This is the mail archive of the
mailing list for the glibc project.
Re: [PATCH]: Add to the stack size the TLS size before allocating
The aio thread creation already sets the thread stack size
correctly when needed (commit 232872379ee82cd040a52a48cbbae65a249b5765).
When I was creating the patch I also though about adjust the thread
stack size in 'pthread_attr_setstacksize', however GLIBC strategy using
by some Ulrich patchs was to adjust the stack size by just using the
function '__pthread_get_minstack (&attr)'. The function already takes
in consideration the static TLS size, the guardsize page, the dl_pagesize
On 03/23/2012 05:42 PM, Carlos O'Donell wrote:
> On Fri, Mar 23, 2012 at 1:44 PM, asharif tools <firstname.lastname@example.org> wrote:
>> Currently glibc subtracts from the stack size the TLS size and the
>> stack allocation can fail when the TLS is large enough. See this bug:
>> http://sourceware.org/bugzilla/show_bug.cgi?id=11787. This patch
>> addresses that:
>> When stackallocate() is called, glibc allocates a stack space of:
>> requested_size - TLS_size. The TLS_size could be anything, and in the case of
>> Chrome built with -fprofile-generate, is large enough so stack allocation fails.
>> This patch increases the stack size by the TLS_size so that stack allocation
>> doesn't fail when the TLS is larger than the request size.
>> --- ./glibc-2.11.1/nptl/allocatestack.c 2012-03-21 22:36:08.810112972 -0700
>> +++ ./glibc-2.11.1/nptl/allocatestack.c 2012-03-21 22:39:59.469273930 -0700
>> @@ -349,6 +349,10 @@
>> /* Get the stack size from the attribute if it is set. Otherwise we
>> use the default we determined at start time. */
>> size = attr->stacksize ?: __default_stacksize;
>> + size += __static_tls_size;
>> +#if TLS_TCB_AT_TP
>> + size += TLS_TCB_SIZE;
>> /* Get memory for the stack. */
>> if (__builtin_expect (attr->flags & ATTR_FLAG_STACKADDR, 0))
>> @@ -358,7 +363,7 @@
>> /* If the user also specified the size of the stack make sure it
>> is large enough. */
>> if (attr->stacksize != 0
>> - && attr->stacksize < (__static_tls_size + MINIMAL_REST_STACK))
>> + && attr->stacksize < (MINIMAL_REST_STACK))
>> return EINVAL;
>> /* Adjust stack size for alignment of the TLS block. */
>> Any feedback on this patch would be appreciated.
> I responded in the bug. Thanks for posting.
Adhemerval Zanella Netto