This PR is fixing deadlock for #8918
It avoids some recursive calls on light_sync by making state check optional for Informant.
The current behavior is to display the information when informant checks if block is major version.
This change a bit the informant behavior, but not on most cases.
To remember where and how this kind of deadlock are likely to happen (not seen with Parkinglot deadlock detection because it uses std condvar), I am adding a description of the deadlock.
Also, for the reviewers there may be better solution than modifying the informant.
### Thread1
- ethcore/sync/light_sync/mod.rs
A call to the light handler through any Io (having a loop of rpc query running on like client makes the dead lock way more likely).
At the end of those calls we systematically call `maintain_sync` method.
Here maintain_sync locks `state` (it is the deadlock cause), with a write purpose
`maintain_sync` -> `begin_search` with the state locked open
`begin_search` -> lightcliennt `flush_queue` method
- ethcore/light/src/client/mod.rs
`flush_queue` -> `flush` on queue (HeaderQueue aka VerificationQueue of headers)
- ethcore/src/verification/queue/mod.rs
Condition there is some unverified or verifying content
`flush` wait on a condvar until the queue is empty. The only way to unlock condvar is that worker is empty and unlock it (so thread 2 is Verification worker).
### Thread2
A verification worker at the end of a verify loop (new block).
- ethcore/src/verification/queue/mod.rs
thread loops on `verify` method.
End of loop condition is_ready -> Import the block immediately
calls `set_sync` on QueueSignal which send a BlockVerified ClientIoMessage in inner channel (IoChannel of ClientIoMessage) using `send_sync`
- util/io/src/service_mio.rs
IoChannel `send_sync` method calls all handlers with `message` method; one of the handlers is ImportBlocks IoHandler (with a single inner Client service field)
- ethcore/light/src/client/service.rs
`message` trigger inner method `import_verified`
- core/light/src/client/mod.rs
`import_verified` at the very end notify the listeners of a new_headers, one of the listeners is Informant `listener` method
- parity/informant.rs
`newHeaders` run up to call to `is_major_importing` on its target (again clinet)
- ethcore/sync/src/light_sync/mod.rs
Here `is_major_importing` tries to get state lock (read purpose only) but cannot because of previous state lock, thus deadlock
* Add EIP-1014 transition config flag
* Remove EIP-86 configs
* Change CREATE2 opcode index to 0xf5
* Move salt to the last item in the stack
* Change sendersaltandaddress scheme to comply with current EIP-1014
* Fix json configs
* Fix create2 test
* Fix deprecated comments
- Update foundation hardcoded header to block 6219777
- Update ropsten hardcoded header to block 3917825
- Update kovan hardcoded header to block 8511489
This adds block reward contract config to ethash. A new config `blockRewardContractCode` is also added to both Aura and ethash. When specified, it will execute the code directly and overrides any `blockRewardContractAddress` config. Having this `blockRewardContractCode` config allows chains to deploy hard fork by simply replacing the current config value, without the need from us to support any `multi` block reward scheme.
* Verify private transaction before propagating
* Private transactions queue reworked with tx pool queue direct usage
* Styling fixed
* Prevent resending private packets to the sender
* Process signed private transaction packets via io queue
* Test fixed
* Build and test fixed after merge
* Comments after review fixed
* Signed transaction taken from verified
* Fix after merge
* Pool scoring generalized in order to use externally
* Lib refactored according to the review comments
* Ready state refactored
* Redundant bound and copying removed
* Fixed build after the merge
* Forgotten case reworked
* Review comments fixed
* Logging reworked, target added
* Fix after merge
* Light client on-demand request for headers range.
* Cache headers in HeaderWithAncestors response.
Also fulfills request locally if all headers are in cache.
* LightFetch::logs fetches missing headers on demand.
* LightFetch::logs limit the number of headers requested at a time.
* LightFetch::logs refactor header fetching logic.
* Enforce limit on header range length in light client logs request.
* Fix light request tests after struct change.
* Respond to review comments.
* Remove pass-by-reference return data value from executive
* Fix tests
* Fix a missing test output
* typo: wasm_activation_test
* Tracing change in output
* json_tests: fix compile
* typo: 0..32 -> ..32 to keep it consistent with other occurance
* Fix tests
* Feed in ActionParams on VM creation
* Fix ethcore after Vm interface change
* Move informant inside Interpreter struct
* Move do_trace to Interpreter struct
* Move all remaining exec variables to Interpreter struct
* Refactor VM to allow single opcode step
* Fix all EVM tests
* Fix all wasm tests
* Fix wasm runner tests
* Fix a check case where code length is zero
* Fix jsontests compile
* Fix cargo lock
* Use match instead of expect
* Use cheaper check reader.len() == 0 for the initial special case
* Get rid of try_and_done! macro by using Result<(), ReturnType>
* Use Never instead of ()
* Fix parity-bytes path
* Bypass gasometer lifetime problem by borrow only for a instance
* typo: missing {
* Fix ethcore test compile
* Fix evm tests
* Implement EIP234
* Make filter conversion returns error if both blockHash and from/toBlock is found
This also changes PollFilter to store the EthFilter type, instead of the jsonrpc one, saving repeated conversion.
* Return error if block filtering target is not found in eth_getLogs
Use the old behavior (unwrap_or_default) for anywhere else.
* fix test: secret_store
* Fix weird indentation
* Make client log filter return error in case a block cannot be found
* Return blockId error in rpc
* test_client: allow return error on logs
* Add a mocked test for eth_getLogs error
* fix: should return error if from_block/to_block greater than best block number
* Add notes on pending
* Add comment for UNSUPPORTED_REQUEST
* Address grumbles
* Return err if from > to
* ethcore: fix pow difficulty validation
* ethcore: validate difficulty is not zero
* ethcore: add issue link to regression test
* ethcore: fix tests
* ethcore: move difficulty_to_boundary to ethash crate
* ethcore: reuse difficulty_to_boundary and boundary_to_difficulty
* ethcore: fix grumbles in difficulty_to_boundary_aux
* Add a `fastmap` crate that provides the H256FastMap specialized HashMap
* Use `fastmap` instead of `plain_hasher`
* Update submodules for Reasons™
* Submodule update
Closes#9255
This PR also removes the limit of max 64 transactions per packet, currently we only attempt to prevent the packet size to go over 8MB. This will only be the case for super-large transactions or high-block-gas-limit chains.
Patching this is important only for chains that have blocks that can fit more than 4k transactions (over 86M block gas limit)
For mainnet, we should actually see a tiny bit faster propagation since instead of computing 4k pending set, we only need `4 * 8M / 21k = 1523` transactions.
Running some tests on `dekompile` node right now, to check how it performs in the wild.
* Comply EIP-86 with the new CREATE2 opcode
* Fix rpc compile
* Fix interpreter CREATE/CREATE2 stack pop difference
* Add unreachable! to fix compile
* Fix instruction_info
* Fix gas check due to new stack item
* Add new tests in executive
* Fix have_create2 comment
* Remove all unused references of eip86_transition and block_number
* Implement EIP-1052 and fix several issues related to account cache
* Fix jsontests
* Merge two matches together
* Avoid making unnecessary Arc<Vec>
* Address grumbles
* blockchain insert expects owned block instead of block reference
* reduce a number of times a block is deserialized
* removed cached uncle_bytes from block
* removed is_finalized from OpenBlock
* removed unused parity_machine::WithMetadata trait
* removed commented out code
* remove unused metadata from block
* remove unused metadata from block
* BlockDetails extras may have at most 5 elements
