| 1 | /* General Compile and inject code |
| 2 | |
| 3 | Copyright (C) 2014-2017 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 | #include "defs.h" |
| 21 | #include "top.h" |
| 22 | #include "ui-out.h" |
| 23 | #include "command.h" |
| 24 | #include "cli/cli-script.h" |
| 25 | #include "cli/cli-utils.h" |
| 26 | #include "completer.h" |
| 27 | #include "gdbcmd.h" |
| 28 | #include "compile.h" |
| 29 | #include "compile-internal.h" |
| 30 | #include "compile-object-load.h" |
| 31 | #include "compile-object-run.h" |
| 32 | #include "language.h" |
| 33 | #include "frame.h" |
| 34 | #include "source.h" |
| 35 | #include "block.h" |
| 36 | #include "arch-utils.h" |
| 37 | #include "filestuff.h" |
| 38 | #include "target.h" |
| 39 | #include "osabi.h" |
| 40 | #include "gdb_wait.h" |
| 41 | #include "valprint.h" |
| 42 | #include "common/gdb_optional.h" |
| 43 | #include "common/gdb_unlinker.h" |
| 44 | |
| 45 | \f |
| 46 | |
| 47 | /* Initial filename for temporary files. */ |
| 48 | |
| 49 | #define TMP_PREFIX "/tmp/gdbobj-" |
| 50 | |
| 51 | /* Hold "compile" commands. */ |
| 52 | |
| 53 | static struct cmd_list_element *compile_command_list; |
| 54 | |
| 55 | /* Debug flag for "compile" commands. */ |
| 56 | |
| 57 | int compile_debug; |
| 58 | |
| 59 | /* Implement "show debug compile". */ |
| 60 | |
| 61 | static void |
| 62 | show_compile_debug (struct ui_file *file, int from_tty, |
| 63 | struct cmd_list_element *c, const char *value) |
| 64 | { |
| 65 | fprintf_filtered (file, _("Compile debugging is %s.\n"), value); |
| 66 | } |
| 67 | |
| 68 | \f |
| 69 | |
| 70 | /* Check *ARG for a "-raw" or "-r" argument. Return 0 if not seen. |
| 71 | Return 1 if seen and update *ARG. */ |
| 72 | |
| 73 | static int |
| 74 | check_raw_argument (const char **arg) |
| 75 | { |
| 76 | *arg = skip_spaces (*arg); |
| 77 | |
| 78 | if (arg != NULL |
| 79 | && (check_for_argument (arg, "-raw", sizeof ("-raw") - 1) |
| 80 | || check_for_argument (arg, "-r", sizeof ("-r") - 1))) |
| 81 | return 1; |
| 82 | return 0; |
| 83 | } |
| 84 | |
| 85 | /* Handle the input from the 'compile file' command. The "compile |
| 86 | file" command is used to evaluate an expression contained in a file |
| 87 | that may contain calls to the GCC compiler. */ |
| 88 | |
| 89 | static void |
| 90 | compile_file_command (const char *arg, int from_tty) |
| 91 | { |
| 92 | enum compile_i_scope_types scope = COMPILE_I_SIMPLE_SCOPE; |
| 93 | |
| 94 | scoped_restore save_async = make_scoped_restore (¤t_ui->async, 0); |
| 95 | |
| 96 | /* Check the user did not just <enter> after command. */ |
| 97 | if (arg == NULL) |
| 98 | error (_("You must provide a filename for this command.")); |
| 99 | |
| 100 | /* Check if a raw (-r|-raw) argument is provided. */ |
| 101 | if (arg != NULL && check_raw_argument (&arg)) |
| 102 | { |
| 103 | scope = COMPILE_I_RAW_SCOPE; |
| 104 | arg = skip_spaces (arg); |
| 105 | } |
| 106 | |
| 107 | /* After processing arguments, check there is a filename at the end |
| 108 | of the command. */ |
| 109 | if (arg[0] == '\0') |
| 110 | error (_("You must provide a filename with the raw option set.")); |
| 111 | |
| 112 | if (arg[0] == '-') |
| 113 | error (_("Unknown argument specified.")); |
| 114 | |
| 115 | arg = skip_spaces (arg); |
| 116 | gdb::unique_xmalloc_ptr<char> abspath = gdb_abspath (arg); |
| 117 | std::string buffer = string_printf ("#include \"%s\"\n", abspath.get ()); |
| 118 | eval_compile_command (NULL, buffer.c_str (), scope, NULL); |
