/* Pointer Bounds Checker IPA passes. Copyright (C) 2014-2017 Free Software Foundation, Inc. Contributed by Ilya Enkovich (ilya.enkovich@intel.com) This file is part of GCC. GCC 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, or (at your option) any later version. GCC 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 GCC; see the file COPYING3. If not see . */ #include "config.h" #define INCLUDE_STRING #include "system.h" #include "coretypes.h" #include "backend.h" #include "tree.h" #include "gimple.h" #include "tree-pass.h" #include "stringpool.h" #include "lto-streamer.h" #include "stor-layout.h" #include "calls.h" #include "cgraph.h" #include "tree-chkp.h" #include "tree-inline.h" #include "ipa-chkp.h" /* Pointer Bounds Checker has two IPA passes to support code instrumentation. In instrumented code each pointer is provided with bounds. For input pointer parameters it means we also have bounds passed. For calls it means we have additional bounds arguments for pointer arguments. To have all IPA optimizations working correctly we have to express dataflow between passed and received bounds explicitly via additional entries in function declaration arguments list and in function type. Since we may have both instrumented and not instrumented code at the same time, we cannot replace all original functions with their instrumented variants. Therefore we create clones (versions) instead. Instrumentation clones creation is a separate IPA pass which is a part of early local passes. Clones are created after SSA is built (because instrumentation pass works on SSA) and before any transformations which may change pointer flow and therefore lead to incorrect code instrumentation (possibly causing false bounds check failures). Instrumentation clones have pointer bounds arguments added right after pointer arguments. Clones have assembler name of the original function with suffix added. New assembler name is in transparent alias chain with the original name. Thus we expect all calls to the original and instrumented functions look similar in assembler. During instrumentation versioning pass we create instrumented versions of all function with body and also for all their aliases and thunks. Clones for functions with no body are created on demand (usually during call instrumentation). Original and instrumented function nodes are connected with IPA reference IPA_REF_CHKP. It is mostly done to have reachability analysis working correctly. We may have no references to the instrumented function in the code but it still should be counted as reachable if the original function is reachable. When original function bodies are not needed anymore we release them and transform functions into a special kind of thunks. Each thunk has a call edge to the instrumented version. These thunks help to keep externally visible instrumented functions visible when linker resolution files are used. Linker has no info about connection between original and instrumented function and therefore we may wrongly decide (due to difference in assembler names) that instrumented function version is local and can be removed. */ #define CHKP_BOUNDS_OF_SYMBOL_PREFIX "__chkp_bounds_of_" #define CHKP_WRAPPER_SYMBOL_PREFIX "__mpx_wrapper_" /* Return 1 calls to FNDECL should be replaced with a call to wrapper