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* core: vm: more change to the randomness calculation (#175)Wei-Ning Huang2019-04-091-5/+5
| | | | To prevent attacker from sending TX through a intermediate contract. Always use the original tx sender's adddress and nonce.
* core: vm: modify randomness calculation algorithm (#173)Wei-Ning Huang2019-04-091-3/+5
| | | | | | | | | | | | | | | | | | | | | | | | The original algorithm used for calculating algorithm is vulnerable to cross context re-entry attack. Example as follows: contract B { event Value(uint256 value); uint256 public value; function call() public { value = rand; emit Value(value); } } contract A { function randTwice(address bAddr) public { B b = B(bAddr); b.call.gas(100000)(); b.call.gas(100000)(); } } The two `b.call` will result in the same randomness value. This commit fix the issue by recording a called index used to store how many times opRand is called, and use it as argument to the Keccak call.
* core: vm: fix power2 table calculation (#50)Wei-Ning Huang2019-04-091-3/+3
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* core: vm: Optimize evm (#13)Jimmy Hu2019-04-091-13/+17
| | | | | | | * core: vm: add an EVM benchmark * core: vm: optimize stack allocation and instruction for calculating 2^n * Add DEXONBet bench
* core: vm: implement RAND opcode supportWei-Ning Huang2019-04-091-0/+22
| | | | | | DEXON has a built-in on chain random oracle that allow one to retrieve a random variable. Add a new opcode `RAND` to load the random variable onto the stack.
* Change import go github.com/dexon-foundation/dexonWei-Ning Huang2019-04-091-4/+4
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* vendor, crypto, swarm: switch over to upstream sha3 packageDave McGregor2019-01-041-2/+2
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* core/vm: check empty in extcodehashMartin Holst Swende2018-10-261-1/+6
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* core/vm: add shortcuts for trivial exp cases (#16851)Martin Holst Swende2018-10-161-4/+16
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* core/vm: reuse Keccak-256 hashes across opcode executions (#17863)Péter Szilágyi2018-10-081-5/+12
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* core/vm: faster create/create2 (#17806)Martin Holst Swende2018-10-041-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | * core/vm/runtim: benchmark create/create2 * core/vm: do less hashing in CREATE2 * core/vm: avoid storing jumpdest analysis for initcode * core/vm: avoid unneccesary lookups, remove unused fields * core/vm: go formatting tests * core/vm: save jumpdest analysis locally * core/vm: use common.Hash instead of nil, fix review comments * core/vm: removed type destinations * core/vm: correct check for empty hash * eth: more elegant api_tracer * core/vm: address review concerns
* all: fix various comment typos (#17748)Liang ZOU2018-09-251-1/+1
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* core/vm, tests: update tests, enable constantinople statetests, fix SAR ↵Martin Holst Swende2018-09-041-1/+1
| | | | | | | | | | | | | | | opcode (#17538) This commit does a few things at once: - Updates the tests to contain the latest data from ethereum/tests repo. - Enables Constantinople state tests. This is needed to be able to fuzz-test the evm with constantinople rules. - Fixes the error in opSAR that we've known about for some time. I was kind of saving it to see if we hit upon it with the random test generator, but it's difficult to both enable the tests and have the bug there -- we don't want to forget about it, so maybe it's better to just fix it.
* core/vm: support for multiple interpreters (#17093)Guillaume Ballet2018-07-251-188/+189
| | | | | | - Define an Interpreter interface - One contract can call contracts from other interpreter types. - Pass the interpreter to the operands instead of the evm. This is meant to prevent type assertions in operands.