| 119 | } |
| 120 | |
| 121 | /* Handle the input from the 'compile code' command. The |
| 122 | "compile code" command is used to evaluate an expression that may |
| 123 | contain calls to the GCC compiler. The language expected in this |
| 124 | compile command is the language currently set in GDB. */ |
| 125 | |
| 126 | static void |
| 127 | compile_code_command (const char *arg, int from_tty) |
| 128 | { |
| 129 | enum compile_i_scope_types scope = COMPILE_I_SIMPLE_SCOPE; |
| 130 | |
| 131 | scoped_restore save_async = make_scoped_restore (¤t_ui->async, 0); |
| 132 | |
| 133 | if (arg != NULL && check_raw_argument (&arg)) |
| 134 | { |
| 135 | scope = COMPILE_I_RAW_SCOPE; |
| 136 | arg = skip_spaces (arg); |
| 137 | } |
| 138 | |
| 139 | arg = skip_spaces (arg); |
| 140 | |
| 141 | if (arg != NULL && !check_for_argument (&arg, "--", sizeof ("--") - 1)) |
| 142 | { |
| 143 | if (arg[0] == '-') |
| 144 | error (_("Unknown argument specified.")); |
| 145 | } |
| 146 | |
| 147 | if (arg && *arg) |
| 148 | eval_compile_command (NULL, arg, scope, NULL); |
| 149 | else |
| 150 | { |
| 151 | command_line_up l = get_command_line (compile_control, ""); |
| 152 | |
| 153 | l->control_u.compile.scope = scope; |
| 154 | execute_control_command_untraced (l.get ()); |
| 155 | } |
| 156 | } |
| 157 | |
| 158 | /* Callback for compile_print_command. */ |
| 159 | |
| 160 | void |
| 161 | compile_print_value (struct value *val, void *data_voidp) |
| 162 | { |
| 163 | const struct format_data *fmtp = (const struct format_data *) data_voidp; |
| 164 | |
| 165 | print_value (val, fmtp); |
| 166 | } |
| 167 | |
| 168 | /* Handle the input from the 'compile print' command. The "compile |
| 169 | print" command is used to evaluate and print an expression that may |
| 170 | contain calls to the GCC compiler. The language expected in this |
| 171 | compile command is the language currently set in GDB. */ |
| 172 | |
| 173 | static void |
| 174 | compile_print_command (const char *arg, int from_tty) |
| 175 | { |
| 176 | enum compile_i_scope_types scope = COMPILE_I_PRINT_ADDRESS_SCOPE; |
| 177 | struct format_data fmt; |
| 178 | |
| 179 | scoped_restore save_async = make_scoped_restore (¤t_ui->async, 0); |
| 180 | |
| 181 | /* Passing &FMT as SCOPE_DATA is safe as do_module_cleanup will not |
| 182 | touch the stale pointer if compile_object_run has already quit. */ |
| 183 | print_command_parse_format (&arg, "compile print", &fmt); |
| 184 | |
| 185 | if (arg && *arg) |
| 186 | eval_compile_command (NULL, arg, scope, &fmt); |
| 187 | else |
| 188 | { |
| 189 | command_line_up l = get_command_line (compile_control, ""); |
| 190 | |
| 191 | l->control_u.compile.scope = scope; |
| 192 | l->control_u.compile.scope_data = &fmt; |
| 193 | execute_control_command_untraced (l.get ()); |
| 194 | } |
| 195 | } |
| 196 | |
| 197 | /* A cleanup function to remove a directory and all its contents. */ |
| 198 | |
| 199 | static void |
| 200 | do_rmdir (void *arg) |
| 201 | { |
| 202 | const char *dir = (const char *) arg; |
| 203 | char *zap; |
| 204 | int wstat; |
| 205 | |
| 206 | gdb_assert (startswith (dir, TMP_PREFIX)); |
| 207 | zap = concat ("rm -rf ", dir, (char *) NULL); |
| 208 | wstat = system (zap); |
| 209 | if (wstat == -1 || !WIFEXITED (wstat) || WEXITSTATUS (wstat) != 0) |
| 210 | warning (_("Could not remove temporary directory %s"), dir); |
| 211 | XDELETEVEC (zap); |
| 212 | } |
| 213 | |
| 214 | /* Return the name of the temporary directory to use for .o files, and |
