gcc/selftest.h

   1 /* A self-testing framework, for use by -fself-test.
   2    Copyright (C) 2015-2018 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 struct location
  34 {
  35   location (const char *file, int line, const char *function)
  36     : m_file (file), m_line (line), m_function (function) {}
  37
  38   const char *m_file;
  39   int m_line;
  40   const char *m_function;
  41 };
  42
  43 /* A macro for use in selftests and by the ASSERT_ macros below,
  44    constructing a selftest::location for the current source location.  */
  45
  46 #define SELFTEST_LOCATION \
  47   (::selftest::location (__FILE__, __LINE__, __FUNCTION__))
  48
  49 /* The entrypoint for running all tests.  */
  50
  51 extern void run_tests ();
  52
  53 /* Record the successful outcome of some aspect of the test.  */
  54
  55 extern void pass (const location &loc, const char *msg);
  56
  57 /* Report the failed outcome of some aspect of the test and abort.  */
  58
  59 extern void fail (const location &loc, const char *msg)
  60   ATTRIBUTE_NORETURN;
  61
  62 /* As "fail", but using printf-style formatted output.  */
  63
  64 extern void fail_formatted (const location &loc, const char *fmt, ...)
  65   ATTRIBUTE_PRINTF_2 ATTRIBUTE_NORETURN;
  66
  67 /* Implementation detail of ASSERT_STREQ.  */
  68
  69 extern void assert_streq (const location &loc,
  70                           const char *desc_val1, const char *desc_val2,
  71                           const char *val1, const char *val2);
  72
  73 /* Implementation detail of ASSERT_STR_CONTAINS.  */
  74
  75 extern void assert_str_contains (const location &loc,
  76                                  const char *desc_haystack,
  77                                  const char *desc_needle,
  78                                  const char *val_haystack,
  79                                  const char *val_needle);
  80
  81 /* Implementation detail of ASSERT_STR_STARTSWITH.  */
  82
  83 extern void assert_str_startswith (const location &loc,
  84                                    const char *desc_str,
  85                                    const char *desc_prefix,
  86                                    const char *val_str,
  87                                    const char *val_prefix);
  88
  89
  90 /* A named temporary file for use in selftests.
  91    Usable for writing out files, and as the base class for
  92    temp_source_file.
  93    The file is unlinked in the destructor.  */
  94
  95 class named_temp_file
  96 {
  97  public:
  98   named_temp_file (const char *suffix);
  99   ~named_temp_file ();
 100   const char *get_filename () const { return m_filename; }
 101
 102  private:
 103   char *m_filename;
 104 };
 105
 106 /* A class for writing out a temporary sourcefile for use in selftests
 107    of input handling.  */
 108
 109 class temp_source_file : public named_temp_file
 110 {
 111  public:
 112   temp_source_file (const location &loc, const char *suffix,
 113                     const char *content);
 114 };
 115
 116 /* RAII-style class for avoiding introducing locale-specific differences
 117    in strings containing localized quote marks, by temporarily overriding
 118    the "open_quote" and "close_quote" globals to something hardcoded.
 119
 120    Specifically, the C locale's values are used:
 121    - open_quote becomes "`"
 122    - close_quote becomes "'"
 123    for the lifetime of the object.  */
 124
 125 class auto_fix_quotes
 126 {
 127  public:
 128   auto_fix_quotes ();
 129   ~auto_fix_quotes ();
 130
 131  private:
 132   const char *m_saved_open_quote;
 133   const char *m_saved_close_quote;
 134 };
 135
 136 /* Various selftests involving location-handling require constructing a
 137    line table and one or more line maps within it.
 138
 139    For maximum test coverage we want to run these tests with a variety
 140    of situations:
 141    - line_table->default_range_bits: some frontends use a non-zero value
 142    and others use zero
 143    - the fallback modes within line-map.c: there are various threshold
 144    values for source_location/location_t beyond line-map.c changes
 145    behavior (disabling of the range-packing optimization, disabling
 146    of column-tracking).  We can exercise these by starting the line_table
 147    at interesting values at or near these thresholds.
