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//===- ASTSrcLocProcessor.cpp --------------------------------*- C++ -*----===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "ASTSrcLocProcessor.h"
#include "clang/Frontend/CompilerInstance.h"
#include "llvm/Support/JSON.h"
#include "llvm/Support/MemoryBuffer.h"
using namespace clang::tooling;
using namespace llvm;
using namespace clang::ast_matchers;
ASTSrcLocProcessor::ASTSrcLocProcessor(StringRef JsonPath)
: JsonPath(JsonPath) {
MatchFinder::MatchFinderOptions FinderOptions;
Finder = std::make_unique<MatchFinder>(std::move(FinderOptions));
Finder->addMatcher(
cxxRecordDecl(
isDefinition(),
isSameOrDerivedFrom(
namedDecl(
hasAnyName(
"clang::Stmt", "clang::Decl", "clang::CXXCtorInitializer",
"clang::NestedNameSpecifierLoc",
"clang::TemplateArgumentLoc", "clang::CXXBaseSpecifier",
"clang::DeclarationNameInfo", "clang::TypeLoc"))
.bind("nodeClade")),
optionally(isDerivedFrom(cxxRecordDecl().bind("derivedFrom"))))
.bind("className"),
this);
Finder->addMatcher(
cxxRecordDecl(isDefinition(), hasAnyName("clang::PointerLikeTypeLoc",
"clang::TypeofLikeTypeLoc"))
.bind("templateName"),
this);
}
std::unique_ptr<clang::ASTConsumer>
ASTSrcLocProcessor::createASTConsumer(clang::CompilerInstance &Compiler,
StringRef File) {
return Finder->newASTConsumer();
}
llvm::json::Object toJSON(llvm::StringMap<std::vector<StringRef>> const &Obj) {
using llvm::json::toJSON;
llvm::json::Object JsonObj;
for (const auto &Item : Obj) {
JsonObj[Item.first()] = Item.second;
}
return JsonObj;
}
llvm::json::Object toJSON(llvm::StringMap<std::string> const &Obj) {
using llvm::json::toJSON;
llvm::json::Object JsonObj;
for (const auto &Item : Obj) {
JsonObj[Item.first()] = Item.second;
}
return JsonObj;
}
llvm::json::Object toJSON(ClassData const &Obj) {
llvm::json::Object JsonObj;
if (!Obj.ASTClassLocations.empty())
JsonObj["sourceLocations"] = Obj.ASTClassLocations;
if (!Obj.ASTClassRanges.empty())
JsonObj["sourceRanges"] = Obj.ASTClassRanges;
if (!Obj.TemplateParms.empty())
JsonObj["templateParms"] = Obj.TemplateParms;
if (!Obj.TypeSourceInfos.empty())
JsonObj["typeSourceInfos"] = Obj.TypeSourceInfos;
if (!Obj.TypeLocs.empty())
JsonObj["typeLocs"] = Obj.TypeLocs;
if (!Obj.NestedNameLocs.empty())
JsonObj["nestedNameLocs"] = Obj.NestedNameLocs;
if (!Obj.DeclNameInfos.empty())
JsonObj["declNameInfos"] = Obj.DeclNameInfos;
return JsonObj;
}
llvm::json::Object toJSON(llvm::StringMap<ClassData> const &Obj) {
using llvm::json::toJSON;
llvm::json::Object JsonObj;
for (const auto &Item : Obj)
JsonObj[Item.first()] = ::toJSON(Item.second);
return JsonObj;
}
void WriteJSON(StringRef JsonPath, llvm::json::Object &&ClassInheritance,
llvm::json::Object &&ClassesInClade,
llvm::json::Object &&ClassEntries) {
llvm::json::Object JsonObj;
using llvm::json::toJSON;
JsonObj["classInheritance"] = std::move(ClassInheritance);
JsonObj["classesInClade"] = std::move(ClassesInClade);
JsonObj["classEntries"] = std::move(ClassEntries);
