From 0b37b3f2a9b3cd59f609b41f7c72f1a4d7dce39c Mon Sep 17 00:00:00 2001
From: Vincent Ambo <mail@tazj.in>
Date: Tue, 23 Aug 2022 22:57:11 +0300
Subject: feat(tvix/eval): add call frame struct to VM

This is going to carry the data for a function invocation inside of
the VM.

Change-Id: I86664563a7e35697a64294acd37ffde037fbd32d
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6241
Tested-by: BuildkiteCI
Reviewed-by: grfn <grfn@gws.fyi>
---
 tvix/eval/src/vm.rs | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'tvix/eval/src')

diff --git a/tvix/eval/src/vm.rs b/tvix/eval/src/vm.rs
index c9b09be82b1c..99e2ba91327c 100644
--- a/tvix/eval/src/vm.rs
+++ b/tvix/eval/src/vm.rs
@@ -13,7 +13,14 @@ use crate::{
 #[cfg(feature = "disassembler")]
 use crate::disassembler::Tracer;
 
+struct CallFrame {
+    lambda: Lambda,
+    ip: usize,
+    stack_offset: usize,
+}
+
 pub struct VM {
+    frames: Vec<CallFrame>,
     ip: usize,
     chunk: Chunk,
     stack: Vec<Value>,
@@ -367,6 +374,7 @@ impl VM {
 
 pub fn run_lambda(lambda: Lambda) -> EvalResult<Value> {
     let mut vm = VM {
+        frames: vec![],
         chunk: Rc::<Chunk>::try_unwrap(lambda.chunk).unwrap(),
         ip: 0,
         stack: vec![],
-- 
cgit 1.4.1