|
|
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# This file is automatically @generated by Cargo.
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# It is not intended for manual editing.
|
externref: implement stack map-based garbage collection
For host VM code, we use plain reference counting, where cloning increments
the reference count, and dropping decrements it. We can avoid many of the
on-stack increment/decrement operations that typically plague the
performance of reference counting via Rust's ownership and borrowing system.
Moving a `VMExternRef` avoids mutating its reference count, and borrowing it
either avoids the reference count increment or delays it until if/when the
`VMExternRef` is cloned.
When passing a `VMExternRef` into compiled Wasm code, we don't want to do
reference count mutations for every compiled `local.{get,set}`, nor for
every function call. Therefore, we use a variation of **deferred reference
counting**, where we only mutate reference counts when storing
`VMExternRef`s somewhere that outlives the activation: into a global or
table. Simultaneously, we over-approximate the set of `VMExternRef`s that
are inside Wasm function activations. Periodically, we walk the stack at GC
safe points, and use stack map information to precisely identify the set of
`VMExternRef`s inside Wasm activations. Then we take the difference between
this precise set and our over-approximation, and decrement the reference
count for each of the `VMExternRef`s that are in our over-approximation but
not in the precise set. Finally, the over-approximation is replaced with the
precise set.
The `VMExternRefActivationsTable` implements the over-approximized set of
`VMExternRef`s referenced by Wasm activations. Calling a Wasm function and
passing it a `VMExternRef` moves the `VMExternRef` into the table, and the
compiled Wasm function logically "borrows" the `VMExternRef` from the
table. Similarly, `global.get` and `table.get` operations clone the gotten
`VMExternRef` into the `VMExternRefActivationsTable` and then "borrow" the
reference out of the table.
When a `VMExternRef` is returned to host code from a Wasm function, the host
increments the reference count (because the reference is logically
"borrowed" from the `VMExternRefActivationsTable` and the reference count
from the table will be dropped at the next GC).
For more general information on deferred reference counting, see *An
Examination of Deferred Reference Counting and Cycle Detection* by Quinane:
https://openresearch-repository.anu.edu.au/bitstream/1885/42030/2/hon-thesis.pdf
cc #929
Fixes #1804
4 years ago
|
|
|
[[package]]
|
|
|
|
|
name = "addr2line"
|
|
|
|
|
version = "0.14.0"
|
externref: implement stack map-based garbage collection
For host VM code, we use plain reference counting, where cloning increments
the reference count, and dropping decrements it. We can avoid many of the
on-stack increment/decrement operations that typically plague the
performance of reference counting via Rust's ownership and borrowing system.
Moving a `VMExternRef` avoids mutating its reference count, and borrowing it
either avoids the reference count increment or delays it until if/when the
`VMExternRef` is cloned.
When passing a `VMExternRef` into compiled Wasm code, we don't want to do
reference count mutations for every compiled `local.{get,set}`, nor for
every function call. Therefore, we use a variation of **deferred reference
counting**, where we only mutate reference counts when storing
`VMExternRef`s somewhere that outlives the activation: into a global or
table. Simultaneously, we over-approximate the set of `VMExternRef`s that
are inside Wasm function activations. Periodically, we walk the stack at GC
safe points, and use stack map information to precisely identify the set of
`VMExternRef`s inside Wasm activations. Then we take the difference between
this precise set and our over-approximation, and decrement the reference
count for each of the `VMExternRef`s that are in our over-approximation but
not in the precise set. Finally, the over-approximation is replaced with the
precise set.
The `VMExternRefActivationsTable` implements the over-approximized set of
`VMExternRef`s referenced by Wasm activations. Calling a Wasm function and
passing it a `VMExternRef` moves the `VMExternRef` into the table, and the
compiled Wasm function logically "borrows" the `VMExternRef` from the
table. Similarly, `global.get` and `table.get` operations clone the gotten
`VMExternRef` into the `VMExternRefActivationsTable` and then "borrow" the
reference out of the table.
When a `VMExternRef` is returned to host code from a Wasm function, the host
increments the reference count (because the reference is logically
"borrowed" from the `VMExternRefActivationsTable` and the reference count
from the table will be dropped at the next GC).
For more general information on deferred reference counting, see *An
Examination of Deferred Reference Counting and Cycle Detection* by Quinane:
https://openresearch-repository.anu.edu.au/bitstream/1885/42030/2/hon-thesis.pdf
cc #929
Fixes #1804
4 years ago
|
|
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
|
|
|
|
checksum = "7c0929d69e78dd9bf5408269919fcbcaeb2e35e5d43e5815517cdc6a8e11a423"
|
externref: implement stack map-based garbage collection
For host VM code, we use plain reference counting, where cloning increments
the reference count, and dropping decrements it. We can avoid many of the
on-stack increment/decrement operations that typically plague the
performance of reference counting via Rust's ownership and borrowing system.
Moving a `VMExternRef` avoids mutating its reference count, and borrowing it
either avoids the reference count increment or delays it until if/when the
`VMExternRef` is cloned.
When passing a `VMExternRef` into compiled Wasm code, we don't want to do
reference count mutations for every compiled `local.{get,set}`, nor for
every function call. Therefore, we use a variation of **deferred reference
counting**, where we only mutate reference counts when storing
`VMExternRef`s somewhere that outlives the activation: into a global or
table. Simultaneously, we over-approximate the set of `VMExternRef`s that
are inside Wasm function activations. Periodically, we walk the stack at GC
safe points, and use stack map information to precisely identify the set of
`VMExternRef`s inside Wasm activations. Then we take the difference between
this precise set and our over-approximation, and decrement the reference
count for each of the `VMExternRef`s that are in our over-approximation but
not in the precise set. Finally, the over-approximation is replaced with the
precise set.
The `VMExternRefActivationsTable` implements the over-approximized set of
`VMExternRef`s referenced by Wasm activations. Calling a Wasm function and
passing it a `VMExternRef` moves the `VMExternRef` into the table, and the
compiled Wasm function logically "borrows" the `VMExternRef` from the
table. Similarly, `global.get` and `table.get` operations clone the gotten
`VMExternRef` into the `VMExternRefActivationsTable` and then "borrow" the
reference out of the table.
When a `VMExternRef` is returned to host code from a Wasm function, the host
increments the reference count (because the reference is logically
"borrowed" from the `VMExternRefActivationsTable` and the reference count
from the table will be dropped at the next GC).
For more general information on deferred reference counting, see *An
Examination of Deferred Reference Counting and Cycle Detection* by Quinane:
https://openresearch-repository.anu.edu.au/bitstream/1885/42030/2/hon-thesis.pdf
cc #929
Fixes #1804
4 years ago
|
|
|
dependencies = [
|
|
|
|
|
"gimli",
|
externref: implement stack map-based garbage collection
For host VM code, we use plain reference counting, where cloning increments
the reference count, and dropping decrements it. We can avoid many of the
on-stack increment/decrement operations that typically plague the
performance of reference counting via Rust's ownership and borrowing system.
Moving a `VMExternRef` avoids mutating its reference count, and borrowing it
either avoids the reference count increment or delays it until if/when the
`VMExternRef` is cloned.
When passing a `VMExternRef` into compiled Wasm code, we don't want to do
reference count mutations for every compiled `local.{get,set}`, nor for
every function call. Therefore, we use a variation of **deferred reference
counting**, where we only mutate reference counts when storing
`VMExternRef`s somewhere that outlives the activation: into a global or
table. Simultaneously, we over-approximate the set of `VMExternRef`s that
are inside Wasm function activations. Periodically, we walk the stack at GC
safe points, and use stack map information to precisely identify the set of
`VMExternRef`s inside Wasm activations. Then we take the difference between
this precise set and our over-approximation, and decrement the reference
count for each of the `VMExternRef`s that are in our over-approximation but
not in the precise set. Finally, the over-approximation is replaced with the
precise set.
The `VMExternRefActivationsTable` implements the over-approximized set of
`VMExternRef`s referenced by Wasm activations. Calling a Wasm function and
passing it a `VMExternRef` moves the `VMExternRef` into the table, and the
compiled Wasm function logically "borrows" the `VMExternRef` from the
table. Similarly, `global.get` and `table.get` operations clone the gotten
`VMExternRef` into the `VMExternRefActivationsTable` and then "borrow" the
reference out of the table.
When a `VMExternRef` is returned to host code from a Wasm function, the host
increments the reference count (because the reference is logically
"borrowed" from the `VMExternRefActivationsTable` and the reference count
from the table will be dropped at the next GC).
For more general information on deferred reference counting, see *An
Examination of Deferred Reference Counting and Cycle Detection* by Quinane:
https://openresearch-repository.anu.edu.au/bitstream/1885/42030/2/hon-thesis.pdf
cc #929
Fixes #1804
4 years ago
|
|
|
]
|
|
|
|
|
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|
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|
|
[[package]]
|
|
|
|
|
name = "adler"
|
|
|
|
|
version = "0.2.3"
|
externref: implement stack map-based garbage collection
For host VM code, we use plain reference counting, where cloning increments
the reference count, and dropping decrements it. We can avoid many of the
on-stack increment/decrement operations that typically plague the
performance of reference counting via Rust's ownership and borrowing system.
Moving a `VMExternRef` avoids mutating its reference count, and borrowing it
either avoids the reference count increment or delays it until if/when the
`VMExternRef` is cloned.
When passing a `VMExternRef` into compiled Wasm code, we don't want to do
reference count mutations for every compiled `local.{get,set}`, nor for
every function call. Therefore, we use a variation of **deferred reference
counting**, where we only mutate reference counts when storing
`VMExternRef`s somewhere that outlives the activation: into a global or
table. Simultaneously, we over-approximate the set of `VMExternRef`s that
are inside Wasm function activations. Periodically, we walk the stack at GC
safe points, and use stack map information to precisely identify the set of
`VMExternRef`s inside Wasm activations. Then we take the difference between
this precise set and our over-approximation, and decrement the reference
count for each of the `VMExternRef`s that are in our over-approximation but
not in the precise set. Finally, the over-approximation is replaced with the
precise set.
The `VMExternRefActivationsTable` implements the over-approximized set of
`VMExternRef`s referenced by Wasm activations. Calling a Wasm function and
passing it a `VMExternRef` moves the `VMExternRef` into the table, and the
compiled Wasm function logically "borrows" the `VMExternRef` from the
table. Similarly, `global.get` and `table.get` operations clone the gotten
`VMExternRef` into the `VMExternRefActivationsTable` and then "borrow" the
reference out of the table.
When a `VMExternRef` is returned to host code from a Wasm function, the host
increments the reference count (because the reference is logically
"borrowed" from the `VMExternRefActivationsTable` and the reference count
from the table will be dropped at the next GC).
For more general information on deferred reference counting, see *An
Examination of Deferred Reference Counting and Cycle Detection* by Quinane:
https://openresearch-repository.anu.edu.au/bitstream/1885/42030/2/hon-thesis.pdf
cc #929
Fixes #1804
4 years ago
|
|
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
|
|
|
|
checksum = "ee2a4ec343196209d6594e19543ae87a39f96d5534d7174822a3ad825dd6ed7e"
|
externref: implement stack map-based garbage collection
For host VM code, we use plain reference counting, where cloning increments
the reference count, and dropping decrements it. We can avoid many of the
on-stack increment/decrement operations that typically plague the
performance of reference counting via Rust's ownership and borrowing system.
