Since the HIO request is basically treated like a syscall, we need to
stop emulation while waiting for the GDB client to reply with the
result. This ensures any memory queries etc. that GDB makes to fulfill
the HIO request are accessing memory as it was at the time of the
request, instead of afterwards.
This also does kind of a hacky way of sending HIO requests, since we
don't have a direct way of signaling a request should be sent like the
Rosalina implementation.
To improve this, it could probably do some kind of signal sending which
the main run loop handles instead of GDBStub::HandlePacket();
Follows the video core PR. fmt doesn't require casts for enum classes
anymore, so we can remove quite a few casts.
Co-Authored-By: LC <712067+lioncash@users.noreply.github.com>
1. Ensure that register information available to gdbstub is most up-to-date.
2. There's no reason to check for current_thread == thread when emitting a trap.
Doing this results in random hangs whenever a step happens upon a thread switch.
* Core::Timing: Add multiple timer, one for each core
* revert clang-format; work on tests for CoreTiming
* Kernel:: Add support for multiple cores, asserts in HandleSyncRequest because Thread->status == WaitIPC
* Add some TRACE_LOGs
* fix tests
* make some adjustments to qt-debugger, cheats and gdbstub(probably still broken)
* Make ARM_Interface::id private, rework ARM_Interface ctor
* ReRename TimingManager to Timing for smaler diff
* addressed review comments
* gdbstub: fix IsMemoryBreak() returning false while connected to client
As a result, the only existing codepath for a memory watchpoint hit to break into GDB (InterpeterMainLoop, GDB_BP_CHECK, ARMul_State::RecordBreak) is finally taken,
which exposes incorrect logic* in both RecordBreak and ServeBreak.
* a blank BreakpointAddress structure is passed, which sets r15 (PC) to NULL
* gdbstub: DynCom: default-initialize two members/vars used in conditionals
* gdbstub: DynCom: don't record memory watchpoint hits via RecordBreak()
For now, instead check for GDBStub::IsMemoryBreak() in InterpreterMainLoop and ServeBreak.
Fixes PC being set to a stale/unhit breakpoint address (often zero) when a memory watchpoint (rwatch, watch, awatch) is handled in ServeBreak() and generates a GDB trap.
Reasons for removing a call to RecordBreak() for memory watchpoints:
* The``breakpoint_data`` we pass is typed Execute or None. It describes the predicted next code breakpoint hit relative to PC;
* GDBStub::IsMemoryBreak() returns true if a recent Read/Write operation hit a watchpoint. It doesn't specify which in return, nor does it trace it anywhere. Thus, the only data we could give RecordBreak() is a placeholder BreakpointAddress at offset NULL and type Access. I found the idea silly, compared to simply relying on GDBStub::IsMemoryBreak().
There is currently no measure in the code that remembers the addresses (and types) of any watchpoints that were hit by an instruction, in order to send them to GDB as "extended stop information."
I'm considering an implementation for this.
* gdbstub: Change an ASSERT to DEBUG_ASSERT
I have never seen the (Reg[15] == last_bkpt.address) assert fail in practice, even after several weeks of (locally) developping various branches around GDB. Only leave it inside Debug builds.
Rather than having to type out the full std::map type signature, we can
just use a straightforward alias. While we're at it, rename
GetBreakpointList to GetBreakpointMap, which makes the name more
accurate. We can also get rid of unnecessary u64 static_casts, since
VAddr is an alias for a u64.
- Can be used in either DynCom or Dynarmic mode
- Added support for threads
- Proper support for FPU registers
- Fix for NibbleToHex conversion that used to produce false error codes
- Fix for clang-format failing under Windows
Corrects a few issues with regards to Doxygen documentation, for example:
- Incorrect parameter referencing.
- Missing @param tags.
- Typos in @param tags.
and a few minor other issues.
Currently, this is only ever queried, so adding a function to check if the
server is enabled is more sensible.
If directly modifying this externally is ever desirable, it should be done
by adding a function to the interface, rather than exposing implementation
details directly.
