Linux Sandbox: add RawSandboxDie()

sandbox/linux/seccomp-bpf/trap.h

Index: sandbox/linux/seccomp-bpf/trap.h
diff --git a/sandbox/linux/seccomp-bpf/trap.h b/sandbox/linux/seccomp-bpf/trap.h
index db29757c0dbeb5c357006d1afdfd35a7e9ef8cad..2a4c6ed713745f1e538f4dae82975db08c88eb40 100644
--- a/sandbox/linux/seccomp-bpf/trap.h
+++ b/sandbox/linux/seccomp-bpf/trap.h
@@ -90,7 +90,10 @@ class Trap {
   static Trap *GetInstance();
   static void SigSysAction(int nr, siginfo_t *info, void *void_context);
 
-  void SigSys(int nr, siginfo_t *info, void *void_context);
+  // Make sure that SigSys is not inlined in order to get slightly better crash
+  // dumps.
+  void SigSys(int nr, siginfo_t *info, void *void_context)
+      __attribute__ ((noinline));
   ErrorCode MakeTrapImpl(TrapFnc fnc, const void *aux, bool safe);
   bool SandboxDebuggingAllowedByUser() const;