udebug, branch masterOpenWrt debugging helper library/servicehttps://git.openwrt.org/project/udebug/atom?h=master2026-07-08T14:09:10Zlib-ucode: avoid infinite loop on oversized trace lines2026-07-08T14:09:10ZFelix Fietkau2026-07-04T20:38:29Zurn:sha1:75843a1bfcc99019fdb9bda8cafd28dc821c2be0
A trace line longer than the 8192-byte read buffer never yields a
newline, so cur stays at the buffer start and the follow-up read of
zero bytes returns 0, spinning forever. Drop such an unterminated
full buffer to guarantee forward progress.
Signed-off-by: Felix Fietkau <nbd@nbd.name>
udebug-cli: handle kernel trace buffer open failure2026-07-08T14:09:10ZFelix Fietkau2026-07-04T20:35:31Zurn:sha1:7690e66e6e08f3bb6d4583aae09bdaa1641dae3f
trace_ring() returns null when kernel tracing is unavailable (debugfs
not mounted, insufficient privileges, tracing disabled). Calling methods
on the null result aborted the CLI with an uncaught exception; report a
clean error and honour -f instead.
Signed-off-by: Felix Fietkau <nbd@nbd.name>
lib-ucode: close trace_pipe fd on trace ring error path2026-07-04T20:34:03ZFelix Fietkau2026-07-04T20:34:03Zurn:sha1:c670cc4f9acc432eda033dd59d78c50d0c39a694
When resource creation failed after trace_pipe was opened, the error
path only closed the instance directory fd, leaking the trace_pipe
descriptor.
Signed-off-by: Felix Fietkau <nbd@nbd.name>
lib-ucode: grow trace fetch buffer to fit oversized lines2026-07-04T20:33:22ZFelix Fietkau2026-07-04T20:33:22Zurn:sha1:2fcb035141dafa996d28f54f9d10c52919ceafb3
A single doubling of data_size is not enough when one trace line is
larger than the current buffer (e.g. the first line exceeds 256 bytes),
so the following strcpy overflowed the heap allocation. Loop the growth
until the buffer can hold the accumulated data.
Signed-off-by: Felix Fietkau <nbd@nbd.name>
lib-ucode: open kernel trace_pipe non-blocking2026-07-04T20:32:34ZFelix Fietkau2026-07-04T20:32:34Zurn:sha1:7530cc1d2bb2cbf362dad4ecb10e8b6aaa6b5ba4
The trace ring registers trace_pipe with uloop and drains it in fetch()
until the read reports EAGAIN. Without O_NONBLOCK the read blocks once
the pipe is empty, stalling the whole event loop in streaming mode and
hanging a one-shot fetch indefinitely.
Signed-off-by: Felix Fietkau <nbd@nbd.name>
lib-ucode: fix heap buffer overflow in trace ring allocation2026-07-04T20:32:18ZFelix Fietkau2026-07-04T20:32:18Zurn:sha1:91591e698dac1df67c2f97d119b27927a8e42f36
The resource datasize used strlen(instance + 1), reserving two bytes
less than the strcpy of the full instance name requires, overflowing
the inline allocation.
Signed-off-by: Felix Fietkau <nbd@nbd.name>
udebug-cli: add logdump command2026-01-16T08:49:46ZFelix Fietkau2026-01-16T08:49:46Zurn:sha1:875e1a7af6ca9d86524d18169c3a79f4a1920053
Works like logstream but only dumps existing ring buffer data
without waiting for more.
Signed-off-by: Felix Fietkau <nbd@nbd.name>
udebug-cli: fix reference to invalid variable in error message2026-01-14T12:10:41ZFelix Fietkau2026-01-14T12:10:38Zurn:sha1:c5c493ed5787ca067ab1a713061ae02f0bb17046
Use the property ring_name of the ring.
Signed-off-by: Felix Fietkau <nbd@nbd.name>
add debian package support2025-10-21T13:09:54ZFelix Fietkau2025-10-21T09:48:01Zurn:sha1:75f39cd4a8067a6f0503c2f1c83c6b1af733a6f2
Signed-off-by: Felix Fietkau <nbd@nbd.name>
CMakeLists.txt: rename udebug-cli to udebug on installation2025-10-21T09:45:18ZFelix Fietkau2025-10-21T09:45:18Zurn:sha1:8c967bce23aebab7631261324680b02240e75ee1
Signed-off-by: Felix Fietkau <nbd@nbd.name>