Moving a `VMExternRef` avoids mutating its reference count, and borrowing it
either avoids the reference count increment or delays it until if/when the
`VMExternRef` is cloned.
When passing a `VMExternRef` into compiled Wasm code, we don't want to do
reference count mutations for every compiled `local.{get,set}`, nor for
every function call. Therefore, we use a variation of **deferred reference
counting**, where we only mutate reference counts when storing
`VMExternRef`s somewhere that outlives the activation: into a global or
table. Simultaneously, we over-approximate the set of `VMExternRef`s that
are inside Wasm function activations. Periodically, we walk the stack at GC
safe points, and use stack map information to precisely identify the set of
`VMExternRef`s inside Wasm activations. Then we take the difference between
this precise set and our over-approximation, and decrement the reference
count for each of the `VMExternRef`s that are in our over-approximation but
not in the precise set. Finally, the over-approximation is replaced with the
precise set.
The `VMExternRefActivationsTable` implements the over-approximized set of
`VMExternRef`s referenced by Wasm activations. Calling a Wasm function and
passing it a `VMExternRef` moves the `VMExternRef` into the table, and the
compiled Wasm function logically "borrows" the `VMExternRef` from the
table. Similarly, `global.get` and `table.get` operations clone the gotten
`VMExternRef` into the `VMExternRefActivationsTable` and then "borrow" the
reference out of the table.
When a `VMExternRef` is returned to host code from a Wasm function, the host
increments the reference count (because the reference is logically
"borrowed" from the `VMExternRefActivationsTable` and the reference count
from the table will be dropped at the next GC).
For more general information on deferred reference counting, see *An
Examination of Deferred Reference Counting and Cycle Detection* by Quinane:
https://openresearch-repository.anu.edu.au/bitstream/1885/42030/2/hon-thesis.pdf
cc #929
Fixes #1804
4 years ago
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "ahash"
|
|
|
|
|
version = "0.4.6"
|
|
|
|
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
|
|
|
|
checksum = "f6789e291be47ace86a60303502173d84af8327e3627ecf334356ee0f87a164c"
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "aho-corasick"
|
|
|
|
|
version = "0.7.15"
|
|
|
|
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
|
|
|
|
checksum = "7404febffaa47dac81aa44dba71523c9d069b1bdc50a77db41195149e17f68e5"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"memchr",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "ansi_term"
|
|
|
|
|
version = "0.11.0"
|
|
|
|
|
source = "registry+https://github.com/rust-lang/crates.io-index"
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|
|
checksum = "ee49baf6cb617b853aa8d93bf420db2383fab46d314482ca2803b40d5fde979b"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"winapi",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "ansi_term"
|
|
|
|
|
version = "0.12.1"
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|
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "d52a9bb7ec0cf484c551830a7ce27bd20d67eac647e1befb56b0be4ee39a55d2"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"winapi",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "anyhow"
|
|
|
|
|
version = "1.0.34"
|
|
|
|
|
source = "registry+https://github.com/rust-lang/crates.io-index"
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|
|
checksum = "bf8dcb5b4bbaa28653b647d8c77bd4ed40183b48882e130c1f1ffb73de069fd7"
|
|
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|
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|
|
|
|
[[package]]
|
|
|
|
|
name = "arbitrary"
|
|
|
|
|
version = "0.4.7"
|
|
|
|
|
source = "registry+https://github.com/rust-lang/crates.io-index"
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|
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checksum = "db55d72333851e17d572bec876e390cd3b11eb1ef53ae821dd9f3b653d2b4569"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"derive_arbitrary",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "arrayref"
|
|
|
|
|
version = "0.3.6"
|
|
|
|
|
source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "a4c527152e37cf757a3f78aae5a06fbeefdb07ccc535c980a3208ee3060dd544"
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|
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[[package]]
|
|
|
|
|
name = "arrayvec"
|
|
|
|
|
version = "0.5.2"
|
|
|
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source = "registry+https://github.com/rust-lang/crates.io-index"
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|
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checksum = "23b62fc65de8e4e7f52534fb52b0f3ed04746ae267519eef2a83941e8085068b"
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|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "atty"
|
|
|
|
|
version = "0.2.14"
|
|
|
|
|
source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "d9b39be18770d11421cdb1b9947a45dd3f37e93092cbf377614828a319d5fee8"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"hermit-abi",
|
|
|
|
|
"libc",
|
|
|
|
|
"winapi",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "autocfg"
|
|
|
|
|
version = "1.0.1"
|
|
|
|
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
|
|
|
|
checksum = "cdb031dd78e28731d87d56cc8ffef4a8f36ca26c38fe2de700543e627f8a464a"
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "backtrace"
|
|
|
|
|
version = "0.3.54"
|
|
|
|
|
source = "registry+https://github.com/rust-lang/crates.io-index"
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|
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checksum = "2baad346b2d4e94a24347adeee9c7a93f412ee94b9cc26e5b59dea23848e9f28"
|
|
|
|
|
dependencies = [
|
externref: implement stack map-based garbage collection
For host VM code, we use plain reference counting, where cloning increments
the reference count, and dropping decrements it. We can avoid many of the
on-stack increment/decrement operations that typically plague the
performance of reference counting via Rust's ownership and borrowing system.
Moving a `VMExternRef` avoids mutating its reference count, and borrowing it
either avoids the reference count increment or delays it until if/when the
`VMExternRef` is cloned.
When passing a `VMExternRef` into compiled Wasm code, we don't want to do
reference count mutations for every compiled `local.{get,set}`, nor for
every function call. Therefore, we use a variation of **deferred reference
counting**, where we only mutate reference counts when storing
`VMExternRef`s somewhere that outlives the activation: into a global or
table. Simultaneously, we over-approximate the set of `VMExternRef`s that
are inside Wasm function activations. Periodically, we walk the stack at GC
safe points, and use stack map information to precisely identify the set of
`VMExternRef`s inside Wasm activations. Then we take the difference between
this precise set and our over-approximation, and decrement the reference
count for each of the `VMExternRef`s that are in our over-approximation but
not in the precise set. Finally, the over-approximation is replaced with the
precise set.
The `VMExternRefActivationsTable` implements the over-approximized set of
`VMExternRef`s referenced by Wasm activations. Calling a Wasm function and
passing it a `VMExternRef` moves the `VMExternRef` into the table, and the
compiled Wasm function logically "borrows" the `VMExternRef` from the
table. Similarly, `global.get` and `table.get` operations clone the gotten
`VMExternRef` into the `VMExternRefActivationsTable` and then "borrow" the
reference out of the table.
When a `VMExternRef` is returned to host code from a Wasm function, the host
increments the reference count (because the reference is logically
"borrowed" from the `VMExternRefActivationsTable` and the reference count
from the table will be dropped at the next GC).
For more general information on deferred reference counting, see *An
Examination of Deferred Reference Counting and Cycle Detection* by Quinane:
https://openresearch-repository.anu.edu.au/bitstream/1885/42030/2/hon-thesis.pdf
cc #929
Fixes #1804
4 years ago
|
|
|
"addr2line",
|
|
|
|
|
"cfg-if 1.0.0",
|
|
|
|
|
"libc",
|
externref: implement stack map-based garbage collection
For host VM code, we use plain reference counting, where cloning increments
the reference count, and dropping decrements it. We can avoid many of the
on-stack increment/decrement operations that typically plague the
performance of reference counting via Rust's ownership and borrowing system.
Moving a `VMExternRef` avoids mutating its reference count, and borrowing it
either avoids the reference count increment or delays it until if/when the
`VMExternRef` is cloned.
When passing a `VMExternRef` into compiled Wasm code, we don't want to do
reference count mutations for every compiled `local.{get,set}`, nor for
every function call. Therefore, we use a variation of **deferred reference
counting**, where we only mutate reference counts when storing
`VMExternRef`s somewhere that outlives the activation: into a global or
table. Simultaneously, we over-approximate the set of `VMExternRef`s that
are inside Wasm function activations. Periodically, we walk the stack at GC
safe points, and use stack map information to precisely identify the set of
`VMExternRef`s inside Wasm activations. Then we take the difference between
this precise set and our over-approximation, and decrement the reference
count for each of the `VMExternRef`s that are in our over-approximation but
not in the precise set. Finally, the over-approximation is replaced with the
precise set.
The `VMExternRefActivationsTable` implements the over-approximized set of
`VMExternRef`s referenced by Wasm activations. Calling a Wasm function and
passing it a `VMExternRef` moves the `VMExternRef` into the table, and the
compiled Wasm function logically "borrows" the `VMExternRef` from the
table. Similarly, `global.get` and `table.get` operations clone the gotten
`VMExternRef` into the `VMExternRefActivationsTable` and then "borrow" the
reference out of the table.
When a `VMExternRef` is returned to host code from a Wasm function, the host
increments the reference count (because the reference is logically
"borrowed" from the `VMExternRefActivationsTable` and the reference count
from the table will be dropped at the next GC).
For more general information on deferred reference counting, see *An
Examination of Deferred Reference Counting and Cycle Detection* by Quinane:
https://openresearch-repository.anu.edu.au/bitstream/1885/42030/2/hon-thesis.pdf
cc #929
Fixes #1804
4 years ago
|
|
|
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[[package]]
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"cc",
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"libc",
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]
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[[package]]
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"jobserver",
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[[package]]
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[[package]]
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"time",
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"winapi",
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[[package]]
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"strsim",
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"textwrap",
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"unicode-width",
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"vec_map",
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]
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[[package]]
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"cc",
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]
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[[package]]
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name = "console"
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"encode_unicode",
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"libc",
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"regex",
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"terminal_size",
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"unicode-width",
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"winapi",
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"winapi-util",
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]
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[[package]]
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name = "const_fn"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "constant_time_eq"
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version = "0.1.5"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "cpu-time"
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|
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version = "1.0.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "e9e393a7668fe1fad3075085b86c781883000b4ede868f43627b34a87c8b7ded"
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dependencies = [
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"libc",
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"winapi",
|
|
|
|
|
]
|
|
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|
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|
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|
[[package]]
|
|
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|
|
name = "cpuid-bool"
|
|
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|
|
version = "0.1.2"
|
|
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|
|
source = "registry+https://github.com/rust-lang/crates.io-index"
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|
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|
[[package]]
|
|
|
|
|
name = "cranelift"
|
|
|
|
|
version = "0.68.0"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"cranelift-codegen",
|
|
|
|
|
"cranelift-frontend",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "cranelift-bforest"
|
|
|
|
|
version = "0.68.0"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"cranelift-entity",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "cranelift-codegen"
|
|
|
|
|
version = "0.68.0"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"bincode",
|
|
|
|
|
"byteorder",
|
|
|
|
|
"cranelift-bforest",
|
|
|
|
|
"cranelift-codegen-meta",
|
|
|
|
|
"cranelift-codegen-shared",
|
|
|
|
|
"cranelift-entity",
|
|
|
|
|
"gimli",
|
|
|
|
|
"hashbrown",
|
|
|
|
|
"log",
|
|
|
|
|
"peepmatic",
|
|
|
|
|
"peepmatic-runtime",
|
peepmatic: Be generic over the operator type
This lets us avoid the cost of `cranelift_codegen::ir::Opcode` to
`peepmatic_runtime::Operator` conversion overhead, and paves the way for
allowing Peepmatic to support non-clif optimizations (e.g. vcode optimizations).
