Add GDBStub for debugging with LLDB#15

Open

MaartenS11 wants to merge 26 commits intomainfrom

feat/gdbstub

Commits on Apr 10, 2026

Add a basic gdbstub for lldb remote debugging
MaartenS11
committed
Return fewer bytes if m goes out of bounds + disable reading from type 0 memory to avoid a possible lldb issue
MaartenS11
committed
Also track the offset of the code section + adjustments to toHex to support little endian
MaartenS11
committed
Allow reading outside of code section (needs refactor, since the code section is now just the full module)
MaartenS11
committed
Seems like we just don't need the code section and the offset
MaartenS11
committed
Correctly put return addresses in the callstack
MaartenS11
committed
Implement D packet
MaartenS11
committed
Return pc register when requesting registers
MaartenS11
committed
Support pausing the execution (0x03)
MaartenS11
committed
Rename gdbstub to gdb-server and user args[1] as filename + minor cleanup
MaartenS11
committed
Use checkpoint.fidx_called to know if a primitive was called instead of metadata
MaartenS11
committed
Support sb (step back) in the gdbstub
MaartenS11
committed
Fix qWasmLocal to use only function frames as lldb expects
MaartenS11
committed
Use --port/-p to start debug server
MaartenS11
committed
Use logback and slf4j to have proper logging in the GdbStub
MaartenS11
committed
Add logback configuration that writes to stdout (DEBUG) + mio.log (TRACE)
MaartenS11
committed
Use colors for log level + don't append in file + improved log messages
MaartenS11
committed
Advertise ReverseStep+ to lldb and fix "bs" being "sb"
MaartenS11
committed
Allow stepping back by changing the step direction with QSetStepDir
MaartenS11
committed
Report a history boundary error when stepping back too far
MaartenS11
committed
Add reverse continue TODO
MaartenS11
committed
Keep connection after detach, allowing lldb to re-connect later
MaartenS11
committed

Commits on Apr 12, 2026

Send stop packet for breakpoints instead of S05
MaartenS11
committed

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

Add GDBStub for debugging with LLDB#15

Add GDBStub for debugging with LLDB#15
MaartenS11 wants to merge 26 commits intomainfrom
feat/gdbstub

Commits on Apr 10, 2026

Add a basic gdbstub for lldb remote debugging

Return fewer bytes if m goes out of bounds + disable reading from type 0 memory to avoid a possible lldb issue

Also track the offset of the code section + adjustments to toHex to support little endian

Allow reading outside of code section (needs refactor, since the code section is now just the full module)

Seems like we just don't need the code section and the offset

Correctly put return addresses in the callstack

Implement D packet

Return pc register when requesting registers

Support pausing the execution (0x03)

Rename gdbstub to gdb-server and user args[1] as filename + minor cleanup

Use checkpoint.fidx_called to know if a primitive was called instead of metadata

Support sb (step back) in the gdbstub

Fix qWasmLocal to use only function frames as lldb expects

Use --port/-p to start debug server

Use logback and slf4j to have proper logging in the GdbStub

Add logback configuration that writes to stdout (DEBUG) + mio.log (TRACE)

Use colors for log level + don't append in file + improved log messages

Advertise ReverseStep+ to lldb and fix "bs" being "sb"

Allow stepping back by changing the step direction with QSetStepDir

Report a history boundary error when stepping back too far

Add reverse continue TODO

Keep connection after detach, allowing lldb to re-connect later

Commits on Apr 12, 2026

Send stop packet for breakpoints instead of S05

Commits on Apr 13, 2026

Remove debugSourceMap from GdbStub since we no longer need it

Use config to decide if we should use the emulator or not in gdbserver mode

Minor cleanup to the GdbStub