* core/vm, params: implement EXTCODEHASH opcode (#17202)gary rong2018-07-241-0/+32
| | | | | | | | * core/vm, params: implement EXTCODEHASH opcode * core, params: tiny fixes and polish * core: add function description
* core, crypto, params: implement CREATE2 evm instrction (#17196)gary rong2018-07-241-0/+28
| | | | | | | | | | * core, crypto, params: implement CREATE2 evm instrction * core/vm: add opcode to string mapping * core: remove past fork checking * core, crypto: use option2 to generate new address
* core/vm: clear linter warnings (#17057)Guillaume Ballet2018-06-261-1/+1
| | | | | | | | * core/vm: clear linter warnings * core/vm: review input * core/vm.go: revert lint in noop as per request
* core/vm: optimize MSTORE and SLOAD (#16939)Martin Holst Swende2018-06-141-4/+4
| | | | | | | | | | * vm/test: add tests+benchmarks for mstore * core/vm: less alloc and copying for mstore * core/vm: less allocs in sload * vm: check for errors more correctly
* core/vm: fix typo in instructions.go (#16788)Abel Nieto2018-05-231-1/+1
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* build: enable goimports and varcheck linters (#16446)thomasmodeneis2018-04-181-1/+0
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* core: minor evm polishes and optimizationsPéter Szilágyi2018-03-261-95/+76
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* core/vm: optimize eq, slt, sgt and iszero + tests (#16047)Martin Holst Swende2018-03-081-24/+47
| | | | | | | | * vm: optimize eq, slt, sgt and iszero + tests * core/vm: fix error in slt/sgt, found by vmtests. Added testcase * core/vm: make slt/sgt cleaner
* core, vm, common: define constantinople fork + shift (#16045)Martin Holst Swende2018-02-231-0/+60
| | | | | | | | | | | | * core, vm, common: define constantinople fork, start implementation of shift instructions * vm: more testcases * vm: add tests for intpool erroneous intpool handling * core, vm, common: fix constantinople review concerns * vm: add string<->op definitions for new opcodes
* all: switch gas limits from big.Int to uint64Péter Szilágyi2018-01-031-1/+1
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* core/vm: track 63/64 call gas off stack (#15563)Felix Lange2017-11-291-43/+33
| | | | | | | | | | | | | | | | | * core/vm: track 63/64 call gas off stack Gas calculations in gasCall* relayed the available gas for calls by replacing it on the stack. This lead to inconsistent traces, which we papered over by copying the pre-execution stack in trace mode. This change relays available gas using a temporary variable, off the stack, and allows removing the weird copy. * core/vm: remove stackCopy * core/vm: pop call gas into pool * core/vm: to -> addr
* core: implement Metropolis EIP 658, receipt status byterjl4934564422017-08-221-1/+1
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* core/vm: rework reversion to work on a higher levelPéter Szilágyi2017-08-171-6/+13
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* core/vm: implement REVERT metropolis opcodeJeffrey Wilcke2017-08-161-1/+7
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* core/vm: polish RETURNDATA, add missing returns to CALL*Péter Szilágyi2017-08-161-35/+38
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* core/vm: implement RETURNDATA metropolis opcodesJeffrey Wilcke2017-08-161-0/+23
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* core/vm: implement metropolis static call opcodeJeffrey Wilcke2017-08-151-1/+32
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* core/vm: optimize copy-less data retrievalsPéter Szilágyi2017-08-141-4/+4
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* common/math, core/vm: Un-expose bigEndianByteAt, use correct terms for ↵Martin Holst Swende2017-06-071-2/+2
| | | | endianness
* core/vm, common/math: Add fast getByte for bigints, improve opByteMartin Holst Swende2017-06-051-7/+6
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* core/vm: expose intpool to stack dup methodJeffrey Wilcke2017-05-231-1/+1
| | | | | Improve the duplication method of the stack to reuse big ints by passing in an existing integer pool.
