Summary of Changes:
This change adds functionality to randomize tx execution for every entry. It does this by implementing OrderedIterator that iterates tx slice as per the order specified. The order is generated randomly for every entry.
* change paths to something accounts_db (the singleton) owns, fixes SIGILL
* fail deserialize if paths don't work
serialize paths, too
* test that paths are populated from a bank snapshot
* runtime: Add bench for accounts::hash_internal_state
* fixup! cargo fmt
* fixup! cargo clippy
* fixup! Use a more representitive number of accounts
* fixup! More descriptive name for accounts creation helper
* Implement CreditOnlyLocks
* Update credit-only atomic on account load
* Update credit-only atomic after bank.freeze_lock; store credits if all credit-only lock references are dropped
* Commit credit-only credits on bank freeze
* Update core to CreditAccountLocks
* Impl credit-only in System Transfer
* Rework CreditAccountLocks, test, and fix bugs
* Review comments: Pass CreditAccountLocks by reference; Tighten up insert block
* Only store credits on completed slot
* Check balance in bench_exchange funding to ensure commit_credits has completed
* Add is_debitable info to KeyedAccount meta to pass into programs
* Reinstate CreditOnlyLocks check on lock_account
* Rework CreditAccountLocks to remove strong_count usage
* Add multi-threaded credit-only locks test
* Improve RwLocks usage
* Review comments: panic if bad things happen; tighter code
* Assert lock_accounts race does not happen
* Revert panic if bad things happen; not a bad thing
* Add credit-only debit/data check to verify_instruction
* Store credits and pass to accounts_db
* Add InstructionErrors and tests
* Relax account locks for credit-only accounts
* Collect credit-only account credits before passing to accounts_db to store properly
* Convert System Transfer accounts to credit-only, and fixup test
* Functionalize collect_accounts to unit test
* Review comments
* Rebase
* Add credit-only flag to AccountMeta, default to false
* Sort keys by is_credit_only within signed/unsigned groupings
* Process and de-dupe program keys along with other account keys
* Add message helper functions
* Fix test
* Improve comment
* s/is_credit_only/is_debitable
* Add InstructionKeys helper struct, and simplify program_position method
* Add num_readonly_accounts slice
* Impl programs in account_keys
* Emulate current account-loading functionality using program-account_keys (breaks exchange_program_api tests)
* Fix test
* Add temporary exchange faucet id
* Update chacha golden
* Split num_credit_only_accounts into separate fields
* Improve readability
* Move message field constants into Message
* Add MessageHeader struct and fixup comments
* Be able to create bank snapshots
* fix clippy
* load snapshot on start
* regenerate account index from the storage
* Remove rc feature dependency
* cleanup
* save snapshot for slot 0
* Introduce record locks on txs that will be recorded
* Add tests for LockedAccountsResults
* Fix broken bench
* Exit process_entries on detecting conflicting locks within same entry
* Add optional depth parameter to pubsub, and store in subscriptions
* Pass bank_forks into rpc_subscription; add method to check depth before notify and impl for account subscriptions
* Impl check-depth for signature subscriptions
* Impl check-depth for program subscriptions
* Plumb fork id through accounts
* Use fork id and root to prevent repeated account notifications; also s/Depth/Confirmations
* Write tests in terms of bank_forks
* Fixup accounts tests
* Add pubsub-confirmations tests
* Update pubsub documentation
* Revert "Revert "account storage is not in sync with the index after gc (#3914)" (#3936)"
This reverts commit 4f47fc00bc.
* fix get_exclusive_storage
* clippy
* account storage is not in sync with the index after gc
* builds
* clippy fmt
* test
* purge dead forks on store
* rm println
* also fixed count_stores
* comments