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 | 5 | * This library is free software; you can redistribute it and/or |
53befeb7 NJ |
6 | * modify it under the terms of the GNU Lesser General Public License |
7 | * as published by the Free Software Foundation; either version 3 of | |
8 | * the License, or (at your option) any later version. | |
4907ff5a | 9 | * |
53befeb7 NJ |
10 | * This library is distributed in the hope that it will be useful, but |
11 | * 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 | |
53befeb7 NJ |
17 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
18 | * 02110-1301 USA | |
73be1d9e | 19 | */ |
4907ff5a | 20 | |
dbb605f5 | 21 | #ifdef HAVE_CONFIG_H |
5ebbe4ef RB |
22 | # include <config.h> |
23 | #endif | |
1bbd0b84 | 24 | |
a0599745 | 25 | #include "libguile/_scm.h" |
681b9005 MD |
26 | |
27 | #include <stdio.h> | |
783e7774 | 28 | #include <string.h> |
681b9005 MD |
29 | #ifdef HAVE_UNISTD_H |
30 | #include <unistd.h> | |
31 | #endif | |
32 | ||
a0599745 MD |
33 | #include "libguile/strports.h" |
34 | #include "libguile/read.h" | |
35 | #include "libguile/eval.h" | |
36 | #include "libguile/chars.h" | |
37 | #include "libguile/modules.h" | |
38 | #include "libguile/ports.h" | |
7e73eaee | 39 | #include "libguile/fluids.h" |
a0599745 | 40 | #include "libguile/strings.h" |
9293b3c6 | 41 | #include "libguile/init.h" |
4907ff5a | 42 | |
a0599745 | 43 | #include "libguile/gdbint.h" |
4907ff5a MD |
44 | \f |
45 | /* {Support for debugging with gdb} | |
46 | * | |
47 | * TODO: | |
48 | * | |
49 | * 1. Redirect outputs | |
50 | * 2. Catch errors | |
51 | * 3. Prevent print from causing segmentation fault when given broken pairs | |
52 | */ | |
53 | ||
4907ff5a MD |
54 | #define GDB_TYPE SCM |
55 | ||
a0599745 | 56 | #include "libguile/gdb_interface.h" |
4907ff5a MD |
57 | |
58 | \f | |
59 | ||
60 | /* Be carefull when this macro is true. | |
406c7d90 | 61 | scm_gc_running_p is set during gc. |
4907ff5a | 62 | */ |
406c7d90 | 63 | #define SCM_GC_P (scm_gc_running_p) |
4907ff5a MD |
64 | |
65 | /* Macros that encapsulate blocks of code which can be called by the | |
66 | * debugger. | |
67 | */ | |
68 | #define SCM_BEGIN_FOREIGN_BLOCK \ | |
d3a6bc94 | 69 | do { \ |
4907ff5a | 70 | scm_print_carefully_p = 1; \ |
d3a6bc94 | 71 | } while (0) |
4907ff5a MD |
72 | |
73 | ||
74 | #define SCM_END_FOREIGN_BLOCK \ | |
d3a6bc94 | 75 | do { \ |
4907ff5a | 76 | scm_print_carefully_p = 0; \ |
d3a6bc94 | 77 | } while (0) |
4907ff5a MD |
78 | |
79 | ||
80 | #define RESET_STRING { gdb_output_length = 0; } | |
81 | ||
82 | #define SEND_STRING(str) \ | |
d3a6bc94 | 83 | do { \ |
a57c1cc7 MD |
84 | gdb_output = (char *) (str); \ |
85 | gdb_output_length = strlen ((const char *) (str)); \ | |
d3a6bc94 | 86 | } while (0) |
380b6b4c | 87 | |
4907ff5a MD |
88 | |
89 | /* {Gdb interface} | |
90 | */ | |
91 | ||
92 | unsigned short gdb_options = GDB_HAVE_BINDINGS; | |
93 | ||
94 | char *gdb_language = "lisp/c"; | |
95 | ||
96 | SCM gdb_result; | |
97 | ||
98 | char *gdb_output; | |
99 | ||
100 | int gdb_output_length; | |
101 | ||
