Commit | Line | Data |
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4907ff5a | 1 | /* GDB interface for Guile |
434f2f7a DH |
2 | * Copyright (C) 1996,1997,1999,2000,2001,2002,2004 |
3 | * Free Software Foundation, Inc. | |
4907ff5a | 4 | * |
73be1d9e MV |
5 | * This library is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU Lesser General Public | |
7 | * License as published by the Free Software Foundation; either | |
8 | * version 2.1 of the License, or (at your option) any later version. | |
4907ff5a | 9 | * |
73be1d9e | 10 | * This library is distributed in the hope that it will be useful, |
4907ff5a | 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
73be1d9e MV |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | * Lesser General Public License for more details. | |
4907ff5a | 14 | * |
73be1d9e MV |
15 | * You should have received a copy of the GNU Lesser General Public |
16 | * License along with this library; if not, write to the Free Software | |
92205699 | 17 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
73be1d9e | 18 | */ |
4907ff5a | 19 | |
5ebbe4ef RB |
20 | #if HAVE_CONFIG_H |
21 | # include <config.h> | |
22 | #endif | |
1bbd0b84 | 23 | |
a0599745 | 24 | #include "libguile/_scm.h" |
681b9005 MD |
25 | |
26 | #include <stdio.h> | |
783e7774 | 27 | #include <string.h> |
681b9005 MD |
28 | #ifdef HAVE_UNISTD_H |
29 | #include <unistd.h> | |
30 | #endif | |
31 | ||
a0599745 MD |
32 | #include "libguile/strports.h" |
33 | #include "libguile/read.h" | |
34 | #include "libguile/eval.h" | |
35 | #include "libguile/chars.h" | |
36 | #include "libguile/modules.h" | |
37 | #include "libguile/ports.h" | |
7e73eaee | 38 | #include "libguile/fluids.h" |
a0599745 | 39 | #include "libguile/strings.h" |
9293b3c6 | 40 | #include "libguile/init.h" |
4907ff5a | 41 | |
a0599745 | 42 | #include "libguile/gdbint.h" |
4907ff5a MD |
43 | \f |
44 | /* {Support for debugging with gdb} | |
45 | * | |
46 | * TODO: | |
47 | * | |
48 | * 1. Redirect outputs | |
49 | * 2. Catch errors | |
50 | * 3. Prevent print from causing segmentation fault when given broken pairs | |
51 | */ | |
52 | ||
4907ff5a MD |
53 | #define GDB_TYPE SCM |
54 | ||
a0599745 | 55 | #include "libguile/gdb_interface.h" |
4907ff5a MD |
56 | |
57 | \f | |
58 | ||
59 | /* Be carefull when this macro is true. | |
406c7d90 | 60 | scm_gc_running_p is set during gc. |
4907ff5a | 61 | */ |
406c7d90 | 62 | #define SCM_GC_P (scm_gc_running_p) |
4907ff5a MD |
63 | |
64 | /* Macros that encapsulate blocks of code which can be called by the | |
65 | * debugger. | |
66 | */ | |
67 | #define SCM_BEGIN_FOREIGN_BLOCK \ | |
d3a6bc94 | 68 | do { \ |
4907ff5a | 69 | scm_print_carefully_p = 1; \ |
d3a6bc94 | 70 | } while (0) |
4907ff5a MD |
71 | |
72 | ||
73 | #define SCM_END_FOREIGN_BLOCK \ | |
d3a6bc94 | 74 | do { \ |
4907ff5a | 75 | scm_print_carefully_p = 0; \ |
d3a6bc94 | 76 | } while (0) |
4907ff5a MD |
77 | |
78 | ||
79 | #define RESET_STRING { gdb_output_length = 0; } | |
80 | ||
81 | #define SEND_STRING(str) \ | |
d3a6bc94 | 82 | do { \ |
a57c1cc7 MD |
83 | gdb_output = (char *) (str); \ |
84 | gdb_output_length = strlen ((const char *) (str)); \ | |
d3a6bc94 | 85 | } while (0) |
380b6b4c | 86 | |
4907ff5a MD |