 148
 149    The following struct describes a particular case within our test
 150    matrix.  */
 151
 152 struct line_table_case;
 153
 154 /* A class for overriding the global "line_table" within a selftest,
 155    restoring its value afterwards.  At most one instance of this
 156    class can exist at once, due to the need to keep the old value
 157    of line_table as a GC root.  */
 158
 159 class line_table_test
 160 {
 161  public:
 162   /* Default constructor.  Override "line_table", using sane defaults
 163      for the temporary line_table.  */
 164   line_table_test ();
 165
 166   /* Constructor.  Override "line_table", using the case described by C.  */
 167   line_table_test (const line_table_case &c);
 168
 169   /* Destructor.  Restore the saved line_table.  */
 170   ~line_table_test ();
 171 };
 172
 173 /* Run TESTCASE multiple times, once for each case in our test matrix.  */
 174
 175 extern void
 176 for_each_line_table_case (void (*testcase) (const line_table_case &));
 177
 178 /* Read the contents of PATH into memory, returning a 0-terminated buffer
 179    that must be freed by the caller.
 180    Fail (and abort) if there are any problems, with LOC as the reported
 181    location of the failure.  */
 182
 183 extern char *read_file (const location &loc, const char *path);
 184
 185 /* A helper function for writing tests that interact with the
 186    garbage collector.  */
 187
 188 extern void forcibly_ggc_collect ();
 189
 190 /* Convert a path relative to SRCDIR/gcc/testsuite/selftests
 191    to a real path (either absolute, or relative to pwd).
 192    The result should be freed by the caller.  */
 193
 194 extern char *locate_file (const char *path);
 195
 196 /* The path of SRCDIR/testsuite/selftests.  */
 197
 198 extern const char *path_to_selftest_files;
 199
 200 /* selftest::test_runner is an implementation detail of selftest::run_tests,
 201    exposed here to allow plugins to run their own suites of tests.  */
 202
 203 class test_runner
 204 {
 205  public:
 206   test_runner (const char *name);
 207   ~test_runner ();
 208
 209  private:
 210   const char *m_name;
 211   long m_start_time;
 212 };
 213
 214 /* Declarations for specific families of tests (by source file), in
 215    alphabetical order.  */
 216 extern void attribute_c_tests ();
 217 extern void bitmap_c_tests ();
 218 extern void diagnostic_c_tests ();
 219 extern void diagnostic_show_locus_c_tests ();
 220 extern void dumpfile_c_tests ();
 221 extern void edit_context_c_tests ();
 222 extern void et_forest_c_tests ();
 223 extern void fibonacci_heap_c_tests ();
 224 extern void fold_const_c_tests ();
 225 extern void function_tests_c_tests ();
 226 extern void ggc_tests_c_tests ();
 227 extern void gimple_c_tests ();
 228 extern void hash_map_tests_c_tests ();
 229 extern void hash_set_tests_c_tests ();
 230 extern void input_c_tests ();
 231 extern void predict_c_tests ();
 232 extern void pretty_print_c_tests ();
 233 extern void read_rtl_function_c_tests ();
 234 extern void rtl_tests_c_tests ();
 235 extern void sbitmap_c_tests ();
 236 extern void selftest_c_tests ();
 237 extern void simplify_rtx_c_tests ();
 238 extern void spellcheck_c_tests ();
 239 extern void spellcheck_tree_c_tests ();
 240 extern void sreal_c_tests ();
 241 extern void store_merging_c_tests ();
 242 extern void tree_c_tests ();
 243 extern void tree_cfg_c_tests ();
 244 extern void typed_splay_tree_c_tests ();
 245 extern void unique_ptr_tests_cc_tests ();
 246 extern void vec_c_tests ();
 247 extern void vec_perm_indices_c_tests ();
 248 extern void wide_int_cc_tests ();
 249 extern void opt_proposer_c_tests ();
 250
 251 extern int num_passes;
 252
 253 } /* end of namespace selftest.  */
 254
 255 /* Macros for writing tests.  */
 256
 257 /* Evaluate EXPR and coerce to bool, calling
 258    ::selftest::pass if it is true,
 259    ::selftest::fail if it false.  */
 260
 261 #define ASSERT_TRUE(EXPR)                               \
 262   ASSERT_TRUE_AT (SELFTEST_LOCATION, (EXPR))
 263
 264 /* Like ASSERT_TRUE, but treat LOC as the effective location of the
 265    selftest.  */
 266
 267 #define ASSERT_TRUE_AT(LOC, EXPR)                       \
 268   SELFTEST_BEGIN_STMT                                   \
