1 /* Pointer Bounds Checker IPA passes.
2 Copyright (C) 2014-2015 Free Software Foundation, Inc.
3 Contributed by Ilya Enkovich (ilya.enkovich@intel.com)
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
23 #include "coretypes.h"
27 #include "double-int.h"
35 #include "fold-const.h"
36 #include "stor-layout.h"
37 #include "tree-pass.h"
38 #include "stringpool.h"
40 #include "gimple-expr.h"
42 #include "hard-reg-set.h"
45 #include "tree-ssa-alias.h"
47 #include "basic-block.h"
50 #include "lto-streamer.h"
52 #include "tree-chkp.h"
53 #include "tree-inline.h"
56 /* Pointer Bounds Checker has two IPA passes to support code instrumentation.
58 In instrumented code each pointer is provided with bounds. For input
59 pointer parameters it means we also have bounds passed. For calls it
60 means we have additional bounds arguments for pointer arguments.
62 To have all IPA optimizations working correctly we have to express
63 dataflow between passed and received bounds explicitly via additional
64 entries in function declaration arguments list and in function type.
65 Since we may have both instrumented and not instrumented code at the
66 same time, we cannot replace all original functions with their
67 instrumented variants. Therefore we create clones (versions) instead.
69 Instrumentation clones creation is a separate IPA pass which is a part
70 of early local passes. Clones are created after SSA is built (because
71 instrumentation pass works on SSA) and before any transformations
72 which may change pointer flow and therefore lead to incorrect code
73 instrumentation (possibly causing false bounds check failures).
75 Instrumentation clones have pointer bounds arguments added right after
76 pointer arguments. Clones have assembler name of the original
77 function with suffix added. New assembler name is in transparent
78 alias chain with the original name. Thus we expect all calls to the
79 original and instrumented functions look similar in assembler.
81 During instrumentation versioning pass we create instrumented versions
82 of all function with body and also for all their aliases and thunks.
83 Clones for functions with no body are created on demand (usually
84 during call instrumentation).
86 Original and instrumented function nodes are connected with IPA
87 reference IPA_REF_CHKP. It is mostly done to have reachability
88 analysis working correctly. We may have no references to the
89 instrumented function in the code but it still should be counted
90 as reachable if the original function is reachable.
92 When original function bodies are not needed anymore we release
93 them and transform functions into a special kind of thunks. Each
94 thunk has a call edge to the instrumented version. These thunks
95 help to keep externally visible instrumented functions visible
96 when linker resolution files are used. Linker has no info about
97 connection between original and instrumented function and
98 therefore we may wrongly decide (due to difference in assembler
99 names) that instrumented function version is local and can be
102 #define CHKP_BOUNDS_OF_SYMBOL_PREFIX "__chkp_bounds_of_"
103 #define CHKP_WRAPPER_SYMBOL_PREFIX "__mpx_wrapper_"
105 /* Return 1 calls to FNDECL should be replaced with
106 a call to wrapper function. */
108 chkp_wrap_function (tree fndecl)
110 if (!flag_chkp_use_wrappers)
113 if (DECL_BUILT_IN_CLASS (fndecl) == BUILT_IN_NORMAL)
115 switch (DECL_FUNCTION_CODE (fndecl))
117 case BUILT_IN_STRLEN:
118 case BUILT_IN_STRCPY:
119 case BUILT_IN_STRNCPY:
120 case BUILT_IN_STPCPY:
121 case BUILT_IN_STPNCPY:
122 case BUILT_IN_STRCAT:
123 case BUILT_IN_STRNCAT:
124 case BUILT_IN_MEMCPY:
125 case BUILT_IN_MEMPCPY:
126 case BUILT_IN_MEMSET:
127 case BUILT_IN_MEMMOVE:
129 case BUILT_IN_MALLOC:
130 case BUILT_IN_CALLOC:
131 case BUILT_IN_REALLOC:
142 /* Build a clone of FNDECL with a modified name. */
145 chkp_build_instrumented_fndecl (tree fndecl)
147 tree new_decl = copy_node (fndecl);
151 /* called_as_built_in checks DECL_NAME to identify calls to
152 builtins. We want instrumented calls to builtins to be
153 recognized by called_as_built_in. Therefore use original
154 DECL_NAME for cloning with no prefixes. */
155 s = IDENTIFIER_POINTER (DECL_NAME (fndecl));
157 DECL_NAME (new_decl) = get_identifier (s.c_str ());
159 /* References to the original and to the instrumented version
160 should look the same in the output assembly. And we cannot
161 use the same assembler name for the instrumented version
162 because it conflicts with decl merging algorithms in LTO.
