status-im/ethereumj-personal
2
0
Fork 0
mirror of https://github.com/status-im/ethereumj-personal.git synced 2025-02-27 11:10:29 +00:00
Code Issues Projects Releases Wiki Activity

Workaround overflow bug in poc5

Browse Source
This commit is contained in:
nicksavers 2014-08-24 14:28:15 +02:00
parent 2b74aca6a9
commit a203c3a1c6
1 changed files with 4 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
ethereumj-core/src/main/java/org/ethereum/vm/VM.java
View File

@ -144,9 +144,10 @@ public class VM {
if(callGas.compareTo(program.getGas().value()) == 1) { if(callGas.compareTo(program.getGas().value()) == 1) {
throw program.new OutOfGasException(); throw program.new OutOfGasException();
} }
BigInteger x = stack.get(stack.size()-6).value().add(stack.get(stack.size()-7).value()); // Casting to long (causing overflow) as workaround for PoC5 - should be removed for PoC6
BigInteger y = stack.get(stack.size()-4).value().add(stack.get(stack.size()-5).value()); long x = stack.get(stack.size()-6).value().add(stack.get(stack.size()-7).value()).longValue();
newMemSize = x.max(y); long y = stack.get(stack.size()-4).value().add(stack.get(stack.size()-5).value()).longValue();
newMemSize = BigInteger.valueOf(Math.max(x, y));
break; break;
case CREATE: case CREATE:
program.spendGas(GasCost.CREATE, op.name()); program.spendGas(GasCost.CREATE, op.name());