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https://github.com/ethereum/go-ethereum.git
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4dc7d46155
Here, we change the EVM stack implementation to use an 'arena', i.e. a shared allocation pool for sub-call stacks. The stack is now more GC-friendly, since it is a slice of uint256 values instead of a slice of pointers. Code that pushes an item to the stack has been changed to get() the top item, then overwrite it. The PR is a rewrite/rebase of #30362. --------- Co-authored-by: Martin Holst Swende <martin@swende.se> Co-authored-by: Marius van der Wijden <m.vanderwijden@live.de>
122 lines
3.2 KiB
Go
122 lines
3.2 KiB
Go
// Copyright 2017 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package vm
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func memoryKeccak256(stack *Stack) (uint64, bool) {
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return calcMemSize64(stack.back(0), stack.back(1))
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}
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func memoryCallDataCopy(stack *Stack) (uint64, bool) {
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return calcMemSize64(stack.back(0), stack.back(2))
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}
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func memoryReturnDataCopy(stack *Stack) (uint64, bool) {
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return calcMemSize64(stack.back(0), stack.back(2))
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}
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func memoryCodeCopy(stack *Stack) (uint64, bool) {
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return calcMemSize64(stack.back(0), stack.back(2))
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}
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func memoryExtCodeCopy(stack *Stack) (uint64, bool) {
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return calcMemSize64(stack.back(1), stack.back(3))
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}
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func memoryMLoad(stack *Stack) (uint64, bool) {
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return calcMemSize64WithUint(stack.back(0), 32)
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}
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func memoryMStore8(stack *Stack) (uint64, bool) {
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return calcMemSize64WithUint(stack.back(0), 1)
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}
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func memoryMStore(stack *Stack) (uint64, bool) {
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return calcMemSize64WithUint(stack.back(0), 32)
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}
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func memoryMcopy(stack *Stack) (uint64, bool) {
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mStart := stack.back(0) // stack[0]: dest
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if stack.back(1).Gt(mStart) {
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mStart = stack.back(1) // stack[1]: source
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}
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return calcMemSize64(mStart, stack.back(2)) // stack[2]: length
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}
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func memoryCreate(stack *Stack) (uint64, bool) {
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return calcMemSize64(stack.back(1), stack.back(2))
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}
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func memoryCreate2(stack *Stack) (uint64, bool) {
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return calcMemSize64(stack.back(1), stack.back(2))
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}
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func memoryCall(stack *Stack) (uint64, bool) {
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x, overflow := calcMemSize64(stack.back(5), stack.back(6))
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if overflow {
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return 0, true
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}
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y, overflow := calcMemSize64(stack.back(3), stack.back(4))
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if overflow {
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return 0, true
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}
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if x > y {
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return x, false
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}
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return y, false
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}
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func memoryDelegateCall(stack *Stack) (uint64, bool) {
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x, overflow := calcMemSize64(stack.back(4), stack.back(5))
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if overflow {
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return 0, true
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}
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y, overflow := calcMemSize64(stack.back(2), stack.back(3))
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if overflow {
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return 0, true
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}
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if x > y {
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return x, false
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}
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return y, false
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}
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func memoryStaticCall(stack *Stack) (uint64, bool) {
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x, overflow := calcMemSize64(stack.back(4), stack.back(5))
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if overflow {
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return 0, true
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}
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y, overflow := calcMemSize64(stack.back(2), stack.back(3))
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if overflow {
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return 0, true
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}
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if x > y {
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return x, false
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}
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return y, false
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}
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func memoryReturn(stack *Stack) (uint64, bool) {
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return calcMemSize64(stack.back(0), stack.back(1))
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}
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func memoryRevert(stack *Stack) (uint64, bool) {
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return calcMemSize64(stack.back(0), stack.back(1))
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}
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func memoryLog(stack *Stack) (uint64, bool) {
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return calcMemSize64(stack.back(0), stack.back(1))
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}
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