From:	John Carter <ECE AT dwaf-hri DOT pwv DOT gov DOT za>
Organization:	Dpt Water Affairs & Forestry (IWQS)
To:	djgpp AT sun DOT soe DOT clarkson DOT edu
Date:	Mon, 12 Jun 1995 15:01:19 +0200
Subject:	malloc without malice

Greetings all.

I am getting a segmentation fault in malloc().

I tried to trace the fault by looking at the source code, but found
alas two source code files. One of them in /libsrc/c/lib/malloc.c
(date 28 Aug 1994 by Chris Kingsley) and the other in
src/libgplus.262/libgplus/src/malloc.c. (date 14 Aug 1993 V2.5 by 
Doug Lea)

Looking at the linker map indicates I'm linking to malloc in malloc.o
in libc.a.

Using 'nm --extern --demangle' on every lib*.a in the lib directory 
informs me that the libc.a and libc_p.a are the only places where 
malloc is defined.

Notes :-
  1) I'm using DJGPP V1.12m4
  2) I'm programming in C++ mixed with bits of C generated by BISON 
     and FLEX.
  3) The src/libgplus.262/libgplus/src/malloc.c version is at least 
     heavily  commented.
  4) I still have many megabytes more real & virtual memory to go 
     before I run out of heap.


Question 1)
    Any idea what is causing the fault?

Question 2)
    Which is the best malloc? (And how do I convince it to link in?)


PS: Much thanks to DJ, FSF & Co. Great software this!

John Carter
Institute for Water Quality Studies. Department of Water Affairs.
Internet : ece AT dwaf-hri DOT pwv DOT gov DOT za
Phone    : 27-12-808-0374x194      Fax : 27-12-808-0338

I voted KISS in the election. Therefore it is highly unlikely (1:3000)
that my views represent those of anyone else, let alone my employer.

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