Introduced 2 new tags to support multidimensional arrays
Multidimensional arrays produce correct code
All types of initializations for arrays work correctly
Correct code is now generated for array initialization and element access.
Created a new binary Opcode, `IndexedElementAddress`, used to get the address of an array element, similar to how CIL does it.
Fixed simple variable initialization.
Now variables addressing correctly gets translated
Added a new test case to showcase this
Changed VoidType to ObjectType for the type of the 2 instructions
generated by as the prelude of a translated function
(UnmodeledDefinition and AliasedDefinition)
Ported basic functionalities from the C++ IR
Added a simple test that passes the IR sanity check and produces
sensible IR (together with the .expected files) to the C# test folder
This commit adds field initializers to the CFG for non-static constructors. For
example, in
```
class C
{
int Field1 = 0;
int Field2 = Field1 + 1;
int Field3;
public C()
{
Field3 = 2;
}
public C(int i)
{
Field3 = 3;
}
}
```
the initializer expressions `Field1 = 0` and `Field2 = Field1 + 1` are added
to the two constructors, mimicking
```
public C()
{
Field1 = 0;
Field2 = Field1 + 1;
Field3 = 2;
}
```
and
```
public C()
{
Field1 = 0;
Field2 = Field1 + 1;
Field3 = 3;
}
```
respectively. This means that we no longer have to synthesize calls, callables,
parameters, and arguments in the data flow library, so much of the work from
d1755500e4 can be simplified.
This file is now identical in all languages. Unifying this file led to
the following changes:
- The documentation spelling fixes and example from the C++ version
were copied to the other versions and updated.
- The steps through `NonLocalJumpNode` from C# were abstracted into a
`globalAdditionalTaintStep` predicate that's empty for C++ and Java.
- The `defaultTaintBarrier` predicate from Java is now present but empty
on C++ and C#.
- The C++ `isAdditionalFlowStep` predicate on
`TaintTracking::Configuration` no longer includes `localFlowStep`.
That should avoid some unnecessary tuple copying.
This class was copy-pasted in all `DataFlowN.qll` files without using
the identical-files system to keep the copies in sync. The class is now
moved to the `DataFlowImplN.qll` files.
This also has the effect of preventing recursion through first data flow
library copy for C/C++. Such recursion has been deprecated for over a
year, and some forms of recursions are already ruled out by the library
implementation.
There's now a `localFlowStep` predicate for use directly in queries and
other libraries and a `simpleLocalFlowStep` for use only by the global
data flow library. The former predicate is intended to include field
flow, but the latter may not.
This will let Java and C# (and possibly C++ IR) avoid getting two kinds
of field flow at the same time, both from SSA and from the global data
flow library. It should let C++ AST add some form of field flow to
`localFlowStep` without making it an input to the global data flow
library.
To keep the code changes minimal, and to keep the implementation similar
to C++ and Java, the `TaintTracking{Public,Private}` files are now
imported together through `TaintTrackingUtil`. This has the side effect
of exposing `localAdditionalTaintStep`. The corresponding predicate for
Java was already exposed.