function. */ bool chkp_wrap_function (tree fndecl) { if (!flag_chkp_use_wrappers) return false; if (DECL_BUILT_IN_CLASS (fndecl) == BUILT_IN_NORMAL) { switch (DECL_FUNCTION_CODE (fndecl)) { case BUILT_IN_STRLEN: case BUILT_IN_STRCPY: case BUILT_IN_STRNCPY: case BUILT_IN_STPCPY: case BUILT_IN_STPNCPY: case BUILT_IN_STRCAT: case BUILT_IN_STRNCAT: case BUILT_IN_MEMCPY: case BUILT_IN_MEMPCPY: case BUILT_IN_MEMSET: case BUILT_IN_MEMMOVE: case BUILT_IN_BZERO: case BUILT_IN_MALLOC: case BUILT_IN_CALLOC: case BUILT_IN_REALLOC: return 1; default: return 0; } } return false; } static const char * chkp_wrap_function_name (tree fndecl) { gcc_assert (DECL_BUILT_IN_CLASS (fndecl) == BUILT_IN_NORMAL); switch (DECL_FUNCTION_CODE (fndecl)) { case BUILT_IN_STRLEN: return CHKP_WRAPPER_SYMBOL_PREFIX "strlen"; case BUILT_IN_STRCPY: return CHKP_WRAPPER_SYMBOL_PREFIX "strcpy"; case BUILT_IN_STRNCPY: return CHKP_WRAPPER_SYMBOL_PREFIX "strncpy"; case BUILT_IN_STPCPY: return CHKP_WRAPPER_SYMBOL_PREFIX "stpcpy"; case BUILT_IN_STPNCPY: return CHKP_WRAPPER_SYMBOL_PREFIX "stpncpy"; case BUILT_IN_STRCAT: return CHKP_WRAPPER_SYMBOL_PREFIX "strcat"; case BUILT_IN_STRNCAT: return CHKP_WRAPPER_SYMBOL_PREFIX "strncat"; case BUILT_IN_MEMCPY: return CHKP_WRAPPER_SYMBOL_PREFIX "memcpy"; case BUILT_IN_MEMPCPY: return CHKP_WRAPPER_SYMBOL_PREFIX "mempcpy"; case BUILT_IN_MEMSET: return CHKP_WRAPPER_SYMBOL_PREFIX "memset"; case BUILT_IN_MEMMOVE: return CHKP_WRAPPER_SYMBOL_PREFIX "memmove"; case BUILT_IN_BZERO: return CHKP_WRAPPER_SYMBOL_PREFIX "bzero"; case BUILT_IN_MALLOC: return CHKP_WRAPPER_SYMBOL_PREFIX "malloc"; case BUILT_IN_CALLOC: return CHKP_WRAPPER_SYMBOL_PREFIX "calloc"; case BUILT_IN_REALLOC: return CHKP_WRAPPER_SYMBOL_PREFIX "realloc"; default: gcc_unreachable (); } return ""; } /* Build a clone of FNDECL with a modified name. */ static tree chkp_build_instrumented_fndecl (tree fndecl) { tree new_decl = copy_node (fndecl); tree new_name; std::string s; /* called_as_built_in checks DECL_NAME to identify calls to builtins. We want instrumented calls to builtins to be recognized by called_as_built_in. Therefore use original DECL_NAME for cloning with no prefixes. */ s = IDENTIFIER_POINTER (DECL_NAME (fndecl)); s += ".chkp"; DECL_NAME (new_decl) = get_identifier (s.c_str ()); /* References to the original and to the instrumented version should look the same in the output assembly. And we cannot use the same assembler name for the instrumented version because it conflicts with decl merging algorithms in LTO. Achieve the result by using transparent alias name for the instrumented version. */ if (chkp_wrap_function(fndecl)) { new_name = get_identifier (chkp_wrap_function_name (fndecl)); DECL_VISIBILITY (new_decl) = VISIBILITY_DEFAULT; } else { s = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (fndecl)); s += ".chkp"; new_name = get_identifier (s.c_str ()); IDENTIFIER_TRANSPARENT_ALIAS (new_name) = 1; TREE_CHAIN (new_name) = DECL_ASSEMBLER_NAME (fndecl); } SET_DECL_ASSEMBLER_NAME (new_decl, new_name); /* For functions with body versioning will make a copy of arguments. For functions with no body we need to do it here. */ if (!gimple_has_body_p (fndecl)) { tree arg; DECL_ARGUMENTS (new_decl) = copy_list (DECL_ARGUMENTS (fndecl)); for (arg = DECL_ARGUMENTS (new_decl); arg; arg = DECL_CHAIN (arg)) DECL_CONTEXT (arg) = new_decl; } /* We are going to modify attributes list and therefore should make own copy. */ DECL_ATTRIBUTES (new_decl) = copy_list (DECL_ATTRIBUTES (fndecl)); /* Change builtin function code. */ if (DECL_BUILT_IN (new_decl)) { gcc_assert (DECL_BUILT_IN_CLASS (new_decl) == BUILT_IN_NORMAL); gcc_assert (DECL_FUNCTION_CODE (new_decl) < BEGIN_CHKP_BUILTINS); DECL_FUNCTION_CODE (new_decl) = (enum built_in_function)(DECL_FUNCTION_CODE (new_decl) + BEGIN_CHKP_BUILTINS + 1); } return new_decl; } /* Fix operands of attribute from ATTRS list named ATTR_NAME. Integer operands are replaced with values according to INDEXES map having LEN elements. For operands out of len we just add DELTA. */ static void chkp_map_attr_arg_indexes (tree attrs, const char *attr_name, unsigned *indexes, int len, int delta) { tree attr = lookup_attribute (attr_name, attrs); tree op; if (!attr) return; TREE_VALUE (attr) = copy_list (TREE_VALUE (attr)); for (op = TREE_VALUE (attr); op; op = TREE_CHAIN (op)) { int idx; if (TREE_CODE (TREE_VALUE (op)) != INTEGER_CST) continue; idx = TREE_INT_CST_LOW (TREE_VALUE (op)); /* If idx exceeds indexes length then we just keep it at the same distance from the last known arg. */ if (idx > len) idx += delta; else idx = indexes[idx - 1] + 1; TREE_VALUE (op) = build_int_cst (TREE_TYPE (TREE_VALUE (op)), idx); } } /* Make a copy of function type ORIG_TYPE adding pointer bounds as additional arguments. */ tree chkp_copy_function_type_adding_bounds (tree orig_type) { tree type; tree arg_type, attrs; unsigned len = list_length (TYPE_ARG_TYPES (orig_type)); unsigned *indexes = XALLOCAVEC (unsigned, len); unsigned idx = 0, new_idx = 0; for (arg_type = TYPE_ARG_TYPES (orig_type); arg_type; arg_type = TREE_CHAIN (arg_type)) if (TREE_VALUE (arg_type) == void_type_node) continue; else if (BOUNDED_TYPE_P (TREE_VALUE (arg_type)) || pass_by_reference (NULL, TYPE_MODE (TREE_VALUE (arg_type)), TREE_VALUE (arg_type), true) || chkp_type_has_pointer (TREE_VALUE (arg_type))) break; /* We may use original type if there are no bounds passed. */ if (!arg_type) return orig_type; type = build_distinct_type_copy (orig_type); TYPE_ARG_TYPES (type) = copy_list (TYPE_ARG_TYPES (type)); for (arg_type = TYPE_ARG_TYPES (type); arg_type; arg_type = TREE_CHAIN (arg_type)) { indexes[idx++] = new_idx++; /* pass_by_reference returns 1 for void type, so check for it first. */ if (TREE_VALUE (arg_type) == void_type_node) continue; else if (BOUNDED_TYPE_P (TREE_VALUE (arg_type)) || pass_by_reference (NULL, TYPE_MODE (TREE_VALUE (arg_type)), TREE_VALUE (arg_type), true)) { tree new_type = build_tree_list (NULL_TREE, pointer_bounds_type_node); TREE_CHAIN (new_type) = TREE_CHAIN (arg_type); TREE_CHAIN (arg_type) = new_type; arg_type = TREE_CHAIN (arg_type); new_idx++; } else if (chkp_type_has_pointer (TREE_VALUE (arg_type))) { bitmap slots = BITMAP_ALLOC (NULL); bitmap_iterator bi; unsigned bnd_no; chkp_find_bound_slots (TREE_VALUE (arg_type), slots); EXECUTE_IF_SET_IN_BITMAP (slots, 0, bnd_no, bi) { tree new_type = build_tree_list (NULL_TREE, pointer_bounds_type_node); TREE_CHAIN (new_type) = TREE_CHAIN (arg_type); TREE_CHAIN (arg_type) = new_type; arg_type = TREE_CHAIN (arg_type); new_idx++; } BITMAP_FREE (slots); } } /* If function type has attribute with arg indexes