`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
Updates the requirements on [prost](https://github.com/tokio-rs/prost)
to permit the latest version.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/tokio-rs/prost/blob/master/CHANGELOG.md">prost's
changelog</a>.</em></p>
<blockquote>
<h1>Prost version 0.13.1</h1>
<p><em>PROST!</em> is a <a
href="https://developers.google.com/protocol-buffers/">Protocol
Buffers</a> implementation for the <a
href="https://www.rust-lang.org/">Rust Language</a>. <code>prost</code>
generates simple, idiomatic Rust code from <code>proto2</code> and
<code>proto3</code> files.</p>
<h2>Bug fixes</h2>
<ul>
<li>Enum variant named Error causes ambiguous item (<a
href="https://redirect.github.com/tokio-rs/prost/issues/1098">#1098</a>)</li>
</ul>
<h1>PROST version 0.13.0</h1>
<p><strong>note</strong>: this version was yanked in favor of 0.13.1</p>
<p><em>PROST!</em> is a <a
href="https://developers.google.com/protocol-buffers/">Protocol
Buffers</a> implementation for the <a
href="https://www.rust-lang.org/">Rust Language</a>. <code>prost</code>
generates simple, idiomatic Rust code from <code>proto2</code> and
<code>proto3</code> files.</p>
<p>This major update brings new features and fixes:</p>
<h2>Breaking changes</h2>
<ul>
<li>
<p>derive Copy trait for messages where possible (<a
href="https://redirect.github.com/tokio-rs/prost/issues/950">#950</a>)</p>
<p><code>prost-build</code> will automatically derive <code>trait
Copy</code> for some messages. If you manually implement
<code>Copy</code> you should remove your implementation.</p>
</li>
<li>
<p>Change generated functions signatures to remove type parameters (<a
href="https://redirect.github.com/tokio-rs/prost/issues/1045">#1045</a>)</p>
<p>The function signature of <code>trait Message</code> is changed to
use <code>impl Buf</code> instead of a named generic type. If you
implement <code>trait Message</code>, you should change the function
signature.</p>
</li>
<li>
<p>Lightweight error value in TryFrom<!-- raw HTML omitted --> for enums
(<a
href="https://redirect.github.com/tokio-rs/prost/issues/1010">#1010</a>)</p>
<p>When a <code>impl TryFrom<i32></code> is generated by
<code>prost</code> derive macros, it will now return the error type
<code>UnknownEnumValue</code> instead of <code>DecodeError</code>. The
new error can be used to retreive the integer value that failed to
convert.</p>
</li>
</ul>
<h2>Features</h2>
<ul>
<li>
<p>fix: Only touch include file if contents is changed (<a
href="https://redirect.github.com/tokio-rs/prost/issues/1058">#1058</a>)</p>
<p>Most generated files are untouched when the contents doesn't change.
