language-servers/roc
1
0
Fork 0
mirror of https://github.com/roc-lang/roc.git synced 2025-10-01 07:41:12 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 6

Fix rust host with surgical linking

Browse source
This commit is contained in:
Brendan Hansknecht 2021-09-24 21:37:07 -07:00
parent eae8a2ea37
commit 411ed58eec
16 changed files with 920 additions and 67 deletions
Download patch file Download diff file Expand all files Collapse all files

51
examples/hello-rust/platform/src/main.rs Normal file
View file

@ -0,0 +1,51 @@
use core::ffi::c_void;
fn main() {
let mut result = host::rust_main();
// This is stupid code that does nothing to avoid rust optimizing functions that roc needs away.
if result == 0x1234_5678_9ABC_DEF0 {
let roc_alloc_ptr: isize = unsafe {
std::mem::transmute(
host::roc_alloc as *const unsafe extern "C" fn(usize, u32) -> *mut c_void,
)
};
let roc_realloc_ptr: isize = unsafe {
std::mem::transmute(
host::roc_realloc
as *const unsafe extern "C" fn(*mut c_void, usize, usize, u32) -> *mut c_void,
)
};
let roc_dealloc_ptr: isize = unsafe {
std::mem::transmute(host::roc_dealloc as *const unsafe extern "C" fn(*mut c_void, u32))
};
let roc_panic_ptr: isize = unsafe {
std::mem::transmute(host::roc_panic as *const unsafe extern "C" fn(*mut c_void, u32))
};
let roc_memcpy_ptr: isize = unsafe {
std::mem::transmute(
host::roc_memcpy
as *const unsafe extern "C" fn(*mut c_void, *mut c_void, usize) -> *mut c_void,
)
};
let roc_memset_ptr: isize = unsafe {
std::mem::transmute(
host::roc_memset
as *const unsafe extern "C" fn(*mut c_void, i32, usize) -> *mut c_void,
)
};
// I really want to use the equivalent of std::hint::black_box, but it is expirimental.
result = result ^ roc_alloc_ptr;
result = result ^ roc_realloc_ptr;
result = result ^ roc_dealloc_ptr;
result = result ^ roc_panic_ptr;
result = result ^ roc_memcpy_ptr;
result = result ^ roc_memset_ptr;
result = result ^ roc_alloc_ptr;
result = result ^ roc_realloc_ptr;
result = result ^ roc_dealloc_ptr;
result = result ^ roc_panic_ptr;
result = result ^ roc_memcpy_ptr;
result = result ^ roc_memset_ptr;
}
std::process::exit(result as i32);
}