postgresql/src/backend/utils
Andrew Dunstan f7a605f636 Small cleanups in SQL/JSON code
These are to keep Coverity happy. In one case remove a redundant NULL
check, and in another explicitly ignore a function result that is already
known.
2022-04-15 07:49:20 -04:00
..
activity pgstat: set timestamps of fixed-numbered stats after a crash. 2022-04-14 17:40:25 -07:00
adt Small cleanups in SQL/JSON code 2022-04-15 07:49:20 -04:00
cache Remove extraneous blank lines before block-closing braces 2022-04-13 19:16:02 +02:00
error Remove extraneous blank lines before block-closing braces 2022-04-13 19:16:02 +02:00
fmgr Fix various typos and spelling mistakes in code comments 2022-04-11 20:49:41 +12:00
hash Update copyright for 2022 2022-01-07 19:04:57 -05:00
init Revert the addition of GetMaxBackends() and related stuff. 2022-04-12 14:45:23 -04:00
mb Update copyright for 2022 2022-01-07 19:04:57 -05:00
misc Remove extraneous blank lines before block-closing braces 2022-04-13 19:16:02 +02:00
mmgr Remove extraneous blank lines before block-closing braces 2022-04-13 19:16:02 +02:00
resowner Remove extraneous blank lines before block-closing braces 2022-04-13 19:16:02 +02:00
sort Remove extraneous blank lines before block-closing braces 2022-04-13 19:16:02 +02:00
time Clean up assorted failures under clang's -fsanitize=undefined checks. 2022-03-03 18:13:24 -05:00
.gitignore Rearrange makefile rules for running Gen_fmgrtab.pl. 2018-05-03 17:54:18 -04:00
errcodes.txt Update copyright for 2022 2022-01-07 19:04:57 -05:00
Gen_dummy_probes.pl Update copyright for 2022 2022-01-07 19:04:57 -05:00
Gen_dummy_probes.pl.prolog Update copyright for 2022 2022-01-07 19:04:57 -05:00
Gen_dummy_probes.sed Update copyright for 2022 2022-01-07 19:04:57 -05:00
Gen_fmgrtab.pl Update copyright for 2022 2022-01-07 19:04:57 -05:00
generate-errcodes.pl Update copyright for 2022 2022-01-07 19:04:57 -05:00
Makefile Correct Makefile dependencies for catalog scripts 2022-02-14 09:07:09 +07:00
probes.d Update copyright for 2022 2022-01-07 19:04:57 -05:00
README.Gen_dummy_probes Tweak generation of Gen_dummy_probes.pl 2021-05-11 20:02:02 -04:00

# Generating dummy probes

If Postgres isn't configured with dtrace enabled, we need to generate
dummy probes for the entries in probes.d, that do nothing.

This is accomplished in Unix via the sed script `Gen_dummy_probes.sed`. We
used to use this in MSVC builds using the perl utility `psed`, which mimicked
sed. However, that utility disappeared from Windows perl distributions and so
we converted the sed script to a perl script to be used in MSVC builds.

We still keep the sed script as the authoritative source for generating
these dummy probes because except on Windows perl is not a hard requirement
when building from a tarball.

So, if you need to change the way dummy probes are generated, first change
the sed script, and when it's working generate the perl script. This can
be accomplished by using the perl utility s2p.

s2p is no longer part of the perl core, so it might not be on your system,
but it is available on CPAN and also in many package systems. e.g.
on Fedora it can be installed using `cpan App::s2p` or
`dnf install perl-App-s2p`.

The Makefile contains a recipe for regenerating Gen_dummy_probes.pl, so all
you need to do is once you have s2p installed is `make Gen_dummy_probes.pl`
Note that in a VPATH build this will generate the file in the vpath tree,
not the source tree.