[lldb-dev] NativeProcessProtocol breakpoint setting

[Todd Fiala]

Great, thanks Greg!


On Mon, Mar 24, 2014 at 10:59 AM, Greg Clayton <gclayton at apple.com> wrote:

> This size is primarily for ARM and Thumb breakpoints. The
> NativeProcessProtocol and NativeThreadProtocol protocol will be "I will do
> exactly what you tell me" and they shouldn't need to know how to dig
> through the object files to find the CPU map that shows exactly which
> addresses are ARM and which are Thumb. Sending the size field of 2 (for
> Thumb) and 4 (for ARM) helps the protocol to do its job. Most architectures
> will only have 1 size that is used (1 byte for x86 and x86_64 and 4 for
> PowerPC, etc). So this can mostly be ignored for non ARM targets.
>
> In debugserver, the Z packets that set the breakpoints specify the size.
>
> Greg
>
> On Mar 24, 2014, at 10:33 AM, Todd Fiala <tfiala at google.com> wrote:
>
> > Hey Greg,
> >
> > For this method in NativeProcessProtocol:
> >
> >         virtual Error
> >         SetBreakpoint (lldb::addr_t addr, size_t size, bool hardware);
> >
> > What exactly is the size meant to represent?
> >
> > Also, is this method meant to be able to succeed if the breakpoint
> address isn't yet loaded, or should it fail if the address isn't loaded yet
> and assume that the caller would be watching for module load events and
> handle buffering breakpoints until the address is available?
> >
> > Can you point me to where debugserver implements the equivalent?
> >
> > Thanks!
> > --
> > Todd Fiala |    Software Engineer |    tfiala at google.com |
> 650-943-3180
> >
>
>


-- 
Todd Fiala | Software Engineer | tfiala at google.com | 650-943-3180
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