102 | int scm_print_carefully_p; | |
103 | ||
104 | static SCM gdb_input_port; | |
380b6b4c MD |
105 | static int port_mark_p, stream_mark_p, string_mark_p; |
106 | ||
4907ff5a | 107 | static SCM gdb_output_port; |
4907ff5a | 108 | |
1cc91f1b | 109 | |
380b6b4c | 110 | static void |
1bbd0b84 | 111 | unmark_port (SCM port) |
380b6b4c MD |
112 | { |
113 | SCM stream, string; | |
c8a1bdc4 HWN |
114 | port_mark_p = SCM_GC_MARK_P (port); |
115 | SCM_CLEAR_GC_MARK (port); | |
74a16888 | 116 | stream = SCM_PACK (SCM_STREAM (port)); |
c8a1bdc4 HWN |
117 | stream_mark_p = SCM_GC_MARK_P (stream); |
118 | SCM_CLEAR_GC_MARK (stream); | |
380b6b4c | 119 | string = SCM_CDR (stream); |
c8a1bdc4 HWN |
120 | string_mark_p = SCM_GC_MARK_P (string); |
121 | SCM_CLEAR_GC_MARK (string); | |
380b6b4c MD |
122 | } |
123 | ||
1cc91f1b | 124 | |
380b6b4c | 125 | static void |
1bbd0b84 | 126 | remark_port (SCM port) |
380b6b4c | 127 | { |
74a16888 | 128 | SCM stream = SCM_PACK (SCM_STREAM (port)); |
380b6b4c | 129 | SCM string = SCM_CDR (stream); |
c8a1bdc4 HWN |
130 | if (string_mark_p) |
131 | SCM_SET_GC_MARK (string); | |
132 | if (stream_mark_p) | |
133 | SCM_SET_GC_MARK (stream); | |
134 | if (port_mark_p) | |
135 | SCM_SET_GC_MARK (port); | |
380b6b4c MD |
136 | } |
137 | ||
1cc91f1b | 138 | |
4907ff5a | 139 | int |
6e8d25a6 | 140 | gdb_maybe_valid_type_p (SCM value) |
4907ff5a | 141 | { |
c8a1bdc4 | 142 | return SCM_IMP (value) || scm_in_heap_p (value); |
4907ff5a MD |
143 | } |
144 | ||
1cc91f1b | 145 | |
4907ff5a | 146 | int |
6e8d25a6 | 147 | gdb_read (char *str) |
4907ff5a MD |
148 | { |
149 | SCM ans; | |
150 | int status = 0; | |
151 | RESET_STRING; | |
152 | /* Need to be restrictive about what to read? */ | |
153 | if (SCM_GC_P) | |
154 | { | |
155 | char *p; | |
156 | for (p = str; *p != '\0'; ++p) | |
157 | switch (*p) | |
158 | { | |
159 | case '(': | |
160 | case '\'': | |
161 | case '"': | |
162 | SEND_STRING ("Can't read this kind of expressions during gc"); | |
163 | return -1; | |
164 | case '#': | |
165 | if (*++p == '\0') | |
166 | goto premature; | |
167 | if (*p == '\\') | |
168 | { | |
169 | if (*++p != '\0') | |
170 | continue; | |
171 | premature: | |
172 | SEND_STRING ("Premature end of lisp expression"); | |
173 | return -1; | |
174 | } | |
175 | default: | |
176 | continue; | |
177 | } | |
178 | } | |
179 | SCM_BEGIN_FOREIGN_BLOCK; | |
380b6b4c | 180 | unmark_port (gdb_input_port); |
e11e83f3 | 181 | scm_seek (gdb_input_port, SCM_INUM0, scm_from_int (SEEK_SET)); |
840ae05d | 182 | scm_puts (str, gdb_input_port); |
69bc9ff3 | 183 | scm_truncate_file (gdb_input_port, SCM_UNDEFINED); |
e11e83f3 | 184 | scm_seek (gdb_input_port, SCM_INUM0, scm_from_int (SEEK_SET)); |
7337d56d | 185 | |
4907ff5a | 186 | /* Read one object */ |
7337d56d | 187 | ans = scm_read (gdb_input_port); |
4907ff5a MD |
188 | if (SCM_GC_P) |
189 | { | |
380b6b4c | 190 | if (SCM_NIMP (ans)) |
4907ff5a MD |
191 | { |
192 | SEND_STRING ("Non-immediate created during gc. Memory may be trashed."); | |
193 | status = -1; | |
194 | goto exit; | |
195 | } | |
196 | } | |
