Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/gcc.dg/builtin-stpncpy.c @ 144:8f4e72ab4e11
fix segmentation fault caused by nothing next cur_op to end
author | Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp> |
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date | Sun, 23 Dec 2018 21:23:56 +0900 |
parents | 84e7813d76e9 |
children | 1830386684a0 |
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/* PR tree-optimization/80669 - Bad -Wstringop-overflow warnings for stpncpy { dg-do compile } { dg-options "-O2 -Wall -Wno-array-bounds -Wno-restrict -Wno-stringop-truncation" } */ #define SIZE_MAX __SIZE_MAX__ typedef __SIZE_TYPE__ size_t; void sink (char*); #define stpncpy (d, s, n) sink (__builtin_stpncpy (d, s, n)) size_t value (void); static size_t range (size_t min, size_t max) { size_t val = value (); return val < min || max < val ? min : val; } /* Verify that no -Wstringop-overflow warning is issued for stpncpy with constant size. (Some tests cause -Wstringop-truncation and that's expected). */ void test_cst (char *d) { __builtin_stpncpy (d, "123", 0); __builtin_stpncpy (d, "123", 1); __builtin_stpncpy (d, "123", 2); __builtin_stpncpy (d, "123", 3); __builtin_stpncpy (d, "123", 4); __builtin_stpncpy (d, "123", 5); __builtin_stpncpy (d, "123", 999); size_t n = SIZE_MAX / 2; __builtin_stpncpy (d, "123", n); __builtin_stpncpy (d, "123", n + 1); /* { dg-warning "specified size \[0-9\]+ exceeds maximum object size \[0-9\]+" } */ } /* Verify that no -Wstringop-overflow warning is issued for stpncpy with size in some range. */ void test_rng (char *d) { #define R(min, max) range (min, max) __builtin_stpncpy (d, "123", R (0, 1)); __builtin_stpncpy (d, "123", R (0, 2)); __builtin_stpncpy (d, "123", R (0, 3)); __builtin_stpncpy (d, "123", R (0, 4)); __builtin_stpncpy (d, "123", R (0, 5)); __builtin_stpncpy (d, "123", R (1, 2)); __builtin_stpncpy (d, "123", R (1, 3)); __builtin_stpncpy (d, "123", R (1, 4)); __builtin_stpncpy (d, "123", R (1, 5)); __builtin_stpncpy (d, "123", R (2, 3)); __builtin_stpncpy (d, "123", R (2, 4)); __builtin_stpncpy (d, "123", R (2, 5)); __builtin_stpncpy (d, "123", R (3, 4)); __builtin_stpncpy (d, "123", R (3, 5)); __builtin_stpncpy (d, "123", R (4, 5)); __builtin_stpncpy (d, "123", R (5, 6)); __builtin_stpncpy (d, "123", R (12345, 23456)); size_t n = SIZE_MAX / 2; __builtin_stpncpy (d, "123", R (n - 1, n + 1)); __builtin_stpncpy (d, "123", R (n + 1, n + 2)); /* { dg-warning "specified size between \[0-9\]+ and \[0-9\]+ exceeds maximum object size \[0-9\]+" } */ }