Use libidn2 for IDNA support (#1452750)
This commit is contained in:
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@ -0,0 +1,412 @@
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commit a829b747cf2ce18ba869ea60f67975c484bf2769
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Author: Istvan Kurucsai <pistukem@gmail.com>
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Date: Fri Jan 12 15:34:13 2018 +0100
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Implement allocate_once for atomic initialization with allocation
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diff --git a/include/allocate_once.h b/include/allocate_once.h
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new file mode 100644
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index 0000000000000000..26902dde7c1a3255
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--- /dev/null
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+++ b/include/allocate_once.h
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@@ -0,0 +1,95 @@
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+/* Allocate and initialize an object once, in a thread-safe fashion.
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+ Copyright (C) 2018 Free Software Foundation, Inc.
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+ This file is part of the GNU C Library.
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+
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+ The GNU C Library is free software; you can redistribute it and/or
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+ modify it under the terms of the GNU Lesser General Public
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+ License as published by the Free Software Foundation; either
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+ version 2.1 of the License, or (at your option) any later version.
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+
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+ The GNU C Library is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ Lesser General Public License for more details.
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+
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+ You should have received a copy of the GNU Lesser General Public
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+ License along with the GNU C Library; if not, see
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+ <http://www.gnu.org/licenses/>. */
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+
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+#ifndef _ALLOCATE_ONCE_H
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+#define _ALLOCATE_ONCE_H
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+
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+#include <atomic.h>
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+
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+/* Slow path for allocate_once; see below. */
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+void *__libc_allocate_once_slow (void **__place,
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+ void *(*__allocate) (void *__closure),
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+ void (*__deallocate) (void *__closure,
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+ void *__ptr),
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+ void *__closure);
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+
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+/* Return an a pointer to an allocated and initialized data structure.
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+ If this function returns a non-NULL value, the caller can assume
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+ that pointed-to data has been initialized according to the ALLOCATE
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+ function.
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+
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+ It is expected that callers define an inline helper function which
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+ adds type safety, like this.
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+
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+ struct foo { ... };
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+ struct foo *global_foo;
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+ static void *allocate_foo (void *closure);
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+ static void *deallocate_foo (void *closure, void *ptr);
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+
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+ static inline struct foo *
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+ get_foo (void)
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+ {
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+ return allocate_once (&global_foo, allocate_foo, free_foo, NULL);
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+ }
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+
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+ (Note that the global_foo variable is initialized to zero.)
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+ Usage of this helper function looks like this:
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+
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+ struct foo *local_foo = get_foo ();
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+ if (local_foo == NULL)
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+ report_allocation_failure ();
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+
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+ allocate_once first performs an acquire MO load on *PLACE. If the
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+ result is not null, it is returned. Otherwise, ALLOCATE (CLOSURE)
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+ is called, yielding a value RESULT. If RESULT equals NULL,
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+ allocate_once returns NULL, and does not modify *PLACE (but another
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+ thread may concurrently perform an allocation which succeeds,
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+ updating *PLACE). If RESULT does not equal NULL, the function uses
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+ a CAS with acquire-release MO to update the NULL value in *PLACE
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+ with the RESULT value. If it turns out that *PLACE was updated
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+ concurrently, allocate_once calls DEALLOCATE (CLOSURE, RESULT) to
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+ undo the effect of ALLOCATE, and returns the new value of *PLACE
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+ (after an acquire MO load). If DEALLOCATE is NULL, free (RESULT)
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+ is called instead.
