Commit | Line | Data |
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c906108c | 1 | /* General utility routines for the remote server for GDB. |
6aba47ca | 2 | Copyright (C) 1986, 1989, 1993, 1995, 1996, 1997, 1999, 2000, 2002, 2003, |
4c38e0a4 | 3 | 2007, 2008, 2009, 2010 Free Software Foundation, Inc. |
c906108c | 4 | |
c5aa993b | 5 | This file is part of GDB. |
c906108c | 6 | |
c5aa993b JM |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 10 | (at your option) any later version. |
c906108c | 11 | |
c5aa993b JM |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
c906108c | 16 | |
c5aa993b | 17 | You should have received a copy of the GNU General Public License |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
19 | |
20 | #include "server.h" | |
21 | #include <stdio.h> | |
22 | #include <string.h> | |
68070c10 PA |
23 | #include <stdlib.h> |
24 | #if HAVE_ERRNO_H | |
25 | #include <errno.h> | |
26 | #endif | |
27 | #if HAVE_MALLOC_H | |
28 | #include <malloc.h> | |
29 | #endif | |
c906108c | 30 | |
fa593d66 PA |
31 | #ifdef IN_PROCESS_AGENT |
32 | # define PREFIX "ipa: " | |
33 | # define TOOLNAME "GDBserver in-process agent" | |
34 | #else | |
35 | # define PREFIX "gdbserver: " | |
36 | # define TOOLNAME "GDBserver" | |
37 | #endif | |
38 | ||
c906108c SS |
39 | /* Generally useful subroutines used throughout the program. */ |
40 | ||
bca929d3 DE |
41 | static void malloc_failure (size_t size) ATTR_NORETURN; |
42 | ||
43 | static void | |
44 | malloc_failure (size_t size) | |
45 | { | |
fa593d66 | 46 | fprintf (stderr, PREFIX "ran out of memory while trying to allocate %lu bytes\n", |
bca929d3 DE |
47 | (unsigned long) size); |
48 | exit (1); | |
49 | } | |
50 | ||
51 | /* Allocate memory without fail. | |
52 | If malloc fails, this will print a message to stderr and exit. */ | |
53 | ||
54 | void * | |
55 | xmalloc (size_t size) | |
56 | { | |
57 | void *newmem; | |
58 | ||
59 | if (size == 0) | |
60 | size = 1; | |
61 | newmem = malloc (size); | |
62 | if (!newmem) | |
63 | malloc_failure (size); | |
64 | ||
65 | return newmem; | |
66 | } | |
67 | ||
219f2f23 PA |
68 | /* Reallocate memory without fail. This works like xmalloc. */ |
69 | ||
70 | void * | |
71 | xrealloc (void *ptr, size_t size) | |
72 | { | |
73 | void *val; | |
74 | ||
75 | if (size == 0) | |
76 | size = 1; | |
77 | ||
78 | if (ptr != NULL) | |
79 | val = realloc (ptr, size); /* OK: realloc */ | |
80 | else | |
81 | val = malloc (size); /* OK: malloc */ | |
82 | if (val == NULL) | |
83 | malloc_failure (size); | |
84 | ||
85 | return val; | |
86 | } | |
87 | ||
bca929d3 DE |
88 | /* Allocate memory without fail and set it to zero. |
89 | If malloc fails, this will print a message to stderr and exit. */ | |
90 | ||
91 | void * | |
92 | xcalloc (size_t nelem, size_t elsize) | |
93 | { | |
94 | void *newmem; | |
95 | ||
96 | if (nelem == 0 || elsize == 0) | |
97 | nelem = elsize = 1; | |
98 | ||
99 | newmem = calloc (nelem, elsize); | |
100 | if (!newmem) | |
101 | malloc_failure (nelem * elsize); | |
102 | ||
103 | return newmem; | |
104 | } | |
105 | ||
106 | /* Copy a string into a memory buffer. | |
107 | If malloc fails, this will print a message to stderr and exit. */ | |
108 | ||
109 | char * | |
110 | xstrdup (const char *s) | |
111 | { | |
112 | char *ret = strdup (s); | |
113 | if (ret == NULL) | |
114 | malloc_failure (strlen (s) + 1); | |
115 | return ret; | |
116 | } | |
117 | ||
fa593d66 PA |
118 | #ifndef IN_PROCESS_AGENT |
119 | ||
aef93bd7 DE |
120 | /* Free a standard argv vector. */ |
121 | ||
122 | void | |
123 | freeargv (char **vector) | |
124 | { | |
125 | char **scan; | |
126 | ||
127 | if (vector != NULL) | |
128 | { | |