| 215 | arrange for the directory to be removed at shutdown. */ |
| 216 | |
| 217 | static const char * |
| 218 | get_compile_file_tempdir (void) |
| 219 | { |
| 220 | static char *tempdir_name; |
| 221 | |
| 222 | #define TEMPLATE TMP_PREFIX "XXXXXX" |
| 223 | char tname[sizeof (TEMPLATE)]; |
| 224 | |
| 225 | if (tempdir_name != NULL) |
| 226 | return tempdir_name; |
| 227 | |
| 228 | strcpy (tname, TEMPLATE); |
| 229 | #undef TEMPLATE |
| 230 | #ifdef HAVE_MKDTEMP |
| 231 | tempdir_name = mkdtemp (tname); |
| 232 | #else |
| 233 | error (_("Command not supported on this host.")); |
| 234 | #endif |
| 235 | if (tempdir_name == NULL) |
| 236 | perror_with_name (_("Could not make temporary directory")); |
| 237 | |
| 238 | tempdir_name = xstrdup (tempdir_name); |
| 239 | make_final_cleanup (do_rmdir, tempdir_name); |
| 240 | return tempdir_name; |
| 241 | } |
| 242 | |
| 243 | /* Compute the names of source and object files to use. */ |
| 244 | |
| 245 | static compile_file_names |
| 246 | get_new_file_names () |
| 247 | { |
| 248 | static int seq; |
| 249 | const char *dir = get_compile_file_tempdir (); |
| 250 | |
| 251 | ++seq; |
| 252 | |
| 253 | return compile_file_names (string_printf ("%s%sout%d.c", |
| 254 | dir, SLASH_STRING, seq), |
| 255 | string_printf ("%s%sout%d.o", |
| 256 | dir, SLASH_STRING, seq)); |
| 257 | } |
| 258 | |
| 259 | /* Get the block and PC at which to evaluate an expression. */ |
| 260 | |
| 261 | static const struct block * |
| 262 | get_expr_block_and_pc (CORE_ADDR *pc) |
| 263 | { |
| 264 | const struct block *block = get_selected_block (pc); |
| 265 | |
| 266 | if (block == NULL) |
| 267 | { |
| 268 | struct symtab_and_line cursal = get_current_source_symtab_and_line (); |
| 269 | |
| 270 | if (cursal.symtab) |
| 271 | block = BLOCKVECTOR_BLOCK (SYMTAB_BLOCKVECTOR (cursal.symtab), |
| 272 | STATIC_BLOCK); |
| 273 | if (block != NULL) |
| 274 | *pc = BLOCK_START (block); |
| 275 | } |
| 276 | else |
| 277 | *pc = BLOCK_START (block); |
| 278 | |
| 279 | return block; |
| 280 | } |
| 281 | |
| 282 | /* Call buildargv (via gdb_argv), set its result for S into *ARGVP but |
| 283 | calculate also the number of parsed arguments into *ARGCP. If |
| 284 | buildargv has returned NULL then *ARGCP is set to zero. */ |
| 285 | |
| 286 | static void |
| 287 | build_argc_argv (const char *s, int *argcp, char ***argvp) |
| 288 | { |
| 289 | gdb_argv args (s); |
| 290 | |
| 291 | *argcp = args.count (); |
| 292 | *argvp = args.release (); |
| 293 | } |
| 294 | |
| 295 | /* String for 'set compile-args' and 'show compile-args'. */ |
| 296 | static char *compile_args; |
| 297 | |
| 298 | /* Parsed form of COMPILE_ARGS. COMPILE_ARGS_ARGV is NULL terminated. */ |
| 299 | static int compile_args_argc; |
| 300 | static char **compile_args_argv; |
| 301 | |
| 302 | /* Implement 'set compile-args'. */ |
| 303 | |
| 304 | static void |
| 305 | set_compile_args (char *args, int from_tty, struct cmd_list_element *c) |
| 306 | { |
| 307 | freeargv (compile_args_argv); |
| 308 | build_argc_argv (compile_args, &compile_args_argc, &compile_args_argv); |
| 309 | } |
| 310 | |
| 311 | /* Implement 'show compile-args'. */ |
| 312 | |
| 313 | static void |
| 314 | show_compile_args (struct ui_file *file, int from_tty, |
| 315 | struct cmd_list_element *c, const char *value) |
| 316 | { |
| 317 | fprintf_filtered (file, _("Compile command command-line arguments " |
| 318 | "are \"%s\".\n"), |
| 319 | value); |
| 320 | } |
| 321 | |
