| 1 |
/* |
| 2 |
* Copyright (C) 2006-2007 Anders Gavare. All rights reserved. |
| 3 |
* |
| 4 |
* Redistribution and use in source and binary forms, with or without |
| 5 |
* modification, are permitted provided that the following conditions are met: |
| 6 |
* |
| 7 |
* 1. Redistributions of source code must retain the above copyright |
| 8 |
* notice, this list of conditions and the following disclaimer. |
| 9 |
* 2. Redistributions in binary form must reproduce the above copyright |
| 10 |
* notice, this list of conditions and the following disclaimer in the |
| 11 |
* documentation and/or other materials provided with the distribution. |
| 12 |
* 3. The name of the author may not be used to endorse or promote products |
| 13 |
* derived from this software without specific prior written permission. |
| 14 |
* |
| 15 |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| 16 |
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 17 |
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 18 |
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 19 |
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 20 |
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 21 |
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 22 |
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 23 |
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 24 |
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 25 |
* SUCH DAMAGE. |
| 26 |
* |
| 27 |
* |
| 28 |
* $Id: symbol_demangle.c,v 1.8 2007/06/15 17:02:38 debug Exp $ |
| 29 |
* |
| 30 |
* C++ symbol name demangling. |
| 31 |
* |
| 32 |
* For obvious performance reasons, the external c++filt utility cannot be |
| 33 |
* used. Also, the host's version of this utility might be incompatible with |
| 34 |
* the binary being emulated. |
| 35 |
* |
| 36 |
* TODO: Constructors, destructors, and lots of other stuff. See |
| 37 |
* http://www.codesourcery.com/cxx-abi/abi.html#mangling for details. |
| 38 |
*/ |
| 39 |
|
| 40 |
#include <stdio.h> |
| 41 |
#include <stdlib.h> |
| 42 |
#include <string.h> |
| 43 |
#include <ctype.h> |
| 44 |
|
| 45 |
#include "symbol.h" |
| 46 |
|
| 47 |
|
| 48 |
#define MAXLEN 1000 |
| 49 |
|
| 50 |
|
| 51 |
static void add_string(char *p, size_t *curlenp, char *to_add) |
| 52 |
{ |
| 53 |
size_t curlen = *curlenp; |
| 54 |
while (curlen < MAXLEN && *to_add) |
| 55 |
p[curlen++] = *to_add++; |
| 56 |
*curlenp = curlen; |
| 57 |
} |
| 58 |
|
| 59 |
|
| 60 |
/* |
| 61 |
* symbol_demangle_cplusplus_nested(): |
| 62 |
* |
| 63 |
* Try to demangle a nested cplusplus name. name points to the first character |
| 64 |
* after "_ZN". |
| 65 |
*/ |
| 66 |
static char *symbol_demangle_cplusplus_nested(char *name) |
| 67 |
{ |
| 68 |
char *result; |
| 69 |
size_t result_len = 0, len; |
| 70 |
int first = 1, type_added = 0, pointercounter, reference; |
| 71 |
|
| 72 |
CHECK_ALLOCATION(result = malloc(MAXLEN + 1)); |
| 73 |
result[0] = '\0'; |
| 74 |
|
| 75 |
while (name[0] && name[0] != 'E' && result_len < MAXLEN) { |
| 76 |
/* Read length of the next part: */ |
