1 /*
2 * Copyright (c) 2004, 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 <string.h>
25 #include <stdlib.h>
26 #include "jvmti.h"
27 #include "agent_common.h"
28 #include "jni_tools.h"
29 #include "jvmti_tools.h"
30 #include "JVMTITools.h"
31 #include "nsk_list.h"
32
33 extern "C" {
34
35 /* ============================================================================= */
36
37 /* scaffold objects */
38 static jvmtiEnv *jvmti = NULL;
39 static jlong timeout = 0;
40 static jrawMonitorID syncLock = NULL;
41
42 static int methodLoadCount = 0;
43 static int methodUnloadCount = 0;
44
45 #define NAME_LENGTH 50
46 const void *plist = NULL;
47
48 typedef struct nsk_jvmti_CompiledMethodIDStruct {
49 jmethodID method;
50 const void* code_addr;
51 char name[NAME_LENGTH];
52 } nsk_jvmti_CompiledMethod;
53
54
55 /* ============================================================================= */
56
57 /* callbacks */
58 void JNICALL
59 cbCompiledMethodLoad(jvmtiEnv *jvmti_env, jmethodID method, jint code_size,
60 const void* code_addr, jint map_length,
61 const jvmtiAddrLocationMap* map, const void* compile_info) {
62 char *name;
63 char *sign;
64 char *genc;
65
66 if (!NSK_JVMTI_VERIFY(
67 NSK_CPP_STUB5(
68 GetMethodName, jvmti_env, method, &name, &sign, &genc))) {
69 nsk_jvmti_setFailStatus();
70 return;
71 }
72
73 if (!strncmp(name,"javaMethod", 8)) {
74 nsk_jvmti_CompiledMethod *rec =
75 (nsk_jvmti_CompiledMethod *)malloc(sizeof(nsk_jvmti_CompiledMethod));
76
77 rec->method = method;
78 rec->code_addr = code_addr;
79 strncpy(rec->name, name, NAME_LENGTH);
80 rec->name[NAME_LENGTH - 1] = '\0';
81
82 if (!NSK_VERIFY(nsk_list_add(plist, rec))) {
83 nsk_jvmti_setFailStatus();
84 free((void *)rec);
85 } else {
86 NSK_DISPLAY0(">>>JVMTI_EVENT_COMPILED_METHOD_LOAD received for\n");
87 NSK_DISPLAY1("\t\tmethod: %s\n", rec->name);
88
89 if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB2(RawMonitorEnter, jvmti, syncLock)))
90 nsk_jvmti_setFailStatus();
91
92 methodLoadCount++;
93
94 if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB2(RawMonitorExit, jvmti, syncLock)))
95 nsk_jvmti_setFailStatus();
96
97 }
98 }
99
100 if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB2(Deallocate,
101 jvmti_env, (unsigned char*)name))) {
102 nsk_jvmti_setFailStatus();
103 }
104 if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB2(Deallocate,
105 jvmti_env, (unsigned char*)sign))) {
106 nsk_jvmti_setFailStatus();
107 }
108 if (genc != NULL)
109 if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB2(Deallocate,
110 jvmti_env, (unsigned char*)genc))) {
111 nsk_jvmti_setFailStatus();
112 }
113 }
114
115 void JNICALL
116 cbCompiledMethodUnload(jvmtiEnv *jvmti_env, jmethodID method,
117 const void* code_addr) {
118
119 nsk_jvmti_CompiledMethod *rec;
120
121 int count = nsk_list_getCount(plist);
122 int i;
123
124 for (i = 0; i < count; i ++) {
125 rec = (nsk_jvmti_CompiledMethod *)nsk_list_get(plist, i);
126 if ((rec->code_addr == code_addr) && (rec->method == method)) {
127 NSK_DISPLAY0(">>>JVMTI_EVENT_COMPILED_METHOD_UNLOAD received for\n");
128 NSK_DISPLAY1("\t\tmethod: %s\n", rec->name);
129
130 if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB2(RawMonitorEnter, jvmti, syncLock)))
131 nsk_jvmti_setFailStatus();
132
133 methodUnloadCount++;
134
135 if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB2(RawMonitorExit, jvmti, syncLock)))
136 nsk_jvmti_setFailStatus();
137
138 free(rec);
139 nsk_list_remove(plist, i);
140 return;
141 }
142
143 }
144
145 }
146
147 /* ============================================================================= */
148
149 static int
150 enableEvent(jvmtiEventMode enable, jvmtiEvent event) {
151 if (!NSK_JVMTI_VERIFY(
152 NSK_CPP_STUB4(SetEventNotificationMode, jvmti, enable,
153 event, NULL))) {
154 nsk_jvmti_setFailStatus();
155 return NSK_FALSE;
156 }
157
158 return NSK_TRUE;
