1 // SPDX-License-Identifier: GPL-2.0 <<
2 #include <sys/types.h> 1 #include <sys/types.h>
3 #include <stdio.h> 2 #include <stdio.h>
4 #include <stdlib.h> <<
5 #include <string.h> 3 #include <string.h>
>> 4 #include "util.h"
>> 5 #include "debug.h"
6 #include "symbol.h" 6 #include "symbol.h"
7 7
8 #include "demangle-java.h" 8 #include "demangle-java.h"
9 9
10 #include <linux/ctype.h> <<
11 #include <linux/kernel.h> <<
12 <<
13 enum { 10 enum {
14 MODE_PREFIX = 0, 11 MODE_PREFIX = 0,
15 MODE_CLASS = 1, 12 MODE_CLASS = 1,
16 MODE_FUNC = 2, 13 MODE_FUNC = 2,
17 MODE_TYPE = 3, 14 MODE_TYPE = 3,
18 MODE_CTYPE = 4, /* class arg */ !! 15 MODE_CTYPE = 3, /* class arg */
19 }; 16 };
20 17
21 #define BASE_ENT(c, n) [c - 'A']=n 18 #define BASE_ENT(c, n) [c - 'A']=n
22 static const char *base_types['Z' - 'A' + 1] = 19 static const char *base_types['Z' - 'A' + 1] = {
23 BASE_ENT('B', "byte" ), 20 BASE_ENT('B', "byte" ),
24 BASE_ENT('C', "char" ), 21 BASE_ENT('C', "char" ),
25 BASE_ENT('D', "double" ), 22 BASE_ENT('D', "double" ),
26 BASE_ENT('F', "float" ), 23 BASE_ENT('F', "float" ),
27 BASE_ENT('I', "int" ), 24 BASE_ENT('I', "int" ),
28 BASE_ENT('J', "long" ), 25 BASE_ENT('J', "long" ),
29 BASE_ENT('S', "short" ), 26 BASE_ENT('S', "short" ),
30 BASE_ENT('Z', "boolean" ), !! 27 BASE_ENT('Z', "bool" ),
31 }; 28 };
32 29
33 /* 30 /*
34 * demangle Java symbol between str and end po 31 * demangle Java symbol between str and end positions and stores
35 * up to maxlen characters into buf. The parse 32 * up to maxlen characters into buf. The parser starts in mode.
36 * 33 *
37 * Use MODE_PREFIX to process entire prototype 34 * Use MODE_PREFIX to process entire prototype till end position
38 * Use MODE_TYPE to process return type if str 35 * Use MODE_TYPE to process return type if str starts on return type char
39 * 36 *
40 * Return: 37 * Return:
41 * success: buf 38 * success: buf
42 * error : NULL 39 * error : NULL
43 */ 40 */
44 static char * 41 static char *
45 __demangle_java_sym(const char *str, const cha 42 __demangle_java_sym(const char *str, const char *end, char *buf, int maxlen, int mode)
46 { 43 {
47 int rlen = 0; 44 int rlen = 0;
48 int array = 0; 45 int array = 0;
49 int narg = 0; 46 int narg = 0;
50 const char *q; 47 const char *q;
51 48
52 if (!end) 49 if (!end)
53 end = str + strlen(str); 50 end = str + strlen(str);
54 51
55 for (q = str; q != end; q++) { 52 for (q = str; q != end; q++) {
56 53
57 if (rlen == (maxlen - 1)) 54 if (rlen == (maxlen - 1))
58 break; 55 break;
59 56
60 switch (*q) { 57 switch (*q) {
61 case 'L': 58 case 'L':
62 if (mode == MODE_PREFI !! 59 if (mode == MODE_PREFIX || mode == MODE_CTYPE) {
63 if (mode == MO !! 60 if (mode == MODE_CTYPE) {
64 if (na 61 if (narg)
65 62 rlen += scnprintf(buf + rlen, maxlen - rlen, ", ");
66 narg++ 63 narg++;
67 } 64 }
>> 65 rlen += scnprintf(buf + rlen, maxlen - rlen, "class ");
68 if (mode == MO 66 if (mode == MODE_PREFIX)
69 mode = 67 mode = MODE_CLASS;
70 else <<
71 mode = <<
72 } else 68 } else
73 buf[rlen++] = 69 buf[rlen++] = *q;
74 break; 70 break;
75 case 'B': 71 case 'B':
76 case 'C': 72 case 'C':
77 case 'D': 73 case 'D':
78 case 'F': 74 case 'F':
79 case 'I': 75 case 'I':
80 case 'J': 76 case 'J':
81 case 'S': 77 case 'S':
82 case 'Z': 78 case 'Z':
83 if (mode == MODE_TYPE) 79 if (mode == MODE_TYPE) {
84 if (narg) 80 if (narg)
85 rlen + 81 rlen += scnprintf(buf + rlen, maxlen - rlen, ", ");
86 rlen += scnpri 82 rlen += scnprintf(buf + rlen, maxlen - rlen, "%s", base_types[*q - 'A']);
87 while (array-- 83 while (array--)
88 rlen + 84 rlen += scnprintf(buf + rlen, maxlen - rlen, "[]");
89 array = 0; 85 array = 0;
90 narg++; 86 narg++;
91 } else 87 } else
92 buf[rlen++] = 88 buf[rlen++] = *q;
93 break; 89 break;
94 case 'V': 90 case 'V':
95 if (mode == MODE_TYPE) 91 if (mode == MODE_TYPE) {
96 rlen += scnpri 92 rlen += scnprintf(buf + rlen, maxlen - rlen, "void");
97 while (array-- 93 while (array--)
98 rlen + 94 rlen += scnprintf(buf + rlen, maxlen - rlen, "[]");
99 array = 0; 95 array = 0;
100 } else 96 } else
101 buf[rlen++] = 97 buf[rlen++] = *q;
102 break; 98 break;
103 case '[': 99 case '[':
104 if (mode != MODE_TYPE) 100 if (mode != MODE_TYPE)
