zyfeier opened a new pull request, #18936:
URL: https://github.com/apache/nuttx/pull/18936
## Summary
* Why: TriCore architecture lacks hardware debug support in NuttX,
making on-chip breakpoint/watchpoint functionality unavailable for
debugging applications.
* What: Implement the standard NuttX debugpoint API
(up_debugpoint_add/remove) for TriCore using Trigger Event (TREVT)
registers.
* How: Use 8 TREVT register pairs (address + event config) to support
hardware breakpoints and read/write/read-write watchpoints. A debug
monitor exception handler (DMS) dispatches callbacks when trigger
events fire.
## Impact
* Is new feature added? YES (hardware debug breakpoint/watchpoint for
TriCore)
* Impact on user (will user need to adapt to change)? NO
* Impact on build (will build process change)? NO
* Impact on hardware (will arch(s) / board(s) / driver(s) change)? YES
(arch/tricore only)
* Impact on documentation (is update required / provided)? NO
* Impact on security (any sort of implications)? NO
* Impact on compatibility (backward/forward/interoperability)? NO
## Testing
I confirm that changes are verified on local setup and works as intended:
* Build Host(s): Linux x86_64, GCC 11.3.1 (tricore-elf-gcc)
* Target(s): tricore, triboard_tc4x9_com:nsh
Testing logs (build):
```
LD: nuttx
```
Testing logs (runtime, debugpoint):
```
Testing breakpoints
==== Calling test_function ====
Add breakpoint at 0x8002ff92
Calling test_trigger
Pass: Breakpoint at 0x8002ff92 triggered
==== Calling test_data ====
Add read watchpoint at 0x8000e094
Pass: Read watchpoint at 0x8000e094 triggered
==== Calling test_data ====
Add read watchpoint at 0x90022cd4
Pass: Read watchpoint at 0x90022cd4 triggered
==== Calling test_data ====
Add write watchpoint at 0x90022cd4
Pass: Write watchpoint at 0x90022cd4 triggered
==== Calling test_data ====
Add read/write watchpoint at 0x90022cd4
Pass: Read watchpoint at 0x90022cd4 triggered
Pass: Write watchpoint at 0x90022cd4 triggered
```
Testing logs (runtime, ostest):
```
ostest_main: Exiting with status 0
```
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