Rather than defining our own `peepmatic::Operator` type like we used to, now the
whole `peepmatic` crate is effectively generic over a `TOperator` type
parameter. For the Cranelift integration, we use `cranelift_codegen::ir::Opcode`
as the concrete type for our `TOperator` type parameter. For testing, we also
define a `TestOperator` type, so that we can test Peepmatic code without
building all of Cranelift, and we can keep them somewhat isolated from each
other.
The methods that `peepmatic::Operator` had are now translated into trait bounds
on the `TOperator` type. These traits need to be shared between all of
`peepmatic`, `peepmatic-runtime`, and `cranelift-codegen`'s Peepmatic
integration. Therefore, these new traits live in a new crate:
`peepmatic-traits`. This crate acts as a header file of sorts for shared
trait/type/macro definitions.
Additionally, the `peepmatic-runtime` crate no longer depends on the
`peepmatic-macro` procedural macro crate, which should lead to faster build
times for Cranelift when it is using pre-built peephole optimizers.
4 years ago
|
|
|
"peepmatic-traits",
|
|
|
|
|
"regalloc",
|
|
|
|
|
"serde",
|
|
|
|
|
"smallvec",
|
Harvest left-hand side superoptimization candidates.
Given a clif function, harvest all its integer subexpressions, so that they can
be fed into [Souper](https://github.com/google/souper) as candidates for
superoptimization. For some of these candidates, Souper will successfully
synthesize a right-hand side that is equivalent but has lower cost than the
left-hand side. Then, we can combine these left- and right-hand sides into a
complete optimization, and add it to our peephole passes.
To harvest the expression that produced a given value `x`, we do a post-order
traversal of the dataflow graph starting from `x`. As we do this traversal, we
maintain a map from clif values to their translated Souper values. We stop
traversing when we reach anything that can't be translated into Souper IR: a
memory load, a float-to-int conversion, a block parameter, etc. For values
produced by these instructions, we create a Souper `var`, which is an input
variable to the optimization. For instructions that have a direct mapping into
Souper IR, we get the Souper version of each of its operands and then create the
Souper version of the instruction itself. It should now be clear why we do a
post-order traversal: we need an instruction's translated operands in order to
translate the instruction itself. Once this instruction is translated, we update
the clif-to-souper map with this new translation so that any other instruction
that uses this result as an operand has access to the translated value. When the
traversal is complete we return the translation of `x` as the root of left-hand
side candidate.
4 years ago
|
|
|
"souper-ir",
|
|
|
|
|
"target-lexicon",
|
|
|
|
|
"thiserror",
|
|
|
|
|
"wast 27.0.0",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "cranelift-codegen-meta"
|
|
|
|
|
version = "0.68.0"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"cranelift-codegen-shared",
|
|
|
|
|
"cranelift-entity",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "cranelift-codegen-shared"
|
|
|
|
|
version = "0.68.0"
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "cranelift-entity"
|
|
|
|
|
version = "0.68.0"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"serde",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "cranelift-filetests"
|
|
|
|
|
version = "0.66.0"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"anyhow",
|
|
|
|
|
"byteorder",
|
|
|
|
|
"cranelift-codegen",
|
|
|
|
|
"cranelift-frontend",
|
|
|
|
|
"cranelift-interpreter",
|
|
|
|
|
"cranelift-native",
|
|
|
|
|
"cranelift-preopt",
|
|
|
|
|
"cranelift-reader",
|
|
|
|
|
"file-per-thread-logger",
|
|
|
|
|
"filecheck",
|
|
|
|
|
"gimli",
|
|
|
|
|
"log",
|
|
|
|
|
"memmap",
|
|
|
|
|
"num_cpus",
|
|
|
|
|
"target-lexicon",
|
|
|
|
|
"thiserror",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "cranelift-frontend"
|
|
|
|
|
version = "0.68.0"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"cranelift-codegen",
|
|
|
|
|
"hashbrown",
|
|
|
|
|
"log",
|
|
|
|
|
"smallvec",
|
|
|
|
|
"target-lexicon",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "cranelift-interpreter"
|
|
|
|
|
version = "0.68.0"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"cranelift-codegen",
|
|
|
|
|
"cranelift-entity",
|
|
|
|
|
"cranelift-frontend",
|
|
|
|
|
"cranelift-reader",
|
|
|
|
|
"log",
|
|
|
|
|
"smallvec",
|
|
|
|
|
"thiserror",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "cranelift-module"
|
|
|
|
|
version = "0.68.0"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"anyhow",
|
|
|
|
|
"cranelift-codegen",
|
|
|
|
|
"cranelift-entity",
|
|
|
|
|
"hashbrown",
|
|
|
|
|
"log",
|
|
|
|
|
"thiserror",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "cranelift-native"
|
|
|
|
|
version = "0.68.0"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"cranelift-codegen",
|
|
|
|
|
"raw-cpuid",
|
|
|
|
|
"target-lexicon",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "cranelift-object"
|
|
|
|
|
version = "0.68.0"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"anyhow",
|
|
|
|
|
"cranelift-codegen",
|
|
|
|
|
"cranelift-entity",
|
|
|
|
|
"cranelift-frontend",
|
|
|
|
|
"cranelift-module",
|
|
|
|
|
"log",
|
|
|
|
|
"object",
|
|
|
|
|
"target-lexicon",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "cranelift-preopt"
|
|
|
|
|
version = "0.68.0"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"cranelift-codegen",
|
|
|
|
|
"cranelift-entity",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "cranelift-reader"
|
|
|
|
|
version = "0.68.0"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"cranelift-codegen",
|
|
|
|
|
"smallvec",
|
|
|
|
|
"target-lexicon",
|
|
|
|
|
"thiserror",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "cranelift-serde"
|
|
|
|
|
version = "0.68.0"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"clap",
|
|
|
|
|
"cranelift-codegen",
|
|
|
|
|
"cranelift-reader",
|
|
|
|
|
"serde",
|
|
|
|
|
"serde_derive",
|
|
|
|
|
"serde_json",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "cranelift-simplejit"
|
|
|
|
|
version = "0.68.0"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"cranelift",
|
|
|
|
|
"cranelift-codegen",
|
|
|
|
|
"cranelift-entity",
|
|
|
|
|
"cranelift-frontend",
|
|
|
|
|
"cranelift-module",
|
|
|
|
|
"cranelift-native",
|
|
|
|
|
"errno",
|
|
|
|
|
"libc",
|
|
|
|
|
"log",
|
|
|
|
|
"memmap",
|
|
|
|
|
"region",
|
|
|
|
|
"target-lexicon",
|
|
|
|
|
"winapi",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "cranelift-tools"
|
|
|
|
|
version = "0.66.0"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"anyhow",
|
|
|
|
|
"capstone",
|
|
|
|
|
"cfg-if 1.0.0",
|
|
|
|
|
"cranelift",
|
|
|
|
|
"cranelift-codegen",
|
|
|
|
|
"cranelift-entity",
|
|
|
|
|
"cranelift-filetests",
|
|
|
|
|
"cranelift-frontend",
|
|
|
|
|
"cranelift-interpreter",
|
|
|
|
|
"cranelift-module",
|
|
|
|
|
"cranelift-native",
|
|
|
|
|
"cranelift-object",
|
|
|
|
|
"cranelift-preopt",
|
|
|
|
|
"cranelift-reader",
|
|
|
|
|
"cranelift-serde",
|
|
|
|
|
"cranelift-simplejit",
|
|
|
|
|
"cranelift-wasm",
|
|
|
|
|
"file-per-thread-logger",
|
|
|
|
|
"filecheck",
|
|
|
|
|
"indicatif",
|
|
|
|
|
"log",
|
|
|
|
|
"peepmatic-souper",
|
|
|
|
|
"pretty_env_logger",
|
Harvest left-hand side superoptimization candidates.
Given a clif function, harvest all its integer subexpressions, so that they can
be fed into [Souper](https://github.com/google/souper) as candidates for
superoptimization. For some of these candidates, Souper will successfully
synthesize a right-hand side that is equivalent but has lower cost than the
left-hand side. Then, we can combine these left- and right-hand sides into a
complete optimization, and add it to our peephole passes.
To harvest the expression that produced a given value `x`, we do a post-order
traversal of the dataflow graph starting from `x`. As we do this traversal, we
maintain a map from clif values to their translated Souper values. We stop
traversing when we reach anything that can't be translated into Souper IR: a
memory load, a float-to-int conversion, a block parameter, etc. For values
produced by these instructions, we create a Souper `var`, which is an input
variable to the optimization. For instructions that have a direct mapping into
Souper IR, we get the Souper version of each of its operands and then create the
Souper version of the instruction itself. It should now be clear why we do a
post-order traversal: we need an instruction's translated operands in order to
translate the instruction itself. Once this instruction is translated, we update
the clif-to-souper map with this new translation so that any other instruction
that uses this result as an operand has access to the translated value. When the
traversal is complete we return the translation of `x` as the root of left-hand
side candidate.
4 years ago
|
|
|
"rayon",
|
|
|
|
|
"structopt",
|
|
|
|
|
"target-lexicon",
|
|
|
|
|
"term",
|
|
|
|
|
"thiserror",
|
|
|
|
|
"walkdir",
|
|
|
|
|
"wat",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "cranelift-wasm"
|
|
|
|
|
version = "0.68.0"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"cranelift-codegen",
|
|
|
|
|
"cranelift-entity",
|
|
|
|
|
"cranelift-frontend",
|
|
|
|
|
"hashbrown",
|
|
|
|
|
"itertools",
|
|
|
|
|
"log",
|
|
|
|
|
"serde",
|
wasm->CLIF translation: consistently bitcast V128 values that are block formal parameters.
In the current translation of wasm (128-bit) SIMD into CLIF, we work around differences in the
type system models of wasm vs CLIF by inserting `bitcast` (a no-op cast) CLIF instructions before
more or less every use of a SIMD value. Unfortunately this was not being done consistently and
even small examples with a single if-then-else diamond that produces a SIMD value, could cause a
verification failure downstream. In this case, the jump out of the "else" block needed a
bitcast, but didn't have one.
This patch wraps creation of CLIF jumps and conditional branches up into three functions,
`canonicalise_then_jump` and `canonicalise_then_br{z,nz}`, and uses them consistently. They
first cast the relevant block formal parameters, then generate the relevant kind of branch/jump.
Hence, provided they are also used consistently in future to generate branches/jumps in this
file, we are protected against such failures.
The patch also adds a large(ish) comment at the top explaining this in more detail.