159 }
160
161 int checkEvents() {
162
163 int result = methodUnloadCount <= methodLoadCount;
164
165 if (result) {
166 NSK_DISPLAY0("Received correct number of events:\n");
167 NSK_DISPLAY1("\t\tCOMPILED_METHOD_LOAD events number = %d\n",
168 methodLoadCount);
169 NSK_DISPLAY1("\t\tCOMPILED_METHOD_UNLOAD events number = %d\n",
170 methodUnloadCount);
171 } else {
172 NSK_COMPLAIN0("Received incorrect number of events:\n");
173 NSK_COMPLAIN1("\t\tCOMPILED_METHOD_LOAD events number = %d\n",
174 methodLoadCount);
175 NSK_COMPLAIN1("\t\tCOMPILED_METHOD_UNLOAD events number = %d\n",
176 methodUnloadCount);
177 }
178
179 return result;
180 }
181
182 /* ============================================================================= */
183
184 static int
185 setCallBacks() {
186
187 jvmtiEventCallbacks eventCallbacks;
188
189 memset(&eventCallbacks, 0, sizeof(eventCallbacks));
190
191 eventCallbacks.CompiledMethodLoad = cbCompiledMethodLoad;
192 eventCallbacks.CompiledMethodUnload = cbCompiledMethodUnload;
193
194 return NSK_JVMTI_VERIFY(NSK_CPP_STUB3(SetEventCallbacks, jvmti,
195 &eventCallbacks,
196 sizeof(eventCallbacks)));
197 }
198
199 /* ============================================================================= */
200
201 /** Agent algorithm. */
202 static void JNICALL
203 agentProc(jvmtiEnv* jvmti, JNIEnv* agentJNI, void* arg) {
204
205 int i;
206
207 int attempts = nsk_jvmti_findOptionIntValue("attempts", 1);
208
209 for (i = 0; i < attempts; i++) {
210
211 if (!nsk_jvmti_waitForSync(timeout))
212 return;
213
214 if (!checkEvents())
215 nsk_jvmti_setFailStatus();
216
217 NSK_DISPLAY0("Let debuggee to continue\n");
218 if (!nsk_jvmti_resumeSync())
219 return;
220 }
221
222 {
223 int count = nsk_list_getCount(plist);
224
225 while (count > 0) {
226 free((void *)nsk_list_get(plist, 0));
227 nsk_list_remove(plist, 0);
228 count = nsk_list_getCount(plist);
229 }
230
231 }
232
233 if (!NSK_JVMTI_VERIFY(
234 NSK_CPP_STUB2(DestroyRawMonitor, jvmti, syncLock)))
235 nsk_jvmti_setFailStatus();
236
237 }
238
239 /* ============================================================================= */
240
241 /** Agent library initialization. */
242 #ifdef STATIC_BUILD
243 JNIEXPORT jint JNICALL Agent_OnLoad_em07t002(JavaVM *jvm, char *options, void *reserved) {
244 return Agent_Initialize(jvm, options, reserved);
245 }
246 JNIEXPORT jint JNICALL Agent_OnAttach_em07t002(JavaVM *jvm, char *options, void *reserved) {
247 return Agent_Initialize(jvm, options, reserved);
248 }
249 JNIEXPORT jint JNI_OnLoad_em07t002(JavaVM *jvm, char *options, void *reserved) {
250 return JNI_VERSION_1_8;
251 }
252 #endif
253 jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) {
254
255 if (!NSK_VERIFY(nsk_jvmti_parseOptions(options)))
256 return JNI_ERR;
257
258 timeout = nsk_jvmti_getWaitTime() * 60 * 1000;
259
260 if (!NSK_VERIFY((jvmti = nsk_jvmti_createJVMTIEnv(jvm, reserved)) != NULL))
261 return JNI_ERR;
262
263 if (!NSK_JVMTI_VERIFY(
264 NSK_CPP_STUB3(CreateRawMonitor, jvmti, "_syncLock", &syncLock))) {
265 nsk_jvmti_setFailStatus();
266 return JNI_ERR;
267 }
268
269 if (!NSK_VERIFY((plist = (const void *)nsk_list_create()) != NULL))
270 return JNI_ERR;
271
272 {
273 jvmtiCapabilities caps;
274 memset(&caps, 0, sizeof(caps));
275
276 caps.can_generate_compiled_method_load_events = 1;
277 if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB2(AddCapabilities, jvmti, &caps)))
278 return JNI_ERR;
279 }
280
281 if (!setCallBacks()) {
282 return JNI_ERR;
283 }
284
285 if (!enableEvent(JVMTI_ENABLE, JVMTI_EVENT_COMPILED_METHOD_LOAD) ||
286 !enableEvent(JVMTI_ENABLE, JVMTI_EVENT_COMPILED_METHOD_UNLOAD)) {
287 return JNI_ERR;
288 }
289
290 if (!NSK_VERIFY(nsk_jvmti_setAgentProc(agentProc, NULL)))
291 return JNI_ERR;
292
293 return JNI_OK;
294 }
295
296 /* ============================================================================= */
297
298
299 }