 269   const char *desc_ = "ASSERT_TRUE (" #EXPR ")";        \
 270   bool actual_ = (EXPR);                                \
 271   if (actual_)                                          \
 272     ::selftest::pass ((LOC), desc_);                    \
 273   else                                                  \
 274     ::selftest::fail ((LOC), desc_);                    \
 275   SELFTEST_END_STMT
 276
 277 /* Evaluate EXPR and coerce to bool, calling
 278    ::selftest::pass if it is false,
 279    ::selftest::fail if it true.  */
 280
 281 #define ASSERT_FALSE(EXPR)                                      \
 282   ASSERT_FALSE_AT (SELFTEST_LOCATION, (EXPR))
 283
 284 /* Like ASSERT_FALSE, but treat LOC as the effective location of the
 285    selftest.  */
 286
 287 #define ASSERT_FALSE_AT(LOC, EXPR)                              \
 288   SELFTEST_BEGIN_STMT                                           \
 289   const char *desc_ = "ASSERT_FALSE (" #EXPR ")";               \
 290   bool actual_ = (EXPR);                                        \
 291   if (actual_)                                                  \
 292     ::selftest::fail ((LOC), desc_);                            \
 293   else                                                          \
 294     ::selftest::pass ((LOC), desc_);                            \
 295   SELFTEST_END_STMT
 296
 297 /* Evaluate VAL1 and VAL2 and compare them with ==, calling
 298    ::selftest::pass if they are equal,
 299    ::selftest::fail if they are non-equal.  */
 300
 301 #define ASSERT_EQ(VAL1, VAL2) \
 302   ASSERT_EQ_AT ((SELFTEST_LOCATION), (VAL1), (VAL2))
 303
 304 /* Like ASSERT_EQ, but treat LOC as the effective location of the
 305    selftest.  */
 306
 307 #define ASSERT_EQ_AT(LOC, VAL1, VAL2)                  \
 308   SELFTEST_BEGIN_STMT                                          \
 309   const char *desc_ = "ASSERT_EQ (" #VAL1 ", " #VAL2 ")"; \
 310   if ((VAL1) == (VAL2))                                \
 311     ::selftest::pass ((LOC), desc_);                           \
 312   else                                                         \
 313     ::selftest::fail ((LOC), desc_);                           \
 314   SELFTEST_END_STMT
 315
 316 /* Evaluate VAL1 and VAL2 and compare them with known_eq, calling
 317    ::selftest::pass if they are always equal,
 318    ::selftest::fail if they might be non-equal.  */
 319
 320 #define ASSERT_KNOWN_EQ(VAL1, VAL2) \
 321   ASSERT_KNOWN_EQ_AT ((SELFTEST_LOCATION), (VAL1), (VAL2))
 322
 323 /* Like ASSERT_KNOWN_EQ, but treat LOC as the effective location of the
 324    selftest.  */
 325
 326 #define ASSERT_KNOWN_EQ_AT(LOC, VAL1, VAL2)                     \
 327   SELFTEST_BEGIN_STMT                                                   \
 328   const char *desc = "ASSERT_KNOWN_EQ (" #VAL1 ", " #VAL2 ")";  \
 329   if (known_eq (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 !=, calling
 336    ::selftest::pass if they are non-equal,
 337    ::selftest::fail if they are equal.  */
 338
 339 #define ASSERT_NE(VAL1, VAL2)                          \
 340   SELFTEST_BEGIN_STMT                                          \
 341   const char *desc_ = "ASSERT_NE (" #VAL1 ", " #VAL2 ")"; \
 342   if ((VAL1) != (VAL2))                                \
 343     ::selftest::pass (SELFTEST_LOCATION, desc_);               \
 344   else                                                         \
 345     ::selftest::fail (SELFTEST_LOCATION, desc_);               \
 346   SELFTEST_END_STMT
 347
 348 /* Evaluate VAL1 and VAL2 and compare them with maybe_ne, calling
 349    ::selftest::pass if they might be non-equal,
 350    ::selftest::fail if they are known to be equal.  */
 351
 352 #define ASSERT_MAYBE_NE(VAL1, VAL2) \
 353   ASSERT_MAYBE_NE_AT ((SELFTEST_LOCATION), (VAL1), (VAL2))
 354
 355 /* Like ASSERT_MAYBE_NE, but treat LOC as the effective location of the
 356    selftest.  */
 357
 358 #define ASSERT_MAYBE_NE_AT(LOC, VAL1, VAL2)                     \
 359   SELFTEST_BEGIN_STMT                                                   \
 360   const char *desc = "ASSERT_MAYBE_NE (" #VAL1 ", " #VAL2 ")";  \
 361   if (maybe_ne (VAL1, VAL2))                                    \
