gcc/selftest.h

   1 /* A self-testing framework, for use by -fself-test.
   2    Copyright (C) 2015-2022 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify it under
   7 the terms of the GNU General Public License as published by the Free
   8 Software Foundation; either version 3, or (at your option) any later
   9 version.
  10
  11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GCC; see the file COPYING3.  If not see
  18 <http://www.gnu.org/licenses/>.  */
  19
  20 #ifndef GCC_SELFTEST_H
  21 #define GCC_SELFTEST_H
  22
  23 /* The selftest code should entirely disappear in a production
  24    configuration, hence we guard all of it with #if CHECKING_P.  */
  25
  26 #if CHECKING_P
  27
  28 namespace selftest {
  29
  30 /* A struct describing the source-location of a selftest, to make it
  31    easier to track down failing tests.  */
  32
  33 class location
  34 {
  35 public:
  36   location (const char *file, int line, const char *function)
  37     : m_file (file), m_line (line), m_function (function) {}
  38
  39   const char *m_file;
  40   int m_line;
  41   const char *m_function;
  42 };
  43
  44 /* A macro for use in selftests and by the ASSERT_ macros below,
  45    constructing a selftest::location for the current source location.  */
  46
  47 #define SELFTEST_LOCATION \
  48   (::selftest::location (__FILE__, __LINE__, __FUNCTION__))
  49
  50 /* The entrypoint for running all tests.  */
  51
  52 extern void run_tests ();
  53
  54 /* Record the successful outcome of some aspect of the test.  */
  55
  56 extern void pass (const location &loc, const char *msg);
  57
  58 /* Report the failed outcome of some aspect of the test and abort.  */
  59
  60 extern void fail (const location &loc, const char *msg)
  61   ATTRIBUTE_NORETURN;
  62
  63 /* As "fail", but using printf-style formatted output.  */
  64
  65 extern void fail_formatted (const location &loc, const char *fmt, ...)
  66   ATTRIBUTE_PRINTF_2 ATTRIBUTE_NORETURN;
  67
  68 /* Implementation detail of ASSERT_STREQ.  */
  69
  70 extern void assert_streq (const location &loc,
  71                           const char *desc_val1, const char *desc_val2,
  72                           const char *val1, const char *val2);
  73
  74 /* Implementation detail of ASSERT_STR_CONTAINS.  */
  75
  76 extern void assert_str_contains (const location &loc,
  77                                  const char *desc_haystack,
  78                                  const char *desc_needle,
  79                                  const char *val_haystack,
  80                                  const char *val_needle);
  81
  82 /* Implementation detail of ASSERT_STR_STARTSWITH.  */
  83
  84 extern void assert_str_startswith (const location &loc,
  85                                    const char *desc_str,
  86                                    const char *desc_prefix,
  87                                    const char *val_str,
  88                                    const char *val_prefix);
  89
  90
  91 /* A named temporary file for use in selftests.
  92    Usable for writing out files, and as the base class for
  93    temp_source_file.
  94    The file is unlinked in the destructor.  */
  95
  96 class named_temp_file
  97 {
  98  public:
  99   named_temp_file (const char *suffix);
 100   ~named_temp_file ();
 101   const char *get_filename () const { return m_filename; }
 102
 103  private:
 104   char *m_filename;
 105 };
 106
 107 /* A class for writing out a temporary sourcefile for use in selftests
 108    of input handling.  */
 109
 110 class temp_source_file : public named_temp_file
 111 {
 112  public:
 113   temp_source_file (const location &loc, const char *suffix,
 114                     const char *content);
 115   temp_source_file (const location &loc, const char *suffix,
 116                     const char *content, size_t sz);
 117 };
 118
 119 /* RAII-style class for avoiding introducing locale-specific differences
 120    in strings containing localized quote marks, by temporarily overriding
 121    the "open_quote" and "close_quote" globals to something hardcoded.
 122
 123    Specifically, the C locale's values are used:
 124    - open_quote becomes "`"
 125    - close_quote becomes "'"
 126    for the lifetime of the object.  */
 127
 128 class auto_fix_quotes
 129 {
 130  public:
 131   auto_fix_quotes ();
 132   ~auto_fix_quotes ();
 133
 134  private:
 135   const char *m_saved_open_quote;
 136   const char *m_saved_close_quote;
 137 };
 138
 139 /* Various selftests involving location-handling require constructing a
 140    line table and one or more line maps within it.
