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 #include "nsk_tools.h"
30 #include "JVMTITools.h"
31 #include "jvmti_tools.h"
32 #include "jni_tools.h"
33
34 extern "C" {
35
36 #define STATUS_FAILED 2
37 #define PASSED 0
38
39 #define METH_NUM 2
40
41 static const char *METHODS[] = {
42 "bpMethod",
43 "runThis"
44 };
45
46 static const char *METHOD_SIGS[] = {
47 "()V",
48 "([Ljava/lang/String;Ljava/io/PrintStream;)I"
49 };
50
51 static volatile long stepEv[] = {0, 0};
52
53 static const char *CLASS_SIG =
54 "Lnsk/jvmti/SingleStep/singlestep001;";
55
56 static volatile jint result = PASSED;
57 static jvmtiEnv *jvmti = NULL;
58 static jvmtiEventCallbacks callbacks;
59
60 static int vm_started = 0;
61 static jrawMonitorID agent_lock;
62
63 static void setBP(jvmtiEnv *jvmti_env, JNIEnv *env, jclass klass) {
64 jmethodID mid;
65
66 if (!NSK_JNI_VERIFY(env, (mid = NSK_CPP_STUB4(GetMethodID,
67 env, klass, METHODS[0], METHOD_SIGS[0])) != NULL))
68 NSK_CPP_STUB2(FatalError, env,
69 "failed to get ID for the java method\n");
70
71 if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB3(SetBreakpoint,
72 jvmti_env, mid, 0)))
73 NSK_CPP_STUB2(FatalError, env,
74 "failed to set breakpoint\n");
75 }
76
77 /** callback functions **/
78 void JNICALL
79 ClassLoad(jvmtiEnv *jvmti_env, JNIEnv *env, jthread thread, jclass klass) {
80 char *sig, *generic;
81
82 jvmti->RawMonitorEnter(agent_lock);
83
84 if (vm_started) {
85 if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB4(GetClassSignature,
86 jvmti_env, klass, &sig, &generic)))
87 NSK_CPP_STUB2(FatalError, env,
88 "failed to obtain a class signature\n");
89
90 if (sig != NULL && (strcmp(sig, CLASS_SIG) == 0)) {
91 NSK_DISPLAY1(
92 "ClassLoad event received for the class \"%s\"\n"
93 "\tsetting breakpoint ...\n",
94 sig);
95 setBP(jvmti_env, env, klass);
96 }
97 }
98
99 jvmti->RawMonitorExit(agent_lock);
100 }
101
102 void JNICALL
103 Breakpoint(jvmtiEnv *jvmti_env, JNIEnv *env, jthread thr, jmethodID method,
104 jlocation loc) {
105 jclass klass;
106 char *sig, *generic;
107
108 NSK_DISPLAY0("Breakpoint event received\n");
109 if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB3(GetMethodDeclaringClass,
110 jvmti_env, method, &klass)))
111 NSK_COMPLAIN0("TEST FAILURE: unable to get method declaring class\n\n");
112
113 if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB4(GetClassSignature,
114 jvmti_env, klass, &sig, &generic)))
115 NSK_CPP_STUB2(FatalError, env,
116 "Breakpoint: failed to obtain a class signature\n");
117
118 if (sig != NULL && (strcmp(sig, CLASS_SIG) == 0)) {
119 NSK_DISPLAY1("method declaring class \"%s\"\n\tenabling SingleStep events ...\n",
120 sig);
121 if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB4(SetEventNotificationMode,
122 jvmti_env, JVMTI_ENABLE, JVMTI_EVENT_SINGLE_STEP, thr))) {
123 result = STATUS_FAILED;
124 NSK_COMPLAIN0("TEST FAILURE: cannot enable SingleStep events\n\n");
125 }
126 } else {
127 result = STATUS_FAILED;
128 NSK_COMPLAIN1("TEST FAILURE: unexpected breakpoint event in method of class \"%s\"\n\n",
129 sig);
130 }
131 }
132
133 void JNICALL
134 SingleStep(jvmtiEnv *jvmti_env, JNIEnv* jni_env, jthread thread,
135 jmethodID method, jlocation location) {
136 jclass klass;
137 char *sig, *generic, *methNam, *methSig;
138
139 if (result == STATUS_FAILED) {
140 return;
141 }
142
143 NSK_DISPLAY0(">>>> SingleStep event received\n");
144
145 if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB5(GetMethodName,
146 jvmti_env, method, &methNam, &methSig, NULL))) {
147 result = STATUS_FAILED;
148 NSK_COMPLAIN0("TEST FAILED: unable to get method name during SingleStep callback\n\n");
149 return;
150 }
151 if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB3(GetMethodDeclaringClass,
152 jvmti_env, method, &klass))) {
153 result = STATUS_FAILED;
154 NSK_COMPLAIN0("TEST FAILED: unable to get method declaring class during SingleStep callback\n\n");
155 return;
156 }
157 if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB4(GetClassSignature,
158 jvmti_env, klass, &sig, &generic))) {
159 result = STATUS_FAILED;
160 NSK_COMPLAIN0("TEST FAILED: unable to obtain a class signature during SingleStep callback\n\n");
161 return;
162 }
163
164 if (sig != NULL) {
165 NSK_DISPLAY3(
166 "\tmethod name: \"%s\"\n"
167 "\tsignature: \"%s\"\n"
168 "\tmethod declaring class: \"%s\"\n",
169 methNam, methSig, sig);
170
171 if (stepEv[1] == 1) {
172 result = STATUS_FAILED;
173 NSK_COMPLAIN0("TEST FAILED: SingleStep event received after disabling the event generation\n\n");
174 }
