gdb/guile/guile-internal.h

   1 /* Internal header for GDB/Scheme code.
   2
   3    Copyright (C) 2014 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   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
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  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.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 /* See README file in this directory for implementation notes, coding
  21    conventions, et.al.  */
  22
  23 #ifndef GDB_GUILE_INTERNAL_H
  24 #define GDB_GUILE_INTERNAL_H
  25
  26 #include "hashtab.h"
  27 #include "extension-priv.h"
  28 #include "symtab.h"
  29 #include "libguile.h"
  30
  31 struct block;
  32 struct frame_info;
  33 struct objfile;
  34 struct symbol;
  35
  36 /* A function to pass to the safe-call routines to ignore things like
  37    memory errors.  */
  38 typedef int excp_matcher_func (SCM key);
  39
  40 /* Scheme variables to define during initialization.  */
  41
  42 typedef struct
  43 {
  44   const char *name;
  45   SCM value;
  46   const char *doc_string;
  47 } scheme_variable;
  48
  49 /* End of scheme_variable table mark.  */
  50
  51 #define END_VARIABLES { NULL, SCM_BOOL_F, NULL }
  52
  53 /* Scheme functions to define during initialization.  */
  54
  55 typedef struct
  56 {
  57   const char *name;
  58   int required;
  59   int optional;
  60   int rest;
  61   scm_t_subr func;
  62   const char *doc_string;
  63 } scheme_function;
  64
  65 /* End of scheme_function table mark.  */
  66
  67 #define END_FUNCTIONS { NULL, 0, 0, 0, NULL, NULL }
  68
  69 /* Useful for defining a set of constants.  */
  70
  71 typedef struct
  72 {
  73   const char *name;
  74   int value;
  75 } scheme_integer_constant;
  76
  77 #define END_INTEGER_CONSTANTS { NULL, 0 }
  78
  79 /* Pass this instead of 0 to routines like SCM_ASSERT to indicate the value
  80    is not a function argument.  */
  81 #define GDBSCM_ARG_NONE 0
  82
  83 /* Ensure new code doesn't accidentally try to use this.  */
  84 #undef scm_make_smob_type
  85 #define scm_make_smob_type USE_gdbscm_make_smob_type_INSTEAD
  86
  87 /* They brought over () == #f from lisp.
  88    Let's avoid that for now.  */
  89 #undef scm_is_bool
  90 #undef scm_is_false
  91 #undef scm_is_true
  92 #define scm_is_bool USE_gdbscm_is_bool_INSTEAD
  93 #define scm_is_false USE_gdbscm_is_false_INSTEAD
  94 #define scm_is_true USE_gdbscm_is_true_INSTEAD
  95 #define gdbscm_is_bool(scm) \
  96   (scm_is_eq ((scm), SCM_BOOL_F) || scm_is_eq ((scm), SCM_BOOL_T))
  97 #define gdbscm_is_false(scm) scm_is_eq ((scm), SCM_BOOL_F)
  98 #define gdbscm_is_true(scm) (!gdbscm_is_false (scm))
  99
 100 /* Function name that is passed around in case an error needs to be reported.
 101    __func is in C99, but we provide a wrapper "just in case",
 102    and because FUNC_NAME is the canonical value used in guile sources.
