cpu: fix memleak of 'halt_cond' and 'thread'

Since a4c2735f35 (cpu: move Qemu[Thread|Cond] setup into common code,
2024-05-30) these fields are now allocated at cpu_common_initfn(). So
let's make sure we also free them at cpu_common_finalize().

Furthermore, the code also frees these on round robin, but we missed
'halt_cond'.

Signed-off-by: Matheus Tavares Bernardino <quic_mathbern@quicinc.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Reviewed-by: Michael Tokarev <mjt@tls.msk.ru>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

accel/tcg/tcg-accel-ops-rr.c

@@ -329,6 +329,7 @@ void rr_start_vcpu_thread(CPUState *cpu)
         /* we share the thread, dump spare data */
         g_free(cpu->thread);
         qemu_cond_destroy(cpu->halt_cond);
+        g_free(cpu->halt_cond);
         cpu->thread = single_tcg_cpu_thread;
         cpu->halt_cond = single_tcg_halt_cond;
 

hw/core/cpu-common.c

@@ -286,6 +286,9 @@ static void cpu_common_finalize(Object *obj)
     g_array_free(cpu->gdb_regs, TRUE);
     qemu_lockcnt_destroy(&cpu->in_ioctl_lock);
     qemu_mutex_destroy(&cpu->work_mutex);
+    qemu_cond_destroy(cpu->halt_cond);
+    g_free(cpu->halt_cond);
+    g_free(cpu->thread);
 }
 
 static int64_t cpu_common_get_arch_id(CPUState *cpu)