libsydtime 0.0.4

Rust-based C LD_PRELOAD library to replace vDSO time calls with syscalls
Documentation
  • Coverage
  • 80%
    4 out of 5 items documented0 out of 4 items with examples
  • Size
  • Source code size: 5.83 kB This is the summed size of all the files inside the crates.io package for this release.
  • Documentation size: 1.16 MB This is the summed size of all files generated by rustdoc for all configured targets
  • Ø build duration
  • this release: 11s Average build duration of successful builds.
  • all releases: 11s Average build duration of successful builds in releases after 2024-10-23.
  • Links
  • Homepage
  • Repository
  • crates.io
  • Dependencies
  • Versions
  • Owners
  • alip sardemff7

libsydtime is a LD_PRELOAD library to replace vDSO time calls with system calls. This library is meant as a complement to syd's trace/deny_tsc sandbox command.

To install from source, clone the repository at https://git.sr.ht/~alip/syd, change into the directory time and run make, make test and doas make install. The only prerequisite is Rust 1.56.1 or later.

Below is a simple example of how to use libsydtime with syd:

$ strace -qf -e%clock syd -ppaludis -mtrace/deny_tsc:1 -eLD_PRELOAD=/usr/local/lib/libsydtime.so date
[pid 27095] clock_gettime(CLOCK_REALTIME, {tv_sec=1706186439, tv_nsec=28829866}) = 0
Thu Jan 25 12:40:39 UTC 2024
[pid 27095] +++ exited with 0 +++
$ strace -qf -e%clock syd -ppaludis date # vDSO
Thu Jan 25 12:41:25 UTC 2024
[pid 27103] +++ exited with 0 +++
$ strace -qf -e%clock syd -ppaludis -mtrace/deny_tsc:1 date # vDSO not permitted
[pid 27113] --- SIGSEGV {si_signo=SIGSEGV, si_code=SI_KERNEL, si_addr=NULL} ---
[pid 27113] +++ killed by SIGSEGV +++
$

Maintained by Ali Polatel. Up-to-date sources can be found at https://git.sr.ht/~alip/syd and bugs/patches can be submitted by email to ~alip/sydbox-devel@lists.sr.ht.