[#CORE-1983] Out of memory condition in OS causes AV

Firebird Core

Out of memory condition in OS causes AV

Created: 08/Jul/08 03:53 AM Updated: 26/Jan/09 09:23 AM

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Component/s:

Engine

Affects Version/s:

2.0.0, 2.0.1, 2.1 Alpha 1, 2.1 Beta 1, 2.0.2, 2.0.3, 2.1 Beta 2, 2.1 RC1, 2.5 Initial, 2.1 RC2, 2.1.0, 2.0.4, 2.5 Alpha 1, 2.1.1

Fix Version/s:

2.0.5, 2.1.2, 2.5 Beta 1

Time Tracking:

Not Specified

Environment:

All posix except Solaris

Target:	2.5 Beta 1, 2.1.2 and 2.0.5
Planning Status:	Unspecified

Description

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mmap() call returns MAP_FAILED (-1) in case of any error, including out of memory condition.
In alloc.cpp:external_alloc() value, returned by MMAP, is returned directly (except Solaris), no matter of the fact that caller expects NULL in case of allocation error, not -1. Therefore (void*)(-1) is used as a normally allocated memory block, definitely causing segfault at the moment of first use.

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