| 77 |
len = 0; |
| 78 |
if (*name == '0') { |
| 79 |
name ++; |
| 80 |
} else { |
| 81 |
while (isdigit((int)*name)) { |
| 82 |
len *= 10; |
| 83 |
len += (*name - '0'); |
| 84 |
name ++; |
| 85 |
} |
| 86 |
} |
| 87 |
|
| 88 |
/* Add :: */ |
| 89 |
if (!first) |
| 90 |
add_string(result, &result_len, "::"); |
| 91 |
|
| 92 |
/* Read the part itself: */ |
| 93 |
while (len-- >= 1 && result_len < MAXLEN) |
| 94 |
result[result_len ++] = *name++; |
| 95 |
|
| 96 |
first = 0; |
| 97 |
} |
| 98 |
|
| 99 |
if (name[0] != 'E') |
| 100 |
goto fail; |
| 101 |
|
| 102 |
name ++; |
| 103 |
|
| 104 |
if (*name) |
| 105 |
add_string(result, &result_len, "{"); |
| 106 |
|
| 107 |
/* Type: */ |
| 108 |
pointercounter = reference = 0; |
| 109 |
while (*name) { |
| 110 |
int argument_done = 0; |
| 111 |
char t = *name++; |
| 112 |
switch (t) { |
| 113 |
case 'c': |
| 114 |
add_string(result, &result_len, "char"); |
| 115 |
argument_done = 1; |
| 116 |
break; |
| 117 |
case 'a': |
| 118 |
add_string(result, &result_len, "signed char"); |
| 119 |
argument_done = 1; |
| 120 |
break; |
| 121 |
case 'h': |
| 122 |
add_string(result, &result_len, "unsigned char"); |
| 123 |
argument_done = 1; |
| 124 |
break; |
| 125 |
case 'i': |
| 126 |
add_string(result, &result_len, "int"); |
| 127 |
argument_done = 1; |
| 128 |
break; |
| 129 |
case 'j': |
| 130 |
add_string(result, &result_len, "unsigned int"); |
| 131 |
argument_done = 1; |
| 132 |
break; |
| 133 |
case 'w': |
| 134 |
add_string(result, &result_len, "wchar_t"); |
| 135 |
argument_done = 1; |
| 136 |
break; |
| 137 |
case 'b': |
| 138 |
add_string(result, &result_len, "bool"); |
| 139 |
argument_done = 1; |
| 140 |
break; |
| 141 |
case 's': |
| 142 |
add_string(result, &result_len, "short"); |
| 143 |
argument_done = 1; |
| 144 |
break; |
| 145 |
case 't': |
| 146 |
add_string(result, &result_len, "unsigned short"); |
| 147 |
argument_done = 1; |
| 148 |
break; |
| 149 |
case 'l': |
| 150 |
add_string(result, &result_len, "long"); |
| 151 |
argument_done = 1; |
| 152 |
break; |
| 153 |
case 'm': |
| 154 |
add_string(result, &result_len, "unsigned long"); |
| 155 |
argument_done = 1; |
| 156 |
break; |
| 157 |
case 'x': |
| 158 |
add_string(result, &result_len, "long long"); |
| 159 |
argument_done = 1; |
| 160 |
break; |
| 161 |
case 'y': |
| 162 |
add_string(result, &result_len, "unsigned long long"); |
| 163 |
argument_done = 1; |
| 164 |
break; |
| 165 |
case 'n': |
| 166 |
add_string(result, &result_len, "__int128"); |
| 167 |
argument_done = 1; |
| 168 |
break; |
| 169 |
case 'o': |
| 170 |
add_string(result, &result_len, "unsigned __int128"); |
| 171 |
argument_done = 1; |
| 172 |
break; |
| 173 |
case 'f': |
| 174 |
add_string(result, &result_len, "float"); |
| 175 |
argument_done = 1; |
| 176 |
break; |
| 177 |
case 'd': |
| 178 |
add_string(result, &result_len, "double"); |
| 179 |
argument_done = 1; |
| 180 |
break; |
| 181 |
case 'e': |
| 182 |
add_string(result, &result_len, "__float80"); |
| 183 |
argument_done = 1; |
| 184 |
break; |
