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return error if allocate returns 0

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vms 2021-04-25 01:04:23 +03:00
parent 39dca73210
commit 4a41d36c52
2 changed files with 8 additions and 0 deletions
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3
crates/it-lilo/src/lowerer/error.rs
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@ -20,6 +20,9 @@ use thiserror::Error as ThisError;
#[derive(Debug, ThisError)]
pub enum LoError {
#[error("Allocator of Wasm module returns 0 which means that it's out of memory")]
AllocateWasInvalid,
#[error("{0}")]
AllocatableError(#[from] AllocatableError),

5
crates/it-lilo/src/lowerer/memory_writer.rs
View File

@ -21,6 +21,7 @@ use crate::traits::DEFAULT_MEMORY_INDEX;
use crate::utils::type_tag_form_itype;
use std::cell::Cell;
use crate::lowerer::LoError;
pub struct MemoryWriter<'i, R: Allocatable> {
heap_manager: &'i R,
@ -54,6 +55,10 @@ impl<'i, A: Allocatable> MemoryWriter<'i, A> {
pub fn sequential_writer(&self, size: u32, type_tag: u32) -> LoResult<SequentialWriter> {
let offset = self.heap_manager.allocate(size, type_tag)?;
if offset == 0 {
return Err(LoError::AllocateWasInvalid);
}
let new_mem_slice = self.heap_manager.memory_slice(DEFAULT_MEMORY_INDEX)?;
self.memory.set(new_mem_slice);