Configure the lmdb-rkv-sys Rust crate to use a smaller MDB_IDL_LOGN size in order to reduce allocations when opening an LMDB environment in read-write mode.
@glandium I adopted the configuration strategy you suggested of creating a "feature" for each reasonable value for the MDB_IDL_LOGN macro. Fortunately, the range of reasonable values is fairly small.
@nanj Based on your evalution in https://github.com/mozilla/lmdb/pull/2, a value of "9" for this macro should aggressively reduce the allocations while still supporting our existing use cases. But I'm open to increasing it, if you think a higher initial value would be preferable.
Differential Revision: https://phabricator.services.mozilla.com/D27559
This is needed for cross-language LTO (bug 1512723). We don't want to block on waiting for 1.34's release, so we'll get a head start now, but we'll update to the final 1.34 release when available. Rust Forge estimates the release at 11 April.
Differential Revision: https://phabricator.services.mozilla.com/D25851
This commit introduces a Rust XPCOM component,
`mozISyncedBookmarksMerger`, that wraps the Dogear crate for
merging and applying synced bookmarks.
How this works: `SyncedBookmarksMirror.jsm` manages opening
the connection, initializing the schema, and writing incoming
items into the mirror database. The new `mozISyncedBookmarksMerger`
holds a handle to the same connection. When JS code calls
`mozISyncedBookmarksMerger::apply`, the merger builds local and
remote trees, produces a merged tree, applies the tree back to Places,
and stages outgoing items for upload in a temp table, all on the
storage thread. It then calls back in to JS, which inflates Sync
records for outgoing items, notifies Places observers, and cleans up.
Since Dogear has a more robust merging algorithm that attempts to fix
up invalid trees, `test_bookmark_corruption.js` intentionally fails.
This is fixed in the next commit, which changes the merger to handle
invalid structure.
Differential Revision: https://phabricator.services.mozilla.com/D20076
This commit wraps just enough of the mozStorage API to support the
bookmarks mirror. It's not complete: for example, there's no way
to open, clone, or close a connection, because the mirror handles
that from JS. The wrapper also omits shutdown blocking and retrying on
`SQLITE_BUSY`.
This commit also changes the behavior of sync and async mozStorage
connections. Async (`mozIStorageAsyncConnection`) methods may be called
from any thread on any connection. Sync (`mozIStorageConnection`)
methods may be called from any thread on a sync connection, and from
background threads on an async connection. All connections now QI
to `mozIStorageConnection`, but attempting to call a sync method on
an async connection from the main thread throws.
Finally, this commit exposes an `OpenedConnection::unsafeRawConnection`
getter in Sqlite.jsm, for JS code to access the underlying connection.
Differential Revision: https://phabricator.services.mozilla.com/D20073
This introduces features in the jsrust crate, so we can enable/disable
compilation for a specific platform at compile-time. It also does only select
the architecture targeted by the JIT, which should result in slightly lower
compilation times on every platform, and lower binary sizes too.
Differential Revision: https://phabricator.services.mozilla.com/D22280
This introduces features in the jsrust crate, so we can enable/disable
compilation for a specific platform at compile-time. It also does only select
the architecture targeted by the JIT, which should result in slightly lower
compilation times on every platform, and lower binary sizes too.
Differential Revision: https://phabricator.services.mozilla.com/D22280
Until rust 1.28, there was no stable way to change the allocator used by
rust code. In bug 1280578, we hooked HeadAlloc/HeapFree/HeapRealloc,
that the default rust system allocator uses. On other platforms, rust
code just ended up using malloc/free/realloc like everything else.
As of rust 1.28, though, it is now possible to use the GlobalAlloc trait
and the #[global_allocator] attribute to set an allocator. On Windows,
this can allow us to hook mozjemalloc directly, rather than using an
indirection through HeapAlloc/etc. (which require an extra call to
GetProcessHeap), so let's do this. On other platforms, this just ends up
doing the same thing as the default rust system allocator (except for
the memalign limit on 32-bits platforms).
We still need the HeapAlloc/etc. hooks for some C++ code using it, though.
Another benefit is that the HeapAlloc GlobalAlloc implementation needs
to do its own memalign, which it does by overallocating and aligning
manually. We obviously don't need to do this when we using
memalign/_aligned_malloc directly.
Differential Revision: https://phabricator.services.mozilla.com/D14820
This removes the code added in bug 1458161, because the old versions of
rust that required it can't be used to build Gecko anymore. The variant
for newer versions of rust stays.