 141
 142    For maximum test coverage we want to run these tests with a variety
 143    of situations:
 144    - line_table->default_range_bits: some frontends use a non-zero value
 145    and others use zero
 146    - the fallback modes within line-map.cc: there are various threshold
 147    values for location_t beyond line-map.cc changes
 148    behavior (disabling of the range-packing optimization, disabling
 149    of column-tracking).  We can exercise these by starting the line_table
 150    at interesting values at or near these thresholds.
 151
 152    The following struct describes a particular case within our test
 153    matrix.  */
 154
 155 class line_table_case;
 156
 157 /* A class for overriding the global "line_table" within a selftest,
 158    restoring its value afterwards.  At most one instance of this
 159    class can exist at once, due to the need to keep the old value
 160    of line_table as a GC root.  */
 161
 162 class line_table_test
 163 {
 164  public:
 165   /* Default constructor.  Override "line_table", using sane defaults
 166      for the temporary line_table.  */
 167   line_table_test ();
 168
 169   /* Constructor.  Override "line_table", using the case described by C.  */
 170   line_table_test (const line_table_case &c);
 171
 172   /* Destructor.  Restore the saved line_table.  */
 173   ~line_table_test ();
 174 };
 175
 176 /* Helper function for selftests that need a function decl.  */
 177
 178 extern tree make_fndecl (tree return_type,
 179                          const char *name,
 180                          vec <tree> &param_types,
 181                          bool is_variadic = false);
 182
 183 /* Run TESTCASE multiple times, once for each case in our test matrix.  */
 184
 185 extern void
 186 for_each_line_table_case (void (*testcase) (const line_table_case &));
 187
 188 /* Read the contents of PATH into memory, returning a 0-terminated buffer
 189    that must be freed by the caller.
 190    Fail (and abort) if there are any problems, with LOC as the reported
 191    location of the failure.  */
 192
 193 extern char *read_file (const location &loc, const char *path);
 194
 195 /* Convert a path relative to SRCDIR/gcc/testsuite/selftests
 196    to a real path (either absolute, or relative to pwd).
 197    The result should be freed by the caller.  */
 198
 199 extern char *locate_file (const char *path);
 200
 201 /* The path of SRCDIR/testsuite/selftests.  */
 202
 203 extern const char *path_to_selftest_files;
 204
 205 /* selftest::test_runner is an implementation detail of selftest::run_tests,
 206    exposed here to allow plugins to run their own suites of tests.  */
 207
 208 class test_runner
 209 {
 210  public:
 211   test_runner (const char *name);
 212   ~test_runner ();
 213
 214  private:
 215   const char *m_name;
 216   long m_start_time;
 217 };
 218
 219 /* Declarations for specific families of tests (by source file), in
 220    alphabetical order.  */
 221 extern void attribs_cc_tests ();
 222 extern void bitmap_cc_tests ();
 223 extern void cgraph_cc_tests ();
 224 extern void convert_cc_tests ();
 225 extern void diagnostic_format_json_cc_tests ();
 226 extern void diagnostic_show_locus_cc_tests ();
 227 extern void digraph_cc_tests ();
 228 extern void dumpfile_cc_tests ();
 229 extern void edit_context_cc_tests ();
 230 extern void et_forest_cc_tests ();
 231 extern void fibonacci_heap_cc_tests ();
 232 extern void fold_const_cc_tests ();
 233 extern void function_tests_cc_tests ();
 234 extern void ggc_tests_cc_tests ();
 235 extern void gimple_cc_tests ();
 236 extern void hash_map_tests_cc_tests ();
 237 extern void hash_set_tests_cc_tests ();
 238 extern void input_cc_tests ();
 239 extern void json_cc_tests ();
 240 extern void optinfo_emit_json_cc_tests ();
 241 extern void opts_cc_tests ();
 242 extern void ordered_hash_map_tests_cc_tests ();
