diff mbox series

[v11,25/25] icount: clean up cpu_can_io before jumping to the next block

Message ID 20190131131744.23264.80091.stgit@pasha-VirtualBox (mailing list archive)
State New, archived
Headers show
Series Fixing record/replay and adding reverse debugging | expand

Commit Message

Pavel Dovgalyuk Jan. 31, 2019, 1:17 p.m. UTC 
Most of IO instructions can be executed only at the end of the block in
icount mode. Therefore translator can set cpu_can_io flag when translating
the last instruction.
But when the blocks are chained, then this flag is not reset and may
remain set at the beginning of the next block.
This patch resets the flag before "chaining" the translation blocks.

Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru>
---
 accel/tcg/tcg-runtime.c |    2 ++
 1 file changed, 2 insertions(+)
diff mbox series

Patch

diff --git a/accel/tcg/tcg-runtime.c b/accel/tcg/tcg-runtime.c
index d0d4484..5871f5a 100644
--- a/accel/tcg/tcg-runtime.c
+++ b/accel/tcg/tcg-runtime.c
@@ -151,6 +151,8 @@  void *HELPER(lookup_tb_ptr)(CPUArchState *env)
     target_ulong cs_base, pc;
     uint32_t flags;
 
+    /* We are going to jump to the next block. can_do_io should be reset */
+    cpu->can_do_io = !use_icount;
     tb = tb_lookup__cpu_state(cpu, &pc, &cs_base, &flags, curr_cflags());
     if (tb == NULL) {
         return tcg_ctx->code_gen_epilogue;