163 Achieve the result by using transparent alias name for the
164 instrumented version. */
165 if (chkp_wrap_function(fndecl))
167 s = CHKP_WRAPPER_SYMBOL_PREFIX;
168 s += IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (fndecl));
169 new_name = get_identifier (s.c_str ());
173 s = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (fndecl));
175 new_name = get_identifier (s.c_str ());
176 IDENTIFIER_TRANSPARENT_ALIAS (new_name) = 1;
177 TREE_CHAIN (new_name) = DECL_ASSEMBLER_NAME (fndecl);
179 SET_DECL_ASSEMBLER_NAME (new_decl, new_name);
181 /* For functions with body versioning will make a copy of arguments.
182 For functions with no body we need to do it here. */
183 if (!gimple_has_body_p (fndecl))
184 DECL_ARGUMENTS (new_decl) = copy_list (DECL_ARGUMENTS (fndecl));
186 /* We are going to modify attributes list and therefore should
188 DECL_ATTRIBUTES (new_decl) = copy_list (DECL_ATTRIBUTES (fndecl));
190 /* Change builtin function code. */
191 if (DECL_BUILT_IN (new_decl))
193 gcc_assert (DECL_BUILT_IN_CLASS (new_decl) == BUILT_IN_NORMAL);
194 gcc_assert (DECL_FUNCTION_CODE (new_decl) < BEGIN_CHKP_BUILTINS);
195 DECL_FUNCTION_CODE (new_decl)
196 = (enum built_in_function)(DECL_FUNCTION_CODE (new_decl)
197 + BEGIN_CHKP_BUILTINS + 1);
204 /* Fix operands of attribute from ATTRS list named ATTR_NAME.
205 Integer operands are replaced with values according to
206 INDEXES map having LEN elements. For operands out of len
207 we just add DELTA. */
210 chkp_map_attr_arg_indexes (tree attrs, const char *attr_name,
211 unsigned *indexes, int len, int delta)
213 tree attr = lookup_attribute (attr_name, attrs);
219 TREE_VALUE (attr) = copy_list (TREE_VALUE (attr));
220 for (op = TREE_VALUE (attr); op; op = TREE_CHAIN (op))
224 if (TREE_CODE (TREE_VALUE (op)) != INTEGER_CST)
227 idx = TREE_INT_CST_LOW (TREE_VALUE (op));
229 /* If idx exceeds indexes length then we just
230 keep it at the same distance from the last
235 idx = indexes[idx - 1] + 1;
236 TREE_VALUE (op) = build_int_cst (TREE_TYPE (TREE_VALUE (op)), idx);
240 /* Make a copy of function type ORIG_TYPE adding pointer
241 bounds as additional arguments. */
244 chkp_copy_function_type_adding_bounds (tree orig_type)
247 tree arg_type, attrs, t;
248 unsigned len = list_length (TYPE_ARG_TYPES (orig_type));
249 unsigned *indexes = XALLOCAVEC (unsigned, len);
250 unsigned idx = 0, new_idx = 0;
252 for (arg_type = TYPE_ARG_TYPES (orig_type);
254 arg_type = TREE_CHAIN (arg_type))
255 if (TREE_VALUE (arg_type) == void_type_node)
257 else if (BOUNDED_TYPE_P (TREE_VALUE (arg_type))
258 || pass_by_reference (NULL, TYPE_MODE (TREE_VALUE (arg_type)),
259 TREE_VALUE (arg_type), true)
260 || chkp_type_has_pointer (TREE_VALUE (arg_type)))
263 /* We may use original type if there are no bounds passed. */
267 type = copy_node (orig_type);
268 TYPE_ARG_TYPES (type) = copy_list (TYPE_ARG_TYPES (type));