 243 extern void predict_cc_tests ();
 244 extern void pretty_print_cc_tests ();
 245 extern void range_tests ();
 246 extern void range_op_tests ();
 247 extern void gimple_range_tests ();
 248 extern void read_rtl_function_cc_tests ();
 249 extern void rtl_tests_cc_tests ();
 250 extern void sbitmap_cc_tests ();
 251 extern void selftest_cc_tests ();
 252 extern void simplify_rtx_cc_tests ();
 253 extern void spellcheck_cc_tests ();
 254 extern void spellcheck_tree_cc_tests ();
 255 extern void splay_tree_cc_tests ();
 256 extern void sreal_cc_tests ();
 257 extern void store_merging_cc_tests ();
 258 extern void tree_cc_tests ();
 259 extern void tree_cfg_cc_tests ();
 260 extern void tree_diagnostic_path_cc_tests ();
 261 extern void tristate_cc_tests ();
 262 extern void typed_splay_tree_cc_tests ();
 263 extern void vec_cc_tests ();
 264 extern void vec_perm_indices_cc_tests ();
 265 extern void wide_int_cc_tests ();
 266 extern void opt_suggestions_cc_tests ();
 267 extern void dbgcnt_cc_tests ();
 268 extern void ipa_modref_tree_cc_tests ();
 269
 270 extern int num_passes;
 271
 272 } /* end of namespace selftest.  */
 273
 274 /* Macros for writing tests.  */
 275
 276 /* Evaluate EXPR and coerce to bool, calling
 277    ::selftest::pass if it is true,
 278    ::selftest::fail if it false.  */
 279
 280 #define ASSERT_TRUE(EXPR)                               \
 281   ASSERT_TRUE_AT (SELFTEST_LOCATION, (EXPR))
 282
 283 /* Like ASSERT_TRUE, but treat LOC as the effective location of the
 284    selftest.  */
 285
 286 #define ASSERT_TRUE_AT(LOC, EXPR)                       \
 287   SELFTEST_BEGIN_STMT                                   \
 288   const char *desc_ = "ASSERT_TRUE (" #EXPR ")";        \
 289   bool actual_ = (EXPR);                                \
 290   if (actual_)                                          \
 291     ::selftest::pass ((LOC), desc_);                    \
 292   else                                                  \
 293     ::selftest::fail ((LOC), desc_);                    \
 294   SELFTEST_END_STMT
 295
 296 /* Evaluate EXPR and coerce to bool, calling
 297    ::selftest::pass if it is false,
 298    ::selftest::fail if it true.  */
 299
 300 #define ASSERT_FALSE(EXPR)                                      \
 301   ASSERT_FALSE_AT (SELFTEST_LOCATION, (EXPR))
 302
 303 /* Like ASSERT_FALSE, but treat LOC as the effective location of the
 304    selftest.  */
 305
 306 #define ASSERT_FALSE_AT(LOC, EXPR)                              \
 307   SELFTEST_BEGIN_STMT                                           \
 308   const char *desc_ = "ASSERT_FALSE (" #EXPR ")";               \
 309   bool actual_ = (EXPR);                                        \
 310   if (actual_)                                                  \
 311     ::selftest::fail ((LOC), desc_);                            \
 312   else                                                          \
 313     ::selftest::pass ((LOC), desc_);                            \
 314   SELFTEST_END_STMT
 315
 316 /* Evaluate VAL1 and VAL2 and compare them with ==, calling
 317    ::selftest::pass if they are equal,
 318    ::selftest::fail if they are non-equal.  */
 319
 320 #define ASSERT_EQ(VAL1, VAL2) \
 321   ASSERT_EQ_AT ((SELFTEST_LOCATION), (VAL1), (VAL2))
 322
 323 /* Like ASSERT_EQ, but treat LOC as the effective location of the
 324    selftest.  */
 325
 326 #define ASSERT_EQ_AT(LOC, VAL1, VAL2)                  \
 327   SELFTEST_BEGIN_STMT                                          \
 328   const char *desc_ = "ASSERT_EQ (" #VAL1 ", " #VAL2 ")"; \
 329   if ((VAL1) == (VAL2))                                \
 330     ::selftest::pass ((LOC), desc_);                           \
 331   else                                                         \
 332     ::selftest::fail ((LOC), desc_);                           \