Use the same mechanism for include file as well.</p>
</li>
</ul>
<h2>Dependencies</h2>
<ul>
<li>update env_logger requirement from 0.10 to 0.11 (<a
href="https://redirect.github.com/tokio-rs/prost/issues/1074">#1074</a>)</li>
<li>update criterion requirement from 0.4 to 0.5 (<a
href="https://redirect.github.com/tokio-rs/prost/issues/1071">#1071</a>)</li>
<li>Remove unused libz-sys (<a
href="https://redirect.github.com/tokio-rs/prost/issues/1077">#1077</a>)</li>
<li>build(deps): update itertools requirement from >=0.10, <!-- raw
HTML omitted -->=0.10, <=0.13 (<a
href="https://redirect.github.com/tokio-rs/prost/issues/1070">#1070</a>)</li>
</ul>
<h2>Documentation</h2>
<ul>
<li>better checking of tag duplicates, avoid discarding invalid variant
errs (<a
href="https://redirect.github.com/tokio-rs/prost/issues/951">#951</a>)</li>
<li>docs: Fix broken link warnings (<a
href="https://redirect.github.com/tokio-rs/prost/issues/1056">#1056</a>)</li>
<li>Add missing LICENSE symlink (<a
href="https://redirect.github.com/tokio-rs/prost/issues/1086">#1086</a>)</li>
</ul>
<h2>Internal</h2>
<ul>
<li>workspace package metadata (<a
href="https://redirect.github.com/tokio-rs/prost/issues/1036">#1036</a>)</li>
<li>fix: Build error due to merge conflict (<a
href="https://redirect.github.com/tokio-rs/prost/issues/1068">#1068</a>)</li>
<li>build: Fix release scripts (<a
href="https://redirect.github.com/tokio-rs/prost/issues/1055">#1055</a>)</li>
<li>chore: Add ci to check MSRV (<a
href="https://redirect.github.com/tokio-rs/prost/issues/1057">#1057</a>)</li>
</ul>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="f19104a3d4"><code>f19104a</code></a>
chore: prepare 0.13.1 release (<a
href="https://redirect.github.com/tokio-rs/prost/issues/1099">#1099</a>)</li>
<li><a
href="26463f437e"><code>26463f4</code></a>
fix: Enum variant named <code>Error</code> causes ambiguous item (<a
href="https://redirect.github.com/tokio-rs/prost/issues/1098">#1098</a>)</li>
<li><a
href="23f7174969"><code>23f7174</code></a>
chore: Release version 0.13.0 (<a
href="https://redirect.github.com/tokio-rs/prost/issues/1093">#1093</a>)</li>
<li><a
href="7a1424cf8c"><code>7a1424c</code></a>
build: Fix prepare-release.sh (<a
href="https://redirect.github.com/tokio-rs/prost/issues/1094">#1094</a>)</li>
<li><a
href="7790799b0d"><code>7790799</code></a>
build(deps): update itertools requirement from >=0.10, <=0.12 to
>=0.10, <=0....</li>
<li><a
href="4a0cc17102"><code>4a0cc17</code></a>
Add missing LICENSE symlink (<a
href="https://redirect.github.com/tokio-rs/prost/issues/1086">#1086</a>)</li>
<li><a
href="ae33a5ea97"><code>ae33a5e</code></a>
ci: Set rust version of clippy job to a fixed version (<a
href="https://redirect.github.com/tokio-rs/prost/issues/1090">#1090</a>)</li>
<li><a
href="ba77654083"><code>ba77654</code></a>
fix: Only touch include file if contents is changed (<a
href="https://redirect.github.com/tokio-rs/prost/issues/1058">#1058</a>)</li>
<li><a
href="e7049d3eb2"><code>e7049d3</code></a>
workspace package metadata (<a
href="https://redirect.github.com/tokio-rs/prost/issues/1036">#1036</a>)</li>
<li><a
href="ef4930c140"><code>ef4930c</code></a>
docs: Fix broken link warnings (<a
href="https://redirect.github.com/tokio-rs/prost/issues/1056">#1056</a>)</li>
<li>Additional commits viewable in <a
href="https://github.com/tokio-rs/prost/compare/v0.12.0...v0.13.1">compare
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Updates the requirements on
[cbindgen](https://github.com/mozilla/cbindgen) to permit the latest
version.
<details>
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<p><em>Sourced from <a
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<blockquote>
<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
* Update MSRV to 1.57
* Support variadic arguments (`...`)
([#805](https://github.com/mozilla/cbindgen/issues/805))
* Add --depfile option
([#820](https://github.com/mozilla/cbindgen/issues/820))
* Breaking changes: The `Config` struct now has a private member.
</code></pre>
<h2>0.24.6 (YANKED: depfile option was breaking, see <a
href="https://redirect.github.com/mozilla/cbindgen/issues/841">#841</a>)</h2>
<pre><code> * Update MSRV to 1.57
* Support variadic arguments (`...`)
([#805](https://github.com/mozilla/cbindgen/issues/805))
* Add --depfile option
([#820](https://github.com/mozilla/cbindgen/issues/820))
</code></pre>
<h2>0.24.5</h2>
<pre><code> * Don't enforce tempfile version.