 103    IWBN to use the Scheme version of the name (e.g. foo-bar vs foo_bar),
 104    but let's KISS for now.  */
 105 #define FUNC_NAME __func__
 106
 107 extern const char gdbscm_module_name[];
 108 extern const char gdbscm_init_module_name[];
 109
 110 extern int gdb_scheme_initialized;
 111
 112 extern const char gdbscm_print_excp_none[];
 113 extern const char gdbscm_print_excp_full[];
 114 extern const char gdbscm_print_excp_message[];
 115 extern const char *gdbscm_print_excp;
 116
 117 extern SCM gdbscm_documentation_symbol;
 118 extern SCM gdbscm_invalid_object_error_symbol;
 119
 120 extern SCM gdbscm_map_string;
 121 extern SCM gdbscm_array_string;
 122 extern SCM gdbscm_string_string;
 123 \f
 124 /* scm-utils.c */
 125
 126 extern void gdbscm_define_variables (const scheme_variable *, int public);
 127
 128 extern void gdbscm_define_functions (const scheme_function *, int public);
 129
 130 extern void gdbscm_define_integer_constants (const scheme_integer_constant *,
 131                                              int public);
 132
 133 extern void gdbscm_printf (SCM port, const char *format, ...);
 134
 135 extern void gdbscm_debug_display (SCM obj);
 136
 137 extern void gdbscm_debug_write (SCM obj);
 138
 139 extern void gdbscm_parse_function_args (const char *function_name,
 140                                         int beginning_arg_pos,
 141                                         const SCM *keywords,
 142                                         const char *format, ...);
 143
 144 extern SCM gdbscm_scm_from_longest (LONGEST l);
 145
 146 extern LONGEST gdbscm_scm_to_longest (SCM l);
 147
 148 extern SCM gdbscm_scm_from_ulongest (ULONGEST l);
 149
 150 extern ULONGEST gdbscm_scm_to_ulongest (SCM u);
 151
 152 extern void gdbscm_dynwind_xfree (void *ptr);
 153
 154 extern int gdbscm_is_procedure (SCM proc);
 155 \f
 156 /* GDB smobs, from scm-smob.c */
 157
 158 /* All gdb smobs must contain one of the following as the first member:
 159    gdb_smob, chained_gdb_smob, or eqable_gdb_smob.
 160
 161    The next,prev members of chained_gdb_smob allow for chaining gsmobs
 162    together so that, for example, when an objfile is deleted we can clean up
 163    all smobs that reference it.
 164
 165    The containing_scm member of eqable_gdb_smob allows for returning the
 166    same gsmob instead of creating a new one, allowing them to be eq?-able.
 167
 168    IMPORTANT: chained_gdb_smob and eqable_gdb-smob are a "subclasses" of
 169    gdb_smob.  The layout of chained_gdb_smob,eqable_gdb_smob must match
 170    gdb_smob as if it is a subclass.  To that end we use macro GDB_SMOB_HEAD
 171    to ensure this.  */
 172
 173 #define GDB_SMOB_HEAD                                   \
 174   /* Property list for externally added fields.  */     \
 175   SCM properties;
 176
 177 typedef struct
 178 {
 179   GDB_SMOB_HEAD
 180 } gdb_smob;
 181
 182 typedef struct _chained_gdb_smob
 183 {
 184   GDB_SMOB_HEAD
 185
 186   struct _chained_gdb_smob *prev;
 187   struct _chained_gdb_smob *next;
 188 } chained_gdb_smob;
 189
 190 typedef struct _eqable_gdb_smob
 191 {
 192   GDB_SMOB_HEAD
 193
 194   /* The object we are contained in.
 195      This can be used for several purposes.
 196      This is used by the eq? machinery:  We need to be able to see if we have
 197      already created an object for a symbol, and if so use that SCM.
 198      This may also be used to protect the smob from GC if there is
 199      a reference to this smob from outside of GC space (i.e., from gdb).
