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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,31 @@ | ||
| <p align="center"> | ||
| <a href="https://wasmer.io" target="_blank" rel="noopener noreferrer"> | ||
| <img width="400" src="https://raw.githubusercontent.com/wasmerio/wasmer/master/logo.png" alt="Wasmer logo"> | ||
| </a> | ||
| </p> | ||
|
|
||
| <p align="center"> | ||
| <a href="https://circleci.com/gh/wasmerio/wasmer/"> | ||
| <img src="https://img.shields.io/circleci/project/github/wasmerio/wasmer/master.svg" alt="Build Status"> | ||
| </a> | ||
| <a href="https://github.com/wasmerio/wasmer/blob/master/LICENSE"> | ||
| <img src="https://img.shields.io/github/license/wasmerio/wasmer.svg" alt="License"> | ||
| </a> | ||
| <a href="https://spectrum.chat/wasmer"> | ||
| <img src="https://withspectrum.github.io/badge/badge.svg" alt="Join the Wasmer Community"> | ||
| </a> | ||
| <a href="https://crates.io/crates/wasmer-clif-backend"> | ||
| <img src="https://img.shields.io/crates/d/wasmer-clif-backend.svg" alt="Number of downloads from crates.io"> | ||
| </a> | ||
| <a href="https://docs.rs/wasmer-clif-backend"> | ||
| <img src="https://docs.rs/wasmer-clif-backend/badge.svg" alt="Read our API documentation"> | ||
| </a> | ||
| </p> | ||
|
|
||
| # Wasmer Cranelift backend | ||
|
|
||
| Wasmer is a standalone JIT WebAssembly runtime, aiming to be fully | ||
| compatible with Emscripten, Rust and Go. [Learn | ||
| more](https://github.com/wasmerio/wasmer). | ||
|
|
||
| This crate represents the Cranelift backend. |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,31 @@ | ||
| <p align="center"> | ||
| <a href="https://wasmer.io" target="_blank" rel="noopener noreferrer"> | ||
| <img width="400" src="https://raw.githubusercontent.com/wasmerio/wasmer/master/logo.png" alt="Wasmer logo"> | ||
| </a> | ||
| </p> | ||
|
|
||
| <p align="center"> | ||
| <a href="https://circleci.com/gh/wasmerio/wasmer/"> | ||
| <img src="https://img.shields.io/circleci/project/github/wasmerio/wasmer/master.svg" alt="Build Status"> | ||
| </a> | ||
| <a href="https://github.com/wasmerio/wasmer/blob/master/LICENSE"> | ||
| <img src="https://img.shields.io/github/license/wasmerio/wasmer.svg" alt="License"> | ||
| </a> | ||
| <a href="https://spectrum.chat/wasmer"> | ||
| <img src="https://withspectrum.github.io/badge/badge.svg" alt="Join the Wasmer Community"> | ||
| </a> | ||
| <a href="https://crates.io/crates/wasmer-dynasm-backend"> | ||
| <img src="https://img.shields.io/crates/d/wasmer-dynasm-backend.svg" alt="Number of downloads from crates.io"> | ||
| </a> | ||
| <a href="https://docs.rs/wasmer-dynasm-backend"> | ||
| <img src="https://docs.rs/wasmer-dynasm-backend/badge.svg" alt="Read our API documentation"> | ||
| </a> | ||
| </p> | ||
|
|
||
| # Wasmer dynasm backend | ||
|
|
||
| Wasmer is a standalone JIT WebAssembly runtime, aiming to be fully | ||
| compatible with Emscripten, Rust and Go. [Learn | ||
| more](https://github.com/wasmerio/wasmer). | ||
|
|
||
| This crate represents the dynasm backend. |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,31 @@ | ||
| <p align="center"> | ||
| <a href="https://wasmer.io" target="_blank" rel="noopener noreferrer"> | ||
| <img width="400" src="https://raw.githubusercontent.com/wasmerio/wasmer/master/logo.png" alt="Wasmer logo"> | ||
| </a> | ||
| </p> | ||
|
|
||
| <p align="center"> | ||
| <a href="https://circleci.com/gh/wasmerio/wasmer/"> | ||
| <img src="https://img.shields.io/circleci/project/github/wasmerio/wasmer/master.svg" alt="Build Status"> | ||
| </a> | ||
| <a href="https://github.com/wasmerio/wasmer/blob/master/LICENSE"> | ||
| <img src="https://img.shields.io/github/license/wasmerio/wasmer.svg" alt="License"> | ||
| </a> | ||
| <a href="https://spectrum.chat/wasmer"> | ||
| <img src="https://withspectrum.github.io/badge/badge.svg" alt="Join the Wasmer Community"> | ||
| </a> | ||
| <a href="https://crates.io/crates/wasmer-llvm-backend"> | ||
| <img src="https://img.shields.io/crates/d/wasmer-llvm-backend.svg" alt="Number of downloads from crates.io"> | ||
| </a> | ||
| <a href="https://docs.rs/wasmer-llvm-backend"> | ||
