wasmer/src/apis/emscripten/mod.rs

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use crate::webassembly::{ImportObject, ImportValue};
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// EMSCRIPTEN APIS
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mod env;
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mod memory;
mod process;
mod io;
mod utils;
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mod syscalls;
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// SYSCALLS
use super::host;
pub use self::utils::is_emscripten_module;
pub fn generate_emscripten_env<'a, 'b>() -> ImportObject<&'a str, &'b str> {
let mut import_object = ImportObject::new();
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import_object.set("env", "printf", ImportValue::Func(io::printf as *const u8));
import_object.set("env", "putchar", ImportValue::Func(io::putchar as *const u8));
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// Emscripten Env
import_object.set("env", "_getenv", ImportValue::Func(env::_getenv as *const u8));
// Emscripten syscalls
import_object.set("env", "___syscall3", ImportValue::Func(syscalls::___syscall3 as *const u8));
import_object.set("env", "___syscall4", ImportValue::Func(syscalls::___syscall4 as *const u8));
import_object.set("env", "___syscall5", ImportValue::Func(syscalls::___syscall5 as *const u8));
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import_object.set("env", "___syscall54", ImportValue::Func(syscalls::___syscall54 as *const u8));
import_object.set("env", "___syscall122", ImportValue::Func(syscalls::___syscall122 as *const u8));
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// Emscripten other APIs
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import_object.set("env", "abort", ImportValue::Func(process::em_abort as *const u8));
import_object.set("env", "_abort", ImportValue::Func(process::_abort as *const u8));
import_object.set("env", "abortOnCannotGrowMemory", ImportValue::Func(process::abort_on_cannot_grow_memory as *const u8));
import_object.set("env", "_emscripten_memcpy_big", ImportValue::Func(memory::_emscripten_memcpy_big as *const u8));
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import_object.set("env", "enlargeMemory", ImportValue::Func(memory::enlarge_memory as *const u8));
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import_object.set("env", "getTotalMemory", ImportValue::Func(memory::get_total_memory as *const u8));
import_object
}
#[cfg(test)]
mod tests {
use super::generate_emscripten_env;
use crate::webassembly::{instantiate, Export, Instance};
#[test]
fn test_putchar() {
let wasm_bytes = include_wast2wasm_bytes!("tests/putchar.wast");
let import_object = generate_emscripten_env();
let result_object = instantiate(wasm_bytes, import_object).expect("Not compiled properly");
let func_index = match result_object.module.info.exports.get("main") {
Some(&Export::Function(index)) => index,
_ => panic!("Function not found"),
};
let main: fn(&Instance) = get_instance_function!(result_object.instance, func_index);
main(&result_object.instance);
}
#[test]
fn test_print() {
let wasm_bytes = include_wast2wasm_bytes!("tests/printf.wast");
let import_object = generate_emscripten_env();
let result_object = instantiate(wasm_bytes, import_object).expect("Not compiled properly");
let func_index = match result_object.module.info.exports.get("main") {
Some(&Export::Function(index)) => index,
_ => panic!("Function not found"),
};
let main: fn(&Instance) = get_instance_function!(result_object.instance, func_index);
main(&result_object.instance);
}
}