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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2021-02-13 17:49:08 -0500 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2021-02-13 17:49:08 -0500 |
| commit | c86eae39ce1e5f842bbf75e381d903de43ad4c80 (patch) | |
| tree | 9763fd42220efe82448da72690358ffd555bf28e /src/backend/executor/execUtils.c | |
| parent | bcd5e95754bff330151dacbf7db5140d01aabe3a (diff) | |
| download | postgresql-c86eae39ce1e5f842bbf75e381d903de43ad4c80.tar.gz postgresql-c86eae39ce1e5f842bbf75e381d903de43ad4c80.zip | |
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/backend/executor/execUtils.c')
0 files changed, 0 insertions, 0 deletions