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Add support for debugging core nondeterminism

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This adds a debug flag to netplay_net (DEBUG_NONDETERMINISTIC_CORES)
which helps determine if a core has nondeterminism.
This commit is contained in:
Gregor Richards 2016-10-05 07:58:01 -04:00
parent 60153e7035
commit e65a63e5d5
1 changed files with 21 additions and 1 deletions
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22
network/netplay/netplay_net.c
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@ -27,7 +27,9 @@
#include "../../autosave.h"
#define TOO_EARLY_TO_SAVE 60
#if 0
#define DEBUG_NONDETERMINISTIC_CORES
#endif
static void netplay_handle_frame_hash(netplay_t *netplay, struct delta_frame *delta)
{
@ -195,6 +197,7 @@ static void netplay_net_post_frame(netplay_t *netplay)
return;
}
#ifndef DEBUG_NONDETERMINISTIC_CORES
if (!netplay->force_rewind)
{
/* Skip ahead if we predicted correctly.
@ -213,6 +216,7 @@ static void netplay_net_post_frame(netplay_t *netplay)
netplay->other_frame_count++;
}
}
#endif
/* Now replay the real input if we've gotten ahead of it */
if (netplay->force_rewind ||
@ -257,6 +261,22 @@ static void netplay_net_post_frame(netplay_t *netplay)
autosave_unlock();
netplay->replay_ptr = NEXT_PTR(netplay->replay_ptr);
netplay->replay_frame_count++;
#ifdef DEBUG_NONDETERMINISTIC_CORES
if (ptr->have_remote && netplay_delta_frame_ready(netplay, &netplay->buffer[netplay->replay_ptr], netplay->replay_frame_count))
{
RARCH_LOG("PRE %u: %X\n", netplay->replay_frame_count-1, netplay_delta_frame_crc(netplay, ptr));
if (netplay->is_server)
RARCH_LOG("INP %X %X\n", ptr->real_input_state[0], ptr->self_state[0]);
else
RARCH_LOG("INP %X %X\n", ptr->self_state[0], ptr->real_input_state[0]);
ptr = &netplay->buffer[netplay->replay_ptr];
serial_info.data = ptr->state;
memset(serial_info.data, 0, serial_info.size);
core_serialize(&serial_info);
RARCH_LOG("POST %u: %X\n", netplay->replay_frame_count-1, netplay_delta_frame_crc(netplay, ptr));
}
#endif
}
if (netplay->read_frame_count < netplay->self_frame_count)