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29453a1455
Similar to stack cache, in this patch, we add TARGET_OBJECT_CODE_MEMORY to read code from target and add a new option "set code-cache on|off" to optimize code accesses by using the target memory cache. In V4: - Remove "without affecting correctness" from NEWS and doc. - Replace "ON" with "on" in doc. - "access" -> "accesses". In V3: - Rename functions and variables. - Update command help, doc and NEWS entry. - Invalidate cache on option transitions, to align with the behaviour of "stack-cache". Since cache invalidation is transparent to users, users don't know option "stack-cache" transitions cause code cache invalidation. V2 was reviewed by Doug. There are some changes in V3, so I post it here. gdb: 2013-11-24 Yao Qi <yao@codesourcery.com> * NEWS: Add note on new "set code-cache" option. * target-dcache.c (code_cache_enabled_1): New variable. (code_cache_enabled): New variable. (show_code_cache, set_code_cache): New function. (code_cache_enabled_p): New function. (_initialize_target_dcache): Register command. * target-dcache.h (code_cache_enabled_p): Declare. * target.c (memory_xfer_partial_1):Handle TARGET_OBJECT_CODE_MEMORY and code_cache_enabled. (target_read_code): New function. * target.h (enum target_object) <TARGET_OBJECT_CODE_MEMORY>: New. (target_read_code): Declare. gdb/doc: 2013-11-24 Yao Qi <yao@codesourcery.com> * gdb.texinfo (Caching Remote Data): Document new "set/show stack-cache" option.
36 lines
1.1 KiB
C
36 lines
1.1 KiB
C
/* Copyright (C) 1992-2013 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifndef TARGET_DCACHE_H
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#define TARGET_DCACHE_H
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#include "dcache.h"
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extern void target_dcache_invalidate (void);
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extern DCACHE *target_dcache_get (void);
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extern DCACHE *target_dcache_get_or_init (void);
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extern int target_dcache_init_p (void);
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extern int stack_cache_enabled_p (void);
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extern int code_cache_enabled_p (void);
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#endif /* TARGET_DCACHE_H */
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