Add debug info to compiled VM code

1 files changed, 31 insertions, 0 deletions

diff --git a/pkg/lang/vm/code/debug.go b/pkg/lang/vm/code/debug.go
new file mode 100644
index 0000000..b96c834
--- /dev/null
+++ b/pkg/lang/vm/code/debug.go
@@ -0,0 +1,31 @@
+package code
+
+import "jinx/pkg/libs/rangemap"
+
+type DebugInfo struct {
+	file     string
+	pcToLine rangemap.RangeMap[int]
+}
+
+func NewDebugInfo(file string) DebugInfo {
+	return DebugInfo{
+		file:     file,
+		pcToLine: rangemap.New[int](),
+	}
+}
+
+func (di *DebugInfo) File() string {
+	return di.file
+}
+
+func (di *DebugInfo) PCToLine(pc int) int {
+	line, ok := di.pcToLine.Get(pc)
+	if !ok {
+		return -1
+	}
+	return *line
+}
+
+func (di *DebugInfo) AppendLine(uptoPc, line int) {
+	di.pcToLine.AppendToLast(uptoPc, line)
+}