| 322 | /* Append ARGC and ARGV (as parsed by build_argc_argv) to *ARGCP and *ARGVP. |
| 323 | ARGCP+ARGVP can be zero+NULL and also ARGC+ARGV can be zero+NULL. */ |
| 324 | |
| 325 | static void |
| 326 | append_args (int *argcp, char ***argvp, int argc, char **argv) |
| 327 | { |
| 328 | int argi; |
| 329 | |
| 330 | *argvp = XRESIZEVEC (char *, *argvp, (*argcp + argc + 1)); |
| 331 | |
| 332 | for (argi = 0; argi < argc; argi++) |
| 333 | (*argvp)[(*argcp)++] = xstrdup (argv[argi]); |
| 334 | (*argvp)[(*argcp)] = NULL; |
| 335 | } |
| 336 | |
| 337 | /* String for 'set compile-gcc' and 'show compile-gcc'. */ |
| 338 | static char *compile_gcc; |
| 339 | |
| 340 | /* Implement 'show compile-gcc'. */ |
| 341 | |
| 342 | static void |
| 343 | show_compile_gcc (struct ui_file *file, int from_tty, |
| 344 | struct cmd_list_element *c, const char *value) |
| 345 | { |
| 346 | fprintf_filtered (file, _("Compile command GCC driver filename is \"%s\".\n"), |
| 347 | value); |
| 348 | } |
| 349 | |
| 350 | /* Return DW_AT_producer parsed for get_selected_frame () (if any). |
| 351 | Return NULL otherwise. |
| 352 | |
| 353 | GCC already filters its command-line arguments only for the suitable ones to |
| 354 | put into DW_AT_producer - see GCC function gen_producer_string. */ |
| 355 | |
| 356 | static const char * |
| 357 | get_selected_pc_producer_options (void) |
| 358 | { |
| 359 | CORE_ADDR pc = get_frame_pc (get_selected_frame (NULL)); |
| 360 | struct compunit_symtab *symtab = find_pc_compunit_symtab (pc); |
| 361 | const char *cs; |
| 362 | |
| 363 | if (symtab == NULL || symtab->producer == NULL |
| 364 | || !startswith (symtab->producer, "GNU ")) |
| 365 | return NULL; |
| 366 | |
| 367 | cs = symtab->producer; |
| 368 | while (*cs != 0 && *cs != '-') |
| 369 | cs = skip_spaces (skip_to_space (cs)); |
| 370 | if (*cs != '-') |
| 371 | return NULL; |
| 372 | return cs; |
| 373 | } |
| 374 | |
| 375 | /* Filter out unwanted options from *ARGCP and ARGV. */ |
| 376 | |
| 377 | static void |
| 378 | filter_args (int *argcp, char **argv) |
| 379 | { |
| 380 | char **destv; |
| 381 | |
| 382 | for (destv = argv; *argv != NULL; argv++) |
| 383 | { |
| 384 | /* -fpreprocessed may get in commonly from ccache. */ |
| 385 | if (strcmp (*argv, "-fpreprocessed") == 0) |
| 386 | { |
| 387 | xfree (*argv); |
| 388 | (*argcp)--; |
| 389 | continue; |
| 390 | } |
| 391 | *destv++ = *argv; |
| 392 | } |
| 393 | *destv = NULL; |
| 394 | } |
| 395 | |
| 396 | /* Produce final vector of GCC compilation options. First element is target |
| 397 | size ("-m64", "-m32" etc.), optionally followed by DW_AT_producer options |
| 398 | and then compile-args string GDB variable. */ |
| 399 | |
| 400 | static void |
| 401 | get_args (const struct compile_instance *compiler, struct gdbarch *gdbarch, |
| 402 | int *argcp, char ***argvp) |
| 403 | { |
| 404 | const char *cs_producer_options; |
| 405 | int argc_compiler; |
| 406 | char **argv_compiler; |
| 407 | |
| 408 | build_argc_argv (gdbarch_gcc_target_options (gdbarch), |
| 409 | argcp, argvp); |
| 410 | |
| 411 | cs_producer_options = get_selected_pc_producer_options (); |
| 412 | if (cs_producer_options != NULL) |
| 413 | { |
| 414 | int argc_producer; |
| 415 | char **argv_producer; |
| 416 | |
| 417 | build_argc_argv (cs_producer_options, &argc_producer, &argv_producer); |
| 418 | filter_args (&argc_producer, argv_producer); |
| 419 | append_args (argcp, argvp, argc_producer, argv_producer); |
| 420 | freeargv (argv_producer); |
