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style: Gracefully handle errors creating shared memory UA style sheets.

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We still panic in a debug build, so that developers can notice when they
need to add a new static atom after modifying UA sheets.

We also add telemetry to note when this happens, add an app note to a
crash report, in case any crash later on occurs, and re-up the existing,
expired shared memory sheet telemetry probes so we can look at them
again.

Differential Revision: https://phabricator.services.mozilla.com/D73188
This commit is contained in:
Cameron McCormack 2020-05-11 00:11:45 +00:00 • committed by Emilio Cobos Álvarez
parent 709c52fefb
commit 6bae0b99ca
10 changed files with 184 additions and 122 deletions
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8
components/style/gecko/url.rs
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@ -18,7 +18,7 @@ use std::fmt::{self, Write};
use std::mem::ManuallyDrop;
use std::sync::RwLock;
use style_traits::{CssWriter, ParseError, ToCss};
use to_shmem::{SharedMemoryBuilder, ToShmem};
use to_shmem::{self, SharedMemoryBuilder, ToShmem};
/// A CSS url() value for gecko.
#[css(function = "url")]
@ -241,11 +241,11 @@ impl LoadDataSource {
}
impl ToShmem for LoadDataSource {
fn to_shmem(&self, _builder: &mut SharedMemoryBuilder) -> ManuallyDrop<Self> {
ManuallyDrop::new(match self {
fn to_shmem(&self, _builder: &mut SharedMemoryBuilder) -> to_shmem::Result<Self> {
Ok(ManuallyDrop::new(match self {
LoadDataSource::Owned(..) => LoadDataSource::Lazy,
LoadDataSource::Lazy => LoadDataSource::Lazy,
})
}))
}
}