Daily bump.
[official-gcc.git] / gcc / sancov.c
blob1651989ea2429ec372149835bb4636a8048051ce
1 /* Code coverage instrumentation for fuzzing.
2 Copyright (C) 2015-2017 Free Software Foundation, Inc.
3 Contributed by Dmitry Vyukov <dvyukov@google.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
10 version.
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
15 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/>. */
21 #include "config.h"
22 #include "system.h"
23 #include "coretypes.h"
24 #include "backend.h"
25 #include "tree.h"
26 #include "gimple.h"
27 #include "basic-block.h"
28 #include "options.h"
29 #include "flags.h"
30 #include "stmt.h"
31 #include "gimple-iterator.h"
32 #include "tree-cfg.h"
33 #include "tree-pass.h"
34 #include "tree-iterator.h"
35 #include "asan.h"
37 namespace {
39 unsigned
40 sancov_pass (function *fun)
42 initialize_sanitizer_builtins ();
44 /* Insert callback into beginning of every BB. */
45 tree fndecl = builtin_decl_implicit (BUILT_IN_SANITIZER_COV_TRACE_PC);
46 basic_block bb;
47 FOR_EACH_BB_FN (bb, fun)
49 gimple_stmt_iterator gsi = gsi_start_nondebug_after_labels_bb (bb);
50 if (gsi_end_p (gsi))
51 continue;
52 gimple *stmt = gsi_stmt (gsi);
53 gimple *gcall = gimple_build_call (fndecl, 0);
54 gimple_set_location (gcall, gimple_location (stmt));
55 gsi_insert_before (&gsi, gcall, GSI_SAME_STMT);
57 return 0;
60 template <bool O0> class pass_sancov : public gimple_opt_pass
62 public:
63 pass_sancov (gcc::context *ctxt) : gimple_opt_pass (data, ctxt) {}
65 static const pass_data data;
66 opt_pass *
67 clone ()
69 return new pass_sancov<O0> (m_ctxt);
71 virtual bool
72 gate (function *)
74 return flag_sanitize_coverage && (!O0 || !optimize);
76 virtual unsigned int
77 execute (function *fun)
79 return sancov_pass (fun);
81 }; // class pass_sancov
83 template <bool O0>
84 const pass_data pass_sancov<O0>::data = {
85 GIMPLE_PASS, /* type */
86 O0 ? "sancov_O0" : "sancov", /* name */
87 OPTGROUP_NONE, /* optinfo_flags */
88 TV_NONE, /* tv_id */
89 (PROP_cfg), /* properties_required */
90 0, /* properties_provided */
91 0, /* properties_destroyed */
92 0, /* todo_flags_start */
93 TODO_update_ssa, /* todo_flags_finish */
96 } // anon namespace
98 gimple_opt_pass *
99 make_pass_sancov (gcc::context *ctxt)
101 return new pass_sancov<false> (ctxt);
104 gimple_opt_pass *
105 make_pass_sancov_O0 (gcc::context *ctxt)
107 return new pass_sancov<true> (ctxt);