 362     ::selftest::pass ((LOC), desc);                                     \
 363   else                                                                  \
 364     ::selftest::fail ((LOC), desc);                                     \
 365   SELFTEST_END_STMT
 366
 367 /* Evaluate LHS and RHS and compare them with >, calling
 368    ::selftest::pass if LHS > RHS,
 369    ::selftest::fail otherwise.  */
 370
 371 #define ASSERT_GT(LHS, RHS)                             \
 372   ASSERT_GT_AT ((SELFTEST_LOCATION), (LHS), (RHS))
 373
 374 /* Like ASSERT_GT, but treat LOC as the effective location of the
 375    selftest.  */
 376
 377 #define ASSERT_GT_AT(LOC, LHS, RHS)                    \
 378   SELFTEST_BEGIN_STMT                                          \
 379   const char *desc_ = "ASSERT_GT (" #LHS ", " #RHS ")";        \
 380   if ((LHS) > (RHS))                                           \
 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_LT(LHS, RHS)                             \
 391   ASSERT_LT_AT ((SELFTEST_LOCATION), (LHS), (RHS))
 392
 393 /* Like ASSERT_LT, but treat LOC as the effective location of the
 394    selftest.  */
 395
 396 #define ASSERT_LT_AT(LOC, LHS, RHS)                    \
 397   SELFTEST_BEGIN_STMT                                          \
 398   const char *desc_ = "ASSERT_LT (" #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 VAL1 and VAL2 and compare them with strcmp, calling
 406    ::selftest::pass if they are equal (and both are non-NULL),
 407    ::selftest::fail if they are non-equal, or are both NULL.  */
 408
 409 #define ASSERT_STREQ(VAL1, VAL2)                                    \
 410   SELFTEST_BEGIN_STMT                                               \
 411   ::selftest::assert_streq (SELFTEST_LOCATION, #VAL1, #VAL2, \
 412                             (VAL1), (VAL2));                \
 413   SELFTEST_END_STMT
 414
 415 /* Like ASSERT_STREQ, but treat LOC as the effective location of the
 416    selftest.  */
 417
 418 #define ASSERT_STREQ_AT(LOC, VAL1, VAL2)                            \
 419   SELFTEST_BEGIN_STMT                                               \
 420   ::selftest::assert_streq ((LOC), #VAL1, #VAL2,                    \
 421                             (VAL1), (VAL2));                \
 422   SELFTEST_END_STMT
 423
 424 /* Evaluate HAYSTACK and NEEDLE and use strstr to determine if NEEDLE
 425    is within HAYSTACK.
 426    ::selftest::pass if NEEDLE is found.
 427    ::selftest::fail if it is not found.  */
 428
 429 #define ASSERT_STR_CONTAINS(HAYSTACK, NEEDLE)                           \
 430   SELFTEST_BEGIN_STMT                                                   \
 431   ::selftest::assert_str_contains (SELFTEST_LOCATION, #HAYSTACK, #NEEDLE, \
 432                                    (HAYSTACK), (NEEDLE));               \
 433   SELFTEST_END_STMT
 434
 435 /* Evaluate STR and PREFIX and determine if STR starts with PREFIX.
 436      ::selftest::pass if STR does start with PREFIX.
 437      ::selftest::fail if does not, or either is NULL.  */
 438
 439 #define ASSERT_STR_STARTSWITH(STR, PREFIX)                                  \
 440   SELFTEST_BEGIN_STMT                                                       \
 441   ::selftest::assert_str_startswith (SELFTEST_LOCATION, #STR, #PREFIX,      \
 442                                      (STR), (PREFIX));                      \
 443   SELFTEST_END_STMT
 444
 445 /* Evaluate PRED1 (VAL1), calling ::selftest::pass if it is true,
 446    ::selftest::fail if it is false.  */
 447
 448 #define ASSERT_PRED1(PRED1, VAL1)                               \
 449   SELFTEST_BEGIN_STMT                                           \
 450   const char *desc_ = "ASSERT_PRED1 (" #PRED1 ", " #VAL1 ")";   \
 451   bool actual_ = (PRED1) (VAL1);                                \
 452   if (actual_)                                                  \
 453     ::selftest::pass (SELFTEST_LOCATION, desc_);                \
 454   else                                                          \
 455     ::selftest::fail (SELFTEST_LOCATION, desc_);                \
 456   SELFTEST_END_STMT
 457
 458 #define SELFTEST_BEGIN_STMT do {
 459 #define SELFTEST_END_STMT   } while (0)
 460
 461 #endif /* #if CHECKING_P */
 462
 463 #endif /* GCC_SELFTEST_H */