Differential Revision: https://phabricator.services.mozilla.com/D14528
The current rust panic hook keeps a string for the crash reporter, and
goes on calling the default rust panic hook, which prints out a crash
stack... when RUST_BOOTSTRAP is set *and* when that works. Notably, on
both mac and Windows, it only really works for local builds, but fails
for debug builds from automation, although on automation itself, we also
do stackwalk from crash minidumps, which alleviates the problem.
Artifact debug builds are affected, though.
More importantly, C++ calls to e.g. MOZ_CRASH have a similar but
different behavior, in that they dump a stack trace on debug builds, by
default (with exceptions, see below for one). The format of those stack
traces is understood by the various fix*stack*py scripts under
tools/rb/, that are used by the various test harnesses both on
automation and locally.
Additionally, the current rust panic hook, as it calls the default rust
panic hook, ends up calling abort() on non-Windows platforms, which ends
up being verbosely redirected to mozalloc_abort per
https://dxr.mozilla.org/mozilla-central/rev/237e4c0633fda8e227b2ab3ab57e417c980a2811/memory/mozalloc/mozalloc_abort.cpp#79
which then calls MOZ_CRASH. Theoretically, /that/ would also print a
stack trace, but doesn't because currently the stack trace printing code
lives in libxul, and MOZ_CRASH only calls it when compiled from
libxul-code, which mozalloc_abort is not part of.
With this change, we make the rust panic handler call back into
MOZ_CRASH directly. This has multiple advantages:
- This is more consistent cross-platforms (Windows is not special
anymore).
- This is more consistent between C++ and rust (stack traces all look
the same, and can all be post-processed by fix*stack*py if need be)
- This is more consistent in behavior, where debug builds will show
those stack traces without caring about environment variables.
- It demangles C++ symbols in rust-initiated stack traces (for some
reason that didn't happen with the rust panic handler)
A few downsides:
- the loss of demangling for some rust symbols.
- the loss of addresses in the stacks, although they're not entirely
useful
- extra empty lines.
The first should be fixable later one. The latter two are arguably
something that should be consistent across C++ and rust, and should be
changed if necessary, independently of this patch.
Depends on D11719
Depends on D11719
Differential Revision: https://phabricator.services.mozilla.com/D11720
The current rust panic hook keeps a string for the crash reporter, and
goes on calling the default rust panic hook, which prints out a crash
stack... when RUST_BOOTSTRAP is set *and* when that works. Notably, on
both mac and Windows, it only really works for local builds, but fails
for debug builds from automation, although on automation itself, we also
do stackwalk from crash minidumps, which alleviates the problem.
Artifact debug builds are affected, though.
More importantly, C++ calls to e.g. MOZ_CRASH have a similar but
different behavior, in that they dump a stack trace on debug builds, by
default (with exceptions, see below for one). The format of those stack
traces is understood by the various fix*stack*py scripts under
tools/rb/, that are used by the various test harnesses both on
automation and locally.
Additionally, the current rust panic hook, as it calls the default rust
panic hook, ends up calling abort() on non-Windows platforms, which ends
up being verbosely redirected to mozalloc_abort per
https://dxr.mozilla.org/mozilla-central/rev/237e4c0633fda8e227b2ab3ab57e417c980a2811/memory/mozalloc/mozalloc_abort.cpp#79
which then calls MOZ_CRASH. Theoretically, /that/ would also print a
stack trace, but doesn't because currently the stack trace printing code
lives in libxul, and MOZ_CRASH only calls it when compiled from
libxul-code, which mozalloc_abort is not part of.
With this change, we make the rust panic handler call back into
MOZ_CRASH directly. This has multiple advantages:
- This is more consistent cross-platforms (Windows is not special
anymore).
- This is more consistent between C++ and rust (stack traces all look
the same, and can all be post-processed by fix*stack*py if need be)
- This is more consistent in behavior, where debug builds will show
those stack traces without caring about environment variables.
- It demangles C++ symbols in rust-initiated stack traces (for some
reason that didn't happen with the rust panic handler)
A few downsides:
- the loss of demangling for some rust symbols.
- the loss of addresses in the stacks, although they're not entirely
useful
- extra empty lines.
The first should be fixable later one. The latter two are arguably
something that should be consistent across C++ and rust, and should be
changed if necessary, independently of this patch.
Depends on D11719
Differential Revision: https://phabricator.services.mozilla.com/D11720
The current rust panic hook keeps a string for the crash reporter, and
goes on calling the default rust panic hook, which prints out a crash
stack... when RUST_BOOTSTRAP is set *and* when that works. Notably, on
both mac and Windows, it only really works for local builds, but fails
for debug builds from automation, although on automation itself, we also
do stackwalk from crash minidumps, which alleviates the problem.
Artifact debug builds are affected, though.