* core/vm: improved push instructionsJeffrey Wilcke2017-05-231-3/+16
| | | | | Improved push instructions by removing unnecessary big int allocations and by making it int instead of big.Int
* consensus, core/*, params: metropolis preparation refactorJeffrey Wilcke2017-05-181-10/+7
| | | | | | | | | | | | | | | | | | | | | | | | This commit is a preparation for the upcoming metropolis hardfork. It prepares the state, core and vm packages such that integration with metropolis becomes less of a hassle. * Difficulty calculation requires header instead of individual parameters * statedb.StartRecord renamed to statedb.Prepare and added Finalise method required by metropolis, which removes unwanted accounts from the state (i.e. selfdestruct) * State keeps record of destructed objects (in addition to dirty objects) * core/vm pre-compiles may now return errors * core/vm pre-compiles gas check now take the full byte slice as argument instead of just the size * core/vm now keeps several hard-fork instruction tables instead of a single instruction table and removes the need for hard-fork checks in the instructions * core/vm contains a empty restruction function which is added in preparation of metropolis write-only mode operations * Adds the bn256 curve * Adds and sets the metropolis chain config block parameters (2^64-1)
* all: unify big.Int zero checks, use common/math in more places (#3716)Felix Lange2017-02-281-11/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | * common/math: optimize PaddedBigBytes, use it more name old time/op new time/op delta PaddedBigBytes-8 71.1ns ± 5% 46.1ns ± 1% -35.15% (p=0.000 n=20+19) name old alloc/op new alloc/op delta PaddedBigBytes-8 48.0B ± 0% 32.0B ± 0% -33.33% (p=0.000 n=20+20) * all: unify big.Int zero checks Various checks were in use. This commit replaces them all with Int.Sign, which is cheaper and less code. eg templates: func before(x *big.Int) bool { return x.BitLen() == 0 } func after(x *big.Int) bool { return x.Sign() == 0 } func before(x *big.Int) bool { return x.BitLen() > 0 } func after(x *big.Int) bool { return x.Sign() != 0 } func before(x *big.Int) int { return x.Cmp(common.Big0) } func after(x *big.Int) int { return x.Sign() } * common/math, crypto/secp256k1: make ReadBits public in package math
* common: move big integer math to common/math (#3699)Felix Lange2017-02-271-30/+30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * common: remove CurrencyToString Move denomination values to params instead. * common: delete dead code * common: move big integer operations to common/math This commit consolidates all big integer operations into common/math and adds tests and documentation. There should be no change in semantics for BigPow, BigMin, BigMax, S256, U256, Exp and their behaviour is now locked in by tests. The BigD, BytesToBig and Bytes2Big functions don't provide additional value, all uses are replaced by new(big.Int).SetBytes(). BigToBytes is now called PaddedBigBytes, its minimum output size parameter is now specified as the number of bytes instead of bits. The single use of this function is in the EVM's MSTORE instruction. Big and String2Big are replaced by ParseBig, which is slightly stricter. It previously accepted leading zeros for hexadecimal inputs but treated decimal inputs as octal if a leading zero digit was present. ParseUint64 is used in places where String2Big was used to decode a uint64. The new functions MustParseBig and MustParseUint64 are now used in many places where parsing errors were previously ignored. * common: delete unused big integer variables * accounts/abi: replace uses of BytesToBig with use of encoding/binary * common: remove BytesToBig * common: remove Bytes2Big * common: remove BigTrue * cmd/utils: add BigFlag and use it for error-checked integer flags While here, remove environment variable processing for DirectoryFlag because we don't use it. * core: add missing error checks in genesis block parser * common: remove String2Big * cmd/evm: use utils.BigFlag * common/math: check for 256 bit overflow in ParseBig This is supposed to prevent silent overflow/truncation of values in the genesis block JSON. Without this check, a genesis block that set a balance larger than 256 bits would lead to weird behaviour in the VM. * cmd/utils: fixup import
* params: core, core/vm, miner: 64bit gas instructionsJeffrey Wilcke2017-02-141-127/+211
| | | | | | | | | | | | | | | | | Reworked the EVM gas instructions to use 64bit integers rather than arbitrary size big ints. All gas operations, be it additions, multiplications or divisions, are checked and guarded against 64 bit integer overflows. In additon, most of the protocol paramaters in the params package have been converted to uint64 and are now constants rather than variables. * common/math: added overflow check ops * core: vmenv, env renamed to evm * eth, internal/ethapi, les: unmetered eth_call and cancel methods * core/vm: implemented big.Int pool for evm instructions * core/vm: unexported intPool methods & verification methods * core/vm: added memoryGasCost overflow check and test
* Revert "params: core, core/vm, miner: 64bit gas instructions (#3514)"Jeffrey Wilcke2017-02-131-211/+127
| | | | This reverts commit 8b57c494908637a5c0e74f8f7a13b3218e026757.