129 | for (scan = vector; *scan != NULL; scan++) | |
130 | { | |
131 | free (*scan); | |
132 | } | |
133 | free (vector); | |
134 | } | |
135 | } | |
136 | ||
fa593d66 PA |
137 | #endif |
138 | ||
c906108c SS |
139 | /* Print the system error message for errno, and also mention STRING |
140 | as the file name for which the error was encountered. | |
141 | Then return to command level. */ | |
142 | ||
143 | void | |
54363045 | 144 | perror_with_name (const char *string) |
c906108c | 145 | { |
5c44784c | 146 | const char *err; |
c906108c SS |
147 | char *combined; |
148 | ||
43d5792c DJ |
149 | err = strerror (errno); |
150 | if (err == NULL) | |
c906108c SS |
151 | err = "unknown error"; |
152 | ||
153 | combined = (char *) alloca (strlen (err) + strlen (string) + 3); | |
154 | strcpy (combined, string); | |
155 | strcat (combined, ": "); | |
156 | strcat (combined, err); | |
157 | ||
158 | error ("%s.", combined); | |
159 | } | |
160 | ||
161 | /* Print an error message and return to command level. | |
162 | STRING is the error message, used as a fprintf string, | |
163 | and ARG is passed as an argument to it. */ | |
164 | ||
0729219d | 165 | void |
c5aa993b | 166 | error (const char *string,...) |
c906108c | 167 | { |
fa593d66 | 168 | #ifndef IN_PROCESS_AGENT |
c906108c | 169 | extern jmp_buf toplevel; |
fa593d66 | 170 | #endif |
c906108c | 171 | va_list args; |
c906108c | 172 | va_start (args, string); |
c906108c | 173 | fflush (stdout); |
c906108c | 174 | vfprintf (stderr, string, args); |
c906108c | 175 | fprintf (stderr, "\n"); |
fa593d66 | 176 | #ifndef IN_PROCESS_AGENT |
c5aa993b | 177 | longjmp (toplevel, 1); |
fa593d66 PA |
178 | #else |
179 | exit (1); | |
180 | #endif | |
c906108c SS |
181 | } |
182 | ||
183 | /* Print an error message and exit reporting failure. | |
184 | This is for a error that we cannot continue from. | |
185 | STRING and ARG are passed to fprintf. */ | |
186 | ||
187 | /* VARARGS */ | |
0729219d | 188 | void |
0a30fbc4 | 189 | fatal (const char *string,...) |
c906108c SS |
190 | { |
191 | va_list args; | |
c906108c | 192 | va_start (args, string); |
fa593d66 | 193 | fprintf (stderr, PREFIX); |
c906108c SS |
194 | vfprintf (stderr, string, args); |
195 | fprintf (stderr, "\n"); | |
196 | va_end (args); | |
197 | exit (1); | |
198 | } | |
0a30fbc4 DJ |
199 | |
200 | /* VARARGS */ | |
201 | void | |
202 | warning (const char *string,...) | |
203 | { | |
204 | va_list args; | |
205 | va_start (args, string); | |
fa593d66 | 206 | fprintf (stderr, PREFIX); |
0a30fbc4 DJ |
207 | vfprintf (stderr, string, args); |
208 | fprintf (stderr, "\n"); | |
209 | va_end (args); | |
210 | } | |
aa5ca48f | 211 | |
e92d13d5 PA |
212 | /* Report a problem internal to GDBserver, and exit. */ |
213 | ||
214 | void | |
215 | internal_error (const char *file, int line, const char *fmt, ...) | |
216 | { | |
217 | va_list args; | |
218 | va_start (args, fmt); | |
219 | ||
220 | fprintf (stderr, "\ | |
fa593d66 | 221 | %s:%d: A problem internal to " TOOLNAME " has been detected.\n", file, line); |
e92d13d5 PA |
222 | vfprintf (stderr, fmt, args); |
223 | fprintf (stderr, "\n"); | |
224 | va_end (args); | |
225 | exit (1); | |
226 | } | |
227 | ||
aa5ca48f | 228 | /* Temporary storage using circular buffer. */ |
fa593d66 | 229 | #define NUMCELLS 10 |
aa5ca48f DE |
230 | #define CELLSIZE 50 |
231 | ||
232 | /* Return the next entry in the circular buffer. */ | |
233 | ||
234 | static char * | |
235 | get_cell (void) | |
236 | { | |
237 | static char buf[NUMCELLS][CELLSIZE]; | |
238 | static int cell = 0; | |
239 | if (++cell >= NUMCELLS) | |
240 | cell = 0; | |
241 | return buf[cell]; | |
242 | } | |
243 | ||
244 | /* Stdarg wrapper around vsnprintf. | |