More importantly, C++ calls to e.g. MOZ_CRASH have a similar but
different behavior, in that they dump a stack trace on debug builds, by
default (with exceptions, see below for one). The format of those stack
traces is understood by the various fix*stack*py scripts under
tools/rb/, that are used by the various test harnesses both on
automation and locally.
Additionally, the current rust panic hook, as it calls the default rust
panic hook, ends up calling abort() on non-Windows platforms, which ends
up being verbosely redirected to mozalloc_abort per
https://dxr.mozilla.org/mozilla-central/rev/237e4c0633fda8e227b2ab3ab57e417c980a2811/memory/mozalloc/mozalloc_abort.cpp#79
which then calls MOZ_CRASH. Theoretically, /that/ would also print a
stack trace, but doesn't because currently the stack trace printing code
lives in libxul, and MOZ_CRASH only calls it when compiled from
libxul-code, which mozalloc_abort is not part of.
With this change, we make the rust panic handler call back into
MOZ_CRASH directly. This has multiple advantages:
- This is more consistent cross-platforms (Windows is not special
anymore).
- This is more consistent between C++ and rust (stack traces all look
the same, and can all be post-processed by fix*stack*py if need be)
- This is more consistent in behavior, where debug builds will show
those stack traces without caring about environment variables.
- It demangles C++ symbols in rust-initiated stack traces (for some
reason that didn't happen with the rust panic handler)
A few downsides:
- the loss of demangling for some rust symbols.
- the loss of addresses in the stacks, although they're not entirely
useful
- extra empty lines.
The first should be fixable later one. The latter two are arguably
something that should be consistent across C++ and rust, and should be
changed if necessary, independently of this patch.
Depends on D11719
Differential Revision: https://phabricator.services.mozilla.com/D11720
Updating rkv to 0.5 enables us to un-vendor new-ordered-float, as rkv 0.4 is the last crate in the tree that depends on it.
It also enables us to un-vendor version 0.5 of uuid. We previously needed that version because multiple third-party crates depended on it, and we have limited control over third-party sub-dependencies. But rkv 0.4 was the last third-party crate that still depended on version 0.5 of uuid; rkv 0.5 depends on version 0.6 of uuid.
There would still be two internal crates that depend on version 0.5 of uuid: geckodriver and webrender_bindings. But we have more control over internal sub-dependencies, and we can update those two internal crates to depend on version 0.6 of uuid. This patch does so.
To summarize, this patch makes the following changes:
* rkv: 0.4 -> 0.5
* new-ordered-float: un-vendored
* geckodriver: uuid dependency 0.5 -> 0.6
* webrender_bindings: uuid dependency 0.5 -> 0.6
* uuid 0.5: un-vendored
* uuid 0.6: remains in tree
Differential Revision: https://phabricator.services.mozilla.com/D9160
This introduces two new crates:
- jsrust, for standalone builds. This crate is compiled into a static library
libjsrust.a, which gets linked into the shared Spidermonkey library when it's
built, or into the static Spidermonkey library otherwise. This is just a
static library wrapping jsrust_shared below.
- jsrust_shared, for Gecko embedding. It just references other Rust
crates actively used in Spidermonkey. It is used to be embedded as part of
a new Rust dependency in Gecko (in gkrust).
When I originally implemented bug 1458161, this is how it was done, but
it was suggested to use a configure-time check. This turned out to not
be great, because the rust compiler changes regularly, and we don't run
the configure tests when the version changes. When people upgraded their
rust compiler to 1.27, the code subsequently failed to build because the
features were still set for the previous version they had installed.
Bug 1458161 added a rust OOM handler based on an unstable API that was
removed in 1.27, replaced with something that didn't allow to get the
failed allocation size.
Latest 1.28 nightly (2018-06-13) has
https://github.com/rust-lang/rust/pull/50880,
https://github.com/rust-lang/rust/pull/51264 and
https://github.com/rust-lang/rust/pull/51241 merged, which allow to
hook the OOM handler and get the failed allocation size again.
Because this is still an unstable API, we explicitly depend on strict
versions of rustc. We also explicitly error out if automation builds
end up using a rustc version that doesn't allow us to get the allocation
size for rust OOM, because we don't want that to happen without knowing.
Update mp4parse-rust to 0c8e1d91464aaa63b82ebf076b63cda1df4230d1, which adds
uuid parsing support and exports the mp4parse_fallible feature from
mp4parse_capi.
Update gkrust to pass MOZ_MEMORY as a feature, and use that to conditionally
enable mp4parse_fallible/FallibleVec.
MozReview-Commit-ID: 2HDYbL2CGgJ
