tmedicci opened a new pull request, #13546:
URL: https://github.com/apache/nuttx/pull/13546
## Summary
* Documentation: Document stack and backtrace dump for Espressif SoCs
- Stack and backtrace dump for Espressif's SoCs (ESP32, ESP32-S2,
ESP32-S3, ESP32-C3, ESP32-C6 and ESP32-H2) is now documented in a new section
for each chip entry page.
* xtensa/esp32[|s2|s3]: Fix task backtrace dump
- Fix `MAKE_PC_FROM_RA` macro to consider the instruction region base
address;
- Add sanity check for calculated PC and SP registers;
- Check if the stack pointer is within the interrupt stack to enable
backtrace dump if an exception occurs during the ISR;
- Update the script for decoding the backtrace dump to consider the syntax
of the backtrace format and properly handle the dump when SMP is enabled;
* xtensa/Kconfig: Fix dependency for backtrace dump on Xtensas
- `CONFIG_XTENSA_INTBACKTRACE` is necessary to enable backtrace dump for
the tasks because exceptions are treated like interrupts (even when an
exception occurs during a normal task execution). It's now automatically
selected when `CONFIG_SCHED_BACKTRACE` is enabled. This commit also removes
outdated Kconfig options.
## Impact
Fix backtrace dump on assertions considering assertions triggered by tasks
or during an interrupt service.
## Testing
Internal CI testing with HW on all Xtensa-based devices.
### How to Test on ESP32:
Use `esp32-devkitc:nsh`. Enable `CONFIG_SCHED_BACKTRACE` and
`CONFIG_SYSTEM_DUMPSTACK`. On nsh, run `dumpstack`:
```
nsh> dumpstack
sched_dumpstack: backtrace| 2: 0x400ee9bc 0x400ef817 0x400e2d0b 0x400e1d63
0x40000000
```
Save this output to a file and use `./tools/espressif/btdecode.sh esp32
/tmp/backtrace.txt` to check the backtrace dump:
```
./tools/espressif/btdecode.sh esp32 /tmp/backtrace.txt
Backtrace for task 2:
0x400ee9bc: sched_dumpstack at ??:?
0x400ef817: dumpstack_main at ??:?
0x400e2d0b: nxtask_startup at ??:?
0x400e1d63: nxtask_start at ??:?
0x40000000: ?? ??:0
```
Before this PR, the output would generate wrong addresses:
```
Backtrace for task 2:
0x000ee998: ?? ??:0
0x000ef7f3: ?? ??:0
0x000e2ce7: ?? ??:0
0x000e1d3f: ?? ??:0
```
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