* [ feature request ] : software watchpoints, search byte pattern
@ 2003-05-28 4:53 Claudio Fontana
2003-05-28 15:31 ` Eli Zaretskii
0 siblings, 1 reply; 2+ messages in thread
From: Claudio Fontana @ 2003-05-28 4:53 UTC (permalink / raw)
To: gdb
Hello,
do you think these features can be added in the
following versions?
- software watchpoints: rwatch and awatch which, if
hardware breakpoints are not available, revert to
software ones
- search byte pattern: a memory pattern 'search'
function
Claudio Fontana
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^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [ feature request ] : software watchpoints, search byte pattern
2003-05-28 4:53 [ feature request ] : software watchpoints, search byte pattern Claudio Fontana
@ 2003-05-28 15:31 ` Eli Zaretskii
0 siblings, 0 replies; 2+ messages in thread
From: Eli Zaretskii @ 2003-05-28 15:31 UTC (permalink / raw)
To: sick_soul; +Cc: gdb
> Date: Wed, 28 May 2003 06:53:21 +0200 (CEST)
> From: =?iso-8859-1?q?Claudio=20Fontana?= <sick_soul@yahoo.it>
>
> Hello,
> do you think these features can be added in the
> following versions?
>
> - software watchpoints: rwatch and awatch which, if
> hardware breakpoints are not available, revert to
> software ones
To implement software watchpoints, GDB single-steps the program being
debugged, and checks after each instruction whether the data being
watched has changed its value. It is impossible to implement read
watchpoints this way, since there's no way to know whether the last
instruction accessed the data being watched: reading the data doesn't
change its value.
For that reason, rwatch and awatch are only available if
hardware-assisted watchpoints are available.
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2003-05-28 4:53 [ feature request ] : software watchpoints, search byte pattern Claudio Fontana
2003-05-28 15:31 ` Eli Zaretskii
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