Re: [PATCH v2] Add autoload-breakpoints [6/6] autoload-breakpoints doc

Hui Zhu
2012-04-18T10:54:21Z

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On 04/11/12 18:54, Hui Zhu wrote:
> Hi,
>
> This patch add the doc for the autoload-breakpoints.
> The different with first version is: add introduce when target create
> autoload-breakpoints.
>
> Thanks,
> Hui
>
> 2012-04-11 Hui Zhu <hui_zhu@mentor.com>
>
> * gdb.texinfo (Setting Breakpoints): Add set breakpoint autoload.
> (Remote Serial Protocol): Add Autoload-breakpoints Format.
>

Update doc that let target remove autoload-breakpoint.

Thanks,
Hui

2012-04-18 Hui Zhu <hui_zhu@mentor.com>

* gdb.texinfo (Setting Breakpoints): Add set breakpoint autoload.
(Remote Serial Protocol): Add Autoload-breakpoints Format.

[-- Attachment #2: autoload-breakpoints-doc.txt --]
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---
doc/gdb.texinfo | 109 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 109 insertions(+)

--- a/doc/gdb.texinfo
+++ b/doc/gdb.texinfo
@@ -3772,6 +3772,40 @@ 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}.
+
+The other use case we want to support in @value{GDBN} is that inferior
+may add/set/delete breakpoints on its own, and remote stub gets
+@value{GDBN} notified, and @value{GDBN} can take some actions accordingly.
+We call these asynchronous reports about changes in the remote-side
+breakpoints @dfn{ReportAsync}.
+
+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
@@ -34216,6 +34250,7 @@ Show the current setting of the target w
* Memory Map Format::
* Thread List Format::
* Traceframe Info Format::
+* Autoload-breakpoints Format::
@end menu

@node Overview
@@ -38841,6 +38876,80 @@ 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-breakpints 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} and the stub use this packet to control
+the autoload-breakpoints in the remote. The stub will translate
+this packet through ReportAsync Packets.
+@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 create the
+breakpoint, it need insert this breakpoint with 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.
+@value{GDBN} will remove this breakpoint as it have been removed in
+the target. So when the target remove the breakpoint, it need remove
+this breakpoint with itself.
+0 means all autoload-breakpoints.
+
+@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