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[PULL,v2,60/60] softmmu: fix for "after access" watchpoints

Message ID 20211029043329.1518029-61-richard.henderson@linaro.org
State New
Headers show
Series [PULL,v2,01/60] qemu/int128: Add int128_{not,xor} | expand

Commit Message

Richard Henderson Oct. 29, 2021, 4:33 a.m. UTC 
From: Pavel Dovgalyuk <pavel.dovgalyuk@ispras.ru>

Watchpoints that should fire after the memory access
break an execution of the current block, try to
translate current instruction into the separate block,
which then causes debug interrupt.
But cpu_interrupt can't be called in such block when
icount is enabled, because interrupts muse be allowed
explicitly.
This patch sets CF_LAST_IO flag for retranslated block,
allowing interrupt request for the last instruction.

Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgalyuk@ispras.ru>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <163542169727.2127597.8141772572696627329.stgit@pasha-ThinkPad-X280>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 softmmu/physmem.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/softmmu/physmem.c b/softmmu/physmem.c
index 9765a509d2..b9a8c1d1f4 100644
--- a/softmmu/physmem.c
+++ b/softmmu/physmem.c
@@ -946,7 +946,7 @@  void cpu_check_watchpoint(CPUState *cpu, vaddr addr, vaddr len,
                 cpu_loop_exit(cpu);
             } else {
                 /* Force execution of one insn next time.  */
-                cpu->cflags_next_tb = 1 | curr_cflags(cpu);
+                cpu->cflags_next_tb = 1 | CF_LAST_IO | curr_cflags(cpu);
                 mmap_unlock();
                 cpu_loop_exit_noexc(cpu);
             }