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Diffstat (limited to 'gcc/ada/s-stchop.ads')
| -rw-r--r-- | gcc/ada/s-stchop.ads | 82 |
1 files changed, 0 insertions, 82 deletions
diff --git a/gcc/ada/s-stchop.ads b/gcc/ada/s-stchop.ads deleted file mode 100644 index 014eddc417a..00000000000 --- a/gcc/ada/s-stchop.ads +++ /dev/null @@ -1,82 +0,0 @@ ------------------------------------------------------------------------------- --- -- --- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS -- --- -- --- S Y S T E M . S T A C K _ C H E C K I N G . O P E R A T I O N S -- --- -- --- S p e c -- --- -- --- Copyright (C) 1999-2009, Free Software Foundation, Inc. -- --- -- --- GNARL is free software; you can redistribute it and/or modify it under -- --- terms of the GNU General Public License as published by the Free Soft- -- --- ware Foundation; either version 3, or (at your option) any later ver- -- --- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- --- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- --- or FITNESS FOR A PARTICULAR PURPOSE. -- --- -- --- As a special exception under Section 7 of GPL version 3, you are granted -- --- additional permissions described in the GCC Runtime Library Exception, -- --- version 3.1, as published by the Free Software Foundation. -- --- -- --- You should have received a copy of the GNU General Public License and -- --- a copy of the GCC Runtime Library Exception along with this program; -- --- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- --- <http://www.gnu.org/licenses/>. -- --- -- --- GNARL was developed by the GNARL team at Florida State University. -- --- Extensive contributions were provided by Ada Core Technologies, Inc. -- --- -- ------------------------------------------------------------------------------- - --- This package provides a implementation of stack checking operations using --- comparison with stack base and limit. - -pragma Restrictions (No_Elaboration_Code); --- We want to guarantee the absence of elaboration code because the binder --- does not handle references to this package. - -pragma Polling (Off); --- Turn off polling, we do not want polling to take place during stack --- checking operations. It causes infinite loops and other problems. - -with System.Storage_Elements; - -package System.Stack_Checking.Operations is - pragma Preelaborate; - - procedure Update_Stack_Cache (Stack : Stack_Access); - -- Set the stack cache for the current task. Note that this is only for - -- optimization purposes, nothing can be assumed about the contents of the - -- cache at any time, see Set_Stack_Info. - -- - -- The stack cache should contain the bounds of the current task. But - -- because the RTS is not aware of task switches, the stack cache may be - -- incorrect. So when the stack pointer is not within the bounds of the - -- stack cache, Stack_Check first update the cache (which is a costly - -- operation hence the need of a cache). - - procedure Invalidate_Stack_Cache (Any_Stack : Stack_Access); - -- Invalidate cache entries for the task T that owns Any_Stack. This causes - -- the Set_Stack_Info function to be called during the next stack check - -- done by T. This can be used to interrupt task T asynchronously. - -- Stack_Check should be called in loops for this to work reliably. - - function Stack_Check (Stack_Address : System.Address) return Stack_Access; - -- This version of Stack_Check should not be inlined - - procedure Notify_Stack_Attributes - (Initial_SP : System.Address; - Size : System.Storage_Elements.Storage_Offset); - -- Register Initial_SP as the initial stack pointer value for the current - -- task when it starts and Size as the associated stack area size. This - -- should be called once, after the soft-links have been initialized and - -- prior to the first "Stack_Check" call. - -private - Cache : aliased Stack_Access := Null_Stack; - - pragma Export (C, Cache, "_gnat_stack_cache"); - pragma Export (C, Stack_Check, "_gnat_stack_check"); - -end System.Stack_Checking.Operations; |