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 <stdlib.h>
26 #include <string.h>
27 #include "jvmti.h"
28 #include "agent_common.h"
29
30 extern "C" {
31
32 #define JVMTI_ERROR_CHECK(str,res) if ( res != JVMTI_ERROR_NONE) { printf(str); printf("%d\n",res); return res;}
33 #define JVMTI_ERROR_CHECK_EXPECTED_ERROR(str,res,err) if ( res != err) { printf(str); printf("unexpected error %d\n",res); return res;}
34
35 #define JVMTI_ERROR_CHECK_VOID(str,res) if ( res != JVMTI_ERROR_NONE) { printf(str); printf("%d\n",res); iGlobalStatus = 2; }
36
37 #define JVMTI_ERROR_CHECK_EXPECTED_ERROR_VOID(str,res,err) if ( res != err) { printf(str); printf("unexpected error %d\n",res); iGlobalStatus = 2; }
38
39 static jvmtiEnv *jvmti;
40 static jint iGlobalStatus = 0;
41 static jvmtiCapabilities jvmti_caps;
42 static jvmtiEventCallbacks callbacks;
43 static int boot_class_count = 0;
44
45 static const char* BOOT_CLASS =
46 "nsk/jvmti/unit/functions/AddToBootstrapClassLoaderSearch/Boot";
47
48 static const char* CLASSPATH = "java.class.path";
49
50 static char segment[3000] = ".";
51
52 int printdump = 0;
53
54
55 void debug_printf(const char *fmt, ...) {
56 va_list args;
57
58 va_start(args, fmt);
59 if (printdump) {
60 vprintf(fmt, args);
61 }
62 va_end(args);
63 }
64
65
66 /*
67 * Check that it is not possible to add to the boot class path during the Start phase
68 */
69 void JNICALL
70 vmStart(jvmtiEnv *jvmti, JNIEnv* jni) {
71 jvmtiError res;
72
73 debug_printf("VMStart event done\n");
74
75 res = jvmti->AddToBootstrapClassLoaderSearch(segment);
76 JVMTI_ERROR_CHECK_EXPECTED_ERROR_VOID("VMStart: AddToBootstrapClassLoaderSearch returned error ",
77 res, JVMTI_ERROR_WRONG_PHASE);
78 }
79
80 /*
81 * Check that it is possible to add to the boot class path before VMDeath event return.
82 */
83 void JNICALL
84 vmDeath(jvmtiEnv *jvmti, JNIEnv* jni) {
85 jvmtiError res;
86
87 debug_printf("VMDeath event done\n");
88
89 res = jvmti->AddToBootstrapClassLoaderSearch(segment);
90 /* In the live phase, anything other than an existing JAR file is an invalid path.
91 So, check that JVMTI_ERROR_ILLEGAL_ARGUMENT error is thrown.
92 */
93 JVMTI_ERROR_CHECK_EXPECTED_ERROR_VOID("VMDeath: AddToBootstrapClassLoaderSearch returned error ",
94 res, JVMTI_ERROR_ILLEGAL_ARGUMENT);
95 }
96
97 /*
98 * Check that it is possible to add to the boot class path during the Live phase
99 */
100 void JNICALL vmInit(jvmtiEnv *jvmti_env, JNIEnv *env, jthread thread) {
101 jvmtiError res;
102
103 debug_printf("VMInit event done\n");
104
105 res = jvmti->AddToBootstrapClassLoaderSearch(segment);
106 /* In the live phase, anything other than an existing JAR file is an invalid path.
