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[Clang] Support includes translated to module imports in -header-include-filtering=direct-per-file #156756

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Merged
merged 6 commits into from
Sep 24, 2025
Merged

[Clang] Support includes translated to module imports in -header-include-filtering=direct-per-file #156756

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8ab5647
[Clang] Support includes translated to module imports in -header-incl…
sina-mahdavi Sep 3, 2025
c4405ab
[Clang] Include source location file name in include tracing output a…
sina-mahdavi Sep 5, 2025
e0c462e
[Clang] Add tests for -header-include-filtering=direct-per-file v2 ou…
sina-mahdavi Sep 5, 2025
e2dfe9e
Rename HeaderOrModule in HeaderIncludeGen.cpp
sina-mahdavi Sep 15, 2025
6c92ecd
Fix formatting and a compile error
sina-mahdavi Sep 19, 2025
abf1163
Fix print-header-json tests failing on Windows because of wrong path …
sina-mahdavi Sep 22, 2025
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73 changes: 60 additions & 13 deletions clang/lib/Frontend/HeaderIncludeGen.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -112,11 +112,17 @@ class HeaderIncludesJSONCallback : public PPCallbacks {
/// an array of separate entries, one for each non-system source file used in
/// the compilation showing only the direct includes and imports from that file.
class HeaderIncludesDirectPerFileCallback : public PPCallbacks {
struct HeaderIncludeInfo {
SourceLocation location;
FileEntryRef file;
const Module *importedModule;
};

SourceManager &SM;
HeaderSearch &HSI;
raw_ostream *OutputFile;
bool OwnsOutputFile;
using DependencyMap = llvm::DenseMap<FileEntryRef, SmallVector<FileEntryRef>>;
using DependencyMap = llvm::DenseMap<FileEntryRef, SmallVector<HeaderIncludeInfo>>;
DependencyMap Dependencies;

public:
Expand Down Expand Up @@ -390,18 +396,43 @@ void HeaderIncludesDirectPerFileCallback::EndOfMainFile() {
std::string Str;
llvm::raw_string_ostream OS(Str);
llvm::json::OStream JOS(OS);
JOS.array([&] {
for (auto S = SourceFiles.begin(), SE = SourceFiles.end(); S != SE; ++S) {
JOS.object([&] {
SmallVector<FileEntryRef> &Deps = Dependencies[*S];
JOS.attribute("source", S->getName().str());
JOS.attributeArray("includes", [&] {
for (unsigned I = 0, N = Deps.size(); I != N; ++I)
JOS.value(Deps[I].getName().str());
JOS.object([&] {
JOS.attribute("version", "2.0.0");
JOS.attributeArray("dependencies", [&] {
for (auto S = SourceFiles.begin(), SE = SourceFiles.end(); S != SE; ++S) {
JOS.object([&] {
SmallVector<HeaderIncludeInfo> &Deps = Dependencies[*S];
JOS.attribute("source", S->getName().str());
JOS.attributeArray("includes", [&] {
for (unsigned I = 0, N = Deps.size(); I != N; ++I) {
if (!Deps[I].importedModule) {
JOS.object([&] {
PresumedLoc PLoc = SM.getPresumedLoc(Deps[I].location);
std::string locationStr = PLoc.isInvalid() ? "<invalid>" : std::to_string(PLoc.getLine()) + ":" + std::to_string(PLoc.getColumn());
JOS.attribute("location", locationStr);
JOS.attribute("file", Deps[I].file.getName());
});
}
}
});
JOS.attributeArray("imports", [&] {
for (unsigned I = 0, N = Deps.size(); I != N; ++I) {
if (Deps[I].importedModule) {
JOS.object([&] {
PresumedLoc PLoc = SM.getPresumedLoc(Deps[I].location);
std::string locationStr = PLoc.isInvalid() ? "<invalid>" : std::to_string(PLoc.getLine()) + ":" + std::to_string(PLoc.getColumn());
JOS.attribute("location", locationStr);
JOS.attribute("module", Deps[I].importedModule->getTopLevelModuleName());
JOS.attribute("file", Deps[I].file.getName());
});
}
}
});
});
});
}
}
});
});

OS << "\n";

if (OutputFile->get_kind() == raw_ostream::OStreamKind::OK_FDStream) {
Expand All @@ -427,7 +458,19 @@ void HeaderIncludesDirectPerFileCallback::InclusionDirective(
if (!FromFile)
return;

Dependencies[*FromFile].push_back(*File);
FileEntryRef headerOrModule = *File;
if (ModuleImported && SuggestedModule) {
OptionalFileEntryRef ModuleMapFile = HSI.getModuleMap().getModuleMapFileForUniquing(SuggestedModule);
if (ModuleMapFile) {
headerOrModule = *ModuleMapFile;
}
}

Dependencies[*FromFile].push_back({
.location = Loc,
.file = headerOrModule,
.importedModule = (ModuleImported ? SuggestedModule : nullptr)
});
}

void HeaderIncludesDirectPerFileCallback::moduleImport(SourceLocation ImportLoc,
Expand All @@ -448,5 +491,9 @@ void HeaderIncludesDirectPerFileCallback::moduleImport(SourceLocation ImportLoc,
if (!ModuleMapFile)
return;

Dependencies[*FromFile].push_back(*ModuleMapFile);
Dependencies[*FromFile].push_back({
.location = Loc,
.file = *ModuleMapFile,
.importedModule = Imported
});
}