gcc/selftest.h

   1 /* A self-testing framework, for use by -fself-test.
   2    Copyright (C) 2015-2021 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 };
 116
 117 /* RAII-style class for avoiding introducing locale-specific differences
 118    in strings containing localized quote marks, by temporarily overriding
 119    the "open_quote" and "close_quote" globals to something hardcoded.
 120
 121    Specifically, the C locale's values are used:
 122    - open_quote becomes "`"
 123    - close_quote becomes "'"
 124    for the lifetime of the object.  */
 125
 126 class auto_fix_quotes
 127 {
 128  public:
 129   auto_fix_quotes ();
 130   ~auto_fix_quotes ();
 131
 132  private:
 133   const char *m_saved_open_quote;
 134   const char *m_saved_close_quote;
 135 };
 136
 137 /* Various selftests involving location-handling require constructing a
 138    line table and one or more line maps within it.
 139
 140    For maximum test coverage we want to run these tests with a variety
 141    of situations:
 142    - line_table->default_range_bits: some frontends use a non-zero value
 143    and others use zero
 144    - the fallback modes within line-map.c: there are various threshold
 145    values for location_t beyond line-map.c changes
 146    behavior (disabling of the range-packing optimization, disabling
 147    of column-tracking).  We can exercise these by starting the line_table
 148    at interesting values at or near these thresholds.
 149
 150    The following struct describes a particular case within our test
 151    matrix.  */
 152
 153 class line_table_case;
 154
 155 /* A class for overriding the global "line_table" within a selftest,
 156    restoring its value afterwards.  At most one instance of this
 157    class can exist at once, due to the need to keep the old value
 158    of line_table as a GC root.  */
 159
 160 class line_table_test
 161 {
 162  public:
 163   /* Default constructor.  Override "line_table", using sane defaults
 164      for the temporary line_table.  */
 165   line_table_test ();
 166
 167   /* Constructor.  Override "line_table", using the case described by C.  */
 168   line_table_test (const line_table_case &c);
 169
 170   /* Destructor.  Restore the saved line_table.  */
 171   ~line_table_test ();
 172 };
 173
 174 /* Helper function for selftests that need a function decl.  */
 175
 176 extern tree make_fndecl (tree return_type,
 177                          const char *name,
 178                          vec <tree> &param_types,
 179                          bool is_variadic = false);
 180
 181 /* Run TESTCASE multiple times, once for each case in our test matrix.  */
 182
 183 extern void
 184 for_each_line_table_case (void (*testcase) (const line_table_case &));
 185
 186 /* Read the contents of PATH into memory, returning a 0-terminated buffer
 187    that must be freed by the caller.
 188    Fail (and abort) if there are any problems, with LOC as the reported
 189    location of the failure.  */
 190
 191 extern char *read_file (const location &loc, const char *path);
 192
 193 /* Convert a path relative to SRCDIR/gcc/testsuite/selftests
 194    to a real path (either absolute, or relative to pwd).
 195    The result should be freed by the caller.  */
 196
 197 extern char *locate_file (const char *path);
 198
 199 /* The path of SRCDIR/testsuite/selftests.  */
 200
 201 extern const char *path_to_selftest_files;
 202
 203 /* selftest::test_runner is an implementation detail of selftest::run_tests,
 204    exposed here to allow plugins to run their own suites of tests.  */
 205
 206 class test_runner
 207 {
 208  public:
 209   test_runner (const char *name);
 210   ~test_runner ();
 211
 212  private:
 213   const char *m_name;
 214   long m_start_time;
 215 };
 216
 217 /* Declarations for specific families of tests (by source file), in
 218    alphabetical order.  */
 219 extern void attribute_c_tests ();
 220 extern void bitmap_c_tests ();
 221 extern void cgraph_c_tests ();
 222 extern void convert_c_tests ();
 223 extern void diagnostic_c_tests ();
 224 extern void diagnostic_format_json_cc_tests ();