245 | SIZE is the size of the buffer pointed to by STR. */ | |
246 | ||
247 | static int | |
248 | xsnprintf (char *str, size_t size, const char *format, ...) | |
249 | { | |
250 | va_list args; | |
251 | int ret; | |
252 | ||
253 | va_start (args, format); | |
254 | ret = vsnprintf (str, size, format, args); | |
255 | va_end (args); | |
256 | ||
257 | return ret; | |
258 | } | |
259 | ||
260 | /* Convert a CORE_ADDR into a HEX string, like %lx. | |
261 | The result is stored in a circular static buffer, NUMCELLS deep. */ | |
262 | ||
263 | char * | |
264 | paddress (CORE_ADDR addr) | |
265 | { | |
266 | char *str = get_cell (); | |
267 | xsnprintf (str, CELLSIZE, "%lx", (long) addr); | |
268 | return str; | |
269 | } | |
219f2f23 PA |
270 | |
271 | static char * | |
272 | decimal2str (char *sign, ULONGEST addr, int width) | |
273 | { | |
274 | /* Steal code from valprint.c:print_decimal(). Should this worry | |
275 | about the real size of addr as the above does? */ | |
276 | unsigned long temp[3]; | |
277 | char *str = get_cell (); | |
278 | ||
279 | int i = 0; | |
280 | do | |
281 | { | |
282 | temp[i] = addr % (1000 * 1000 * 1000); | |
283 | addr /= (1000 * 1000 * 1000); | |
284 | i++; | |
285 | width -= 9; | |
286 | } | |
287 | while (addr != 0 && i < (sizeof (temp) / sizeof (temp[0]))); | |
288 | ||
289 | width = 9; | |
290 | if (width < 0) | |
291 | width = 0; | |
292 | ||
293 | switch (i) | |
294 | { | |
295 | case 1: | |
296 | xsnprintf (str, CELLSIZE, "%s%0*lu", sign, width, temp[0]); | |
297 | break; | |
298 | case 2: | |
299 | xsnprintf (str, CELLSIZE, "%s%0*lu%09lu", sign, width, | |
300 | temp[1], temp[0]); | |
301 | break; | |
302 | case 3: | |
303 | xsnprintf (str, CELLSIZE, "%s%0*lu%09lu%09lu", sign, width, | |
304 | temp[2], temp[1], temp[0]); | |
305 | break; | |
306 | default: | |
307 | internal_error (__FILE__, __LINE__, | |
308 | "failed internal consistency check"); | |
309 | } | |
310 | ||
311 | return str; | |
312 | } | |
313 | ||
314 | /* %u for ULONGEST. The result is stored in a circular static buffer, | |
315 | NUMCELLS deep. */ | |
316 | ||
317 | char * | |
318 | pulongest (ULONGEST u) | |
319 | { | |
320 | return decimal2str ("", u, 0); | |
321 | } | |
322 | ||
323 | /* %d for LONGEST. The result is stored in a circular static buffer, | |
324 | NUMCELLS deep. */ | |
325 | ||
326 | char * | |
327 | plongest (LONGEST l) | |
328 | { | |
329 | if (l < 0) | |
330 | return decimal2str ("-", -l, 0); | |
331 | else | |
332 | return decimal2str ("", l, 0); | |
333 | } | |
334 | ||
335 | /* Eliminate warning from compiler on 32-bit systems. */ | |
336 | static int thirty_two = 32; | |
337 | ||
338 | /* Convert a ULONGEST into a HEX string, like %lx. The result is | |
339 | stored in a circular static buffer, NUMCELLS deep. */ | |
340 | ||
341 | char * | |
342 | phex_nz (ULONGEST l, int sizeof_l) | |
343 | { | |
344 | char *str; | |
345 | ||
346 | switch (sizeof_l) | |
347 | { | |
348 | case 8: | |
349 | { | |
350 | unsigned long high = (unsigned long) (l >> thirty_two); | |
351 | str = get_cell (); | |
352 | if (high == 0) | |
353 | xsnprintf (str, CELLSIZE, "%lx", | |
354 | (unsigned long) (l & 0xffffffff)); | |
355 | else | |
356 | xsnprintf (str, CELLSIZE, "%lx%08lx", high, | |
357 | (unsigned long) (l & 0xffffffff)); | |
358 | break; | |
359 | } | |
360 | case 4: | |
361 | str = get_cell (); | |
362 | xsnprintf (str, CELLSIZE, "%lx", (unsigned long) l); | |
363 | break; | |
364 | case 2: | |
365 | str = get_cell (); | |
366 | xsnprintf (str, CELLSIZE, "%x", (unsigned short) (l & 0xffff)); | |
367 | break; | |
368 | default: | |
369 | str = phex_nz (l, sizeof (l)); | |
370 | break; | |
371 | } | |
372 | ||
373 | return str; | |
374 | } |