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| author | Jakub Jelinek <jakub@redhat.com> | 2020-04-21 17:06:31 +0200 |
|---|---|---|
| committer | Jakub Jelinek <jakub@redhat.com> | 2020-04-21 17:06:31 +0200 |
| commit | 73f8e9dca5ff891ed19001b213fd1f6ce31417e3 (patch) | |
| tree | 672bb597baac2acd957524d5f12db22395dbf327 /gcc/stor-layout.c | |
| parent | 08d6ec14e654292340ccc6aa5612bbd91d4d57e8 (diff) | |
| download | gcc-73f8e9dca5ff891ed19001b213fd1f6ce31417e3.zip gcc-73f8e9dca5ff891ed19001b213fd1f6ce31417e3.tar.gz gcc-73f8e9dca5ff891ed19001b213fd1f6ce31417e3.tar.bz2 | |
ubsan: Avoid -Wpadded warnings [PR94641]
-Wpadded warnings aren't really useful for the artificial types that GCC
lays out for ubsan.
2020-04-21 Jakub Jelinek <jakub@redhat.com>
PR c/94641
* stor-layout.c (place_field, finalize_record_size): Don't emit
-Wpadded warning on TYPE_ARTIFICIAL rli->t.
* ubsan.c (ubsan_get_type_descriptor_type,
ubsan_get_source_location_type, ubsan_create_data): Set
TYPE_ARTIFICIAL.
* asan.c (asan_global_struct): Likewise.
* c-c++-common/ubsan/pr94641.c: New test.
Diffstat (limited to 'gcc/stor-layout.c')
| -rw-r--r-- | gcc/stor-layout.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/gcc/stor-layout.c b/gcc/stor-layout.c index 8c9e034..bde6fa2 100644 --- a/gcc/stor-layout.c +++ b/gcc/stor-layout.c @@ -1341,7 +1341,8 @@ place_field (record_layout_info rli, tree field) Bump the cumulative size to multiple of field alignment. */ if (!targetm.ms_bitfield_layout_p (rli->t) - && DECL_SOURCE_LOCATION (field) != BUILTINS_LOCATION) + && DECL_SOURCE_LOCATION (field) != BUILTINS_LOCATION + && !TYPE_ARTIFICIAL (rli->t)) warning (OPT_Wpadded, "padding struct to align %q+D", field); /* If the alignment is still within offset_align, just align @@ -1775,7 +1776,8 @@ finalize_record_size (record_layout_info rli) if (TREE_CONSTANT (unpadded_size) && simple_cst_equal (unpadded_size, TYPE_SIZE (rli->t)) == 0 - && input_location != BUILTINS_LOCATION) + && input_location != BUILTINS_LOCATION + && !TYPE_ARTIFICIAL (rli->t)) warning (OPT_Wpadded, "padding struct size to alignment boundary"); if (warn_packed && TREE_CODE (rli->t) == RECORD_TYPE |