1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
|
/**
* $Id$
*
* Copyright (C) 2013 Konstantin Mosesov
*
* This file is part of Kamailio, a free SIP server.
*
* This file is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version
*
*
* This file is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include <libgen.h>
#include "../../str.h"
#include "../../sr_module.h"
#include <jni.h>
#include "global.h"
#include "utils.h"
#include "java_mod.h"
#include "java_iface.h"
#include "java_support.h"
static char *_append_exception_trace_messages(char *msg_str, jthrowable a_exception, jmethodID a_mid_throwable_getCause, jmethodID a_mid_throwable_getStackTrace, jmethodID a_mid_throwable_toString, jmethodID a_mid_frame_toString)
{
jobjectArray frames;
jsize frames_length, i;
jstring msg_obj;
jobject frame;
jthrowable cause;
jclass exClass;
jmethodID mid;
jboolean isCopy;
const char *tmpbuf;
// Get the array of StackTraceElements.
frames = (jobjectArray) (*env)->CallObjectMethod(env, a_exception, a_mid_throwable_getStackTrace);
if (!frames)
{
exClass = (*env)->GetObjectClass(env, a_exception);
mid = (*env)->GetMethodID(env, exClass, "toString", "()Ljava/lang/String;");
msg_obj = (jstring) (*env)->CallObjectMethod(env, a_exception, mid);
isCopy = JNI_FALSE;
tmpbuf = (*env)->GetStringUTFChars(env, msg_obj, &isCopy);
strcat(msg_str, tmpbuf);
strcat(msg_str, "\n <<No stacktrace available>>");
(*env)->ReleaseStringUTFChars(env, msg_obj, tmpbuf);
(*env)->DeleteLocalRef(env, msg_obj);
return msg_str;
}
else
{
frames_length = (*env)->GetArrayLength(env, frames);
}
// Add Throwable.toString() before descending stack trace messages.
if (frames != 0)
{
msg_obj = (jstring) (*env)->CallObjectMethod(env, a_exception, a_mid_throwable_toString);
tmpbuf = (*env)->GetStringUTFChars(env, msg_obj, 0);
strcat(msg_str, "Exception in thread \"main\" ");
strcat(msg_str, tmpbuf);
(*env)->ReleaseStringUTFChars(env, msg_obj, tmpbuf);
(*env)->DeleteLocalRef(env, msg_obj);
}
// Append stack trace messages if there are any.
if (frames_length > 0)
{
for (i=0; i<frames_length; i++)
{
// Get the string returned from the 'toString()'
// method of the next frame and append it to
// the error message.
frame = (*env)->GetObjectArrayElement(env, frames, i);
msg_obj = (jstring) (*env)->CallObjectMethod(env, frame, a_mid_frame_toString);
tmpbuf = (*env)->GetStringUTFChars(env, msg_obj, 0);
strcat(msg_str, "\n at ");
strcat(msg_str, tmpbuf);
(*env)->ReleaseStringUTFChars(env, msg_obj, tmpbuf);
(*env)->DeleteLocalRef(env, msg_obj);
(*env)->DeleteLocalRef(env, frame);
}
}
else
{
strcat(msg_str, "\n <<No stacktrace available>>");
}
// If 'a_exception' has a cause then append the
// stack trace messages from the cause.
if (frames != 0)
{
cause = (jthrowable) (*env)->CallObjectMethod(env, a_exception, a_mid_throwable_getCause);
if (cause != 0)
{
tmpbuf = _append_exception_trace_messages(msg_str, cause, a_mid_throwable_getCause, a_mid_throwable_getStackTrace, a_mid_throwable_toString, a_mid_frame_toString);
strcat(msg_str, tmpbuf);
}
}
if (msg_str != NULL)
return strdup(msg_str);
else
return NULL;
}
void handle_exception(void)
{
char *error_msg = NULL;
char msg_str[8192];
jthrowable exception;
jclass throwable_class, frame_class;
jmethodID mid_throwable_getCause, mid_throwable_getStackTrace;
jmethodID mid_throwable_toString, mid_frame_toString;
if (!(*env)->ExceptionCheck(env))
return;
memset(&msg_str, 0, sizeof(msg_str));
// Get the exception and clear as no
// JNI calls can be made while an exception exists.
exception = (*env)->ExceptionOccurred(env);
if (exception)
{
// (*env)->ExceptionDescribe(env);
(*env)->ExceptionClear(env);
throwable_class = (*env)->FindClass(env, "java/lang/Throwable");
mid_throwable_getCause = (*env)->GetMethodID(env, throwable_class, "getCause", "()Ljava/lang/Throwable;");
mid_throwable_getStackTrace = (*env)->GetMethodID(env, throwable_class, "getStackTrace", "()[Ljava/lang/StackTraceElement;");
mid_throwable_toString = (*env)->GetMethodID(env, throwable_class, "toString", "()Ljava/lang/String;");
frame_class = (*env)->FindClass(env, "java/lang/StackTraceElement");
mid_frame_toString = (*env)->GetMethodID(env, frame_class, "toString", "()Ljava/lang/String;");
error_msg = _append_exception_trace_messages(msg_str, exception, mid_throwable_getCause, mid_throwable_getStackTrace, mid_throwable_toString, mid_frame_toString);
(*env)->DeleteLocalRef(env, exception);
}
LM_ERR("%s: Exception:\n%s\n", APP_NAME, error_msg == NULL ? "(no info)" : error_msg);
}
void ThrowNewException(JNIEnv *env, char *fmt, ...)
{
va_list ap;
char buf[1024];
memset(buf, 0, sizeof(char));
va_start(ap, fmt);
vsnprintf(buf, 1024, fmt, ap);
va_end(ap);
(*env)->ThrowNew(env, (*env)->FindClass(env, "java/lang/Exception"), buf);
}
void handle_VM_init_failure(int res)
{
switch(res)
{
case -1:
LM_ERR("%s: Couldn't initialize Java VM: unknown error\n", APP_NAME);
break;
case -2:
LM_ERR("%s: Couldn't initialize Java VM: thread detached from the VM\n", APP_NAME);
break;
case -3:
LM_ERR("%s: Couldn't initialize Java VM: JNI version error\n", APP_NAME);
break;
case -4:
LM_ERR("%s: Couldn't initialize Java VM: not enough memory\n", APP_NAME);
break;
case -5:
LM_ERR("%s: Couldn't initialize Java VM: VM already created\n", APP_NAME);
break;
case -6:
LM_ERR("%s: Couldn't initialize Java VM: invalid arguments\n", APP_NAME);
break;
default:
LM_ERR("%s: Couldn't initialize Java VM. Error code: %d\n", APP_NAME, res);
break;
}
}
|
