It seems that on ia64, the function pthread_create does not use the value of
pthread_attr_setstacksize for the stack size, but something like the half of
it. The reproducer attached tries to fill the stack according to its supposed
size, and show that we are actually able to fill only half of it before getting
a segv.
gcc -g bug.c -o bug
gdb bug
(gdb) run 2000000 1900000
you should get something like:
7 arr [i] = 0xdeadbeef;
(gdb) print i * sizeof (int)
$2 = 904028
So, although the given size of the stack is supposed to be something around
2Megs, there is less than 1Meg of stack where we can actually write.
--
Summary: pthread_attr_setstacksize does not set the proper size
Product: gcc
Version: 3.4.6
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: ochem at gnat dot com
GCC host triplet: ia64-sgi-linux-gnu, ia64-hp-hpux11.23, ia64-hp-linux-gnu
GCC target triplet: ia64-sgi-linux-gnu, ia64-hp-hpux11.23, ia64-hp-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25533