| 185 |
case 'g': |
| 186 |
add_string(result, &result_len, "__float128"); |
| 187 |
argument_done = 1; |
| 188 |
break; |
| 189 |
case 'z': |
| 190 |
add_string(result, &result_len, "..."); |
| 191 |
argument_done = 1; |
| 192 |
break; |
| 193 |
case 'P': |
| 194 |
pointercounter ++; |
| 195 |
break; |
| 196 |
case 'R': |
| 197 |
reference ++; |
| 198 |
break; |
| 199 |
case 'v': /* void */ |
| 200 |
break; |
| 201 |
default:/* Unknown */ |
| 202 |
goto fail; |
| 203 |
} |
| 204 |
if (argument_done) { |
| 205 |
while (pointercounter-- > 0) |
| 206 |
add_string(result, &result_len, "*"); |
| 207 |
while (reference-- > 0) |
| 208 |
add_string(result, &result_len, "&"); |
| 209 |
if (*name) |
| 210 |
add_string(result, &result_len, ","); |
| 211 |
} |
| 212 |
type_added = 1; |
| 213 |
} |
| 214 |
|
| 215 |
if (type_added) |
| 216 |
add_string(result, &result_len, "}"); |
| 217 |
|
| 218 |
if (result_len == MAXLEN) |
| 219 |
goto fail; |
| 220 |
|
| 221 |
result[result_len] = '\0'; |
| 222 |
|
| 223 |
return result; |
| 224 |
|
| 225 |
fail: |
| 226 |
free(result); |
| 227 |
return NULL; |
| 228 |
} |
| 229 |
|
| 230 |
|
| 231 |
/* |
| 232 |
* symbol_demangle_cplusplus(): |
| 233 |
* |
| 234 |
* Try to demangle name. If name was not a valid/known C++ symbol, then NULL |
| 235 |
* is returned. Otherwise, a newly allocated string is returned, containing |
| 236 |
* the demangled name. |
| 237 |
*/ |
| 238 |
char *symbol_demangle_cplusplus(char *name) |
| 239 |
{ |
| 240 |
/* Only support _Z-style mangled names, for now: */ |
| 241 |
if (strlen(name) < 2 || name[0] != '_' || name[1] != 'Z') |
| 242 |
return NULL; |
| 243 |
|
| 244 |
name += 2; |
| 245 |
|
| 246 |
switch (name[0]) { |
| 247 |
case 'N': |
| 248 |
return symbol_demangle_cplusplus_nested(name + 1); |
| 249 |
break; |
| 250 |
} |
| 251 |
|
| 252 |
return NULL; |
| 253 |
} |
| 254 |
|
| 255 |
|
| 256 |
|
| 257 |
#ifdef TEST |
| 258 |
|
| 259 |
void test(char *mangled, char *result) |
| 260 |
{ |
| 261 |
char *p = symbol_demangle_cplusplus(mangled); |
| 262 |
if (p == NULL) { |
| 263 |
if (result == NULL) { |
| 264 |
return; |
| 265 |
} else { |
| 266 |
printf("FAILURE for %s!\n", mangled); |
| 267 |
exit(1); |
| 268 |
} |
| 269 |
} |
| 270 |
if (strcmp(p, result) == 0) |
| 271 |
return; |
| 272 |
printf("FAILURE for %s! (result = %s)\n", mangled, p); |
| 273 |
exit(1); |
| 274 |
} |
| 275 |
|
| 276 |
int main(int argc, char *argv[]) |
| 277 |
{ |
| 278 |
test("monkey", NULL); |
| 279 |
test("_monkey", NULL); |
| 280 |
test("_zmonkey", NULL); |
| 281 |
test("_Zmonkey", NULL); |
| 282 |
test("_ZQ5abcde", NULL); |
| 283 |
test("_ZN3abc5defghE", "abc::defgh"); |
| 284 |
test("_ZN05defghEv", "::defgh{}"); |
| 285 |
test("_ZN5defghEv", "defgh{}"); |
| 286 |
test("_ZN3abc5defghEv", "abc::defgh{}"); |
| 287 |
test("_ZN3abc5defghEc", "abc::defgh{char}"); |
| 288 |
test("_ZN1a2bcEjij", "a::bc{unsigned int,int,unsigned int}"); |
| 289 |
printf("OK\n"); |
| 290 |
return 0; |
| 291 |
} |
| 292 |
|
| 293 |
#endif |
| 294 |
|
Parent Directory
| 
Revision Log