0f2458ff5f
Revise aset.c so that all the "private" fields of chunk headers are marked NOACCESS when outside the module, improving on the previous coding which protected only requested_size. Fix a couple of corner case bugs, such as failing to re-protect the header during a failure exit from AllocSetRealloc, and wrong padding-size calculation for an oversize allocation request. Apply the same design to generation.c, and also fix several bugs therein that I found by dint of hacking the code to use generation.c as the standard allocator and then running the core regression tests with it. Notably, we have to track the actual size of each block, else the wipe_mem call in GenerationReset clears the wrong amount of memory for an oversize-chunk block; and GenerationCheck needs a way of identifying freed chunks that isn't fooled by palloc(0). I chose to fix the latter by resetting the context pointer to NULL in a freed chunk, roughly like what happens in a freed aset.c chunk. Discussion: https://postgr.es/m/E1eHa4J-0006hI-Q8@gemulon.postgresql.org |
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| contrib | ||
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| src | ||
| .dir-locals.el | ||
| .gitattributes | ||
| .gitignore | ||
| COPYRIGHT | ||
| GNUmakefile.in | ||
| HISTORY | ||
| Makefile | ||
| README | ||
| README.git | ||
| aclocal.m4 | ||
| configure | ||
| configure.in | ||
README
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: https://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 https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.