 200      This can also be used in place of chained_gdb_smob where we need to
 201      keep track of objfile referencing objects.  When the objfile is deleted
 202      we need to invalidate the objects: we can do that using the same hashtab
 203      used to record the smob for eq-ability.  */
 204   SCM containing_scm;
 205 } eqable_gdb_smob;
 206
 207 #undef GDB_SMOB_HEAD
 208
 209 struct objfile;
 210 struct objfile_data;
 211
 212 /* A predicate that returns non-zero if an object is a particular kind
 213    of gsmob.  */
 214 typedef int (gsmob_pred_func) (SCM);
 215
 216 extern scm_t_bits gdbscm_make_smob_type (const char *name, size_t size);
 217
 218 extern void gdbscm_init_gsmob (gdb_smob *base);
 219
 220 extern void gdbscm_init_chained_gsmob (chained_gdb_smob *base);
 221
 222 extern void gdbscm_init_eqable_gsmob (eqable_gdb_smob *base);
 223
 224 extern SCM gdbscm_mark_gsmob (gdb_smob *base);
 225
 226 extern SCM gdbscm_mark_chained_gsmob (chained_gdb_smob *base);
 227
 228 extern SCM gdbscm_mark_eqable_gsmob (eqable_gdb_smob *base);
 229
 230 extern void gdbscm_add_objfile_ref (struct objfile *objfile,
 231                                     const struct objfile_data *data_key,
 232                                     chained_gdb_smob *g_smob);
 233
 234 extern void gdbscm_remove_objfile_ref (struct objfile *objfile,
 235                                        const struct objfile_data *data_key,
 236                                        chained_gdb_smob *g_smob);
 237
 238 extern htab_t gdbscm_create_eqable_gsmob_ptr_map (htab_hash hash_fn,
 239                                                   htab_eq eq_fn);
 240
 241 extern eqable_gdb_smob **gdbscm_find_eqable_gsmob_ptr_slot
 242   (htab_t htab, eqable_gdb_smob *base);
 243
 244 extern void gdbscm_fill_eqable_gsmob_ptr_slot (eqable_gdb_smob **slot,
 245                                                eqable_gdb_smob *base,
 246                                                SCM containing_scm);
 247
 248 extern void gdbscm_clear_eqable_gsmob_ptr_slot (htab_t htab,
 249                                                 eqable_gdb_smob *base);
 250 \f
 251 /* Exceptions and calling out to Guile.  */
 252
 253 /* scm-exception.c */
 254
 255 extern SCM gdbscm_make_exception (SCM tag, SCM args);
 256
 257 extern int gdbscm_is_exception (SCM scm);
 258
 259 extern SCM gdbscm_exception_key (SCM excp);
 260
 261 extern SCM gdbscm_exception_args (SCM excp);
 262
 263 extern SCM gdbscm_make_exception_with_stack (SCM key, SCM args, SCM stack);
 264
 265 extern SCM gdbscm_make_error_scm (SCM key, SCM subr, SCM message,
 266                                   SCM args, SCM data);
 267
 268 extern SCM gdbscm_make_error (SCM key, const char *subr, const char *message,
 269                               SCM args, SCM data);
 270
 271 extern SCM gdbscm_make_type_error (const char *subr, int arg_pos,
 272                                    SCM bad_value, const char *expected_type);
 273
 274 extern SCM gdbscm_make_invalid_object_error (const char *subr, int arg_pos,
 275                                              SCM bad_value, const char *error);
 276
 277 extern SCM gdbscm_invalid_object_error (const char *subr, int arg_pos,
 278                                         SCM bad_value, const char *error)
 279    ATTRIBUTE_NORETURN;
 280
 281 extern SCM gdbscm_make_out_of_range_error (const char *subr, int arg_pos,
 282                                            SCM bad_value, const char *error);
 283
 284 extern SCM gdbscm_out_of_range_error (const char *subr, int arg_pos,
 285                                       SCM bad_value, const char *error)
 286    ATTRIBUTE_NORETURN;
 287
 288 extern SCM gdbscm_make_misc_error (const char *subr, int arg_pos,
