Updates the requirements on
[cbindgen](https://github.com/mozilla/cbindgen) to permit the latest
version.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/mozilla/cbindgen/releases">cbindgen's
releases</a>.</em></p>
<blockquote>
<h1>0.29.0</h1>
<ul>
<li>Support no-export annotation for statics and functions.</li>
<li>Fixed conditional fields of constexpr literal structs</li>
<li>Add rename rule for generated associated constant</li>
<li>Upgrade heck to 0.5</li>
<li>Add support for an optional nullable attribute</li>
<li>docs.md: Fix deprecated_with_note and deprecated_variant_with_note
being spelled as 'notes'</li>
<li>Fix generic with "void" default</li>
<li>Fixed error generation of structures using the keyword as inside
arrays</li>
<li>Added test for unsafe(no_mangle) attribute</li>
<li>Fixed handling of trait methods containing the unsafe attribute</li>
<li>Rename -Zparse-only</li>
</ul>
<h1>0.28.0</h1>
<ul>
<li>Parse unsafe attributes in <a
href="https://redirect.github.com/mozilla/cbindgen/pull/1020">mozilla/cbindgen#1020</a></li>
<li>Fix local override of enum prefix-with-name by jsgf in <a
href="https://redirect.github.com/mozilla/cbindgen/pull/1006">mozilla/cbindgen#1006</a></li>
<li>Add rename-all=prefix in <a
href="https://redirect.github.com/mozilla/cbindgen/pull/1021">mozilla/cbindgen#1021</a></li>
<li>ir: add support for UnsafeCell and SyncUnsafeCell by alekitto in <a
href="https://redirect.github.com/mozilla/cbindgen/pull/1003">mozilla/cbindgen#1003</a></li>
<li>Implement mangling for arrays in <a
href="https://redirect.github.com/mozilla/cbindgen/pull/1022">mozilla/cbindgen#1022</a></li>
<li>Fix: Ignore <code>CARGO_BUILD_TARGET</code> in tests by bryango in
<a
href="https://redirect.github.com/mozilla/cbindgen/pull/1010">mozilla/cbindgen#1010</a></li>
<li>Newline for each field for constexpr field constants by youknowone
in <a
href="https://redirect.github.com/mozilla/cbindgen/pull/988">mozilla/cbindgen#988</a></li>
<li>Fix clippy warnings by youknowone in <a
href="https://redirect.github.com/mozilla/cbindgen/pull/1026">mozilla/cbindgen#1026</a></li>
<li>Add aarch64/arm64 to CI by NickeZ in <a
href="https://redirect.github.com/mozilla/cbindgen/pull/1036">mozilla/cbindgen#1036</a></li>
<li>Add <code>unstable_ir</code> feature flag that makes the ir pub by
heesooy in <a
href="https://redirect.github.com/mozilla/cbindgen/pull/1011">mozilla/cbindgen#1011</a></li>
<li>Support generated a symbols file by TheElectronWill in <a
href="https://redirect.github.com/mozilla/cbindgen/pull/916">mozilla/cbindgen#916</a></li>
</ul>
<h1>0.27.0</h1>
<ul>
<li>Revert: The <code>Config</code> struct now has a private
member.</li>
<li>Allow users to specify a crate version for bindings generation (<a
href="https://redirect.github.com/mozilla/cbindgen/issues/901">#901</a>).</li>
<li>Update MSRV to 1.74 (<a
href="https://redirect.github.com/mozilla/cbindgen/issues/912">#912</a>,
<a
href="https://redirect.github.com/mozilla/cbindgen/issues/987">#987</a>).</li>
<li>Support #[deprecated] on enum variants (<a
href="https://redirect.github.com/mozilla/cbindgen/issues/933">#933</a>).</li>
<li>Support integrating the package_version information in a header file
comment (<a
href="https://redirect.github.com/mozilla/cbindgen/issues/939">#939</a>).</li>
<li>Add a language backend (<a
href="https://redirect.github.com/mozilla/cbindgen/issues/942">#942</a>).</li>
<li>Support generics with defaulted args (<a
href="https://redirect.github.com/mozilla/cbindgen/issues/959">#959</a>).</li>
<li>Add <code>VaList</code> compatibility (<a
href="https://redirect.github.com/mozilla/cbindgen/issues/970">#970</a>).</li>
</ul>
<h1>0.26.0</h1>
<ul>
<li>Fix swapping of <code>>>=</code> and <code><<=</code> in
constants.</li>
<li>Add support for #[deprecated] (<a
href="https://redirect.github.com/mozilla/cbindgen/issues/860">#860</a>).</li>
<li>Built-in support for bitflags 2.0.</li>
<li>Support for "C-unwind" ABI.</li>
<li>Generate bindings for non-public extern items if they are
#[no_mangle].</li>
</ul>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/mozilla/cbindgen/blob/master/CHANGES">cbindgen's
changelog</a>.</em></p>
<blockquote>
<h1>0.29.0</h1>
<pre><code> * Support no-export annotation for statics and functions.
