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| author | Mark Salyzyn <salyzyn@google.com> | 2018-03-19 15:16:29 -0700 |
|---|---|---|
| committer | Mark Salyzyn <salyzyn@google.com> | 2018-03-20 13:11:44 -0700 |
| commit | 39cc3e70734779503db0ddaf2a6fe604cac08f8d (patch) | |
| tree | 24f3584ed6bea079b8c5c598f59920ccb25b1f6e /libutils/Unicode.cpp | |
| parent | 855d205817f642652d0944a3002ec977d5a47e4f (diff) | |
bootstat: allow kernel_panic,sysrq to propagate subreason
Allow for a daemon to write to last kmsg to propagate a detailed
subreason to kernel_panic,sysrq actions. A minor refactor moves
common code into a helper function getSubreason for retrieval and
bit error correction operations.
A sysrq crash generally produces a kernel-provided message:
SysRq : Trigger a crash
which is used to generate a canonical boot reason kernel_panic,sysrq.
A user daemon could write to /dev/kmsg just prior to the sysrq with
SysRq : Trigger a crash : '<subreason>'
to change the canonical boot reason to kernel_panic,sysrq,<subreason>.
Administration added pending kBootReasonMap entries present in TRON.
Test: manual echo into /dev/kmsg and /proc/sysrq-trigger and check
Test: boot_reason_test.sh
Bug: 33808187
Bug: 63736262
Change-Id: Ibf5432737e5a3449ebe40a8c6cf2d3e912ed6bbc
Diffstat (limited to 'libutils/Unicode.cpp')
0 files changed, 0 insertions, 0 deletions