From: Michael Paquier <michael@paquier.xyz>
To: pgsql-committers@lists.postgresql.org
Subject: pgsql: Support loading of injection points
Date: Fri, 05 Jul 2024 09:13:28 +0000
Message-ID: <E1sPf0Q-000Ob1-Vi@gemulon.postgresql.org> (raw)
Support loading of injection points
This can be used to load an injection point and prewarm the
backend-level cache before running it, to avoid issues if the point
cannot be loaded due to restrictions in the code path where it would be
run, like a critical section where no memory allocation can happen
(load_external_function() can do allocations when expanding a library
name).
Tests can use a macro called INJECTION_POINT_LOAD() to load an injection
point. The test module injection_points gains some tests, and a SQL
function able to load an injection point.
Based on a request from Andrey Borodin, who has implemented a test for
multixacts requiring this facility.
Reviewed-by: Andrey Borodin
Discussion: https://postgr.es/m/ZkrBE1e2q2wGvsoN@paquier.xyz
Branch
------
master
Details
-------
https://git.postgresql.org/pg/commitdiff/4b211003ecc2946dc0052b650141ea4e8f35254c
Modified Files
--------------
doc/src/sgml/xfunc.sgml | 14 +++
src/backend/utils/misc/injection_point.c | 121 +++++++++++++++------
src/include/utils/injection_point.h | 3 +
.../injection_points/expected/injection_points.out | 32 ++++++
.../injection_points/injection_points--1.0.sql | 10 ++
.../modules/injection_points/injection_points.c | 17 +++
.../injection_points/sql/injection_points.sql | 7 ++
7 files changed, 168 insertions(+), 36 deletions(-)
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To: pgsql-committers@postgresql.org
Cc: michael@paquier.xyz, pgsql-committers@lists.postgresql.org
Subject: Re: pgsql: Support loading of injection points
In-Reply-To: <E1sPf0Q-000Ob1-Vi@gemulon.postgresql.org>
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