A major limitation of iostream is that you can't have reads or writes
with a safe interrupt. Instead rewrite the interface with Linux ppoll so
that these can be safely interrupted with a signal and return early.
GDB has two ways to read the registers. One way is reading the full
GDBContextDefinition, which matches the layout in `BuildTargetXML`.
The other way is to read the individual elements out of
GDBContextDefinition.
These two code paths were independently implemented. Instead generate in
one location and use in either location.
NFC
This currently happens in two locations, so split it out.
There's some behaviour here where if the TID isn't found, then it
returns the ParentThread of the process. This is working around a bug in
either FEX's gdbserver or binaryninja. Leave it currently before we
figure out what's wrong.
NFC
Previous `S AA` logic is legacy for non-multithreaded applications. This
newer command gives more information about what occured and in what
thread id.
Lots going on here.
This moves OS thread object lifetime management and internal thread
state lifetime management to the frontend. This causes a bunch of thread
handling to move from the FEXCore Context to the frontend.
Looking at `FEXCore/include/FEXCore/Core/Context.h` really shows how
much of the API has moved to the frontend that FEXCore no longer needs
to manage. Primarily this makes FEXCore itself no longer need to care
about most of the management of the emulation state.
A large amount of the behaviour moved wholesale from Core.cpp to
LinuxEmulation's ThreadManager.cpp. Which this manages the lifetimes of
both the OS threads and the FEXCore thread state objects.
One feature lost was the instruction capability, but this was already
buggy and is going to be rewritten/fixed when gdbserver work continues.
Now that all of this management is moved to the frontend, the gdbserver
can start improving since it can start managing all thread state
directly.
Which requires moving LinuxEmulation to its own independent folder as
well. Since both IRLoader and FEXLoader rely on it.
No functional change, just moves the the code around.
Tony Wasserka