* params: core, core/vm, miner: 64bit gas instructions (#3514)Jeffrey Wilcke2017-02-021-127/+211
| | | | | | | | | | | | | | | | Reworked the EVM gas instructions to use 64bit integers rather than arbitrary size big ints. All gas operations, be it additions, multiplications or divisions, are checked and guarded against 64 bit integer overflows. In additon, most of the protocol paramaters in the params package have been converted to uint64 and are now constants rather than variables. * common/math: added overflow check ops * core: vmenv, env renamed to evm * eth, internal/ethapi, les: unmetered eth_call and cancel methods * core/vm: implemented big.Int pool for evm instructions * core/vm: unexported intPool methods & verification methods * core/vm: added memoryGasCost overflow check and test
* cmd/geth, core: add support for recording SHA3 preimages (#3543)Nick Johnson2017-01-171-1/+6
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* core/vm: move Log to core/typesFelix Lange2017-01-061-2/+9
| | | | | | | | This significantly reduces the dependency closure of ethclient, which no longer depends on core/vm as of this change. All uses of vm.Logs are replaced by []*types.Log. NewLog is gone too, the constructor simply returned a literal.
* core/vm: improved EVM run loop & instruction calling (#3378)Jeffrey Wilcke2017-01-051-191/+165
| | | | | | | | | | | | | | | The run loop, which previously contained custom opcode executes have been removed and has been simplified to a few checks. Each operation consists of 4 elements: execution function, gas cost function, stack validation function and memory size function. The execution function implements the operation's runtime behaviour, the gas cost function implements the operation gas costs function and greatly depends on the memory and stack, the stack validation function validates the stack and makes sure that enough items can be popped off and pushed on and the memory size function calculates the memory required for the operation and returns it. This commit also allows the EVM to go unmetered. This is helpful for offline operations such as contract calls.
* core, core/vm: implemented a generic environment (#3348)Jeffrey Wilcke2016-12-061-101/+101
| | | | | | | | Environment is now a struct (not an interface). This reduces a lot of tech-debt throughout the codebase where a virtual machine environment had to be implemented in order to test or run it. The new environment is suitable to be used en the json tests, core consensus and light client.
* core, core/state, trie: EIP158, reprice & skip empty account writeJeffrey Wilcke2016-11-131-2/+2
| | | | | | | | | | | | | | | This commit implements EIP158 part 1, 2, 3 & 4 1. If an account is empty it's no longer written to the trie. An empty account is defined as (balance=0, nonce=0, storage=0, code=0). 2. Delete an empty account if it's touched 3. An empty account is redefined as either non-existent or empty. 4. Zero value calls and zero value suicides no longer consume the 25k reation costs. params: moved core/config to params Signed-off-by: Jeffrey Wilcke <jeffrey@ethereum.org>
* common/math, core/vm: implement fast EXP (#3214)Jeffrey Wilcke2016-11-021-2/+3
| | | | | | | * common/math, core/vm: implement fast EXP. Courtesy @chfast & @karalabe * common/math: fix go vet issues on exp calculation
* core, core/vm: added gas price variance tableJeffrey Wilcke2016-10-151-1/+6
| | | | | | | | | | | | | This implements 1b & 1c of EIP150 by adding a new GasTable which must be returned from the RuleSet config method. This table is used to determine the gas prices for the current epoch. Please note that when the CreateBySuicide gas price is set it is assumed that we're in the new epoch phase. In addition this PR will serve as temporary basis while refactorisation in being done in the EVM64 PR, which will substentially overhaul the gas price code.
* core/state: rename Delete/IsDeleted to Suicide/HasSuicidedFelix Lange2016-10-061-1/+1
| | | | The delete/remove naming has caused endless confusion in the past.
* core/state: track all accounts in canon stateFelix Lange2016-09-261-1/+1
| | | | | This change introduces a global, per-state cache that keeps account data in the canon state. Thanks to @karalabe for lots of fixes.
* core/vm: Refactor tracing to make Tracer the main interfaceNick Johnson2016-08-221-73/+73
| | | | | | | | | | | | | | | | | | | | | | | | | | This CL makes several refactors: - Define a Tracer interface, implementing the `CaptureState` method - Add the VM environment as the first argument of `Tracer.CaptureState` - Rename existing functionality `StructLogger` an make it an implementation of `Tracer` - Delete `StructLogCollector` and make `StructLogger` collect the logs directly - Change all callers to use the new `StructLogger` where necessary and extract logs from that. - Deletes the apparently obsolete and likely nonfunctional 'TraceCall' from the eth API. Callers that only wish accumulated logs can use the `StructLogger` implementation straightforwardly. Callers that wish to efficiently capture VM traces and operate on them without excessive copying can now implement the `Tracer` interface to receive VM state at each step and do with it as they wish. This CL also removes the accumulation of logs from the vm.Environment; this was necessary as part of the refactor, but also simplifies it by removing a responsibility that doesn't directly belong to the Environment.