105 goto error; 101 goto error;
106 array++; 102 array++;
107 break; 103 break;
108 case '(': 104 case '(':
109 if (mode != MODE_FUNC) 105 if (mode != MODE_FUNC)
110 goto error; 106 goto error;
111 buf[rlen++] = *q; 107 buf[rlen++] = *q;
112 mode = MODE_TYPE; 108 mode = MODE_TYPE;
113 break; 109 break;
114 case ')': 110 case ')':
115 if (mode != MODE_TYPE) 111 if (mode != MODE_TYPE)
116 goto error; 112 goto error;
117 buf[rlen++] = *q; 113 buf[rlen++] = *q;
118 narg = 0; 114 narg = 0;
119 break; 115 break;
120 case ';': 116 case ';':
121 if (mode != MODE_CLASS 117 if (mode != MODE_CLASS && mode != MODE_CTYPE)
122 goto error; 118 goto error;
123 /* safe because at lea 119 /* safe because at least one other char to process */
124 if (isalpha(*(q + 1)) !! 120 if (isalpha(*(q + 1)))
125 rlen += scnpri 121 rlen += scnprintf(buf + rlen, maxlen - rlen, ".");
126 if (mode == MODE_CLASS 122 if (mode == MODE_CLASS)
127 mode = MODE_FU 123 mode = MODE_FUNC;
128 else if (mode == MODE_ 124 else if (mode == MODE_CTYPE)
129 mode = MODE_TY 125 mode = MODE_TYPE;
130 break; 126 break;
131 case '/': 127 case '/':
132 if (mode != MODE_CLASS 128 if (mode != MODE_CLASS && mode != MODE_CTYPE)
133 goto error; 129 goto error;
134 rlen += scnprintf(buf 130 rlen += scnprintf(buf + rlen, maxlen - rlen, ".");
135 break; 131 break;
136 default : 132 default :
137 buf[rlen++] = *q; 133 buf[rlen++] = *q;
138 } 134 }
139 } 135 }
140 buf[rlen] = '\0'; 136 buf[rlen] = '\0';
141 return buf; 137 return buf;
142 error: 138 error:
143 return NULL; 139 return NULL;
144 } 140 }
145 141
146 /* 142 /*
147 * Demangle Java function signature (openJDK, 143 * Demangle Java function signature (openJDK, not GCJ)
148 * input: 144 * input:
149 * str: string to parse. String is not mo 145 * str: string to parse. String is not modified
150 * flags: combination of JAVA_DEMANGLE_* fl !! 146 * flags: comobination of JAVA_DEMANGLE_* flags to modify demangling
151 * return: 147 * return:
152 * if input can be demangled, then a newl 148 * if input can be demangled, then a newly allocated string is returned.
153 * if input cannot be demangled, then NUL 149 * if input cannot be demangled, then NULL is returned
154 * 150 *
155 * Note: caller is responsible for freeing dem 151 * Note: caller is responsible for freeing demangled string
156 */ 152 */
157 char * 153 char *
158 java_demangle_sym(const char *str, int flags) 154 java_demangle_sym(const char *str, int flags)
159 { 155 {
160 char *buf, *ptr; 156 char *buf, *ptr;
161 char *p; 157 char *p;
162 size_t len, l1 = 0; 158 size_t len, l1 = 0;
163 159
164 if (!str) 160 if (!str)
165 return NULL; 161 return NULL;
166 162
167 /* find start of return type */ !! 163 /* find start of retunr type */
168 p = strrchr(str, ')'); 164 p = strrchr(str, ')');
169 if (!p) 165 if (!p)
170 return NULL; 166 return NULL;
171 167
172 /* 168 /*
173 * expansion factor estimated to 3x 169 * expansion factor estimated to 3x
174 */ 170 */
175 len = strlen(str) * 3 + 1; 171 len = strlen(str) * 3 + 1;
176 buf = malloc(len); 172 buf = malloc(len);
177 if (!buf) 173 if (!buf)
178 return NULL; 174 return NULL;
179 175
180 buf[0] = '\0'; 176 buf[0] = '\0';
181 if (!(flags & JAVA_DEMANGLE_NORET)) { 177 if (!(flags & JAVA_DEMANGLE_NORET)) {
182 /* 178 /*
183 * get return type first 179 * get return type first
184 */ 180 */
185 ptr = __demangle_java_sym(p + 181 ptr = __demangle_java_sym(p + 1, NULL, buf, len, MODE_TYPE);
186 if (!ptr) 182 if (!ptr)
187 goto error; 183 goto error;
188 184
189 /* add space between return ty 185 /* add space between return type and function prototype */
190 l1 = strlen(buf); 186 l1 = strlen(buf);
191 buf[l1++] = ' '; 187 buf[l1++] = ' ';
192 } 188 }
193 189
194 /* process function up to return type 190 /* process function up to return type */
195 ptr = __demangle_java_sym(str, p + 1, 191 ptr = __demangle_java_sym(str, p + 1, buf + l1, len - l1, MODE_PREFIX);
196 if (!ptr) 192 if (!ptr)
197 goto error; 193 goto error;
198 194
199 return buf; 195 return buf;
200 error: 196 error:
201 free(buf); 197 free(buf);
202 return NULL; 198 return NULL;
203 } 199 }
204 200
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.