feat: pass java options benchmark

Author: not-matthias

src/executor/helpers/env.rs

@@ -29,6 +29,19 @@ pub fn get_base_injected_env(
                 "0".into()
             },
         ),
+        // Java: Enable frame pointers and perf map generation for flamegraph profiling.
+        // - UnlockDiagnosticVMOptions must come before DumpPerfMapAtExit (diagnostic option).
+        // - PreserveFramePointer: Preserves frame pointers for profiling.
+        // - DumpPerfMapAtExit: Writes /tmp/perf-<pid>.map on JVM exit for symbol resolution.
+        // - DebugNonSafepoints: Enables debug info for JIT-compiled non-safepoint code.
+        (
+            "JAVA_TOOL_OPTIONS",
+            if mode == RunnerMode::Walltime {
+                "-XX:+PreserveFramePointer -XX:+UnlockDiagnosticVMOptions -XX:+DumpPerfMapAtExit -XX:+DebugNonSafepoints".into()
+            } else {
+                "".into()
+            },
+        ),
         ("ARCH", ARCH.into()),
         ("CODSPEED_ENV", "runner".into()),
         (