380b6b4c | 197 | gdb_result = ans; |
4907ff5a | 198 | /* Protect answer from future GC */ |
380b6b4c MD |
199 | if (SCM_NIMP (ans)) |
200 | scm_permanent_object (ans); | |
4907ff5a | 201 | exit: |
380b6b4c | 202 | remark_port (gdb_input_port); |
4907ff5a MD |
203 | SCM_END_FOREIGN_BLOCK; |
204 | return status; | |
205 | } | |
206 | ||
1cc91f1b | 207 | |
4907ff5a | 208 | int |
6e8d25a6 | 209 | gdb_eval (SCM exp) |
4907ff5a MD |
210 | { |
211 | RESET_STRING; | |
4907ff5a MD |
212 | if (SCM_GC_P) |
213 | { | |
214 | SEND_STRING ("Can't evaluate lisp expressions during gc"); | |
215 | return -1; | |
216 | } | |
217 | SCM_BEGIN_FOREIGN_BLOCK; | |
218 | { | |
7e73eaee | 219 | SCM env = scm_top_level_env (SCM_TOP_LEVEL_LOOKUP_CLOSURE); |
434f2f7a | 220 | gdb_result = scm_permanent_object (scm_i_eval_x (exp, env)); |
4907ff5a MD |
221 | } |
222 | SCM_END_FOREIGN_BLOCK; | |
223 | return 0; | |
224 | } | |
225 | ||
1cc91f1b | 226 | |
4907ff5a | 227 | int |
6e8d25a6 | 228 | gdb_print (SCM obj) |
4907ff5a | 229 | { |
9293b3c6 MD |
230 | if (!scm_initialized_p) |
231 | SEND_STRING ("*** Guile not initialized ***"); | |
232 | else | |
233 | { | |
234 | RESET_STRING; | |
235 | SCM_BEGIN_FOREIGN_BLOCK; | |
236 | /* Reset stream */ | |
e11e83f3 | 237 | scm_seek (gdb_output_port, SCM_INUM0, scm_from_int (SEEK_SET)); |
9293b3c6 MD |
238 | scm_write (obj, gdb_output_port); |
239 | scm_truncate_file (gdb_output_port, SCM_UNDEFINED); | |
240 | { | |
92c2555f | 241 | scm_t_port *pt = SCM_PTAB_ENTRY (gdb_output_port); |
9293b3c6 MD |
242 | |
243 | scm_flush (gdb_output_port); | |
244 | *(pt->write_buf + pt->read_buf_size) = 0; | |
245 | SEND_STRING (pt->read_buf); | |
246 | } | |
247 | SCM_END_FOREIGN_BLOCK; | |
248 | } | |
4907ff5a MD |
249 | return 0; |
250 | } | |
251 | ||
1cc91f1b | 252 | |
4907ff5a | 253 | int |
6e8d25a6 | 254 | gdb_binding (SCM name, SCM value) |
4907ff5a MD |
255 | { |
256 | RESET_STRING; | |
257 | if (SCM_GC_P) | |
258 | { | |
259 | SEND_STRING ("Can't create new bindings during gc"); | |
260 | return -1; | |
261 | } | |
262 | SCM_BEGIN_FOREIGN_BLOCK; | |
263 | { | |
86d31dfe MV |
264 | SCM var = scm_sym2var (name, SCM_TOP_LEVEL_LOOKUP_CLOSURE, SCM_BOOL_T); |
265 | SCM_VARIABLE_SET (var, value); | |
4907ff5a MD |
266 | } |
267 | SCM_END_FOREIGN_BLOCK; | |
268 | return 0; | |
269 | } | |
270 | ||
271 | void | |
272 | scm_init_gdbint () | |
273 | { | |
274 | static char *s = "scm_init_gdb_interface"; | |
275 | SCM port; | |
276 | ||
277 | scm_print_carefully_p = 0; | |
278 | ||
279 | port = scm_mkstrport (SCM_INUM0, | |
cc95e00a | 280 | scm_c_make_string (0, SCM_UNDEFINED), |
4907ff5a MD |
281 | SCM_OPN | SCM_WRTNG, |
282 | s); | |
283 | gdb_output_port = scm_permanent_object (port); | |
284 | ||
285 | port = scm_mkstrport (SCM_INUM0, | |
cc95e00a | 286 | scm_c_make_string (0, SCM_UNDEFINED), |
840ae05d | 287 | SCM_OPN | SCM_RDNG | SCM_WRTNG, |
4907ff5a MD |
288 | s); |
289 | gdb_input_port = scm_permanent_object (port); | |
290 | } | |
89e00824 ML |
291 | |
292 | /* | |
293 | Local Variables: | |
294 | c-file-style: "gnu" | |
295 | End: | |
296 | */ |