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[fuchsia] Propagate the userspace UTC clock

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On Fuchsia, spawning a subprocess does not automatically
clone all of the parent process' capabilities. UTC time on
Fuchsia is managed by a top-level userspace clock capability
that is cloned and passed to subprocesses.

This change ensures that any Rust subprocess gets access to the
UTC clock, if the parent had access to it. This is critical for
tests, which on Fuchsia, use panic=abort and spawn subprocesses
per test.
This commit is contained in:
Adam Lesinski 2020-09-15 13:54:46 -07:00
parent a874956d94
commit fafb2e9de7
2 changed files with 3 additions and 1 deletions
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3
library/std/src/sys/unix/process/process_fuchsia.rs
View File

@ -118,7 +118,8 @@ impl Command {
FDIO_SPAWN_CLONE_JOB
| FDIO_SPAWN_CLONE_LDSVC
| FDIO_SPAWN_CLONE_NAMESPACE
| FDIO_SPAWN_CLONE_ENVIRON, // this is ignored when envp is non-null
| FDIO_SPAWN_CLONE_ENVIRON // this is ignored when envp is non-null
| FDIO_SPAWN_CLONE_UTC_CLOCK,
self.get_program().as_ptr(),
self.get_argv().as_ptr(),
envp,

1
library/std/src/sys/unix/process/zircon.rs
View File

@ -138,6 +138,7 @@ pub const FDIO_SPAWN_CLONE_LDSVC: u32 = 0x0002;
pub const FDIO_SPAWN_CLONE_NAMESPACE: u32 = 0x0004;
pub const FDIO_SPAWN_CLONE_STDIO: u32 = 0x0008;
pub const FDIO_SPAWN_CLONE_ENVIRON: u32 = 0x0010;
pub const FDIO_SPAWN_CLONE_UTC_CLOCK: u32 = 0x0020;
pub const FDIO_SPAWN_CLONE_ALL: u32 = 0xFFFF;
// fdio_spawn_etc actions