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 "agent_common.h"
28
29 #ifdef __cplusplus
30 extern "C" {
31 #endif
32
33 #ifndef JNI_ENV_ARG
34
35 #ifdef __cplusplus
36 #define JNI_ENV_ARG(x, y) y
37 #define JNI_ENV_ARG1(x)
38 #define JNI_ENV_PTR(x) x
39 #else
40 #define JNI_ENV_ARG(x,y) x, y
41 #define JNI_ENV_ARG1(x) x
42 #define JNI_ENV_PTR(x) (*x)
43 #endif
44
45 #endif
46
47 #define JVMTI_ENV_ARG JNI_ENV_ARG
48 #define JVMTI_ENV_ARG1 JNI_ENV_ARG1
49 #define JVMTI_ENV_PTR JNI_ENV_PTR
50
51 #define JVMTI_ERROR_CHECK(str,res) if ( res != JVMTI_ERROR_NONE) { printf(str); printf("%d\n",res); return res;}
52 #define JVMTI_ERROR_CHECK_VOID(str,res) if ( res != JVMTI_ERROR_NONE) { printf(str); printf("%d\n",res); iGlobalStatus = 2; }
53
54 #define THREADS_LIMIT 8
55
56 jrawMonitorID access_lock;
57 jvmtiEnv *jvmti;
58 jint iGlobalStatus = 0;
59 jthread susp_thrd[THREADS_LIMIT];
60 static jvmtiEventCallbacks callbacks;
61 static jvmtiCapabilities jvmti_caps;
62
63
64 int printdump = 0;
65 int gc_start_count =0;
66 int gc_finish_count =0;
67
68
69 void debug_printf(const char *fmt, ...) {
70 va_list args;
71
72 va_start(args, fmt);
73 if (printdump) {
74 vprintf(fmt, args);
75 }
76 va_end(args);
77 }
78
79
80 void JNICALL vmInit(jvmtiEnv *jvmti_env, JNIEnv *env, jthread thread) {
81
82 debug_printf("VMInit event done\n");
83 }
84
85 void JNICALL vmExit(jvmtiEnv *jvmti_env, JNIEnv *env) {
86 debug_printf("------------ JVMTI_EVENT_VM_DEATH ------------\n");
87 debug_printf("JVMTI_EVENT_GARBAGE_COLLECTION_START count: %d\n",gc_start_count);
88 debug_printf("JVMTI_EVENT_GARBAGE_COLLECTION_FINISH count: %d\n",gc_finish_count);
89 }
90
91 void JNICALL gc_start(jvmtiEnv *jvmti_env) {
92
93 gc_start_count++;
94 debug_printf("Event: JVMTI_EVENT_GC_START\n");
95 }
96
97 void JNICALL gc_finish(jvmtiEnv *jvmti_env) {
98
99 gc_finish_count++;
100 debug_printf("Event: JVMTI_EVENT_GC_FINISH\n");
101 }
102
103
104 void init_callbacks() {
105 memset((void *)&callbacks, 0, sizeof(jvmtiEventCallbacks));
106 callbacks.VMInit = vmInit;
107 callbacks.VMDeath = vmExit;
108 callbacks.GarbageCollectionStart = gc_start;
109 callbacks.GarbageCollectionFinish = gc_finish;
110 }
111
112
113 #ifdef STATIC_BUILD
114 JNIEXPORT jint JNICALL Agent_OnLoad_gc(JavaVM *jvm, char *options, void *reserved) {
115 return Agent_Initialize(jvm, options, reserved);
116 }
117 JNIEXPORT jint JNICALL Agent_OnAttach_gc(JavaVM *jvm, char *options, void *reserved) {
118 return Agent_Initialize(jvm, options, reserved);
119 }
120 JNIEXPORT jint JNI_OnLoad_gc(JavaVM *jvm, char *options, void *reserved) {
121 return JNI_VERSION_1_8;
122 }
123 #endif
124 jint Agent_Initialize(JavaVM * jvm, char *options, void *reserved) {
125 jint res;
126
127 if (options && strlen(options) > 0) {
128 if (strstr(options, "printdump")) {
129 printdump = 1;
130 }
131 }
132
133 res = JNI_ENV_PTR(jvm)->
134 GetEnv(JNI_ENV_ARG(jvm, (void **) &jvmti), JVMTI_VERSION_1_1);
135 if (res < 0) {