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+
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+ Compared to __libc_once, allocate_once has the advantage that it
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+ does not need separate space for a control variable, and that it is
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+ safe with regards to cancellation and other forms of exception
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+ handling if the supplied callback functions are safe in that
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+ regard. allocate_once passes a closure parameter to the allocation
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+ function, too. */
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+static inline void *
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+allocate_once (void **__place, void *(*__allocate) (void *__closure),
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+ void (*__deallocate) (void *__closure, void *__ptr),
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+ void *__closure)
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+{
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+ /* Synchronizes with the release MO CAS in
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+ __allocate_once_slow. */
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+ void *__result = atomic_load_acquire (__place);
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+ if (__result != NULL)
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+ return __result;
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+ else
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+ return __libc_allocate_once_slow (__place, __allocate, __deallocate,
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+ __closure);
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+}
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+
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+#ifndef _ISOMAC
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+libc_hidden_proto (__libc_allocate_once_slow)
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+#endif
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+
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+#endif /* _ALLOCATE_ONCE_H */
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diff --git a/misc/Makefile b/misc/Makefile
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index a5076b36728749d6..96afd6d890bd06f3 100644
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--- a/misc/Makefile
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+++ b/misc/Makefile
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@@ -70,9 +70,11 @@ routines := brk sbrk sstk ioctl \
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getloadavg getclktck \
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fgetxattr flistxattr fremovexattr fsetxattr getxattr \
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listxattr lgetxattr llistxattr lremovexattr lsetxattr \
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- removexattr setxattr getauxval ifunc-impl-list makedev
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+ removexattr setxattr getauxval ifunc-impl-list makedev \
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+ allocate_once
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-generated += tst-error1.mtrace tst-error1-mem.out
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+generated += tst-error1.mtrace tst-error1-mem.out \
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+ tst-allocate_once.mtrace tst-allocate_once-mem.out
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aux := init-misc
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install-lib := libg.a
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@@ -84,11 +86,12 @@ tests := tst-dirname tst-tsearch tst-fdset tst-efgcvt tst-mntent tst-hsearch \
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tst-preadvwritev tst-preadvwritev64 tst-makedev tst-empty \
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tst-preadvwritev2 tst-preadvwritev64v2
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-tests-internal := tst-atomic tst-atomic-long
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+tests-internal := tst-atomic tst-atomic-long tst-allocate_once
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tests-static := tst-empty
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ifeq ($(run-built-tests),yes)
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-tests-special += $(objpfx)tst-error1-mem.out
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+tests-special += $(objpfx)tst-error1-mem.out \
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+ $(objpfx)tst-allocate_once-mem.out
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endif
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CFLAGS-select.c += -fexceptions -fasynchronous-unwind-tables
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@@ -137,3 +140,8 @@ tst-error1-ARGS = $(objpfx)tst-error1.out
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$(objpfx)tst-error1-mem.out: $(objpfx)tst-error1.out
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$(common-objpfx)malloc/mtrace $(objpfx)tst-error1.mtrace > $@; \
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$(evaluate-test)
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+
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+tst-allocate_once-ENV = MALLOC_TRACE=$(objpfx)tst-allocate_once.mtrace
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+$(objpfx)tst-allocate_once-mem.out: $(objpfx)tst-allocate_once.out
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+ $(common-objpfx)malloc/mtrace $(objpfx)tst-allocate_once.mtrace > $@; \
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+ $(evaluate-test)
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diff --git a/misc/Versions b/misc/Versions
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index bfbda505e4dd8743..900e4ffb798a9e13 100644
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--- a/misc/Versions
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+++ b/misc/Versions
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@@ -165,5 +165,6 @@ libc {
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__tdelete; __tfind; __tsearch; __twalk;
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__mmap; __munmap; __mprotect;
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__sched_get_priority_min; __sched_get_priority_max;
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+ __libc_allocate_once_slow;
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}
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}
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diff --git a/misc/allocate_once.c b/misc/allocate_once.c
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new file mode 100644
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index 0000000000000000..2108014604cb026e
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--- /dev/null
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+++ b/misc/allocate_once.c
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@@ -0,0 +1,59 @@
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+/* Concurrent allocation and initialization of a pointer.
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+ Copyright (C) 2018 Free Software Foundation, Inc.
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+ This file is part of the GNU C Library.
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+
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+ The GNU C Library is free software; you can redistribute it and/or
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+ modify it under the terms of the GNU Lesser General Public
|
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|
+ License as published by the Free Software Foundation; either
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+ version 2.1 of the License, or (at your option) any later version.
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+
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+ The GNU C Library is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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|
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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|
+ Lesser General Public License for more details.