4 years ago
|
|
|
"smallvec",
|
|
|
|
|
"target-lexicon",
|
|
|
|
|
"thiserror",
|
|
|
|
|
"wasmparser 0.66.0",
|
|
|
|
|
"wat",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "crc32fast"
|
|
|
|
|
version = "1.2.1"
|
|
|
|
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
|
|
|
|
checksum = "81156fece84ab6a9f2afdb109ce3ae577e42b1228441eded99bd77f627953b1a"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"cfg-if 1.0.0",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "crossbeam-channel"
|
|
|
|
|
version = "0.5.0"
|
|
|
|
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
|
|
|
|
checksum = "dca26ee1f8d361640700bde38b2c37d8c22b3ce2d360e1fc1c74ea4b0aa7d775"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"cfg-if 1.0.0",
|
|
|
|
|
"crossbeam-utils 0.8.0",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "crossbeam-deque"
|
|
|
|
|
version = "0.8.0"
|
|
|
|
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
|
|
|
|
checksum = "94af6efb46fef72616855b036a624cf27ba656ffc9be1b9a3c931cfc7749a9a9"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"cfg-if 1.0.0",
|
|
|
|
|
"crossbeam-epoch",
|
|
|
|
|
"crossbeam-utils 0.8.0",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "crossbeam-epoch"
|
|
|
|
|
version = "0.9.0"
|
|
|
|
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
|
|
|
|
checksum = "ec0f606a85340376eef0d6d8fec399e6d4a544d648386c6645eb6d0653b27d9f"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"cfg-if 1.0.0",
|
|
|
|
|
"const_fn",
|
|
|
|
|
"crossbeam-utils 0.8.0",
|
|
|
|
|
"lazy_static",
|
|
|
|
|
"memoffset 0.5.6",
|
|
|
|
|
"scopeguard",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "crossbeam-utils"
|
|
|
|
|
version = "0.7.2"
|
|
|
|
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
|
|
|
|
checksum = "c3c7c73a2d1e9fc0886a08b93e98eb643461230d5f1925e4036204d5f2e261a8"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"autocfg",
|
|
|
|
|
"cfg-if 0.1.10",
|
|
|
|
|
"lazy_static",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "crossbeam-utils"
|
|
|
|
|
version = "0.8.0"
|
|
|
|
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
|
|
|
|
checksum = "ec91540d98355f690a86367e566ecad2e9e579f230230eb7c21398372be73ea5"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"autocfg",
|
|
|
|
|
"cfg-if 1.0.0",
|
|
|
|
|
"const_fn",
|
|
|
|
|
"lazy_static",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "cvt"
|
|
|
|
|
version = "0.1.1"
|
|
|
|
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
|
|
|
|
checksum = "34ac344c7efccb80cd25bc61b2170aec26f2f693fd40e765a539a1243db48c71"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"cfg-if 0.1.10",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "derive_arbitrary"
|
|
|
|
|
version = "0.4.7"
|
|
|
|
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
|
|
|
|
checksum = "b1a012b5e473dc912f0db0546a1c9c6a194ce8494feb66fa0237160926f9e0e6"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"proc-macro2",
|
|
|
|
|
"quote",
|
|
|
|
|
"syn",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "derive_more"
|
|
|
|
|
version = "0.99.11"
|
|
|
|
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
|
|
|
|
checksum = "41cb0e6161ad61ed084a36ba71fbba9e3ac5aee3606fb607fe08da6acbcf3d8c"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"proc-macro2",
|
|
|
|
|
"quote",
|
|
|
|
|
"syn",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "derive_utils"
|
|
|
|
|
version = "0.10.0"
|
|
|
|
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
|
|
|
|
checksum = "3df5480412da86cdf5d6b7f3b682422c84359ff7399aa658df1d15ee83244b1d"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"proc-macro2",
|
|
|
|
|
"quote",
|
|
|
|
|
"syn",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "diff"
|
|
|
|
|
version = "0.1.12"
|
|
|
|
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
|
|
|
|
checksum = "0e25ea47919b1560c4e3b7fe0aaab9becf5b84a10325ddf7db0f0ba5e1026499"
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "digest"
|
|
|
|
|
version = "0.9.0"
|
|
|
|
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
|
|
|
|
checksum = "d3dd60d1080a57a05ab032377049e0591415d2b31afd7028356dbf3cc6dcb066"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"generic-array",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "directories-next"
|
|
|
|
|
version = "2.0.0"
|
|
|
|
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
|
|
|
|
checksum = "339ee130d97a610ea5a5872d2bbb130fdf68884ff09d3028b81bec8a1ac23bbc"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"cfg-if 1.0.0",
|
|
|
|
|
"dirs-sys-next",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "dirs"
|
|
|
|
|
version = "2.0.2"
|
|
|
|
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
|
|
|
|
checksum = "13aea89a5c93364a98e9b37b2fa237effbb694d5cfe01c5b70941f7eb087d5e3"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"cfg-if 0.1.10",
|
|
|
|
|
"dirs-sys",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
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"lazy_static",
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"number_prefix",
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"regex",
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[[package]]
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source = "registry+https://github.com/rust-lang/crates.io-index"
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"derive_utils",
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"quote",
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"syn",
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[[package]]
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name = "itertools"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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"either",
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[[package]]
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source = "registry+https://github.com/rust-lang/crates.io-index"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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"cmake",
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"libc",
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[[package]]
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name = "lazy_static"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "leb128"
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version = "0.2.4"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "libc"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"arbitrary",
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"cc",
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]
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[[package]]
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name = "lightbeam"
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"anyhow",
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"arrayvec",
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"capstone",
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"cranelift-codegen",
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"derive_more",
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"dynasm",
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"dynasmrt",
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"iter-enum",
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"itertools",
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"lazy_static",
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"memoffset 0.6.1",
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"more-asserts",
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"quickcheck",
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"smallvec",
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"thiserror",
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"typemap",
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"wasmparser 0.66.0",
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"wat",
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]
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[[package]]
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name = "log"
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version = "0.4.11"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "4fabed175da42fed1fa0746b0ea71f412aa9d35e76e95e59b192c64b9dc2bf8b"
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dependencies = [
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"cfg-if 0.1.10",
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]
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[[package]]
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name = "loom"
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version = "0.3.6"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"cfg-if 0.1.10",
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"generator",
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"scoped-tls",
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"serde",
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"serde_json",
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[[package]]
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name = "mach"
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version = "0.3.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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"libc",
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[[package]]
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name = "matchers"
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version = "0.0.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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"regex-automata",
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[[package]]
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name = "memchr"
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name = "memmap"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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"libc",
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"winapi",
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[[package]]
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "memoffset"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"autocfg",
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]
|
|
|
|
|
|
externref: implement stack map-based garbage collection
For host VM code, we use plain reference counting, where cloning increments
the reference count, and dropping decrements it. We can avoid many of the
on-stack increment/decrement operations that typically plague the
performance of reference counting via Rust's ownership and borrowing system.
Moving a `VMExternRef` avoids mutating its reference count, and borrowing it
either avoids the reference count increment or delays it until if/when the
`VMExternRef` is cloned.
When passing a `VMExternRef` into compiled Wasm code, we don't want to do
reference count mutations for every compiled `local.{get,set}`, nor for
every function call. Therefore, we use a variation of **deferred reference
counting**, where we only mutate reference counts when storing
`VMExternRef`s somewhere that outlives the activation: into a global or
table. Simultaneously, we over-approximate the set of `VMExternRef`s that
are inside Wasm function activations. Periodically, we walk the stack at GC
safe points, and use stack map information to precisely identify the set of
`VMExternRef`s inside Wasm activations. Then we take the difference between
this precise set and our over-approximation, and decrement the reference
count for each of the `VMExternRef`s that are in our over-approximation but
not in the precise set. Finally, the over-approximation is replaced with the
precise set.
The `VMExternRefActivationsTable` implements the over-approximized set of
`VMExternRef`s referenced by Wasm activations. Calling a Wasm function and
passing it a `VMExternRef` moves the `VMExternRef` into the table, and the
compiled Wasm function logically "borrows" the `VMExternRef` from the
table. Similarly, `global.get` and `table.get` operations clone the gotten
`VMExternRef` into the `VMExternRefActivationsTable` and then "borrow" the
reference out of the table.
When a `VMExternRef` is returned to host code from a Wasm function, the host
increments the reference count (because the reference is logically
"borrowed" from the `VMExternRefActivationsTable` and the reference count
from the table will be dropped at the next GC).
For more general information on deferred reference counting, see *An
Examination of Deferred Reference Counting and Cycle Detection* by Quinane:
https://openresearch-repository.anu.edu.au/bitstream/1885/42030/2/hon-thesis.pdf
cc #929
Fixes #1804
4 years ago
|
|
|
[[package]]
|
|
|
|
|
name = "miniz_oxide"
|
|
|
|
|
version = "0.4.3"
|
externref: implement stack map-based garbage collection
For host VM code, we use plain reference counting, where cloning increments
the reference count, and dropping decrements it. We can avoid many of the
on-stack increment/decrement operations that typically plague the
performance of reference counting via Rust's ownership and borrowing system.
Moving a `VMExternRef` avoids mutating its reference count, and borrowing it
either avoids the reference count increment or delays it until if/when the
`VMExternRef` is cloned.
When passing a `VMExternRef` into compiled Wasm code, we don't want to do
reference count mutations for every compiled `local.{get,set}`, nor for
every function call. Therefore, we use a variation of **deferred reference
counting**, where we only mutate reference counts when storing
`VMExternRef`s somewhere that outlives the activation: into a global or
table. Simultaneously, we over-approximate the set of `VMExternRef`s that
are inside Wasm function activations. Periodically, we walk the stack at GC
safe points, and use stack map information to precisely identify the set of
`VMExternRef`s inside Wasm activations. Then we take the difference between
this precise set and our over-approximation, and decrement the reference
count for each of the `VMExternRef`s that are in our over-approximation but
not in the precise set. Finally, the over-approximation is replaced with the
precise set.
The `VMExternRefActivationsTable` implements the over-approximized set of
`VMExternRef`s referenced by Wasm activations. Calling a Wasm function and
passing it a `VMExternRef` moves the `VMExternRef` into the table, and the
compiled Wasm function logically "borrows" the `VMExternRef` from the
table. Similarly, `global.get` and `table.get` operations clone the gotten
`VMExternRef` into the `VMExternRefActivationsTable` and then "borrow" the
reference out of the table.
When a `VMExternRef` is returned to host code from a Wasm function, the host
increments the reference count (because the reference is logically
"borrowed" from the `VMExternRefActivationsTable` and the reference count
from the table will be dropped at the next GC).
For more general information on deferred reference counting, see *An
Examination of Deferred Reference Counting and Cycle Detection* by Quinane:
https://openresearch-repository.anu.edu.au/bitstream/1885/42030/2/hon-thesis.pdf
cc #929
Fixes #1804
4 years ago
|
|
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
|
|
|
|
checksum = "0f2d26ec3309788e423cfbf68ad1800f061638098d76a83681af979dc4eda19d"
|
externref: implement stack map-based garbage collection
For host VM code, we use plain reference counting, where cloning increments
the reference count, and dropping decrements it. We can avoid many of the
on-stack increment/decrement operations that typically plague the
performance of reference counting via Rust's ownership and borrowing system.