107 So, check that JVMTI_ERROR_ILLEGAL_ARGUMENT error is thrown.
108 */
109 JVMTI_ERROR_CHECK_EXPECTED_ERROR_VOID("VMInit: AddToBootstrapClassLoaderSearch returned error ",
110 res, JVMTI_ERROR_ILLEGAL_ARGUMENT);
111 }
112
113 /*
114 * Check that it is not possible to add to the boot class path during the Primordial phase
115 */
116 void JNICALL
117 NativeMethodBind(jvmtiEnv* jvmti, JNIEnv *jni,
118 jthread thread, jmethodID method,
119 void* address, void** new_address_ptr) {
120 jvmtiPhase phase;
121 jvmtiError res;
122
123 res = jvmti->GetPhase(&phase);
124 JVMTI_ERROR_CHECK_VOID("GetPhase returned error", res);
125
126 if (phase == JVMTI_PHASE_PRIMORDIAL) {
127 debug_printf("Primordial phase\n");
128
129 res = jvmti->AddToBootstrapClassLoaderSearch(segment);
130 JVMTI_ERROR_CHECK_EXPECTED_ERROR_VOID("Primordial: AddToBootstrapClassLoaderSearch returned error ",
131 res, JVMTI_ERROR_WRONG_PHASE);
132 }
133 }
134
135
136 void JNICALL
137 classFileLoadEvent(jvmtiEnv *jvmti_env, JNIEnv *env,
138 jclass redefined_class,
139 jobject loader,const char* name,
140 jobject protection_domain,
141 jint class_data_len,
142 const unsigned char* class_data,
143 jint* new_class_data_len,
144 unsigned char** new_class_data) {
145
146 if (name != NULL && (strcmp(name, BOOT_CLASS) == 0)) {
147 debug_printf("Received class file load hook event for class: \n\t%s\n",
148 name);
149 debug_printf("Received class loader: 0x%p \n", loader);
150 /* Check to make sure Boot class got loaded from bootstrap class path.*/
151
152 if (loader == NULL) {
153 boot_class_count++;
154 }
155 }
156 }
157
158
159 void init_callbacks() {
160 memset((void *)&callbacks, 0, sizeof(jvmtiEventCallbacks));
161
162 callbacks.VMInit = vmInit;
163 callbacks.VMStart = vmStart;
164 callbacks.VMDeath = vmDeath;
165 callbacks.NativeMethodBind = NativeMethodBind;
166 callbacks.ClassFileLoadHook = classFileLoadEvent;
167 }
168
169
170 #ifdef STATIC_BUILD
171 JNIEXPORT jint JNICALL Agent_OnLoad_JvmtiTest(JavaVM *jvm, char *options, void *reserved) {
172 return Agent_Initialize(jvm, options, reserved);
173 }
174 JNIEXPORT jint JNICALL Agent_OnAttach_JvmtiTest(JavaVM *jvm, char *options, void *reserved) {
175 return Agent_Initialize(jvm, options, reserved);
176 }
177 JNIEXPORT jint JNI_OnLoad_JvmtiTest(JavaVM *jvm, char *options, void *reserved) {
178 return JNI_VERSION_1_8;
179 }
180 #endif
181 jint Agent_Initialize(JavaVM * jvm, char *options, void *reserved) {
182 jint res;
183 char *idx;
184
185 debug_printf("Agent_OnLoad event done\n");
186
187 if (options && strlen(options) > 0) {
188 if (strstr(options, "printdump")) {
189 printdump = 1;
190 }
191
192 strncpy(segment, options, (size_t) sizeof(segment)/sizeof(char));
193 segment[(size_t) sizeof(segment)/sizeof(char) - 1] = 0;
194 idx = strchr(segment, ',');
195 if (idx != NULL) *idx = 0;
196 }
197
198 res = jvm->GetEnv((void **) &jvmti, JVMTI_VERSION_1_1);
199 if (res < 0) {
200 printf("Wrong result of a valid call to GetEnv!\n");
201 return JNI_ERR;
202 }
203
204 /* Add capabilities */
205 res = jvmti->GetPotentialCapabilities(&jvmti_caps);
206 JVMTI_ERROR_CHECK("GetPotentialCapabilities returned error", res);
207
208 res = jvmti->AddCapabilities(&jvmti_caps);
209 JVMTI_ERROR_CHECK("GetAddCapabilities returned error", res);
210
211
212 /* Enable events */
213 init_callbacks();
214 res = jvmti->SetEventCallbacks(&callbacks, sizeof(callbacks));
215 JVMTI_ERROR_CHECK("SetEventCallbacks returned error", res);
216
217 res = jvmti->SetEventNotificationMode(JVMTI_ENABLE, JVMTI_EVENT_VM_START, NULL);
218 JVMTI_ERROR_CHECK("SetEventNotificationMode for VM_START returned error", res);
219
220 res = jvmti->SetEventNotificationMode(JVMTI_ENABLE, JVMTI_EVENT_VM_INIT, NULL);
221 JVMTI_ERROR_CHECK("SetEventNotificationMode for VM_INIT returned error", res);
222
223 res = jvmti->SetEventNotificationMode(JVMTI_ENABLE, JVMTI_EVENT_NATIVE_METHOD_BIND, NULL);
224 JVMTI_ERROR_CHECK("SetEventNotificationMode for NATIVE_METHOD_BIND returned error", res);
225
226 res = jvmti->SetEventNotificationMode(JVMTI_ENABLE, JVMTI_EVENT_VM_DEATH, NULL);
227 JVMTI_ERROR_CHECK("SetEventNotificationMode for VM_DEATH returned error", res);
228
229 res = jvmti->SetEventNotificationMode(JVMTI_ENABLE, JVMTI_EVENT_CLASS_FILE_LOAD_HOOK, NULL);
230 JVMTI_ERROR_CHECK("SetEventNotificationMode CLASS_FILE_LOAD_HOOK returned error", res);
231
232 strcat(segment, "/newclass");
233 debug_printf("segment=%s\n", segment);
234 res = jvmti->AddToBootstrapClassLoaderSearch(segment);
235 JVMTI_ERROR_CHECK("AddToBootStrapClassLoaderSearch returned error", res);
236
237 return JNI_OK;
238 }
239
240 JNIEXPORT jint JNICALL
241 Java_nsk_jvmti_unit_functions_AddToBootstrapClassLoaderSearch_JvmtiTest_GetResult(JNIEnv * env, jclass cls) {
242
243 if (boot_class_count != 1) {
244 printf("Error: no ClassFileLoadHook event for Boot class loaded from bootstrap class path\n");
245 iGlobalStatus = 2;
246 }
247 return iGlobalStatus;
248 }
249
250
251 }