1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943
|
/* Generic static probe support for GDB.
Copyright (C) 2012-2018 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "probe.h"
#include "command.h"
#include "cli/cli-cmds.h"
#include "cli/cli-utils.h"
#include "objfiles.h"
#include "symtab.h"
#include "progspace.h"
#include "filenames.h"
#include "linespec.h"
#include "gdb_regex.h"
#include "frame.h"
#include "arch-utils.h"
#include "value.h"
#include "ax.h"
#include "ax-gdb.h"
#include "location.h"
#include <ctype.h>
#include <algorithm>
#include "common/gdb_optional.h"
/* Class that implements the static probe methods for "any" probe. */
class any_static_probe_ops : public static_probe_ops
{
public:
/* See probe.h. */
bool is_linespec (const char **linespecp) const override;
/* See probe.h. */
void get_probes (std::vector<probe *> *probesp,
struct objfile *objfile) const override;
/* See probe.h. */
const char *type_name () const override;
/* See probe.h. */
std::vector<struct info_probe_column> gen_info_probes_table_header
() const override;
};
/* Static operations associated with a generic probe. */
const any_static_probe_ops any_static_probe_ops;
/* A helper for parse_probes that decodes a probe specification in
SEARCH_PSPACE. It appends matching SALs to RESULT. */
static void
parse_probes_in_pspace (const static_probe_ops *spops,
struct program_space *search_pspace,
const char *objfile_namestr,
const char *provider,
const char *name,
std::vector<symtab_and_line> *result)
{
struct objfile *objfile;
ALL_PSPACE_OBJFILES (search_pspace, objfile)
{
if (!objfile->sf || !objfile->sf->sym_probe_fns)
continue;
if (objfile_namestr
&& FILENAME_CMP (objfile_name (objfile), objfile_namestr) != 0
&& FILENAME_CMP (lbasename (objfile_name (objfile)),
objfile_namestr) != 0)
continue;
const std::vector<probe *> &probes
= objfile->sf->sym_probe_fns->sym_get_probes (objfile);
for (probe *p : probes)
{
if (spops != &any_static_probe_ops && p->get_static_ops () != spops)
continue;
if (provider != NULL && p->get_provider () != provider)
continue;
if (p->get_name () != name)
continue;
symtab_and_line sal;
sal.pc = p->get_relocated_address (objfile);
sal.explicit_pc = 1;
sal.section = find_pc_overlay (sal.pc);
sal.pspace = search_pspace;
sal.prob = p;
sal.objfile = objfile;
result->push_back (std::move (sal));
}
}
}
/* See definition in probe.h. */
std::vector<symtab_and_line>
parse_probes (const struct event_location *location,
struct program_space *search_pspace,
struct linespec_result *canonical)
{
char *arg_end, *arg;
char *objfile_namestr = NULL, *provider = NULL, *name, *p;
const char *arg_start, *cs;
gdb_assert (event_location_type (location) == PROBE_LOCATION);
arg_start = get_probe_location (location);
cs = arg_start;
const static_probe_ops *spops = probe_linespec_to_static_ops (&cs);
if (spops == NULL)
error (_("'%s' is not a probe linespec"), arg_start);
arg = (char *) cs;
arg = skip_spaces (arg);
if (!*arg)
error (_("argument to `%s' missing"), arg_start);
arg_end = skip_to_space (arg);
/* We make a copy here so we can write over parts with impunity. */
std::string copy (arg, arg_end - arg);
arg = ©[0];
/* Extract each word from the argument, separated by ":"s. */
p = strchr (arg, ':');
if (p == NULL)
{
/* This is `-p name'. */
name = arg;
}
else
{
char *hold = p + 1;
*p = '\0';
p = strchr (hold, ':');
if (p == NULL)
{
/* This is `-p provider:name'. */
provider = arg;
name = hold;
}
else
{
/* This is `-p objfile:provider:name'. */
*p = '\0';
objfile_namestr = arg;
provider = hold;
name = p + 1;
}
}
if (*name == '\0')
error (_("no probe name specified"));
if (provider && *provider == '\0')
error (_("invalid provider name"));
if (objfile_namestr && *objfile_namestr == '\0')
error (_("invalid objfile name"));
std::vector<symtab_and_line> result;
if (search_pspace != NULL)
{
parse_probes_in_pspace (spops, search_pspace, objfile_namestr,
