gecko-dev/servo/components/url
Nicholas Nethercote 5a62942911 servo: Merge #18938 - Replace all uses of the heapsize crate with malloc_size_of (from nnethercote:bug-1409255); r=SimonSapin
Servo currently uses `heapsize`, but Stylo/Gecko use `malloc_size_of`.
`malloc_size_of` is better -- it handles various cases that `heapsize` does not
-- so this patch changes Servo to use `malloc_size_of`.

This patch makes the following changes to the `malloc_size_of` crate.

- Adds `MallocSizeOf` trait implementations for numerous types, some built-in
  (e.g. `VecDeque`), some external and Servo-only (e.g. `string_cache`).

- Makes `enclosing_size_of_op` optional, because vanilla jemalloc doesn't
  support that operation.

- For `HashSet`/`HashMap`, falls back to a computed estimate when
  `enclosing_size_of_op` isn't available.

- Adds an extern "C" `malloc_size_of` function that does the actual heap
  measurement; this is based on the same functions from the `heapsize` crate.

This patch makes the following changes elsewhere.

- Converts all the uses of `heapsize` to instead use `malloc_size_of`.

- Disables the "heapsize"/"heap_size" feature for the external crates that
  provide it.

- Removes the `HeapSizeOf` implementation from `hashglobe`.

- Adds `ignore` annotations to a few `Rc`/`Arc`, because `malloc_size_of`
  doesn't derive those types, unlike `heapsize`.

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---
<!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `__` with appropriate data: -->
- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [ ] These changes fix https://bugzilla.mozilla.org/show_bug.cgi?id=1409255

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- [ ] There are tests for these changes OR
- [ ] These changes do not require tests because testing is on the Gecko side.

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Source-Repo: https://github.com/servo/servo
Source-Revision: 4c538b642e4bdfbf42c522c5a59c258a6d14546e

--HG--
extra : subtree_source : https%3A//hg.mozilla.org/projects/converted-servo-linear
extra : subtree_revision : f9a6feed1088d0b0be2b55d7f0c2ec9c594ac33b
2017-10-18 13:56:05 -05:00
..
Cargo.toml servo: Merge #18938 - Replace all uses of the heapsize crate with malloc_size_of (from nnethercote:bug-1409255); r=SimonSapin 2017-10-18 13:56:05 -05:00
lib.rs servo: Merge #18938 - Replace all uses of the heapsize crate with malloc_size_of (from nnethercote:bug-1409255); r=SimonSapin 2017-10-18 13:56:05 -05:00
origin.rs servo: Merge #18938 - Replace all uses of the heapsize crate with malloc_size_of (from nnethercote:bug-1409255); r=SimonSapin 2017-10-18 13:56:05 -05:00