> - Memory leak! We're loosing memory, apparently when moving from one scene
> to another. Lots of it, too (maybe it's just pic_buffer_size != 0 being
> interpreted as "infinite", but I don't think so).
>
> Reliably finding the memory leak(s) will require slighly modified versions
> of malloc() and friends, unless somebody already has a good tool for that.
Quaoting from the malloc man page:
Recent versions of Linux libc (later than 5.4.23) and GNU
libc (2.x) include a malloc implementation which is tun
able via environment variables. When MALLOC_CHECK_ is
set, a special (less efficient) implementation is used
which is designed to be tolerant against simple errors,
such as double calls of free() with the same argument, or
overruns of a single byte (off-by-one bugs). Not all such
errors can be proteced against, however, and memory leaks
can result. If MALLOC_CHECK_ is set to 0, any detected
heap corruption is silently ignored; if set to 1, a diag
nostic is printed on stderr; if set to 2, abort() is
called immediately. This can be useful because otherwise
a crash may happen much later, and the true cause for the
problem is then very hard to track down.
Also, check out electric fence (written by bruce perens). It comes standard
on most linux distros. Man efence (or libefence, sometmes the man page is
called that, too) for more info on efence. Basically it puts
write-protected areas around all malloced memory areas so that your program
terminates the moment that you try to write beyond the memory in that chunk.
Is that the sort of stuff that you were looking for, or did I misunderstand?
-Chris
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