270 for (arg_type = TYPE_ARG_TYPES (type);
272 arg_type = TREE_CHAIN (arg_type))
274 indexes[idx++] = new_idx++;
276 /* pass_by_reference returns 1 for void type,
277 so check for it first. */
278 if (TREE_VALUE (arg_type) == void_type_node)
280 else if (BOUNDED_TYPE_P (TREE_VALUE (arg_type))
281 || pass_by_reference (NULL, TYPE_MODE (TREE_VALUE (arg_type)),
282 TREE_VALUE (arg_type), true))
284 tree new_type = build_tree_list (NULL_TREE,
285 pointer_bounds_type_node);
286 TREE_CHAIN (new_type) = TREE_CHAIN (arg_type);
287 TREE_CHAIN (arg_type) = new_type;
289 arg_type = TREE_CHAIN (arg_type);
292 else if (chkp_type_has_pointer (TREE_VALUE (arg_type)))
294 bitmap slots = BITMAP_ALLOC (NULL);
298 chkp_find_bound_slots (TREE_VALUE (arg_type), slots);
300 EXECUTE_IF_SET_IN_BITMAP (slots, 0, bnd_no, bi)
302 tree new_type = build_tree_list (NULL_TREE,
303 pointer_bounds_type_node);
304 TREE_CHAIN (new_type) = TREE_CHAIN (arg_type);
305 TREE_CHAIN (arg_type) = new_type;
307 arg_type = TREE_CHAIN (arg_type);
314 /* If function type has attribute with arg indexes then
315 we have to copy it fixing attribute ops. Map for
316 fixing is in indexes array. */
317 attrs = TYPE_ATTRIBUTES (type);
318 if (lookup_attribute ("nonnull", attrs)
319 || lookup_attribute ("format", attrs)
320 || lookup_attribute ("format_arg", attrs))
322 int delta = new_idx - len;
323 attrs = copy_list (TYPE_ATTRIBUTES (type));
324 chkp_map_attr_arg_indexes (attrs, "nonnull", indexes, len, delta);
325 chkp_map_attr_arg_indexes (attrs, "format", indexes, len, delta);
326 chkp_map_attr_arg_indexes (attrs, "format_arg", indexes, len, delta);
327 TYPE_ATTRIBUTES (type) = attrs;
330 t = TYPE_MAIN_VARIANT (orig_type);
333 TYPE_MAIN_VARIANT (type) = t;
334 TYPE_NEXT_VARIANT (type) = TYPE_NEXT_VARIANT (t);
335 TYPE_NEXT_VARIANT (t) = type;
339 TYPE_MAIN_VARIANT (type) = type;
340 TYPE_NEXT_VARIANT (type) = NULL;
347 /* For given function FNDECL add bounds arguments to arguments
351 chkp_add_bounds_params_to_function (tree fndecl)
355 for (arg = DECL_ARGUMENTS (fndecl); arg; arg = DECL_CHAIN (arg))
358 std::string new_name = CHKP_BOUNDS_OF_SYMBOL_PREFIX;
362 new_name += IDENTIFIER_POINTER (DECL_NAME (arg));
366 snprintf (uid, 25, "D.%u", DECL_UID (arg));
370 new_arg = build_decl (DECL_SOURCE_LOCATION (arg), PARM_DECL,
371 get_identifier (new_name.c_str ()),
372 pointer_bounds_type_node);
373 DECL_ARG_TYPE (new_arg) = pointer_bounds_type_node;
374 DECL_CONTEXT (new_arg) = DECL_CONTEXT (arg);
375 DECL_ARTIFICIAL (new_arg) = 1;
376 DECL_CHAIN (new_arg) = DECL_CHAIN (arg);
377 DECL_CHAIN (arg) = new_arg;
379 arg = DECL_CHAIN (arg);
382 else if (chkp_type_has_pointer (TREE_TYPE (arg)))
385 bitmap slots = BITMAP_ALLOC (NULL);
389 chkp_find_bound_slots (TREE_TYPE (arg), slots);
391 EXECUTE_IF_SET_IN_BITMAP (slots, 0, bnd_no, bi)
