From 135a972b45203ba992afc99ef4f061be8a5acae0 Mon Sep 17 00:00:00 2001
From: Christian Borntraeger <borntraeger@de.ibm.com>
Date: Thu, 25 Aug 2016 20:11:26 +0200
Subject: [PATCH] translate: early exit in tb_flush if there is no tcg
tb_flush does all kind of things, which are very tcg specific. As it
is called from some places even for KVM (e.g. gdb server) it is better
to detect these cases and do an early exit.
This also fixes a crash in the gdb server that was triggered by
commit 909eaac9bbc2 ("tb hash: track translated blocks with qht").
Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Reported-by: Richard Henderson <rth@twiddle.net>
Reported-by: Brent Baccala <cosine@freesoft.org>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Message-id: 1472148686-39841-1-git-send-email-borntraeger@de.ibm.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
translate-all.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/translate-all.c b/translate-all.c
index efeba298b9..0dd6466e07 100644
--- a/translate-all.c
+++ b/translate-all.c
@@ -834,6 +834,9 @@ static void page_flush_tb(void)
/* XXX: tb_flush is currently not thread safe */
void tb_flush(CPUState *cpu)
{
+ if (!tcg_enabled()) {
+ return;
+ }
#if defined(DEBUG_FLUSH)
printf("qemu: flush code_size=%ld nb_tbs=%d avg_tb_size=%ld\n",
(unsigned long)(tcg_ctx.code_gen_ptr - tcg_ctx.code_gen_buffer),
--
2.30.2