</code></pre>
<h2>0.24.4</h2>
<pre><code> * Move expand infinite recursion fix
([#799](https://github.com/mozilla/cbindgen/issues/799))
* Add with_cpp_compat to the builder
([#796](https://github.com/mozilla/cbindgen/issues/796))
* Handle never type in return position consistently
([#780](https://github.com/mozilla/cbindgen/issues/780))
* Fix warnings ([#816](https://github.com/mozilla/cbindgen/issues/816),
[#819](https://github.com/mozilla/cbindgen/issues/819))
* Updated documentation
([#788](https://github.com/mozilla/cbindgen/issues/788),
[#791](https://github.com/mozilla/cbindgen/issues/791),
[#792](https://github.com/mozilla/cbindgen/issues/792),
[#810](https://github.com/mozilla/cbindgen/issues/810),
[#823](https://github.com/mozilla/cbindgen/issues/823))
</code></pre>
<h2>0.24.3</h2>
<pre><code> * Make struct expressions correctly generated through
typedefs ([#768](https://github.com/mozilla/cbindgen/issues/768)).
</code></pre>
<h2>0.24.2</h2>
<!-- raw HTML omitted -->
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Bump MSRV again for clap.</li>
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Cargo update and version bump.</li>
<li><a
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Update CHANGES since v0.26.0</li>
<li><a
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Output condition for globals.</li>
<li><a
href="e469e44c00"><code>e469e44</code></a>
Add missing parens to log message</li>
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Update cython expectations from the previous patch.</li>
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Fix variadic arguments when used in function pointer</li>
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deps: Update syn to 2.0</li>
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Generalize Item to expose documentation and generic params</li>
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Used documented method of specifying variadic arguments</li>
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This is a rough POC for allowing people to whitelist a dir as readonly.
When the source path is prefixed with `ro:`, the dir is considered as
readonly. This preserved backward compatibility. This suggestion came up
in https://github.com/extism/go-sdk/pull/1#discussion_r1276700587
Readonly:
```rs
let manifest = Manifest::new([url])
.with_allowed_path("ro:D:/x/rust/fs/data".to_string(), "/data")
.with_config_key("path", "/data/data.txt");
```
```
trying to read file:
"Hello World at 1719851282.5109031sHello World at 1719851299.0819795sHello World at 1719851317.8934608s\n"
-----------------------------------------------------
trying to write file:
thread '<unnamed>' panicked at src\lib.rs:24:34:
called `Result::unwrap()` on an `Err` value: Os { code: 58, kind: Unsupported, message: "Not supported" }
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
thread 'main' panicked at runtime\examples\fs.rs:27:6:
called `Result::unwrap()` on an `Err` value: error while executing at wasm backtrace:
0: 0x234d2 - fs.wasm!__rust_start_panic
1: 0x232a1 - fs.wasm!rust_panic
2: 0x231da - fs.wasm!std::panicking::rust_panic_with_hook::hd3fb69bc0aea298a
3: 0x22467 - fs.wasm!std::panicking::begin_panic_handler::{{closure}}::h4d99b90b43f79472
4: 0x223ca - fs.wasm!std::sys_common::backtrace::__rust_end_short_backtrace::h5691573a73161cb1