| 421 | } |
| 422 | |
| 423 | build_argc_argv (compiler->gcc_target_options, |
| 424 | &argc_compiler, &argv_compiler); |
| 425 | append_args (argcp, argvp, argc_compiler, argv_compiler); |
| 426 | freeargv (argv_compiler); |
| 427 | |
| 428 | append_args (argcp, argvp, compile_args_argc, compile_args_argv); |
| 429 | } |
| 430 | |
| 431 | /* A cleanup function to destroy a gdb_gcc_instance. */ |
| 432 | |
| 433 | static void |
| 434 | cleanup_compile_instance (void *arg) |
| 435 | { |
| 436 | struct compile_instance *inst = (struct compile_instance *) arg; |
| 437 | |
| 438 | inst->destroy (inst); |
| 439 | } |
| 440 | |
| 441 | /* A helper function suitable for use as the "print_callback" in the |
| 442 | compiler object. */ |
| 443 | |
| 444 | static void |
| 445 | print_callback (void *ignore, const char *message) |
| 446 | { |
| 447 | fputs_filtered (message, gdb_stderr); |
| 448 | } |
| 449 | |
| 450 | /* Process the compilation request. On success it returns the object |
| 451 | and source file names. On an error condition, error () is |
| 452 | called. */ |
| 453 | |
| 454 | static compile_file_names |
| 455 | compile_to_object (struct command_line *cmd, const char *cmd_string, |
| 456 | enum compile_i_scope_types scope) |
| 457 | { |
| 458 | struct compile_instance *compiler; |
| 459 | struct cleanup *cleanup; |
| 460 | const struct block *expr_block; |
| 461 | CORE_ADDR trash_pc, expr_pc; |
| 462 | int argc; |
| 463 | char **argv; |
| 464 | int ok; |
| 465 | FILE *src; |
| 466 | struct gdbarch *gdbarch = get_current_arch (); |
| 467 | char *triplet_rx; |
| 468 | char *error_message; |
| 469 | |
| 470 | if (!target_has_execution) |
| 471 | error (_("The program must be running for the compile command to "\ |
| 472 | "work.")); |
| 473 | |
| 474 | expr_block = get_expr_block_and_pc (&trash_pc); |
| 475 | expr_pc = get_frame_address_in_block (get_selected_frame (NULL)); |
| 476 | |
| 477 | /* Set up instance and context for the compiler. */ |
| 478 | if (current_language->la_get_compile_instance == NULL) |
| 479 | error (_("No compiler support for language %s."), |
| 480 | current_language->la_name); |
| 481 | compiler = current_language->la_get_compile_instance (); |
| 482 | cleanup = make_cleanup (cleanup_compile_instance, compiler); |
| 483 | |
| 484 | compiler->fe->ops->set_print_callback (compiler->fe, print_callback, NULL); |
| 485 | |
| 486 | compiler->scope = scope; |
| 487 | compiler->block = expr_block; |
| 488 | |
| 489 | /* From the provided expression, build a scope to pass to the |
| 490 | compiler. */ |
| 491 | |
| 492 | string_file input_buf; |
| 493 | const char *input; |
| 494 | |
| 495 | if (cmd != NULL) |
| 496 | { |
| 497 | struct command_line *iter; |
| 498 | |
| 499 | for (iter = cmd->body_list[0]; iter; iter = iter->next) |
| 500 | { |
| 501 | input_buf.puts (iter->line); |
| 502 | input_buf.puts ("\n"); |
| 503 | } |
| 504 | |
| 505 | input = input_buf.c_str (); |
| 506 | } |
| 507 | else if (cmd_string != NULL) |
| 508 | input = cmd_string; |
| 509 | else |
| 510 | error (_("Neither a simple expression, or a multi-line specified.")); |
| 511 | |
| 512 | std::string code |
| 513 | = current_language->la_compute_program (compiler, input, gdbarch, |
| 514 | expr_block, expr_pc); |
| 515 | if (compile_debug) |
| 516 | fprintf_unfiltered (gdb_stdlog, "debug output:\n\n%s", code.c_str ()); |
| 517 | |
| 518 | if (compiler->fe->ops->version >= GCC_FE_VERSION_1) |
| 519 | compiler->fe->ops->set_verbose (compiler->fe, compile_debug); |
