[Qemu-devel] [PATCH v7 03/14] replay: exception replay fix

[Pavel Dovgalyuk <pavel.dovgaluk@ispras.ru>]

This patch fixes replaying the exception when TB cache is full.
It breaks cpu loop execution through setting exception_index
to process such queued work as TB flush.

Signed-off-by: Pavel Dovgalyuk <pavel.dovgaluk@ispras.ru>
---
 cpu-exec.c |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/cpu-exec.c b/cpu-exec.c
index fa08c73..79a2167 100644
--- a/cpu-exec.c
+++ b/cpu-exec.c
@@ -451,6 +451,10 @@ static inline bool cpu_handle_exception(CPUState *cpu, int *ret)
 #ifndef CONFIG_USER_ONLY
     } else if (replay_has_exception()
                && cpu->icount_decr.u16.low + cpu->icount_extra == 0) {
+        /* Break the execution loop in case of running out of TB cache.
+           This is needed to make flushing of the TB cache, because
+           real flush is queued to be executed outside the cpu loop. */
+        cpu->exception_index = EXCP_INTERRUPT;
         /* try to cause an exception pending in the log */
         cpu_exec_nocache(cpu, 1, tb_find(cpu, NULL, 0), true);
         *ret = -1;