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fix(rtos/zephyr): place current thread first in thread list (OCD-1334) #391

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fix(rtos/zephyr): place current thread first in thread list (OCD-1334) #391

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14 changes: 14 additions & 0 deletions src/rtos/zephyr.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1031,6 +1031,20 @@ static int zephyr_fetch_thread_list(struct rtos *rtos, uint32_t current_thread)
rtos->thread_count = (int)thread_array.elements;
rtos->thread_details = zephyr_array_detach_ptr(&thread_array);

/* Reorder thread list so current thread is first (Thread 1 in GDB).
* This fixes the issue where GDB caches live CPU registers for Thread 1
* before the thread list is populated, causing incorrect backtraces. */
td = rtos->thread_details;
for (size_t i = 1; i < (size_t)rtos->thread_count; i++) {
if (td[i].threadid == current_thread) {
struct thread_detail tmp = td[0];
td[0] = td[i];
td[i] = tmp;
LOG_DEBUG("Zephyr: moved current thread to position 0");
break;
}
}

rtos->current_thread = current_thread;

return ERROR_OK;
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