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xiaoxiang781216 pushed a commit to branch main
in repository https://gitbox.apache.org/repos/asf/nuttx-ntfc.git
The following commit(s) were added to refs/heads/main by this push:
new 3857c88 device: add kernel-mode crash signatures for user task faults
3857c88 is described below
commit 3857c882565a5ad8baa73ba4aa132409f003e4e0
Author: raiden00pl <[email protected]>
AuthorDate: Tue Aug 4 17:56:40 2026 +0200
device: add kernel-mode crash signatures for user task faults
In kernel builds a faulting user task is killed while the kernel keeps
running and the prompt returns, so the console message is the only
crash evidence; such faults were reported as command timeouts. Register
the fault messages as SEGFAULT signatures:
- 'Segmentation fault in' (risc-v)
- 'PANIC: Unhandled user exception' (arm64)
Signed-off-by: raiden00pl <[email protected]>
Assisted-by: Claude Code
---
src/ntfc/device/nuttx.py | 7 +++++++
tests/device/test_nuttx.py | 16 ++++++++++++++++
2 files changed, 23 insertions(+)
diff --git a/src/ntfc/device/nuttx.py b/src/ntfc/device/nuttx.py
index a12cc94..6d40ef9 100644
--- a/src/ntfc/device/nuttx.py
+++ b/src/ntfc/device/nuttx.py
@@ -51,6 +51,13 @@ class DeviceNuttx(OSCommon):
b"up_dump_register",
b"dump_tasks",
],
+ # kernel-mode (CONFIG_BUILD_KERNEL) user task faults: the kernel
+ # kills the offending task and keeps running, so the console
+ # message is the only crash evidence
+ CrashType.SEGFAULT: [
+ b"Segmentation fault in",
+ b"PANIC: Unhandled user exception",
+ ],
}
_PANIC_CHAR = r"/"
diff --git a/tests/device/test_nuttx.py b/tests/device/test_nuttx.py
index dd90df5..0275236 100644
--- a/tests/device/test_nuttx.py
+++ b/tests/device/test_nuttx.py
@@ -43,6 +43,22 @@ def test_device_nuttx_init():
assert CrashType.ASSERTION in sigs
assert all(isinstance(v, list) for v in sigs.values())
+ # kernel-mode user task faults kill only the task; the console
+ # message is the only crash evidence
+ assert CrashType.SEGFAULT in sigs
+ assert b"Segmentation fault in" in sigs[CrashType.SEGFAULT]
+ assert b"PANIC: Unhandled user exception" in sigs[CrashType.SEGFAULT]
+
+ # real rv-virt knsh64 console output is classified as SEGFAULT
+ from ntfc.device.state import DeviceStateManager
+
+ mgr = DeviceStateManager(crash_signatures=sigs)
+ line = (
+ b"[ 2.966000] riscv_fault_handler: "
+ b"Segmentation fault in getprime (PID 4: getprime)"
+ )
+ assert mgr._detect_crash_type(line) is CrashType.SEGFAULT
+
config.kv_check.return_value = 0
assert d.panic_char == ""
config.kv_check.return_value = 1