* Fixed conditional fields of constexpr literal structs
* Add rename rule for generated associated constant
* Upgrade heck to 0.5
* Add support for an optional nullable attribute
* docs.md: Fix deprecated_with_note and deprecated_variant_with_note
being spelled as 'notes'
* Fix generic with "void" default
* Fixed error generation of structures using the keyword as inside
arrays
* Added test for unsafe(no_mangle) attribute
* Fixed handling of trait methods containing the unsafe attribute
* Rename -Zparse-only
</code></pre>
<h1>0.28.0</h1>
<pre><code> * Parse unsafe attributes in
https://github.com/mozilla/cbindgen/pull/1020
* Fix local override of enum prefix-with-name by jsgf in
https://github.com/mozilla/cbindgen/pull/1006
* Add rename-all=prefix in https://github.com/mozilla/cbindgen/pull/1021
* ir: add support for UnsafeCell and SyncUnsafeCell by alekitto in
https://github.com/mozilla/cbindgen/pull/1003
* Implement mangling for arrays in
https://github.com/mozilla/cbindgen/pull/1022
* Fix: Ignore `CARGO_BUILD_TARGET` in tests by bryango in
https://github.com/mozilla/cbindgen/pull/1010
* Newline for each field for constexpr field constants by youknowone in
https://github.com/mozilla/cbindgen/pull/988
* Fix clippy warnings by youknowone in
https://github.com/mozilla/cbindgen/pull/1026
* Add aarch64/arm64 to CI by NickeZ in
https://github.com/mozilla/cbindgen/pull/1036
* Add `unstable_ir` feature flag that makes the ir pub by heesooy in
https://github.com/mozilla/cbindgen/pull/1011
* Support generated a symbols file by TheElectronWill in
https://github.com/mozilla/cbindgen/pull/916
</code></pre>
<h1>0.27.0</h1>
<pre><code> * Revert: The `Config` struct now has a private member.
* Allow users to specify a crate version for bindings generation
([#901](https://github.com/mozilla/cbindgen/issues/901)).
* Update MSRV to 1.74
([#912](https://github.com/mozilla/cbindgen/issues/912),
[#987](https://github.com/mozilla/cbindgen/issues/987)).
* Support #[deprecated] on enum variants
([#933](https://github.com/mozilla/cbindgen/issues/933)).
* Support integrating the package_version information in a header file
comment ([#939](https://github.com/mozilla/cbindgen/issues/939)).
* Add a language backend
([#942](https://github.com/mozilla/cbindgen/issues/942)).
* Support generics with defaulted args
([#959](https://github.com/mozilla/cbindgen/issues/959)).
* Add `VaList` compatibility
([#970](https://github.com/mozilla/cbindgen/issues/970)).
</code></pre>
<h1>0.26.0</h1>
<pre><code> * Fix swapping of `>>=` and `<<=` in constants.
* Add support for #[deprecated]
([#860](https://github.com/mozilla/cbindgen/issues/860)).
* Built-in support for bitflags 2.0.
* Support for "C-unwind" ABI.
* Generate bindings for non-public extern items if they are
#[no_mangle].
</code></pre>
<h2>0.25.0</h2>
<pre><code> * Re-release of yanked 0.24.6 as a major release
</code></pre>
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conditional fields of constexpr literal structs</li>
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Upgrade heck to 0.5</li>
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Add support for an optional nullable attribute</li>
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docs.md: Fix deprecated_with_note and deprecated_variant_with_note being
spel...</li>
<li><a
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Fix generic with "void" default</li>
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Updates the requirements on
[criterion](https://github.com/bheisler/criterion.rs) to permit the
latest version.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
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<blockquote>
<h2>[0.6.0] - 2025-05-17</h2>
<h3>Changed</h3>
<ul>
<li>MSRV bumped to 1.80</li>
<li>The <code>real_blackbox</code> feature no longer has any impact.