Moving a `VMExternRef` avoids mutating its reference count, and borrowing it
either avoids the reference count increment or delays it until if/when the
`VMExternRef` is cloned.
When passing a `VMExternRef` into compiled Wasm code, we don't want to do
reference count mutations for every compiled `local.{get,set}`, nor for
every function call. Therefore, we use a variation of **deferred reference
counting**, where we only mutate reference counts when storing
`VMExternRef`s somewhere that outlives the activation: into a global or
table. Simultaneously, we over-approximate the set of `VMExternRef`s that
are inside Wasm function activations. Periodically, we walk the stack at GC
safe points, and use stack map information to precisely identify the set of
`VMExternRef`s inside Wasm activations. Then we take the difference between
this precise set and our over-approximation, and decrement the reference
count for each of the `VMExternRef`s that are in our over-approximation but
not in the precise set. Finally, the over-approximation is replaced with the
precise set.
The `VMExternRefActivationsTable` implements the over-approximized set of
`VMExternRef`s referenced by Wasm activations. Calling a Wasm function and
passing it a `VMExternRef` moves the `VMExternRef` into the table, and the
compiled Wasm function logically "borrows" the `VMExternRef` from the
table. Similarly, `global.get` and `table.get` operations clone the gotten
`VMExternRef` into the `VMExternRefActivationsTable` and then "borrow" the
reference out of the table.
When a `VMExternRef` is returned to host code from a Wasm function, the host
increments the reference count (because the reference is logically
"borrowed" from the `VMExternRefActivationsTable` and the reference count
from the table will be dropped at the next GC).
For more general information on deferred reference counting, see *An
Examination of Deferred Reference Counting and Cycle Detection* by Quinane:
https://openresearch-repository.anu.edu.au/bitstream/1885/42030/2/hon-thesis.pdf
cc #929
Fixes #1804
4 years ago
|
|
|
dependencies = [
|
|
|
|
|
"adler",
|
|
|
|
|
"autocfg",
|
externref: implement stack map-based garbage collection
For host VM code, we use plain reference counting, where cloning increments
the reference count, and dropping decrements it. We can avoid many of the
on-stack increment/decrement operations that typically plague the
performance of reference counting via Rust's ownership and borrowing system.
Moving a `VMExternRef` avoids mutating its reference count, and borrowing it
either avoids the reference count increment or delays it until if/when the
`VMExternRef` is cloned.
When passing a `VMExternRef` into compiled Wasm code, we don't want to do
reference count mutations for every compiled `local.{get,set}`, nor for
every function call. Therefore, we use a variation of **deferred reference
counting**, where we only mutate reference counts when storing
`VMExternRef`s somewhere that outlives the activation: into a global or
table. Simultaneously, we over-approximate the set of `VMExternRef`s that
are inside Wasm function activations. Periodically, we walk the stack at GC
safe points, and use stack map information to precisely identify the set of
`VMExternRef`s inside Wasm activations. Then we take the difference between
this precise set and our over-approximation, and decrement the reference
count for each of the `VMExternRef`s that are in our over-approximation but
not in the precise set. Finally, the over-approximation is replaced with the
precise set.
The `VMExternRefActivationsTable` implements the over-approximized set of
`VMExternRef`s referenced by Wasm activations. Calling a Wasm function and
passing it a `VMExternRef` moves the `VMExternRef` into the table, and the
compiled Wasm function logically "borrows" the `VMExternRef` from the
table. Similarly, `global.get` and `table.get` operations clone the gotten
`VMExternRef` into the `VMExternRefActivationsTable` and then "borrow" the
reference out of the table.
When a `VMExternRef` is returned to host code from a Wasm function, the host
increments the reference count (because the reference is logically
"borrowed" from the `VMExternRefActivationsTable` and the reference count
from the table will be dropped at the next GC).
For more general information on deferred reference counting, see *An
Examination of Deferred Reference Counting and Cycle Detection* by Quinane:
https://openresearch-repository.anu.edu.au/bitstream/1885/42030/2/hon-thesis.pdf
cc #929
Fixes #1804
4 years ago
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "more-asserts"
|
|
|
|
|
version = "0.2.1"
|
|
|
|
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
|
|
|
|
checksum = "0debeb9fcf88823ea64d64e4a815ab1643f33127d995978e099942ce38f25238"
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "num-integer"
|
|
|
|
|
version = "0.1.44"
|
|
|
|
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
|
|
|
|
checksum = "d2cc698a63b549a70bc047073d2949cce27cd1c7b0a4a862d08a8031bc2801db"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"autocfg",
|
|
|
|
|
"num-traits",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "num-traits"
|
|
|
|
|
version = "0.2.14"
|
|
|
|
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
|
|
|
|
checksum = "9a64b1ec5cda2586e284722486d802acf1f7dbdc623e2bfc57e65ca1cd099290"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"autocfg",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "num_cpus"
|
|
|
|
|
version = "1.13.0"
|
|
|
|
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
|
|
|
|
checksum = "05499f3756671c15885fee9034446956fff3f243d6077b91e5767df161f766b3"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"hermit-abi",
|
|
|
|
|
"libc",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "number_prefix"
|
|
|
|
|
version = "0.3.0"
|
|
|
|
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
|
|
|
|
checksum = "17b02fc0ff9a9e4b35b3342880f48e896ebf69f2967921fe8646bf5b7125956a"
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "object"
|
|
|
|
|
version = "0.22.0"
|
|
|
|
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
|
|
|
|
checksum = "8d3b63360ec3cb337817c2dbd47ab4a0f170d285d8e5a2064600f3def1402397"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"crc32fast",
|
|
|
|
|
"indexmap",
|
|
|
|
|
"wasmparser 0.57.0",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "once_cell"
|
|
|
|
|
version = "1.4.1"
|
|
|
|
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
|
|
|
|
checksum = "260e51e7efe62b592207e9e13a68e43692a7a279171d6ba57abd208bf23645ad"
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "opaque-debug"
|
|
|
|
|
version = "0.3.0"
|
|
|
|
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
|
|
|
|
checksum = "624a8340c38c1b80fd549087862da4ba43e08858af025b236e509b6649fc13d5"
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "os_pipe"
|
|
|
|
|
version = "0.9.2"
|
|
|
|
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
|
|
|
|
checksum = "fb233f06c2307e1f5ce2ecad9f8121cffbbee2c95428f44ea85222e460d0d213"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"libc",
|
|
|
|
|
"winapi",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "peepmatic"
|
|
|
|
|
version = "0.68.0"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"anyhow",
|
|
|
|
|
"peepmatic-automata",
|
|
|
|
|
"peepmatic-macro",
|
|
|
|
|
"peepmatic-runtime",
|
peepmatic: Be generic over the operator type
This lets us avoid the cost of `cranelift_codegen::ir::Opcode` to
`peepmatic_runtime::Operator` conversion overhead, and paves the way for
allowing Peepmatic to support non-clif optimizations (e.g. vcode optimizations).
Rather than defining our own `peepmatic::Operator` type like we used to, now the
whole `peepmatic` crate is effectively generic over a `TOperator` type
parameter. For the Cranelift integration, we use `cranelift_codegen::ir::Opcode`
as the concrete type for our `TOperator` type parameter. For testing, we also
define a `TestOperator` type, so that we can test Peepmatic code without
building all of Cranelift, and we can keep them somewhat isolated from each
other.
The methods that `peepmatic::Operator` had are now translated into trait bounds
on the `TOperator` type. These traits need to be shared between all of
`peepmatic`, `peepmatic-runtime`, and `cranelift-codegen`'s Peepmatic
integration. Therefore, these new traits live in a new crate:
`peepmatic-traits`. This crate acts as a header file of sorts for shared
trait/type/macro definitions.
Additionally, the `peepmatic-runtime` crate no longer depends on the
`peepmatic-macro` procedural macro crate, which should lead to faster build
times for Cranelift when it is using pre-built peephole optimizers.
4 years ago
|
|
|
"peepmatic-test-operator",
|
|
|
|
|
"peepmatic-traits",
|
|
|
|
|
"serde",
|
|
|
|
|
"wast 27.0.0",
|
|
|
|
|
"z3",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "peepmatic-automata"
|
|
|
|
|
version = "0.68.0"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"serde",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "peepmatic-fuzzing"
|
peepmatic: Be generic over the operator type
This lets us avoid the cost of `cranelift_codegen::ir::Opcode` to
`peepmatic_runtime::Operator` conversion overhead, and paves the way for
allowing Peepmatic to support non-clif optimizations (e.g. vcode optimizations).
Rather than defining our own `peepmatic::Operator` type like we used to, now the
whole `peepmatic` crate is effectively generic over a `TOperator` type
parameter. For the Cranelift integration, we use `cranelift_codegen::ir::Opcode`
as the concrete type for our `TOperator` type parameter. For testing, we also
define a `TestOperator` type, so that we can test Peepmatic code without
building all of Cranelift, and we can keep them somewhat isolated from each
other.
The methods that `peepmatic::Operator` had are now translated into trait bounds
on the `TOperator` type. These traits need to be shared between all of
`peepmatic`, `peepmatic-runtime`, and `cranelift-codegen`'s Peepmatic
integration. Therefore, these new traits live in a new crate:
`peepmatic-traits`. This crate acts as a header file of sorts for shared
trait/type/macro definitions.
Additionally, the `peepmatic-runtime` crate no longer depends on the
`peepmatic-macro` procedural macro crate, which should lead to faster build
times for Cranelift when it is using pre-built peephole optimizers.
4 years ago
|
|
|
version = "0.66.0"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"arbitrary",
|
|
|
|
|
"bincode",
|
|
|
|
|
"env_logger 0.8.1",
|
|
|
|
|
"fst",
|
|
|
|
|
"log",
|
|
|
|
|
"peepmatic",
|
|
|
|
|
"peepmatic-automata",
|
|
|
|
|
"peepmatic-runtime",
|
|
|
|
|
"peepmatic-test",
|
peepmatic: Be generic over the operator type
This lets us avoid the cost of `cranelift_codegen::ir::Opcode` to
`peepmatic_runtime::Operator` conversion overhead, and paves the way for
allowing Peepmatic to support non-clif optimizations (e.g. vcode optimizations).
Rather than defining our own `peepmatic::Operator` type like we used to, now the
whole `peepmatic` crate is effectively generic over a `TOperator` type
parameter. For the Cranelift integration, we use `cranelift_codegen::ir::Opcode`
as the concrete type for our `TOperator` type parameter. For testing, we also
define a `TestOperator` type, so that we can test Peepmatic code without
building all of Cranelift, and we can keep them somewhat isolated from each
other.
The methods that `peepmatic::Operator` had are now translated into trait bounds
on the `TOperator` type. These traits need to be shared between all of
`peepmatic`, `peepmatic-runtime`, and `cranelift-codegen`'s Peepmatic
integration. Therefore, these new traits live in a new crate:
`peepmatic-traits`. This crate acts as a header file of sorts for shared
trait/type/macro definitions.
Additionally, the `peepmatic-runtime` crate no longer depends on the
`peepmatic-macro` procedural macro crate, which should lead to faster build
times for Cranelift when it is using pre-built peephole optimizers.
