On Wed, 2016-06-01 at 10:19 -0700, John Reiser wrote:
> On 06/01/2016, Marshall Lochbaum wrote:
> >>From my perspective I have attempted to use Valgrind as intended, and it
> > fails to provide the single most important piece of information for
> > diagnosing a use-after-free error. I'm having diff
On 06/01/2016, Marshall Lochbaum wrote:
> Do you know whether what I want to do is possible with Valgrind, or are
> you just offering generic advice? Neither of the freelist options
> (freelist-vol and freelist-big-blocks) seem related, and indeed,
> changing them doesn't affect Valgrind's output o
Do you know whether what I want to do is possible with Valgrind, or are
you just offering generic advice? Neither of the freelist options
(freelist-vol and freelist-big-blocks) seem related, and indeed,
changing them doesn't affect Valgrind's output on either your test
program or J. I'm well aware
=recently.c
#include "valgrind/valgrind.h"
#include
#include
int main()
{
int *const m0 = malloc (1<<16);
VALGRIND_CREATE_MEMPOOL(m0, (1<<16), 0); // a new pool inside a
malloc()ed block
int *const m1 = (4368/sizeof(int)) + m0; // point into the interior of
the pool
Correct me if I've misread the code. It appears that for an address to
be in a recently re-allocated block, it must be contained in a freed
block as well as in an allocated block. How do I get Valgrind to tell me
about the freed block, like it does with malloc/free?
Marshall
On Thu, May 26, 2016
> ... The error message only indicates that the address is in one
> of the memory pools. Valgrind states that the block is "recently
> re-allocated", a term which I don't understand and which doesn't seem to
> appear in any of the documentation.
> ==4888== Address 0x5c31230 is 4,368 bytes insid
Hello,
I have been working on the memory model for J (the programming
language). J uses a fairly standard memory pool system for small
allocations, with a number of pools which are allocated once needed and
store small values.
My additions are shown here:
https://github.com/iocane/unbox/commit/62
