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From: eay@surf.sics.bu.oz.au (Eric the Young)
Newsgroups: comp.lang.perl
Subject: Re: lib.big: Bad free() ignored...
Message-ID: <1382@surf.sics.bu.oz.au>
Date: 13 Nov 90 23:52:05 GMT
Reply-To: eay@surf.sics.bu.oz.au (Eric the Young)
Organization: SICS, Bond University, Australia.
Lines: 24

In article <1990Nov13.051155.13407@uokmax.ecn.uoknor.edu>, randy@uokmax.ecn.uoknor.edu (Longshot) writes:

|> lib.big.........Bad free() ignored at (eval) line 1, <DATA> line 56.
|> FAILED on test 51
|> Failed 1 test.

I had lib.big test 51 fail with a core dump on my decstation 3100 ultrix 4.0
(no optimization/volatile) and fail on our microvax 3600 ultrix 3.0.

The error on the decstation was a uualigned memory access in the free()
when using the system malloc.

Test 58 failed instead when using the perl malloc.  The error being an
unaligned data access in malloc.

I recompiled perl using some debugging malloc routines (posted to the
net a few months ago) and they produce a large number of
Warning: free(): Data has overre some-one is doing some random writes :-(.
eric

-- 
Eric Young
System Programmer, SICS Bond Uni.
ACSnet: eay@surf.sics.bu.oz.au