niansa-misc/glibc
1
0
Fork 0
mirror of git://sourceware.org/git/glibc.git synced 2025-03-06 20:58:33 +01:00
Code Issues Projects Releases Packages Wiki Activity

htl: Fix stack information for main thread

Browse source 
We can easily directly ask the kernel with vm_region rather than
assuming a one-page stack.
This commit is contained in:
Samuel Thibault 2023-09-03 21:11:09 +02:00
parent 89ade8d8cb
commit 8076906109
1 changed files with 27 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

30
sysdeps/mach/hurd/htl/pt-sysdep.c
View file

@ -60,12 +60,36 @@ _init_routine (void *stack)
if (stack != NULL)
{
/* We are getting initialized due to dlopening a library using libpthread
while the main program was not linked against libpthread. */
/* We are given a stack, use it. */
/* Get the stack area information */
vm_address_t addr = (vm_address_t) stack;
vm_size_t vm_size;
vm_prot_t prot, max_prot;
vm_inherit_t inherit;
boolean_t is_shared;
memory_object_name_t obj;
vm_offset_t offset;
if (vm_region (__mach_task_self (), &addr,
&vm_size, &prot, &max_prot, &inherit, &is_shared,
&obj, &offset) == KERN_SUCCESS)
__mach_port_deallocate (__mach_task_self (), obj);
else
{
/* Uh. Assume at least a page. */
vm_size = __vm_page_size;
#if _STACK_GROWS_DOWN
addr = (vm_address_t) stack - vm_size;
#else
addr = (vm_address_t) stack + vm_size;
#endif
}
/* Avoid allocating another stack */
attrp = &attr;
__pthread_attr_init (attrp);
__pthread_attr_setstack (attrp, stack, __vm_page_size);
__pthread_attr_setstack (attrp, (void *) addr, vm_size);
}
/* Create the pthread structure for the main thread (i.e. us). */