393 std::string new_name = CHKP_BOUNDS_OF_SYMBOL_PREFIX;
397 if (DECL_NAME (orig_arg))
398 new_name += IDENTIFIER_POINTER (DECL_NAME (orig_arg));
401 snprintf (offs, 25, "D.%u", DECL_UID (arg));
404 snprintf (offs, 25, "__%u", bnd_no * POINTER_SIZE / BITS_PER_UNIT);
406 new_arg = build_decl (DECL_SOURCE_LOCATION (orig_arg),
408 get_identifier (new_name.c_str ()),
409 pointer_bounds_type_node);
410 DECL_ARG_TYPE (new_arg) = pointer_bounds_type_node;
411 DECL_CONTEXT (new_arg) = DECL_CONTEXT (orig_arg);
412 DECL_ARTIFICIAL (new_arg) = 1;
413 DECL_CHAIN (new_arg) = DECL_CHAIN (arg);
414 DECL_CHAIN (arg) = new_arg;
416 arg = DECL_CHAIN (arg);
422 chkp_copy_function_type_adding_bounds (TREE_TYPE (fndecl));
425 /* Return an instrumentation clone for builtin function
426 FNDECL. Create one if needed. */
429 chkp_maybe_clone_builtin_fndecl (tree fndecl)
432 enum built_in_function fcode = DECL_FUNCTION_CODE (fndecl);
434 gcc_assert (DECL_BUILT_IN_CLASS (fndecl) == BUILT_IN_NORMAL
435 && fcode < BEGIN_CHKP_BUILTINS);
437 fcode = (enum built_in_function) (fcode + BEGIN_CHKP_BUILTINS + 1);
438 clone = builtin_decl_explicit (fcode);
442 clone = chkp_build_instrumented_fndecl (fndecl);
443 chkp_add_bounds_params_to_function (clone);
445 gcc_assert (DECL_FUNCTION_CODE (clone) == fcode);
447 set_builtin_decl (fcode, clone, false);
452 /* Return 1 if function FNDECL should be instrumented. */
455 chkp_instrumentable_p (tree fndecl)
457 struct function *fn = DECL_STRUCT_FUNCTION (fndecl);
458 return (!lookup_attribute ("bnd_legacy", DECL_ATTRIBUTES (fndecl))
459 && (!flag_chkp_instrument_marked_only
460 || lookup_attribute ("bnd_instrument", DECL_ATTRIBUTES (fndecl)))
461 && (!fn || !copy_forbidden (fn, fndecl)));
464 /* Return clone created for instrumentation of NODE or NULL. */
467 chkp_maybe_create_clone (tree fndecl)
469 cgraph_node *node = cgraph_node::get_create (fndecl);
470 cgraph_node *clone = node->instrumented_version;
472 gcc_assert (!node->instrumentation_clone);
474 if (DECL_BUILT_IN (fndecl)
475 && (DECL_BUILT_IN_CLASS (fndecl) != BUILT_IN_NORMAL
476 || DECL_FUNCTION_CODE (fndecl) >= BEGIN_CHKP_BUILTINS))
479 clone = node->instrumented_version;
481 /* Some instrumented builtin function calls may be optimized and
482 cgraph nodes may be removed as unreachable. Later optimizations
483 may generate new calls to removed functions and in this case
484 we have to recreate cgraph node. FUNCTION_DECL for instrumented
485 builtin still exists and should be reused in such case. */
486 if (DECL_BUILT_IN_CLASS (fndecl) == BUILT_IN_NORMAL
487 && fndecl == builtin_decl_explicit (DECL_FUNCTION_CODE (fndecl))
490 enum built_in_function fncode = DECL_FUNCTION_CODE (fndecl);
493 fncode = (enum built_in_function) (fncode + BEGIN_CHKP_BUILTINS + 1);
494 new_decl = builtin_decl_explicit (fncode);
496 /* We've actually already created an instrumented clone once.