| 520 | |
| 521 | if (compile_gcc[0] != 0) |
| 522 | { |
| 523 | if (compiler->fe->ops->version < GCC_FE_VERSION_1) |
| 524 | error (_("Command 'set compile-gcc' requires GCC version 6 or higher " |
| 525 | "(libcc1 interface version 1 or higher)")); |
| 526 | |
| 527 | compiler->fe->ops->set_driver_filename (compiler->fe, compile_gcc); |
| 528 | } |
| 529 | else |
| 530 | { |
| 531 | const char *os_rx = osabi_triplet_regexp (gdbarch_osabi (gdbarch)); |
| 532 | const char *arch_rx = gdbarch_gnu_triplet_regexp (gdbarch); |
| 533 | |
| 534 | /* Allow triplets with or without vendor set. */ |
| 535 | triplet_rx = concat (arch_rx, "(-[^-]*)?-", os_rx, (char *) NULL); |
| 536 | make_cleanup (xfree, triplet_rx); |
| 537 | |
| 538 | if (compiler->fe->ops->version >= GCC_FE_VERSION_1) |
| 539 | compiler->fe->ops->set_triplet_regexp (compiler->fe, triplet_rx); |
| 540 | } |
| 541 | |
| 542 | /* Set compiler command-line arguments. */ |
| 543 | get_args (compiler, gdbarch, &argc, &argv); |
| 544 | gdb_argv argv_holder (argv); |
| 545 | |
| 546 | if (compiler->fe->ops->version >= GCC_FE_VERSION_1) |
| 547 | error_message = compiler->fe->ops->set_arguments (compiler->fe, argc, argv); |
| 548 | else |
| 549 | error_message = compiler->fe->ops->set_arguments_v0 (compiler->fe, triplet_rx, |
| 550 | argc, argv); |
| 551 | if (error_message != NULL) |
| 552 | { |
| 553 | make_cleanup (xfree, error_message); |
| 554 | error ("%s", error_message); |
| 555 | } |
| 556 | |
| 557 | if (compile_debug) |
| 558 | { |
| 559 | int argi; |
| 560 | |
| 561 | fprintf_unfiltered (gdb_stdlog, "Passing %d compiler options:\n", argc); |
| 562 | for (argi = 0; argi < argc; argi++) |
| 563 | fprintf_unfiltered (gdb_stdlog, "Compiler option %d: <%s>\n", |
| 564 | argi, argv[argi]); |
| 565 | } |
| 566 | |
| 567 | compile_file_names fnames = get_new_file_names (); |
| 568 | |
| 569 | gdb::optional<gdb::unlinker> source_remover; |
| 570 | |
| 571 | { |
| 572 | gdb_file_up src = gdb_fopen_cloexec (fnames.source_file (), "w"); |
| 573 | if (src == NULL) |
| 574 | perror_with_name (_("Could not open source file for writing")); |
| 575 | |
| 576 | source_remover.emplace (fnames.source_file ()); |
| 577 | |
| 578 | if (fputs (code.c_str (), src.get ()) == EOF) |
| 579 | perror_with_name (_("Could not write to source file")); |
| 580 | } |
| 581 | |
| 582 | if (compile_debug) |
| 583 | fprintf_unfiltered (gdb_stdlog, "source file produced: %s\n\n", |
| 584 | fnames.source_file ()); |
| 585 | |
| 586 | /* Call the compiler and start the compilation process. */ |
| 587 | compiler->fe->ops->set_source_file (compiler->fe, fnames.source_file ()); |
| 588 | |
| 589 | if (compiler->fe->ops->version >= GCC_FE_VERSION_1) |
| 590 | ok = compiler->fe->ops->compile (compiler->fe, fnames.object_file ()); |
| 591 | else |
| 592 | ok = compiler->fe->ops->compile_v0 (compiler->fe, fnames.object_file (), |
| 593 | compile_debug); |
| 594 | if (!ok) |
| 595 | error (_("Compilation failed.")); |
| 596 | |
| 597 | if (compile_debug) |
| 598 | fprintf_unfiltered (gdb_stdlog, "object file produced: %s\n\n", |
| 599 | fnames.object_file ()); |
| 600 | |
| 601 | /* Keep the source file. */ |
| 602 | source_remover->keep (); |
| 603 | |
| 604 | do_cleanups (cleanup); |
| 605 | |
| 606 | return fnames; |
| 607 | } |
| 608 | |
| 609 | /* The "compile" prefix command. */ |
| 610 | |
| 611 | static void |
| 612 | compile_command (const char *args, int from_tty) |
| 613 | { |
