diff options
Diffstat (limited to 'support/tst-support_blob_repeat.c')
| -rw-r--r-- | support/tst-support_blob_repeat.c | 45 |
1 files changed, 32 insertions, 13 deletions
diff --git a/support/tst-support_blob_repeat.c b/support/tst-support_blob_repeat.c index a0eb9d2b89..b61d6b249a 100644 --- a/support/tst-support_blob_repeat.c +++ b/support/tst-support_blob_repeat.c @@ -17,6 +17,7 @@ <https://www.gnu.org/licenses/>. */ #include <stdio.h> +#include <string.h> #include <support/blob_repeat.h> #include <support/check.h> @@ -63,21 +64,39 @@ do_test (void) } support_blob_repeat_free (&repeat); - repeat = support_blob_repeat_allocate ("012345678", 9, 10 * 1000 * 1000); - if (repeat.start == NULL) - puts ("warning: not enough memory for large mapping"); - else + for (int do_shared = 0; do_shared < 2; ++do_shared) { - unsigned char *p = repeat.start; - for (int i = 0; i < 10 * 1000 * 1000; ++i) - for (int j = 0; j <= 8; ++j) - if (p[i * 9 + j] != '0' + j) - { - printf ("error: element %d index %d\n", i, j); - TEST_COMPARE (p[i * 9 + j], '0' + j); - } + if (do_shared) + repeat = support_blob_repeat_allocate_shared ("012345678", 9, + 10 * 1000 * 1000); + else + repeat = support_blob_repeat_allocate ("012345678", 9, + 10 * 1000 * 1000); + if (repeat.start == NULL) + puts ("warning: not enough memory for large mapping"); + else + { + unsigned char *p = repeat.start; + for (int i = 0; i < 10 * 1000 * 1000; ++i) + for (int j = 0; j <= 8; ++j) + if (p[i * 9 + j] != '0' + j) + { + printf ("error: element %d index %d\n", i, j); + TEST_COMPARE (p[i * 9 + j], '0' + j); + } + + enum { total_size = 9 * 10 * 1000 * 1000 }; + p[total_size - 1] = '\0'; + asm ("" ::: "memory"); + if (do_shared) + /* The write is repeated in multiple places earlier in the + string due to page sharing. */ + TEST_VERIFY (strlen (repeat.start) < total_size - 1); + else + TEST_COMPARE (strlen (repeat.start), total_size - 1); + } + support_blob_repeat_free (&repeat); } - support_blob_repeat_free (&repeat); return 0; } |