diff --git a/cpu-exec.c b/cpu-exec.c
index a1e3d58692..a57b388623 100644
--- a/cpu-exec.c
+++ b/cpu-exec.c
@@ -30,6 +30,7 @@
#if defined(TARGET_I386) && !defined(CONFIG_USER_ONLY)
#include "hw/i386/apic.h"
#endif
+#include "sysemu/replay.h"
/* -icount align implementation. */
@@ -346,21 +347,25 @@ int cpu_exec(CPUState *cpu)
uintptr_t next_tb;
SyncClocks sc;
+ /* replay_interrupt may need current_cpu */
+ current_cpu = cpu;
+
if (cpu->halted) {
#if defined(TARGET_I386) && !defined(CONFIG_USER_ONLY)
- if (cpu->interrupt_request & CPU_INTERRUPT_POLL) {
+ if ((cpu->interrupt_request & CPU_INTERRUPT_POLL)
+ && replay_interrupt()) {
apic_poll_irq(x86_cpu->apic_state);
cpu_reset_interrupt(cpu, CPU_INTERRUPT_POLL);
}
#endif
if (!cpu_has_work(cpu)) {
+ current_cpu = NULL;
return EXCP_HALTED;
}
cpu->halted = 0;
}
- current_cpu = cpu;
atomic_mb_set(&tcg_current_cpu, cpu);
rcu_read_lock();
@@ -402,10 +407,22 @@ int cpu_exec(CPUState *cpu)
cpu->exception_index = -1;
break;
#else
- cc->do_interrupt(cpu);
- cpu->exception_index = -1;
+ if (replay_exception()) {
+ cc->do_interrupt(cpu);
+ cpu->exception_index = -1;
+ } else if (!replay_has_interrupt()) {
+ /* give a chance to iothread in replay mode */
+ ret = EXCP_INTERRUPT;
+ break;
+ }
#endif
}
+ } else if (replay_has_exception()
+ && cpu->icount_decr.u16.low + cpu->icount_extra == 0) {
+ /* try to cause an exception pending in the log */
+ cpu_exec_nocache(cpu, 1, tb_find_fast(cpu), true);
+ ret = -1;
+ break;
}
next_tb = 0; /* force lookup of first TB */
@@ -421,30 +438,40 @@ int cpu_exec(CPUState *cpu)
cpu->exception_index = EXCP_DEBUG;
cpu_loop_exit(cpu);
}
- if (interrupt_request & CPU_INTERRUPT_HALT) {
+ if (replay_mode == REPLAY_MODE_PLAY
+ && !replay_has_interrupt()) {
+ /* Do nothing */
+ } else if (interrupt_request & CPU_INTERRUPT_HALT) {
+ replay_interrupt();
cpu->interrupt_request &= ~CPU_INTERRUPT_HALT;
cpu->halted = 1;
cpu->exception_index = EXCP_HLT;
cpu_loop_exit(cpu);
}
#if defined(TARGET_I386)
- if (interrupt_request & CPU_INTERRUPT_INIT) {
+ else if (interrupt_request & CPU_INTERRUPT_INIT) {
+ replay_interrupt();
cpu_svm_check_intercept_param(env, SVM_EXIT_INIT, 0);
do_cpu_init(x86_cpu);
cpu->exception_index = EXCP_HALTED;
cpu_loop_exit(cpu);
}
#else
- if (interrupt_request & CPU_INTERRUPT_RESET) {
+ else if (interrupt_request & CPU_INTERRUPT_RESET) {
+ replay_interrupt();
cpu_reset(cpu);
+ cpu_loop_exit(cpu);
}
#endif
/* The target hook has 3 exit conditions:
False when the interrupt isn't processed,
True when it is, and we should restart on a new TB,
and via longjmp via cpu_loop_exit. */
- if (cc->cpu_exec_interrupt(cpu, interrupt_request)) {
- next_tb = 0;
+ else {
+ replay_interrupt();
+ if (cc->cpu_exec_interrupt(cpu, interrupt_request)) {
+ next_tb = 0;
+ }
}
/* Don't use the cached interrupt_request value,
do_interrupt may have updated the EXITTB flag. */
@@ -455,7 +482,8 @@ int cpu_exec(CPUState *cpu)
next_tb = 0;
}
}
- if (unlikely(cpu->exit_request)) {
+ if (unlikely(cpu->exit_request
+ || replay_has_interrupt())) {
cpu->exit_request = 0;
cpu->exception_index = EXCP_INTERRUPT;
cpu_loop_exit(cpu);
diff --git a/include/sysemu/replay.h b/include/sysemu/replay.h
index d19715fde0..8915523eaf 100644
--- a/include/sysemu/replay.h
+++ b/include/sysemu/replay.h
@@ -27,4 +27,21 @@ int replay_get_instructions(void);
/*! Updates instructions counter in replay mode. */
void replay_account_executed_instructions(void);
+/* Interrupts and exceptions */
+
+/*! Called by exception handler to write or read
+ exception processing events. */
+bool replay_exception(void);
+/*! Used to determine that exception is pending.