| 614 | /* If a sub-command is not specified to the compile prefix command, |
| 615 | assume it is a direct code compilation. */ |
| 616 | compile_code_command (args, from_tty); |
| 617 | } |
| 618 | |
| 619 | /* See compile.h. */ |
| 620 | |
| 621 | void |
| 622 | eval_compile_command (struct command_line *cmd, const char *cmd_string, |
| 623 | enum compile_i_scope_types scope, void *scope_data) |
| 624 | { |
| 625 | struct compile_module *compile_module; |
| 626 | |
| 627 | compile_file_names fnames = compile_to_object (cmd, cmd_string, scope); |
| 628 | |
| 629 | gdb::unlinker object_remover (fnames.object_file ()); |
| 630 | gdb::unlinker source_remover (fnames.source_file ()); |
| 631 | |
| 632 | compile_module = compile_object_load (fnames, scope, scope_data); |
| 633 | if (compile_module == NULL) |
| 634 | { |
| 635 | gdb_assert (scope == COMPILE_I_PRINT_ADDRESS_SCOPE); |
| 636 | eval_compile_command (cmd, cmd_string, |
| 637 | COMPILE_I_PRINT_VALUE_SCOPE, scope_data); |
| 638 | return; |
| 639 | } |
| 640 | |
| 641 | /* Keep the files. */ |
| 642 | source_remover.keep (); |
| 643 | object_remover.keep (); |
| 644 | |
| 645 | compile_object_run (compile_module); |
| 646 | } |
| 647 | |
| 648 | /* See compile/compile-internal.h. */ |
| 649 | |
| 650 | std::string |
| 651 | compile_register_name_mangled (struct gdbarch *gdbarch, int regnum) |
| 652 | { |
| 653 | const char *regname = gdbarch_register_name (gdbarch, regnum); |
| 654 | |
| 655 | return string_printf ("__%s", regname); |
| 656 | } |
| 657 | |
| 658 | /* See compile/compile-internal.h. */ |
| 659 | |
| 660 | int |
| 661 | compile_register_name_demangle (struct gdbarch *gdbarch, |
| 662 | const char *regname) |
| 663 | { |
| 664 | int regnum; |
| 665 | |
| 666 | if (regname[0] != '_' || regname[1] != '_') |
| 667 | error (_("Invalid register name \"%s\"."), regname); |
| 668 | regname += 2; |
| 669 | |
| 670 | for (regnum = 0; regnum < gdbarch_num_regs (gdbarch); regnum++) |
| 671 | if (strcmp (regname, gdbarch_register_name (gdbarch, regnum)) == 0) |
| 672 | return regnum; |
| 673 | |
| 674 | error (_("Cannot find gdbarch register \"%s\"."), regname); |
| 675 | } |
| 676 | |
| 677 | void |
| 678 | _initialize_compile (void) |
| 679 | { |
| 680 | struct cmd_list_element *c = NULL; |
| 681 | |
| 682 | add_prefix_cmd ("compile", class_obscure, compile_command, |
| 683 | _("\ |
| 684 | Command to compile source code and inject it into the inferior."), |
| 685 | &compile_command_list, "compile ", 1, &cmdlist); |
| 686 | add_com_alias ("expression", "compile", class_obscure, 0); |
| 687 | |
| 688 | add_cmd ("code", class_obscure, compile_code_command, |
| 689 | _("\ |
| 690 | Compile, inject, and execute code.\n\ |
| 691 | \n\ |
| 692 | Usage: compile code [-r|-raw] [--] [CODE]\n\ |
| 693 | -r|-raw: Suppress automatic 'void _gdb_expr () { CODE }' wrapping.\n\ |
| 694 | --: Do not parse any options beyond this delimiter. All text to the\n\ |
| 695 | right will be treated as source code.\n\ |
| 696 | \n\ |
| 697 | The source code may be specified as a simple one line expression, e.g.:\n\ |
| 698 | \n\ |
| 699 | compile code printf(\"Hello world\\n\");\n\ |
| 700 | \n\ |
| 701 | Alternatively, you can type a multiline expression by invoking\n\ |
| 702 | this command with no argument. GDB will then prompt for the\n\ |
| 703 | expression interactively; type a line containing \"end\" to\n\ |
| 704 | indicate the end of the expression."), |
| 705 | &compile_command_list); |
| 706 | |
| 707 | c = add_cmd ("file", class_obscure, compile_file_command, |