provider, name, &result);
}
else
{
struct program_space *pspace;
ALL_PSPACES (pspace)
parse_probes_in_pspace (spops, pspace, objfile_namestr,
provider, name, &result);
}
if (result.empty ())
{
throw_error (NOT_FOUND_ERROR,
_("No probe matching objfile=`%s', provider=`%s', name=`%s'"),
objfile_namestr ? objfile_namestr : _("<any>"),
provider ? provider : _("<any>"),
name);
}
if (canonical)
{
std::string canon (arg_start, arg_end - arg_start);
canonical->special_display = 1;
canonical->pre_expanded = 1;
canonical->location = new_probe_location (canon.c_str ());
}
return result;
}
/* See definition in probe.h. */
std::vector<probe *>
find_probes_in_objfile (struct objfile *objfile, const char *provider,
const char *name)
{
std::vector<probe *> result;
if (!objfile->sf || !objfile->sf->sym_probe_fns)
return result;
const std::vector<probe *> &probes
= objfile->sf->sym_probe_fns->sym_get_probes (objfile);
for (probe *p : probes)
{
if (p->get_provider () != provider)
continue;
if (p->get_name () != name)
continue;
result.push_back (p);
}
return result;
}
/* See definition in probe.h. */
struct bound_probe
find_probe_by_pc (CORE_ADDR pc)
{
struct objfile *objfile;
struct bound_probe result;
result.objfile = NULL;
result.prob = NULL;
ALL_OBJFILES (objfile)
{
if (!objfile->sf || !objfile->sf->sym_probe_fns
|| objfile->sect_index_text == -1)
continue;
/* If this proves too inefficient, we can replace with a hash. */
const std::vector<probe *> &probes
= objfile->sf->sym_probe_fns->sym_get_probes (objfile);
for (probe *p : probes)
if (p->get_relocated_address (objfile) == pc)
{
result.objfile = objfile;
result.prob = p;
return result;
}
}
return result;
}
/* Make a vector of probes matching OBJNAME, PROVIDER, and PROBE_NAME.
If SPOPS is not &any_static_probe_ops, only probes related to this
specific static probe ops will match. Each argument is a regexp,
or NULL, which matches anything. */
static std::vector<bound_probe>
collect_probes (const std::string &objname, const std::string &provider,
const std::string &probe_name, const static_probe_ops *spops)
{
struct objfile *objfile;
std::vector<bound_probe> result;
gdb::optional<compiled_regex> obj_pat, prov_pat, probe_pat;
if (!provider.empty ())
prov_pat.emplace (provider.c_str (), REG_NOSUB,
_("Invalid provider regexp"));
if (!probe_name.empty ())
probe_pat.emplace (probe_name.c_str (), REG_NOSUB,
_("Invalid probe regexp"));
if (!objname.empty ())
obj_pat.emplace (objname.c_str (), REG_NOSUB,
_("Invalid object file regexp"));
ALL_OBJFILES (objfile)
{
if (! objfile->sf || ! objfile->sf->sym_probe_fns)
continue;
if (obj_pat)
{
if (obj_pat->exec (objfile_name (objfile), 0, NULL, 0) != 0)
continue;
}
const std::vector<probe *> &probes
= objfile->sf->sym_probe_fns->sym_get_probes (objfile);
for (probe *p : probes)
{
if (spops != &any_static_probe_ops && p->get_static_ops () != spops)
continue;
if (prov_pat
&& prov_pat->exec (p->get_provider ().c_str (), 0, NULL, 0) != 0)
continue;
if (probe_pat
&& probe_pat->exec (p->get_name ().c_str (), 0, NULL, 0) != 0)
continue;
result.emplace_back (p, objfile);
}
}
return result;
}
/* A qsort comparison function for bound_probe_s objects. */
static bool
compare_probes (const bound_probe &a, const bound_probe &b)
{
int v;
v = a.prob->get_provider ().compare (b.prob->get_provider ());
if (v != 0)
return v < 0;
v = a.prob->get_name ().compare (b.prob->get_name ());
if (v != 0)
return v < 0;
if (a.prob->get_address () != b.prob->get_address ())
return a.prob->get_address () < b.prob->get_address ();
return strcmp (objfile_name (a.objfile), objfile_name (b.objfile)) < 0;
}
/* Helper function that generate entries in the ui_out table being
crafted by `info_probes_for_ops'. */
static void
gen_ui_out_table_header_info (const std::vector<bound_probe> &probes,
const static_probe_ops *spops)
{
/* `headings' refers to the names of the columns when printing `info
probes'. */
gdb_assert (spops != NULL);
