2.5-18.1

1 files changed, 80 insertions, 23 deletions

diff --git a/nptl/init.c b/nptl/init.c
index 3751e6b..7144abd 100644
--- a/nptl/init.c
+++ b/nptl/init.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
+/* Copyright (C) 2002,2003,2004,2005,2006,2007 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
 
@@ -60,6 +60,15 @@
 size_t __static_tls_size;
 size_t __static_tls_align_m1;
 
+#ifndef __ASSUME_SET_ROBUST_LIST
+/* Negative if we do not have the system call and we can use it.  */
+int __set_robust_list_avail;
+# define set_robust_list_not_avail() \
+  __set_robust_list_avail = -1
+#else
+# define set_robust_list_not_avail() do { } while (0)
+#endif
+
 /* Version of the library, used in libthread_db to detect mismatches.  */
 static const char nptl_version[] __attribute_used__ = VERSION;
 
@@ -127,7 +136,9 @@ static const struct pthread_functions pthread_functions =
     .ptr_nthreads = &__nptl_nthreads,
     .ptr___pthread_unwind = &__pthread_unwind,
     .ptr__nptl_deallocate_tsd = __nptl_deallocate_tsd,
-    .ptr__nptl_setxid = __nptl_setxid
+    .ptr__nptl_setxid = __nptl_setxid,
+    /* For now only the stack cache needs to be freed.  */
+    .ptr_freeres = __free_stack_cache
   };
 # define ptr_pthread_functions &pthread_functions
 #else
@@ -139,6 +150,14 @@ static const struct pthread_functions pthread_functions =
 static void
 sigcancel_handler (int sig, siginfo_t *si, void *ctx)
 {
+#ifdef __ASSUME_CORRECT_SI_PID
+  /* Determine the process ID.  It might be negative if the thread is
+     in the middle of a fork() call.  */
+  pid_t pid = THREAD_GETMEM (THREAD_SELF, pid);
+  if (__builtin_expect (pid < 0, 0))
+    pid = -pid;
+#endif
+
   /* Safety check.  It would be possible to call this function for
      other signals and send a signal from another process.  This is not
      correct and might even be a security problem.  Try to catch as
@@ -147,7 +166,7 @@ sigcancel_handler (int sig, siginfo_t *si, void *ctx)
 #ifdef __ASSUME_CORRECT_SI_PID
       /* Kernels before 2.5.75 stored the thread ID and not the process
 	 ID in si_pid so we skip this test.  */
-      || si->si_pid != THREAD_GETMEM (THREAD_SELF, pid)
+      || si->si_pid != pid
 #endif
       || si->si_code != SI_TKILL)
     return;
@@ -192,6 +211,14 @@ struct xid_command *__xidcmd attribute_hidden;
 static void
 sighandler_setxid (int sig, siginfo_t *si, void *ctx)
 {
+#ifdef __ASSUME_CORRECT_SI_PID
+  /* Determine the process ID.  It might be negative if the thread is
+     in the middle of a fork() call.  */
+  pid_t pid = THREAD_GETMEM (THREAD_SELF, pid);
+  if (__builtin_expect (pid < 0, 0))
+    pid = -pid;
+#endif
+
   /* Safety check.  It would be possible to call this function for
      other signals and send a signal from another process.  This is not
      correct and might even be a security problem.  Try to catch as
@@ -200,7 +227,7 @@ sighandler_setxid (int sig, siginfo_t *si, void *ctx)
 #ifdef __ASSUME_CORRECT_SI_PID
       /* Kernels before 2.5.75 stored the thread ID and not the process
 	 ID in si_pid so we skip this test.  */
-      || si->si_pid != THREAD_GETMEM (THREAD_SELF, pid)
+      || si->si_pid != pid
 #endif
       || si->si_code != SI_TKILL)
     return;
@@ -211,6 +238,15 @@ sighandler_setxid (int sig, siginfo_t *si, void *ctx)
 
   if (atomic_decrement_val (&__xidcmd->cntr) == 0)
     lll_futex_wake (&__xidcmd->cntr, 1);
+
+  /* Reset the SETXID flag.  */
+  struct pthread *self = THREAD_SELF;
+  int flags = THREAD_GETMEM (self, cancelhandling);
+  THREAD_SETMEM (self, cancelhandling, flags & ~SETXID_BITMASK);
+
+  /* And release the futex.  */
+  self->setxid_futex = 1;
+  lll_futex_wake (&self->setxid_futex, 1);
 }
 
 
@@ -246,6 +282,21 @@ __pthread_initialize_minimal_internal (void)
   THREAD_SETMEM (pd, cpuclock_offset, GL(dl_cpuclock_offset));
 #endif
 
