solidity/libsolidity/interface/StandardCompiler.cpp

649 lines
20 KiB
C++

/*
This file is part of solidity.
solidity is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
solidity is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with solidity. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @author Alex Beregszaszi
* @date 2016
* Standard JSON compiler interface.
*/
#include <libsolidity/interface/StandardCompiler.h>
#include <libsolidity/interface/SourceReferenceFormatter.h>
#include <libsolidity/ast/ASTJsonConverter.h>
#include <libevmasm/Instruction.h>
#include <libdevcore/JSON.h>
#include <libdevcore/SHA3.h>
#include <boost/algorithm/string.hpp>
using namespace std;
using namespace dev;
using namespace dev::solidity;
namespace {
Json::Value formatError(
bool _warning,
string const& _type,
string const& _component,
string const& _message,
string const& _formattedMessage = "",
Json::Value const& _sourceLocation = Json::Value()
)
{
Json::Value error = Json::objectValue;
error["type"] = _type;
error["component"] = _component;
error["severity"] = _warning ? "warning" : "error";
error["message"] = _message;
error["formattedMessage"] = (_formattedMessage.length() > 0) ? _formattedMessage : _message;
if (_sourceLocation.isObject())
error["sourceLocation"] = _sourceLocation;
return error;
}
Json::Value formatFatalError(string const& _type, string const& _message)
{
Json::Value output = Json::objectValue;
output["errors"] = Json::arrayValue;
output["errors"].append(formatError(false, _type, "general", _message));
return output;
}
Json::Value formatErrorWithException(
Exception const& _exception,
bool const& _warning,
string const& _type,
string const& _component,
string const& _message,
function<Scanner const&(string const&)> const& _scannerFromSourceName
)
{
string message;
string formattedMessage = SourceReferenceFormatter::formatExceptionInformation(_exception, _type, _scannerFromSourceName);
// NOTE: the below is partially a copy from SourceReferenceFormatter
SourceLocation const* location = boost::get_error_info<errinfo_sourceLocation>(_exception);
if (string const* description = boost::get_error_info<errinfo_comment>(_exception))
message = ((_message.length() > 0) ? (_message + ":") : "") + *description;
else
message = _message;
Json::Value sourceLocation;
if (location && location->sourceName)
{
sourceLocation["file"] = *location->sourceName;
sourceLocation["start"] = location->start;
sourceLocation["end"] = location->end;
}
return formatError(_warning, _type, _component, message, formattedMessage, sourceLocation);
}
set<string> requestedContractNames(Json::Value const& _outputSelection)
{
set<string> names;
for (auto const& sourceName: _outputSelection.getMemberNames())
{
for (auto const& contractName: _outputSelection[sourceName].getMemberNames())
{
/// Consider the "all sources" shortcuts as requesting everything.
if (contractName == "*" || contractName == "")
return set<string>();
names.insert((sourceName == "*" ? "" : sourceName) + ":" + contractName);
}
}
return names;
}
/// Returns true iff @a _hash (hex with 0x prefix) is the Keccak256 hash of the binary data in @a _content.
bool hashMatchesContent(string const& _hash, string const& _content)
{
try
{
return dev::h256(_hash) == dev::keccak256(_content);
}
catch (dev::BadHexCharacter const&)
{
return false;
}
}
StringMap createSourceList(Json::Value const& _input)
{
StringMap sources;
Json::Value const& jsonSources = _input["sources"];
if (jsonSources.isObject())
for (auto const& sourceName: jsonSources.getMemberNames())
sources[sourceName] = jsonSources[sourceName]["content"].asString();
return sources;
}
bool isArtifactRequested(Json::Value const& _outputSelection, string const& _artifact)
{
for (auto const& artifact: _outputSelection)
/// @TODO support sub-matching, e.g "evm" matches "evm.assembly"
if (artifact == "*" || artifact == _artifact)
return true;
return false;
}
///
/// @a _outputSelection is a JSON object containining a two-level hashmap, where the first level is the filename,
/// the second level is the contract name and the value is an array of artifact names to be requested for that contract.