std::vector<struct info_probe_column> headings
= spops->gen_info_probes_table_header ();
for (const info_probe_column &column : headings)
{
size_t size_max = strlen (column.print_name);
for (const bound_probe &probe : probes)
{
/* `probe_fields' refers to the values of each new field that this
probe will display. */
if (probe.prob->get_static_ops () != spops)
continue;
std::vector<const char *> probe_fields
= probe.prob->gen_info_probes_table_values ();
gdb_assert (probe_fields.size () == headings.size ());
for (const char *val : probe_fields)
{
/* It is valid to have a NULL value here, which means that the
backend does not have something to write and this particular
field should be skipped. */
if (val == NULL)
continue;
size_max = std::max (strlen (val), size_max);
}
}
current_uiout->table_header (size_max, ui_left,
column.field_name, column.print_name);
}
}
/* Helper function to print not-applicable strings for all the extra
columns defined in a static_probe_ops. */
static void
print_ui_out_not_applicables (const static_probe_ops *spops)
{
std::vector<struct info_probe_column> headings
= spops->gen_info_probes_table_header ();
for (const info_probe_column &column : headings)
current_uiout->field_string (column.field_name, _("n/a"));
}
/* Helper function to print extra information about a probe and an objfile
represented by PROBE. */
static void
print_ui_out_info (probe *probe)
{
/* `values' refers to the actual values of each new field in the output
of `info probe'. `headings' refers to the names of each new field. */
gdb_assert (probe != NULL);
std::vector<struct info_probe_column> headings
= probe->get_static_ops ()->gen_info_probes_table_header ();
std::vector<const char *> values
= probe->gen_info_probes_table_values ();
gdb_assert (headings.size () == values.size ());
for (int ix = 0; ix < headings.size (); ++ix)
{
struct info_probe_column column = headings[ix];
const char *val = values[ix];
if (val == NULL)
current_uiout->field_skip (column.field_name);
else
current_uiout->field_string (column.field_name, val);
}
}
/* Helper function that returns the number of extra fields which POPS will
need. */
static int
get_number_extra_fields (const static_probe_ops *spops)
{
return spops->gen_info_probes_table_header ().size ();
}
/* Helper function that returns true if there is a probe in PROBES
featuring the given SPOPS. It returns false otherwise. */
static bool
exists_probe_with_spops (const std::vector<bound_probe> &probes,
const static_probe_ops *spops)
{
for (const bound_probe &probe : probes)
if (probe.prob->get_static_ops () == spops)
return true;
return false;
}
/* Helper function that parses a probe linespec of the form [PROVIDER
[PROBE [OBJNAME]]] from the provided string STR. */
static void
parse_probe_linespec (const char *str, std::string *provider,
std::string *probe_name, std::string *objname)
{
*probe_name = *objname = "";
*provider = extract_arg (&str);
if (!provider->empty ())
{
*probe_name = extract_arg (&str);
if (!probe_name->empty ())
*objname = extract_arg (&str);
}
}
/* See comment in probe.h. */
void
info_probes_for_spops (const char *arg, int from_tty,
const static_probe_ops *spops)
{
std::string provider, probe_name, objname;
int any_found;
int ui_out_extra_fields = 0;
size_t size_addr;
size_t size_name = strlen ("Name");
size_t size_objname = strlen ("Object");
size_t size_provider = strlen ("Provider");
size_t size_type = strlen ("Type");
struct gdbarch *gdbarch = get_current_arch ();
parse_probe_linespec (arg, &provider, &probe_name, &objname);
std::vector<bound_probe> probes
= collect_probes (objname, provider, probe_name, spops);
if (spops == &any_static_probe_ops)
{
/* If SPOPS is &any_static_probe_ops, it means the user has
requested a "simple" `info probes', i.e., she wants to print
all information about all probes. For that, we have to
identify how many extra fields we will need to add in the
ui_out table.
