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 /*
25 */
26
27 #include <stdio.h>
28 #include <string.h>
29 #include "jvmti.h"
30 #include "jni_tools.h"
31 #include "agent_common.h"
32 #include "JVMTITools.h"
33
34 #ifdef __cplusplus
35 extern "C" {
36 #endif
37
38 #ifndef JNI_ENV_ARG
39
40 #ifdef __cplusplus
41 #define JNI_ENV_ARG(x, y) y
42 #define JNI_ENV_PTR(x) x
43 #else
44 #define JNI_ENV_ARG(x,y) x, y
45 #define JNI_ENV_PTR(x) (*x)
46 #endif
47
48 #endif
49
50 #define PASSED 0
51 #define STATUS_FAILED 2
52
53 static jvmtiEnv *jvmti = NULL;
54 static jvmtiCapabilities caps;
55 static jint result = PASSED;
56 static jboolean printdump = JNI_FALSE;
57 static jmethodID mid = NULL;
58
59 void print_LocalVariableEntry(jvmtiLocalVariableEntry *lvt_elem) {
60 printf("\n Var name: %s, slot: %d", lvt_elem->name, lvt_elem->slot);
61 printf(", start_bci: %" LL "d", lvt_elem->start_location);
62 printf(", end_bci: %" LL "d", lvt_elem->start_location + lvt_elem->length);
63 printf(", signature: %s\n", lvt_elem->signature);
64 }
65
66 #ifdef STATIC_BUILD
67 JNIEXPORT jint JNICALL Agent_OnLoad_getlocal004(JavaVM *jvm, char *options, void *reserved) {
68 return Agent_Initialize(jvm, options, reserved);
69 }
70 JNIEXPORT jint JNICALL Agent_OnAttach_getlocal004(JavaVM *jvm, char *options, void *reserved) {
71 return Agent_Initialize(jvm, options, reserved);
72 }
73 JNIEXPORT jint JNI_OnLoad_getlocal004(JavaVM *jvm, char *options, void *reserved) {
74 return JNI_VERSION_1_8;
75 }
76 #endif
77 jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) {
78 jint res;
79 jvmtiError err;
80
81 if (options != NULL && strcmp(options, "printdump") == 0) {
82 printdump = JNI_TRUE;
83 }
84
85 res = JNI_ENV_PTR(jvm)->GetEnv(JNI_ENV_ARG(jvm, (void **) &jvmti),
86 JVMTI_VERSION_1_1);
87 if (res != JNI_OK || jvmti == NULL) {
88 printf("Wrong result of a valid call to GetEnv!\n");
89 return JNI_ERR;
90 }
91
92 err = jvmti->GetPotentialCapabilities(&caps);
93 if (err != JVMTI_ERROR_NONE) {
94 printf("(GetPotentialCapabilities) unexpected error: %s (%d)\n",
95 TranslateError(err), err);
96 return JNI_ERR;
97 }
98
99 err = jvmti->AddCapabilities(&caps);
100 if (err != JVMTI_ERROR_NONE) {
101 printf("(AddCapabilities) unexpected error: %s (%d)\n",
102 TranslateError(err), err);
103 return JNI_ERR;
104 }
105
106 err = jvmti->GetCapabilities(&caps);
107 if (err != JVMTI_ERROR_NONE) {
108 printf("(GetCapabilities) unexpected error: %s (%d)\n",
109 TranslateError(err), err);
110 return JNI_ERR;
111 }
112
113 if (!caps.can_access_local_variables) {
114 printf("Warning: Access to local variables is not implemented\n");
115 }
116
117 return JNI_OK;
118 }
119
120 JNIEXPORT void JNICALL
121 Java_nsk_jvmti_unit_GetLocalVariable_getlocal004_getMeth(JNIEnv *env, jclass cls) {
122 if (jvmti == NULL) {
123 printf("JVMTI client was not properly loaded!\n");
124 result = STATUS_FAILED;
125 return;
126 }
127
128 if (!caps.can_access_local_variables ||
129 !caps.can_generate_method_exit_events) return;
130
131 mid = JNI_ENV_PTR(env)->GetStaticMethodID(JNI_ENV_ARG(env, cls),
132 "staticMeth", "(I)I");
133 if (mid == NULL) {
134 printf("Cannot find Method ID for staticMeth\n");
135 result = STATUS_FAILED;
136 return;
137 }
138
139 fflush(stdout);
140 }
141
142 void checkErrorCodeIn(jvmtiError err, jint slot) {
143 if (err != JVMTI_ERROR_NONE) {
