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wasm_interp: store return type in frame & create SignatureParamsIter

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Brian Carroll 2022-12-17 13:14:13 +00:00
parent d51beb073f
commit b0d2e7a409
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4 changed files with 153 additions and 61 deletions
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18
crates/wasm_interp/src/frame.rs
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@ -10,12 +10,14 @@ pub struct Frame {
pub fn_index: usize,
/// Address in the code section where this frame returns to
pub return_addr: usize,
/// Depth of the "function block" for this frame
pub function_block_depth: usize,
/// Depth of the "function body block" for this frame
pub body_block_index: usize,
/// Offset in the ValueStack where the args & locals begin
pub locals_start: usize,
/// Number of args & locals in the frame
pub locals_count: usize,
/// Expected return type, if any
pub return_type: Option<ValueType>,
}
impl Frame {
@ -23,22 +25,23 @@ impl Frame {
Frame {
fn_index: 0,
return_addr: 0,
function_block_depth: 0,
body_block_index: 0,
locals_start: 0,
locals_count: 0,
return_type: None,
}
}
pub fn enter(
fn_index: usize,
return_addr: usize,
function_block_depth: usize,
arg_type_bytes: &[u8],
body_block_index: usize,
n_args: usize,
return_type: Option<ValueType>,
code_bytes: &[u8],
value_stack: &mut ValueStack<'_>,
pc: &mut usize,
) -> Self {
let n_args = arg_type_bytes.len();
let locals_start = value_stack.depth() - n_args;
// Parse local variable declarations in the function header. They're grouped by type.
@ -60,9 +63,10 @@ impl Frame {
Frame {
fn_index,
return_addr,
function_block_depth,
body_block_index,
locals_start,
locals_count,
return_type,
}
}