5: 0x22bca - fs.wasm!rust_begin_unwind
6: 0x303e9 - fs.wasm!core::panicking::panic_fmt::hdb62f5cdb45533e4
7: 0x3234d - fs.wasm!core::result::unwrap_failed::h30d23efcc9e41efc
8: 0x36c2 - fs.wasm!fs::try_write::inner::h0b3b0df8e129f5cc
9: 0x29cd - fs.wasm!try_write
10: 0x35e4a - fs.wasm!try_write.command_export
note: using the `WASMTIME_BACKTRACE_DETAILS=1` environment variable may show more debugging information
Caused by:
wasm trap: wasm `unreachable` instruction executed
Stack backtrace:
0: std::backtrace_rs::backtrace::dbghelp64::trace
at /rustc/9b00956e56009bab2aa15d7bff10916599e3d6d6/library\std\src\..\..\backtrace\src\backtrace\dbghelp64.rs:99
1: std::backtrace_rs::backtrace::trace_unsynchronized
at /rustc/9b00956e56009bab2aa15d7bff10916599e3d6d6/library\std\src\..\..\backtrace\src\backtrace\mod.rs:66
2: std::backtrace::Backtrace::create
at /rustc/9b00956e56009bab2aa15d7bff10916599e3d6d6/library\std\src\backtrace.rs:331
3: std::backtrace::Backtrace::capture
at /rustc/9b00956e56009bab2aa15d7bff10916599e3d6d6/library\std\src\backtrace.rs:296
4: anyhow::error::impl$1::from<wasmtime_environ::trap_encoding::Trap>
at C:\Users\muham\.cargo\registry\src\index.crates.io-6f17d22bba15001f\anyhow-1.0.86\src\error.rs:565
5: core::convert::impl$3::into<wasmtime_environ::trap_encoding::Trap,anyhow::Error>
at /rustc/9b00956e56009bab2aa15d7bff10916599e3d6d6\library\core\src\convert\mod.rs:759
6: wasmtime_environ::impl$1::into_anyhow<wasmtime_environ::trap_encoding::Trap>
at C:\Users\muham\.cargo\registry\src\index.crates.io-6f17d22bba15001f\wasmtime-environ-22.0.0\src\lib.rs:90
7: wasmtime::runtime::trap::from_runtime_box
at C:\Users\muham\.cargo\registry\src\index.crates.io-6f17d22bba15001f\wasmtime-22.0.0\src\runtime\trap.rs:118
8: wasmtime::runtime::func::invoke_wasm_and_catch_traps::closure$0<extism::current_plugin::CurrentPlugin,wasmtime::runtime::func::impl$1::call_unchecked_raw::closure_env$0<extism::current_plugin::CurrentPlugin> >
at C:\Users\muham\.cargo\registry\src\index.crates.io-6f17d22bba15001f\wasmtime-22.0.0\src\runtime\func.rs:1597
9: enum2$<core::result::Result<tuple$<>,alloc::boxed::Box<wasmtime::runtime::vm::traphandlers::Trap,alloc::alloc::Global> > >::map_err<tuple$<>,alloc::boxed::Box<wasmtime::runtime::vm::traphandlers::Trap,alloc::alloc::Global>,anyhow::Error,wasmtime::runtime:
at /rustc/9b00956e56009bab2aa15d7bff10916599e3d6d6\library\core\src\result.rs:829
10: wasmtime::runtime::func::invoke_wasm_and_catch_traps<extism::current_plugin::CurrentPlugin,wasmtime::runtime::func::impl$1::call_unchecked_raw::closure_env$0<extism::current_plugin::CurrentPlugin> >
at C:\Users\muham\.cargo\registry\src\index.crates.io-6f17d22bba15001f\wasmtime-22.0.0\src\runtime\func.rs:1597
11: wasmtime::runtime::func::Func::call_unchecked_raw<extism::current_plugin::CurrentPlugin>
at C:\Users\muham\.cargo\registry\src\index.crates.io-6f17d22bba15001f\wasmtime-22.0.0\src\runtime\func.rs:1063
12: wasmtime::runtime::func::Func::call_unchecked<ref_mut$<wasmtime::runtime::store::context::StoreContextMut<extism::current_plugin::CurrentPlugin> > >
at C:\Users\muham\.cargo\registry\src\index.crates.io-6f17d22bba15001f\wasmtime-22.0.0\src\runtime\func.rs:1049
13: wasmtime::runtime::func::Func::call_impl_do_call<extism::current_plugin::CurrentPlugin>
at C:\Users\muham\.cargo\registry\src\index.crates.io-6f17d22bba15001f\wasmtime-22.0.0\src\runtime\func.rs:1243
