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[Qemu-devel] [PATCH] mttcg: Set jmp_env to handle exit from tb_gen_code
From: |
Pranith Kumar |
Subject: |
[Qemu-devel] [PATCH] mttcg: Set jmp_env to handle exit from tb_gen_code |
Date: |
Mon, 20 Feb 2017 09:53:35 -0500 |
tb_gen_code() can exit execution using cpu_exit_loop() when it cannot
allocate new tb's. To handle this, we need to properly set the jmp_env
pointer ahead of calling tb_gen_code().
CC:Alex Bennée <address@hidden>
CC: Richard Henderson <address@hidden>
Signed-off-by: Pranith Kumar <address@hidden>
---
cpu-exec.c | 23 +++++++++++------------
1 file changed, 11 insertions(+), 12 deletions(-)
diff --git a/cpu-exec.c b/cpu-exec.c
index 97d79612d9..4b70988b24 100644
--- a/cpu-exec.c
+++ b/cpu-exec.c
@@ -236,23 +236,22 @@ static void cpu_exec_step(CPUState *cpu)
cpu_get_tb_cpu_state(env, &pc, &cs_base, &flags);
tb_lock();
- tb = tb_gen_code(cpu, pc, cs_base, flags,
- 1 | CF_NOCACHE | CF_IGNORE_ICOUNT);
- tb->orig_tb = NULL;
- tb_unlock();
-
- cc->cpu_exec_enter(cpu);
-
if (sigsetjmp(cpu->jmp_env, 0) == 0) {
+ tb = tb_gen_code(cpu, pc, cs_base, flags,
+ 1 | CF_NOCACHE | CF_IGNORE_ICOUNT);
+ tb->orig_tb = NULL;
+ tb_unlock();
+
+ cc->cpu_exec_enter(cpu);
/* execute the generated code */
trace_exec_tb_nocache(tb, pc);
cpu_tb_exec(cpu, tb);
- }
+ cc->cpu_exec_exit(cpu);
- cc->cpu_exec_exit(cpu);
- tb_lock();
- tb_phys_invalidate(tb, -1);
- tb_free(tb);
+ tb_lock();
+ tb_phys_invalidate(tb, -1);
+ tb_free(tb);
+ }
tb_unlock();
}
--
2.11.0
- [Qemu-devel] [PATCH] mttcg: Set jmp_env to handle exit from tb_gen_code,
Pranith Kumar <=