analyzer: introduce struct event_loc_info
[platform/upstream/gcc.git] / gcc / analyzer / call-info.cc
1 /* Subclasses of custom_edge_info for describing outcomes of function calls.
2    Copyright (C) 2021-2022 Free Software Foundation, Inc.
3    Contributed by David Malcolm <dmalcolm@redhat.com>.
4
5 This file is part of GCC.
6
7 GCC is free software; you can redistribute it and/or modify it
8 under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3, or (at your option)
10 any later version.
11
12 GCC is distributed in the hope that it will be useful, but
13 WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15 General Public License for more details.
16
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/>.  */
20
21 #include "config.h"
22 #define INCLUDE_MEMORY
23 #include "system.h"
24 #include "coretypes.h"
25 #include "tree.h"
26 #include "function.h"
27 #include "basic-block.h"
28 #include "gimple.h"
29 #include "gimple-iterator.h"
30 #include "diagnostic-core.h"
31 #include "options.h"
32 #include "cgraph.h"
33 #include "tree-pretty-print.h"
34 #include "bitmap.h"
35 #include "analyzer/analyzer.h"
36 #include "analyzer/analyzer-logging.h"
37 #include "ordered-hash-map.h"
38 #include "cfg.h"
39 #include "digraph.h"
40 #include "analyzer/supergraph.h"
41 #include "sbitmap.h"
42 #include "analyzer/call-string.h"
43 #include "analyzer/program-point.h"
44 #include "analyzer/store.h"
45 #include "analyzer/region-model.h"
46 #include "analyzer/constraint-manager.h"
47 #include "diagnostic-event-id.h"
48 #include "analyzer/sm.h"
49 #include "analyzer/pending-diagnostic.h"
50 #include "analyzer/region-model-reachability.h"
51 #include "analyzer/analyzer-selftests.h"
52 #include "analyzer/program-state.h"
53 #include "diagnostic-path.h"
54 #include "analyzer/checker-path.h"
55 #include "analyzer/diagnostic-manager.h"
56 #include "analyzer/exploded-graph.h"
57 #include "analyzer/call-info.h"
58 #include "make-unique.h"
59
60 #if ENABLE_ANALYZER
61
62 namespace ana {
63
64 /* class custom_edge_info.  */
65
66 bool
67 custom_edge_info::update_state (program_state *state,
68                                 const exploded_edge *eedge,
69                                 region_model_context *ctxt) const
70 {
71   return update_model (state->m_region_model, eedge, ctxt);
72 }
73
74 /* class call_info : public custom_edge_info.  */
75
76 /* Implementation of custom_edge_info::print vfunc for call_info:
77    use get_desc to get a label_text, and print it to PP.  */
78
79 void
80 call_info::print (pretty_printer *pp) const
81 {
82   label_text desc (get_desc (pp_show_color (pp)));
83   pp_string (pp, desc.get ());
84 }
85
86 /* Implementation of custom_edge_info::add_events_to_path vfunc for
87    call_info: add a custom_event using call_info::get_desc as its
88    description.  */
89
90 void
91 call_info::add_events_to_path (checker_path *emission_path,
92                                const exploded_edge &eedge) const
93 {
94   class call_event : public custom_event
95   {
96   public:
97     call_event (const event_loc_info &loc_info,
98                 const call_info *call_info)
99     : custom_event (loc_info),
100       m_call_info (call_info)
101     {}
102
103     label_text get_desc (bool can_colorize) const final override
104     {
105       return m_call_info->get_desc (can_colorize);
106     }
107
108   private:
109     const call_info *m_call_info;
110   };
111
112   const exploded_node *src_node = eedge.m_src;
113   const program_point &src_point = src_node->get_point ();
114   tree caller_fndecl = src_point.get_fndecl ();
115   const int stack_depth = src_point.get_stack_depth ();
116
117   emission_path->add_event
118     (make_unique<call_event> (event_loc_info (get_call_stmt ()->location,
119                                               caller_fndecl,
120                                               stack_depth),
121                               this));
122 }
123
124 /* Recreate a call_details instance from this call_info.  */
125
126 call_details
127 call_info::get_call_details (region_model *model,
128                              region_model_context *ctxt) const
129 {
130   return call_details (m_call_stmt, model, ctxt);
131 }
132
133 /* call_info's ctor.
134
135    The call_info instance will outlive the call_details instance;
136    call_details instances are typically created on the stack.  */
137
138 call_info::call_info (const call_details &cd)
139 : m_call_stmt (cd.get_call_stmt ()),
140   m_fndecl (cd.get_fndecl_for_call ())
141 {
142   gcc_assert (m_fndecl);
143 }
144
145 /* class succeed_or_fail_call_info : public call_info.  */
146
147 label_text
148 succeed_or_fail_call_info::get_desc (bool can_colorize) const
149 {
150   if (m_success)
151     return make_label_text (can_colorize, "when %qE succeeds", get_fndecl ());
152   else
153     return make_label_text (can_colorize, "when %qE fails", get_fndecl ());
154 }
155
156 } // namespace ana
157
158 #endif /* #if ENABLE_ANALYZER */