From b41f203fa92421b8b5d87f83c93d9330d4b2c735 Mon Sep 17 00:00:00 2001
From: not-matthias <matthias@codspeed.io>
Date: Fri, 12 Jun 2026 16:54:44 +0200
Subject: [PATCH] fix(valgrind): skip rustup-wrapped proxy in trace-children

Valgrind rewrites argv[0] when tracing Nix's rustup wrapper, breaking
rustup proxy detection. Add *.rustup-wrapped to --trace-children-skip.
---
 src/executor/valgrind/measure.rs | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/src/executor/valgrind/measure.rs b/src/executor/valgrind/measure.rs
index 32196009..1a8e16ff 100644
--- a/src/executor/valgrind/measure.rs
+++ b/src/executor/valgrind/measure.rs
@@ -46,7 +46,8 @@ fn get_valgrind_args(tool: &SimulationTool, config: &ExecutorConfig) -> Vec<Stri
         }
     }
 
-    let children_skip_patterns = ["*esbuild"];
+    // Valgrind changes argv[0] when tracing Nix's rustup wrapper, which breaks rustup proxy detection.
+    let children_skip_patterns = ["*esbuild", "*.rustup-wrapped"];
     args.push(format!(
         "--trace-children-skip={}",
         children_skip_patterns.join(",")
@@ -235,6 +236,18 @@ mod tests {
         (script_status, out_status)
     }
 
+    #[test]
+    fn test_valgrind_skips_rustup_wrapped_proxy() {
+        let config = ExecutorConfig::test();
+        let args = get_valgrind_args(&SimulationTool::Callgrind, &config);
+        let skip_arg = args
+            .iter()
+            .find(|arg| arg.starts_with("--trace-children-skip="))
+            .unwrap();
+
+        assert!(skip_arg.contains("*.rustup-wrapped"));
+    }
+
     #[test]
     fn test_run_wrapper_script() {
         temp_env::with_var("TEST_ENV_VAR", "test_value".into(), || {