cerc-io/solidity
16
0
Fork 0
mirror of https://github.com/ethereum/solidity synced 2023-10-03 13:03:40 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Disallow language keywords to be used as identifiers by NameDispenser and VarNameCleaner

Browse Source 
Also introduce isRestrictedIdentifier helper in OptimizerUtilities
This commit is contained in:
Alex Beregszaszi 2020-07-06 18:25:12 +01:00
parent 2ebc4bb9a7
commit 2426616859
5 changed files with 21 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
Changelog.md
View File

@ -22,6 +22,7 @@ Bugfixes:
* SMTChecker: Fix internal error on fixed bytes index access.
* References Resolver: Fix internal bug when using constructor for library.
* Yul Optimizer: Make function inlining order more resilient to whether or not unrelated source files are present.
* Yul Optimizer: Ensure that Yul keywords are not mistakenly used by the NameDispenser and VarNameCleaners. The bug would manifest as uncompilable code.
* Type Checker: Disallow signed literals as exponent in exponentiation operator.
* Allow `type(Contract).name` for abstract contracts and interfaces.
* Type Checker: Disallow structs containing nested mapping in memory as parameters for library functions.

6
libyul/optimiser/NameDispenser.cpp
View File

@ -22,8 +22,10 @@
#include <libyul/optimiser/NameDispenser.h>
#include <libyul/optimiser/NameCollector.h>
#include <libyul/optimiser/OptimizerUtilities.h>
#include <libyul/AsmData.h>
#include <libyul/Dialect.h>
#include <libyul/YulString.h>
#include <libsolutil/CommonData.h>
@ -57,7 +59,5 @@ YulString NameDispenser::newName(YulString _nameHint)
bool NameDispenser::illegalName(YulString _name)
{
if (_name.empty() || m_usedNames.count(_name) || m_dialect.builtin(_name))
return true;
return false;
return isRestrictedIdentifier(m_dialect, _name) || m_usedNames.count(_name);
}

9
libyul/optimiser/OptimizerUtilities.cpp
View File

@ -21,15 +21,19 @@
#include <libyul/optimiser/OptimizerUtilities.h>
#include <libyul/Dialect.h>
#include <libyul/AsmData.h>
#include <liblangutil/Token.h>
#include <libsolutil/CommonData.h>
#include <boost/range/algorithm_ext/erase.hpp>
using namespace std;
using namespace solidity;
using namespace solidity::langutil;
using namespace solidity::util;
using namespace solidity::yul;
void yul::removeEmptyBlocks(Block& _block)
{
@ -38,3 +42,8 @@ void yul::removeEmptyBlocks(Block& _block)
};
boost::range::remove_erase_if(_block.statements, isEmptyBlock);
}
bool yul::isRestrictedIdentifier(Dialect const& _dialect, YulString const& _identifier)
{
return _identifier.empty() || TokenTraits::isYulKeyword(_identifier.str()) || _dialect.builtin(_identifier);
}

6
libyul/optimiser/OptimizerUtilities.h
View File

@ -23,6 +23,8 @@
#include <libsolutil/Common.h>
#include <libyul/AsmDataForward.h>
#include <libyul/Dialect.h>
#include <libyul/YulString.h>
namespace solidity::yul
{
@ -30,4 +32,8 @@ namespace solidity::yul
/// Removes statements that are just empty blocks (non-recursive).
void removeEmptyBlocks(Block& _block);
/// Returns true if a given literal can not be used as an identifier.
/// This includes Yul keywords and builtins of the given dialect.
bool isRestrictedIdentifier(Dialect const& _dialect, YulString const& _identifier);
}

5
libyul/optimiser/VarNameCleaner.cpp
View File

@ -17,6 +17,7 @@
// SPDX-License-Identifier: GPL-3.0
#include <libyul/optimiser/VarNameCleaner.h>
#include <libyul/optimiser/OptimizerUtilities.h>
#include <libyul/AsmData.h>
#include <libyul/Dialect.h>
@ -110,9 +111,7 @@ YulString VarNameCleaner::findCleanName(YulString const& _name) const
bool VarNameCleaner::isUsedName(YulString const& _name) const
{
if (_name.empty() || m_dialect.builtin(_name) || m_usedNames.count(_name))
return true;
return false;
return isRestrictedIdentifier(m_dialect, _name) || m_usedNames.count(_name);
}
YulString VarNameCleaner::stripSuffix(YulString const& _name) const