500 clone = cgraph_node::get (new_decl);
504 gcc_assert (!gimple_has_body_p (fndecl));
505 clone = cgraph_node::get_create (new_decl);
506 clone->externally_visible = node->externally_visible;
507 clone->local = node->local;
508 clone->address_taken = node->address_taken;
509 clone->thunk = node->thunk;
510 clone->alias = node->alias;
511 clone->weakref = node->weakref;
512 clone->cpp_implicit_alias = node->cpp_implicit_alias;
513 clone->orig_decl = fndecl;
514 clone->instrumentation_clone = true;
517 clone->instrumented_version = node;
518 node->instrumented_version = clone;
524 tree new_decl = chkp_build_instrumented_fndecl (fndecl);
525 struct cgraph_edge *e;
529 clone = node->create_version_clone (new_decl, vNULL, NULL);
530 clone->externally_visible = node->externally_visible;
531 clone->local = node->local;
532 clone->address_taken = node->address_taken;
533 clone->thunk = node->thunk;
534 clone->alias = node->alias;
535 clone->weakref = node->weakref;
536 clone->cpp_implicit_alias = node->cpp_implicit_alias;
537 clone->instrumented_version = node;
538 clone->orig_decl = fndecl;
539 clone->instrumentation_clone = true;
540 node->instrumented_version = clone;
542 if (gimple_has_body_p (fndecl))
544 /* If function will not be instrumented, then it's instrumented
545 version is a thunk for the original. */
546 if (!chkp_instrumentable_p (fndecl))
548 clone->remove_callees ();
549 clone->remove_all_references ();
550 clone->thunk.thunk_p = true;
551 clone->thunk.add_pointer_bounds_args = true;
552 clone->create_edge (node, NULL, 0, CGRAPH_FREQ_BASE);
556 tree_function_versioning (fndecl, new_decl, NULL, false,
557 NULL, false, NULL, NULL);
558 clone->lowered = true;
562 /* New params are inserted after versioning because it
563 actually copies args list from the original decl. */
564 chkp_add_bounds_params_to_function (new_decl);
566 /* Remember builtin fndecl. */
567 if (DECL_BUILT_IN_CLASS (clone->decl) == BUILT_IN_NORMAL
568 && fndecl == builtin_decl_explicit (DECL_FUNCTION_CODE (fndecl)))
570 gcc_assert (!builtin_decl_explicit (DECL_FUNCTION_CODE (clone->decl)));
571 set_builtin_decl (DECL_FUNCTION_CODE (clone->decl),
575 /* Clones have the same comdat group as originals. */
576 if (node->same_comdat_group
577 || DECL_ONE_ONLY (node->decl))
578 clone->add_to_same_comdat_group (node);
580 if (gimple_has_body_p (fndecl))
581 symtab->call_cgraph_insertion_hooks (clone);
583 /* Clone all aliases. */
584 for (i = 0; node->iterate_direct_aliases (i, ref); i++)
586 struct cgraph_node *alias = dyn_cast <cgraph_node *> (ref->referring);
587 struct cgraph_node *chkp_alias
588 = chkp_maybe_create_clone (alias->decl);
589 chkp_alias->create_reference (clone, IPA_REF_ALIAS, NULL);
592 /* Clone all thunks. */
593 for (e = node->callers; e; e = e->next_caller)
594 if (e->caller->thunk.thunk_p
595 && !e->caller->thunk.add_pointer_bounds_args)
597 struct cgraph_node *thunk
598 = chkp_maybe_create_clone (e->caller->decl);
599 /* Redirect thunk clone edge to the node clone. */
600 thunk->callees->redirect_callee (clone);
