1 /* Modeling API uses and misuses via state machines.
2 Copyright (C) 2019-2020 Free Software Foundation, Inc.
3 Contributed by David Malcolm <dmalcolm@redhat.com>.
5 This file is part of GCC.
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)
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.
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"
26 #include "basic-block.h"
30 #include "diagnostic-core.h"
31 #include "pretty-print.h"
32 #include "analyzer/analyzer.h"
33 #include "analyzer/analyzer-logging.h"
34 #include "analyzer/sm.h"
40 /* Return true if VAR has pointer or reference type. */
43 any_pointer_p (tree var
)
45 return POINTER_TYPE_P (TREE_TYPE (var
));
49 /* class state_machine::state. */
51 /* Base implementation of dump_to_pp vfunc. */
54 state_machine::state::dump_to_pp (pretty_printer
*pp
) const
56 pp_string (pp
, m_name
);
59 /* class state_machine. */
61 /* state_machine's ctor. */
63 state_machine::state_machine (const char *name
, logger
*logger
)
64 : log_user (logger
), m_name (name
), m_next_state_id (0),
65 m_start (add_state ("start"))
69 /* Add a state with name NAME to this state_machine.
70 The string is required to outlive the state_machine.
72 Return the state_t for the new state. */
74 state_machine::state_t
75 state_machine::add_state (const char *name
)
77 state
*s
= new state (name
, alloc_state_id ());
78 m_states
.safe_push (s
);
82 /* Get the state with name NAME, which must exist.
83 This is purely intended for use in selftests. */
85 state_machine::state_t
86 state_machine::get_state_by_name (const char *name
) const
90 FOR_EACH_VEC_ELT (m_states
, i
, s
)
91 if (!strcmp (name
, s
->get_name ()))
97 /* Dump a multiline representation of this state machine to PP. */
100 state_machine::dump_to_pp (pretty_printer
*pp
) const
104 FOR_EACH_VEC_ELT (m_states
, i
, s
)
106 pp_printf (pp
, " state %i: ", i
);
112 /* Create instances of the various state machines, each using LOGGER,
113 and populate OUT with them. */
116 make_checkers (auto_delete_vec
<state_machine
> &out
, logger
*logger
)
118 out
.safe_push (make_malloc_state_machine (logger
));
119 out
.safe_push (make_fileptr_state_machine (logger
));
120 /* The "taint" checker must be explicitly enabled (as it currently
121 leads to state explosions that stop the other checkers working). */
122 if (flag_analyzer_checker
)
123 out
.safe_push (make_taint_state_machine (logger
));
124 out
.safe_push (make_sensitive_state_machine (logger
));
125 out
.safe_push (make_signal_state_machine (logger
));
127 /* We only attempt to run the pattern tests if it might have been manually
128 enabled (for DejaGnu purposes). */
129 if (flag_analyzer_checker
)
130 out
.safe_push (make_pattern_test_state_machine (logger
));
132 if (flag_analyzer_checker
)
134 unsigned read_index
, write_index
;
137 /* TODO: this leaks the machines
138 Would be nice to log the things that were removed. */
139 VEC_ORDERED_REMOVE_IF (out
, read_index
, write_index
, sm
,
140 0 != strcmp (flag_analyzer_checker
,
141 (*sm
)->get_name ()));
147 #endif /* #if ENABLE_ANALYZER */