then we have to copy it fixing attribute ops. Map for fixing is in indexes array. */ attrs = TYPE_ATTRIBUTES (type); if (lookup_attribute ("nonnull", attrs) || lookup_attribute ("format", attrs) || lookup_attribute ("format_arg", attrs)) { int delta = new_idx - len; attrs = copy_list (TYPE_ATTRIBUTES (type)); chkp_map_attr_arg_indexes (attrs, "nonnull", indexes, len, delta); chkp_map_attr_arg_indexes (attrs, "format", indexes, len, delta); chkp_map_attr_arg_indexes (attrs, "format_arg", indexes, len, delta); TYPE_ATTRIBUTES (type) = attrs; } return type; } /* For given function FNDECL add bounds arguments to arguments list. */ static void chkp_add_bounds_params_to_function (tree fndecl) { tree arg; for (arg = DECL_ARGUMENTS (fndecl); arg; arg = DECL_CHAIN (arg)) if (BOUNDED_P (arg)) { std::string new_name = CHKP_BOUNDS_OF_SYMBOL_PREFIX; tree new_arg; if (DECL_NAME (arg)) new_name += IDENTIFIER_POINTER (DECL_NAME (arg)); else { char uid[25]; snprintf (uid, 25, "D.%u", DECL_UID (arg)); new_name += uid; } new_arg = build_decl (DECL_SOURCE_LOCATION (arg), PARM_DECL, get_identifier (new_name.c_str ()), pointer_bounds_type_node); DECL_ARG_TYPE (new_arg) = pointer_bounds_type_node; DECL_CONTEXT (new_arg) = DECL_CONTEXT (arg); DECL_ARTIFICIAL (new_arg) = 1; DECL_CHAIN (new_arg) = DECL_CHAIN (arg); DECL_CHAIN (arg) = new_arg; arg = DECL_CHAIN (arg); } else if (chkp_type_has_pointer (TREE_TYPE (arg))) { tree orig_arg = arg; bitmap slots = BITMAP_ALLOC (NULL); bitmap_iterator bi; unsigned bnd_no; chkp_find_bound_slots (TREE_TYPE (arg), slots); EXECUTE_IF_SET_IN_BITMAP (slots, 0, bnd_no, bi) { std::string new_name = CHKP_BOUNDS_OF_SYMBOL_PREFIX; tree new_arg; char offs[25]; if (DECL_NAME (orig_arg)) new_name += IDENTIFIER_POINTER (DECL_NAME (orig_arg)); else { snprintf (offs, 25, "D.%u", DECL_UID (arg)); new_name += offs; } snprintf (offs, 25, "__%u", bnd_no * POINTER_SIZE / BITS_PER_UNIT); new_arg = build_decl (DECL_SOURCE_LOCATION (orig_arg), PARM_DECL, get_identifier (new_name.c_str ()), pointer_bounds_type_node); DECL_ARG_TYPE (new_arg) = pointer_bounds_type_node; DECL_CONTEXT (new_arg) = DECL_CONTEXT (orig_arg); DECL_ARTIFICIAL (new_arg) = 1; DECL_CHAIN (new_arg) = DECL_CHAIN (arg); DECL_CHAIN (arg) = new_arg; arg = DECL_CHAIN (arg); } BITMAP_FREE (slots); } TREE_TYPE (fndecl) = chkp_copy_function_type_adding_bounds (TREE_TYPE (fndecl)); } /* Return an instrumentation clone for builtin function FNDECL. Create one if needed. */ tree chkp_maybe_clone_builtin_fndecl (tree fndecl) { tree clone; enum built_in_function fcode = DECL_FUNCTION_CODE (fndecl); gcc_assert (DECL_BUILT_IN_CLASS (fndecl) == BUILT_IN_NORMAL && fcode < BEGIN_CHKP_BUILTINS); fcode = (enum built_in_function) (fcode + BEGIN_CHKP_BUILTINS + 1); clone = builtin_decl_explicit (fcode); if (clone) return clone; clone = chkp_build_instrumented_fndecl (fndecl); chkp_add_bounds_params_to_function (clone); gcc_assert (DECL_FUNCTION_CODE (clone) == fcode); set_builtin_decl (fcode, clone, false); return clone; } /* Return 1 if function FNDECL should be instrumented. */ bool chkp_instrumentable_p (tree fndecl) { struct function *fn = DECL_STRUCT_FUNCTION (fndecl); return (!lookup_attribute ("bnd_legacy", DECL_ATTRIBUTES (fndecl)) && (!flag_chkp_instrument_marked_only || lookup_attribute ("bnd_instrument", DECL_ATTRIBUTES (fndecl))) && (!fn || !copy_forbidden (fn))); } /* Return clone created for instrumentation of NODE or NULL. */ cgraph_node * chkp_maybe_create_clone (tree fndecl) { cgraph_node *node = cgraph_node::get_create (fndecl); cgraph_node *clone = node->instrumented_version; gcc_assert (!node->instrumentation_clone); if (DECL_BUILT_IN (fndecl) && (DECL_BUILT_IN_CLASS (fndecl) != BUILT_IN_NORMAL || DECL_FUNCTION_CODE (fndecl) >= BEGIN_CHKP_BUILTINS)) return NULL; clone = node->instrumented_version; /* Some instrumented builtin function calls may be optimized and cgraph nodes may be removed as unreachable. Later optimizations may generate new calls to removed functions and in this case we have to recreate cgraph node. FUNCTION_DECL for instrumented builtin still exists and should be reused in such case. */ if (DECL_BUILT_IN_CLASS (fndecl) == BUILT_IN_NORMAL && fndecl == builtin_decl_explicit (DECL_FUNCTION_CODE (fndecl)) && !clone) { enum built_in_function fncode = DECL_FUNCTION_CODE (fndecl); tree new_decl; fncode = (enum built_in_function) (fncode + BEGIN_CHKP_BUILTINS + 1); new_decl = builtin_decl_explicit (fncode); /* We've actually already created an instrumented clone once. Restore it. */ if (new_decl) { clone = cgraph_node::get (new_decl); if (!clone) { gcc_assert (!gimple_has_body_p (fndecl)); clone = cgraph_node::get_create (new_decl); clone->externally_visible = node->externally_visible; clone->local = node->local; clone->address_taken = node->address_taken; clone->thunk = node->thunk; clone->alias = node->alias; clone->weakref = node->weakref; clone->cpp_implicit_alias = node->cpp_implicit_alias; clone->orig_decl = fndecl; clone->instrumentation_clone = true; } clone->instrumented_version = node; node->instrumented_version = clone; } } if (!clone) { tree new_decl = chkp_build_instrumented_fndecl (fndecl); struct cgraph_edge *e; struct ipa_ref *ref; int i; clone = node->create_version_clone (new_decl, vNULL, NULL); clone->externally_visible = node->externally_visible; clone->local = node->local; clone->address_taken = node->address_taken; clone->thunk = node->thunk; clone->alias = node->alias; clone->weakref = node->weakref; clone->cpp_implicit_alias = node->cpp_implicit_alias; clone->instrumented_version = node; clone->orig_decl = fndecl; clone->instrumentation_clone = true; node->instrumented_version = clone; if (gimple_has_body_p (fndecl)) { gcc_assert (chkp_instrumentable_p (fndecl)); tree_function_versioning (fndecl, new_decl, NULL, false, NULL, false, NULL, NULL); clone->lowered = true; } /* New params are inserted after versioning because it actually copies args list from the original decl. */ chkp_add_bounds_params_to_function (new_decl); /* Remember builtin fndecl. */ if (DECL_BUILT_IN_CLASS (clone->decl) == BUILT_IN_NORMAL && fndecl == builtin_decl_explicit (DECL_FUNCTION_CODE (fndecl))) { gcc_assert (!builtin_decl_explicit (DECL_FUNCTION_CODE (clone->decl))); set_builtin_decl (DECL_FUNCTION_CODE (clone->decl), clone->decl, false); } /* Clones have the same comdat group as originals. */ if (node->same_comdat_group || (DECL_ONE_ONLY (node->decl) && !DECL_EXTERNAL (node->decl))) clone->add_to_same_comdat_group (node); if (gimple_has_body_p (fndecl)) symtab->call_cgraph_insertion_hooks (clone); /* Clone all aliases. */ for (i = 