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-rw-r--r--nptl/pthread_create.c109
1 files changed, 97 insertions, 12 deletions
diff --git a/nptl/pthread_create.c b/nptl/pthread_create.c
index bf41e9fcc9..79729ced03 100644
--- a/nptl/pthread_create.c
+++ b/nptl/pthread_create.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
+/* Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
@@ -52,7 +52,7 @@ unsigned int __nptl_nthreads = 1;
#include "allocatestack.c"
/* Code to create the thread. */
-#include "createthread.c"
+#include <createthread.c>
struct pthread *
@@ -206,6 +206,15 @@ __free_tcb (struct pthread *pd)
running thread is gone. */
abort ();
+ /* Free TPP data. */
+ if (__builtin_expect (pd->tpp != NULL, 0))
+ {
+ struct priority_protection_data *tpp = pd->tpp;
+
+ pd->tpp = NULL;
+ free (tpp);
+ }
+
/* Queue the stack memory block for reuse and exit the process. The
kernel will signal via writing to the address returned by
QUEUE-STACK when the stack is available. */
@@ -229,6 +238,32 @@ start_thread (void *arg)
/* Initialize resolver state pointer. */
__resp = &pd->res;
+#ifdef __NR_set_robust_list
+# ifndef __ASSUME_SET_ROBUST_LIST
+ if (__set_robust_list_avail >= 0)
+# endif
+ {
+ INTERNAL_SYSCALL_DECL (err);
+ /* This call should never fail because the initial call in init.c
+ succeeded. */
+ INTERNAL_SYSCALL (set_robust_list, err, 2, &pd->robust_head,
+ sizeof (struct robust_list_head));
+ }
+#endif
+
+ /* If the parent was running cancellation handlers while creating
+ the thread the new thread inherited the signal mask. Reset the
+ cancellation signal mask. */
+ if (__builtin_expect (pd->parent_cancelhandling & CANCELING_BITMASK, 0))
+ {
+ INTERNAL_SYSCALL_DECL (err);
+ sigset_t mask;
+ __sigemptyset (&mask);
+ __sigaddset (&mask, SIGCANCEL);
+ (void) INTERNAL_SYSCALL (rt_sigprocmask, err, 4, SIG_UNBLOCK, &mask,
+ NULL, _NSIG / 8);
+ }
+
/* This is where the try/finally block should be created. For
compilers without that support we do use setjmp. */
struct pthread_unwind_buf unwind_buf;
@@ -310,10 +345,52 @@ start_thread (void *arg)
the breakpoint reports TD_THR_RUN state rather than TD_THR_ZOMBIE. */
atomic_bit_set (&pd->cancelhandling, EXITING_BIT);
+#ifndef __ASSUME_SET_ROBUST_LIST
+ /* If this thread has any robust mutexes locked, handle them now. */
+# if __WORDSIZE == 64
+ void *robust = pd->robust_head.list;
+# else
+ __pthread_slist_t *robust = pd->robust_list.__next;
+# endif
+ /* We let the kernel do the notification if it is able to do so.
+ If we have to do it here there for sure are no PI mutexes involved
+ since the kernel support for them is even more recent. */
+ if (__set_robust_list_avail < 0
+ && __builtin_expect (robust != (void *) &pd->robust_head, 0))
+ {
+ do
+ {
+ struct __pthread_mutex_s *this = (struct __pthread_mutex_s *)
+ ((char *) robust - offsetof (struct __pthread_mutex_s,
+ __list.__next));
+ robust = *((void **) robust);
+
+# ifdef __PTHREAD_MUTEX_HAVE_PREV
+ this->__list.__prev = NULL;
+# endif
+ this->__list.__next = NULL;
+
+ lll_robust_mutex_dead (this->__lock);
+ }
+ while (robust != (void *) &pd->robust_head);
+ }
+#endif
+
/* If the thread is detached free the TCB. */
if (IS_DETACHED (pd))
/* Free the TCB. */
__free_tcb (pd);
+ else if (__builtin_expect (pd->cancelhandling & SETXID_BITMASK, 0))
+ {
+ /* Some other thread might call any of the setXid functions and expect
+ us to reply. In this case wait until we did that. */
+ do
+ lll_futex_wait (&pd->setxid_futex, 0);
+ while (pd->cancelhandling & SETXID_BITMASK);
+
+ /* Reset the value so that the stack can be reused. */
+ pd->setxid_futex = 0;
+ }
/* We cannot call '_exit' here. '_exit' will terminate the process.