/// @a _file is the current file
/// @a _contract is the current contract
/// @a _artifact is the current artifact name
///
/// @returns true if the @a _outputSelection has a match for the requested target in the specific file / contract.
///
/// In @a _outputSelection the use of '*' as a wildcard is permitted.
///
/// @TODO optimise this. Perhaps flatten the structure upfront.
///
bool isArtifactRequested(Json::Value const& _outputSelection, string const& _file, string const& _contract, string const& _artifact)
{
if (!_outputSelection.isObject())
return false;
for (auto const& file: { _file, string("*") })
if (_outputSelection.isMember(file) && _outputSelection[file].isObject())
{
/// For SourceUnit-level targets (such as AST) only allow empty name, otherwise
/// for Contract-level targets try both contract name and wildcard
vector<string> contracts{ _contract };
if (!_contract.empty())
contracts.push_back("*");
for (auto const& contract: contracts)
if (
_outputSelection[file].isMember(contract) &&
_outputSelection[file][contract].isArray() &&
isArtifactRequested(_outputSelection[file][contract], _artifact)
)
return true;
}
return false;
}
bool isArtifactRequested(Json::Value const& _outputSelection, string const& _file, string const& _contract, vector<string> const& _artifacts)
{
for (auto const& artifact: _artifacts)
if (isArtifactRequested(_outputSelection, _file, _contract, artifact))
return true;
return false;
}
Json::Value formatLinkReferences(std::map<size_t, std::string> const& linkReferences)
{
Json::Value ret(Json::objectValue);
for (auto const& ref: linkReferences)
{
string const& fullname = ref.second;
size_t colon = fullname.rfind(':');
solAssert(colon != string::npos, "");
string file = fullname.substr(0, colon);
string name = fullname.substr(colon + 1);
Json::Value fileObject = ret.get(file, Json::objectValue);
Json::Value libraryArray = fileObject.get(name, Json::arrayValue);
Json::Value entry = Json::objectValue;
entry["start"] = Json::UInt(ref.first);
entry["length"] = 20;
libraryArray.append(entry);
fileObject[name] = libraryArray;
ret[file] = fileObject;
}
return ret;
}
Json::Value collectEVMObject(eth::LinkerObject const& _object, string const* _sourceMap)
{
Json::Value output = Json::objectValue;
output["object"] = _object.toHex();
output["opcodes"] = solidity::disassemble(_object.bytecode);
output["sourceMap"] = _sourceMap ? *_sourceMap : "";
output["linkReferences"] = formatLinkReferences(_object.linkReferences);
return output;
}
}
Json::Value StandardCompiler::compileInternal(Json::Value const& _input)
{
m_compilerStack.reset(false);
if (!_input.isObject())
return formatFatalError("JSONError", "Input is not a JSON object.");
if (_input["language"] != "Solidity")
return formatFatalError("JSONError", "Only \"Solidity\" is supported as a language.");
Json::Value const& sources = _input["sources"];
if (!sources.isObject() && !sources.isNull())
return formatFatalError("JSONError", "\"sources\" is not a JSON object.");
if (sources.empty())
return formatFatalError("JSONError", "No input sources specified.");
Json::Value errors = Json::arrayValue;
for (auto const& sourceName: sources.getMemberNames())
{
string hash;
if (!sources[sourceName].isObject())
return formatFatalError("JSONError", "Source input is not a JSON object.");
if (sources[sourceName]["keccak256"].isString())
hash = sources[sourceName]["keccak256"].asString();
if (sources[sourceName]["content"].isString())
{
string content = sources[sourceName]["content"].asString();
if (!hash.empty() && !hashMatchesContent(hash, content))
errors.append(formatError(
false,
"IOError",
"general",
"Mismatch between content and supplied hash for \"" + sourceName + "\""
));
else
m_compilerStack.addSource(sourceName, content);
}
else if (sources[sourceName]["urls"].isArray())
{
if (!m_readFile)
return formatFatalError("JSONError", "No import callback supplied, but URL is requested.");
bool found = false;
vector<string> failures;
for (auto const& url: sources[sourceName]["urls"])
{
if (!url.isString())
return formatFatalError("JSONError", "URL must be a string.");
ReadCallback::Result result = m_readFile(url.asString());
if (result.success)
{
if (!hash.empty() && !hashMatchesContent(hash, result.responseOrErrorMessage))
errors.append(formatError(
false,
"IOError",
"general",
"Mismatch between content and supplied hash for \"" + sourceName + "\" at \"" + url.asString() + "\""
));
else
{
m_compilerStack.addSource(sourceName, result.responseOrErrorMessage);
found = true;
break;
}
}
else
failures.push_back("Cannot import url (\"" + url.asString() + "\"): " + result.responseOrErrorMessage);
}
for (auto const& failure: failures)
{
/// If the import succeeded, let mark all the others as warnings, otherwise all of them are errors.
