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Add some debug support code to try to catch future mistakes in the area of

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input functions that include garbage bytes in their results.  Provide a
compile-time option RANDOMIZE_ALLOCATED_MEMORY to make palloc fill returned
blocks with variable contents.  This option also makes the parser perform
conversions of literal constants twice and compare the results, emitting a
WARNING if they don't match.  (This is the code I used to catch the input
function bugs fixed in the previous commit.)  For the moment, I've set it
to be activated automatically by --enable-cassert.
This commit is contained in:
Tom Lane
2008-04-11 22:54:23 +00:00
parent c846f7ca8a
commit 65c3d05e18
3 changed files with 98 additions and 14 deletions
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19
src/include/pg_config_manual.h
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@@ -6,7 +6,7 @@
* for developers. If you edit any of these, be sure to do a *full*
* rebuild (and an initdb if noted).
*
* $PostgreSQL: pgsql/src/include/pg_config_manual.h,v 1.30 2008/03/27 03:57:34 tgl Exp $
* $PostgreSQL: pgsql/src/include/pg_config_manual.h,v 1.31 2008/04/11 22:54:23 tgl Exp $
*------------------------------------------------------------------------
*/
@@ -214,11 +214,19 @@
*------------------------------------------------------------------------
*/
/*
* Define this to cause palloc()'d memory to be filled with random data, to
* facilitate catching code that depends on the contents of uninitialized
* memory. Right now, this gets defined automatically if --enable-cassert.
*/
#ifdef USE_ASSERT_CHECKING
#define RANDOMIZE_ALLOCATED_MEMORY
#endif
/*
* Define this to cause pfree()'d memory to be cleared immediately, to
* facilitate catching bugs that refer to already-freed values. XXX
* Right now, this gets defined automatically if --enable-cassert. In
* the long term it probably doesn't need to be on by default.
* facilitate catching bugs that refer to already-freed values.
* Right now, this gets defined automatically if --enable-cassert.
*/
#ifdef USE_ASSERT_CHECKING
#define CLOBBER_FREED_MEMORY
@@ -227,8 +235,7 @@
/*
* Define this to check memory allocation errors (scribbling on more
* bytes than were allocated). Right now, this gets defined
* automatically if --enable-cassert. In the long term it probably
* doesn't need to be on by default.
* automatically if --enable-cassert.
*/
#ifdef USE_ASSERT_CHECKING
#define MEMORY_CONTEXT_CHECKING