To do that, we iterate over all static_probe_ops, querying
each one about its extra fields, and incrementing
`ui_out_extra_fields' to reflect that number. But note that
we ignore the static_probe_ops for which no probes are
defined with the given search criteria. */
for (const static_probe_ops *po : all_static_probe_ops)
if (exists_probe_with_spops (probes, po))
ui_out_extra_fields += get_number_extra_fields (po);
}
else
ui_out_extra_fields = get_number_extra_fields (spops);
{
ui_out_emit_table table_emitter (current_uiout,
5 + ui_out_extra_fields,
probes.size (), "StaticProbes");
std::sort (probes.begin (), probes.end (), compare_probes);
/* What's the size of an address in our architecture? */
size_addr = gdbarch_addr_bit (gdbarch) == 64 ? 18 : 10;
/* Determining the maximum size of each field (`type', `provider',
`name' and `objname'). */
for (const bound_probe &probe : probes)
{
const char *probe_type = probe.prob->get_static_ops ()->type_name ();
size_type = std::max (strlen (probe_type), size_type);
size_name = std::max (probe.prob->get_name ().size (), size_name);
size_provider = std::max (probe.prob->get_provider ().size (),
size_provider);
size_objname = std::max (strlen (objfile_name (probe.objfile)),
size_objname);
}
current_uiout->table_header (size_type, ui_left, "type", _("Type"));
current_uiout->table_header (size_provider, ui_left, "provider",
_("Provider"));
current_uiout->table_header (size_name, ui_left, "name", _("Name"));
current_uiout->table_header (size_addr, ui_left, "addr", _("Where"));
if (spops == &any_static_probe_ops)
{
/* We have to generate the table header for each new probe type
that we will print. Note that this excludes probe types not
having any defined probe with the search criteria. */
for (const static_probe_ops *po : all_static_probe_ops)
if (exists_probe_with_spops (probes, po))
gen_ui_out_table_header_info (probes, po);
}
else
gen_ui_out_table_header_info (probes, spops);
current_uiout->table_header (size_objname, ui_left, "object", _("Object"));
current_uiout->table_body ();
for (const bound_probe &probe : probes)
{
const char *probe_type = probe.prob->get_static_ops ()->type_name ();
ui_out_emit_tuple tuple_emitter (current_uiout, "probe");
current_uiout->field_string ("type", probe_type);
current_uiout->field_string ("provider",
probe.prob->get_provider ().c_str ());
current_uiout->field_string ("name", probe.prob->get_name ().c_str ());
current_uiout->field_core_addr ("addr", probe.prob->get_gdbarch (),
probe.prob->get_relocated_address
(probe.objfile));
if (spops == &any_static_probe_ops)
{
for (const static_probe_ops *po : all_static_probe_ops)
{
if (probe.prob->get_static_ops () == po)
print_ui_out_info (probe.prob);
else if (exists_probe_with_spops (probes, po))
print_ui_out_not_applicables (po);
}
}
else
print_ui_out_info (probe.prob);
current_uiout->field_string ("object",
objfile_name (probe.objfile));
current_uiout->text ("\n");
}
any_found = !probes.empty ();
}
if (!any_found)
current_uiout->message (_("No probes matched.\n"));
}
/* Implementation of the `info probes' command. */
static void
info_probes_command (const char *arg, int from_tty)
{
info_probes_for_spops (arg, from_tty, &any_static_probe_ops);
}
/* Implementation of the `enable probes' command. */
static void
enable_probes_command (const char *arg, int from_tty)
{
std::string provider, probe_name, objname;
parse_probe_linespec ((const char *) arg, &provider, &probe_name, &objname);
std::vector<bound_probe> probes
= collect_probes (objname, provider, probe_name, &any_static_probe_ops);
if (probes.empty ())
{
current_uiout->message (_("No probes matched.\n"));
return;
}
/* Enable the selected probes, provided their backends support the
notion of enabling a probe. */
for (const bound_probe &probe: probes)
{
if (probe.prob->get_static_ops ()->can_enable ())
{
probe.prob->enable ();
current_uiout->message (_("Probe %s:%s enabled.\n"),
