Line data    Source code

       1             : #include "fd_sysvar_slot_history.h"
       2             : #include "fd_sysvar.h"
       3             : #include "fd_sysvar_rent.h"
       4             : #include "../fd_system_ids.h"
       5             : #include "../fd_txn_account.h"
       6             : #include "../../../funk/fd_funk_txn.h"
       7             : 
       8             : /* FIXME These constants should be header defines */
       9             : 
      10             : /* https://github.com/solana-labs/solana/blob/8f2c8b8388a495d2728909e30460aa40dcc5d733/sdk/program/src/slot_history.rs#L37 */
      11           0 : #define FD_SLOT_HISTORY_MAX_ENTRIES (1024UL * 1024UL)
      12             : 
      13             : /* TODO: move into separate bitvec library */
      14           0 : #define FD_SLOT_HISTORY_BITS_PER_BLOCK (8UL * sizeof(ulong))
      15             : 
      16           0 : #define FD_SLOT_HISTORY_BLOCKS_LEN (FD_SLOT_HISTORY_MAX_ENTRIES / FD_SLOT_HISTORY_BITS_PER_BLOCK)
      17             : 
      18             : void
      19             : fd_sysvar_slot_history_set( fd_slot_history_global_t * history,
      20           0 :                             ulong                      i ) {
      21           0 :   if( FD_UNLIKELY( i > history->next_slot && i - history->next_slot >= FD_SLOT_HISTORY_MAX_ENTRIES ) ) {
      22           0 :     FD_LOG_WARNING(( "Ignoring out of bounds (i=%lu next_slot=%lu)", i, history->next_slot ));
      23           0 :     return;
      24           0 :   }
      25             : 
      26           0 :   ulong * blocks     = (ulong *)((uchar*)history + history->bits_bitvec_offset);
      27           0 :   ulong   blocks_len = history->bits_bitvec_len;
      28             : 
      29             :   // Skipped slots, delete them from history
      30           0 :   if( FD_UNLIKELY( blocks_len == 0 ) ) return;
      31           0 :   for( ulong j = history->next_slot; j < i; j++ ) {
      32           0 :     ulong block_idx = (j / FD_SLOT_HISTORY_BITS_PER_BLOCK) % (blocks_len);
      33           0 :     blocks[ block_idx ] &= ~( 1UL << ( j % FD_SLOT_HISTORY_BITS_PER_BLOCK ) );
      34           0 :   }
      35           0 :   ulong block_idx = (i / FD_SLOT_HISTORY_BITS_PER_BLOCK) % (blocks_len);
      36           0 :   blocks[ block_idx ] |= ( 1UL << ( i % FD_SLOT_HISTORY_BITS_PER_BLOCK ) );
      37           0 : }
      38             : 
      39             : 
      40             : void
      41             : fd_sysvar_slot_history_write_history( fd_bank_t *                bank,
      42             :                                       fd_accdb_user_t *          accdb,
      43             :                                       fd_funk_txn_xid_t const *  xid,
      44             :                                       fd_capture_ctx_t *         capture_ctx,
      45           0 :                                       fd_slot_history_global_t * history ) {
      46           0 :   uchar __attribute__((aligned(FD_SYSVAR_SLOT_HISTORY_ALIGN))) slot_history_mem[ FD_SYSVAR_SLOT_HISTORY_BINCODE_SZ ] = {0};
      47           0 :   fd_bincode_encode_ctx_t ctx = {
      48           0 :     .data    = slot_history_mem,
      49           0 :     .dataend = slot_history_mem + FD_SYSVAR_SLOT_HISTORY_BINCODE_SZ
      50           0 :   };
      51           0 :   int err = fd_slot_history_encode_global( history, &ctx );
      52           0 :   if( FD_UNLIKELY( err!=FD_BINCODE_SUCCESS ) ) FD_LOG_ERR(( "fd_slot_history_encode_global failed" ));
      53           0 :   fd_sysvar_account_update( bank, accdb, xid, capture_ctx, &fd_sysvar_slot_history_id, slot_history_mem, FD_SYSVAR_SLOT_HISTORY_BINCODE_SZ );
      54           0 : }
      55             : 
