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work around allocation of size 0

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Folkert 2023-03-06 21:12:04 +01:00
parent 53db40e2f4
commit 86671d659c
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GPG key ID: 1F17F6FFD112B97C
1 changed files with 19 additions and 9 deletions
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10
examples/cli/false-interpreter/platform/src/lib.rs
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@ -134,6 +134,15 @@ pub extern "C" fn rust_main() -> i32 {
unsafe fn call_the_closure(closure_data_ptr: *const u8) -> i64 { unsafe fn call_the_closure(closure_data_ptr: *const u8) -> i64 {
let size = size_Fx_result() as usize; let size = size_Fx_result() as usize;
if size == 0 {
call_Fx(
// This flags pointer will never get dereferenced
MaybeUninit::uninit().as_ptr(),
closure_data_ptr as *const u8,
std::ptr::null_mut(),
);
} else {
let layout = Layout::array::<u8>(size).unwrap(); let layout = Layout::array::<u8>(size).unwrap();
let buffer = std::alloc::alloc(layout) as *mut u8; let buffer = std::alloc::alloc(layout) as *mut u8;
@ -145,6 +154,7 @@ unsafe fn call_the_closure(closure_data_ptr: *const u8) -> i64 {
); );
std::alloc::dealloc(buffer, layout); std::alloc::dealloc(buffer, layout);
}
0 0
} }