4 years ago
|
|
|
"peepmatic-test-operator",
|
|
|
|
|
"peepmatic-traits",
|
|
|
|
|
"rand",
|
|
|
|
|
"serde",
|
|
|
|
|
"wast 27.0.0",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "peepmatic-macro"
|
|
|
|
|
version = "0.68.0"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"proc-macro2",
|
|
|
|
|
"quote",
|
|
|
|
|
"syn",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "peepmatic-runtime"
|
|
|
|
|
version = "0.68.0"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"bincode",
|
|
|
|
|
"bumpalo",
|
|
|
|
|
"log",
|
|
|
|
|
"peepmatic-automata",
|
peepmatic: Be generic over the operator type
This lets us avoid the cost of `cranelift_codegen::ir::Opcode` to
`peepmatic_runtime::Operator` conversion overhead, and paves the way for
allowing Peepmatic to support non-clif optimizations (e.g. vcode optimizations).
Rather than defining our own `peepmatic::Operator` type like we used to, now the
whole `peepmatic` crate is effectively generic over a `TOperator` type
parameter. For the Cranelift integration, we use `cranelift_codegen::ir::Opcode`
as the concrete type for our `TOperator` type parameter. For testing, we also
define a `TestOperator` type, so that we can test Peepmatic code without
building all of Cranelift, and we can keep them somewhat isolated from each
other.
The methods that `peepmatic::Operator` had are now translated into trait bounds
on the `TOperator` type. These traits need to be shared between all of
`peepmatic`, `peepmatic-runtime`, and `cranelift-codegen`'s Peepmatic
integration. Therefore, these new traits live in a new crate:
`peepmatic-traits`. This crate acts as a header file of sorts for shared
trait/type/macro definitions.
Additionally, the `peepmatic-runtime` crate no longer depends on the
`peepmatic-macro` procedural macro crate, which should lead to faster build
times for Cranelift when it is using pre-built peephole optimizers.
4 years ago
|
|
|
"peepmatic-test-operator",
|
|
|
|
|
"peepmatic-traits",
|
|
|
|
|
"serde",
|
|
|
|
|
"serde_test",
|
|
|
|
|
"thiserror",
|
|
|
|
|
"wast 27.0.0",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "peepmatic-souper"
|
|
|
|
|
version = "0.68.0"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"anyhow",
|
|
|
|
|
"log",
|
|
|
|
|
"peepmatic",
|
|
|
|
|
"peepmatic-test-operator",
|
|
|
|
|
"souper-ir",
|
|
|
|
|
"wast 27.0.0",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "peepmatic-test"
|
|
|
|
|
version = "0.2.0"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"env_logger 0.8.1",
|
|
|
|
|
"log",
|
|
|
|
|
"peepmatic",
|
|
|
|
|
"peepmatic-runtime",
|
peepmatic: Be generic over the operator type
This lets us avoid the cost of `cranelift_codegen::ir::Opcode` to
`peepmatic_runtime::Operator` conversion overhead, and paves the way for
allowing Peepmatic to support non-clif optimizations (e.g. vcode optimizations).
Rather than defining our own `peepmatic::Operator` type like we used to, now the
whole `peepmatic` crate is effectively generic over a `TOperator` type
parameter. For the Cranelift integration, we use `cranelift_codegen::ir::Opcode`
as the concrete type for our `TOperator` type parameter. For testing, we also
define a `TestOperator` type, so that we can test Peepmatic code without
building all of Cranelift, and we can keep them somewhat isolated from each
other.
The methods that `peepmatic::Operator` had are now translated into trait bounds
on the `TOperator` type. These traits need to be shared between all of
`peepmatic`, `peepmatic-runtime`, and `cranelift-codegen`'s Peepmatic
integration. Therefore, these new traits live in a new crate:
`peepmatic-traits`. This crate acts as a header file of sorts for shared
trait/type/macro definitions.
Additionally, the `peepmatic-runtime` crate no longer depends on the
`peepmatic-macro` procedural macro crate, which should lead to faster build
times for Cranelift when it is using pre-built peephole optimizers.
4 years ago
|
|
|
"peepmatic-test-operator",
|
|
|
|
|
"peepmatic-traits",
|
|
|
|
|
]
|
|
|
|
|
|
peepmatic: Be generic over the operator type
This lets us avoid the cost of `cranelift_codegen::ir::Opcode` to
`peepmatic_runtime::Operator` conversion overhead, and paves the way for
allowing Peepmatic to support non-clif optimizations (e.g. vcode optimizations).
Rather than defining our own `peepmatic::Operator` type like we used to, now the
whole `peepmatic` crate is effectively generic over a `TOperator` type
parameter. For the Cranelift integration, we use `cranelift_codegen::ir::Opcode`
as the concrete type for our `TOperator` type parameter. For testing, we also
define a `TestOperator` type, so that we can test Peepmatic code without
building all of Cranelift, and we can keep them somewhat isolated from each
other.
The methods that `peepmatic::Operator` had are now translated into trait bounds
on the `TOperator` type. These traits need to be shared between all of
`peepmatic`, `peepmatic-runtime`, and `cranelift-codegen`'s Peepmatic
integration. Therefore, these new traits live in a new crate:
`peepmatic-traits`. This crate acts as a header file of sorts for shared
trait/type/macro definitions.
Additionally, the `peepmatic-runtime` crate no longer depends on the
`peepmatic-macro` procedural macro crate, which should lead to faster build
times for Cranelift when it is using pre-built peephole optimizers.
4 years ago
|
|
|
[[package]]
|
|
|
|
|
name = "peepmatic-test-operator"
|
|
|
|
|
version = "0.68.0"
|
peepmatic: Be generic over the operator type
This lets us avoid the cost of `cranelift_codegen::ir::Opcode` to
`peepmatic_runtime::Operator` conversion overhead, and paves the way for
allowing Peepmatic to support non-clif optimizations (e.g. vcode optimizations).
Rather than defining our own `peepmatic::Operator` type like we used to, now the
whole `peepmatic` crate is effectively generic over a `TOperator` type
parameter. For the Cranelift integration, we use `cranelift_codegen::ir::Opcode`
as the concrete type for our `TOperator` type parameter. For testing, we also
define a `TestOperator` type, so that we can test Peepmatic code without
building all of Cranelift, and we can keep them somewhat isolated from each
other.
The methods that `peepmatic::Operator` had are now translated into trait bounds
on the `TOperator` type. These traits need to be shared between all of
`peepmatic`, `peepmatic-runtime`, and `cranelift-codegen`'s Peepmatic
integration. Therefore, these new traits live in a new crate:
`peepmatic-traits`. This crate acts as a header file of sorts for shared
trait/type/macro definitions.
Additionally, the `peepmatic-runtime` crate no longer depends on the
`peepmatic-macro` procedural macro crate, which should lead to faster build
times for Cranelift when it is using pre-built peephole optimizers.
4 years ago
|
|
|
dependencies = [
|
|
|
|
|
"peepmatic-traits",
|
|
|
|
|
"serde",
|
|
|
|
|
"wast 27.0.0",
|
peepmatic: Be generic over the operator type
This lets us avoid the cost of `cranelift_codegen::ir::Opcode` to
`peepmatic_runtime::Operator` conversion overhead, and paves the way for
allowing Peepmatic to support non-clif optimizations (e.g. vcode optimizations).
Rather than defining our own `peepmatic::Operator` type like we used to, now the
whole `peepmatic` crate is effectively generic over a `TOperator` type
parameter. For the Cranelift integration, we use `cranelift_codegen::ir::Opcode`
as the concrete type for our `TOperator` type parameter. For testing, we also
define a `TestOperator` type, so that we can test Peepmatic code without
building all of Cranelift, and we can keep them somewhat isolated from each
other.
The methods that `peepmatic::Operator` had are now translated into trait bounds
on the `TOperator` type. These traits need to be shared between all of
`peepmatic`, `peepmatic-runtime`, and `cranelift-codegen`'s Peepmatic
integration. Therefore, these new traits live in a new crate:
`peepmatic-traits`. This crate acts as a header file of sorts for shared
trait/type/macro definitions.
Additionally, the `peepmatic-runtime` crate no longer depends on the
`peepmatic-macro` procedural macro crate, which should lead to faster build
times for Cranelift when it is using pre-built peephole optimizers.
4 years ago
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "peepmatic-traits"
|
|
|
|
|
version = "0.68.0"
|
peepmatic: Be generic over the operator type
This lets us avoid the cost of `cranelift_codegen::ir::Opcode` to
`peepmatic_runtime::Operator` conversion overhead, and paves the way for
allowing Peepmatic to support non-clif optimizations (e.g. vcode optimizations).
Rather than defining our own `peepmatic::Operator` type like we used to, now the
whole `peepmatic` crate is effectively generic over a `TOperator` type
parameter. For the Cranelift integration, we use `cranelift_codegen::ir::Opcode`
as the concrete type for our `TOperator` type parameter. For testing, we also
define a `TestOperator` type, so that we can test Peepmatic code without
building all of Cranelift, and we can keep them somewhat isolated from each
other.
The methods that `peepmatic::Operator` had are now translated into trait bounds
on the `TOperator` type. These traits need to be shared between all of
`peepmatic`, `peepmatic-runtime`, and `cranelift-codegen`'s Peepmatic
integration. Therefore, these new traits live in a new crate:
`peepmatic-traits`. This crate acts as a header file of sorts for shared
trait/type/macro definitions.
Additionally, the `peepmatic-runtime` crate no longer depends on the
`peepmatic-macro` procedural macro crate, which should lead to faster build
times for Cranelift when it is using pre-built peephole optimizers.
4 years ago
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "pin-project-lite"
|
|
|
|
|
version = "0.1.11"
|
|
|
|
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
|
|
|
|
checksum = "c917123afa01924fc84bb20c4c03f004d9c38e5127e3c039bbf7f4b9c76a2f6b"
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "ppv-lite86"
|
|
|
|
|
version = "0.2.10"
|
|
|
|
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
|
|
|
|
checksum = "ac74c624d6b2d21f425f752262f42188365d7b8ff1aff74c82e45136510a4857"
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "pretty_env_logger"
|
|
|
|
|
version = "0.4.0"
|
|
|
|
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
|
|
|
|
checksum = "926d36b9553851b8b0005f1275891b392ee4d2d833852c417ed025477350fb9d"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"env_logger 0.7.1",
|
|
|
|
|
"log",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "proc-macro-error"
|
|
|
|
|
version = "1.0.4"
|
|
|
|
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
|
|
|
|
checksum = "da25490ff9892aab3fcf7c36f08cfb902dd3e71ca0f9f9517bea02a73a5ce38c"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"proc-macro-error-attr",
|
|
|
|
|
"proc-macro2",
|
|
|
|
|
"quote",
|
|
|
|
|
"syn",
|
|
|
|
|
"version_check",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "proc-macro-error-attr"
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name = "wasi-common"
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version = "0.21.0"
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dependencies = [
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"anyhow",
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"cfg-if 1.0.0",
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"cpu-time",
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"filetime",
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"getrandom 0.2.0",
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"lazy_static",
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"libc",
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"thiserror",
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"tracing",
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"wig",
|
It's wiggle time! (#1202)
* Use wiggle in place of wig in wasi-common
This is a rather massive commit that introduces `wiggle` into the
picture. We still use `wig`'s macro in `old` snapshot and to generate
`wasmtime-wasi` glue, but everything else is now autogenerated by `wiggle`.