errors.append(formatError(
found ? true : false,
"IOError",
"general",
failure
));
}
}
else
return formatFatalError("JSONError", "Invalid input source specified.");
}
Json::Value const& settings = _input.get("settings", Json::Value());
if (settings.isMember("evmVersion"))
{
if (!settings["evmVersion"].isString())
return formatFatalError("JSONError", "evmVersion must be a string.");
boost::optional<EVMVersion> version = EVMVersion::fromString(settings["evmVersion"].asString());
if (!version)
return formatFatalError("JSONError", "Invalid EVM version requested.");
m_compilerStack.setEVMVersion(*version);
}
vector<CompilerStack::Remapping> remappings;
for (auto const& remapping: settings.get("remappings", Json::Value()))
{
if (!remapping.isString())
return formatFatalError("JSONError", "Remapping entry must be a string.");
if (auto r = CompilerStack::parseRemapping(remapping.asString()))
remappings.emplace_back(std::move(*r));
else
return formatFatalError("JSONError", "Invalid remapping: \"" + remapping.asString() + "\"");
}
m_compilerStack.setRemappings(remappings);
if (settings.isMember("optimizer"))
{
Json::Value optimizerSettings = settings["optimizer"];
if (optimizerSettings.isMember("enabled"))
{
if (!optimizerSettings["enabled"].isBool())
return formatFatalError("JSONError", "The \"enabled\" setting must be a boolean.");
bool const optimize = optimizerSettings["enabled"].asBool();
unsigned optimizeRuns = 200;
if (optimizerSettings.isMember("runs"))
{
if (!optimizerSettings["runs"].isUInt())
return formatFatalError("JSONError", "The \"runs\" setting must be an unsigned number.");
optimizeRuns = optimizerSettings["runs"].asUInt();
}
m_compilerStack.setOptimiserSettings(optimize, optimizeRuns);
}
}
map<string, h160> libraries;
Json::Value jsonLibraries = settings.get("libraries", Json::Value(Json::objectValue));
if (!jsonLibraries.isObject())
return formatFatalError("JSONError", "\"libraries\" is not a JSON object.");
for (auto const& sourceName: jsonLibraries.getMemberNames())
{
auto const& jsonSourceName = jsonLibraries[sourceName];
if (!jsonSourceName.isObject())
return formatFatalError("JSONError", "Library entry is not a JSON object.");
for (auto const& library: jsonSourceName.getMemberNames())
{
if (!jsonSourceName[library].isString())
return formatFatalError("JSONError", "Library address must be a string.");
string address = jsonSourceName[library].asString();
if (!boost::starts_with(address, "0x"))
return formatFatalError(
"JSONError",
"Library address is not prefixed with \"0x\"."
);
if (address.length() != 42)
return formatFatalError(
"JSONError",
"Library address is of invalid length."
);
try
{
// @TODO use libraries only for the given source
libraries[library] = h160(address);
}
catch (dev::BadHexCharacter const&)
{
return formatFatalError(
"JSONError",
"Invalid library address (\"" + address + "\") supplied."