+ Does not proceed to the next event in the log. */
+bool replay_has_exception(void);
+/*! Called by interrupt handlers to write or read
+ interrupt processing events.
+ \return true if interrupt should be processed */
+bool replay_interrupt(void);
+/*! Tries to read interrupt event from the file.
+ Returns true, when interrupt request is pending */
+bool replay_has_interrupt(void);
+
+
#endif
diff --git a/replay/replay-internal.h b/replay/replay-internal.h
index ff4fabc326..5ff1c14287 100644
--- a/replay/replay-internal.h
+++ b/replay/replay-internal.h
@@ -17,6 +17,10 @@
enum ReplayEvents {
/* for instruction event */
EVENT_INSTRUCTION,
+ /* for software interrupt */
+ EVENT_INTERRUPT,
+ /* for emulated exceptions */
+ EVENT_EXCEPTION,
EVENT_COUNT
};
diff --git a/replay/replay.c b/replay/replay.c
index b2c67501a5..b4fc64acee 100644
--- a/replay/replay.c
+++ b/replay/replay.c
@@ -79,3 +79,70 @@ void replay_account_executed_instructions(void)
replay_mutex_unlock();
}
}
+
+bool replay_exception(void)
+{
+ if (replay_mode == REPLAY_MODE_RECORD) {
+ replay_save_instructions();
+ replay_mutex_lock();
+ replay_put_event(EVENT_EXCEPTION);
+ replay_mutex_unlock();
+ return true;
+ } else if (replay_mode == REPLAY_MODE_PLAY) {
+ bool res = replay_has_exception();
+ if (res) {
+ replay_mutex_lock();
+ replay_finish_event();
+ replay_mutex_unlock();
+ }
+ return res;
+ }
+
+ return true;
+}
+
+bool replay_has_exception(void)
+{
+ bool res = false;
+ if (replay_mode == REPLAY_MODE_PLAY) {
+ replay_account_executed_instructions();
+ replay_mutex_lock();
+ res = replay_next_event_is(EVENT_EXCEPTION);
+ replay_mutex_unlock();
+ }
+
+ return res;
+}
+
+bool replay_interrupt(void)
+{
+ if (replay_mode == REPLAY_MODE_RECORD) {
+ replay_save_instructions();
+ replay_mutex_lock();
+ replay_put_event(EVENT_INTERRUPT);
+ replay_mutex_unlock();
+ return true;
+ } else if (replay_mode == REPLAY_MODE_PLAY) {
+ bool res = replay_has_interrupt();
+ if (res) {
+ replay_mutex_lock();
+ replay_finish_event();
+ replay_mutex_unlock();
+ }
+ return res;
+ }
+
+ return true;
+}
+
+bool replay_has_interrupt(void)
+{
+ bool res = false;
+ if (replay_mode == REPLAY_MODE_PLAY) {
+ replay_account_executed_instructions();
+ replay_mutex_lock();
+ res = replay_next_event_is(EVENT_INTERRUPT);
+ replay_mutex_unlock();
+ }
+ return res;
+}
diff --git a/stubs/replay-user.c b/stubs/replay-user.c
index 0c90bfc0e4..cf330721c8 100644
--- a/stubs/replay-user.c
+++ b/stubs/replay-user.c
@@ -10,3 +10,23 @@
*/
#include "sysemu/replay.h"
+
+bool replay_exception(void)
+{
+ return true;
+}
+
+bool replay_has_exception(void)
+{
+ return false;
+}
+
+bool replay_interrupt(void)
+{
+ return true;
+}
+
+bool replay_has_interrupt(void)
+{
+ return false;
+}