In summary, thanks to `wiggle`, we no longer need to worry about
serialising and deserialising to and from the guest memory, and
all guest (WASI) types are now proper idiomatic Rust types.
While we're here, in preparation for the ephemeral snapshot, I went
ahead and reorganised the internal structure of the crate. Instead of
modules like `hostcalls_impl` or `hostcalls_impl::fs`, the structure
now resembles that in ephemeral with modules like `path`, `fd`, etc.
Now, I'm not requiring we leave it like this, but I reckon it looks
cleaner this way after all.
* Fix wig to use new first-class access to caller's mem
* Ignore warning in proc_exit for the moment
* Group unsafes together in args and environ calls
* Simplify pwrite; more unsafe blocks
* Simplify fd_read
* Bundle up unsafes in fd_readdir
* Simplify fd_write
* Add comment to path_readlink re zero-len buffers
* Simplify unsafes in random_get
* Hide GuestPtr<str> to &str in path::get
* Rewrite pread and pwrite using SeekFrom and read/write_vectored
I've left the implementation of VirtualFs pretty much untouched
as I don't feel that comfortable in changing the API too much.
Having said that, I reckon `pread` and `pwrite` could be refactored
out, and `preadv` and `pwritev` could be entirely rewritten using
`seek` and `read_vectored` and `write_vectored`.
* Add comment about VirtFs unsafety
* Fix all mentions of FdEntry to Entry
* Fix warnings on Win
* Add aux struct EntryTable responsible for Fds and Entries
This commit adds aux struct `EntryTable` which is private to `WasiCtx`
and is basically responsible for `Fd` alloc/dealloc as well as storing
matching `Entry`s. This struct is entirely private to `WasiCtx` and
as such as should remain transparent to `WasiCtx` users.
* Remove redundant check for empty buffer in path_readlink
* Preserve and rewind file cursor in pread/pwrite
* Use GuestPtr<[u8]>::copy_from_slice wherever copying bytes directly
* Use GuestPtr<[u8]>::copy_from_slice in fd_readdir
* Clean up unsafes around WasiCtx accessors
* Fix bugs in args_get and environ_get
* Fix conflicts after rebase
5 years ago
|
|
|
"wiggle",
|
|
|
|
|
"winapi",
|
|
|
|
|
"winx",
|
|
|
|
|
"yanix",
|
|
|
|
|
]
|
|
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[[package]]
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name = "wasm-smith"
|
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version = "0.1.10"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "bd5e4720bb44dc5e46a917139dc9dfa4bb6fee023bf9f77d2c55ec12eeaf9930"
|
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dependencies = [
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"arbitrary",
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"leb128",
|
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]
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[[package]]
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name = "wasmparser"
|
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version = "0.57.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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|
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[[package]]
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name = "wasmparser"
|
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[[package]]
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name = "wasmprinter"
|
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dependencies = [
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|
"anyhow",
|
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"wasmparser 0.66.0",
|
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|
]
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|
|
[[package]]
|
|
|
|
|
name = "wasmtime"
|
|
|
|
|
version = "0.21.0"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"anyhow",
|
|
|
|
|
"backtrace",
|
|
|
|
|
"bincode",
|
|
|
|
|
"cfg-if 1.0.0",
|
|
|
|
|
"lazy_static",
|
|
|
|
|
"libc",
|
|
|
|
|
"log",
|
|
|
|
|
"region",
|
|
|
|
|
"rustc-demangle",
|
|
|
|
|
"serde",
|
|
|
|
|
"smallvec",
|
|
|
|
|
"target-lexicon",
|
Improve robustness of cache loading/storing (#974)
* Improve robustness of cache loading/storing
Today wasmtime incorrectly loads compiled compiled modules from the
global cache when toggling settings such as optimizations. For example
if you execute `wasmtime foo.wasm` that will cache globally an
unoptimized version of the wasm module. If you then execute `wasmtime -O
foo.wasm` it would then reload the unoptimized version from cache, not
realizing the compilation settings were different, and use that instead.
This can lead to very surprising behavior naturally!
This commit updates how the cache is managed in an attempt to make it
much more robust against these sorts of issues. This takes a leaf out of
rustc's playbook and models the cache with a function that looks like:
fn load<T: Hash>(
&self,
data: T,
compute: fn(T) -> CacheEntry,
) -> CacheEntry;
The goal here is that it guarantees that all the `data` necessary to
`compute` the result of the cache entry is hashable and stored into the
hash key entry. This was previously open-coded and manually managed
where items were hashed explicitly, but this construction guarantees
that everything reasonable `compute` could use to compile the module is
stored in `data`, which is itself hashable.
This refactoring then resulted in a few workarounds and a few fixes,
including the original issue:
* The `Module` type was split into `Module` and `ModuleLocal` where only
the latter is hashed. The previous hash function for a `Module` left
out items like the `start_func` and didn't hash items like the imports
of the module. Omitting the `start_func` was fine since compilation
didn't actually use it, but omitting imports seemed uncomfortable
because while compilation didn't use the import values it did use the
*number* of imports, which seems like it should then be put into the
cache key. The `ModuleLocal` type now derives `Hash` to guarantee that
all of its contents affect the hash key.
* The `ModuleTranslationState` from `cranelift-wasm` doesn't implement
`Hash` which means that we have a manual wrapper to work around that.
This will be fixed with an upstream implementation, since this state
affects the generated wasm code. Currently this is just a map of
signatures, which is present in `Module` anyway, so we should be good
for the time being.
* Hashing `dyn TargetIsa` was also added, where previously it was not
fully hashed. Previously only the target name was used as part of the
cache key, but crucially the flags of compilation were omitted (for
example the optimization flags). Unfortunately the trait object itself
is not hashable so we still have to manually write a wrapper to hash
it, but we likely want to add upstream some utilities to hash isa
objects into cranelift itself. For now though we can continue to add
hashed fields as necessary.
Overall the goal here was to use the compiler to expose what we're not
hashing, and then make sure we organize data and write the right code to
ensure everything is hashed, and nothing more.
* Update crates/environ/src/module.rs
Co-Authored-By: Peter Huene <peterhuene@protonmail.com>
* Fix lightbeam
* Fix compilation of tests
* Update the expected structure of the cache
* Revert "Update the expected structure of the cache"
This reverts commit 2b53fee426a4e411c313d8c1e424841ba304a9cd.
* Separate the cache dir a bit
* Add a test the cache is busted with opt levels
* rustfmt
Co-authored-by: Peter Huene <peterhuene@protonmail.com>
5 years ago
|
|
|
"tempfile",
|
|
|
|
|
"wasmparser 0.66.0",
|
|
|
|
|
"wasmtime-cache",
|
|
|
|
|
"wasmtime-environ",
|
|
|
|
|
"wasmtime-jit",
|
|
|
|
|
"wasmtime-profiling",
|
|
|
|
|
"wasmtime-runtime",
|
|
|
|
|
"wasmtime-wasi",
|
|
|
|
|
"wat",
|
|
|
|
|
"winapi",
|
|
|
|
|
]
|
|
|
|
|
|
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|
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|
[[package]]
|
|
|
|
|
name = "wasmtime-c-api"
|
|
|
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|
version = "0.19.0"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"anyhow",
|
|
|
|
|
"env_logger 0.8.1",
|
|
|
|
|
"once_cell",
|
|
|
|
|
"wasi-common",
|
|
|
|
|
"wasmtime",
|
|
|
|
|
"wasmtime-c-api-macros",
|
|
|
|
|
"wasmtime-wasi",
|
|
|
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|
"wat",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "wasmtime-c-api-macros"
|
|
|
|
|
version = "0.19.0"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"proc-macro2",
|
|
|
|
|
"quote",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "wasmtime-cache"
|
|
|
|
|
version = "0.21.0"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"anyhow",
|
|
|
|
|
"base64 0.13.0",
|
|
|
|
|
"bincode",
|
|
|
|
|
"directories-next",
|
|
|
|
|
"errno",
|
|
|
|
|
"file-per-thread-logger",
|
|
|
|
|
"filetime",
|
|
|
|
|
"lazy_static",
|
|
|
|
|
"libc",
|
|
|
|
|
"log",
|
|
|
|
|
"more-asserts",
|
|
|
|
|
"pretty_env_logger",
|
|
|
|
|
"serde",
|
|
|
|
|
"sha2",
|
|
|
|
|
"tempfile",
|
|
|
|
|
"toml",
|
|
|
|
|
"winapi",
|
|
|
|
|
"zstd",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "wasmtime-cli"
|
|
|
|
|
version = "0.21.0"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"anyhow",
|
|
|
|
|
"env_logger 0.8.1",
|
|
|
|
|
"file-per-thread-logger",
|
|
|
|
|
"filecheck",
|
|
|
|
|
"humantime 2.0.1",
|
|
|
|
|
"libc",
|
externref: implement stack map-based garbage collection
For host VM code, we use plain reference counting, where cloning increments
the reference count, and dropping decrements it. We can avoid many of the
on-stack increment/decrement operations that typically plague the
performance of reference counting via Rust's ownership and borrowing system.
Moving a `VMExternRef` avoids mutating its reference count, and borrowing it
either avoids the reference count increment or delays it until if/when the
`VMExternRef` is cloned.
When passing a `VMExternRef` into compiled Wasm code, we don't want to do
reference count mutations for every compiled `local.{get,set}`, nor for
every function call. Therefore, we use a variation of **deferred reference
counting**, where we only mutate reference counts when storing
`VMExternRef`s somewhere that outlives the activation: into a global or
table. Simultaneously, we over-approximate the set of `VMExternRef`s that
are inside Wasm function activations. Periodically, we walk the stack at GC
safe points, and use stack map information to precisely identify the set of
`VMExternRef`s inside Wasm activations. Then we take the difference between
this precise set and our over-approximation, and decrement the reference
count for each of the `VMExternRef`s that are in our over-approximation but
not in the precise set. Finally, the over-approximation is replaced with the
precise set.
The `VMExternRefActivationsTable` implements the over-approximized set of
`VMExternRef`s referenced by Wasm activations. Calling a Wasm function and
passing it a `VMExternRef` moves the `VMExternRef` into the table, and the
compiled Wasm function logically "borrows" the `VMExternRef` from the
table. Similarly, `global.get` and `table.get` operations clone the gotten
`VMExternRef` into the `VMExternRefActivationsTable` and then "borrow" the
reference out of the table.
When a `VMExternRef` is returned to host code from a Wasm function, the host
increments the reference count (because the reference is logically
"borrowed" from the `VMExternRefActivationsTable` and the reference count
from the table will be dropped at the next GC).
