--- /dev/null
+/* GDB interface for Guile
+ * Copyright (C) 1996,1997,1999,2000,2001,2002,2004
+ * Free Software Foundation, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include "libguile/_scm.h"
+
+#include <stdio.h>
+#include <string.h>
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#include "libguile/strports.h"
+#include "libguile/read.h"
+#include "libguile/eval.h"
+#include "libguile/chars.h"
+#include "libguile/modules.h"
+#include "libguile/ports.h"
+#include "libguile/fluids.h"
+#include "libguile/strings.h"
+#include "libguile/init.h"
+
+#include "libguile/gdbint.h"
+\f
+/* {Support for debugging with gdb}
+ *
+ * TODO:
+ *
+ * 1. Redirect outputs
+ * 2. Catch errors
+ * 3. Prevent print from causing segmentation fault when given broken pairs
+ */
+
+#define GDB_TYPE SCM
+
+#include "libguile/gdb_interface.h"
+
+\f
+
+/* Be carefull when this macro is true.
+ scm_gc_running_p is set during gc.
+ */
+#define SCM_GC_P (scm_gc_running_p)
+
+/* Macros that encapsulate blocks of code which can be called by the
+ * debugger.
+ */
+#define SCM_BEGIN_FOREIGN_BLOCK \
+do { \
+ scm_print_carefully_p = 1; \
+} while (0)
+
+
+#define SCM_END_FOREIGN_BLOCK \
+do { \
+ scm_print_carefully_p = 0; \
+} while (0)
+
+
+#define RESET_STRING { gdb_output_length = 0; }
+
+#define SEND_STRING(str) \
+do { \
+ gdb_output = (char *) (str); \
+ gdb_output_length = strlen ((const char *) (str)); \
+} while (0)
+
+
+/* {Gdb interface}
+ */
+
+unsigned short gdb_options = GDB_HAVE_BINDINGS;
+
+char *gdb_language = "lisp/c";
+
+SCM gdb_result;
+
+char *gdb_output;
+
+int gdb_output_length;
+
+int scm_print_carefully_p;
+
+static SCM gdb_input_port;
+static int port_mark_p, stream_mark_p, string_mark_p;
+
+static SCM gdb_output_port;
+
+
+static void
+unmark_port (SCM port)
+{
+ SCM stream, string;
+ port_mark_p = SCM_GC_MARK_P (port);
+ SCM_CLEAR_GC_MARK (port);
+ stream = SCM_PACK (SCM_STREAM (port));
+ stream_mark_p = SCM_GC_MARK_P (stream);
+ SCM_CLEAR_GC_MARK (stream);
+ string = SCM_CDR (stream);
+ string_mark_p = SCM_GC_MARK_P (string);
+ SCM_CLEAR_GC_MARK (string);
+}
+
+
+static void
+remark_port (SCM port)
+{
+ SCM stream = SCM_PACK (SCM_STREAM (port));
+ SCM string = SCM_CDR (stream);
+ if (string_mark_p)
+ SCM_SET_GC_MARK (string);
+ if (stream_mark_p)
+ SCM_SET_GC_MARK (stream);
+ if (port_mark_p)
+ SCM_SET_GC_MARK (port);
+}
+
+
+int
+gdb_maybe_valid_type_p (SCM value)
+{
+ return SCM_IMP (value) || scm_in_heap_p (value);
+}
+
+
+int
+gdb_read (char *str)
+{
+ SCM ans;
+ int status = 0;
+ RESET_STRING;
+ /* Need to be restrictive about what to read? */
+ if (SCM_GC_P)
+ {
+ char *p;
+ for (p = str; *p != '\0'; ++p)
+ switch (*p)
+ {
+ case '(':
+ case '\'':
+ case '"':
