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