From 3c1645a379e405c7ce33060846fa424373b1f5f4 Mon Sep 17 00:00:00 2001 From: David Malcolm Date: Thu, 20 Feb 2020 08:44:23 -0500 Subject: [PATCH] analyzer: validate region subclasses This patch converts region::validate to a vfunc, implementing additional checking per subclass: verifying that various region_id fields within map_region, array_region, stack_region and root_region are valid, rather than just those within the base class. Doing so caught bugs earlier in follow-up work I have on canonicalization and purging of region_model. gcc/analyzer/ChangeLog: * region-model.cc (region::validate): Convert model param from ptr to reference. Update comment to reflect that it's now a vfunc. (map_region::validate): New vfunc implementation. (array_region::validate): New vfunc implementation. (stack_region::validate): New vfunc implementation. (root_region::validate): New vfunc implementation. (region_model::validate): Pass a reference rather than a pointer to the region::validate vfunc. * region-model.h (region::validate): Make virtual. Convert model param from ptr to reference. (map_region::validate): New vfunc decl. (array_region::validate): New vfunc decl. (stack_region::validate): New vfunc decl. (root_region::validate): New vfunc decl. --- gcc/analyzer/ChangeLog | 17 +++++++++ gcc/analyzer/region-model.cc | 70 ++++++++++++++++++++++++++++++++---- gcc/analyzer/region-model.h | 8 ++++- 3 files changed, 87 insertions(+), 8 deletions(-) diff --git a/gcc/analyzer/ChangeLog b/gcc/analyzer/ChangeLog index c4724cb090d..4a95fa60f9a 100644 --- a/gcc/analyzer/ChangeLog +++ b/gcc/analyzer/ChangeLog @@ -1,3 +1,20 @@ +2020-03-04 David Malcolm + + * region-model.cc (region::validate): Convert model param from ptr + to reference. Update comment to reflect that it's now a vfunc. + (map_region::validate): New vfunc implementation. + (array_region::validate): New vfunc implementation. + (stack_region::validate): New vfunc implementation. + (root_region::validate): New vfunc implementation. + (region_model::validate): Pass a reference rather than a pointer + to the region::validate vfunc. + * region-model.h (region::validate): Make virtual. Convert model + param from ptr to reference. + (map_region::validate): New vfunc decl. + (array_region::validate): New vfunc decl. + (stack_region::validate): New vfunc decl. + (root_region::validate): New vfunc decl. + 2020-03-04 David Malcolm PR analyzer/93993 diff --git a/gcc/analyzer/region-model.cc b/gcc/analyzer/region-model.cc index 6813117968f..0ceeab45a02 100644 --- a/gcc/analyzer/region-model.cc +++ b/gcc/analyzer/region-model.cc @@ -1360,21 +1360,23 @@ region::dump_child_label (const region_model &model, } } -/* Assert that this object is valid. */ +/* Base implementation of region::validate vfunc. + Assert that the fields of "region" are valid; subclasses should + chain up their implementation to this one. */ void -region::validate (const region_model *model) const +region::validate (const region_model &model) const { - m_parent_rid.validate (*model); - m_sval_id.validate (*model); + m_parent_rid.validate (model); + m_sval_id.validate (model); unsigned i; region_id *view_rid; FOR_EACH_VEC_ELT (m_view_rids, i, view_rid) { gcc_assert (!view_rid->null_p ()); - view_rid->validate (*model); + view_rid->validate (model); } - m_active_view_rid.validate (*model); + m_active_view_rid.validate (model); } /* Apply MAP to svalue_ids to this region. This updates the value @@ -1599,6 +1601,21 @@ map_region::print_fields (const region_model &model, pp_string (pp, "}"); } +/* Implementation of region::validate vfunc for map_region. */ + +void +map_region::validate (const region_model &model) const +{ + region::validate (model); + for (map_t::iterator iter = m_map.begin (); + iter != m_map.end (); + ++iter) + { + region_id child_rid = (*iter).second; + child_rid.validate (model); + } +} + /* Implementation of region::dump_dot_to_pp vfunc for map_region. */ void @@ -2268,6 +2285,21 @@ array_region::print_fields (const region_model &model, pp_string (pp, "}"); } +/* Implementation of region::validate vfunc for array_region. */ + +void +array_region::validate (const region_model &model) const +{ + region::validate (model); + for (map_t::iterator iter = m_map.begin (); + iter != m_map.end (); + ++iter) + { + region_id child_rid = (*iter).second; + child_rid.validate (model); + } +} + /* Implementation of region::dump_dot_to_pp vfunc for array_region. */ void @@ -2544,6 +2576,18 @@ stack_region::dump_child_label (const region_model &model, pp_printf (pp, "frame for %qs: ", function_name (fun)); } +/* Implementation of region::validate vfunc for stack_region. */ + +void +stack_region::validate (const region_model &model) const +{ + region::validate (model); + int i; + region_id *frame_rid; + FOR_EACH_VEC_ELT (m_frame_rids, i, frame_rid) + m_frame_rids[i].validate (model); +} + /* Push FRAME_RID (for a frame_region) onto this stack. */ void @@ -2834,6 +2878,18 @@ root_region::print_fields (const region_model &model, // TODO } +/* Implementation of region::validate vfunc for root_region. */ + +void +root_region::validate (const region_model &model) const +{ + region::validate (model); + m_stack_rid.validate (model); + m_globals_rid.validate (model); + m_code_rid.validate (model); + m_heap_rid.validate (model); +} + /* Implementation of region::dump_child_label vfunc for root_region. */ void @@ -3714,7 +3770,7 @@ region_model::validate () const unsigned i; region *r; FOR_EACH_VEC_ELT (m_regions, i, r) - r->validate (this); + r->validate (*this); // TODO: anything else? diff --git a/gcc/analyzer/region-model.h b/gcc/analyzer/region-model.h index 6d49f00cfe3..c782e93a83d 100644 --- a/gcc/analyzer/region-model.h +++ b/gcc/analyzer/region-model.h @@ -891,7 +891,7 @@ public: region_id get_view (tree type, region_model *model) const; bool is_view_p () const { return m_is_view; } - void validate (const region_model *model) const; + virtual void validate (const region_model &model) const; bool non_null_p (const region_model &model) const; @@ -1014,6 +1014,7 @@ public: region_id this_rid, pretty_printer *pp) const OVERRIDE; + void validate (const region_model &model) const FINAL OVERRIDE; private: /* Mapping from tree to child region. */ @@ -1396,6 +1397,7 @@ public: region_id this_rid, pretty_printer *pp) const OVERRIDE; + void validate (const region_model &model) const FINAL OVERRIDE; static key_t key_from_constant (tree cst); @@ -1462,6 +1464,8 @@ public: svalue_id get_value_by_name (tree identifier, const region_model &model) const; + void validate (const region_model &model) const FINAL OVERRIDE; + private: void add_to_hash (inchash::hash &hstate) const FINAL OVERRIDE; void print_fields (const region_model &model, @@ -1577,6 +1581,8 @@ public: svalue_id get_value_by_name (tree identifier, const region_model &model) const; + void validate (const region_model &model) const FINAL OVERRIDE; + private: void add_to_hash (inchash::hash &hstate) const FINAL OVERRIDE; void print_fields (const region_model &model,