      56             : /* https://github.com/solana-labs/solana/blob/8f2c8b8388a495d2728909e30460aa40dcc5d733/sdk/program/src/slot_history.rs#L16 */
      57             : 
      58             : void
      59             : fd_sysvar_slot_history_init( fd_bank_t *               bank,
      60             :                              fd_accdb_user_t *         accdb,
      61             :                              fd_funk_txn_xid_t const * xid,
      62           0 :                              fd_capture_ctx_t *        capture_ctx ) {
      63             :   /* Create a new slot history instance */
      64             : 
      65             :   /* We need to construct the gaddr-aware slot history object */
      66           0 :   uchar __attribute__((aligned(FD_SYSVAR_SLOT_HISTORY_ALIGN))) slot_history_mem[ FD_SYSVAR_SLOT_HISTORY_FOOTPRINT ] = {0};
      67           0 :   fd_slot_history_global_t * history = (fd_slot_history_global_t *)slot_history_mem;
      68           0 :   ulong *                    blocks  = (ulong *)fd_ulong_align_up( (ulong)((uchar*)history + sizeof(fd_slot_history_global_t)), alignof(ulong) );
      69             : 
      70           0 :   history->next_slot          = fd_bank_slot_get( bank ) + 1UL;
      71           0 :   history->bits_bitvec_offset = (ulong)((uchar*)blocks - (uchar*)history);
      72           0 :   history->bits_len           = FD_SLOT_HISTORY_MAX_ENTRIES;
      73           0 :   history->bits_bitvec_len    = FD_SLOT_HISTORY_BLOCKS_LEN;
      74           0 :   history->has_bits           = 1;
      75             : 
      76             :   /* TODO: handle slot != 0 init case */
      77           0 :   fd_sysvar_slot_history_set( history, fd_bank_slot_get( bank ) );
      78           0 :   fd_sysvar_slot_history_write_history( bank, accdb, xid, capture_ctx, history );
      79           0 : }
      80             : 
      81             : /* https://github.com/solana-labs/solana/blob/8f2c8b8388a495d2728909e30460aa40dcc5d733/runtime/src/bank.rs#L2345 */
      82             : int
      83             : fd_sysvar_slot_history_update( fd_bank_t *               bank,
      84             :                                fd_accdb_user_t *         accdb,
      85             :                                fd_funk_txn_xid_t const * xid,
      86           0 :                                fd_capture_ctx_t *        capture_ctx ) {
      87             :   /* Set current_slot, and update next_slot */
      88           0 :   fd_pubkey_t const * key = &fd_sysvar_slot_history_id;
      89             : 
      90           0 :   fd_txn_account_t rec[1];
      91           0 :   int err = fd_txn_account_init_from_funk_readonly( rec, key, accdb->funk, xid );
      92           0 :   if( FD_UNLIKELY( err ) ) FD_LOG_CRIT(( "fd_txn_account_init_from_funk_readonly(slot_history) failed: %d", err ));
      93             : 
      94           0 :   fd_bincode_decode_ctx_t ctx = {
      95           0 :     .data    = fd_txn_account_get_data( rec ),
      96           0 :     .dataend = fd_txn_account_get_data( rec ) + fd_txn_account_get_data_len( rec )
      97           0 :   };
      98             : 
      99           0 :   uchar __attribute__((aligned(FD_SYSVAR_SLOT_HISTORY_ALIGN))) slot_history_mem[ FD_SYSVAR_SLOT_HISTORY_FOOTPRINT ] = {0};
     100           0 :   fd_slot_history_global_t * history = fd_slot_history_decode_global( slot_history_mem, &ctx );
     101             : 
     102             :   /* https://github.com/solana-labs/solana/blob/8f2c8b8388a495d2728909e30460aa40dcc5d733/sdk/program/src/slot_history.rs#L48 */
     103           0 :   fd_sysvar_slot_history_set( history, fd_bank_slot_get( bank ) );
     104           0 :   history->next_slot = fd_bank_slot_get( bank ) + 1;
