Add a mixin class for piperuns that work on an LLVM module and need
both the model function and the `llvm::Function`. Pipe that inherit this
mixin will receive both the model and LLVM function in the
`runOnLLVMFunction` method.
Before this commit the port number was incorrectly increased when there
were no arguments in a function type, causing edges to be routed in a
less accurate way.
This commit fixes the problem.
This uses the "rank=source" feature of graphviz, that allows to select
what are the nodes with mimimal rank in a graph.
We use this to mark all the nodes that represent functions and segments
so that the graph layout is more deterministic and readable across
multiple runs when the input Model is very similar.
`/` is now supported in names except for the parts of the model that use
the name as the key, i.e., `DynamicFunction` and `LocalIdentifier`.
Eventually, `/` should be allowed there as well, but we first need to
make sure that when they end up in a location they are properly
escaped/unescaped.
This commit drops libptc in favor of its new form libtcg.
It brings several improvements, among which:
* The QEMU version we work on has been upgraded.
* CPUStateAccessAnalysis has been reimplemented in a way that makes it
easier to debug and solves some limitations (e.g., tracking leaking
pointers).
* Identification of pieces of the CPU state that are read by each helper
and fixing access to the CPU state is now performed at build-time.
* We no longer mmap the code we need to translate, dropping all the
issues related to code that needed to be mapped where something is
already present.
* We now have two distinct flavors of helper modules: the full one and
the "slim" one. The latter contains the definition only of functions
we intend to inline. It is used in most of the pipeline, a good thing
since we spend less time optimizing code we don't really care about.
The full module is only used on the re-compilation branch of the
pipeline.
* We no longer split the `cpu_loop` function.
* We change MetaAddress to rely on architectures from `model::` as
opposed to the LLVM ones.
* We no longer attach debug info to LLVM IR containing the original
assembly.
* We now verify that the lifted code only contains code we expect.
* Make the following private headers public:
* Lift/CPUStateAccessAnalysisPass.h
* Lift/CSVOffsets.h
* Lift/PTCDump.h
* Lift/VariableManager.h
* Move from revngSupport to revngLift:
* IRAnnotators.{h,cpp}
* SelfReferencingDbgAnnotationWriter.{h,cpp}
* Move from revngSupport to revngModel:
* FunctionTags.{h,cpp}
* ProgramCounterHandler.{h,cpp}
* Move from revngSupport to revngRecompile:
* OriginalAssemblyAnnotationWriter.{h,cpp}
Add a helper function that given a `size_t` or a tuple-like type, allows
calling a lambda with the expanded sequence pack. This avoids having to
manually create the index sequence and defining the lambda accepting it.
Some stuff that was before implicitly checked during deserialization
now need explicit checks, those are introduced here.
This also fixes test failures related to the changed serialization
format (which fields can or cannot be omitted when they have
the default value).
This commit bans from the model pointer-to-array return types in
CABIFunctionDefinition.
CABIFunctionDefinition implies we're decompiling towards C, and C does
not support such return types, because it doesn't have valid syntax to
express them without using typedefs.
This commit bans from the model array types in as argument or return
types in CABIFunctionDefinition.
CABIFunctionDefinition implies we're decompiling towards C, and C does
not support array arguments (passed by copy) nor array return types.
Banning these from the model reduces the number of situations where we
have to emit artificial array wrappers (not present in the model) around
types when printing C code, simplifying the handling of such situations
when translating to clift and in general in the decompilation pipeline.
Giacomo Vercesi