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postgresql/meson_options.txt
Michael Paquier d86d20f0ba Add backend support for injection points 
Injection points are a new facility that makes possible for developers
to run custom code in pre-defined code paths.  Its goal is to provide
ways to design and run advanced tests, for cases like:
- Race conditions, where processes need to do actions in a controlled
ordered manner.
- Forcing a state, like an ERROR, FATAL or even PANIC for OOM, to force
recovery, etc.
- Arbitrary sleeps.

This implements some basics, and there are plans to extend it more in
the future depending on what's required.  Hence, this commit adds a set
of routines in the backend that allows developers to attach, detach and
run injection points:
- A code path calling an injection point can be declared with the macro
INJECTION_POINT(name).
- InjectionPointAttach() and InjectionPointDetach() to respectively
attach and detach a callback to/from an injection point.  An injection
point name is registered in a shmem hash table with a library name and a
function name, which will be used to load the callback attached to an
injection point when its code path is run.

Injection point names are just strings, so as an injection point can be
declared and run by out-of-core extensions and modules, with callbacks
defined in external libraries.

This facility is hidden behind a dedicated switch for ./configure and
meson, disabled by default.

Note that backends use a local cache to store callbacks already loaded,
cleaning up their cache if a callback has found to be removed on a
best-effort basis.  This could be refined further but any tests but what
we have here was fine with the tests I've written while implementing
these backend APIs.

Author: Michael Paquier, with doc suggestions from Ashutosh Bapat.
Reviewed-by: Ashutosh Bapat, Nathan Bossart, Álvaro Herrera, Dilip
Kumar, Amul Sul, Nazir Bilal Yavuz
Discussion: https://postgr.es/m/ZTiV8tn_MIb_H2rE@paquier.xyz
2024-01-22 10:15:50 +09:00

