mirror of
https://github.com/JakeHillion/object-introspection.git
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a931d2f52f
Summary:
oilgen: migrate to source parsing
Using debug information generated from partial source (that is, not the final
binary) has been insufficient to generally generate OIL code.
A particular example is pointers to templates:
```cpp
#include <oi/oi.h>
template <typename T>
struct Foo {
T t;
};
template <typename T>
struct Bar {
Foo<T>& f;
};
void foo(const Bar<int>& b) {
oi::introspect(b);
}
```
The pointer/reference to `Foo<int>` appears in DWARF with
`DW_AT_declaration(true)` because it could be specialised before its usage.
However, with OIL, we are creating an implicit usage site in the
`oi::introspect` call that the compiler is unable to see.
This change reworks OILGen to work from a Clang command line rather than debug
information. We setup and run a compiler on the source, giving us access to an
AST and Semantic Analyser. We then:
- Find the `oi::introspect` template.
- Iterate through each of its callsites for their type.
- Run `ClangTypeParser::parse` on each type.
- Run codegen.
- Compile into an object file.
Having access to the semantic analyser allows us to forcefully complete a type,
as it would be if it was used in the initial code.
Test Plan:
hope
`buck2 run fbcode//mode/opt fbcode//object-introspection/oil/examples/compile-time:compile-time`
Reviewed By: tyroguru
Differential Revision: D51854477
Pulled By: JakeHillion
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|---|---|---|
| .. | ||
| AddChildren.cpp | ||
| AddChildren.h | ||
| AddPadding.cpp | ||
| AddPadding.h | ||
| AlignmentCalc.cpp | ||
| AlignmentCalc.h | ||
| ClangTypeParser.cpp | ||
| ClangTypeParser.h | ||
| CMakeLists.txt | ||
| DrgnExporter.cpp | ||
| DrgnExporter.h | ||
| DrgnParser.cpp | ||
| DrgnParser.h | ||
| EnforceCompatibility.cpp | ||
| EnforceCompatibility.h | ||
| Flattener.cpp | ||
| Flattener.h | ||
| IdentifyContainers.cpp | ||
| IdentifyContainers.h | ||
| KeyCapture.cpp | ||
| KeyCapture.h | ||
| NameGen.cpp | ||
| NameGen.h | ||
| NodeTracker.h | ||
| PassManager.cpp | ||
| PassManager.h | ||
| Printer.cpp | ||
| Printer.h | ||
| Prune.cpp | ||
| Prune.h | ||
| RemoveMembers.cpp | ||
| RemoveMembers.h | ||
| RemoveTopLevelPointer.cpp | ||
| RemoveTopLevelPointer.h | ||
| TopoSorter.cpp | ||
| TopoSorter.h | ||
| TypeGraph.cpp | ||
| TypeGraph.h | ||
| TypeIdentifier.cpp | ||
| TypeIdentifier.h | ||
| Types.cpp | ||
| Types.h | ||
| Visitor.h | ||