Criterion always uses <code>std::hint::black_box()</code> now.
Users of <code>criterion::black_box()</code> should switch to
<code>std::hint::black_box()</code>.</li>
<li><code>clap</code> dependency unpinned.</li>
</ul>
<h3>Fixed</h3>
<ul>
<li>gnuplot version is now correctly detected when using certain Windows
binaries/configurations that used to fail</li>
</ul>
<h3>Added</h3>
<ul>
<li>Async benchmarking with Tokio may be done via a
<code>tokio::runtime::Handle</code>, not only a
<code>tokio::runtime::Runtime</code></li>
</ul>
<h2>[0.5.1] - 2023-05-26</h2>
<h3>Fixed</h3>
<ul>
<li>Quick mode (--quick) no longer crashes with measured times over 5
seconds when --noplot is not active</li>
</ul>
<h2>[0.5.0] - 2023-05-23</h2>
<h3>Changed</h3>
<ul>
<li>Replaced lazy_static dependency with once_cell</li>
<li>Improved documentation of the <code>html_reports</code> feature</li>
<li>Replaced atty dependency with is-terminal</li>
<li>MSRV bumped to 1.64</li>
<li>Upgraded clap dependency to v4</li>
<li>Upgraded tempfile dependency to v3.5.0</li>
</ul>
<h3>Fixed</h3>
<ul>
<li>Quick mode (<code>--quick</code>) no longer outputs 1ms for measured
times over 5 seconds</li>
<li>Documentation updates</li>
</ul>
<h2>[0.4.0] - 2022-09-10</h2>
<h3>Removed</h3>
<ul>
<li>The <code>Criterion::can_plot</code> function has been removed.</li>
<li>The <code>Criterion::bench_function_over_inputs</code> function has
been removed.</li>
<li>The <code>Criterion::bench_functions</code> function has been
removed.</li>
<li>The <code>Criterion::bench</code> function has been removed.</li>
</ul>
<h3>Changed</h3>
<ul>
<li>HTML report hidden behind non-default feature flag:
'html_reports'</li>
<li>Standalone support (ie without cargo-criterion) feature flag:
'cargo_bench_support'</li>
<li>MSRV bumped to 1.57</li>
<li><code>rayon</code> and <code>plotters</code> are optional (and
default) dependencies.</li>
<li>Status messages ('warming up', 'analyzing', etc) are printed to
stderr, benchmark results are printed to stdout.</li>
<li>Accept subsecond durations for <code>--warm-up-time</code>,
<code>--measurement-time</code> and <code>--profile-time</code>.</li>
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Co-authored-by: zach <zach@dylibso.com>
Here is a code snippet that demonstrates the issue:
```rust
use extism_pdk::{encoding, plugin_fn, FnResult, FromBytes, Json, ToBytes};
use serde::{Serialize, Deserialize};
#[derive(Deserialize,FromBytes)]
pub struct Input {
value:String
}
#[derive(Serialize, ToBytes)]
pub struct Output {
value: f64,
}
#[plugin_fn]
pub fn convert(in_value: Input) -> FnResult<Output> {
Ok(Output { value: in_value.value.parse().expect("Conversion failed") })
}
```
Because the structs don't derive `encoding` the rust-analyzer gives this
suggestion:
```
encoding needs to be specified
= try: `#[encoding(ToJson)]`
```
I don't think this suggestion is correct because i could not find
`ToJson` anywhere. Adding `#[encoding(Json)]` solves the issue (as
described in the docs).
The final code would look as follows:
```rust
use extism_pdk::{encoding, plugin_fn, FnResult, FromBytes, Json, ToBytes};
use serde::{Serialize, Deserialize};
#[derive(Deserialize,FromBytes)]
#[encoding(Json)]
pub struct Input {
value:String
}
#[derive(Serialize, ToBytes)]
#[encoding(Json)]
pub struct Output {
value: f64,
}
#[plugin_fn]
pub fn convert(in_value: Input) -> FnResult<Output> {
Ok(Output { value: in_value.value.parse().expect("Conversion failed") })
}
```
And compiles perfectly.