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# Copyright (c) 2022-2024, PostgreSQL Global Development Group
# Data layout influencing options
option('blocksize', type: 'combo',
choices: ['1', '2', '4', '8', '16', '32'],
value: '8',
description: 'Relation block size, in kilobytes')
option('wal_blocksize', type: 'combo',
choices: ['1', '2', '4', '8', '16', '32', '64'],
value: '8',
description: 'WAL block size, in kilobytes')
option('segsize', type: 'integer', value: 1,
description: 'Segment size, in gigabytes')
option('segsize_blocks', type: 'integer', value: 0,
description: 'Segment size, in blocks')
# Miscellaneous options
option('krb_srvnam', type: 'string', value: 'postgres',
description: 'Default Kerberos service principal for GSSAPI')
option('system_tzdata', type: 'string', value: '',
description: 'Use system time zone data in specified directory')
# Defaults
option('pgport', type: 'integer', value: 5432,
min: 1, max: 65535,
description: 'Default port number for server and clients')
# Developer options
option('cassert', type: 'boolean', value: false,
description: 'Enable assertion checks (for debugging)')
option('tap_tests', type: 'feature', value: 'auto',
description: 'Enable TAP tests')
option('injection_points', type: 'boolean', value: false,
description: 'Enable injection points')
option('PG_TEST_EXTRA', type: 'string', value: '',
description: 'Enable selected extra tests')
option('atomics', type: 'boolean', value: true,
description: 'Use atomic operations')
option('spinlocks', type: 'boolean', value: true,
description: 'Use spinlocks')
# Compilation options
option('extra_include_dirs', type: 'array', value: [],
description: 'Non-default directories to be searched for headers')
option('extra_lib_dirs', type: 'array', value: [],
description: 'Non-default directories to be searched for libs')
option('extra_version', type: 'string', value: '',
description: 'Append STRING to the PostgreSQL version number')
option('darwin_sysroot', type: 'string', value: '',
description: 'Select a non-default sysroot path')
option('rpath', type: 'boolean', value: true,
description: 'Embed shared library search path in executables')
# External dependencies
option('bonjour', type: 'feature', value: 'auto',
description: 'Bonjour support')
option('bsd_auth', type: 'feature', value: 'auto',
description: 'BSD Authentication support')
option('docs', type: 'feature', value: 'auto',
description: 'Documentation in HTML and man page format')
option('docs_pdf', type: 'feature', value: 'auto',
description: 'Documentation in PDF format')
option('docs_html_style', type: 'combo', choices: ['simple', 'website'],
description: 'CSS stylesheet for HTML documentation')
option('dtrace', type: 'feature', value: 'disabled',
description: 'DTrace support')
option('gssapi', type: 'feature', value: 'auto',
description: 'GSSAPI support')
option('icu', type: 'feature', value: 'auto',
description: 'ICU support')
option('ldap', type: 'feature', value: 'auto',
description: 'LDAP support')
option('libedit_preferred', type: 'boolean', value: false,
description: 'Prefer BSD Libedit over GNU Readline')
option('libxml', type: 'feature', value: 'auto',
description: 'XML support')
option('libxslt', type: 'feature', value: 'auto',
description: 'XSLT support in contrib/xml2')
option('llvm', type: 'feature', value: 'disabled',
description: 'LLVM support')
option('lz4', type: 'feature', value: 'auto',
description: 'LZ4 support')
option('nls', type: 'feature', value: 'auto',
description: 'Native language support')
option('pam', type: 'feature', value: 'auto',
description: 'PAM support')
option('plperl', type: 'feature', value: 'auto',
description: 'Build Perl modules (PL/Perl)')
option('plpython', type: 'feature', value: 'auto',
description: 'Build Python modules (PL/Python)')
option('pltcl', type: 'feature', value: 'auto',
description: 'Build with Tcl support (PL/Tcl)')
option('tcl_version', type: 'string', value: 'tcl',
description: 'Tcl version')
option('readline', type: 'feature', value: 'auto',
description: 'Use GNU Readline or BSD Libedit for editing')
option('selinux', type: 'feature', value: 'auto',
description: 'SELinux support')
option('ssl', type: 'combo', choices: ['auto', 'none', 'openssl'],
value: 'auto',
description: 'Use LIB for SSL/TLS support (openssl)')
option('systemd', type: 'feature', value: 'auto',
description: 'systemd support')
option('uuid', type: 'combo', choices: ['none', 'bsd', 'e2fs', 'ossp'],
value: 'none',
description: 'Use LIB for contrib/uuid-ossp support')
option('zlib', type: 'feature', value: 'auto',
description: 'Enable zlib')
option('zstd', type: 'feature', value: 'auto',
description: 'Enable zstd')
# Programs
option('BISON', type: 'array', value: ['bison', 'win_bison'],
description: 'Path to bison binary')
option('DTRACE', type: 'string', value: 'dtrace',
description: 'Path to dtrace binary')
option('FLEX', type: 'array', value: ['flex', 'win_flex'],
description: 'Path to flex binary')
option('FOP', type: 'string', value: 'fop',
description: 'Path to fop binary')
option('GZIP', type: 'string', value: 'gzip',
description: 'Path to gzip binary')
option('LZ4', type: 'string', value: 'lz4',
description: 'Path to lz4 binary')
option('OPENSSL', type: 'string', value: 'openssl',
description: 'Path to openssl binary')
option('PERL', type: 'string', value: 'perl',
description: 'Path to perl binary')
option('PROVE', type: 'string', value: 'prove',
description: 'Path to prove binary')
option('PYTHON', type: 'array', value: ['python3', 'python'],
description: 'Path to python binary')
option('SED', type: 'string', value: 'gsed',
description: 'Path to sed binary')
option('STRIP', type: 'string', value: 'strip',
description: 'Path to strip binary, used for PGXS emulation')
option('TAR', type: 'string', value: 'tar',
description: 'Path to tar binary')
option('XMLLINT', type: 'string', value: 'xmllint',
description: 'Path to xmllint binary')
option('XSLTPROC', type: 'string', value: 'xsltproc',
description: 'Path to xsltproc binary')
option('ZSTD', type: 'string', value: 'zstd',
description: 'Path to zstd binary')
option('ZIC', type: 'string', value: 'zic',
description: 'Path to zic binary, when cross-compiling')
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