Line data    Source code

       1             : #include "fd_sysvar_last_restart_slot.h"
       2             : #include "fd_sysvar.h"
       3             : #include "../fd_system_ids.h"
       4             : 
       5             : void
       6             : fd_sysvar_last_restart_slot_write(
       7             :     fd_bank_t *                               bank,
       8             :     fd_funk_t *                               funk,
       9             :     fd_funk_txn_xid_t const *                 xid,
      10             :     fd_capture_ctx_t *                        capture_ctx,
      11             :     fd_sol_sysvar_last_restart_slot_t const * sysvar
      12           0 : ) {
      13           0 :   uchar enc[ 8 ];
      14           0 :   FD_STORE( ulong, enc, sysvar->slot );
      15           0 :   fd_sysvar_account_update( bank, funk, xid, capture_ctx, &fd_sysvar_last_restart_slot_id, enc, sizeof(enc) );
      16           0 : }
      17             : 
      18             : void
      19             : fd_sysvar_last_restart_slot_init( fd_bank_t *               bank,
      20             :                                   fd_funk_t *               funk,
      21             :                                   fd_funk_txn_xid_t const * xid,
      22           0 :                                   fd_capture_ctx_t *        capture_ctx ) {
      23             : 
      24           0 :   if( !FD_FEATURE_ACTIVE_BANK( bank, last_restart_slot_sysvar ) ) {
      25           0 :     return;
      26           0 :   }
      27             : 
      28           0 :   fd_sol_sysvar_last_restart_slot_t sysvar = {0};
      29           0 :   fd_sysvar_last_restart_slot_write( bank, funk, xid, capture_ctx, &sysvar );
      30           0 : }
      31             : 
      32             : /* https://github.com/anza-xyz/agave/blob/v2.3.2/runtime/src/bank.rs#L2217 */
      33             : 
      34             : ulong
      35             : fd_sysvar_last_restart_slot_derive(
      36             :     fd_hard_forks_global_t const * hard_forks,
      37             :     ulong                          current_slot
      38           0 : ) {
      39             : 
      40           0 :   if( FD_UNLIKELY( hard_forks->hard_forks_len == 0 ) ) {
      41             :     /* SIMD-0047: The first restart slot should be `0` */
      42           0 :     return 0UL;
      43           0 :   }
      44             : 
      45           0 :   fd_slot_pair_t const * head = fd_hard_forks_hard_forks_join( (fd_hard_forks_global_t *)hard_forks );
      46           0 :   fd_slot_pair_t const * tail = head + hard_forks->hard_forks_len - 1UL;
      47             : 
      48           0 :   for( fd_slot_pair_t const *pair = tail; pair >= head; pair-- ) {
      49           0 :     if( pair->slot <= current_slot ) {
      50           0 :       return pair->slot;
      51           0 :     }
      52           0 :   }
      53             : 
      54           0 :   return 0UL;
      55           0 : }
      56             : 
      57             : fd_sol_sysvar_last_restart_slot_t *
      58             : fd_sysvar_last_restart_slot_read(
      59             :     fd_funk_t *                         funk,
      60             :     fd_funk_txn_xid_t const *           xid,
      61             :     fd_sol_sysvar_last_restart_slot_t * out
      62           0 : ) {
      63             : 
      64           0 :   fd_txn_account_t acc[1];
      65           0 :   int err = fd_txn_account_init_from_funk_readonly( acc, &fd_sysvar_last_restart_slot_id, funk, xid );
      66           0 :   if( FD_UNLIKELY( err!=FD_ACC_MGR_SUCCESS ) ) return NULL;
      67             : 
      68             :   /* This check is needed as a quirk of the fuzzer. If a sysvar account
      69             :      exists in the accounts database, but doesn't have any lamports,
      70             :      this means that the account does not exist. This wouldn't happen
      71             :      in a real execution environment. */
      72           0 :   if( FD_UNLIKELY( fd_txn_account_get_lamports( acc )==0UL ) ) return NULL;
      73             : 
      74           0 :   return fd_bincode_decode_static(
      75           0 :       sol_sysvar_last_restart_slot, out,
      76           0 :       fd_txn_account_get_data( acc ),
      77           0 :       fd_txn_account_get_data_len( acc ),
      78           0 :       &err );
      79           0 : }
      80             : 
      81             : /* fd_sysvar_last_restart_slot_update is equivalent to
      82             :    Agave's solana_runtime::bank::Bank::update_last_restart_slot */
      83             : 
      84             : void
      85             : fd_sysvar_last_restart_slot_update(
      86             :     fd_bank_t *               bank,
      87             :     fd_funk_t *               funk,
      88             :     fd_funk_txn_xid_t const * xid,
      89             :     fd_capture_ctx_t *        capture_ctx,
      90             :     ulong                     last_restart_slot_want
      91           0 : ) {
      92             : 
      93             :   /* https://github.com/solana-labs/solana/blob/v1.18.18/runtime/src/bank.rs#L2093-L2095 */
      94           0 :   if( !FD_FEATURE_ACTIVE_BANK( bank, last_restart_slot_sysvar ) ) return;
      95             : 
      96             :   /* https://github.com/solana-labs/solana/blob/v1.18.18/runtime/src/bank.rs#L2098-L2106 */
      97           0 :   ulong last_restart_slot_have = ULONG_MAX;
      98           0 :   fd_sol_sysvar_last_restart_slot_t sysvar;
      99           0 :   if( FD_LIKELY( fd_sysvar_last_restart_slot_read( funk, xid, &sysvar ) ) ) {
     100           0 :     last_restart_slot_have = sysvar.slot;
     101           0 :   }
     102             : 
     103             :   /* https://github.com/solana-labs/solana/blob/v1.18.18/runtime/src/bank.rs#L2122-L2130 */
     104           0 :   if( last_restart_slot_have != last_restart_slot_want ) {
     105           0 :     sysvar.slot = last_restart_slot_want;
     106           0 :     fd_sysvar_last_restart_slot_write( bank, funk, xid, capture_ctx, &sysvar );
     107           0 :   }
     108           0 : }