14: wasmtime::runtime::func::Func::call<ref_mut$<wasmtime::runtime::store::Store<extism::current_plugin::CurrentPlugin> > >
at C:\Users\muham\.cargo\registry\src\index.crates.io-6f17d22bba15001f\wasmtime-22.0.0\src\runtime\func.rs:1002
15: extism::plugin::Plugin::raw_call<ref$<str$>,ref$<str$> >
at .\src\plugin.rs:753
16: extism::plugin::Plugin::call<ref$<str$>,ref$<str$>,ref$<str$> >
at .\src\plugin.rs:900
17: fs::main
at .\examples\fs.rs:25
18: core::ops::function::FnOnce::call_once<void (*)(),tuple$<> >
at /rustc/9b00956e56009bab2aa15d7bff10916599e3d6d6\library\core\src\ops\function.rs:250
19: core::hint::black_box
at /rustc/9b00956e56009bab2aa15d7bff10916599e3d6d6\library\core\src\hint.rs:337
20: std::sys_common::backtrace::__rust_begin_short_backtrace<void (*)(),tuple$<> >
at /rustc/9b00956e56009bab2aa15d7bff10916599e3d6d6\library\std\src\sys_common\backtrace.rs:155
21: std::rt::lang_start::closure$0<tuple$<> >
at /rustc/9b00956e56009bab2aa15d7bff10916599e3d6d6\library\std\src\rt.rs:166
22: std::rt::lang_start_internal
at /rustc/9b00956e56009bab2aa15d7bff10916599e3d6d6/library\std\src\rt.rs:148
23: std::rt::lang_start<tuple$<> >
at /rustc/9b00956e56009bab2aa15d7bff10916599e3d6d6\library\std\src\rt.rs:165
24: main
25: invoke_main
at D:\a\_work\1\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:78
26: __scrt_common_main_seh
at D:\a\_work\1\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288
27: BaseThreadInitThunk
28: RtlUserThreadStart
stack backtrace:
0: std::panicking::begin_panic_handler
at /rustc/9b00956e56009bab2aa15d7bff10916599e3d6d6/library\std\src\panicking.rs:645
1: core::panicking::panic_fmt
at /rustc/9b00956e56009bab2aa15d7bff10916599e3d6d6/library\core\src\panicking.rs:72
2: core::result::unwrap_failed
at /rustc/9b00956e56009bab2aa15d7bff10916599e3d6d6/library\core\src\result.rs:1654
3: enum2$<core::result::Result<ref$<str$>,anyhow::Error> >::unwrap
at /rustc/9b00956e56009bab2aa15d7bff10916599e3d6d6\library\core\src\result.rs:1077
4: fs::main
at .\examples\fs.rs:25
5: core::ops::function::FnOnce::call_once<void (*)(),tuple$<> >
at /rustc/9b00956e56009bab2aa15d7bff10916599e3d6d6\library\core\src\ops\function.rs:250
6: core::hint::black_box
at /rustc/9b00956e56009bab2aa15d7bff10916599e3d6d6\library\core\src\hint.rs:337
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
error: process didn't exit successfully: `D:\dylibso\extism\target\debug\examples\fs.exe` (exit code: 101)
```
Writable:
```rs
let manifest = Manifest::new([url])
.with_allowed_path("D:/x/rust/fs/data".to_string(), "/data")
.with_config_key("path", "/data/data.txt");
```
```
trying to read file:
"Hello World at 1719851282.5109031sHello World at 1719851299.0819795sHello World at 1719851317.8934608s\n"
-----------------------------------------------------
trying to write file:
"Hello World at 1719851282.5109031sHello World at 1719851299.0819795sHello World at 1719851317.8934608s\nHello World at 1719851500.7803263s\n"
done!
```
- Breaking: No longer copies Extism config values into WASI environment
variables because the new interface doesn't allow for the environment to
be updated - these should be accessed using the Extism config functions
instead
- Requires wasmtime 20 or greater
- Enables wasm-gc
- Similar to https://github.com/extism/extism/pull/697 without sockets
or additional support for command modules
