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Prealloc memory and count gas for CALL instruction

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[#79942174]
This commit is contained in:
Paweł Bylica 2014-10-14 16:52:53 +02:00
parent d56f60f768
commit 1c70f3d099
1 changed files with 9 additions and 3 deletions
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12
evmcc/Compiler.cpp
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@ -745,9 +745,7 @@ std::unique_ptr<llvm::Module> Compiler::compile(const dev::bytes& bytecode)
auto srcDataIdx = stack.pop(); auto srcDataIdx = stack.pop();
auto reqBytes = stack.pop(); auto reqBytes = stack.pop();
// FIXME: ensure memory size reqMemSize. memory.require(destMemIdx, reqBytes);
auto reqMemSize = builder.CreateAdd(destMemIdx, reqBytes, "req_mem_size");
memory.require(reqMemSize);
auto memPtr = memory.getData(); auto memPtr = memory.getData();
auto destPtr = builder.CreateGEP(memPtr, destMemIdx, "dest_mem_ptr"); auto destPtr = builder.CreateGEP(memPtr, destMemIdx, "dest_mem_ptr");
@ -856,6 +854,14 @@ std::unique_ptr<llvm::Module> Compiler::compile(const dev::bytes& bytecode)
auto outSize = stack.pop(); auto outSize = stack.pop();
gasMeter.commitCostBlock(gas); gasMeter.commitCostBlock(gas);
// Require memory for the max of in and out buffers
auto inSizeReq = builder.CreateAdd(inOff, inSize, "inSizeReq");
auto outSizeReq = builder.CreateAdd(outOff, outSize, "outSizeReq");
auto cmp = builder.CreateICmpUGT(inSizeReq, outSizeReq);
auto sizeReq = builder.CreateSelect(cmp, inSizeReq, outSizeReq, "sizeReq");
memory.require(sizeReq);
auto ret = ext.call(gas, receiveAddress, value, inOff, inSize, outOff, outSize); auto ret = ext.call(gas, receiveAddress, value, inOff, inSize, outOff, outSize);
gasMeter.giveBack(gas); gasMeter.giveBack(gas);
stack.push(ret); stack.push(ret);