* all: update license informationFelix Lange2016-04-151-1/+1
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* core: added basic chain configurationJeffrey Wilcke2016-04-011-1/+1
| | | | | | | | | Added chain configuration options and write out during genesis database insertion. If no "config" was found, nothing is written to the database. Configurations are written on a per genesis base. This means that any chain (which is identified by it's genesis hash) can have their own chain settings.
* core, core/vm, tests: changed the initialisation behaviour of the EVMJeffrey Wilcke2016-03-231-1/+0
| | | | | | | The EVM was previously initialised and created for every CALL, CALLCODE, DELEGATECALL and CREATE. This PR changes this behaviour so that the same EVM can be used through the session and beyond as long as the Environment sticks around.
* all: Rename crypto.Sha3{,Hash}() to crypto.Keccak256{,Hash}()Ricardo Catalinas Jiménez2016-02-221-1/+1
| | | | As we aren't really using the standarized SHA-3
* core, core/vm, crypto: fixes for homesteadJeffrey Wilcke2016-02-181-7/+20
| | | | | | * Removed some strange code that didn't apply state reverting properly * Refactored code setting from vm & state transition to the executioner * Updated tests
* parmas, crypto, core, core/vm: homestead consensus protocol changesGustav Simonsson2016-02-181-27/+22
| | | | | | | | * change gas cost for contract creating txs * invalidate signature with s value greater than secp256k1 N / 2 * OOG contract creation if not enough gas to store code * new difficulty adjustment algorithm * new DELEGATECALL op code
* core/vm: added JIT segmenting / optimisationsJeffrey Wilcke2015-10-171-1/+1
| | | | | * multi-push segments * static jumps segments
* core/vm: abstracted instruction execution away from JITJeffrey Wilcke2015-10-171-8/+74
| | | | | | Moved the execution of instructions to the instruction it self. This will allow for specialised instructions (e.g. segments) to be execution in the same manner as regular instructions.
* cmd/evm, core/vm, test: refactored VM and coreJeffrey Wilcke2015-10-041-102/+155
| | | | | | | | | | | | | | | | | * Moved `vm.Transfer` to `core` package and changed execution to call `env.Transfer` instead of `core.Transfer` directly. * core/vm: byte code VM moved to jump table instead of switch * Moved `vm.Transfer` to `core` package and changed execution to call `env.Transfer` instead of `core.Transfer` directly. * Byte code VM now shares the same code as the JITVM * Renamed Context to Contract * Changed initialiser of state transition & unexported methods * Removed the Execution object and refactor `Call`, `CallCode` & `Create` in to their own functions instead of being methods. * Removed the hard dep on the state for the VM. The VM now depends on a Database interface returned by the environment. In the process the core now depends less on the statedb by usage of the env * Moved `Log` from package `core/state` to package `core/vm`.
* Add tests for uncle timestamps and refactor timestamp typeGustav Simonsson2015-08-251-1/+1
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* core/vm: fixed jit error & added inline docsJeffrey Wilcke2015-08-111-11/+8
| | | | | opNumber did not create a new big int which could lead to the block's number being modified.
* core/vm: reduced big int allocationsJeffrey Wilcke2015-08-071-111/+60
| | | | | | | Reduced big int allocation by making stack items modifiable. Instead of adding items such as `common.Big0` to the stack, `new(big.Int)` is added instead. One must expect that any item that is added to the stack might change.
* core, tests: reduced state copy by N callsJeffrey Wilcke2015-08-071-0/+1
| | | | | Reduced the amount of state copied that are required by N calls by doing a balance check prior to any state modifications.
* core/vm, tests: implemented semi-jit vmJeffrey Wilcke2015-08-071-0/+587
* changed stack and removed stack ptr. Let go decide on slice reuse.
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