 289                                    SCM bad_value, const char *error);
 290
 291 extern void gdbscm_throw (SCM exception) ATTRIBUTE_NORETURN;
 292
 293 extern SCM gdbscm_scm_from_gdb_exception (struct gdb_exception exception);
 294
 295 extern void gdbscm_throw_gdb_exception (struct gdb_exception exception)
 296   ATTRIBUTE_NORETURN;
 297
 298 extern void gdbscm_print_exception_with_stack (SCM port, SCM stack,
 299                                                SCM key, SCM args);
 300
 301 extern void gdbscm_print_gdb_exception (SCM port, SCM exception);
 302
 303 extern char *gdbscm_exception_message_to_string (SCM exception);
 304
 305 extern excp_matcher_func gdbscm_memory_error_p;
 306
 307 extern SCM gdbscm_make_memory_error (const char *subr, const char *msg,
 308                                      SCM args);
 309
 310 extern SCM gdbscm_memory_error (const char *subr, const char *msg, SCM args);
 311
 312 /* scm-safe-call.c */
 313
 314 extern void *gdbscm_with_guile (void *(*func) (void *), void *data);
 315
 316 extern SCM gdbscm_call_guile (SCM (*func) (void *), void *data,
 317                               excp_matcher_func *ok_excps);
 318
 319 extern SCM gdbscm_safe_call_0 (SCM proc, excp_matcher_func *ok_excps);
 320
 321 extern SCM gdbscm_safe_call_1 (SCM proc, SCM arg0,
 322                                excp_matcher_func *ok_excps);
 323
 324 extern SCM gdbscm_safe_call_2 (SCM proc, SCM arg0, SCM arg1,
 325                                excp_matcher_func *ok_excps);
 326
 327 extern SCM gdbscm_safe_call_3 (SCM proc, SCM arg0, SCM arg1, SCM arg2,
 328                                excp_matcher_func *ok_excps);
 329
 330 extern SCM gdbscm_safe_call_4 (SCM proc, SCM arg0, SCM arg1, SCM arg2,
 331                                SCM arg3,
 332                                excp_matcher_func *ok_excps);
 333
 334 extern SCM gdbscm_safe_apply_1 (SCM proc, SCM arg0, SCM args,
 335                                 excp_matcher_func *ok_excps);
 336
 337 extern SCM gdbscm_unsafe_call_1 (SCM proc, SCM arg0);
 338
 339 extern char *gdbscm_safe_eval_string (const char *string, int display_result);
 340
 341 extern char *gdbscm_safe_source_script (const char *filename);
 342
 343 extern void gdbscm_enter_repl (void);
 344 \f
 345 /* Interface to various GDB objects, in alphabetical order.  */
 346
 347 /* scm-arch.c */
 348
 349 typedef struct _arch_smob arch_smob;
 350
 351 extern struct gdbarch *arscm_get_gdbarch (arch_smob *a_smob);
 352
 353 extern arch_smob *arscm_get_arch_smob_arg_unsafe (SCM arch_scm, int arg_pos,
 354                                                   const char *func_name);
 355
 356 extern SCM arscm_scm_from_arch (struct gdbarch *gdbarch);
 357
 358 /* scm-block.c */
 359
 360 extern SCM bkscm_scm_from_block (const struct block *block,
 361                                  struct objfile *objfile);
 362
 363 extern const struct block *bkscm_scm_to_block
 364   (SCM block_scm, int arg_pos, const char *func_name, SCM *excp);
 365
 366 /* scm-frame.c */
 367
 368 typedef struct _frame_smob frame_smob;
 369
 370 extern int frscm_is_frame (SCM scm);
 371
 372 extern frame_smob *frscm_get_frame_smob_arg_unsafe (SCM frame_scm, int arg_pos,
 373                                                     const char *func_name);
 374
 375 extern struct frame_info *frscm_frame_smob_to_frame (frame_smob *);
 376
 377 /* scm-iterator.c */
 378
 379 typedef struct _iterator_smob iterator_smob;
 380
 381 extern SCM itscm_iterator_smob_object (iterator_smob *i_smob);
 382
 383 extern SCM itscm_iterator_smob_progress (iterator_smob *i_smob);
 384
 385 extern void itscm_set_iterator_smob_progress_x (iterator_smob *i_smob,
