diff mbox series

[PULL,v2,4/9] accel/tcg: Assert that tb->size != 0 after translation

Message ID 20210520170519.300951-5-cohuck@redhat.com (mailing list archive)
State New, archived
Headers show
Series [PULL,v2,1/9] target/s390x: Fix translation exception on illegal instruction | expand

Commit Message

Cornelia Huck May 20, 2021, 5:05 p.m. UTC 
From: Ilya Leoshkevich <iii@linux.ibm.com>

If arch-specific code generates a translation block of size 0,
tb_gen_code() may generate a spurious exception. Add an assertion in
order to catch such situations early.

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Message-Id: <20210416154939.32404-5-iii@linux.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
---
 accel/tcg/translate-all.c | 1 +
 1 file changed, 1 insertion(+)
diff mbox series

Patch

diff --git a/accel/tcg/translate-all.c b/accel/tcg/translate-all.c
index fbf8fc630b27..640ff6e3e706 100644
--- a/accel/tcg/translate-all.c
+++ b/accel/tcg/translate-all.c
@@ -1912,6 +1912,7 @@  TranslationBlock *tb_gen_code(CPUState *cpu,
 
     tcg_ctx->cpu = env_cpu(env);
     gen_intermediate_code(cpu, tb, max_insns);
+    assert(tb->size != 0);
     tcg_ctx->cpu = NULL;
     max_insns = tb->icount;