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|
+
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+ You should have received a copy of the GNU Lesser General Public
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+ License along with the GNU C Library; if not, see
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+ <http://www.gnu.org/licenses/>. */
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+
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+#include <allocate_once.h>
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+#include <stdlib.h>
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+#include <stdbool.h>
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+
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+void *
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+__libc_allocate_once_slow (void **place, void *(*allocate) (void *closure),
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+ void (*deallocate) (void *closure, void *ptr),
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+ void *closure)
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+{
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+ void *result = allocate (closure);
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+ if (result == NULL)
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+ return NULL;
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+
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+ /* This loop implements a strong CAS on *place, with acquire-release
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+ MO semantics, from a weak CAS with relaxed-release MO. */
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+ while (true)
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+ {
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+ /* Synchronizes with the acquire MO load in allocate_once. */
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+ void *expected = NULL;
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+ if (atomic_compare_exchange_weak_release (place, &expected, result))
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+ return result;
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+
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+ /* The failed CAS has relaxed MO semantics, so perform another
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+ acquire MO load. */
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+ void *other_result = atomic_load_acquire (place);
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+ if (other_result == NULL)
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+ /* Spurious failure. Try again. */
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+ continue;
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+
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+ /* We lost the race. Free what we allocated and return the
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+ other result. */
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+ if (deallocate == NULL)
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+ free (result);
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+ else
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+ deallocate (closure, result);
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+ return other_result;
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+ }
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+
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+ return result;
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+}
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+libc_hidden_def (__libc_allocate_once_slow)
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diff --git a/misc/tst-allocate_once.c b/misc/tst-allocate_once.c
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new file mode 100644
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index 0000000000000000..89277b33b769732b
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--- /dev/null
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+++ b/misc/tst-allocate_once.c
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@@ -0,0 +1,181 @@
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+/* Test the allocate_once function.
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+ Copyright (C) 2018 Free Software Foundation, Inc.
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+ This file is part of the GNU C Library.
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+
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|
+ The GNU C Library is free software; you can redistribute it and/or
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|
+ modify it under the terms of the GNU Lesser General Public
|
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|
+ License as published by the Free Software Foundation; either
|
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|
+ version 2.1 of the License, or (at your option) any later version.
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+
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+ The GNU C Library is distributed in the hope that it will be useful,
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|
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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|
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
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|
+ Lesser General Public License for more details.
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|
