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Remove surplus mmap() call for stack guard page in init_private, it is done

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in init_main_thread. Also don't initialize lock and lockuser again for initial
thread, it is already done by _thr_alloc().

Reviewed by: deischen
Approved by: re (scottl)
This commit is contained in:
David Xu 2003-11-29 14:10:02 +00:00
parent 2d5d22656d
commit 5a8fe60d7e
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=123047
2 changed files with 0 additions and 50 deletions
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25
lib/libkse/thread/thr_init.c
View File

@ -319,8 +319,6 @@ _libpthread_init(struct pthread *curthread)
static void
init_main_thread(struct pthread *thread)
{
int i;
/* Setup the thread attributes. */
thread->attr = _pthread_attr_default;
thread->attr.flags |= PTHREAD_SCOPE_SYSTEM;
@ -383,15 +381,6 @@ init_main_thread(struct pthread *thread)
/* Initialize the mutex queue: */
TAILQ_INIT(&thread->mutexq);
/* Initialize thread locking. */
if (_lock_init(&thread->lock, LCK_ADAPTIVE,
_thr_lock_wait, _thr_lock_wakeup) != 0)
PANIC("Cannot initialize initial thread lock");
for (i = 0; i < MAX_THR_LOCKLEVEL; i++) {
_lockuser_init(&thread->lockusers[i], (void *)thread);
_LCK_SET_PRIVATE2(&thread->lockusers[i], (void *)thread);
}
/* Initialize hooks in the thread structure: */
thread->specific = NULL;
thread->cleanup = NULL;
@ -420,20 +409,6 @@ init_private(void)
len = sizeof (_usrstack);
if (sysctl(mib, 2, &_usrstack, &len, NULL, 0) == -1)
PANIC("Cannot get kern.usrstack from sysctl");
/*
* Create a red zone below the main stack. All other
* stacks are constrained to a maximum size by the
* parameters passed to mmap(), but this stack is only
* limited by resource limits, so this stack needs an
* explicitly mapped red zone to protect the thread stack
* that is just beyond.
*/
if (mmap((void *)_usrstack - THR_STACK_INITIAL -
_thr_guard_default, _thr_guard_default,
0, MAP_ANON, -1, 0) == MAP_FAILED)
PANIC("Cannot allocate red zone for initial thread");
/* Get the kernel clockrate: */
mib[0] = CTL_KERN;
mib[1] = KERN_CLOCKRATE;

25
lib/libpthread/thread/thr_init.c
View File

@ -319,8 +319,6 @@ _libpthread_init(struct pthread *curthread)
static void
init_main_thread(struct pthread *thread)
{
int i;
/* Setup the thread attributes. */
thread->attr = _pthread_attr_default;
thread->attr.flags |= PTHREAD_SCOPE_SYSTEM;
@ -383,15 +381,6 @@ init_main_thread(struct pthread *thread)
/* Initialize the mutex queue: */
TAILQ_INIT(&thread->mutexq);
/* Initialize thread locking. */
if (_lock_init(&thread->lock, LCK_ADAPTIVE,
_thr_lock_wait, _thr_lock_wakeup) != 0)
PANIC("Cannot initialize initial thread lock");
for (i = 0; i < MAX_THR_LOCKLEVEL; i++) {
_lockuser_init(&thread->lockusers[i], (void *)thread);
_LCK_SET_PRIVATE2(&thread->lockusers[i], (void *)thread);
}
/* Initialize hooks in the thread structure: */
thread->specific = NULL;
thread->cleanup = NULL;
@ -420,20 +409,6 @@ init_private(void)
len = sizeof (_usrstack);
if (sysctl(mib, 2, &_usrstack, &len, NULL, 0) == -1)
PANIC("Cannot get kern.usrstack from sysctl");
/*
* Create a red zone below the main stack. All other
* stacks are constrained to a maximum size by the
* parameters passed to mmap(), but this stack is only
* limited by resource limits, so this stack needs an
* explicitly mapped red zone to protect the thread stack
* that is just beyond.
*/
if (mmap((void *)_usrstack - THR_STACK_INITIAL -
_thr_guard_default, _thr_guard_default,
0, MAP_ANON, -1, 0) == MAP_FAILED)
PANIC("Cannot allocate red zone for initial thread");
/* Get the kernel clockrate: */
mib[0] = CTL_KERN;
mib[1] = KERN_CLOCKRATE;