175 else if ((strcmp(methNam,METHODS[0]) == 0) &&
176 (strcmp(methSig,METHOD_SIGS[0]) == 0) &&
177 (strcmp(sig,CLASS_SIG) == 0)) {
178 stepEv[0]++;
179 NSK_DISPLAY1("CHECK PASSED: SingleStep event received for the method \"%s\" as expected\n",
180 methNam);
181 }
182 else if ((strcmp(methNam,METHODS[1]) == 0) &&
183 (strcmp(methSig,METHOD_SIGS[1]) == 0) &&
184 (strcmp(sig,CLASS_SIG) == 0)) {
185 stepEv[1]++;
186 NSK_DISPLAY1(
187 "CHECK PASSED: SingleStep event received for the method \"%s\" as expected\n"
188 "\tdisabling the event generation\n",
189 methNam);
190 if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB4(SetEventNotificationMode,
191 jvmti_env, JVMTI_DISABLE, JVMTI_EVENT_SINGLE_STEP, thread))) {
192 result = STATUS_FAILED;
193 NSK_COMPLAIN0("TEST FAILED: cannot disable SingleStep events\n\n");
194 }
195 }
196 }
197
198 if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB2(Deallocate,
199 jvmti_env, (unsigned char*) methNam))) {
200 result = STATUS_FAILED;
201 NSK_COMPLAIN0("TEST FAILED: unable to deallocate memory pointed to method name\n\n");
202 }
203 if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB2(Deallocate,
204 jvmti_env, (unsigned char*) methSig))) {
205 result = STATUS_FAILED;
206 NSK_COMPLAIN0("TEST FAILED: unable to deallocate memory pointed to method signature\n\n");
207 }
208
209 NSK_DISPLAY0("<<<<\n\n");
210 }
211
212 void JNICALL
213 VMStart(jvmtiEnv *jvmti_env, JNIEnv* jni_env) {
214 jvmti->RawMonitorEnter(agent_lock);
215
216 vm_started = 1;
217
218 jvmti->RawMonitorExit(agent_lock);
219 }
220 /************************/
221
222 JNIEXPORT jint JNICALL
223 Java_nsk_jvmti_SingleStep_singlestep001_check(
224 JNIEnv *env, jobject obj) {
225 int i;
226
227 for (i=0; i<METH_NUM; i++)
228 if (stepEv[i] == 0) {
229 result = STATUS_FAILED;
230 NSK_COMPLAIN1("TEST FAILED: no SingleStep events for the method \"%s\"\n\n",
231 METHODS[i]);
232 }
233
234 return result;
235 }
236
237 #ifdef STATIC_BUILD
238 JNIEXPORT jint JNICALL Agent_OnLoad_singlestep001(JavaVM *jvm, char *options, void *reserved) {
239 return Agent_Initialize(jvm, options, reserved);
240 }
241 JNIEXPORT jint JNICALL Agent_OnAttach_singlestep001(JavaVM *jvm, char *options, void *reserved) {
242 return Agent_Initialize(jvm, options, reserved);
243 }
244 JNIEXPORT jint JNI_OnLoad_singlestep001(JavaVM *jvm, char *options, void *reserved) {
245 return JNI_VERSION_1_8;
246 }
247 #endif
248 jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) {
249 jvmtiCapabilities caps;
250
251 /* init framework and parse options */
252 if (!NSK_VERIFY(nsk_jvmti_parseOptions(options)))
253 return JNI_ERR;
254
255 /* create JVMTI environment */
256 if (!NSK_VERIFY((jvmti =
257 nsk_jvmti_createJVMTIEnv(jvm, reserved)) != NULL))
258 return JNI_ERR;
259
260 /* add capability to generate compiled method events */
261 memset(&caps, 0, sizeof(jvmtiCapabilities));
262 caps.can_generate_breakpoint_events = 1;
263 caps.can_generate_single_step_events = 1;
264 if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB2(AddCapabilities,
265 jvmti, &caps)))
266 return JNI_ERR;
267
268 if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB2(GetCapabilities,
269 jvmti, &caps)))
270 return JNI_ERR;
271
272 if (!caps.can_generate_single_step_events)
273 NSK_DISPLAY0("Warning: generation of single step events is not implemented\n");
274
275 /* set event callback */
276 NSK_DISPLAY0("setting event callbacks ...\n");
277 (void) memset(&callbacks, 0, sizeof(callbacks));
278 callbacks.ClassLoad = &ClassLoad;
279 callbacks.Breakpoint = &Breakpoint;
280 callbacks.SingleStep = &SingleStep;
281 callbacks.VMStart = &VMStart;
282 if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB3(SetEventCallbacks,
283 jvmti, &callbacks, sizeof(callbacks))))
284 return JNI_ERR;
285
286 NSK_DISPLAY0("setting event callbacks done\nenabling JVMTI events ...\n");
287 if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB4(SetEventNotificationMode,
288 jvmti, JVMTI_ENABLE, JVMTI_EVENT_VM_START, NULL)))
289 return JNI_ERR;
290 if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB4(SetEventNotificationMode,
291 jvmti, JVMTI_ENABLE, JVMTI_EVENT_CLASS_LOAD, NULL)))
292 return JNI_ERR;
293 if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB4(SetEventNotificationMode,
294 jvmti, JVMTI_ENABLE, JVMTI_EVENT_BREAKPOINT, NULL)))
295 return JNI_ERR;
296 NSK_DISPLAY0("enabling the events done\n\n");
297
298 if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB3(CreateRawMonitor,
299 jvmti, "agent lock", &agent_lock)))
300 return JNI_ERR;
301
302 return JNI_OK;
303 }
304
305 }