 225 extern void diagnostic_show_locus_c_tests ();
 226 extern void digraph_cc_tests ();
 227 extern void dumpfile_c_tests ();
 228 extern void edit_context_c_tests ();
 229 extern void et_forest_c_tests ();
 230 extern void fibonacci_heap_c_tests ();
 231 extern void fold_const_c_tests ();
 232 extern void function_tests_c_tests ();
 233 extern void ggc_tests_c_tests ();
 234 extern void gimple_c_tests ();
 235 extern void hash_map_tests_c_tests ();
 236 extern void hash_set_tests_c_tests ();
 237 extern void input_c_tests ();
 238 extern void json_cc_tests ();
 239 extern void opt_problem_cc_tests ();
 240 extern void optinfo_emit_json_cc_tests ();
 241 extern void opts_c_tests ();
 242 extern void ordered_hash_map_tests_cc_tests ();
 243 extern void predict_c_tests ();
 244 extern void pretty_print_c_tests ();
 245 extern void range_tests ();
 246 extern void range_op_tests ();
 247 extern void gimple_range_tests ();
 248 extern void read_rtl_function_c_tests ();
 249 extern void rtl_tests_c_tests ();
 250 extern void sbitmap_c_tests ();
 251 extern void selftest_c_tests ();
 252 extern void simplify_rtx_c_tests ();
 253 extern void spellcheck_c_tests ();
 254 extern void spellcheck_tree_c_tests ();
 255 extern void splay_tree_cc_tests ();
 256 extern void sreal_c_tests ();
 257 extern void store_merging_c_tests ();
 258 extern void tree_c_tests ();
 259 extern void tree_cfg_c_tests ();
 260 extern void tree_diagnostic_path_cc_tests ();
 261 extern void tristate_cc_tests ();
 262 extern void typed_splay_tree_c_tests ();
 263 extern void unique_ptr_tests_cc_tests ();
 264 extern void vec_c_tests ();
 265 extern void vec_perm_indices_c_tests ();
 266 extern void wide_int_cc_tests ();
 267 extern void opt_proposer_c_tests ();
 268 extern void dbgcnt_c_tests ();
 269 extern void ipa_modref_tree_c_tests ();
 270
 271 extern int num_passes;
 272
 273 } /* end of namespace selftest.  */
 274
 275 /* Macros for writing tests.  */
 276
 277 /* Evaluate EXPR and coerce to bool, calling
 278    ::selftest::pass if it is true,
 279    ::selftest::fail if it false.  */
 280
 281 #define ASSERT_TRUE(EXPR)                               \
 282   ASSERT_TRUE_AT (SELFTEST_LOCATION, (EXPR))
 283
 284 /* Like ASSERT_TRUE, but treat LOC as the effective location of the
 285    selftest.  */
 286
 287 #define ASSERT_TRUE_AT(LOC, EXPR)                       \
 288   SELFTEST_BEGIN_STMT                                   \
 289   const char *desc_ = "ASSERT_TRUE (" #EXPR ")";        \
 290   bool actual_ = (EXPR);                                \
 291   if (actual_)                                          \
 292     ::selftest::pass ((LOC), desc_);                    \
 293   else                                                  \
 294     ::selftest::fail ((LOC), desc_);                    \
 295   SELFTEST_END_STMT
 296
 297 /* Evaluate EXPR and coerce to bool, calling
 298    ::selftest::pass if it is false,
 299    ::selftest::fail if it true.  */
 300
 301 #define ASSERT_FALSE(EXPR)                                      \
 302   ASSERT_FALSE_AT (SELFTEST_LOCATION, (EXPR))
 303
 304 /* Like ASSERT_FALSE, but treat LOC as the effective location of the
 305    selftest.  */
 306
 307 #define ASSERT_FALSE_AT(LOC, EXPR)                              \
 308   SELFTEST_BEGIN_STMT                                           \
 309   const char *desc_ = "ASSERT_FALSE (" #EXPR ")";               \
 310   bool actual_ = (EXPR);                                        \
 311   if (actual_)                                                  \
 312     ::selftest::fail ((LOC), desc_);                            \
 313   else                                                          \
 314     ::selftest::pass ((LOC), desc_);                            \
 315   SELFTEST_END_STMT
 316
 317 /* Evaluate VAL1 and VAL2 and compare them with ==, calling
 318    ::selftest::pass if they are equal,
 319    ::selftest::fail if they are non-equal.  */
 320
 321 #define ASSERT_EQ(VAL1, VAL2) \
 322   ASSERT_EQ_AT ((SELFTEST_LOCATION), (VAL1), (VAL2))
 323
 324 /* Like ASSERT_EQ, but treat LOC as the effective location of the
