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When pgbench runs with multiple threads and verbose error reporting is enabled (--verbose-errors), multiple clients can build verbose error messages concurrently. Previously, a function-local static PQExpBuffer was used for these messages, causing the buffer to be shared across threads. This was not thread-safe and could result in corrupted or incorrect log output. Fix this by using a local PQExpBufferData instead of a static buffer. This keeps verbose error messages correct during concurrent execution. Backpatch to v15, where this issue was introduced. Author: Fujii Masao <masao.fujii@gmail.com> Reviewed-by: Michael Paquier <michael@paquier.xyz> Reviewed-by: Alex Guo <guo.alex.hengchen@gmail.com> Reviewed-by: Chao Li <li.evan.chao@gmail.com> Discussion: https://postgr.es/m/CAHGQGwER1AjGXpkKB9t9820NBhMQ_Ghv7=HsKeodUr3=SZsF4g@mail.gmail.com Backpatch-through: 15 |
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