Re: [PATCH] Autoload-breakpoints without report-async

Hui Zhu
2012-05-04T01:00:51Z

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On 05/04/12 01:02, Eli Zaretskii wrote:
>> Date: Fri, 4 May 2012 00:37:08 +0800
>> From: Hui Zhu<hui_zhu@mentor.com>
>> CC: Yao Qi<Yao_Qi@mentor.com>, Stan Shebs<stan_shebs@mentor.com>, Eli
>> Zaretskii<eliz@gnu.org>
>>
>> According to the mail form Yao. I thought make the autoload-breakpoints and report-async function together make it too hard to review. So I move the function that depend on the report-async to be a series of separate patches after report-async.
>> Then the other patches of autoload-breakpoints can be reveiw separate from report-async.
>
> Is the documentation part here any different from the last time I
> reviewed it?

Oops, I post the wrong version. The attachment is the right version. Please help me review it.

Thanks,
Hui

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---
doc/gdb.texinfo | 100 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 100 insertions(+)

--- a/doc/gdb.texinfo
+++ b/doc/gdb.texinfo
@@ -3773,6 +3773,34 @@ not support breakpoint condition evaluat
to evaluating all these conditions on the host's side.
@end table

+Prior to @value{GDBN} connects to remote stub, some breakpoints might
+have been already set in target, either by a prior @value{GDBN} session or
+by the program itself through some special system API. When @value{GDBN}
+connects to target, it should handle these existing breakpoints from
+remote stub. We call these breakpoints @dfn{auotload-breakpoints}.
+
+This feature can be controlled via the following commands:
+
+@kindex set breakpoint autoload
+@kindex show breakpoint autoload
+@table @code
+@item set breakpoint autoload query
+If this option is @samp{query} (the default), @value{GDBN} will query to user
+how to handle the autoload-breakpoints when @value{GDBN} connect to the stub.
+
+@item set breakpoint autoload merge
+If this option is @samp{merge}, the autoload-breakpoints of both @value{GDBN}
+and of the stub will be kept.
+
+@item set breakpoint autoload gdb
+If this option is @samp{gdb}, the autoload-breakpoints of stub will be removed
+when @value{GDBN} connects to stub.
+
+@item set breakpoint autoload stub
+If this option is @samp{stub}, the autoload-breakpoints of GDB will be removed
+when @value{GDBN} connects to stub.
+@end table
+

@cindex negative breakpoint numbers
@cindex internal @value{GDBN} breakpoints
@@ -34333,6 +34361,7 @@ Show the current setting of the target w
* Memory Map Format::
* Thread List Format::
* Traceframe Info Format::
+* Autoload-breakpoints Format::
@end menu

@node Overview
@@ -38936,6 +38965,77 @@ The formal DTD for the traceframe info f
length CDATA #REQUIRED>
@end smallexample

+@node Autoload-breakpoints Format
+@section Autoload-breakpoints Format
+@cindex autoload-breakpoints format
+
+@table @samp
+@item qBfP
+@itemx qBsP
+These packets request data in autoload-breakpoints base format
+about autoload-breakpoints from the stub.
+@value{GDBN} sends @code{qBfP} to get the first piece
+of data, and multiple @code{qTsP} to get additional pieces.
+
+@item @samp{QBDP}@var{autoload-breakpoints base format}
+@value{GDBN} use this packet to control the autoload-breakpoints in the remote.
+@end table
+
+Autoload-breakpoints base format describes the operation of
+the autoload-breakpoints in @value{GDBN} and the stub.
+
+@table @samp
+
+@item @var{id}@samp{:}@var{command}@samp{:}@var{addr_string}@samp{:}@var{type}@samp{:}@var{ignore_num}
+@table @samp
+@item @var{id}
+This is the id in hex string format of this command want to control.
+this command wants to control.
+0 means all autoload-breakpoints.
+@item @var{command}
+This is the command character, either @samp{E} (for ``enable'') or
+@samp{D} (for ``disable'').
+If the autoload-breakpoint @var{id} does not exist, create one and
+enable or disable it. @value{GDBN} will create this breakpoint as
+it have been created in the target. So when the target creates the
+breakpoint, it needs to insert this breakpoint by itself.
+If the autoload-breakpoint @var{id} does exist, the following items
+will be ignored, and the autoload-breakpoint will be enabled or
+disabled as specified by @var{command}.
+@item @var{addr_string}
+This is the address of an autoload-breakpoint to create, encoded
+as a hex string.
+@item @var{type}
+This is the type of the autoload-breakpoint to create, either
+@samp{H} (for ``hardware'') or @samp{S} (for ``software'').
+@item @var{ignore_num}
+This is the ignore count of the autoload-breakpoint to create,
+encoded as a hex string.
+@end table
+
+@item @var{id}@samp{:}@samp{R}
+This is the remove packet.
+@var{id} is the number of the autoload-breakpoint that this command
+wants to remove, encoded as a hex string.
+0 means all autoload-breakpoints.
+When @value{GDBN} or the target get this packet, it will delete
+the autoload-breakpoint @var{id}.
+
+@item @var{id}@samp{:}@samp{C}@samp{:}@var{cmd_str}
+This packet adds commands in @var{cmd_list} to the command list
+of the autoload-breakpoint whose number is @var{id}.
+If @var{cmd_str} is empty, the command list will be emptied.
+@var{cmd_str} is encoded as hex string.
+
+@item @var{id}@samp{:}@samp{O}@samp{:}@var{condition_str}
+This packet sets the condition of the autoload-breakpoint @var{id} to
+be as specified by @var{condition_str}.
+If @var{condition_str} is empty, the autoload-breakpoint becomes
+unconditional.
+@var{condition_str} is encoded as hex string.
+
+@end table
+
@include agentexpr.texi

@node Target Descriptions