1 /* GDB interface for Guile
2 * Copyright (C) 1996,1997,1999,2000,2001,2002,2004
3 * Free Software Foundation, Inc.
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.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
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
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 #include "libguile/_scm.h"
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"
38 #include "libguile/fluids.h"
39 #include "libguile/strings.h"
40 #include "libguile/init.h"
42 #include "libguile/gdbint.h"
44 /* {Support for debugging with gdb}
50 * 3. Prevent print from causing segmentation fault when given broken pairs
55 #include "libguile/gdb_interface.h"
59 /* Be carefull when this macro is true.
60 scm_gc_running_p is set during gc.
62 #define SCM_GC_P (scm_gc_running_p)
64 /* Macros that encapsulate blocks of code which can be called by the
67 #define SCM_BEGIN_FOREIGN_BLOCK \
69 scm_print_carefully_p = 1; \
73 #define SCM_END_FOREIGN_BLOCK \
75 scm_print_carefully_p = 0; \
79 #define RESET_STRING { gdb_output_length = 0; }
81 #define SEND_STRING(str) \
83 gdb_output = (char *) (str); \
84 gdb_output_length = strlen ((const char *) (str)); \
91 unsigned short gdb_options = GDB_HAVE_BINDINGS;
93 char *gdb_language = "lisp/c";
99 int gdb_output_length;
101 int scm_print_carefully_p;
103 static SCM gdb_input_port;
104 static int port_mark_p, stream_mark_p, string_mark_p;
106 static SCM gdb_output_port;
110 unmark_port (SCM port)
113 port_mark_p = SCM_GC_MARK_P (port);
114 SCM_CLEAR_GC_MARK (port);
115 stream = SCM_PACK (SCM_STREAM (port));
116 stream_mark_p = SCM_GC_MARK_P (stream);
117 SCM_CLEAR_GC_MARK (stream);
118 string = SCM_CDR (stream);
119 string_mark_p = SCM_GC_MARK_P (string);
120 SCM_CLEAR_GC_MARK (string);
125 remark_port (SCM port)
127 SCM stream = SCM_PACK (SCM_STREAM (port));
128 SCM string = SCM_CDR (stream);
130 SCM_SET_GC_MARK (string);
132 SCM_SET_GC_MARK (stream);
134 SCM_SET_GC_MARK (port);
139 gdb_maybe_valid_type_p (SCM value)
141 return SCM_IMP (value) || scm_in_heap_p (value);
151 /* Need to be restrictive about what to read? */
155 for (p = str; *p != '\0'; ++p)
161 SEND_STRING ("Can't read this kind of expressions during gc");
171 SEND_STRING ("Premature end of lisp expression");
178 SCM_BEGIN_FOREIGN_BLOCK;
179 unmark_port (gdb_input_port);
180 scm_seek (gdb_input_port, SCM_INUM0, scm_from_int (SEEK_SET));
181 scm_puts (str, gdb_input_port);
182 scm_truncate_file (gdb_input_port, SCM_UNDEFINED);
183 scm_seek (gdb_input_port, SCM_INUM0, scm_from_int (SEEK_SET));
185 /* Read one object */
186 ans = scm_read (gdb_input_port);
191 SEND_STRING ("Non-immediate created during gc. Memory may be trashed.");
197 /* Protect answer from future GC */
199 scm_permanent_object (ans);
201 remark_port (gdb_input_port);
202 SCM_END_FOREIGN_BLOCK;
213 SEND_STRING ("Can't evaluate lisp expressions during gc");
216 SCM_BEGIN_FOREIGN_BLOCK;
218 SCM env = scm_top_level_env (SCM_TOP_LEVEL_LOOKUP_CLOSURE);
219 gdb_result = scm_permanent_object (scm_i_eval_x (exp, env));
221 SCM_END_FOREIGN_BLOCK;
229 if (!scm_initialized_p)
230 SEND_STRING ("*** Guile not initialized ***");
234 SCM_BEGIN_FOREIGN_BLOCK;
236 scm_seek (gdb_output_port, SCM_INUM0, scm_from_int (SEEK_SET));
237 scm_write (obj, gdb_output_port);
238 scm_truncate_file (gdb_output_port, SCM_UNDEFINED);
240 scm_t_port *pt = SCM_PTAB_ENTRY (gdb_output_port);
242 scm_flush (gdb_output_port);
243 *(pt->write_buf + pt->read_buf_size) = 0;
244 SEND_STRING (pt->read_buf);
246 SCM_END_FOREIGN_BLOCK;
253 gdb_binding (SCM name, SCM value)
258 SEND_STRING ("Can't create new bindings during gc");
261 SCM_BEGIN_FOREIGN_BLOCK;
263 SCM var = scm_sym2var (name, SCM_TOP_LEVEL_LOOKUP_CLOSURE, SCM_BOOL_T);
264 SCM_VARIABLE_SET (var, value);
266 SCM_END_FOREIGN_BLOCK;
273 static char *s = "scm_init_gdb_interface";
276 scm_print_carefully_p = 0;
278 port = scm_mkstrport (SCM_INUM0,
279 scm_c_make_string (0, SCM_UNDEFINED),
282 gdb_output_port = scm_permanent_object (port);
284 port = scm_mkstrport (SCM_INUM0,
285 scm_c_make_string (0, SCM_UNDEFINED),
286 SCM_OPN | SCM_RDNG | SCM_WRTNG,
288 gdb_input_port = scm_permanent_object (port);