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sthibault pushed a commit to branch sid
in repository glibc.
commit 5d92864b194e42e7480ddafcb8329f9d64e08e05
Author: Samuel Thibault <samuel.thiba...@ens-lyon.org>
Date: Mon Apr 4 10:15:55 2016 +0200
hurd: fix inheritence of shared anonymous memory
hurd-i386/submitted-anon-mmap-shared.diff
---
debian/changelog | 2 ++
.../hurd-i386/submitted-anon-mmap-shared.diff | 36 ++++++++++++++++++++++
debian/patches/series | 1 +
3 files changed, 39 insertions(+)
diff --git a/debian/changelog b/debian/changelog
index 3d6971b..04359d9 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -2,6 +2,8 @@ glibc (2.22-6) UNRELEASED; urgency=medium
[ Samuel Thibault ]
* hurd-i386/submitted-auxv.diff: New patch, fixes cvs crash.
+ * hurd-i386/submitted-anon-mmap-shared.diff: New patch, fixes inheritence of
+ shared anonymous memory.
-- Aurelien Jarno <aure...@debian.org> Tue, 29 Mar 2016 00:50:55 +0200
diff --git a/debian/patches/hurd-i386/submitted-anon-mmap-shared.diff
b/debian/patches/hurd-i386/submitted-anon-mmap-shared.diff
new file mode 100644
index 0000000..5903cda
--- /dev/null
+++ b/debian/patches/hurd-i386/submitted-anon-mmap-shared.diff
@@ -0,0 +1,36 @@
+Optimizing anonymous maps brings bugs, and does not optimize much anyway.
+
+https://sourceware.org/bugzilla/show_bug.cgi?id=19903
+
+--- a/sysdeps/mach/hurd/mmap.c
++++ b/sysdeps/mach/hurd/mmap.c
+@@ -44,29 +44,6 @@ __mmap (__ptr_t addr, size_t len, int pr
+ if ((mapaddr & (vm_page_size - 1)) || (offset & (vm_page_size - 1)))
+ return (__ptr_t) (long int) __hurd_fail (EINVAL);
+
+- if ((flags & (MAP_TYPE|MAP_INHERIT)) == MAP_ANON
+- && prot == (PROT_READ|PROT_WRITE)) /* cf VM_PROT_DEFAULT */
+- {
+- /* vm_allocate has (a little) less overhead in the kernel too. */
+- err = __vm_allocate (__mach_task_self (), &mapaddr, len, mapaddr == 0);
+-
+- if (err == KERN_NO_SPACE)
+- {
+- if (flags & MAP_FIXED)
+- {
+- /* XXX this is not atomic as it is in unix! */
+- /* The region is already allocated; deallocate it first. */
+- err = __vm_deallocate (__mach_task_self (), mapaddr, len);
+- if (!err)
+- err = __vm_allocate (__mach_task_self (), &mapaddr, len, 0);
+- }
+- else if (mapaddr != 0)
+- err = __vm_allocate (__mach_task_self (), &mapaddr, len, 1);
+- }
+-
+- return err ? (__ptr_t) (long int) __hurd_fail (err) : (__ptr_t) mapaddr;
+- }
+-
+ vmprot = VM_PROT_NONE;
+ if (prot & PROT_READ)
+ vmprot |= VM_PROT_READ;
diff --git a/debian/patches/series b/debian/patches/series
index ab07864..481fa2a 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -152,6 +152,7 @@ hurd-i386/submitted-hurd-abilist.diff
hurd-i386/cvs-errnos.d.diff
hurd-i386/cvs-mach-syscalls.mk.diff
hurd-i386/submitted-auxv.diff
+hurd-i386/submitted-anon-mmap-shared.diff
i386/local-biarch.diff
i386/local-cmov.diff
--
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