*
2 * Copyright (c) 2020, 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 "agent_common.hpp"
28 #include "JVMTITools.hpp"
29
30 extern "C" {
31
32
33 #define PASSED 0
34 #define STATUS_FAILED 2
35
36 static jvmtiEnv *jvmti = NULL;
37 static jvmtiCapabilities caps;
38 static jint result = PASSED;
39 static jboolean printdump = JNI_FALSE;
40
41 #ifdef STATIC_BUILD
42 JNIEXPORT jint JNICALL Agent_OnLoad_objmonusage007(JavaVM *jvm, char *options, void *reserved) {
43 return Agent_Initialize(jvm, options, reserved);
44 }
45 JNIEXPORT jint JNICALL Agent_OnAttach_objmonusage007(JavaVM *jvm, char *options, void *reserved) {
46 return Agent_Initialize(jvm, options, reserved);
47 }
48 JNIEXPORT jint JNI_OnLoad_objmonusage007(JavaVM *jvm, char *options, void *reserved) {
49 return JNI_VERSION_1_8;
50 }
51 #endif
52 jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) {
53 jint res;
54 jvmtiError err;
55
56 if (options != NULL && strcmp(options, "printdump") == 0) {
57 printdump = JNI_TRUE;
58 }
59
60 res = jvm->GetEnv((void **) &jvmti, JVMTI_VERSION_1_1);
61 if (res != JNI_OK || jvmti == NULL) {
62 printf("Wrong result of a valid call to GetEnv !\n");
63 return JNI_ERR;
64 }
65
66 err = jvmti->GetPotentialCapabilities(&caps);
67 if (err != JVMTI_ERROR_NONE) {
68 printf("(GetPotentialCapabilities) unexpected error: %s (%d)\n",
69 TranslateError(err), err);
70 return JNI_ERR;
71 }
72
73 err = jvmti->AddCapabilities(&caps);
74 if (err != JVMTI_ERROR_NONE) {
75 printf("(AddCapabilities) unexpected error: %s (%d)\n",
76 TranslateError(err), err);
77 return JNI_ERR;
78 }
79
80 err = jvmti->GetCapabilities(&caps);
81 if (err != JVMTI_ERROR_NONE) {
82 printf("(GetCapabilities) unexpected error: %s (%d)\n",
83 TranslateError(err), err);
84 return JNI_ERR;
85 }
86
87 if (!caps.can_get_monitor_info) {
88 printf("Warning: GetObjectMonitorUsage is not implemented\n");
89 }
90
91 return JNI_OK;
92 }
93
94 JNIEXPORT void JNICALL
95 Java_nsk_jvmti_GetObjectMonitorUsage_objmonusage007_check(JNIEnv *env,
96 jclass cls, jobject obj, jthread owner,
97 jint entryCount, jint waiterCount) {
98 jvmtiError err;
99 jvmtiMonitorUsage inf;
100 jvmtiThreadInfo tinf;
101 int j;
102
103 if (result == STATUS_FAILED) {
104 return;
105 }
106
107 err = jvmti->GetObjectMonitorUsage(obj, &inf);
108 if (err == JVMTI_ERROR_MUST_POSSESS_CAPABILITY &&
109 !caps.can_get_monitor_info) {
110 /* Ok, it's expected */
111 return;
112 } else if (err != JVMTI_ERROR_NONE) {
113 printf("(GetMonitorInfo) unexpected error: %s (%d)\n",
114 TranslateError(err), err);
115 result = STATUS_FAILED;
116 return;
117 }
118
119 if (printdump == JNI_TRUE) {
120 if (inf.owner == NULL) {
121 printf(">>> owner: none (0x0)\n");
122 } else {
123 jvmti->GetThreadInfo(inf.owner, &tinf);
124 printf(">>> owner: %s (0x%p)\n",
125 tinf.name, inf.owner);
126 }
127 printf(">>> entry_count: %d\n", inf.entry_count);
128 printf(">>> waiter_count: %d\n", inf.waiter_count);
129 if (inf.waiter_count > 0) {
130 printf(">>> waiters:\n");
131 for (j = 0; j < inf.waiter_count; j++) {
132 jvmti->GetThreadInfo(inf.waiters[j], &tinf);
133 printf(">>> %2d: %s (0x%p)\n",
134 j, tinf.name, inf.waiters[j]);
135 }
136 }
137 printf(">>> notify_waiter_count: %d\n", inf.notify_waiter_count);
138 if (inf.notify_waiter_count > 0) {
139 printf(">>> notify_waiters:\n");
140 for (j = 0; j < inf.notify_waiter_count; j++) {
141 jvmti->GetThreadInfo(inf.notify_waiters[j], &tinf);
142 printf(">>> %2d: %s (0x%p)\n",
143 j, tinf.name, inf.notify_waiters[j]);
144 }
145 }
146 }
147
148 if (!env->IsSameObject(owner, inf.owner)) {
149 jvmti->GetThreadInfo(inf.owner, &tinf);
150 printf(" unexpected owner: %s (0x%p)\n", tinf.name, inf.owner);
151 result = STATUS_FAILED;
152 }
153
154 if (inf.entry_count != entryCount) {
155 printf(" entry_count expected: %d, actually: %d\n",
156 entryCount, inf.entry_count);
157 result = STATUS_FAILED;
158 }
159
160 if (inf.waiter_count != waiterCount) {
161 printf(" waiter_count expected: %d, actually: %d\n",
162 waiterCount, inf.waiter_count);
163 result = STATUS_FAILED;
164 }
165 }
166
167 JNIEXPORT jint JNICALL
168 Java_nsk_jvmti_GetObjectMonitorUsage_objmonusage007_getResult(JNIEnv *env, jclass cls) {
169 return result;
170 }
171
172 }