Module util 

Widely useful small utilities.

Structs

RetryingStderr

A Write for the supervisor’s own diagnostics on fd 2 that survives a NONBLOCKING description.

Constants

STDERR_DIAGNOSTIC_DEADLINE

Total wall-clock ALL diagnostic writes in ONE PROCESS may spend waiting for a reader that is not draining. Hermit forks, so read the fork note below before treating this as the whole exit path’s budget.

Functions

init_shared_stderr_deadline_origin

Create the origin cell every hermit process of this invocation shares.

punch_out_print

A simple debugging helper function that makes it easy to printf-debug through layers of stdout/stderr caputure, such as when running under buck test/tpx.

rcbs_to_duration

A helper function to convert a number of Retired Conditional Branches (RCBS) into a std::time::Duration via the NANOS_PER_RCB defined in types.rs.

truncated

A little better than the builtin string truncation in format strings, because it includes ellipses.