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The "callargs" variable is modified within PG_TRY and then referenced within PG_CATCH, which is exactly the coding pattern we've now found to be unsafe. Marking "callargs" volatile would be problematic because it is passed by reference to some Tcl functions, so fix the problem by not modifying it within PG_TRY. We can just postpone the free() till we exit the PG_TRY construct, as is already done elsewhere in this same file. Also, fix failure to free(callargs) when exiting on too-many-arguments error. This is only a minor memory leak, but a leak nonetheless. In passing, remove some unnecessary "volatile" markings in the same function. Those doubtless are there because gcc 2.95.3 whinged about them, but we now know that its algorithm for complaining is many bricks shy of a load. This is certainly a live bug with compilers that optimize similarly to current gcc, so back-patch to all active branches. |
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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. 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/.