probe.prob->get_provider ().c_str (),
probe.prob->get_name ().c_str ());
}
else
current_uiout->message (_("Probe %s:%s cannot be enabled.\n"),
probe.prob->get_provider ().c_str (),
probe.prob->get_name ().c_str ());
}
}
/* Implementation of the `disable probes' command. */
static void
disable_probes_command (const char *arg, int from_tty)
{
std::string provider, probe_name, objname;
parse_probe_linespec ((const char *) arg, &provider, &probe_name, &objname);
std::vector<bound_probe> probes
= collect_probes (objname, provider, probe_name, &any_static_probe_ops);
if (probes.empty ())
{
current_uiout->message (_("No probes matched.\n"));
return;
}
/* Disable the selected probes, provided their backends support the
notion of enabling a probe. */
for (const bound_probe &probe : probes)
{
if (probe.prob->get_static_ops ()->can_enable ())
{
probe.prob->disable ();
current_uiout->message (_("Probe %s:%s disabled.\n"),
probe.prob->get_provider ().c_str (),
probe.prob->get_name ().c_str ());
}
else
current_uiout->message (_("Probe %s:%s cannot be disabled.\n"),
probe.prob->get_provider ().c_str (),
probe.prob->get_name ().c_str ());
}
}
/* See comments in probe.h. */
struct value *
probe_safe_evaluate_at_pc (struct frame_info *frame, unsigned n)
{
struct bound_probe probe;
unsigned n_args;
probe = find_probe_by_pc (get_frame_pc (frame));
if (!probe.prob)
return NULL;
n_args = probe.prob->get_argument_count (frame);
if (n >= n_args)
return NULL;
return probe.prob->evaluate_argument (n, frame);
}
/* See comment in probe.h. */
const struct static_probe_ops *
probe_linespec_to_static_ops (const char **linespecp)
{
for (const static_probe_ops *ops : all_static_probe_ops)
if (ops->is_linespec (linespecp))
return ops;
return NULL;
}
/* See comment in probe.h. */
int
probe_is_linespec_by_keyword (const char **linespecp, const char *const *keywords)
{
const char *s = *linespecp;
const char *const *csp;
for (csp = keywords; *csp; csp++)
{
const char *keyword = *csp;
size_t len = strlen (keyword);
if (strncmp (s, keyword, len) == 0 && isspace (s[len]))
{
*linespecp += len + 1;
return 1;
}
}
return 0;
}
/* Implementation of `is_linespec' method. */
bool
any_static_probe_ops::is_linespec (const char **linespecp) const
{
static const char *const keywords[] = { "-p", "-probe", NULL };
return probe_is_linespec_by_keyword (linespecp, keywords);
}
/* Implementation of 'get_probes' method. */
void
any_static_probe_ops::get_probes (std::vector<probe *> *probesp,
struct objfile *objfile) const
{
/* No probes can be provided by this dummy backend. */
}
/* Implementation of the 'type_name' method. */
const char *
any_static_probe_ops::type_name () const
{
return NULL;
}
/* Implementation of the 'gen_info_probes_table_header' method. */
std::vector<struct info_probe_column>
any_static_probe_ops::gen_info_probes_table_header () const
{
return std::vector<struct info_probe_column> ();
}
/* See comments in probe.h. */
struct cmd_list_element **
info_probes_cmdlist_get (void)
{
static struct cmd_list_element *info_probes_cmdlist;
if (info_probes_cmdlist == NULL)
add_prefix_cmd ("probes", class_info, info_probes_command,
_("\
Show available static probes.\n\
Usage: info probes [all|TYPE [ARGS]]\n\
TYPE specifies the type of the probe, and can be one of the following:\n\
- stap\n\
If you specify TYPE, there may be additional arguments needed by the\n\
subcommand.\n\
If you do not specify any argument, or specify `all', then the command\n\
will show information about all types of probes."),
&info_probes_cmdlist, "info probes ",
0/*allow-unknown*/, &infolist);
return &info_probes_cmdlist;
}
/* This is called to compute the value of one of the $_probe_arg*
convenience variables. */
static struct value *
compute_probe_arg (struct gdbarch *arch, struct internalvar *ivar,
void *data)
{
struct frame_info *frame = get_selected_frame (_("No frame selected"));
