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Merge pull request #4501 from ethereum/recursiveStructsWithFixedArrays

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Consider fixed-size arrays when checking for recursive structs.
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chriseth 2018-07-13 01:26:50 +02:00 committed by GitHub
commit bab4a3975f
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14 changed files with 155 additions and 12 deletions
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1
Changelog.md
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@ -65,6 +65,7 @@ Bugfixes:
* Tests: Fix chain parameters to make ipc tests work with newer versions of cpp-ethereum.
* Code Generator: Fix allocation of byte arrays (zeroed out too much memory).
* Fix NatSpec json output for `@notice` and `@dev` tags on contract definitions.
* Type Checker: Consider fixed size arrays when checking for recursive structs.
* Type System: Allow arbitrary exponents for literals with a mantissa of zero.
### 0.4.24 (2018-05-16)

27
libsolidity/analysis/TypeChecker.cpp
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@ -30,6 +30,7 @@
#include <libsolidity/inlineasm/AsmAnalysisInfo.h>
#include <libsolidity/inlineasm/AsmData.h>
#include <libsolidity/interface/ErrorReporter.h>
#include <libdevcore/Algorithms.h>
using namespace std;
using namespace dev;
@ -593,22 +594,24 @@ bool TypeChecker::visit(StructDefinition const& _struct)
m_errorReporter.typeError(member->location(), "Type cannot be used in struct.");
// Check recursion, fatal error if detected.
using StructPointer = StructDefinition const*;
using StructPointersSet = set<StructPointer>;
function<void(StructPointer,StructPointersSet const&)> check = [&](StructPointer _struct, StructPointersSet const& _parents)
auto visitor = [&](StructDefinition const& _struct, CycleDetector<StructDefinition>& _cycleDetector)
{
if (_parents.count(_struct))
m_errorReporter.fatalTypeError(_struct->location(), "Recursive struct definition.");
StructPointersSet parents = _parents;
parents.insert(_struct);
for (ASTPointer<VariableDeclaration> const& member: _struct->members())
if (type(*member)->category() == Type::Category::Struct)
for (ASTPointer<VariableDeclaration> const& member: _struct.members())
{
Type const* memberType = type(*member).get();
while (auto arrayType = dynamic_cast<ArrayType const*>(memberType))
{
auto const& typeName = dynamic_cast<UserDefinedTypeName const&>(*member->typeName());
check(&dynamic_cast<StructDefinition const&>(*typeName.annotation().referencedDeclaration), parents);
if (arrayType->isDynamicallySized())
break;
memberType = arrayType->baseType().get();
}
if (auto structType = dynamic_cast<StructType const*>(memberType))
if (_cycleDetector.run(structType->structDefinition()))
return;
}
};
check(&_struct, StructPointersSet{});
if (CycleDetector<StructDefinition>(visitor).run(_struct) != nullptr)
m_errorReporter.fatalTypeError(_struct.location(), "Recursive struct definition.");
ASTNode::listAccept(_struct.members(), *this);

7
test/libsolidity/syntaxTests/structs/recursion/struct_definition_directly_recursive_dynamic_array.sol Normal file
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@ -0,0 +1,7 @@
contract Test {
struct MyStructName {
address addr;
MyStructName[] x;
}
}
// ----

8
test/libsolidity/syntaxTests/structs/recursion/struct_definition_directly_recursive_fixed_array.sol Normal file
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@ -0,0 +1,8 @@
contract Test {
struct MyStructName {
address addr;
MyStructName[1] x;
}
}
// ----
// TypeError: (20-96): Recursive struct definition.

18
test/libsolidity/syntaxTests/structs/recursion/struct_definition_indirectly_recursive_complex.sol Normal file
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@ -0,0 +1,18 @@
contract Test {
struct MyStructName1 {
address addr;
uint256 count;
MyStructName4[1] x;
}
struct MyStructName2 {
MyStructName1 x;
}
struct MyStructName3 {
MyStructName2[1] x;
}
struct MyStructName4 {
MyStructName3 x;
}
}
// ----
// TypeError: (20-121): Recursive struct definition.

11
test/libsolidity/syntaxTests/structs/recursion/struct_definition_indirectly_recursive_dynamic_array1.sol Normal file
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@ -0,0 +1,11 @@
contract Test {
struct MyStructName1 {
address addr;
uint256 count;
MyStructName2[] x;
}
struct MyStructName2 {
MyStructName1 x;
}
}
// ----

11
test/libsolidity/syntaxTests/structs/recursion/struct_definition_indirectly_recursive_dynamic_array2.sol Normal file
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@ -0,0 +1,11 @@
contract Test {
struct MyStructName1 {
address addr;
uint256 count;
MyStructName2 x;
}
struct MyStructName2 {
MyStructName1[] x;
}
}
// ----

11
test/libsolidity/syntaxTests/structs/recursion/struct_definition_indirectly_recursive_dynamic_array3.sol Normal file
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@ -0,0 +1,11 @@
contract Test {
struct MyStructName1 {
address addr;
uint256 count;
MyStructName2[] x;
}
struct MyStructName2 {
MyStructName1[] x;
}
}
// ----

21
test/libsolidity/syntaxTests/structs/recursion/struct_definition_indirectly_recursive_dynamic_multi_array.sol Normal file
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@ -0,0 +1,21 @@
contract Test {
struct S1 {
S2[1][] x;
}
struct S2 {
S1 x;
}
struct T1 {
T2[][1] x;
}
struct T2 {
T1 x;
}
struct R1 {
R2[][] x;
}
struct R2 {
R1 x;
}
}
// ----

12
test/libsolidity/syntaxTests/structs/recursion/struct_definition_indirectly_recursive_fixed_array1.sol Normal file
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@ -0,0 +1,12 @@
contract Test {
struct MyStructName1 {
address addr;
uint256 count;
MyStructName2[1] x;
}
struct MyStructName2 {
MyStructName1 x;
}
}
// ----
// TypeError: (20-121): Recursive struct definition.

12
test/libsolidity/syntaxTests/structs/recursion/struct_definition_indirectly_recursive_fixed_array2.sol Normal file
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@ -0,0 +1,12 @@
contract Test {
struct MyStructName1 {
address addr;
uint256 count;
MyStructName2 x;
}
struct MyStructName2 {
MyStructName1[1] x;
}
}
// ----
// TypeError: (20-118): Recursive struct definition.

12
test/libsolidity/syntaxTests/structs/recursion/struct_definition_indirectly_recursive_fixed_array3.sol Normal file
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@ -0,0 +1,12 @@
contract Test {
struct MyStructName1 {
address addr;
uint256 count;
MyStructName2[1] x;
}
struct MyStructName2 {
MyStructName1[1] x;
}
}
// ----
// TypeError: (20-121): Recursive struct definition.

12
test/libsolidity/syntaxTests/structs/recursion/struct_definition_indirectly_recursive_fixed_multi_array.sol Normal file
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@ -0,0 +1,12 @@
contract Test {
struct MyStructName1 {
address addr;
uint256 count;
MyStructName2[1][1] x;
}
struct MyStructName2 {
MyStructName1 x;
}
}
// ----
// TypeError: (20-124): Recursive struct definition.

4
test/libsolidity/syntaxTests/structs/recursion/struct_definition_not_really_recursive_array.sol Normal file
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@ -0,0 +1,4 @@
contract Test {
struct S1 { uint a; }
struct S2 { S1[1] x; S1[1] y; }
}