 325    selftest.  */
 326
 327 #define ASSERT_EQ_AT(LOC, VAL1, VAL2)                  \
 328   SELFTEST_BEGIN_STMT                                          \
 329   const char *desc_ = "ASSERT_EQ (" #VAL1 ", " #VAL2 ")"; \
 330   if ((VAL1) == (VAL2))                                \
 331     ::selftest::pass ((LOC), desc_);                           \
 332   else                                                         \
 333     ::selftest::fail ((LOC), desc_);                           \
 334   SELFTEST_END_STMT
 335
 336 /* Evaluate VAL1 and VAL2 and compare them with known_eq, calling
 337    ::selftest::pass if they are always equal,
 338    ::selftest::fail if they might be non-equal.  */
 339
 340 #define ASSERT_KNOWN_EQ(VAL1, VAL2) \
 341   ASSERT_KNOWN_EQ_AT ((SELFTEST_LOCATION), (VAL1), (VAL2))
 342
 343 /* Like ASSERT_KNOWN_EQ, but treat LOC as the effective location of the
 344    selftest.  */
 345
 346 #define ASSERT_KNOWN_EQ_AT(LOC, VAL1, VAL2)                     \
 347   SELFTEST_BEGIN_STMT                                                   \
 348   const char *desc = "ASSERT_KNOWN_EQ (" #VAL1 ", " #VAL2 ")";  \
 349   if (known_eq (VAL1, VAL2))                                    \
 350     ::selftest::pass ((LOC), desc);                                     \
 351   else                                                                  \
 352     ::selftest::fail ((LOC), desc);                                     \
 353   SELFTEST_END_STMT
 354
 355 /* Evaluate VAL1 and VAL2 and compare them with !=, calling
 356    ::selftest::pass if they are non-equal,
 357    ::selftest::fail if they are equal.  */
 358
 359 #define ASSERT_NE(VAL1, VAL2)                          \
 360   SELFTEST_BEGIN_STMT                                          \
 361   const char *desc_ = "ASSERT_NE (" #VAL1 ", " #VAL2 ")"; \
 362   if ((VAL1) != (VAL2))                                \
 363     ::selftest::pass (SELFTEST_LOCATION, desc_);               \
 364   else                                                         \
 365     ::selftest::fail (SELFTEST_LOCATION, desc_);               \
 366   SELFTEST_END_STMT
 367
 368 /* Evaluate VAL1 and VAL2 and compare them with maybe_ne, calling
 369    ::selftest::pass if they might be non-equal,
 370    ::selftest::fail if they are known to be equal.  */
 371
 372 #define ASSERT_MAYBE_NE(VAL1, VAL2) \
 373   ASSERT_MAYBE_NE_AT ((SELFTEST_LOCATION), (VAL1), (VAL2))
 374
 375 /* Like ASSERT_MAYBE_NE, but treat LOC as the effective location of the
 376    selftest.  */
 377
 378 #define ASSERT_MAYBE_NE_AT(LOC, VAL1, VAL2)                     \
 379   SELFTEST_BEGIN_STMT                                                   \
 380   const char *desc = "ASSERT_MAYBE_NE (" #VAL1 ", " #VAL2 ")";  \
 381   if (maybe_ne (VAL1, VAL2))                                    \
 382     ::selftest::pass ((LOC), desc);                                     \
 383   else                                                                  \
 384     ::selftest::fail ((LOC), desc);                                     \
 385   SELFTEST_END_STMT
 386
 387 /* Evaluate LHS and RHS and compare them with >, calling
 388    ::selftest::pass if LHS > RHS,
 389    ::selftest::fail otherwise.  */
 390
 391 #define ASSERT_GT(LHS, RHS)                             \
 392   ASSERT_GT_AT ((SELFTEST_LOCATION), (LHS), (RHS))
 393
 394 /* Like ASSERT_GT, but treat LOC as the effective location of the
 395    selftest.  */
 396
 397 #define ASSERT_GT_AT(LOC, LHS, RHS)                    \
 398   SELFTEST_BEGIN_STMT                                          \
 399   const char *desc_ = "ASSERT_GT (" #LHS ", " #RHS ")";        \
 400   if ((LHS) > (RHS))                                           \
 401     ::selftest::pass ((LOC), desc_);                           \
 402   else                                                         \
 403     ::selftest::fail ((LOC), desc_);                           \
 404   SELFTEST_END_STMT
 405
 406 /* Evaluate LHS and RHS and compare them with <, calling
 407    ::selftest::pass if LHS < RHS,
 408    ::selftest::fail otherwise.  */