CORE_ADDR pc = get_frame_pc (frame);
int sel = (int) (uintptr_t) data;
struct bound_probe pc_probe;
unsigned n_args;
/* SEL == -1 means "_probe_argc". */
gdb_assert (sel >= -1);
pc_probe = find_probe_by_pc (pc);
if (pc_probe.prob == NULL)
error (_("No probe at PC %s"), core_addr_to_string (pc));
n_args = pc_probe.prob->get_argument_count (frame);
if (sel == -1)
return value_from_longest (builtin_type (arch)->builtin_int, n_args);
if (sel >= n_args)
error (_("Invalid probe argument %d -- probe has %u arguments available"),
sel, n_args);
return pc_probe.prob->evaluate_argument (sel, frame);
}
/* This is called to compile one of the $_probe_arg* convenience
variables into an agent expression. */
static void
compile_probe_arg (struct internalvar *ivar, struct agent_expr *expr,
struct axs_value *value, void *data)
{
CORE_ADDR pc = expr->scope;
int sel = (int) (uintptr_t) data;
struct bound_probe pc_probe;
int n_args;
struct frame_info *frame = get_selected_frame (NULL);
/* SEL == -1 means "_probe_argc". */
gdb_assert (sel >= -1);
pc_probe = find_probe_by_pc (pc);
if (pc_probe.prob == NULL)
error (_("No probe at PC %s"), core_addr_to_string (pc));
n_args = pc_probe.prob->get_argument_count (frame);
if (sel == -1)
{
value->kind = axs_rvalue;
value->type = builtin_type (expr->gdbarch)->builtin_int;
ax_const_l (expr, n_args);
return;
}
gdb_assert (sel >= 0);
if (sel >= n_args)
error (_("Invalid probe argument %d -- probe has %d arguments available"),
sel, n_args);
pc_probe.prob->compile_to_ax (expr, value, sel);
}
static const struct internalvar_funcs probe_funcs =
{
compute_probe_arg,
compile_probe_arg,
NULL
};
std::vector<const static_probe_ops *> all_static_probe_ops;
void
_initialize_probe (void)
{
all_static_probe_ops.push_back (&any_static_probe_ops);
create_internalvar_type_lazy ("_probe_argc", &probe_funcs,
(void *) (uintptr_t) -1);
create_internalvar_type_lazy ("_probe_arg0", &probe_funcs,
(void *) (uintptr_t) 0);
create_internalvar_type_lazy ("_probe_arg1", &probe_funcs,
(void *) (uintptr_t) 1);
create_internalvar_type_lazy ("_probe_arg2", &probe_funcs,
(void *) (uintptr_t) 2);
create_internalvar_type_lazy ("_probe_arg3", &probe_funcs,
(void *) (uintptr_t) 3);
create_internalvar_type_lazy ("_probe_arg4", &probe_funcs,
(void *) (uintptr_t) 4);
create_internalvar_type_lazy ("_probe_arg5", &probe_funcs,
(void *) (uintptr_t) 5);
create_internalvar_type_lazy ("_probe_arg6", &probe_funcs,
(void *) (uintptr_t) 6);
create_internalvar_type_lazy ("_probe_arg7", &probe_funcs,
(void *) (uintptr_t) 7);
create_internalvar_type_lazy ("_probe_arg8", &probe_funcs,
(void *) (uintptr_t) 8);
create_internalvar_type_lazy ("_probe_arg9", &probe_funcs,
(void *) (uintptr_t) 9);
create_internalvar_type_lazy ("_probe_arg10", &probe_funcs,
(void *) (uintptr_t) 10);
create_internalvar_type_lazy ("_probe_arg11", &probe_funcs,
(void *) (uintptr_t) 11);
add_cmd ("all", class_info, info_probes_command,
_("\
Show information about all type of probes."),
info_probes_cmdlist_get ());
add_cmd ("probes", class_breakpoint, enable_probes_command, _("\
Enable probes.\n\
Usage: enable probes [PROVIDER [NAME [OBJECT]]]\n\
Each argument is a regular expression, used to select probes.\n\
PROVIDER matches probe provider names.\n\
NAME matches the probe names.\n\
OBJECT matches the executable or shared library name.\n\
If you do not specify any argument then the command will enable\n\
all defined probes."),
&enablelist);
add_cmd ("probes", class_breakpoint, disable_probes_command, _("\
Disable probes.\n\
Usage: disable probes [PROVIDER [NAME [OBJECT]]]\n\
Each argument is a regular expression, used to select probes.\n\
PROVIDER matches probe provider names.\n\
NAME matches the probe names.\n\
OBJECT matches the executable or shared library name.\n\
If you do not specify any argument then the command will disable\n\
all defined probes."),
&disablelist);
}
|