);
}
}
}
m_compilerStack.setLibraries(libraries);
Json::Value metadataSettings = settings.get("metadata", Json::Value());
m_compilerStack.useMetadataLiteralSources(metadataSettings.get("useLiteralContent", Json::Value(false)).asBool());
Json::Value outputSelection = settings.get("outputSelection", Json::Value());
m_compilerStack.setRequestedContractNames(requestedContractNames(outputSelection));
auto scannerFromSourceName = [&](string const& _sourceName) -> solidity::Scanner const& { return m_compilerStack.scanner(_sourceName); };
try
{
m_compilerStack.compile();
for (auto const& error: m_compilerStack.errors())
{
Error const& err = dynamic_cast<Error const&>(*error);
errors.append(formatErrorWithException(
*error,
err.type() == Error::Type::Warning,
err.typeName(),
"general",
"",
scannerFromSourceName
));
}
}
/// This is only thrown in a very few locations.
catch (Error const& _error)
{
errors.append(formatErrorWithException(
_error,
false,
_error.typeName(),
"general",
"Uncaught error: ",
scannerFromSourceName
));
}
/// This should not be leaked from compile().
catch (FatalError const& _exception)
{
errors.append(formatError(
false,
"FatalError",
"general",
"Uncaught fatal error: " + boost::diagnostic_information(_exception)
));
}
catch (CompilerError const& _exception)
{
errors.append(formatErrorWithException(
_exception,
false,
"CompilerError",
"general",
"Compiler error (" + _exception.lineInfo() + ")",
scannerFromSourceName
));
}
catch (InternalCompilerError const& _exception)
{
errors.append(formatErrorWithException(
_exception,
false,
"InternalCompilerError",
"general",
"Internal compiler error (" + _exception.lineInfo() + ")",
scannerFromSourceName
));
}
catch (UnimplementedFeatureError const& _exception)
{
errors.append(formatErrorWithException(
_exception,
false,
"UnimplementedFeatureError",
"general",
"Unimplemented feature (" + _exception.lineInfo() + ")",
scannerFromSourceName
));
}
catch (Exception const& _exception)
{
errors.append(formatError(
false,
"Exception",
"general",
"Exception during compilation: " + boost::diagnostic_information(_exception)
));
}
catch (...)
{
errors.append(formatError(
false,
"Exception",
"general",
"Unknown exception during compilation."
));
}
bool const analysisSuccess = m_compilerStack.state() >= CompilerStack::State::AnalysisSuccessful;
bool const compilationSuccess = m_compilerStack.state() == CompilerStack::State::CompilationSuccessful;
/// Inconsistent state - stop here to receive error reports from users
if (!compilationSuccess && (errors.size() == 0))
return formatFatalError("InternalCompilerError", "No error reported, but compilation failed.");
Json::Value output = Json::objectValue;
if (errors.size() > 0)
output["errors"] = errors;
output["sources"] = Json::objectValue;
unsigned sourceIndex = 0;
for (string const& sourceName: analysisSuccess ? m_compilerStack.sourceNames() : vector<string>())
{
Json::Value sourceResult = Json::objectValue;
sourceResult["id"] = sourceIndex++;
if (isArtifactRequested(outputSelection, sourceName, "", "ast"))
sourceResult["ast"] = ASTJsonConverter(false, m_compilerStack.sourceIndices()).toJson(m_compilerStack.ast(sourceName));
if (isArtifactRequested(outputSelection, sourceName, "", "legacyAST"))
sourceResult["legacyAST"] = ASTJsonConverter(true, m_compilerStack.sourceIndices()).toJson(m_compilerStack.ast(sourceName));
output["sources"][sourceName] = sourceResult;
}
Json::Value contractsOutput = Json::objectValue;
for (string const& contractName: compilationSuccess ? m_compilerStack.contractNames() : vector<string>())
{
size_t colon = contractName.rfind(':');
solAssert(colon != string::npos, "");
string file = contractName.substr(0, colon);