 409
 410 #define ASSERT_LT(LHS, RHS)                             \
 411   ASSERT_LT_AT ((SELFTEST_LOCATION), (LHS), (RHS))
 412
 413 /* Like ASSERT_LT, but treat LOC as the effective location of the
 414    selftest.  */
 415
 416 #define ASSERT_LT_AT(LOC, LHS, RHS)                    \
 417   SELFTEST_BEGIN_STMT                                          \
 418   const char *desc_ = "ASSERT_LT (" #LHS ", " #RHS ")";        \
 419   if ((LHS) < (RHS))                                           \
 420     ::selftest::pass ((LOC), desc_);                           \
 421   else                                                         \
 422     ::selftest::fail ((LOC), desc_);                           \
 423   SELFTEST_END_STMT
 424
 425 /* Evaluate VAL1 and VAL2 and compare them with strcmp, calling
 426    ::selftest::pass if they are equal (and both are non-NULL),
 427    ::selftest::fail if they are non-equal, or are both NULL.  */
 428
 429 #define ASSERT_STREQ(VAL1, VAL2)                                    \
 430   SELFTEST_BEGIN_STMT                                               \
 431   ::selftest::assert_streq (SELFTEST_LOCATION, #VAL1, #VAL2, \
 432                             (VAL1), (VAL2));                \
 433   SELFTEST_END_STMT
 434
 435 /* Like ASSERT_STREQ, but treat LOC as the effective location of the
 436    selftest.  */
 437
 438 #define ASSERT_STREQ_AT(LOC, VAL1, VAL2)                            \
 439   SELFTEST_BEGIN_STMT                                               \
 440   ::selftest::assert_streq ((LOC), #VAL1, #VAL2,                    \
 441                             (VAL1), (VAL2));                \
 442   SELFTEST_END_STMT
 443
 444 /* Evaluate HAYSTACK and NEEDLE and use strstr to determine if NEEDLE
 445    is within HAYSTACK.
 446    ::selftest::pass if NEEDLE is found.
 447    ::selftest::fail if it is not found.  */
 448
 449 #define ASSERT_STR_CONTAINS(HAYSTACK, NEEDLE)                           \
 450   SELFTEST_BEGIN_STMT                                                   \
 451   ::selftest::assert_str_contains (SELFTEST_LOCATION, #HAYSTACK, #NEEDLE, \
 452                                    (HAYSTACK), (NEEDLE));               \
 453   SELFTEST_END_STMT
 454
 455 /* Like ASSERT_STR_CONTAINS, but treat LOC as the effective location of the
 456    selftest.  */
 457
 458 #define ASSERT_STR_CONTAINS_AT(LOC, HAYSTACK, NEEDLE)                   \
 459   SELFTEST_BEGIN_STMT                                                   \
 460   ::selftest::assert_str_contains (LOC, #HAYSTACK, #NEEDLE,             \
 461                                    (HAYSTACK), (NEEDLE));               \
 462   SELFTEST_END_STMT
 463
 464 /* Evaluate STR and PREFIX and determine if STR starts with PREFIX.
 465      ::selftest::pass if STR does start with PREFIX.
 466      ::selftest::fail if does not, or either is NULL.  */
 467
 468 #define ASSERT_STR_STARTSWITH(STR, PREFIX)                                  \
 469   SELFTEST_BEGIN_STMT                                                       \
 470   ::selftest::assert_str_startswith (SELFTEST_LOCATION, #STR, #PREFIX,      \
 471                                      (STR), (PREFIX));                      \
 472   SELFTEST_END_STMT
 473
 474 /* Evaluate PRED1 (VAL1), calling ::selftest::pass if it is true,
 475    ::selftest::fail if it is false.  */
 476
 477 #define ASSERT_PRED1(PRED1, VAL1)                               \
 478   SELFTEST_BEGIN_STMT                                           \
 479   const char *desc_ = "ASSERT_PRED1 (" #PRED1 ", " #VAL1 ")";   \
 480   bool actual_ = (PRED1) (VAL1);                                \
 481   if (actual_)                                                  \
 482     ::selftest::pass (SELFTEST_LOCATION, desc_);                \
 483   else                                                          \
 484     ::selftest::fail (SELFTEST_LOCATION, desc_);                \
 485   SELFTEST_END_STMT
 486
 487 #define SELFTEST_BEGIN_STMT do {
 488 #define SELFTEST_END_STMT   } while (0)
 489
 490 #endif /* #if CHECKING_P */
 491
 492 #endif /* GCC_SELFTEST_H */