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Remove redundant null pointer checks before free()

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Per applicable standards, free() with a null pointer is a no-op.
Systems that don't observe that are ancient and no longer relevant.
Some PostgreSQL code already required this behavior, so this change
does not introduce any new requirements, just makes the code more
consistent.

Discussion: https://www.postgresql.org/message-id/flat/dac5d2d0-98f5-94d9-8e69-46da2413593d%40enterprisedb.com
This commit is contained in:
Peter Eisentraut
2022-06-16 21:50:56 +02:00
parent 098c703d30
commit 02c408e21a
38 changed files with 213 additions and 435 deletions
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12
contrib/pg_stat_statements/pg_stat_statements.c
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@ -809,8 +809,7 @@ error:
(errcode_for_file_access(),
errmsg("could not write file \"%s\": %m",
PGSS_DUMP_FILE ".tmp")));
if (qbuffer)
free(qbuffer);
free(qbuffer);
if (file)
FreeFile(file);
unlink(PGSS_DUMP_FILE ".tmp");
@ -1657,8 +1656,7 @@ pg_stat_statements_internal(FunctionCallInfo fcinfo,
pgss->extent != extent ||
pgss->gc_count != gc_count)
{
if (qbuffer)
free(qbuffer);
free(qbuffer);
qbuffer = qtext_load_file(&qbuffer_size);
}
}
@ -1842,8 +1840,7 @@ pg_stat_statements_internal(FunctionCallInfo fcinfo,
LWLockRelease(pgss->lock);
if (qbuffer)
free(qbuffer);
free(qbuffer);
}
/* Number of output arguments (columns) for pg_stat_statements_info */
@ -2446,8 +2443,7 @@ gc_fail:
/* clean up resources */
if (qfile)
FreeFile(qfile);
if (qbuffer)
free(qbuffer);
free(qbuffer);
/*
* Since the contents of the external file are now uncertain, mark all