     105             : 
     106           0 :   fd_sysvar_slot_history_write_history( bank, accdb, xid, capture_ctx, history );
     107             : 
     108           0 :   return 0;
     109           0 : }
     110             : 
     111             : fd_slot_history_global_t *
     112             : fd_sysvar_slot_history_read( fd_funk_t *               funk,
     113             :                              fd_funk_txn_xid_t const * xid,
     114           0 :                              uchar                     out_mem[ static FD_SYSVAR_SLOT_HISTORY_FOOTPRINT ] ) {
     115             :   /* Set current_slot, and update next_slot */
     116             : 
     117           0 :   fd_pubkey_t const * key = &fd_sysvar_slot_history_id;
     118             : 
     119           0 :   fd_txn_account_t rec[1];
     120           0 :   int err = fd_txn_account_init_from_funk_readonly( rec, key, funk, xid );
     121           0 :   if( err ) {
     122           0 :     FD_LOG_CRIT(( "fd_txn_account_init_from_funk_readonly(slot_history) failed: %d", err ));
     123           0 :   }
     124             : 
     125             :   /* This check is needed as a quirk of the fuzzer. If a sysvar account
     126             :      exists in the accounts database, but doesn't have any lamports,
     127             :      this means that the account does not exist. This wouldn't happen
     128             :      in a real execution environment. */
     129           0 :   if( FD_UNLIKELY( fd_txn_account_get_lamports( rec )==0UL ) ) {
     130           0 :     return NULL;
     131           0 :   }
     132             : 
     133           0 :   ulong data_len = fd_txn_account_get_data_len( rec );
     134           0 :   if( FD_UNLIKELY( data_len>FD_SYSVAR_SLOT_HISTORY_BINCODE_SZ ) ) {
     135           0 :     FD_LOG_ERR(( "corrupt slot history sysvar: sysvar data is too large (%lu bytes)", data_len ));
     136           0 :   }
     137             : 
     138           0 :   fd_bincode_decode_ctx_t ctx = {
     139           0 :     .data    = fd_txn_account_get_data( rec ),
     140           0 :     .dataend = fd_txn_account_get_data( rec ) + data_len
     141           0 :   };
     142             : 
     143           0 :   return fd_slot_history_decode_global( out_mem, &ctx );
     144           0 : }
     145             : 
     146             : int
     147             : fd_sysvar_slot_history_find_slot( fd_slot_history_global_t const * history,
     148           0 :                                   ulong                            slot ) {
     149             : 
     150           0 :   ulong * blocks = (ulong *)((uchar*)history + history->bits_bitvec_offset);
     151           0 :   if( FD_UNLIKELY( !blocks ) ) {
     152           0 :     FD_LOG_ERR(( "Unable to find slot history blocks" ));
     153           0 :   }
     154           0 :   ulong blocks_len = history->bits_bitvec_len;
     155             : 
     156           0 :   if( slot > history->next_slot - 1UL ) {
     157           0 :     return FD_SLOT_HISTORY_SLOT_FUTURE;
     158           0 :   } else if ( slot < fd_ulong_sat_sub( history->next_slot, FD_SLOT_HISTORY_MAX_ENTRIES ) ) {
     159           0 :     return FD_SLOT_HISTORY_SLOT_TOO_OLD;
     160           0 :   } else {
     161           0 :     ulong block_idx = (slot / FD_SLOT_HISTORY_BITS_PER_BLOCK) % blocks_len;
     162           0 :     if( blocks[ block_idx ] & ( 1UL << ( slot % FD_SLOT_HISTORY_BITS_PER_BLOCK ) ) ) {
     163           0 :       return FD_SLOT_HISTORY_SLOT_FOUND;
     164           0 :     } else {
     165           0 :       return FD_SLOT_HISTORY_SLOT_NOT_FOUND;
     166           0 :     }
     167           0 :   }
     168           0 : }