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| author | Yao Qi <yao@codesourcery.com> | 2013-11-01 12:26:10 +0800 |
|---|---|---|
| committer | Yao Qi <yao@codesourcery.com> | 2013-11-24 14:56:49 +0800 |
| commit | 29453a14557af65ed7a0867722b0145bb9f0e0c2 (patch) | |
| tree | b73a98586473bb5a36387711bcf71778b27bab20 /gdb/doc | |
| parent | 0fb14d8ffde0940e0b55d529c50a5d424b763b13 (diff) | |
| download | gdb-29453a14557af65ed7a0867722b0145bb9f0e0c2.zip gdb-29453a14557af65ed7a0867722b0145bb9f0e0c2.tar.gz gdb-29453a14557af65ed7a0867722b0145bb9f0e0c2.tar.bz2 | |
set/show code-cache
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.
Diffstat (limited to 'gdb/doc')
| -rw-r--r-- | gdb/doc/ChangeLog | 5 | ||||
| -rw-r--r-- | gdb/doc/gdb.texinfo | 15 |
2 files changed, 19 insertions, 1 deletions
diff --git a/gdb/doc/ChangeLog b/gdb/doc/ChangeLog index 7ec3f61..141d47f 100644 --- a/gdb/doc/ChangeLog +++ b/gdb/doc/ChangeLog @@ -1,5 +1,10 @@ 2013-11-24 Yao Qi <yao@codesourcery.com> + * gdb.texinfo (Caching Remote Data): Document new + "set/show stack-cache" option. + +2013-11-24 Yao Qi <yao@codesourcery.com> + * gdb.texinfo (Caching Target Data): Replace "ON" with "on". (Maintenance Commands): Replace "ON" and "OFF" with "on" and "off" respectively. diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo index 830a156..004c376 100644 --- a/gdb/doc/gdb.texinfo +++ b/gdb/doc/gdb.texinfo @@ -10842,7 +10842,8 @@ Therefore, by default, @value{GDBN} only caches data known to be on the stack@footnote{In non-stop mode, it is moderately rare for a running thread to modify the stack of a stopped thread in a way that would interfere with a backtrace, and caching of -stack reads provides a significant speed up of remote backtraces.}. +stack reads provides a significant speed up of remote backtraces.} or +in the code segment. Other regions of memory can be explicitly marked as cacheable; @pxref{Memory Region Attributes}. @@ -10867,6 +10868,18 @@ caching. By default, this option is @code{on}. @item show stack-cache Show the current state of data caching for memory accesses. +@kindex set code-cache +@item set code-cache on +@itemx set code-cache off +Enable or disable caching of code segment accesses. When @code{on}, +use caching. By default, this option is @code{on}. This improves +performance of disassembly in remote debugging. + +@kindex show code-cache +@item show code-cache +Show the current state of target memory cache for code segment +accesses. + @kindex info dcache @item info dcache @r{[}line@r{]} Print the information about the performance of data cache of the |