| <img src="https://docs.rs/wasmer-llvm-backend/badge.svg" alt="Read our API documentation"> | ||
| </a> | ||
| </p> | ||
|
|
||
| # Wasmer LLVM backend | ||
|
|
||
| Wasmer is a standalone JIT WebAssembly runtime, aiming to be fully | ||
| compatible with Emscripten, Rust and Go. [Learn | ||
| more](https://github.com/wasmerio/wasmer). | ||
|
|
||
| This crate represents the LLVM backend. |
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| //! Errors. | ||
| use libc::{c_char, c_int}; | ||
| use std::cell::RefCell; | ||
| use std::error::Error; | ||
| use std::fmt::{self, Display, Formatter}; | ||
| use std::ptr; | ||
| use std::slice; | ||
|
|
||
| thread_local! { | ||
| static LAST_ERROR: RefCell<Option<Box<Error>>> = RefCell::new(None); | ||
| } | ||
|
|
||
| pub(crate) fn update_last_error<E: Error + 'static>(err: E) { | ||
| LAST_ERROR.with(|prev| { | ||
| *prev.borrow_mut() = Some(Box::new(err)); | ||
| }); | ||
| } | ||
|
|
||
| /// Retrieve the most recent error, clearing it in the process. | ||
| pub(crate) fn take_last_error() -> Option<Box<Error>> { | ||
| LAST_ERROR.with(|prev| prev.borrow_mut().take()) | ||
| } | ||
|
|
||
| /// Gets the length in bytes of the last error. | ||
| /// This can be used to dynamically allocate a buffer with the correct number of | ||
| /// bytes needed to store a message. | ||
| /// | ||
| /// # Example | ||
| /// | ||
| /// ```c | ||
| /// int error_len = wasmer_last_error_length(); | ||
| /// char *error_str = malloc(error_len); | ||
| /// ``` | ||
| #[no_mangle] | ||
| pub extern "C" fn wasmer_last_error_length() -> c_int { | ||
| LAST_ERROR.with(|prev| match *prev.borrow() { | ||
| Some(ref err) => err.to_string().len() as c_int + 1, | ||
| None => 0, | ||
| }) | ||
| } | ||
|
|
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| /// Stores the last error message into the provided buffer up to the given `length`. | ||
| /// The `length` parameter must be large enough to store the last error message. | ||
| /// | ||
| /// Returns the length of the string in bytes. | ||
| /// Returns `-1` if an error occurs. | ||
| /// | ||
| /// # Example | ||
| /// | ||
| /// ```c | ||
| /// int error_len = wasmer_last_error_length(); | ||
| /// char *error_str = malloc(error_len); | ||
| /// wasmer_last_error_message(error_str, error_len); | ||
| /// printf("Error str: `%s`\n", error_str); | ||
| /// ``` | ||
| #[no_mangle] | ||
| pub unsafe extern "C" fn wasmer_last_error_message(buffer: *mut c_char, length: c_int) -> c_int { | ||
| if buffer.is_null() { | ||
| // buffer pointer is null | ||
| return -1; | ||
| } | ||
|
|
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| let last_error = match take_last_error() { | ||
| Some(err) => err, | ||
| None => return 0, | ||
| }; | ||
|
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| let error_message = last_error.to_string(); | ||
|
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| let buffer = slice::from_raw_parts_mut(buffer as *mut u8, length as usize); | ||
|
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| if error_message.len() >= buffer.len() { | ||
| // buffer to small for err message | ||
| return -1; | ||
| } | ||
|
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| ptr::copy_nonoverlapping( | ||
| error_message.as_ptr(), | ||
| buffer.as_mut_ptr(), | ||
| error_message.len(), | ||
| ); | ||
|
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| // Add a trailing null so people using the string as a `char *` don't | ||
| // accidentally read into garbage. | ||
| buffer[error_message.len()] = 0; | ||
|
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| error_message.len() as c_int | ||
| } | ||
|
|
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| #[derive(Debug)] | ||
| pub(crate) struct CApiError { | ||
| pub(crate) msg: String, | ||
| } | ||
|
|
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| impl Display for CApiError { | ||
| fn fmt(&self, f: &mut Formatter) -> fmt::Result { | ||
| write!(f, "{}", &self.msg) | ||
| } | ||
| } | ||
|
|
||
| impl Error for CApiError {} |
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