136 debug_printf("Wrong result of a valid call to GetEnv!\n");
137 return JNI_ERR;
138 }
139
140 /* Create data access lock */
141 res = JVMTI_ENV_PTR(jvmti)->CreateRawMonitor(JVMTI_ENV_ARG(jvmti,"_access_lock"),&access_lock);
142 JVMTI_ERROR_CHECK("RawMonitorEnter in monitor_contended_entered failed with error code ", res);
143
144
145 /* Add capabilities */
146 res = JVMTI_ENV_PTR(jvmti)->GetPotentialCapabilities(JVMTI_ENV_ARG(jvmti, &jvmti_caps));
147 JVMTI_ERROR_CHECK("SetEventCallbacks returned error", res);
148
149 res = JVMTI_ENV_PTR(jvmti)->AddCapabilities(JVMTI_ENV_ARG(jvmti, &jvmti_caps));
150 JVMTI_ERROR_CHECK("SetEventCallbacks returned error", res);
151
152 /* Enable events */
153 init_callbacks();
154 res = JVMTI_ENV_PTR(jvmti)->SetEventCallbacks(JVMTI_ENV_ARG(jvmti, &callbacks), sizeof(callbacks));
155 JVMTI_ERROR_CHECK("SetEventCallbacks returned error", res);
156
157 res = JVMTI_ENV_PTR(jvmti)->SetEventNotificationMode(JVMTI_ENV_ARG(jvmti,JVMTI_ENABLE),JVMTI_EVENT_VM_INIT,NULL);
158 JVMTI_ERROR_CHECK("SetEventNotificationMode for VM_INIT returned error", res);
159
160 res = JVMTI_ENV_PTR(jvmti)->SetEventNotificationMode(JVMTI_ENV_ARG(jvmti,JVMTI_ENABLE),JVMTI_EVENT_VM_DEATH,NULL);
161 JVMTI_ERROR_CHECK("SetEventNotificationMode for vm death event returned error", res);
162
163 res = JVMTI_ENV_PTR(jvmti)->SetEventNotificationMode(JVMTI_ENV_ARG(jvmti,JVMTI_ENABLE),JVMTI_EVENT_GARBAGE_COLLECTION_START,NULL);
164 JVMTI_ERROR_CHECK("SetEventNotificationMode for gc start returned error", res);
165
166 res = JVMTI_ENV_PTR(jvmti)->SetEventNotificationMode(JVMTI_ENV_ARG(jvmti,JVMTI_ENABLE),JVMTI_EVENT_GARBAGE_COLLECTION_FINISH,NULL);
167 JVMTI_ERROR_CHECK("SetEventNotificationMode for gc finish returned error", res);
168
169 return JNI_OK;
170 }
171
172
173
174
175 JNIEXPORT void JNICALL
176 Java_nsk_jvmti_unit_functions_ForceGarbageCollection_gc_checkGCStart(JNIEnv * env, jclass cls) {
177 if (gc_start_count == 0) {
178 printf("Error: JVMTI_EVENT_GARBAGE_COLLECTION_START count = 0\n");
179 iGlobalStatus = 2;
180 }
181 }
182
183 JNIEXPORT void JNICALL
184 Java_nsk_jvmti_unit_functions_ForceGarbageCollection_gc_checkGCFinish(JNIEnv * env, jclass cls) {
185 if (gc_finish_count == 0) {
186 printf("Error: JVMTI_EVENT_GARBAGE_COLLECTION_FINISH count = 0\n");
187 iGlobalStatus = 2;
188 }
189 }
190
191 JNIEXPORT jint JNICALL
192 Java_nsk_jvmti_unit_functions_ForceGarbageCollection_gc_GetResult(JNIEnv * env, jclass cls) {
193 return iGlobalStatus;
194 }
195
196
197 JNIEXPORT void JNICALL
198 Java_nsk_jvmti_unit_functions_ForceGarbageCollection_gc_jvmtiForceGC (JNIEnv * env, jclass cls) {
199 jvmtiError ret;
200
201 debug_printf("jvmti Force gc requested \n");
202 ret = JVMTI_ENV_PTR(jvmti)->ForceGarbageCollection(JVMTI_ENV_ARG1(jvmti));
203
204 if (ret != JVMTI_ERROR_NONE) {
205 printf("Error: ForceGarbageCollection %d \n", ret);
206 iGlobalStatus = 2;
207 }
208 }
209
210 #ifdef __cplusplus
211 }
212 #endif