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 #include "JVMTITools.h"
29
30 extern "C" {
31
32
33 #define PASSED 0
34 #define STATUS_FAILED 2
35
36 static JavaVM *jvm_ins;
37 static jvmtiEnv *jvmti = NULL;
38 static jvmtiEventCallbacks callbacks;
39 static jint result = PASSED;
40 static jboolean printdump = JNI_FALSE;
41 static jboolean agent_was_started = JNI_FALSE;
42 static jboolean done = JNI_FALSE;
43
44
jthr(JNIEnv * env)45 jthread jthr(JNIEnv *env) {
46 jclass thrClass;
47 jmethodID cid;
48 jthread res;
49
50 thrClass = env->FindClass("java/lang/Thread");
51 cid = env->GetMethodID(thrClass, "<init>", "()V");
52 res = env->NewObject(thrClass, cid);
53 return res;
54 }
55
agent_start(jvmtiEnv * jvmti_env,JNIEnv * jni_env,void * p)56 void JNICALL agent_start(jvmtiEnv* jvmti_env, JNIEnv* jni_env, void *p) {
57 JNIEnv *env;
58
59 if (jvmti_env != jvmti) {
60 printf("(agent_start) JVMTI envs don't match\n");
61 result = STATUS_FAILED;
62 }
63
64 jvm_ins->GetEnv((void **) &env, JNI_VERSION_1_2);
65 if (jni_env != env) {
66 printf("(agent_start) JNI envs don't match\n");
67 result = STATUS_FAILED;
68 }
69
70 if ((size_t)p != 12345) {
71 printf("(agent_start) args don't match\n");
72 result = STATUS_FAILED;
73 }
74 done = JNI_TRUE;
75 }
76
77
78
vm_init(jvmtiEnv * jvmti_env,JNIEnv * env,jthread thread)79 void JNICALL vm_init(jvmtiEnv* jvmti_env, JNIEnv *env, jthread thread) {
80 jvmtiError err;
81
82 if (!agent_was_started) {
83 agent_was_started = JNI_TRUE;
84
85 err = jvmti->RunAgentThread(jthr(env), agent_start,
86 (void *)999, JVMTI_THREAD_MAX_PRIORITY+1);
87 if (err != JVMTI_ERROR_INVALID_PRIORITY) {
88 printf("(RunAgentThread#1) expected JVMTI_ERROR_INVALID_PRIORITY got error: %s (%d)\n",
89 TranslateError(err), err);
90 result = STATUS_FAILED;
91 }
92 err = jvmti->RunAgentThread(jthr(env), agent_start,
93 (void *)999, JVMTI_THREAD_MIN_PRIORITY-1);
94 if (err != JVMTI_ERROR_INVALID_PRIORITY) {
95 printf("(RunAgentThread#1) expected JVMTI_ERROR_INVALID_PRIORITY got error: %s (%d)\n",
96 TranslateError(err), err);
97 result = STATUS_FAILED;
98 }
99 err = jvmti->RunAgentThread(jthr(env), agent_start,
100 (void *)12345, JVMTI_THREAD_NORM_PRIORITY);
101 if (err != JVMTI_ERROR_NONE) {
102 printf("(RunAgentThread#2) unexpected error: %s (%d)\n",
103 TranslateError(err), err);
104 result = STATUS_FAILED;
105 }
106 }
107 }
108
109 #ifdef STATIC_BUILD
Agent_OnLoad_agentthr(JavaVM * jvm,char * options,void * reserved)110 JNIEXPORT jint JNICALL Agent_OnLoad_agentthr(JavaVM *jvm, char *options, void *reserved) {
111 return Agent_Initialize(jvm, options, reserved);
112 }
Agent_OnAttach_agentthr(JavaVM * jvm,char * options,void * reserved)113 JNIEXPORT jint JNICALL Agent_OnAttach_agentthr(JavaVM *jvm, char *options, void *reserved) {
114 return Agent_Initialize(jvm, options, reserved);
115 }
JNI_OnLoad_agentthr(JavaVM * jvm,char * options,void * reserved)116 JNIEXPORT jint JNI_OnLoad_agentthr(JavaVM *jvm, char *options, void *reserved) {
117 return JNI_VERSION_1_8;
118 }
119 #endif
Agent_Initialize(JavaVM * jvm,char * options,void * reserved)120 jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) {
121 jvmtiError err;
122 jint res;
123
124 if (options != NULL && strcmp(options, "printdump") == 0) {
125 printdump = JNI_TRUE;
126 }
127
128 jvm_ins = jvm;
129 res = jvm->GetEnv((void **) &jvmti, JVMTI_VERSION_1_1);
130 if (res != JNI_OK || jvmti == NULL) {
131 printf("Wrong result of a valid call to GetEnv!\n");
132 return JNI_ERR;
133 }
134
135 callbacks.VMInit = &vm_init;
136 err = jvmti->SetEventCallbacks(&callbacks, sizeof(callbacks));
137 if (err != JVMTI_ERROR_NONE) {
138 printf("(SetEventCallbacks) unexpected error: %s (%d)\n",
139 TranslateError(err), err);
140 return JNI_ERR;
141 }
142
143 err = jvmti->SetEventNotificationMode(JVMTI_ENABLE, JVMTI_EVENT_VM_INIT, NULL);
144 if (err != JVMTI_ERROR_NONE) {
145 printf("Failed to enable JVMTI_EVENT_THREAD_START: %s (%d)\n",
146 TranslateError(err), err);
147 return JNI_ERR;
148 }
149
150 return JNI_OK;
151 }
152
153 JNIEXPORT jboolean JNICALL
Java_nsk_jvmti_unit_agentthr_isOver(JNIEnv * env,jclass cls)154 Java_nsk_jvmti_unit_agentthr_isOver(JNIEnv *env, jclass cls) {
155 return done;
156 }
157
158 JNIEXPORT jint JNICALL
Java_nsk_jvmti_unit_agentthr_getRes(JNIEnv * env,jclass cls)159 Java_nsk_jvmti_unit_agentthr_getRes(JNIEnv *env, jclass cls) {
160 if (!done) {
161 printf("agent thread has not completed\n");
162 result = STATUS_FAILED;
163 }
164 return result;
165 }
166
167 }
168