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Diffstat (limited to 'nptl/tst-audit-threads.h')
-rw-r--r-- | nptl/tst-audit-threads.h | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/nptl/tst-audit-threads.h b/nptl/tst-audit-threads.h new file mode 100644 index 0000000000..81885d721c --- /dev/null +++ b/nptl/tst-audit-threads.h @@ -0,0 +1,92 @@ +/* Helper header for test-audit-threads. + + Copyright (C) 2018-2019 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <https://www.gnu.org/licenses/>. */ + +/* We use this helper to create a large number of functions, all of + which will be resolved lazily and thus have their PLT updated. + This is done to provide enough functions that we can statistically + observe a thread vs. PLT resolution failure if one exists. */ + +#define CONCAT(a, b) a ## b +#define NUM(x, y) CONCAT (x, y) + +#define FUNC10(x) \ + FUNC (NUM (x, 0)); \ + FUNC (NUM (x, 1)); \ + FUNC (NUM (x, 2)); \ + FUNC (NUM (x, 3)); \ + FUNC (NUM (x, 4)); \ + FUNC (NUM (x, 5)); \ + FUNC (NUM (x, 6)); \ + FUNC (NUM (x, 7)); \ + FUNC (NUM (x, 8)); \ + FUNC (NUM (x, 9)) + +#define FUNC100(x) \ + FUNC10 (NUM (x, 0)); \ + FUNC10 (NUM (x, 1)); \ + FUNC10 (NUM (x, 2)); \ + FUNC10 (NUM (x, 3)); \ + FUNC10 (NUM (x, 4)); \ + FUNC10 (NUM (x, 5)); \ + FUNC10 (NUM (x, 6)); \ + FUNC10 (NUM (x, 7)); \ + FUNC10 (NUM (x, 8)); \ + FUNC10 (NUM (x, 9)) + +#define FUNC1000(x) \ + FUNC100 (NUM (x, 0)); \ + FUNC100 (NUM (x, 1)); \ + FUNC100 (NUM (x, 2)); \ + FUNC100 (NUM (x, 3)); \ + FUNC100 (NUM (x, 4)); \ + FUNC100 (NUM (x, 5)); \ + FUNC100 (NUM (x, 6)); \ + FUNC100 (NUM (x, 7)); \ + FUNC100 (NUM (x, 8)); \ + FUNC100 (NUM (x, 9)) + +#define FUNC7000() \ + FUNC1000 (1); \ + FUNC1000 (2); \ + FUNC1000 (3); \ + FUNC1000 (4); \ + FUNC1000 (5); \ + FUNC1000 (6); \ + FUNC1000 (7); + +#ifdef FUNC +# undef FUNC +#endif + +#ifdef externnum +# define FUNC(x) extern int CONCAT (retNum, x) (void) +#endif + +#ifdef definenum +# define FUNC(x) int CONCAT (retNum, x) (void) { return x; } +#endif + +#ifdef callnum +# define FUNC(x) CONCAT (retNum, x) (); sync_all (x) +#endif + +/* A value of 7000 functions is chosen as an arbitrarily large + number of functions that will allow us enough attempts to + verify lazy resolution operation. */ +FUNC7000 (); |