libafl_qemu: Continue build with outdated LLVM, ignore TUI race conditions (#2461)

* libafl_qemu: Continue build with outdated LLVM

* Ignore race condition

* ignore more race conditions, remove useless clones

* fix fixes

fuzzers/qemu/qemu_launcher/Cargo.toml

@@ -10,6 +10,7 @@ edition = "2021"
 [features]
 default = ["std", "injections"]
 std = []
+clippy = []                     # Only for clippy, don't use.
 
 ## Build with a simple event manager instead of Launcher - don't fork, and crash after the first bug.
 simplemgr = []

fuzzers/qemu/qemu_launcher/injection_test/.gitignore

@@ -0,0 +1,2 @@
+sqltest
+static

libafl/src/monitors/tui/ui.rs

@@ -148,8 +148,7 @@ impl TuiUi {
             .constraints([Constraint::Length(3), Constraint::Min(0)].as_ref())
             .split(left_top_layout[0]);
 
-        let mut status_bar: String = self.title.clone();
-        status_bar = status_bar + " (" + self.version.as_str() + ")";
+        let status_bar: String = format!("{} ({})", self.title, self.version.as_str());
 
         let text = vec![Line::from(Span::styled(
             &status_bar,
@@ -425,18 +424,22 @@ impl TuiUi {
         area: Rect,
         is_overall: bool,
     ) {
-        let item_geometry: ItemGeometry = if is_overall {
-            app.read().unwrap().total_item_geometry.clone()
+        let tui_context = app.read().unwrap();
+        let empty_geometry: ItemGeometry = ItemGeometry::new();
+        let item_geometry: &ItemGeometry = if is_overall {
+            &tui_context.total_item_geometry
         } else if self.clients < 2 {
-            ItemGeometry::new()
+            &empty_geometry
         } else {
-            app.read()
-                .unwrap()
-                .clients
-                .get(&self.clients_idx)
-                .unwrap()
-                .item_geometry
-                .clone()
+            let clients = &tui_context.clients;
+            let client = clients.get(&self.clients_idx);
+            let client = client.as_ref();
+            if let Some(client) = client {
+                &client.item_geometry
+            } else {
+                log::warn!("Client {} was `None`. Race condition?", &self.clients_idx);
+                &empty_geometry
+            }
         };
 
         let items = vec![
@@ -458,7 +461,7 @@ impl TuiUi {
             ]),
             Row::new(vec![
                 Cell::from(Span::raw("stability")),
-                Cell::from(Span::raw(item_geometry.stability)),
+                Cell::from(Span::raw(&item_geometry.stability)),
             ]),
         ];
 
@@ -495,26 +498,25 @@ impl TuiUi {
         area: Rect,
         is_overall: bool,
     ) {
-        let tup: (Duration, ProcessTiming) = if is_overall {
-            let tui_context = app.read().unwrap();
-            (
-                tui_context.start_time,
-                tui_context.total_process_timing.clone(),
-            )
+        let tui_context = app.read().unwrap();
+        let empty_timing: ProcessTiming = ProcessTiming::new();
+        let tup: (Duration, &ProcessTiming) = if is_overall {
+            (tui_context.start_time, &tui_context.total_process_timing)
         } else if self.clients < 2 {
-            (current_time(), ProcessTiming::new())
+            (current_time(), &empty_timing)
         } else {
-            let client = app
-                .read()
-                .unwrap()
-                .clients
-                .get(&self.clients_idx)
-                .unwrap()
-                .clone();
-            (
-                client.process_timing.client_start_time,
-                client.process_timing,
-            )
+            let clients = &tui_context.clients;
+            let client = clients.get(&self.clients_idx);
+            let client = client.as_ref();
+            if let Some(client) = client {
+                (
+                    client.process_timing.client_start_time,
+                    &client.process_timing,
+                )
+            } else {
+                log::warn!("Client {} was `None`. Race condition?", &self.clients_idx);
+                (current_time(), &empty_timing)
+            }
         };
         let items = vec![
             Row::new(vec![
@@ -523,7 +525,7 @@ impl TuiUi {
             ]),
             Row::new(vec![
                 Cell::from(Span::raw("exec speed")),
-                Cell::from(Span::raw(tup.1.exec_speed)),
+                Cell::from(Span::raw(&tup.1.exec_speed)),
             ]),
             Row::new(vec![
                 Cell::from(Span::raw("last new entry")),

libafl_qemu/libafl_qemu_build/src/lib.rs

@@ -108,11 +108,10 @@ fn find_llvm_config() -> Result<String, String> {
 
     if which("llvm-config").is_ok() {
         if let Some(ver) = find_llvm_version("llvm-config".to_owned()) {
-            if ver >= rustc_llvm_ver {
-                return Ok("llvm-config".to_owned());
+            if ver < rustc_llvm_ver {
+                println!("cargo:warning=Version of llvm-config is {ver} but needs to be at least rustc's version ({rustc_llvm_ver})! We will (try to) continue to build. Continue at your own risk, or rebuild with a set LLVM_CONFIG_PATH env variable, pointing to a newer version.");
             }
-
-            return Err(format!("Version of llvm-config is {ver} but needs to be at least rustc's version({rustc_llvm_ver})"));
+            return Ok("llvm-config".to_owned());
         }
     }