| 708 | _("\ |
| 709 | Evaluate a file containing source code.\n\ |
| 710 | \n\ |
| 711 | Usage: compile file [-r|-raw] [filename]\n\ |
| 712 | -r|-raw: Suppress automatic 'void _gdb_expr () { CODE }' wrapping."), |
| 713 | &compile_command_list); |
| 714 | set_cmd_completer (c, filename_completer); |
| 715 | |
| 716 | add_cmd ("print", class_obscure, compile_print_command, |
| 717 | _("\ |
| 718 | Evaluate EXPR by using the compiler and print result.\n\ |
| 719 | \n\ |
| 720 | Usage: compile print[/FMT] [EXPR]\n\ |
| 721 | \n\ |
| 722 | The expression may be specified on the same line as the command, e.g.:\n\ |
| 723 | \n\ |
| 724 | compile print i\n\ |
| 725 | \n\ |
| 726 | Alternatively, you can type a multiline expression by invoking\n\ |
| 727 | this command with no argument. GDB will then prompt for the\n\ |
| 728 | expression interactively; type a line containing \"end\" to\n\ |
| 729 | indicate the end of the expression.\n\ |
| 730 | \n\ |
| 731 | EXPR may be preceded with /FMT, where FMT is a format letter\n\ |
| 732 | but no count or size letter (see \"x\" command)."), |
| 733 | &compile_command_list); |
| 734 | |
| 735 | add_setshow_boolean_cmd ("compile", class_maintenance, &compile_debug, _("\ |
| 736 | Set compile command debugging."), _("\ |
| 737 | Show compile command debugging."), _("\ |
| 738 | When on, compile command debugging is enabled."), |
| 739 | NULL, show_compile_debug, |
| 740 | &setdebuglist, &showdebuglist); |
| 741 | |
| 742 | add_setshow_string_cmd ("compile-args", class_support, |
| 743 | &compile_args, |
| 744 | _("Set compile command GCC command-line arguments"), |
| 745 | _("Show compile command GCC command-line arguments"), |
| 746 | _("\ |
| 747 | Use options like -I (include file directory) or ABI settings.\n\ |
| 748 | String quoting is parsed like in shell, for example:\n\ |
| 749 | -mno-align-double \"-I/dir with a space/include\""), |
| 750 | set_compile_args, show_compile_args, &setlist, &showlist); |
| 751 | |
| 752 | /* Override flags possibly coming from DW_AT_producer. */ |
| 753 | compile_args = xstrdup ("-O0 -gdwarf-4" |
| 754 | /* We use -fPIE Otherwise GDB would need to reserve space large enough for |
| 755 | any object file in the inferior in advance to get the final address when |
| 756 | to link the object file to and additionally the default system linker |
| 757 | script would need to be modified so that one can specify there the |
| 758 | absolute target address. |
| 759 | -fPIC is not used at is would require from GDB to generate .got. */ |
| 760 | " -fPIE" |
| 761 | /* We want warnings, except for some commonly happening for GDB commands. */ |
| 762 | " -Wall " |
| 763 | " -Wno-implicit-function-declaration" |
| 764 | " -Wno-unused-but-set-variable" |
| 765 | " -Wno-unused-variable" |
| 766 | /* Override CU's possible -fstack-protector-strong. */ |
| 767 | " -fno-stack-protector" |
| 768 | ); |
| 769 | set_compile_args (compile_args, 0, NULL); |
| 770 | |
| 771 | add_setshow_optional_filename_cmd ("compile-gcc", class_support, |
| 772 | &compile_gcc, |
| 773 | _("Set compile command " |
| 774 | "GCC driver filename"), |
| 775 | _("Show compile command " |
| 776 | "GCC driver filename"), |
| 777 | _("\ |
| 778 | It should be absolute filename of the gcc executable.\n\ |
| 779 | If empty the default target triplet will be searched in $PATH."), |
| 780 | NULL, show_compile_gcc, &setlist, |
| 781 | &showlist); |
| 782 | compile_gcc = xstrdup (""); |
| 783 | } |