I think the suggestion given by the rust-analyzer is incorrect so i am
proposing a fix for this.
Since I'm new to the project, any feedback is appreciated.
Thanks!
_Alessandro Ruggiero_
I know that there is already a logging example in
`runtime/examples/log_callback.rs` but I think that's not where people
go to look to figure out how the logging functionality works. At least
for me that wasn't the case :)
Previously, code that called a plugin that called a host function that
called back into the plugin would hang in an attempt to attain the lock.
Switch to `try_lock` so we can surface the error.
Upgrades from wasmtime 26 to wasmtime 27-29, allowing us to support more
versions (including the possibility of supporting future releases
without changes)
This PR adds a function to get the fuel consumed by a plugin. This is
useful for systems that want to fairly balance compute. It's my first
time doing anything in rust so let me know if something needs
improvements!
---------
Co-authored-by: zach <zach@dylibso.com>
Closes https://github.com/extism/extism/issues/801
Updates the error from:
```
Unable to compile Extism plugin: incompatible import type for `extism:host/user::wrong_type`
```
to:
```
Unable to compile Extism plugin: types incompatible: expected type `(func (result i32))`, found type `(func (result i64))`
```
I wrap the `Plugin` instance in a `RwLock` and because `function_exists`
requires `&mut self`, I have to acquire a write lock everytime to just
check if a function exists, which causes lock contention.
This changes it to `&self` since it doesn't need to mutate.
`extism_compiled_plugin_new` would panic on bad manifest input (there's
a test in the python sdk [1] that hits this directly.) Catch the error and
set `errmsg` appropriately instead.
Additionally: golf the function pointer casting for the various `plugin_new` calls,
with the goal of reducing the number of allocations by leaning on iterator size
hints (and reducing the scope of `unsafe{}` use.) This part can be severed: it
introduces a breaking change. Previously `NULL` values were silently accepted in
the `functions**` list; now they fail. This maintains consistency with behavior on
"consumed" `ExtismFunction` pointer.
[1]: https://github.com/extism/python-sdk/blob/main/tests/test_extism.py#L50-L53
- Adds `extism:host/env::http_headers` to access HTTP response headers
- Adds `PluginBuilder::with_http_response_headers` to enable response
headers from Rust
- Adds `extism_plugin_allow_http_response_headers` to enable response
headers using the C API
TODO:
- [x] Update a PDK to use `extism:host/env::http_headers` so I can test
this
Updates the kernel to only scan for free blocks before a `memory.grow`
operation, this should improve performance of `alloc` by not iterating
over every block for each allocation.
An alternative to #763, this PR allows an initial `wasmtime::Config` to
be passed in when building a plugin. Some of these values may be
overwritten by the Extism runtime, but it allows for things like static
memory size and other low-level details to be handled directly instead
of us having to wrap every option ourselves.
- Checks error results to determine if a plugin ran out of fuel, if the
fuel is 0 after we get the error, then we return an out of fuel error
message instead.
- Updates `extism_plugin_error` to check `Plugin::error_msg` regardless
of the kernel's error state
Both [as_ptr][as_ptr] and [as_mut_ptr][as_mut_ptr] are allowed to return
a dangling raw pointer when the Vec size is 0.
The idea is that you should guard that read checking the size. This
probably works well in most cases, but at the very least in the
java-sdk, the JNA machinery tries to be helpful and it dereferences the
pointer, causing a SIGSEGV.
The solution is to check if the resulting vector is empty and return
null instead. A new, empty vector would be better, but I think that
would not solve the problem, because the problem is caused by a new,
empty vector in the first place.
Caveat: this might break consumers downstream.
On the other hand: consumers that do not check for the nInput, nOutput
counts are just waiting to explode, like JNA.
This addresses https://github.com/extism/java-sdk/issues/27
[as_ptr]:
https://doc.rust-lang.org/std/vec/struct.Vec.html#method.as_ptr
[as_mut_ptr]:
https://doc.rust-lang.org/std/vec/struct.Vec.html#method.as_mut_ptr
Signed-off-by: Edoardo Vacchi <evacchi@users.noreply.github.com>
Updates plugins to allocate a single `ExternRef` for the host context up
front, to avoid running into the `failed to allocate externref` error
from Wasmtime
