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redirecting libxml's allocations into a Postgres context. Instead, just let it use malloc directly, and add PG_TRY blocks as needed to be sure we release libxml data structures in error recovery code paths. This is ugly but seems much more likely to play nicely with third-party uses of libxml, as seen in recent trouble reports about using Perl XML facilities in pl/perl and bug #4774 about contrib/xml2. I left the code for allocation redirection in place, but it's only built/used if you #define USE_LIBXMLCONTEXT. This is because I found it useful to corral libxml's allocations in a palloc context when hunting for libxml memory leaks, and we're surely going to have more of those in the future with this type of approach. But we don't want it turned on in a normal build because it breaks exactly what we need to fix. I have not re-indented most of the code sections that are now wrapped by PG_TRY(); that's for ease of review. pg_indent will fix it. This is a pre-existing bug in 8.3, but I don't dare back-patch this change until it's gotten a reasonable amount of field testing. |
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PostgreSQL Database Management System ===================================== This directory contains the source code distribution of the PostgreSQL database management system. PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings. PostgreSQL has many language interfaces, many of which are listed here: http://www.postgresql.org/download See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Changes between all PostgreSQL releases are recorded in the file HISTORY. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions. The latest version of this software may be obtained at http://www.postgresql.org/download/. For more information look at our web site located at http://www.postgresql.org/.