Re: GDB reading eh_frame/eh_frame_hdr from disk

The command:

set trust-readonly-sections [on|off]

toggles reading from memory vs reading from disk. The default is off, so
unless you have a weird target or a strange script, you should be getting
it from memory already. But it isn't hard to change to see if that fixes
your problem.



On Mon, Jun 22, 2020 at 11:08 AM Simon Marchi <[email protected]> wrote:

> On 2020-06-18 6:37 p.m., Mitch Souders wrote:
> > Is there any way to tell gdb to use the in-memory representation from the
> > inferior of the .eh_frame/.eh_frame_hdr sections when doing stack
> > unwinding? As best I can determine, gdb always reaches out to disk to
> find
> > .eh_frame/.eh_frame_hdr to do stack unwinding. Our product is doing some
> > runtime manipulation of these sections and gdb's current behavior is
> > undesired.
>
> If the section is allocated in the process, then I'd expect GDB to read
> it from memory (when there's a process).  You would need to step into
> GDB when it's doing one such read to see which target ends up handling
> the memory read.
>
> Simon
>