+ SEND_STRING ("Can't read this kind of expressions during gc");
+ return -1;
+ case '#':
+ if (*++p == '\0')
+ goto premature;
+ if (*p == '\\')
+ {
+ if (*++p != '\0')
+ continue;
+ premature:
+ SEND_STRING ("Premature end of lisp expression");
+ return -1;
+ }
+ default:
+ continue;
+ }
+ }
+ SCM_BEGIN_FOREIGN_BLOCK;
+ unmark_port (gdb_input_port);
+ scm_seek (gdb_input_port, SCM_INUM0, scm_from_int (SEEK_SET));
+ scm_puts (str, gdb_input_port);
+ scm_truncate_file (gdb_input_port, SCM_UNDEFINED);
+ scm_seek (gdb_input_port, SCM_INUM0, scm_from_int (SEEK_SET));
+
+ /* Read one object */
+ ans = scm_read (gdb_input_port);
+ if (SCM_GC_P)
+ {
+ if (SCM_NIMP (ans))
+ {
+ SEND_STRING ("Non-immediate created during gc. Memory may be trashed.");
+ status = -1;
+ goto exit;
+ }
+ }
+ gdb_result = ans;
+ /* Protect answer from future GC */
+ if (SCM_NIMP (ans))
+ scm_permanent_object (ans);
+exit:
+ remark_port (gdb_input_port);
+ SCM_END_FOREIGN_BLOCK;
+ return status;
+}
+
+
+int
+gdb_eval (SCM exp)
+{
+ RESET_STRING;
+ if (SCM_GC_P)
+ {
+ SEND_STRING ("Can't evaluate lisp expressions during gc");
+ return -1;
+ }
+ SCM_BEGIN_FOREIGN_BLOCK;
+ {
+ SCM env = scm_top_level_env (SCM_TOP_LEVEL_LOOKUP_CLOSURE);
+ gdb_result = scm_permanent_object (scm_i_eval_x (exp, env));
+ }
+ SCM_END_FOREIGN_BLOCK;
+ return 0;
+}
+
+
+int
+gdb_print (SCM obj)
+{
+ if (!scm_initialized_p)
+ SEND_STRING ("*** Guile not initialized ***");
+ else
+ {
+ RESET_STRING;
+ SCM_BEGIN_FOREIGN_BLOCK;
+ /* Reset stream */
+ scm_seek (gdb_output_port, SCM_INUM0, scm_from_int (SEEK_SET));
+ scm_write (obj, gdb_output_port);
+ scm_truncate_file (gdb_output_port, SCM_UNDEFINED);
+ {
+ scm_t_port *pt = SCM_PTAB_ENTRY (gdb_output_port);
+
+ scm_flush (gdb_output_port);
+ *(pt->write_buf + pt->read_buf_size) = 0;
+ SEND_STRING (pt->read_buf);
+ }
+ SCM_END_FOREIGN_BLOCK;
+ }
+ return 0;
+}
+
+
+int
+gdb_binding (SCM name, SCM value)
+{
+ RESET_STRING;
+ if (SCM_GC_P)
+ {
+ SEND_STRING ("Can't create new bindings during gc");
+ return -1;
+ }
+ SCM_BEGIN_FOREIGN_BLOCK;
+ {
+ SCM var = scm_sym2var (name, SCM_TOP_LEVEL_LOOKUP_CLOSURE, SCM_BOOL_T);
+ SCM_VARIABLE_SET (var, value);
+ }
+ SCM_END_FOREIGN_BLOCK;
+ return 0;
+}
+
+void
+scm_init_gdbint ()
+{
+ static char *s = "scm_init_gdb_interface";
+ SCM port;
+
+ scm_print_carefully_p = 0;
+
+ port = scm_mkstrport (SCM_INUM0,
+ scm_c_make_string (0, SCM_UNDEFINED),
+ SCM_OPN | SCM_WRTNG,
+ s);
+ gdb_output_port = scm_permanent_object (port);
+
+ port = scm_mkstrport (SCM_INUM0,
+ scm_c_make_string (0, SCM_UNDEFINED),
+ SCM_OPN | SCM_RDNG | SCM_WRTNG,
+ s);
+ gdb_input_port = scm_permanent_object (port);
+}
+
+/*
+ Local Variables:
+ c-file-style: "gnu"
+ End:
+*/
projects / lilypond.git / blobdiff