 333   SELFTEST_END_STMT
 334
 335 /* Evaluate VAL1 and VAL2 and compare them with known_eq, calling
 336    ::selftest::pass if they are always equal,
 337    ::selftest::fail if they might be non-equal.  */
 338
 339 #define ASSERT_KNOWN_EQ(VAL1, VAL2) \
 340   ASSERT_KNOWN_EQ_AT ((SELFTEST_LOCATION), (VAL1), (VAL2))
 341
 342 /* Like ASSERT_KNOWN_EQ, but treat LOC as the effective location of the
 343    selftest.  */
 344
 345 #define ASSERT_KNOWN_EQ_AT(LOC, VAL1, VAL2)                     \
 346   SELFTEST_BEGIN_STMT                                                   \
 347   const char *desc = "ASSERT_KNOWN_EQ (" #VAL1 ", " #VAL2 ")";  \
 348   if (known_eq (VAL1, VAL2))                                    \
 349     ::selftest::pass ((LOC), desc);                                     \
 350   else                                                                  \
 351     ::selftest::fail ((LOC), desc);                                     \
 352   SELFTEST_END_STMT
 353
 354 /* Evaluate VAL1 and VAL2 and compare them with !=, calling
 355    ::selftest::pass if they are non-equal,
 356    ::selftest::fail if they are equal.  */
 357
 358 #define ASSERT_NE(VAL1, VAL2)                          \
 359   SELFTEST_BEGIN_STMT                                          \
 360   const char *desc_ = "ASSERT_NE (" #VAL1 ", " #VAL2 ")"; \
 361   if ((VAL1) != (VAL2))                                \
 362     ::selftest::pass (SELFTEST_LOCATION, desc_);               \
 363   else                                                         \
 364     ::selftest::fail (SELFTEST_LOCATION, desc_);               \
 365   SELFTEST_END_STMT
 366
 367 /* Evaluate VAL1 and VAL2 and compare them with maybe_ne, calling
 368    ::selftest::pass if they might be non-equal,
 369    ::selftest::fail if they are known to be equal.  */
 370
 371 #define ASSERT_MAYBE_NE(VAL1, VAL2) \
 372   ASSERT_MAYBE_NE_AT ((SELFTEST_LOCATION), (VAL1), (VAL2))
 373
 374 /* Like ASSERT_MAYBE_NE, but treat LOC as the effective location of the
 375    selftest.  */
 376
 377 #define ASSERT_MAYBE_NE_AT(LOC, VAL1, VAL2)                     \
 378   SELFTEST_BEGIN_STMT                                                   \
 379   const char *desc = "ASSERT_MAYBE_NE (" #VAL1 ", " #VAL2 ")";  \
 380   if (maybe_ne (VAL1, VAL2))                                    \
 381     ::selftest::pass ((LOC), desc);                                     \
 382   else                                                                  \
 383     ::selftest::fail ((LOC), desc);                                     \
 384   SELFTEST_END_STMT
 385
 386 /* Evaluate LHS and RHS and compare them with >, calling
 387    ::selftest::pass if LHS > RHS,
 388    ::selftest::fail otherwise.  */
 389
 390 #define ASSERT_GT(LHS, RHS)                             \
 391   ASSERT_GT_AT ((SELFTEST_LOCATION), (LHS), (RHS))
 392
 393 /* Like ASSERT_GT, but treat LOC as the effective location of the
 394    selftest.  */
 395
 396 #define ASSERT_GT_AT(LOC, LHS, RHS)                    \
 397   SELFTEST_BEGIN_STMT                                          \
 398   const char *desc_ = "ASSERT_GT (" #LHS ", " #RHS ")";        \
 399   if ((LHS) > (RHS))                                           \
 400     ::selftest::pass ((LOC), desc_);                           \
 401   else                                                         \
 402     ::selftest::fail ((LOC), desc_);                           \
 403   SELFTEST_END_STMT
 404
 405 /* Evaluate LHS and RHS and compare them with <, calling
 406    ::selftest::pass if LHS < RHS,
 407    ::selftest::fail otherwise.  */
 408
 409 #define ASSERT_LT(LHS, RHS)                             \
 410   ASSERT_LT_AT ((SELFTEST_LOCATION), (LHS), (RHS))
 411
 412 /* Like ASSERT_LT, but treat LOC as the effective location of the
 413    selftest.  */
 414