87 | |
88 | /* {Gdb interface} | |
89 | */ | |
90 | ||
91 | unsigned short gdb_options = GDB_HAVE_BINDINGS; | |
92 | ||
93 | char *gdb_language = "lisp/c"; | |
94 | ||
95 | SCM gdb_result; | |
96 | ||
97 | char *gdb_output; | |
98 | ||
99 | int gdb_output_length; | |
100 | ||
101 | int scm_print_carefully_p; | |
102 | ||
103 | static SCM gdb_input_port; | |
380b6b4c MD |
104 | static int port_mark_p, stream_mark_p, string_mark_p; |
105 | ||
4907ff5a | 106 | static SCM gdb_output_port; |
4907ff5a | 107 | |
1cc91f1b | 108 | |
380b6b4c | 109 | static void |
1bbd0b84 | 110 | unmark_port (SCM port) |
380b6b4c MD |
111 | { |
112 | SCM stream, string; | |
c8a1bdc4 HWN |
113 | port_mark_p = SCM_GC_MARK_P (port); |
114 | SCM_CLEAR_GC_MARK (port); | |
74a16888 | 115 | stream = SCM_PACK (SCM_STREAM (port)); |
c8a1bdc4 HWN |
116 | stream_mark_p = SCM_GC_MARK_P (stream); |
117 | SCM_CLEAR_GC_MARK (stream); | |
380b6b4c | 118 | string = SCM_CDR (stream); |
c8a1bdc4 HWN |
119 | string_mark_p = SCM_GC_MARK_P (string); |
120 | SCM_CLEAR_GC_MARK (string); | |
380b6b4c MD |
121 | } |
122 | ||
1cc91f1b | 123 | |
380b6b4c | 124 | static void |
1bbd0b84 | 125 | remark_port (SCM port) |
380b6b4c | 126 | { |
74a16888 | 127 | SCM stream = SCM_PACK (SCM_STREAM (port)); |
380b6b4c | 128 | SCM string = SCM_CDR (stream); |
c8a1bdc4 HWN |
129 | if (string_mark_p) |
130 | SCM_SET_GC_MARK (string); | |
131 | if (stream_mark_p) | |
132 | SCM_SET_GC_MARK (stream); | |
133 | if (port_mark_p) | |
134 | SCM_SET_GC_MARK (port); | |
380b6b4c MD |
135 | } |
136 | ||
1cc91f1b | 137 | |
4907ff5a | 138 | int |
6e8d25a6 | 139 | gdb_maybe_valid_type_p (SCM value) |
4907ff5a | 140 | { |
c8a1bdc4 | 141 | return SCM_IMP (value) || scm_in_heap_p (value); |
4907ff5a MD |
142 | } |
143 | ||
1cc91f1b | 144 | |
4907ff5a | 145 | int |
6e8d25a6 | 146 | gdb_read (char *str) |
4907ff5a MD |
147 | { |
148 | SCM ans; | |
149 | int status = 0; | |
150 | RESET_STRING; | |
151 | /* Need to be restrictive about what to read? */ | |
152 | if (SCM_GC_P) | |
153 | { | |
154 | char *p; | |
155 | for (p = str; *p != '\0'; ++p) | |
156 | switch (*p) | |
157 | { | |
158 | case '(': | |
159 | case '\'': | |
160 | case '"': | |
161 | SEND_STRING ("Can't read this kind of expressions during gc"); | |
162 | return -1; | |
163 | case '#': | |
164 | if (*++p == '\0') | |
165 | goto premature; | |
166 | if (*p == '\\') | |
167 | { | |
168 | if (*++p != '\0') | |
169 | continue; | |
170 | premature: | |
171 | SEND_STRING ("Premature end of lisp expression"); | |
172 | return -1; | |
173 | } | |
174 | default: | |
175 | continue; | |
176 | } | |
177 | } | |
178 | SCM_BEGIN_FOREIGN_BLOCK; | |
380b6b4c | 179 | unmark_port (gdb_input_port); |
e11e83f3 | 180 | scm_seek (gdb_input_port, SCM_INUM0, scm_from_int (SEEK_SET)); |
840ae05d | 181 | scm_puts (str, gdb_input_port); |
69bc9ff3 | 182 | scm_truncate_file (gdb_input_port, SCM_UNDEFINED); |
e11e83f3 | 183 | scm_seek (gdb_input_port, SCM_INUM0, scm_from_int (SEEK_SET)); |
7337d56d | 184 | |
4907ff5a | 185 | /* Read one object */ |
7337d56d | 186 | ans = scm_read (gdb_input_port); |
4907ff5a MD |
187 | if (SCM_GC_P) |
188 | { | |
380b6b4c | 189 | if (SCM_NIMP (ans)) |
4907ff5a MD |
190 | { |
