diff options
| -rw-r--r-- | nptl/allocatestack.c | 10 | ||||
| -rw-r--r-- | nptl/stack-aliasing.h | 23 | ||||
| -rw-r--r-- | sysdeps/i386/i686/stack-aliasing.h | 23 | ||||
| -rw-r--r-- | sysdeps/x86_64/stack-aliasing.h | 1 |
4 files changed, 0 insertions, 57 deletions
diff --git a/nptl/allocatestack.c b/nptl/allocatestack.c index 149b999603..00fddbd409 100644 --- a/nptl/allocatestack.c +++ b/nptl/allocatestack.c @@ -31,7 +31,6 @@ #include <lowlevellock.h> #include <futex-internal.h> #include <kernel-features.h> -#include <stack-aliasing.h> #ifndef NEED_SEPARATE_REGISTER_STACK @@ -547,15 +546,6 @@ allocate_stack (const struct pthread_attr *attr, struct pthread **pdp, pd = get_cached_stack (&size, &mem); if (pd == NULL) { - /* To avoid aliasing effects on a larger scale than pages we - adjust the allocated stack size if necessary. This way - allocations directly following each other will not have - aliasing problems. */ -#if MULTI_PAGE_ALIASING != 0 - if ((size % MULTI_PAGE_ALIASING) == 0) - size += pagesize_m1 + 1; -#endif - /* If a guard page is required, avoid committing memory by first allocate with PROT_NONE and then reserve with required permission excluding the guard page. */ diff --git a/nptl/stack-aliasing.h b/nptl/stack-aliasing.h deleted file mode 100644 index bfdde53e53..0000000000 --- a/nptl/stack-aliasing.h +++ /dev/null @@ -1,23 +0,0 @@ -/* Define macros for stack address aliasing issues for NPTL. Stub version. - Copyright (C) 2014-2021 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - <https://www.gnu.org/licenses/>. */ - -/* This is a number of bytes that is an alignment that should be avoided - when choosing the exact size of a new thread's stack. If the size - chosen is aligned to this, an extra page will be added to render the - size off-aligned. */ -#define MULTI_PAGE_ALIASING 0 diff --git a/sysdeps/i386/i686/stack-aliasing.h b/sysdeps/i386/i686/stack-aliasing.h deleted file mode 100644 index d521dcdb75..0000000000 --- a/sysdeps/i386/i686/stack-aliasing.h +++ /dev/null @@ -1,23 +0,0 @@ -/* Define macros for stack address aliasing issues for NPTL. i686 version. - Copyright (C) 2014-2021 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - <https://www.gnu.org/licenses/>. */ - -/* What is useful is to avoid the 64k aliasing problem which reliably - happens if all stacks use sizes which are a multiple of 64k. Tell - the stack allocator to disturb this by allocation one more page if - necessary. */ -#define MULTI_PAGE_ALIASING 65536 diff --git a/sysdeps/x86_64/stack-aliasing.h b/sysdeps/x86_64/stack-aliasing.h deleted file mode 100644 index 2efdacb3b4..0000000000 --- a/sysdeps/x86_64/stack-aliasing.h +++ /dev/null @@ -1 +0,0 @@ -#include <sysdeps/i386/i686/stack-aliasing.h> |