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
|
#include <sys/types.h>
#include <stdio.h>
#include <string.h>
#include "util.h"
#include "debug.h"
#include "symbol.h"
#include "demangle-java.h"
#include "sane_ctype.h"
enum {
MODE_PREFIX = 0,
MODE_CLASS = 1,
MODE_FUNC = 2,
MODE_TYPE = 3,
MODE_CTYPE = 3, /* class arg */
};
#define BASE_ENT(c, n) [c - 'A']=n
static const char *base_types['Z' - 'A' + 1] = {
BASE_ENT('B', "byte" ),
BASE_ENT('C', "char" ),
BASE_ENT('D', "double" ),
BASE_ENT('F', "float" ),
BASE_ENT('I', "int" ),
BASE_ENT('J', "long" ),
BASE_ENT('S', "short" ),
BASE_ENT('Z', "bool" ),
};
/*
* demangle Java symbol between str and end positions and stores
* up to maxlen characters into buf. The parser starts in mode.
*
* Use MODE_PREFIX to process entire prototype till end position
* Use MODE_TYPE to process return type if str starts on return type char
*
* Return:
* success: buf
* error : NULL
*/
static char *
__demangle_java_sym(const char *str, const char *end, char *buf, int maxlen, int mode)
{
int rlen = 0;
int array = 0;
int narg = 0;
const char *q;
if (!end)
end = str + strlen(str);
for (q = str; q != end; q++) {
if (rlen == (maxlen - 1))
break;
switch (*q) {
case 'L':
if (mode == MODE_PREFIX || mode == MODE_CTYPE) {
if (mode == MODE_CTYPE) {
if (narg)
rlen += scnprintf(buf + rlen, maxlen - rlen, ", ");
narg++;
}
rlen += scnprintf(buf + rlen, maxlen - rlen, "class ");
if (mode == MODE_PREFIX)
mode = MODE_CLASS;
} else
buf[rlen++] = *q;
break;
case 'B':
case 'C':
case 'D':
case 'F':
case 'I':
case 'J':
case 'S':
case 'Z':
if (mode == MODE_TYPE) {
if (narg)
rlen += scnprintf(buf + rlen, maxlen - rlen, ", ");
rlen += scnprintf(buf + rlen, maxlen - rlen, "%s", base_types[*q - 'A']);
while (array--)
rlen += scnprintf(buf + rlen, maxlen - rlen, "[]");
array = 0;
narg++;
} else
buf[rlen++] = *q;
break;
case 'V':
if (mode == MODE_TYPE) {
rlen += scnprintf(buf + rlen, maxlen - rlen, "void");
while (array--)
rlen += scnprintf(buf + rlen, maxlen - rlen, "[]");
array = 0;
} else
buf[rlen++] = *q;
break;
case '[':
if (mode != MODE_TYPE)
goto error;
array++;
break;
case '(':
if (mode != MODE_FUNC)
goto error;
buf[rlen++] = *q;
mode = MODE_TYPE;
break;
case ')':
if (mode != MODE_TYPE)
goto error;
buf[rlen++] = *q;
narg = 0;
break;
case ';':
if (mode != MODE_CLASS && mode != MODE_CTYPE)
goto error;
/* safe because at least one other char to process */
if (isalpha(*(q + 1)))
rlen += scnprintf(buf + rlen, maxlen - rlen, ".");
if (mode == MODE_CLASS)
mode = MODE_FUNC;
else if (mode == MODE_CTYPE)
mode = MODE_TYPE;
break;
case '/':
if (mode != MODE_CLASS && mode != MODE_CTYPE)
goto error;
rlen += scnprintf(buf + rlen, maxlen - rlen, ".");
break;
default :
buf[rlen++] = *q;
}
}
buf[rlen] = '\0';
return buf;
error:
return NULL;
}
/*
* Demangle Java function signature (openJDK, not GCJ)
* input:
* str: string to parse. String is not modified
* flags: comobination of JAVA_DEMANGLE_* flags to modify demangling
* return:
* if input can be demangled, then a newly allocated string is returned.
* if input cannot be demangled, then NULL is returned
*
* Note: caller is responsible for freeing demangled string
*/
char *
java_demangle_sym(const char *str, int flags)
{
char *buf, *ptr;
char *p;
size_t len, l1 = 0;
if (!str)
return NULL;
/* find start of retunr type */
p = strrchr(str, ')');
if (!p)
return NULL;
/*
* expansion factor estimated to 3x
*/
len = strlen(str) * 3 + 1;
buf = malloc(len);
if (!buf)
return NULL;
buf[0] = '\0';
if (!(flags & JAVA_DEMANGLE_NORET)) {
/*
* get return type first
*/
ptr = __demangle_java_sym(p + 1, NULL, buf, len, MODE_TYPE);
if (!ptr)
goto error;
/* add space between return type and function prototype */
l1 = strlen(buf);
buf[l1++] = ' ';
}
/* process function up to return type */
ptr = __demangle_java_sym(str, p + 1, buf + l1, len - l1, MODE_PREFIX);
if (!ptr)
goto error;
return buf;
error:
free(buf);
return NULL;
}
|