string name = contractName.substr(colon + 1);
// ABI, documentation and metadata
Json::Value contractData(Json::objectValue);
if (isArtifactRequested(outputSelection, file, name, "abi"))
contractData["abi"] = m_compilerStack.contractABI(contractName);
if (isArtifactRequested(outputSelection, file, name, "metadata"))
contractData["metadata"] = m_compilerStack.metadata(contractName);
if (isArtifactRequested(outputSelection, file, name, "userdoc"))
contractData["userdoc"] = m_compilerStack.natspecUser(contractName);
if (isArtifactRequested(outputSelection, file, name, "devdoc"))
contractData["devdoc"] = m_compilerStack.natspecDev(contractName);
// EVM
Json::Value evmData(Json::objectValue);
// @TODO: add ir
if (isArtifactRequested(outputSelection, file, name, "evm.assembly"))
evmData["assembly"] = m_compilerStack.assemblyString(contractName, createSourceList(_input));
if (isArtifactRequested(outputSelection, file, name, "evm.legacyAssembly"))
evmData["legacyAssembly"] = m_compilerStack.assemblyJSON(contractName, createSourceList(_input));
if (isArtifactRequested(outputSelection, file, name, "evm.methodIdentifiers"))
evmData["methodIdentifiers"] = m_compilerStack.methodIdentifiers(contractName);
if (isArtifactRequested(outputSelection, file, name, "evm.gasEstimates"))
evmData["gasEstimates"] = m_compilerStack.gasEstimates(contractName);
if (isArtifactRequested(
outputSelection,
file,
name,
{ "evm.bytecode", "evm.bytecode.object", "evm.bytecode.opcodes", "evm.bytecode.sourceMap", "evm.bytecode.linkReferences" }
))
evmData["bytecode"] = collectEVMObject(
m_compilerStack.object(contractName),
m_compilerStack.sourceMapping(contractName)
);
if (isArtifactRequested(
outputSelection,
file,
name,
{ "evm.deployedBytecode", "evm.deployedBytecode.object", "evm.deployedBytecode.opcodes", "evm.deployedBytecode.sourceMap", "evm.deployedBytecode.linkReferences" }
))
evmData["deployedBytecode"] = collectEVMObject(
m_compilerStack.runtimeObject(contractName),
m_compilerStack.runtimeSourceMapping(contractName)
);
contractData["evm"] = evmData;
if (!contractsOutput.isMember(file))
contractsOutput[file] = Json::objectValue;
contractsOutput[file][name] = contractData;
}
output["contracts"] = contractsOutput;
return output;
}
Json::Value StandardCompiler::compile(Json::Value const& _input) noexcept
{
try
{
return compileInternal(_input);
}
catch (Json::LogicError const& _exception)
{
return formatFatalError("InternalCompilerError", string("JSON logic exception: ") + _exception.what());
}
catch (Json::RuntimeError const& _exception)
{
return formatFatalError("InternalCompilerError", string("JSON runtime exception: ") + _exception.what());
}
catch (Exception const& _exception)
{
return formatFatalError("InternalCompilerError", "Internal exception in StandardCompiler::compileInternal: " + boost::diagnostic_information(_exception));
}
catch (...)
{
return formatFatalError("InternalCompilerError", "Internal exception in StandardCompiler::compileInternal");
}
}
string StandardCompiler::compile(string const& _input) noexcept
{
Json::Value input;
string errors;
try
{
if (!jsonParseStrict(_input, input, &errors))
return jsonCompactPrint(formatFatalError("JSONError", errors));
}
catch (...)
{
return "{\"errors\":[{\"type\":\"JSONError\",\"component\":\"general\",\"severity\":\"error\",\"message\":\"Error parsing input JSON.\"}]}";
}
// cout << "Input: " << input.toStyledString() << endl;
Json::Value output = compile(input);
// cout << "Output: " << output.toStyledString() << endl;
try
{
return jsonCompactPrint(output);
}
catch (...)
{
return "{\"errors\":[{\"type\":\"JSONError\",\"component\":\"general\",\"severity\":\"error\",\"message\":\"Error writing output JSON.\"}]}";
}
}