@@ -347,17 +424,15 @@ __pthread_create_2_1 (newthread, attr, start_routine, arg)
void *arg;
{
STACK_VARIABLES;
- const struct pthread_attr *iattr;
- struct pthread *pd;
- int err;
- iattr = (struct pthread_attr *) attr;
+ const struct pthread_attr *iattr = (struct pthread_attr *) attr;
if (iattr == NULL)
/* Is this the best idea? On NUMA machines this could mean
accessing far-away memory. */
iattr = &default_attr;
- err = ALLOCATE_STACK (iattr, &pd);
+ struct pthread *pd = NULL;
+ int err = ALLOCATE_STACK (iattr, &pd);
if (__builtin_expect (err != 0, 0))
/* Something went wrong. Maybe a parameter of the attributes is
invalid or we could not allocate memory. */
@@ -401,19 +476,29 @@ __pthread_create_2_1 (newthread, attr, start_routine, arg)
pd->schedpolicy = self->schedpolicy;
pd->schedparam = self->schedparam;
+ /* Copy the stack guard canary. */
+#ifdef THREAD_COPY_STACK_GUARD
+ THREAD_COPY_STACK_GUARD (pd);
+#endif
+
+ /* Copy the pointer guard value. */
+#ifdef THREAD_COPY_POINTER_GUARD
+ THREAD_COPY_POINTER_GUARD (pd);
+#endif
+
/* Determine scheduling parameters for the thread. */
if (attr != NULL
&& __builtin_expect ((iattr->flags & ATTR_FLAG_NOTINHERITSCHED) != 0, 0)
&& (iattr->flags & (ATTR_FLAG_SCHED_SET | ATTR_FLAG_POLICY_SET)) != 0)
{
- INTERNAL_SYSCALL_DECL (err);
+ INTERNAL_SYSCALL_DECL (scerr);
/* Use the scheduling parameters the user provided. */
if (iattr->flags & ATTR_FLAG_POLICY_SET)
pd->schedpolicy = iattr->schedpolicy;
else if ((pd->flags & ATTR_FLAG_POLICY_SET) == 0)
{
- pd->schedpolicy = INTERNAL_SYSCALL (sched_getscheduler, err, 1, 0);
+ pd->schedpolicy = INTERNAL_SYSCALL (sched_getscheduler, scerr, 1, 0);
pd->flags |= ATTR_FLAG_POLICY_SET;
}
@@ -422,14 +507,14 @@ __pthread_create_2_1 (newthread, attr, start_routine, arg)
sizeof (struct sched_param));
else if ((pd->flags & ATTR_FLAG_SCHED_SET) == 0)
{
- INTERNAL_SYSCALL (sched_getparam, err, 2, 0, &pd->schedparam);
+ INTERNAL_SYSCALL (sched_getparam, scerr, 2, 0, &pd->schedparam);
pd->flags |= ATTR_FLAG_SCHED_SET;
}
/* Check for valid priorities. */
- int minprio = INTERNAL_SYSCALL (sched_get_priority_min, err, 1,
+ int minprio = INTERNAL_SYSCALL (sched_get_priority_min, scerr, 1,
iattr->schedpolicy);
- int maxprio = INTERNAL_SYSCALL (sched_get_priority_max, err, 1,
+ int maxprio = INTERNAL_SYSCALL (sched_get_priority_max, scerr, 1,
iattr->schedpolicy);
if (pd->schedparam.sched_priority < minprio
|| pd->schedparam.sched_priority > maxprio)
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-17 20:51:14 +0000