191 | SEND_STRING ("Non-immediate created during gc. Memory may be trashed."); | |
192 | status = -1; | |
193 | goto exit; | |
194 | } | |
195 | } | |
380b6b4c | 196 | gdb_result = ans; |
4907ff5a | 197 | /* Protect answer from future GC */ |
380b6b4c MD |
198 | if (SCM_NIMP (ans)) |
199 | scm_permanent_object (ans); | |
4907ff5a | 200 | exit: |
380b6b4c | 201 | remark_port (gdb_input_port); |
4907ff5a MD |
202 | SCM_END_FOREIGN_BLOCK; |
203 | return status; | |
204 | } | |
205 | ||
1cc91f1b | 206 | |
4907ff5a | 207 | int |
6e8d25a6 | 208 | gdb_eval (SCM exp) |
4907ff5a MD |
209 | { |
210 | RESET_STRING; | |
4907ff5a MD |
211 | if (SCM_GC_P) |
212 | { | |
213 | SEND_STRING ("Can't evaluate lisp expressions during gc"); | |
214 | return -1; | |
215 | } | |
216 | SCM_BEGIN_FOREIGN_BLOCK; | |
217 | { | |
7e73eaee | 218 | SCM env = scm_top_level_env (SCM_TOP_LEVEL_LOOKUP_CLOSURE); |
434f2f7a | 219 | gdb_result = scm_permanent_object (scm_i_eval_x (exp, env)); |
4907ff5a MD |
220 | } |
221 | SCM_END_FOREIGN_BLOCK; | |
222 | return 0; | |
223 | } | |
224 | ||
1cc91f1b | 225 | |
4907ff5a | 226 | int |
6e8d25a6 | 227 | gdb_print (SCM obj) |
4907ff5a | 228 | { |
9293b3c6 MD |
229 | if (!scm_initialized_p) |
230 | SEND_STRING ("*** Guile not initialized ***"); | |
231 | else | |
232 | { | |
233 | RESET_STRING; | |
234 | SCM_BEGIN_FOREIGN_BLOCK; | |
235 | /* Reset stream */ | |
e11e83f3 | 236 | scm_seek (gdb_output_port, SCM_INUM0, scm_from_int (SEEK_SET)); |
9293b3c6 MD |
237 | scm_write (obj, gdb_output_port); |
238 | scm_truncate_file (gdb_output_port, SCM_UNDEFINED); | |
239 | { | |
92c2555f | 240 | scm_t_port *pt = SCM_PTAB_ENTRY (gdb_output_port); |
9293b3c6 MD |
241 | |
242 | scm_flush (gdb_output_port); | |
243 | *(pt->write_buf + pt->read_buf_size) = 0; | |
244 | SEND_STRING (pt->read_buf); | |
245 | } | |
246 | SCM_END_FOREIGN_BLOCK; | |
247 | } | |
4907ff5a MD |
248 | return 0; |
249 | } | |
250 | ||
1cc91f1b | 251 | |
4907ff5a | 252 | int |
6e8d25a6 | 253 | gdb_binding (SCM name, SCM value) |
4907ff5a MD |
254 | { |
255 | RESET_STRING; | |
256 | if (SCM_GC_P) | |
257 | { | |
258 | SEND_STRING ("Can't create new bindings during gc"); | |
259 | return -1; | |
260 | } | |
261 | SCM_BEGIN_FOREIGN_BLOCK; | |
262 | { | |
86d31dfe MV |
263 | SCM var = scm_sym2var (name, SCM_TOP_LEVEL_LOOKUP_CLOSURE, SCM_BOOL_T); |
264 | SCM_VARIABLE_SET (var, value); | |
4907ff5a MD |
265 | } |
266 | SCM_END_FOREIGN_BLOCK; | |
267 | return 0; | |
268 | } | |
269 | ||
270 | void | |
271 | scm_init_gdbint () | |
272 | { | |
273 | static char *s = "scm_init_gdb_interface"; | |
274 | SCM port; | |
275 | ||
276 | scm_print_carefully_p = 0; | |
277 | ||
278 | port = scm_mkstrport (SCM_INUM0, | |
cc95e00a | 279 | scm_c_make_string (0, SCM_UNDEFINED), |
4907ff5a MD |
280 | SCM_OPN | SCM_WRTNG, |
281 | s); | |
282 | gdb_output_port = scm_permanent_object (port); | |
283 | ||
284 | port = scm_mkstrport (SCM_INUM0, | |
cc95e00a | 285 | scm_c_make_string (0, SCM_UNDEFINED), |
840ae05d | 286 | SCM_OPN | SCM_RDNG | SCM_WRTNG, |
4907ff5a MD |
287 | s); |
288 | gdb_input_port = scm_permanent_object (port); | |
289 | } | |
89e00824 ML |
290 | |
291 | /* | |
292 | Local Variables: | |
293 | c-file-style: "gnu" | |
294 | End: | |
295 | */ |