0; node->iterate_direct_aliases (i, ref); i++) chkp_maybe_create_clone (ref->referring->decl); /* Clone all thunks. */ for (e = node->callers; e; e = e->next_caller) if (e->caller->thunk.thunk_p && !e->caller->thunk.add_pointer_bounds_args && !e->caller->instrumentation_clone) { struct cgraph_node *thunk = chkp_maybe_create_clone (e->caller->decl); /* Redirect thunk clone edge to the node clone. */ thunk->callees->redirect_callee (clone); } /* For aliases and thunks we should make sure target is cloned to have proper references and edges. */ if (node->thunk.thunk_p) chkp_maybe_create_clone (node->callees->callee->decl); else if (node->alias) { struct cgraph_node *target; ref = node->ref_list.first_reference (); if (ref) { target = chkp_maybe_create_clone (ref->referred->decl); clone->create_reference (target, IPA_REF_ALIAS); } if (node->alias_target) { if (TREE_CODE (node->alias_target) == FUNCTION_DECL) { target = chkp_maybe_create_clone (node->alias_target); clone->alias_target = target->decl; } else clone->alias_target = node->alias_target; } } /* Add IPA reference. It's main role is to keep instrumented version reachable while original node is reachable. */ ref = node->create_reference (clone, IPA_REF_CHKP, NULL); } return clone; } /* Create clone for all functions to be instrumented. */ static unsigned int chkp_versioning (void) { struct cgraph_node *node; const char *reason; bitmap_obstack_initialize (NULL); FOR_EACH_DEFINED_FUNCTION (node) { tree decl = node->decl; if (!node->instrumentation_clone && !node->instrumented_version && !node->alias && !node->thunk.thunk_p && (!DECL_BUILT_IN (decl) || (DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL && DECL_FUNCTION_CODE (decl) < BEGIN_CHKP_BUILTINS))) { if (chkp_instrumentable_p (decl)) chkp_maybe_create_clone (decl); else if ((reason = copy_forbidden (DECL_STRUCT_FUNCTION (decl)))) { if (warning_at (DECL_SOURCE_LOCATION (decl), OPT_Wchkp, "function cannot be instrumented")) inform (DECL_SOURCE_LOCATION (decl), reason, decl); } } } /* Mark all aliases and thunks of functions with no instrumented version as legacy function. */ FOR_EACH_DEFINED_FUNCTION (node) { if (!node->instrumentation_clone && !node->instrumented_version && (node->alias || node->thunk.thunk_p) && !lookup_attribute ("bnd_legacy", DECL_ATTRIBUTES (node->decl))) DECL_ATTRIBUTES (node->decl) = tree_cons (get_identifier ("bnd_legacy"), NULL, DECL_ATTRIBUTES (node->decl)); } bitmap_obstack_release (NULL); return 0; } /* In this pass we remove bodies of functions having instrumented version. Functions with removed bodies become a special kind of thunks to provide a connection between calls to the original version and instrumented function. */ static unsigned int chkp_produce_thunks (bool early) { struct cgraph_node *node; FOR_EACH_DEFINED_FUNCTION (node) { if (!node->instrumentation_clone && node->instrumented_version && gimple_has_body_p (node->decl) && gimple_has_body_p (node->instrumented_version->decl) && (!lookup_attribute ("always_inline", DECL_ATTRIBUTES (node->decl)) || !early)) { node->release_body (); node->remove_callees (); node->remove_all_references (); node->thunk.thunk_p = true; node->thunk.add_pointer_bounds_args = true; node->create_edge (node->instrumented_version, NULL, 0, CGRAPH_FREQ_BASE); node->create_reference (node->instrumented_version, IPA_REF_CHKP, NULL); /* Thunk shouldn't be a cdtor. */ DECL_STATIC_CONSTRUCTOR (node->decl) = 0; DECL_STATIC_DESTRUCTOR (node->decl) = 0; } } /* Mark instrumentation clones created for aliases and thunks as insttrumented so they could be removed as unreachable now. */ if (!early) { FOR_EACH_DEFINED_FUNCTION (node) { if (node->instrumentation_clone && (node->alias || node->thunk.thunk_p) && !chkp_function_instrumented_p (node->decl)) chkp_function_mark_instrumented (node->decl); } } return TODO_remove_functions; } const pass_data pass_data_ipa_chkp_versioning = { SIMPLE_IPA_PASS, /* type */ "chkp_versioning", /* name */ OPTGROUP_NONE, /* optinfo_flags */ TV_NONE, /* tv_id */ 0, /* properties_required */ 0, /* properties_provided */ 0, /* properties_destroyed */ 0, /* todo_flags_start */ 0 /* todo_flags_finish */ }; const pass_data pass_data_ipa_chkp_early_produce_thunks = { SIMPLE_IPA_PASS, /* type */ "chkp_ecleanup", /* name */ OPTGROUP_NONE, /* optinfo_flags */ TV_NONE, /* tv_id */ 0, /* properties_required */ 0, /* properties_provided */ 0, /* properties_destroyed */ 0, /* todo_flags_start */ 0 /* todo_flags_finish */ }; const pass_data pass_data_ipa_chkp_produce_thunks = { SIMPLE_IPA_PASS, /* type */ "chkp_cleanup", /* name */ OPTGROUP_NONE, /* optinfo_flags */ TV_NONE, /* tv_id */ 0, /* properties_required */ 0, /* properties_provided */ 0, /* properties_destroyed */ 0, /* todo_flags_start */ 0 /* todo_flags_finish */ }; class pass_ipa_chkp_versioning : public simple_ipa_opt_pass { public: pass_ipa_chkp_versioning (gcc::context *ctxt) : simple_ipa_opt_pass (pass_data_ipa_chkp_versioning, ctxt) {} /* opt_pass methods: */ virtual opt_pass * clone () { return new pass_ipa_chkp_versioning (m_ctxt); } virtual bool gate (function *) { return flag_check_pointer_bounds; } virtual unsigned int execute (function *) { return chkp_versioning (); } }; // class pass_ipa_chkp_versioning class pass_ipa_chkp_early_produce_thunks : public simple_ipa_opt_pass { public: pass_ipa_chkp_early_produce_thunks (gcc::context *ctxt) : simple_ipa_opt_pass (pass_data_ipa_chkp_early_produce_thunks, ctxt) {} /* opt_pass methods: */ virtual opt_pass * clone () { return new pass_ipa_chkp_early_produce_thunks (m_ctxt); } virtual bool gate (function *) { return flag_check_pointer_bounds; } virtual unsigned int execute (function *) { return chkp_produce_thunks (true); } }; // class pass_chkp_produce_thunks class pass_ipa_chkp_produce_thunks : public simple_ipa_opt_pass { public: pass_ipa_chkp_produce_thunks (gcc::context *ctxt) : simple_ipa_opt_pass (pass_data_ipa_chkp_produce_thunks, ctxt) {} /* opt_pass methods: */ virtual opt_pass * clone () { return new pass_ipa_chkp_produce_thunks (m_ctxt); } virtual bool gate (function *) { return flag_check_pointer_bounds; } virtual unsigned int execute (function *) { return chkp_produce_thunks (false); } }; // class pass_chkp_produce_thunks simple_ipa_opt_pass * make_pass_ipa_chkp_versioning (gcc::context *ctxt) { return new pass_ipa_chkp_versioning (ctxt); } simple_ipa_opt_pass * make_pass_ipa_chkp_early_produce_thunks (gcc::context *ctxt) { return new pass_ipa_chkp_early_produce_thunks (ctxt); } simple_ipa_opt_pass * make_pass_ipa_chkp_produce_thunks (gcc::context *ctxt) { return new pass_ipa_chkp_produce_thunks (ctxt); }