 386                                                 SCM progress);
 387
 388 extern const char *itscm_iterator_smob_name (void);
 389
 390 extern SCM gdbscm_make_iterator (SCM object, SCM progress, SCM next);
 391
 392 extern int itscm_is_iterator (SCM scm);
 393
 394 extern SCM gdbscm_end_of_iteration (void);
 395
 396 extern int itscm_is_end_of_iteration (SCM obj);
 397
 398 extern SCM itscm_safe_call_next_x (SCM iter, excp_matcher_func *ok_excps);
 399
 400 extern SCM itscm_get_iterator_arg_unsafe (SCM self, int arg_pos,
 401                                           const char *func_name);
 402
 403 /* scm-lazy-string.c */
 404
 405 extern int lsscm_is_lazy_string (SCM scm);
 406
 407 extern SCM lsscm_make_lazy_string (CORE_ADDR address, int length,
 408                                    const char *encoding, struct type *type);
 409
 410 extern struct value *lsscm_safe_lazy_string_to_value (SCM string,
 411                                                       int arg_pos,
 412                                                       const char *func_name,
 413                                                       SCM *except_scmp);
 414
 415 extern void lsscm_val_print_lazy_string
 416   (SCM string, struct ui_file *stream,
 417    const struct value_print_options *options);
 418
 419 /* scm-objfile.c */
 420
 421 typedef struct _objfile_smob objfile_smob;
 422
 423 extern SCM ofscm_objfile_smob_pretty_printers (objfile_smob *o_smob);
 424
 425 extern objfile_smob *ofscm_objfile_smob_from_objfile (struct objfile *objfile);
 426
 427 extern SCM ofscm_scm_from_objfile (struct objfile *objfile);
 428
 429 /* scm-string.c */
 430
 431 extern char *gdbscm_scm_to_c_string (SCM string);
 432
 433 extern SCM gdbscm_scm_from_c_string (const char *string);
 434
 435 extern SCM gdbscm_scm_from_printf (const char *format, ...);
 436
 437 extern char *gdbscm_scm_to_string (SCM string, size_t *lenp,
 438                                    const char *charset,
 439                                    int strict, SCM *except_scmp);
 440
 441 extern SCM gdbscm_scm_from_string (const char *string, size_t len,
 442                                    const char *charset, int strict);
 443
 444 extern char *gdbscm_scm_to_target_string_unsafe (SCM string, size_t *lenp,
 445                                                  struct gdbarch *gdbarch);
 446
 447 /* scm-symbol.c */
 448
 449 extern int syscm_is_symbol (SCM scm);
 450
 451 extern SCM syscm_scm_from_symbol (struct symbol *symbol);
 452
 453 extern struct symbol *syscm_get_valid_symbol_arg_unsafe
 454   (SCM self, int arg_pos, const char *func_name);
 455
 456 /* scm-symtab.c */
 457
 458 extern SCM stscm_scm_from_symtab (struct symtab *symtab);
 459
 460 extern SCM stscm_scm_from_sal (struct symtab_and_line sal);
 461
 462 /* scm-type.c */
 463
 464 typedef struct _type_smob type_smob;
 465
 466 extern int tyscm_is_type (SCM scm);
 467
 468 extern SCM tyscm_scm_from_type (struct type *type);
 469
 470 extern type_smob *tyscm_get_type_smob_arg_unsafe (SCM type_scm, int arg_pos,
 471                                                   const char *func_name);
 472
 473 extern struct type *tyscm_type_smob_type (type_smob *t_smob);
 474
 475 extern SCM tyscm_scm_from_field (SCM type_scm, int field_num);
 476
 477 /* scm-value.c */
 478
 479 extern struct value *vlscm_scm_to_value (SCM scm);
 480
 481 extern int vlscm_is_value (SCM scm);
 482
 483 extern SCM vlscm_scm_from_value (struct value *value);
 484
 485 extern SCM vlscm_scm_from_value_unsafe (struct value *value);
 486
 487 extern struct value *vlscm_convert_typed_value_from_scheme
 488   (const char *func_name, int obj_arg_pos, SCM obj,
 489    int type_arg_pos, SCM type_scm, struct type *type, SCM *except_scmp,