603 /* For aliases and thunks we should make sure target is cloned
604 to have proper references and edges. */
605 if (node->thunk.thunk_p)
606 chkp_maybe_create_clone (node->callees->callee->decl);
607 else if (node->alias)
609 struct cgraph_node *target;
611 ref = node->ref_list.first_reference ();
613 chkp_maybe_create_clone (ref->referred->decl);
615 if (node->alias_target)
617 if (TREE_CODE (node->alias_target) == FUNCTION_DECL)
619 target = chkp_maybe_create_clone (node->alias_target);
620 clone->alias_target = target->decl;
623 clone->alias_target = node->alias_target;
627 /* Add IPA reference. It's main role is to keep instrumented
628 version reachable while original node is reachable. */
629 ref = node->create_reference (clone, IPA_REF_CHKP, NULL);
635 /* Create clone for all functions to be instrumented. */
638 chkp_versioning (void)
640 struct cgraph_node *node;
643 bitmap_obstack_initialize (NULL);
645 FOR_EACH_DEFINED_FUNCTION (node)
647 if (!node->instrumentation_clone
648 && !node->instrumented_version
650 && !node->thunk.thunk_p
651 && (!DECL_BUILT_IN (node->decl)
652 || (DECL_BUILT_IN_CLASS (node->decl) == BUILT_IN_NORMAL
653 && DECL_FUNCTION_CODE (node->decl) < BEGIN_CHKP_BUILTINS)))
655 if (chkp_instrumentable_p (node->decl))
656 chkp_maybe_create_clone (node->decl);
657 else if ((reason = copy_forbidden (DECL_STRUCT_FUNCTION (node->decl),
660 if (warning_at (DECL_SOURCE_LOCATION (node->decl), OPT_Wchkp,
661 "function cannot be instrumented"))
662 inform (DECL_SOURCE_LOCATION (node->decl), reason, node->decl);
667 /* Mark all aliases and thunks of functions with no instrumented
668 version as legacy function. */
669 FOR_EACH_DEFINED_FUNCTION (node)
671 if (!node->instrumentation_clone
672 && !node->instrumented_version
673 && (node->alias || node->thunk.thunk_p)
674 && !lookup_attribute ("bnd_legacy", DECL_ATTRIBUTES (node->decl)))
675 DECL_ATTRIBUTES (node->decl)
676 = tree_cons (get_identifier ("bnd_legacy"), NULL,
677 DECL_ATTRIBUTES (node->decl));
680 bitmap_obstack_release (NULL);
685 /* In this pass we remove bodies of functions having
686 instrumented version. Functions with removed bodies
687 become a special kind of thunks to provide a connection
688 between calls to the original version and instrumented
692 chkp_produce_thunks (bool early)
694 struct cgraph_node *node;
696 FOR_EACH_DEFINED_FUNCTION (node)
698 if (!node->instrumentation_clone
699 && node->instrumented_version
700 && gimple_has_body_p (node->decl)
701 && gimple_has_body_p (node->instrumented_version->decl)
702 && (!lookup_attribute ("always_inline", DECL_ATTRIBUTES (node->decl))
705 node->release_body ();
706 node->remove_callees ();
707 node->remove_all_references ();
709 node->thunk.thunk_p = true;
710 node->thunk.add_pointer_bounds_args = true;
711 node->create_edge (node->instrumented_version, NULL,
712 0, CGRAPH_FREQ_BASE);
713 node->create_reference (node->instrumented_version,
718 /* Mark instrumentation clones created for aliases and thunks
719 as insttrumented so they could be removed as unreachable
723 FOR_EACH_DEFINED_FUNCTION (node)
