Re: memory pages nulling when releasing


Jason Evans napsal/wrote, On 06/20/06 19:43:
>>> BTW, Z nor J doesn't imply 'R' despite of text of manual page.

> The man page looks accurate to me.  What aspect of the descriptions of 
> 'J' and 'Z' do you think is incorrect?


	From manual page:
  =======================
J       ...
	This options also sets the ``R'' option.
	...
Z       This option implicitly sets the ``J'' and ``R'' options,
  =======================


	From libc/stdlib/malloc.c (the lines containing malloc_realloc + some 
lines around)
  =======================
static int malloc_realloc;
....
		case 'r': malloc_realloc = 0; break;
		case 'R': malloc_realloc = 1; break;
		case 'j': malloc_junk    = 0; break;
....
         if (!malloc_realloc && 			/* Unless we have to, */
	  size <= osize && 			/* .. or are too small, ...
	if (!malloc_realloc &&		/* Unless we have to, */
	  size <= osize && 		/* ..or are too small, */
  =======================

	The  malloc_realloc seems to be set on one place only - when R/r 
present. Then it is used only. I see no dependency to J nor Z

	I send no PR because I have submitted several more important PR's which 
are untouched for months. I don't want to overload committers nor PR 
database.

					Dan


-- 
Dan Lukes                                   SISAL MFF UK
AKA: dan@obluda.cz, dan@freebsd.cz,dan@kolej.mff.cuni.cz

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