linux-user: Clean up when exiting due to a signal

When exiting due to an exit() syscall, qemu-user calls
preexit_cleanup(), but this is currently not the case when exiting due
to a signal. This leads to various buffers not being flushed (e.g.,
for gprof, for gcov, and for the upcoming perf support).

Add the missing call.

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230112152013.125680-2-iii@linux.ibm.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

linux-user/signal.c

@@ -695,7 +695,7 @@ void cpu_loop_exit_sigbus(CPUState *cpu, target_ulong addr,
 
 /* abort execution with signal */
 static G_NORETURN
-void dump_core_and_abort(int target_sig)
+void dump_core_and_abort(CPUArchState *cpu_env, int target_sig)
 {
     CPUState *cpu = thread_cpu;
     CPUArchState *env = cpu->env_ptr;
@@ -724,6 +724,8 @@ void dump_core_and_abort(int target_sig)
             target_sig, strsignal(host_sig), "core dumped" );
     }
 
+    preexit_cleanup(cpu_env, 128 + target_sig);
+
     /* The proper exit code for dying from an uncaught signal is
      * -<signal>.  The kernel doesn't allow exit() or _exit() to pass
      * a negative value.  To get the proper exit code we need to
@@ -1058,12 +1060,12 @@ static void handle_pending_signal(CPUArchState *cpu_env, int sig,
                    sig != TARGET_SIGURG &&
                    sig != TARGET_SIGWINCH &&
                    sig != TARGET_SIGCONT) {
-            dump_core_and_abort(sig);
+            dump_core_and_abort(cpu_env, sig);
         }
     } else if (handler == TARGET_SIG_IGN) {
         /* ignore sig */
     } else if (handler == TARGET_SIG_ERR) {
-        dump_core_and_abort(sig);
+        dump_core_and_abort(cpu_env, sig);
     } else {
         /* compute the blocked signals during the handler execution */
         sigset_t *blocked_set;