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params: core, core/vm, miner: 64bit gas instructions (#3514)

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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
This commit is contained in:
Jeffrey Wilcke
2017-02-02 15:25:42 +01:00
committed by GitHub
parent 296450451b
commit 8b57c49490
47 changed files with 1043 additions and 784 deletions
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14
core/vm/runtime/runtime.go
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@ -17,6 +17,7 @@
package runtime
import (
"math"
"math/big"
"time"
@ -37,7 +38,7 @@ type Config struct {
Coinbase common.Address
BlockNumber *big.Int
Time *big.Int
GasLimit *big.Int
GasLimit uint64
GasPrice *big.Int
Value *big.Int
DisableJit bool // "disable" so it's enabled by default
@ -68,8 +69,8 @@ func setDefaults(cfg *Config) {
if cfg.Time == nil {
cfg.Time = big.NewInt(time.Now().Unix())
}
if cfg.GasLimit == nil {
cfg.GasLimit = new(big.Int).Set(common.MaxBig)
if cfg.GasLimit == 0 {
cfg.GasLimit = math.MaxUint64
}
if cfg.GasPrice == nil {
cfg.GasPrice = new(big.Int)
@ -112,7 +113,7 @@ func Execute(code, input []byte, cfg *Config) ([]byte, *state.StateDB, error) {
receiver.SetCode(crypto.Keccak256Hash(code), code)
// Call the code with the given configuration.
ret, err := vmenv.Call(
ret, _, err := vmenv.Call(
sender,
receiver.Address(),
input,
@ -140,12 +141,13 @@ func Create(input []byte, cfg *Config) ([]byte, common.Address, error) {
)
// Call the code with the given configuration.
return vmenv.Create(
code, address, _, err := vmenv.Create(
sender,
input,
cfg.GasLimit,
cfg.Value,
)
return code, address, err
}
// Call executes the code given by the contract's address. It will return the
@ -160,7 +162,7 @@ func Call(address common.Address, input []byte, cfg *Config) ([]byte, error) {
sender := cfg.State.GetOrNewStateObject(cfg.Origin)
// Call the code with the given configuration.
ret, err := vmenv.Call(
ret, _, err := vmenv.Call(
sender,
address,
input,