/
memory.rs
41 lines (37 loc) 路 1.18 KB
/
memory.rs
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use super::process::abort_with_message;
use crate::webassembly::Instance;
use libc::{c_void, memcpy, size_t};
/// emscripten: _emscripten_memcpy_big
pub extern "C" fn _emscripten_memcpy_big(
dest: u32,
src: u32,
len: u32,
instance: &mut Instance,
) -> u32 {
debug!(
"emscripten::_emscripten_memcpy_big {}, {}, {}",
dest, src, len
);
let dest_addr = instance.memory_offset_addr(0, dest as usize) as *mut c_void;
let src_addr = instance.memory_offset_addr(0, src as usize) as *mut c_void;
unsafe {
memcpy(dest_addr, src_addr, len as size_t);
}
dest
}
/// emscripten: getTotalMemory
pub extern "C" fn get_total_memory(_instance: &mut Instance) -> u32 {
debug!("emscripten::get_total_memory");
// instance.memories[0].current_pages()
16_777_216
}
/// emscripten: enlargeMemory
pub extern "C" fn enlarge_memory(_instance: &mut Instance) {
debug!("emscripten::enlarge_memory");
// instance.memories[0].grow(100);
}
/// emscripten: abortOnCannotGrowMemory
pub extern "C" fn abort_on_cannot_grow_memory() {
debug!("emscripten::abort_on_cannot_grow_memory");
abort_with_message("Cannot enlarge memory arrays!");
}