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wasm_interp: Add --debug flag

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Brian Carroll 2022-11-25 00:04:18 +00:00
parent 3d756a8fff
commit 9d77c474d9
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4 changed files with 94 additions and 22 deletions
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14
crates/wasm_interp/src/call_stack.rs
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@ -14,6 +14,8 @@ pub struct CallStack<'a> {
return_addrs_and_block_depths: Vec<'a, (u32, u32)>,
/// frame offsets into the `locals`, `is_float`, and `is_64` vectors (one entry per frame)
frame_offsets: Vec<'a, u32>,
/// base size of the value stack before executing (one entry per frame)
value_stack_bases: Vec<'a, u32>,
/// binary data for local variables (one entry per local)
locals_data: Vec<'a, u64>,
/// int/float type info (one entry per local)
@ -37,6 +39,7 @@ impl<'a> CallStack<'a> {
CallStack {
return_addrs_and_block_depths: Vec::with_capacity_in(256, arena),
frame_offsets: Vec::with_capacity_in(256, arena),
value_stack_bases: Vec::with_capacity_in(256, arena),
locals_data: Vec::with_capacity_in(16 * 256, arena),
is_float: BitVec::with_capacity(256),
is_64: BitVec::with_capacity(256),
@ -70,6 +73,8 @@ impl<'a> CallStack<'a> {
self.set_local_help(i, arg);
}
self.value_stack_bases.push(value_stack.len() as u32);
// Parse local variable declarations in the function header. They're grouped by type.
let local_group_count = u32::parse((), code_bytes, pc).unwrap();
for _ in 0..local_group_count {
@ -87,6 +92,7 @@ impl<'a> CallStack<'a> {
/// On returning from a Wasm call, drop its locals and retrieve the return address
pub fn pop_frame(&mut self) -> Option<(u32, u32)> {
let frame_offset = self.frame_offsets.pop()? as usize;
self.value_stack_bases.pop()?;
self.locals_data.truncate(frame_offset);
self.is_64.truncate(frame_offset);
self.is_64.truncate(frame_offset);
@ -142,6 +148,14 @@ impl<'a> CallStack<'a> {
}
}
}
pub fn value_stack_base(&self) -> u32 {
*self.value_stack_bases.last().unwrap_or(&0)
}
pub fn is_empty(&self) -> bool {
self.is_64.is_empty()
}
}
#[cfg(test)]