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| author | Tom Lane | 2021-02-13 22:49:08 +0000 |
|---|---|---|
| committer | Tom Lane | 2021-02-13 22:49:08 +0000 |
| commit | 22001684623bd95b4e1d5c21854f222a37b13267 (patch) | |
| tree | 3411243799fd1a12cbbb52a8cc510672e88e0cb8 /src/port | |
| parent | a28df6fa3041523f9a96cf0d3c3929f8bdc7c797 (diff) | |
pg_attribute_no_sanitize_alignment() macro
Modern gcc and clang compilers offer alignment sanitizers, which help to detect
pointer misalignment. However, our codebase already contains x86-specific
crc32 computation code, which uses unalignment access. Thankfully, those
compilers also support the attribute, which disables alignment sanitizers at
the function level. This commit adds pg_attribute_no_sanitize_alignment(),
which wraps this attribute, and applies it to pg_comp_crc32c_sse42() function.
Back-patch of commits 993bdb9f9 and ad2ad698a, to enable doing
alignment testing in all supported branches.
Discussion: https://postgr.es/m/CAPpHfdsne3%3DT%3DfMNU45PtxdhSL_J2PjLTeS8rwKnJzUR4YNd4w%40mail.gmail.com
Discussion: https://postgr.es/m/475514.1612745257%40sss.pgh.pa.us
Author: Alexander Korotkov, revised by Tom Lane
Reviewed-by: Tom Lane
Diffstat (limited to 'src/port')
| -rw-r--r-- | src/port/pg_crc32c_sse42.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/src/port/pg_crc32c_sse42.c b/src/port/pg_crc32c_sse42.c index b9def7e2ea5..fb2b54fa463 100644 --- a/src/port/pg_crc32c_sse42.c +++ b/src/port/pg_crc32c_sse42.c @@ -18,6 +18,7 @@ #include <nmmintrin.h> +pg_attribute_no_sanitize_alignment() pg_crc32c pg_comp_crc32c_sse42(pg_crc32c crc, const void *data, size_t len) { |