For more general information on deferred reference counting, see *An
Examination of Deferred Reference Counting and Cycle Detection* by Quinane:
https://openresearch-repository.anu.edu.au/bitstream/1885/42030/2/hon-thesis.pdf
cc #929
Fixes #1804
4 years ago
|
|
|
"log",
|
|
|
|
|
"more-asserts",
|
|
|
|
|
"object",
|
|
|
|
|
"pretty_env_logger",
|
|
|
|
|
"rayon",
|
|
|
|
|
"structopt",
|
|
|
|
|
"target-lexicon",
|
|
|
|
|
"tempfile",
|
|
|
|
|
"test-programs",
|
|
|
|
|
"tracing-subscriber",
|
|
|
|
|
"wasi-common",
|
|
|
|
|
"wasmparser 0.66.0",
|
|
|
|
|
"wasmtime",
|
|
|
|
|
"wasmtime-cache",
|
|
|
|
|
"wasmtime-debug",
|
|
|
|
|
"wasmtime-environ",
|
|
|
|
|
"wasmtime-fuzzing",
|
|
|
|
|
"wasmtime-jit",
|
|
|
|
|
"wasmtime-obj",
|
|
|
|
|
"wasmtime-runtime",
|
|
|
|
|
"wasmtime-wasi",
|
|
|
|
|
"wasmtime-wast",
|
|
|
|
|
"wat",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "wasmtime-cranelift"
|
|
|
|
|
version = "0.21.0"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"cranelift-codegen",
|
|
|
|
|
"cranelift-entity",
|
|
|
|
|
"cranelift-frontend",
|
|
|
|
|
"cranelift-wasm",
|
|
|
|
|
"wasmtime-environ",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "wasmtime-debug"
|
|
|
|
|
version = "0.21.0"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"anyhow",
|
|
|
|
|
"gimli",
|
|
|
|
|
"more-asserts",
|
|
|
|
|
"object",
|
|
|
|
|
"target-lexicon",
|
|
|
|
|
"thiserror",
|
|
|
|
|
"wasmparser 0.66.0",
|
|
|
|
|
"wasmtime-environ",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "wasmtime-environ"
|
|
|
|
|
version = "0.21.0"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"anyhow",
|
|
|
|
|
"cfg-if 1.0.0",
|
|
|
|
|
"cranelift-codegen",
|
|
|
|
|
"cranelift-entity",
|
|
|
|
|
"cranelift-wasm",
|
|
|
|
|
"gimli",
|
|
|
|
|
"indexmap",
|
|
|
|
|
"log",
|
|
|
|
|
"more-asserts",
|
|
|
|
|
"serde",
|
|
|
|
|
"thiserror",
|
|
|
|
|
"wasmparser 0.66.0",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "wasmtime-fuzz"
|
|
|
|
|
version = "0.0.0"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"cranelift-codegen",
|
|
|
|
|
"cranelift-reader",
|
|
|
|
|
"cranelift-wasm",
|
|
|
|
|
"libfuzzer-sys",
|
|
|
|
|
"peepmatic-fuzzing",
|
|
|
|
|
"target-lexicon",
|
|
|
|
|
"wasm-smith",
|
|
|
|
|
"wasmtime",
|
|
|
|
|
"wasmtime-fuzzing",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "wasmtime-fuzzing"
|
|
|
|
|
version = "0.19.0"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"anyhow",
|
|
|
|
|
"arbitrary",
|
|
|
|
|
"env_logger 0.8.1",
|
|
|
|
|
"log",
|
|
|
|
|
"rayon",
|
|
|
|
|
"wasm-smith",
|
|
|
|
|
"wasmparser 0.66.0",
|
|
|
|
|
"wasmprinter",
|
|
|
|
|
"wasmtime",
|
|
|
|
|
"wasmtime-wast",
|
|
|
|
|
"wat",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "wasmtime-jit"
|
|
|
|
|
version = "0.21.0"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"anyhow",
|
|
|
|
|
"cfg-if 1.0.0",
|
|
|
|
|
"cranelift-codegen",
|
|
|
|
|
"cranelift-entity",
|
|
|
|
|
"cranelift-frontend",
|
|
|
|
|
"cranelift-native",
|
|
|
|
|
"cranelift-wasm",
|
|
|
|
|
"gimli",
|
|
|
|
|
"log",
|
|
|
|
|
"more-asserts",
|
|
|
|
|
"object",
|
|
|
|
|
"rayon",
|
|
|
|
|
"region",
|
|
|
|
|
"serde",
|
|
|
|
|
"target-lexicon",
|
|
|
|
|
"thiserror",
|
|
|
|
|
"wasmparser 0.66.0",
|
|
|
|
|
"wasmtime-cranelift",
|
|
|
|
|
"wasmtime-debug",
|
|
|
|
|
"wasmtime-environ",
|
|
|
|
|
"wasmtime-lightbeam",
|
|
|
|
|
"wasmtime-obj",
|
|
|
|
|
"wasmtime-profiling",
|
|
|
|
|
"wasmtime-runtime",
|
|
|
|
|
"winapi",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "wasmtime-lightbeam"
|
|
|
|
|
version = "0.21.0"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"cranelift-codegen",
|
|
|
|
|
"lightbeam",
|
|
|
|
|
"wasmparser 0.66.0",
|
|
|
|
|
"wasmtime-environ",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "wasmtime-obj"
|
|
|
|
|
version = "0.21.0"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"anyhow",
|
|
|
|
|
"more-asserts",
|
|
|
|
|
"object",
|
|
|
|
|
"target-lexicon",
|
|
|
|
|
"wasmtime-debug",
|
|
|
|
|
"wasmtime-environ",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "wasmtime-profiling"
|
|
|
|
|
version = "0.21.0"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"anyhow",
|
|
|
|
|
"cfg-if 1.0.0",
|
|
|
|
|
"gimli",
|
|
|
|
|
"ittapi-rs",
|
|
|
|
|
"lazy_static",
|
|
|
|
|
"libc",
|
|
|
|
|
"object",
|
|
|
|
|
"scroll",
|
|
|
|
|
"serde",
|
|
|
|
|
"target-lexicon",
|
|
|
|
|
"wasmtime-environ",
|
|
|
|
|
"wasmtime-runtime",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "wasmtime-runtime"
|
|
|
|
|
version = "0.21.0"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"backtrace",
|
|
|
|
|
"cc",
|
|
|
|
|
"cfg-if 1.0.0",
|
|
|
|
|
"indexmap",
|
|
|
|
|
"lazy_static",
|
|
|
|
|
"libc",
|
externref: implement stack map-based garbage collection
For host VM code, we use plain reference counting, where cloning increments
the reference count, and dropping decrements it. We can avoid many of the
on-stack increment/decrement operations that typically plague the
performance of reference counting via Rust's ownership and borrowing system.
Moving a `VMExternRef` avoids mutating its reference count, and borrowing it
either avoids the reference count increment or delays it until if/when the
`VMExternRef` is cloned.
When passing a `VMExternRef` into compiled Wasm code, we don't want to do
reference count mutations for every compiled `local.{get,set}`, nor for
every function call. Therefore, we use a variation of **deferred reference
counting**, where we only mutate reference counts when storing
`VMExternRef`s somewhere that outlives the activation: into a global or
table. Simultaneously, we over-approximate the set of `VMExternRef`s that
are inside Wasm function activations. Periodically, we walk the stack at GC
safe points, and use stack map information to precisely identify the set of
`VMExternRef`s inside Wasm activations. Then we take the difference between
this precise set and our over-approximation, and decrement the reference
count for each of the `VMExternRef`s that are in our over-approximation but
not in the precise set. Finally, the over-approximation is replaced with the
precise set.
The `VMExternRefActivationsTable` implements the over-approximized set of
`VMExternRef`s referenced by Wasm activations. Calling a Wasm function and
passing it a `VMExternRef` moves the `VMExternRef` into the table, and the
compiled Wasm function logically "borrows" the `VMExternRef` from the
table. Similarly, `global.get` and `table.get` operations clone the gotten
`VMExternRef` into the `VMExternRefActivationsTable` and then "borrow" the
reference out of the table.
When a `VMExternRef` is returned to host code from a Wasm function, the host
increments the reference count (because the reference is logically
"borrowed" from the `VMExternRefActivationsTable` and the reference count
from the table will be dropped at the next GC).
For more general information on deferred reference counting, see *An
Examination of Deferred Reference Counting and Cycle Detection* by Quinane:
https://openresearch-repository.anu.edu.au/bitstream/1885/42030/2/hon-thesis.pdf
cc #929
Fixes #1804
4 years ago
|
|
|
"log",
|
|
|
|
|
"memoffset 0.6.1",
|
|
|
|
|
"more-asserts",
|
|
|
|
|
"psm",
|
|
|
|
|
"region",
|
|
|
|
|
"thiserror",
|
|
|
|
|
"wasmtime-environ",
|
|
|
|
|
"winapi",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "wasmtime-rust"
|
|
|
|
|
version = "0.21.0"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"anyhow",
|
|
|
|
|
"wasmtime",
|
|
|
|
|
"wasmtime-rust-macro",
|
|
|
|
|
"wasmtime-wasi",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "wasmtime-rust-macro"
|
|
|
|
|
version = "0.21.0"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"proc-macro2",
|
|
|
|
|
"quote",
|
|
|
|
|
"syn",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "wasmtime-wasi"
|
|
|
|
|
version = "0.21.0"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"anyhow",
|
|
|
|
|
"tracing",
|
|
|
|
|
"wasi-common",
|
|
|
|
|
"wasmtime",
|
|
|
|
|
"wasmtime-runtime",
|
|
|
|
|
"wasmtime-wiggle",
|
|
|
|
|
"wig",
|
|
|
|
|
"wiggle",
|
|
|
|
|
]
|
|
|
|
|
|
|
|
|
|
[[package]]
|
|
|
|
|
name = "wasmtime-wast"
|
|
|
|
|
version = "0.21.0"
|
|
|
|
|
dependencies = [
|
|
|
|
|
"anyhow",
|
|
|
|
|
"wasmtime",
|
|
|
|
|
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[wasi-common]: move filetime module to yanix (#1255)
* Move filetime module to yanix
I've noticed that we could replace every occurrence of `crate::Result`
in `filetime` mods with `io::Result`, so I thought why not move it
to `yanix` and get rid off a lot of unnecessary code duplication
within `wasi-common`. Now, ideally I'd have our `filetime` modifications
backported to Alex's [`filetime`] crate, but one step at a time
(apologies Alex, I was meant to backport this ages ago, just didn't
find the time yet... :-().
Anyway, this commit does just that; i.e., moves the `filetime` modules
into `yanix` which seems a better fit for this type of code.
[`filetime`]: https://github.com/alexcrichton/filetime
There is one caveat here. On Emscripten, converting between `filetime::Filetime`
and `libc::timespec` appears to be lossy, at least as far as the
types are concerned. Now, `filetime::Filetime`'s seconds field is
`i64` while nanoseconds field is `u32`, while Emscripten's
`libc::timespec` requires both to be `i32` width. This might actually
not be a problem since I don't think it's possible to fill `filetime::Filetime`
struct with values of width wider than `i32` since Emscripten is 32bit
but just to be on the safe side, we do a `TryInto` conversion, log
the error (if any), and return `libc::EOVERFLOW`.
* Run cargo fmt
* Use i64::from instead of as cast
5 years ago
|
|
|
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