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core/evm: avoid copying memory for input in calls (#20177)

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* core/evm, contracts: avoid copying memory for input in calls + make ecrecover not modify input buffer

* core/vm: optimize mstore a bit

* core/vm: change Get -> GetCopy in vm memory access
This commit is contained in:
Martin Holst Swende
2019-11-04 10:31:10 +01:00
committed by Péter Szilágyi
parent 7a6d5d0cce
commit b566cfdffd
6 changed files with 84 additions and 18 deletions
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4
core/vm/instructions_test.go
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@ -509,12 +509,12 @@ func TestOpMstore(t *testing.T) {
v := "abcdef00000000000000abba000000000deaf000000c0de00100000000133700"
stack.pushN(new(big.Int).SetBytes(common.Hex2Bytes(v)), big.NewInt(0))
opMstore(&pc, evmInterpreter, nil, mem, stack)
if got := common.Bytes2Hex(mem.Get(0, 32)); got != v {
if got := common.Bytes2Hex(mem.GetCopy(0, 32)); got != v {
t.Fatalf("Mstore fail, got %v, expected %v", got, v)
}
stack.pushN(big.NewInt(0x1), big.NewInt(0))
opMstore(&pc, evmInterpreter, nil, mem, stack)
if common.Bytes2Hex(mem.Get(0, 32)) != "0000000000000000000000000000000000000000000000000000000000000001" {
if common.Bytes2Hex(mem.GetCopy(0, 32)) != "0000000000000000000000000000000000000000000000000000000000000001" {
t.Fatalf("Mstore failed to overwrite previous value")
}
poolOfIntPools.put(evmInterpreter.intPool)