+
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|
+ You should have received a copy of the GNU Lesser General Public
|
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|
+ License along with the GNU C Library; if not, see
|
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|
+ <http://www.gnu.org/licenses/>. */
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+
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+#include <allocate_once.h>
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+#include <mcheck.h>
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+#include <string.h>
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+#include <support/check.h>
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+#include <support/support.h>
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+
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+/* Allocate a new string. */
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+static void *
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+allocate_string (void *closure)
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+{
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+ return xstrdup (closure);
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|
+}
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+
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|
+/* Allocation and deallocation functions which are not expected to be
|
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|
+ called. */
|
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|
+
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|
+static void *
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+allocate_not_called (void *closure)
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|
+{
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|
+ FAIL_EXIT1 ("allocation function called unexpectedly (%p)", closure);
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|
+}
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|
+
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+static void
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+deallocate_not_called (void *closure, void *ptr)
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|
+{
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|
+ FAIL_EXIT1 ("deallocate function called unexpectedly (%p, %p)",
|
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|
+ closure, ptr);
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|
+}
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|
+
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|
+/* Counter for various function calls. */
|
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|
+static int function_called;
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|
+
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||||||
|
+/* An allocation function which returns NULL and records that it has
|
||||||
|
+ been called. */
|
||||||
|
+static void *
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||||||
|
+allocate_return_null (void *closure)
|
||||||
|
+{
|
||||||
|
+ /* The function should only be called once. */
|
||||||
|
+ TEST_COMPARE (function_called, 0);
|
||||||
|
+ ++function_called;
|
||||||
|
+ return NULL;
|
||||||
|
+}
|
||||||
|
+
|
||||||
|
+
|
||||||
|
+/* The following is used to check the retry logic, by causing a fake
|
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|
+ race condition. */
|
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|
+static void *fake_race_place;
|
||||||
|
+static char fake_race_region[3]; /* To obtain unique addresses. */
|
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|
+
|
||||||
|
+static void *
|
||||||
|
+fake_race_allocate (void *closure)
|
||||||
|
+{
|
||||||
|
+ TEST_VERIFY (closure == &fake_race_region[0]);
|
||||||
|
+ TEST_COMPARE (function_called, 0);
|
||||||
|
+ ++function_called;
|
||||||
|
+ /* Fake allocation by another thread. */
|
||||||
|
+ fake_race_place = &fake_race_region[1];
|
||||||
|
+ return &fake_race_region[2];
|
||||||
|
+}
|
||||||
|
+
|
||||||
|
+static void
|
||||||
|
+fake_race_deallocate (void *closure, void *ptr)
|
||||||
|
+{
|
||||||
|
+ /* Check that the pointer returned from fake_race_allocate is
|
||||||
|
+ deallocated (and not the one stored in fake_race_place). */
|
||||||
|
+ TEST_VERIFY (ptr == &fake_race_region[2]);
|
||||||
|
+
|
||||||
|
+ TEST_VERIFY (fake_race_place == &fake_race_region[1]);
|
||||||
|
+ TEST_VERIFY (closure == &fake_race_region[0]);
|
||||||
|
+ TEST_COMPARE (function_called, 1);
|
||||||
|
+ ++function_called;
|
||||||
|
+}
|
||||||
|
+
|
||||||
|
+/* Similar to fake_race_allocate, but expects to be paired with free
|
||||||
|
+ as the deallocation function. */
|
||||||
|
+static void *
|
||||||
|
+fake_race_allocate_for_free (void *closure)
|
||||||
|
+{
|
||||||
|
+ TEST_VERIFY (closure == &fake_race_region[0]);
|
||||||
|
+ TEST_COMPARE (function_called, 0);
|
||||||
|
+ ++function_called;
|
||||||
|
+ /* Fake allocation by another thread. */
|
||||||
|
+ fake_race_place = &fake_race_region[1];
|
||||||
|
+ return xstrdup ("to be freed");
|
||||||
|
+}
|
||||||
|
+
|
||||||
|
+static int
|
||||||
|
+do_test (void)
|
||||||
|
+{
|
||||||
|
+ mtrace ();
|
||||||
|
+
|
||||||
|
+ /* Simple allocation. */
|
||||||
|
+ void *place1 = NULL;
|
||||||
|
+ char *string1 = allocate_once (&place1, allocate_string,
|
||||||
|
+ deallocate_not_called,
|
||||||
|
+ (char *) "test string 1");
|
||||||
|
+ TEST_VERIFY_EXIT (string1 != NULL);
