src-test/usr.bin/truss, branch main

truss: Add AIO syscalls.

2020-12-10T07:13:15Z

Display the arguments of aio_read(2), aio_write(2), aio_suspend(2), aio_error(2), aio_return(2), aio_cancel(2), aio_fsync(2), aio_mlock(2), aio_waitcomplete(2) and lio_listio(2) in human-readable form. Reviewed by: asomers Differential Revision: https://reviews.freebsd.org/D27518

kdump/truss: decode new _umtx_op flags

2020-12-09T03:24:09Z

In both cases, print the flag bits first followed by the command. Output now looks something like this: (ktrace) _umtx_op(0x8605f7008,0xf,0,0,0) _umtx_op(0x9fffdce8,0x80000003,0x1,0,0) (truss) _umtx_op(0x7fffffffda50,UMTX_OP_WAKE,0x1,0x0,0x0) = 0 (0x0) _umtx_op(0x9fffdd08,UMTX_OP__32BIT|UMTX_OP_WAKE,0x1,0x0,0x0) = 0 (0x0) Reviewed by: kib Differential Revision: https://reviews.freebsd.org/D27325

Enable iterating all sysctls, even ones with CTLFLAG_SKIP

2020-10-05T20:13:22Z

Add an "nextnoskip" sysctl that allows for listing of sysctls intended to be normally skipped for cost reasons. This makes it so the names/descriptions of those sysctls can be discovered with sysctl -aN/sysctl -ad/sysctl -at. It also makes it so children are visited when a node flagged with CTLFLAG_SKIP is explicitly requested. The intended use case is to mark the root "kstat" node with CTLFLAG_SKIP so that the extensive and expensive stats are skipped by default but may still be easily obtained without having to know them all (which may not even be possible) and request each one-by-one. Reviewed by: jhb MFC after: 2 weeks Relnotes: yes Sponsored by: iXsystems, Inc. Differential Revision: https://reviews.freebsd.org/D26560

truss: print more information about traced sysctls

2020-07-05T19:53:54Z

MFC after: 2 weeks Sponsored by: Mysterious Code Ltd.

Decode the file descriptor argument to closefrom(2) as an Integer.

2020-05-21T02:10:45Z

This is consistent with what we are doing for close(2) and it makes it a bit easier to follow when debugging file descriptor operations. i.e. many other syscalls are decoding fds as integers rather than base 16 numbers. MFC after: 1 week

vfs: add realpathat syscall

2020-02-20T16:58:19Z

realpath(3) is used a lot e.g., by clang and is a major source of getcwd and fstatat calls. This can be done more efficiently in the kernel. This works by performing a regular lookup while saving the name and found parent directory. If the terminal vnode is a directory we can resolve it using usual means. Otherwise we can use the name saved by lookup and resolve the parent. See the review for sample syscall counts. Reviewed by: kib Differential Revision: https://reviews.freebsd.org/D23574

truss: fix shm_open2 oversight (BinString -> Name)

2020-02-19T15:12:01Z

BinString assumes a length in the next argument; Name is more appropriate for the final argument.

truss: decode shm_open2

2020-02-19T14:54:33Z

shm_open2 is similar to shm_open, except it also takes shmflags and optional name to label the anonymous region for, e.g., debugging purposes. The appropriate support for decoding shmflags was added to libsysdecode in r358115. This is a part of D23733. Reviewed by: kaktus

Miscellaneous typo fixes

2020-02-07T19:53:07Z

Submitted by: Gordon Bergling Differential Revision: https://reviews.freebsd.org/D23453

truss: centralize pointer-constructing casts.

2019-10-31T22:29:13Z

In nearly all cases, the caller has a uintptr_t compatible argument so this eliminates a large number of casts. Add a print_pointer function to centralize printing pointers. Reviewed by: jhb Obtained from: CheriBSD Sponsored by: DARPA, AFRL Differential Revision: https://reviews.freebsd.org/D22212