diff options
| -rw-r--r-- | cpus.c | 38 | ||||
| -rw-r--r-- | include/sysemu/replay.h | 4 | ||||
| -rw-r--r-- | replay/replay.c | 34 |
3 files changed, 63 insertions, 13 deletions
diff --git a/cpus.c b/cpus.c index d2e9e4fd96..f07cac2781 100644 --- a/cpus.c +++ b/cpus.c @@ -42,6 +42,7 @@ #include "qemu/seqlock.h" #include "qapi-event.h" #include "hw/nmi.h" +#include "sysemu/replay.h" #ifndef _WIN32 #include "qemu/compatfd.h" @@ -1411,6 +1412,28 @@ int vm_stop_force_state(RunState state) } } +static int64_t tcg_get_icount_limit(void) +{ + int64_t deadline; + + if (replay_mode != REPLAY_MODE_PLAY) { + deadline = qemu_clock_deadline_ns_all(QEMU_CLOCK_VIRTUAL); + + /* Maintain prior (possibly buggy) behaviour where if no deadline + * was set (as there is no QEMU_CLOCK_VIRTUAL timer) or it is more than + * INT32_MAX nanoseconds ahead, we still use INT32_MAX + * nanoseconds. + */ + if ((deadline < 0) || (deadline > INT32_MAX)) { + deadline = INT32_MAX; + } + + return qemu_icount_round(deadline); + } else { + return replay_get_instructions(); + } +} + static int tcg_cpu_exec(CPUState *cpu) { int ret; @@ -1423,24 +1446,12 @@ static int tcg_cpu_exec(CPUState *cpu) #endif if (use_icount) { int64_t count; - int64_t deadline; int decr; timers_state.qemu_icount -= (cpu->icount_decr.u16.low + cpu->icount_extra); cpu->icount_decr.u16.low = 0; cpu->icount_extra = 0; - deadline = qemu_clock_deadline_ns_all(QEMU_CLOCK_VIRTUAL); - - /* Maintain prior (possibly buggy) behaviour where if no deadline - * was set (as there is no QEMU_CLOCK_VIRTUAL timer) or it is more than - * INT32_MAX nanoseconds ahead, we still use INT32_MAX - * nanoseconds. - */ - if ((deadline < 0) || (deadline > INT32_MAX)) { - deadline = INT32_MAX; - } - - count = qemu_icount_round(deadline); + count = tcg_get_icount_limit(); timers_state.qemu_icount += count; decr = (count > 0xffff) ? 0xffff : count; count -= decr; @@ -1458,6 +1469,7 @@ static int tcg_cpu_exec(CPUState *cpu) + cpu->icount_extra); cpu->icount_decr.u32 = 0; cpu->icount_extra = 0; + replay_account_executed_instructions(); } return ret; } diff --git a/include/sysemu/replay.h b/include/sysemu/replay.h index a03c7485d4..d19715fde0 100644 --- a/include/sysemu/replay.h +++ b/include/sysemu/replay.h @@ -22,5 +22,9 @@ extern ReplayMode replay_mode; /*! Returns number of executed instructions. */ uint64_t replay_get_current_step(void); +/*! Returns number of instructions to execute in replay mode. */ +int replay_get_instructions(void); +/*! Updates instructions counter in replay mode. */ +void replay_account_executed_instructions(void); #endif diff --git a/replay/replay.c b/replay/replay.c index 62e8abaadf..b2c67501a5 100644 --- a/replay/replay.c +++ b/replay/replay.c @@ -13,6 +13,7 @@ #include "sysemu/replay.h" #include "replay-internal.h" #include "qemu/timer.h" +#include "qemu/main-loop.h" ReplayMode replay_mode = REPLAY_MODE_NONE; @@ -45,3 +46,36 @@ uint64_t replay_get_current_step(void) { return cpu_get_icount_raw(); } + +int replay_get_instructions(void) +{ + int res = 0; + replay_mutex_lock(); + if (replay_next_event_is(EVENT_INSTRUCTION)) { + res = replay_state.instructions_count; + } + replay_mutex_unlock(); + return res; +} + +void replay_account_executed_instructions(void) +{ + if (replay_mode == REPLAY_MODE_PLAY) { + replay_mutex_lock(); + if (replay_state.instructions_count > 0) { + int count = (int)(replay_get_current_step() + - replay_state.current_step); + replay_state.instructions_count -= count; + replay_state.current_step += count; + if (replay_state.instructions_count == 0) { + assert(replay_data_kind == EVENT_INSTRUCTION); + replay_finish_event(); + /* Wake up iothread. This is required because + timers will not expire until clock counters + will be read from the log. */ + qemu_notify_event(); + } + } + replay_mutex_unlock(); + } +} |