 490    struct gdbarch *gdbarch, const struct language_defn *language);
 491
 492 extern struct value *vlscm_convert_value_from_scheme
 493   (const char *func_name, int obj_arg_pos, SCM obj, SCM *except_scmp,
 494    struct gdbarch *gdbarch, const struct language_defn *language);
 495 \f
 496 /* stript_lang methods */
 497
 498 extern objfile_script_sourcer_func gdbscm_source_objfile_script;
 499
 500 extern int gdbscm_auto_load_enabled (const struct extension_language_defn *);
 501
 502 extern void gdbscm_preserve_values
 503   (const struct extension_language_defn *,
 504    struct objfile *, htab_t copied_types);
 505
 506 extern enum ext_lang_rc gdbscm_apply_val_pretty_printer
 507   (const struct extension_language_defn *,
 508    struct type *type, const gdb_byte *valaddr,
 509    int embedded_offset, CORE_ADDR address,
 510    struct ui_file *stream, int recurse,
 511    const struct value *val,
 512    const struct value_print_options *options,
 513    const struct language_defn *language);
 514
 515 extern int gdbscm_breakpoint_has_cond (const struct extension_language_defn *,
 516                                        struct breakpoint *b);
 517
 518 extern enum ext_lang_bp_stop gdbscm_breakpoint_cond_says_stop
 519   (const struct extension_language_defn *, struct breakpoint *b);
 520 \f
 521 /* Initializers for each piece of Scheme support, in alphabetical order.  */
 522
 523 extern void gdbscm_initialize_arches (void);
 524 extern void gdbscm_initialize_auto_load (void);
 525 extern void gdbscm_initialize_blocks (void);
 526 extern void gdbscm_initialize_breakpoints (void);
 527 extern void gdbscm_initialize_disasm (void);
 528 extern void gdbscm_initialize_exceptions (void);
 529 extern void gdbscm_initialize_frames (void);
 530 extern void gdbscm_initialize_iterators (void);
 531 extern void gdbscm_initialize_lazy_strings (void);
 532 extern void gdbscm_initialize_math (void);
 533 extern void gdbscm_initialize_objfiles (void);
 534 extern void gdbscm_initialize_pretty_printers (void);
 535 extern void gdbscm_initialize_ports (void);
 536 extern void gdbscm_initialize_smobs (void);
 537 extern void gdbscm_initialize_strings (void);
 538 extern void gdbscm_initialize_symbols (void);
 539 extern void gdbscm_initialize_symtabs (void);
 540 extern void gdbscm_initialize_types (void);
 541 extern void gdbscm_initialize_values (void);
 542 \f
 543 /* Use these after a TRY_CATCH to throw the appropriate Scheme exception
 544    if a GDB error occurred.  */
 545
 546 #define GDBSCM_HANDLE_GDB_EXCEPTION(exception)          \
 547   do {                                                  \
 548     if (exception.reason < 0)                           \
 549       {                                                 \
 550         gdbscm_throw_gdb_exception (exception);         \
 551         /*NOTREACHED */                                 \
 552       }                                                 \
 553   } while (0)
 554
 555 /* If cleanups are establish outside the TRY_CATCH block, use this version.  */
 556
 557 #define GDBSCM_HANDLE_GDB_EXCEPTION_WITH_CLEANUPS(exception, cleanups)  \
 558   do {                                                                  \
 559     if (exception.reason < 0)                                           \
 560       {                                                                 \
 561         do_cleanups (cleanups);                                         \
 562         gdbscm_throw_gdb_exception (exception);                         \
 563         /*NOTREACHED */                                                 \
 564       }                                                                 \
 565   } while (0)
 566
 567 #endif /* GDB_GUILE_INTERNAL_H */