go-ethereum

Commit Graph

Author	SHA1	Message	Date
Martin Holst Swende	bae7565231	core/vm: fix overflow in gas calculation formula	7 years ago
Felix Lange	0cc492f815	all: update license information	8 years ago
Felix Lange	5f7826270c	all: unify big.Int zero checks, use common/math in more places (#3716 ) * 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	8 years ago
Jeffrey Wilcke	c12f4df910	params: core, core/vm, miner: 64bit gas instructions 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	8 years ago
Jeffrey Wilcke	57f4e90257	Revert "params: core, core/vm, miner: 64bit gas instructions (#3514 )" This reverts commit `8b57c49490`.	8 years ago
Jeffrey Wilcke	8b57c49490	params: core, core/vm, miner: 64bit gas instructions (#3514 ) 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	8 years ago
Jeffrey Wilcke	bbc4ea4ae8	core/vm: improved EVM run loop & instruction calling (#3378 ) 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.	8 years ago

7 Commits (1c45f2f42e6578258e74c790d063b8639ec58bc6)