725 if (node->instrumentation_clone
726 && (node->alias || node->thunk.thunk_p)
727 && !chkp_function_instrumented_p (node->decl))
728 chkp_function_mark_instrumented (node->decl);
732 return TODO_remove_functions;
735 const pass_data pass_data_ipa_chkp_versioning =
737 SIMPLE_IPA_PASS, /* type */
738 "chkp_versioning", /* name */
739 OPTGROUP_NONE, /* optinfo_flags */
741 0, /* properties_required */
742 0, /* properties_provided */
743 0, /* properties_destroyed */
744 0, /* todo_flags_start */
745 0 /* todo_flags_finish */
748 const pass_data pass_data_ipa_chkp_early_produce_thunks =
750 SIMPLE_IPA_PASS, /* type */
751 "chkp_ecleanup", /* name */
752 OPTGROUP_NONE, /* optinfo_flags */
754 0, /* properties_required */
755 0, /* properties_provided */
756 0, /* properties_destroyed */
757 0, /* todo_flags_start */
758 0 /* todo_flags_finish */
761 const pass_data pass_data_ipa_chkp_produce_thunks =
763 SIMPLE_IPA_PASS, /* type */
764 "chkp_cleanup", /* name */
765 OPTGROUP_NONE, /* optinfo_flags */
767 0, /* properties_required */
768 0, /* properties_provided */
769 0, /* properties_destroyed */
770 0, /* todo_flags_start */
771 0 /* todo_flags_finish */
774 class pass_ipa_chkp_versioning : public simple_ipa_opt_pass
777 pass_ipa_chkp_versioning (gcc::context *ctxt)
778 : simple_ipa_opt_pass (pass_data_ipa_chkp_versioning, ctxt)
781 /* opt_pass methods: */
782 virtual opt_pass * clone ()
784 return new pass_ipa_chkp_versioning (m_ctxt);
787 virtual bool gate (function *)
789 return flag_check_pointer_bounds;
792 virtual unsigned int execute (function *)
794 return chkp_versioning ();
797 }; // class pass_ipa_chkp_versioning
799 class pass_ipa_chkp_early_produce_thunks : public simple_ipa_opt_pass
802 pass_ipa_chkp_early_produce_thunks (gcc::context *ctxt)
803 : simple_ipa_opt_pass (pass_data_ipa_chkp_early_produce_thunks, ctxt)
806 /* opt_pass methods: */
807 virtual opt_pass * clone ()
809 return new pass_ipa_chkp_early_produce_thunks (m_ctxt);
812 virtual bool gate (function *)
814 return flag_check_pointer_bounds;
817 virtual unsigned int execute (function *)
819 return chkp_produce_thunks (true);
822 }; // class pass_chkp_produce_thunks
824 class pass_ipa_chkp_produce_thunks : public simple_ipa_opt_pass
827 pass_ipa_chkp_produce_thunks (gcc::context *ctxt)
828 : simple_ipa_opt_pass (pass_data_ipa_chkp_produce_thunks, ctxt)
831 /* opt_pass methods: */
832 virtual opt_pass * clone ()
834 return new pass_ipa_chkp_produce_thunks (m_ctxt);
837 virtual bool gate (function *)
839 return flag_check_pointer_bounds;
842 virtual unsigned int execute (function *)
844 return chkp_produce_thunks (false);
847 }; // class pass_chkp_produce_thunks
849 simple_ipa_opt_pass *
850 make_pass_ipa_chkp_versioning (gcc::context *ctxt)
852 return new pass_ipa_chkp_versioning (ctxt);
855 simple_ipa_opt_pass *
856 make_pass_ipa_chkp_early_produce_thunks (gcc::context *ctxt)
858 return new pass_ipa_chkp_early_produce_thunks (ctxt);
861 simple_ipa_opt_pass *
862 make_pass_ipa_chkp_produce_thunks (gcc::context *ctxt)
864 return new pass_ipa_chkp_produce_thunks (ctxt);