+  /* Initialize the robust mutex data.  */
+#ifdef __PTHREAD_MUTEX_HAVE_PREV
+  pd->robust_prev = &pd->robust_head;
+#endif
+  pd->robust_head.list = &pd->robust_head;
+#ifdef __NR_set_robust_list
+  pd->robust_head.futex_offset = (offsetof (pthread_mutex_t, __data.__lock)
+				  - offsetof (pthread_mutex_t,
+					      __data.__list.__next));
+  int res = INTERNAL_SYSCALL (set_robust_list, err, 2, &pd->robust_head,
+			      sizeof (struct robust_list_head));
+  if (INTERNAL_SYSCALL_ERROR_P (res, err))
+#endif
+    set_robust_list_not_avail ();
+
   /* Set initial thread's stack block from 0 up to __libc_stack_end.
      It will be bigger than it actually is, but for unwind.c/pt-longjmp.c
      purposes this is good enough.  */
@@ -262,7 +313,7 @@ __pthread_initialize_minimal_internal (void)
   struct sigaction sa;
   sa.sa_sigaction = sigcancel_handler;
   sa.sa_flags = SA_SIGINFO;
-  sigemptyset (&sa.sa_mask);
+  __sigemptyset (&sa.sa_mask);
 
   (void) __libc_sigaction (SIGCANCEL, &sa, NULL);
 
@@ -280,6 +331,17 @@ __pthread_initialize_minimal_internal (void)
   (void) INTERNAL_SYSCALL (rt_sigprocmask, err, 4, SIG_UNBLOCK, &sa.sa_mask,
 			   NULL, _NSIG / 8);
 
+  /* Get the size of the static and alignment requirements for the TLS
+     block.  */
+  size_t static_tls_align;
+  _dl_get_tls_static_info (&__static_tls_size, &static_tls_align);
+
+  /* Make sure the size takes all the alignments into account.  */
+  if (STACK_ALIGN > static_tls_align)
+    static_tls_align = STACK_ALIGN;
+  __static_tls_align_m1 = static_tls_align - 1;
+
+  __static_tls_size = roundup (__static_tls_size, static_tls_align);
 
   /* Determine the default allowed stack size.  This is the size used
      in case the user does not specify one.  */
@@ -288,29 +350,22 @@ __pthread_initialize_minimal_internal (void)
       || limit.rlim_cur == RLIM_INFINITY)
     /* The system limit is not usable.  Use an architecture-specific
        default.  */
-    __default_stacksize = ARCH_STACK_DEFAULT_SIZE;
+    limit.rlim_cur = ARCH_STACK_DEFAULT_SIZE;
   else if (limit.rlim_cur < PTHREAD_STACK_MIN)
     /* The system limit is unusably small.
        Use the minimal size acceptable.  */
-    __default_stacksize = PTHREAD_STACK_MIN;
-  else
-    {
-      /* Round the resource limit up to page size.  */
-      const uintptr_t pagesz = __sysconf (_SC_PAGESIZE);
-      __default_stacksize = (limit.rlim_cur + pagesz - 1) & -pagesz;
-    }
+    limit.rlim_cur = PTHREAD_STACK_MIN;
 
-  /* Get the size of the static and alignment requirements for the TLS
-     block.  */
-  size_t static_tls_align;
-  _dl_get_tls_static_info (&__static_tls_size, &static_tls_align);
+  /* Make sure it meets the minimum size that allocate_stack
+     (allocatestack.c) will demand, which depends on the page size.  */
+  const uintptr_t pagesz = __sysconf (_SC_PAGESIZE);
+  const size_t minstack = pagesz + __static_tls_size + MINIMAL_REST_STACK;
+  if (limit.rlim_cur < minstack)
+    limit.rlim_cur = minstack;
 
-  /* Make sure the size takes all the alignments into account.  */
-  if (STACK_ALIGN > static_tls_align)
-    static_tls_align = STACK_ALIGN;
-  __static_tls_align_m1 = static_tls_align - 1;
-
-  __static_tls_size = roundup (__static_tls_size, static_tls_align);
+  /* Round the resource limit up to page size.  */
+  limit.rlim_cur = (limit.rlim_cur + pagesz - 1) & -pagesz;
+  __default_stacksize = limit.rlim_cur;
 
 #ifdef SHARED
   /* Transfer the old value from the dynamic linker's internal location.  */
@@ -331,6 +386,8 @@ __pthread_initialize_minimal_internal (void)
 
   GL(dl_init_static_tls) = &__pthread_init_static_tls;
 
+  GL(dl_wait_lookup_done) = &__wait_lookup_done;
+
   /* Register the fork generation counter with the libc.  */
 #ifndef TLS_MULTIPLE_THREADS_IN_TCB
   __libc_multiple_threads_ptr =