|
||||||
|
+ TEST_VERIFY (strcmp ("test string 1", string1) == 0);
|
||||||
|
+ /* Second call returns the first pointer, without calling any
|
||||||
|
+ callbacks. */
|
||||||
|
+ TEST_VERIFY (string1
|
||||||
|
+ == allocate_once (&place1, allocate_not_called,
|
||||||
|
+ deallocate_not_called,
|
||||||
|
+ (char *) "test string 1a"));
|
||||||
|
+
|
||||||
|
+ /* Different place should result in another call. */
|
||||||
|
+ void *place2 = NULL;
|
||||||
|
+ char *string2 = allocate_once (&place2, allocate_string,
|
||||||
|
+ deallocate_not_called,
|
||||||
|
+ (char *) "test string 2");
|
||||||
|
+ TEST_VERIFY_EXIT (string2 != NULL);
|
||||||
|
+ TEST_VERIFY (strcmp ("test string 2", string2) == 0);
|
||||||
|
+ TEST_VERIFY (string1 != string2);
|
||||||
|
+
|
||||||
|
+ /* Check error reporting (NULL return value from the allocation
|
||||||
|
+ function). */
|
||||||
|
+ void *place3 = NULL;
|
||||||
|
+ char *string3 = allocate_once (&place3, allocate_return_null,
|
||||||
|
+ deallocate_not_called, NULL);
|
||||||
|
+ TEST_VERIFY (string3 == NULL);
|
||||||
|
+ TEST_COMPARE (function_called, 1);
|
||||||
|
+
|
||||||
|
+ /* Check that the deallocation function is called if the race is
|
||||||
|
+ lost. */
|
||||||
|
+ function_called = 0;
|
||||||
|
+ TEST_VERIFY (allocate_once (&fake_race_place,
|
||||||
|
+ fake_race_allocate,
|
||||||
|
+ fake_race_deallocate,
|
||||||
|
+ &fake_race_region[0])
|
||||||
|
+ == &fake_race_region[1]);
|
||||||
|
+ TEST_COMPARE (function_called, 2);
|
||||||
|
+ function_called = 3;
|
||||||
|
+ TEST_VERIFY (allocate_once (&fake_race_place,
|
||||||
|
+ fake_race_allocate,
|
||||||
|
+ fake_race_deallocate,
|
||||||
|
+ &fake_race_region[0])
|
||||||
|
+ == &fake_race_region[1]);
|
||||||
|
+ TEST_COMPARE (function_called, 3);
|
||||||
|
+
|
||||||
|
+ /* Similar, but this time rely on that free is called. */
|
||||||
|
+ function_called = 0;
|
||||||
|
+ fake_race_place = NULL;
|
||||||
|
+ TEST_VERIFY (allocate_once (&fake_race_place,
|
||||||
|
+ fake_race_allocate_for_free,
|
||||||
|
+ NULL,
|
||||||
|
+ &fake_race_region[0])
|
||||||
|
+ == &fake_race_region[1]);
|
||||||
|
+ TEST_COMPARE (function_called, 1);
|
||||||
|
+ function_called = 3;
|
||||||
|
+ TEST_VERIFY (allocate_once (&fake_race_place,
|
||||||
|
+ fake_race_allocate_for_free,
|
||||||
|
+ NULL,
|
||||||
|
+ &fake_race_region[0])
|
||||||
|
+ == &fake_race_region[1]);
|
||||||
|
+ TEST_COMPARE (function_called, 3);
|
||||||
|
+
|
||||||
|
+ free (place2);
|
||||||
|
+ free (place1);
|
||||||
|
+
|
||||||
|
+ return 0;
|
||||||
|
+}
|
||||||
|
+
|
||||||
|
+#include <support/test-driver.c>
|
File diff suppressed because it is too large
Load Diff
14
glibc.spec
14
glibc.spec
|
@ -1,6 +1,6 @@
|
||||||
%define glibcsrcdir glibc-2.26.9000-1125-g860b0240a5
|
%define glibcsrcdir glibc-2.26.9000-1125-g860b0240a5
|
||||||
%define glibcversion 2.26.9000
|
%define glibcversion 2.26.9000
|
||||||
%define glibcrelease 41%{?dist}
|
%define glibcrelease 42%{?dist}
|
||||||
# Pre-release tarballs are pulled in from git using a command that is
|
# Pre-release tarballs are pulled in from git using a command that is
|
||||||
# effectively:
|
# effectively:
|
||||||
#
|
#
|
||||||
|
@ -213,8 +213,9 @@ Patch2027: glibc-rh819430.patch
|
||||||
|
|
||||||
Patch2031: glibc-rh1070416.patch
|
Patch2031: glibc-rh1070416.patch
|
||||||
|
|
||||||
# extend_alloca removal, BZ 18023
|
|
||||||
Patch2037: glibc-rh1315108.patch
|
Patch2037: glibc-rh1315108.patch
|
||||||
|
Patch2040: glibc-rh1452750-allocate_once.patch
|
||||||
|
Patch2041: glibc-rh1452750-libidn2.patch
|
||||||
|
|
||||||
##############################################################################
|
##############################################################################
|
||||||
# End of glibc patches.
|
# End of glibc patches.
|
||||||
|
@ -313,6 +314,9 @@ BuildRequires: libstdc++-static
|
||||||
# check to pass even if we aren't going to use any of those objects to
|
# check to pass even if we aren't going to use any of those objects to
|
||||||
# build the tests.
|
# build the tests.
|
||||||
BuildRequires: glibc-static
|
BuildRequires: glibc-static
|
||||||
|
|
||||||
|
# libidn2 (but not libidn2-devel) is needed for testing AI_IDN/NI_IDN.
|
||||||
|
BuildRequires: libidn2
|
||||||
%endif
|
%endif
|
||||||
%endif
|
%endif
|
||||||
|
|
||||||
|
@ -753,6 +757,8 @@ microbenchmark tests on the system.
|
||||||
%patch0053 -p1
|
%patch0053 -p1
|
||||||
%patch0059 -p1
|
%patch0059 -p1
|
||||||
%patch2037 -p1
|
%patch2037 -p1
|
||||||
|
%patch2040 -p1
|
||||||
|
%patch2041 -p1
|
||||||
|
|
||||||
##############################################################################
|
##############################################################################
|
||||||
# %%prep - Additional prep required...
|
# %%prep - Additional prep required...
|
||||||
|
@ -2061,6 +2067,10 @@ fi
|
||||||
%endif
|
%endif
|
||||||
|
|
||||||
%changelog
|
%changelog
|
||||||
|
* Wed Jan 17 2018 Florian Weimer <fweimer@redhat.com> - 2.26.9000-42
|
||||||
|
- CVE-2017-14062, CVE-2016-6261, CVE-2016-6263:
|
||||||
|
Use libidn2 for IDNA support (#1452750)
|
||||||
|
|
||||||
* Mon Jan 15 2018 Florian Weimer <fweimer@redhat.com> - 2.26.9000-41
|
* Mon Jan 15 2018 Florian Weimer <fweimer@redhat.com> - 2.26.9000-41
|
||||||
- CVE-2018-1000001: Make getcwd fail if it cannot obtain an absolute path
|
- CVE-2018-1000001: Make getcwd fail if it cannot obtain an absolute path
|
||||||
(#1533837)
|
(#1533837)
|
||||||
|
|
Loading…
Reference in New Issue