diff --git a/tests/benchmarks/resolution/tracer/go-tracer.sh b/tests/benchmarks/resolution/tracer/go-tracer.sh
index a662fb32..459990a2 100644
--- a/tests/benchmarks/resolution/tracer/go-tracer.sh
+++ b/tests/benchmarks/resolution/tracer/go-tracer.sh
@@ -25,6 +25,8 @@ fi
 TMP_DIR="$(mktemp -d)"
 trap 'rm -rf "$TMP_DIR"' EXIT
 
+source "$(dirname "${BASH_SOURCE[0]}")/tracer-common.sh"
+
 cp "$FIXTURE_DIR"/*.go "$TMP_DIR/"
 
 # Create go.mod
@@ -135,28 +137,15 @@ for gofile in "$TMP_DIR"/*.go; do
 
     # Use sed to inject traceCall() after function opening braces
     # Match: func ... { at end of line -> add traceCall() on next line
-    # Use portable sed -i: GNU sed uses -i alone, BSD sed (macOS) requires -i ''
-    if sed --version 2>/dev/null | grep -q GNU; then
-        sed -i -E 's/^(func [^{]*\{)\s*$/\1\n\ttraceCall()/' "$gofile"
-    else
-        sed -i '' -E 's/^(func [^{]*\{)\s*$/\1\n\ttraceCall()/' "$gofile"
-    fi
+    sedi -E 's/^(func [^{]*\{)\s*$/\1\n\ttraceCall()/' "$gofile"
 done
 
 # Inject defer dumpTrace() at start of main()
-if sed --version 2>/dev/null | grep -q GNU; then
-    sed -i -E '/^func main\(\)\s*\{/{
-        a\	defer dumpTrace()
-    }' "$TMP_DIR/main.go"
-    # Suppress any os.Exit calls that would skip deferred dumpTrace
-    sed -i 's/os\.Exit(/\/\/ os.Exit(/g' "$TMP_DIR/main.go"
-else
-    sed -i '' -E '/^func main\(\)\s*\{/{
-        a\	defer dumpTrace()
-    }' "$TMP_DIR/main.go"
-    # Suppress any os.Exit calls that would skip deferred dumpTrace
-    sed -i '' 's/os\.Exit(/\/\/ os.Exit(/g' "$TMP_DIR/main.go"
-fi
+sedi -E '/^func main\(\)\s*\{/{
+    a\	defer dumpTrace()
+}' "$TMP_DIR/main.go"
+# Suppress any os.Exit calls that would skip deferred dumpTrace
+sedi 's/os\.Exit(/\/\/ os.Exit(/g' "$TMP_DIR/main.go"
 
 # Redirect fmt.Print* to stderr so only JSON goes to stdout
 cat >> "$TMP_DIR/trace_support.go" <<'REDIRECT'
diff --git a/tests/benchmarks/resolution/tracer/jvm-tracer.sh b/tests/benchmarks/resolution/tracer/jvm-tracer.sh
index eed1c7ad..563a5e75 100644
--- a/tests/benchmarks/resolution/tracer/jvm-tracer.sh
+++ b/tests/benchmarks/resolution/tracer/jvm-tracer.sh
@@ -49,14 +49,7 @@ esac
 TMP_DIR="$(mktemp -d)"
 trap 'rm -rf "$TMP_DIR"' EXIT
 
-# Portable sed -i (GNU vs BSD)
-sedi() {
-    if sed --version 2>/dev/null | grep -q GNU; then
-        sed -i "$@"
-    else
-        sed -i '' "$@"
-    fi
-}
+source "$(dirname "${BASH_SOURCE[0]}")/tracer-common.sh"
 
 # Copy fixture files
 case "$LANG" in
@@ -147,34 +140,19 @@ case "$LANG" in
             [[ "$base" == "CallTracer.java" ]] && continue
             # Add CallTracer.traceCall() after method opening braces
             # Match lines like: public void method(...) {
-            # Use portable sed -i: GNU sed uses -i alone, BSD sed (macOS) requires -i ''
             # The first sed pass matches all method/constructor opening braces,
             # so a second pass is unnecessary (it would double-inject traceCall).
-            if sed --version 2>/dev/null | grep -q GNU; then
-                sed -i -E '/\)\s*\{$/{
-                    /class |interface /!{
-                        a\        CallTracer.traceCall();
-                    }
-                }' "$javafile"
-            else
-                sed -i '' -E '/\)\s*\{$/{
-                    /class |interface /!{
-                        a\        CallTracer.traceCall();
-                    }
-                }' "$javafile"
-            fi
+            sedi -E '/\)\s*\{$/{
+                /class |interface /!{
+                    a\        CallTracer.traceCall();
+                }
+            }' "$javafile"
         done
 
         # Add dump call at end of main
-        if sed --version 2>/dev/null | grep -q GNU; then
-            sed -i '/public static void main/,/\}/ {
-                /^\s*\}/ i\        CallTracer.dump();
-            }' "$TMP_DIR/Main.java" 2>/dev/null || true
-        else
-            sed -i '' '/public static void main/,/\}/ {
-                /^\s*\}/ i\        CallTracer.dump();
-            }' "$TMP_DIR/Main.java" 2>/dev/null || true
-        fi
+        sedi '/public static void main/,/\}/ {
+            /^\s*\}/ i\        CallTracer.dump();
+        }' "$TMP_DIR/Main.java" 2>/dev/null || true
 
         # Compile and run
         cd "$TMP_DIR"
diff --git a/tests/benchmarks/resolution/tracer/native-tracer.sh b/tests/benchmarks/resolution/tracer/native-tracer.sh
index e83d3276..1546d31d 100644
--- a/tests/benchmarks/resolution/tracer/native-tracer.sh
+++ b/tests/benchmarks/resolution/tracer/native-tracer.sh
@@ -29,14 +29,7 @@ FIXTURE_DIR="$(cd "$FIXTURE_DIR" && pwd)"
 TMP_DIR="$(mktemp -d)"
 trap 'rm -rf "$TMP_DIR"' EXIT
 
-# Portable sed -i (GNU vs BSD)
-sedi() {
-    if sed --version 2>/dev/null | grep -q GNU; then
-        sed -i "$@"
-    else
-        sed -i '' "$@"
-    fi
-}
+source "$(dirname "${BASH_SOURCE[0]}")/tracer-common.sh"
 
 empty_result() {
     local reason="${1:-toolchain not available}"
diff --git a/tests/benchmarks/resolution/tracer/tracer-common.sh b/tests/benchmarks/resolution/tracer/tracer-common.sh
new file mode 100644
index 00000000..d34dc620
--- /dev/null
+++ b/tests/benchmarks/resolution/tracer/tracer-common.sh
@@ -0,0 +1,18 @@
+# shellcheck shell=bash
+# Shared helpers for the dynamic call tracer scripts in this directory.
+# Each tracer (native-tracer.sh, jvm-tracer.sh, go-tracer.sh, ...) is spawned
+# as its own subprocess by run-tracer.mjs, so sharing logic between them means
+# sourcing this file rather than importing a function — source it with a path
+# relative to the caller's own location so it resolves regardless of the
+# invoking process's working directory:
+#
+#   source "$(dirname "${BASH_SOURCE[0]}")/tracer-common.sh"
+
+# Portable sed -i (GNU vs BSD)
+sedi() {
+    if sed --version 2>/dev/null | grep -q GNU; then
+        sed -i "$@"
+    else
+        sed -i '' "$@"
+    fi
+}