Sanitize auto-function-split names

Fixes #16

Cargo.lock

@@ -329,6 +329,7 @@ dependencies = [
  "rayon",
  "regex",
  "rustc-hash",
+ "sanitise-file-name",
  "serde",
  "serde_json",
  "serde_repr",
@@ -921,6 +922,12 @@ dependencies = [
  "winapi-util",
 ]
 
+[[package]]
+name = "sanitise-file-name"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "19d36299972b96b8ae7e8f04ecbf75fb41a27bf3781af00abcf57609774cb911"
+
 [[package]]
 name = "scopeguard"
 version = "1.2.0"

Cargo.toml

@@ -56,6 +56,7 @@ ppc750cl = { git = "https://github.com/encounter/ppc750cl", rev = "4a2bbbc6f84dc
 rayon = "1.8.0"
 regex = "1.10.2"
 rustc-hash = "1.1.0"
+sanitise-file-name = "1.0.0"
 serde = "1.0.192"
 serde_json = "1.0.108"
 serde_repr = "0.1.17"

src/util/split.rs

@@ -6,6 +6,7 @@ use std::{
 use anyhow::{anyhow, bail, ensure, Context, Result};
 use itertools::Itertools;
 use petgraph::{graph::NodeIndex, Graph};
+use sanitise_file_name::sanitize_with_options;
 use tracing_attributes::instrument;
 
 use crate::{
@@ -69,7 +70,12 @@ fn split_ctors_dtors(obj: &mut ObjInfo, start: SectionAddress, end: SectionAddre
                     .section
                     .and_then(|idx| obj.sections.get(idx).map(|s| s.name.clone()))
                     .unwrap_or_else(|| "unknown".to_string());
-                format!("auto_{}_{}", function_symbol.name, section_name.trim_start_matches('.'))
+                let name =
+                    sanitize_with_options(&function_symbol.name, &sanitise_file_name::Options {
+                        length_limit: 20,
+                        ..Default::default()
+                    });
+                format!("auto_{}_{}", name, section_name.trim_start_matches('.'))
             });
             log::debug!("Adding splits to unit {}", unit);