 415 #define ASSERT_LT_AT(LOC, LHS, RHS)                    \
 416   SELFTEST_BEGIN_STMT                                          \
 417   const char *desc_ = "ASSERT_LT (" #LHS ", " #RHS ")";        \
 418   if ((LHS) < (RHS))                                           \
 419     ::selftest::pass ((LOC), desc_);                           \
 420   else                                                         \
 421     ::selftest::fail ((LOC), desc_);                           \
 422   SELFTEST_END_STMT
 423
 424 /* Evaluate VAL1 and VAL2 and compare them with strcmp, calling
 425    ::selftest::pass if they are equal (and both are non-NULL),
 426    ::selftest::fail if they are non-equal, or are both NULL.  */
 427
 428 #define ASSERT_STREQ(VAL1, VAL2)                                    \
 429   SELFTEST_BEGIN_STMT                                               \
 430   ::selftest::assert_streq (SELFTEST_LOCATION, #VAL1, #VAL2, \
 431                             (VAL1), (VAL2));                \
 432   SELFTEST_END_STMT
 433
 434 /* Like ASSERT_STREQ, but treat LOC as the effective location of the
 435    selftest.  */
 436
 437 #define ASSERT_STREQ_AT(LOC, VAL1, VAL2)                            \
 438   SELFTEST_BEGIN_STMT                                               \
 439   ::selftest::assert_streq ((LOC), #VAL1, #VAL2,                    \
 440                             (VAL1), (VAL2));                \
 441   SELFTEST_END_STMT
 442
 443 /* Evaluate HAYSTACK and NEEDLE and use strstr to determine if NEEDLE
 444    is within HAYSTACK.
 445    ::selftest::pass if NEEDLE is found.
 446    ::selftest::fail if it is not found.  */
 447
 448 #define ASSERT_STR_CONTAINS(HAYSTACK, NEEDLE)                           \
 449   SELFTEST_BEGIN_STMT                                                   \
 450   ::selftest::assert_str_contains (SELFTEST_LOCATION, #HAYSTACK, #NEEDLE, \
 451                                    (HAYSTACK), (NEEDLE));               \
 452   SELFTEST_END_STMT
 453
 454 /* Like ASSERT_STR_CONTAINS, but treat LOC as the effective location of the
 455    selftest.  */
 456
 457 #define ASSERT_STR_CONTAINS_AT(LOC, HAYSTACK, NEEDLE)                   \
 458   SELFTEST_BEGIN_STMT                                                   \
 459   ::selftest::assert_str_contains (LOC, #HAYSTACK, #NEEDLE,             \
 460                                    (HAYSTACK), (NEEDLE));               \
 461   SELFTEST_END_STMT
 462
 463 /* Evaluate STR and PREFIX and determine if STR starts with PREFIX.
 464      ::selftest::pass if STR does start with PREFIX.
 465      ::selftest::fail if does not, or either is NULL.  */
 466
 467 #define ASSERT_STR_STARTSWITH(STR, PREFIX)                                  \
 468   SELFTEST_BEGIN_STMT                                                       \
 469   ::selftest::assert_str_startswith (SELFTEST_LOCATION, #STR, #PREFIX,      \
 470                                      (STR), (PREFIX));                      \
 471   SELFTEST_END_STMT
 472
 473 /* Evaluate PRED1 (VAL1), calling ::selftest::pass if it is true,
 474    ::selftest::fail if it is false.  */
 475
 476 #define ASSERT_PRED1(PRED1, VAL1)                               \
 477   SELFTEST_BEGIN_STMT                                           \
 478   const char *desc_ = "ASSERT_PRED1 (" #PRED1 ", " #VAL1 ")";   \
 479   bool actual_ = (PRED1) (VAL1);                                \
 480   if (actual_)                                                  \
 481     ::selftest::pass (SELFTEST_LOCATION, desc_);                \
 482   else                                                          \
 483     ::selftest::fail (SELFTEST_LOCATION, desc_);                \
 484   SELFTEST_END_STMT
 485
 486 #define SELFTEST_BEGIN_STMT do {
 487 #define SELFTEST_END_STMT   } while (0)
 488
 489 #endif /* #if CHECKING_P */
 490
 491 #endif /* GCC_SELFTEST_H */