144 printf(" FAILURE: JVMTI_ERROR_NONE is expected, slot: %d\n\n", slot);
145 result = STATUS_FAILED;
146 } else {
147 printf(" success: JVMTI_ERROR_NONE as expected, slot: %d\n\n", slot);
148 }
149 }
150
151 void checkErrorCodeOut(jvmtiError err, jint slot) {
152 if (err != JVMTI_ERROR_INVALID_SLOT) {
153 printf(" FAILURE: JVMTI_ERROR_INVALID_SLOT is expected, slot: %d\n\n", slot);
154 result = STATUS_FAILED;
155 } else {
156 printf(" success: JVMTI_ERROR_INVALID_SLOT as expected, slot: %d\n\n", slot);
157 }
158 }
159
160 #define CHECK_ERROR_CODE(scope_no, err, slot) \
161 if (scope_no == 1) { \
162 checkErrorCodeOut(err, slot); \
163 } else { \
164 checkErrorCodeIn(err, slot); \
165 }
166
167 JNIEXPORT void JNICALL
168 Java_nsk_jvmti_unit_GetLocalVariable_getlocal004_checkLoc(JNIEnv *env,
169 jclass cls, jthread thr, jint scope_no) {
170 jvmtiError err = JVMTI_ERROR_NONE;
171 jint slot = 0;
172 jint locInt = 0;
173 jlong locLong = 0L;
174 jdouble locDouble = 0.0f;
175
176 if (jvmti == NULL) {
177 return;
178 }
179 printf("\n ----------------- checkLoc: %d -----------------\n\n", scope_no);
180
181 /* Check for slots which has to be available in general */
182 for (slot = 3; slot < 5; slot++) {
183 err = jvmti->GetLocalInt(thr, 1, slot, &locInt);
184 printf(" GetLocalInt: %s (%d)\n", TranslateError(err), err);
185 CHECK_ERROR_CODE(scope_no, err, slot);
186
187 if (err == JVMTI_ERROR_NONE) {
188 printf(" slot%d: %d\n", slot, locInt);
189 }
190
191 err = jvmti->GetLocalLong(thr, 1, slot, &locLong);
192 printf(" GetLocalLong: %s (%d)\n", TranslateError(err), err);
193 CHECK_ERROR_CODE(scope_no, err, slot);
194
195 err = jvmti->GetLocalDouble(thr, 1, slot, &locDouble);
196 printf(" GetLocalDouble: %s (%d)\n", TranslateError(err), err);
197 CHECK_ERROR_CODE(scope_no, err, slot);
198 }
199
200 /* Slot 5 is special: it's not for 64 bit values! */
201 slot = 5; {
202 err = jvmti->GetLocalInt(thr, 1, slot, &locInt);
203 printf(" GetLocalInt: %s (%d)\n", TranslateError(err), err);
204 CHECK_ERROR_CODE(scope_no, err, slot);
205
206 if (err == JVMTI_ERROR_NONE) {
207 printf(" slot%d: %d\n", slot, locInt);
208 }
209
210 err = jvmti->GetLocalLong(thr, 1, slot, &locLong);
211 printf(" GetLocalLong: %s (%d)\n", TranslateError(err), err);
212 checkErrorCodeOut(err, slot);
213
214 err = jvmti->GetLocalDouble(thr, 1, slot, &locDouble);
215 printf(" GetLocalDouble: %s (%d)\n", TranslateError(err), err);
216 checkErrorCodeOut(err, slot);
217 }
218
219 /* Check for slots which has to be unavailable in general */
220 for (slot = 6; slot < 8; slot++) {
221 err = jvmti->GetLocalInt(thr, 1, slot, &locInt);
222 printf(" GetLocalInt: %s (%d)\n", TranslateError(err), err);
223 checkErrorCodeOut(err, slot);
224
225 if (err == JVMTI_ERROR_NONE) {
226 printf(" slot%d: %d\n", slot, locInt);
227 }
228
229 err = jvmti->GetLocalLong(thr, 1, slot, &locLong);
230 printf(" GetLocalLong: %s (%d)\n", TranslateError(err), err);
231 checkErrorCodeOut(err, slot);
232
233 err = jvmti->GetLocalDouble(thr, 1, slot, &locDouble);
234 printf(" GetLocalDouble: %s (%d)\n", TranslateError(err), err);
235 checkErrorCodeOut(err, slot);
236 }
237
238 fflush(stdout);
239 }
240
241 JNIEXPORT jint JNICALL
242 Java_nsk_jvmti_unit_GetLocalVariable_getlocal004_getRes(JNIEnv *env, jclass cls) {
243 return result;
244 }
245
246 #ifdef __cplusplus
247 }
248 #endif