Re: Code questions (strings and other things)

[Ethan M. <merritt@u.washington.edu>]

> 
> In what sense do you mean the memory use code dies dramatically?

If you enable CHECK_HEAP_USE, then gnuplot redefines  free()
to be an internal function 
	# define free(x) checked_free(x)

gp_alloc() allocates extra space and puts a checksum in the allocated
chunk of memory, which is checked when it is freed.
If the chuck was allocated directly with malloc() rather than gp_alloc()
then it doesn't contain this padding, and the attempt to validate this
"extra" space in the allocated chunk produces a segfault.

> PS:  Why isn't gpfree, gp_free; consistent with gp_alloc, etc.?

I wondered that as well.


-- 
Ethan A Merritt       merritt@u.washington.edu
Biomolecular Structure Center
Mailstop 357742
University of Washington, Seattle, WA 98195