llvm::json::Value JsonVal(std::move(JsonObj));
bool WriteChange = false;
std::string OutString;
if (auto ExistingOrErr = MemoryBuffer::getFile(JsonPath, /*IsText=*/true)) {
raw_string_ostream Out(OutString);
Out << formatv("{0:2}", JsonVal);
if (ExistingOrErr.get()->getBuffer() == Out.str())
return;
WriteChange = true;
}
std::error_code EC;
llvm::raw_fd_ostream JsonOut(JsonPath, EC, llvm::sys::fs::OF_Text);
if (EC)
return;
if (WriteChange)
JsonOut << OutString;
else
JsonOut << formatv("{0:2}", JsonVal);
}
void ASTSrcLocProcessor::generate() {
WriteJSON(JsonPath, ::toJSON(ClassInheritance), ::toJSON(ClassesInClade),
::toJSON(ClassEntries));
}
void ASTSrcLocProcessor::generateEmpty() { WriteJSON(JsonPath, {}, {}, {}); }
std::vector<std::string>
CaptureMethods(std::string TypeString, const clang::CXXRecordDecl *ASTClass,
const MatchFinder::MatchResult &Result) {
auto publicAccessor = [](auto... InnerMatcher) {
return cxxMethodDecl(isPublic(), parameterCountIs(0), isConst(),
InnerMatcher...);
};
auto BoundNodesVec = match(
findAll(
publicAccessor(
ofClass(cxxRecordDecl(
equalsNode(ASTClass),
optionally(isDerivedFrom(
cxxRecordDecl(hasAnyName("clang::Stmt", "clang::Decl"))
.bind("stmtOrDeclBase"))),
optionally(isDerivedFrom(
cxxRecordDecl(hasName("clang::Expr")).bind("exprBase"))),
optionally(
isDerivedFrom(cxxRecordDecl(hasName("clang::TypeLoc"))
.bind("typeLocBase"))))),
returns(asString(TypeString)))
.bind("classMethod")),
*ASTClass, *Result.Context);
std::vector<std::string> Methods;
for (const auto &BN : BoundNodesVec) {
if (const auto *Node = BN.getNodeAs<clang::NamedDecl>("classMethod")) {
const auto *StmtOrDeclBase =
BN.getNodeAs<clang::CXXRecordDecl>("stmtOrDeclBase");
const auto *TypeLocBase =
BN.getNodeAs<clang::CXXRecordDecl>("typeLocBase");
const auto *ExprBase = BN.getNodeAs<clang::CXXRecordDecl>("exprBase");
// The clang AST has several methods on base classes which are overriden
// pseudo-virtually by derived classes.
// We record only the pseudo-virtual methods on the base classes to
// avoid duplication.
if (StmtOrDeclBase &&
(Node->getName() == "getBeginLoc" || Node->getName() == "getEndLoc" ||
Node->getName() == "getSourceRange"))
continue;
if (ExprBase && Node->getName() == "getExprLoc")
continue;
if (TypeLocBase && Node->getName() == "getLocalSourceRange")
continue;
if ((ASTClass->getName() == "PointerLikeTypeLoc" ||
ASTClass->getName() == "TypeofLikeTypeLoc") &&
Node->getName() == "getLocalSourceRange")
continue;
Methods.push_back(Node->getName().str());
}
}
return Methods;
}
void ASTSrcLocProcessor::run(const MatchFinder::MatchResult &Result) {
const auto *ASTClass =
Result.Nodes.getNodeAs<clang::CXXRecordDecl>("className");
StringRef CladeName;
if (ASTClass) {
if (const auto *NodeClade =
Result.Nodes.getNodeAs<clang::CXXRecordDecl>("nodeClade"))
CladeName = NodeClade->getName();
} else {
ASTClass = Result.Nodes.getNodeAs<clang::CXXRecordDecl>("templateName");
CladeName = "TypeLoc";
}
StringRef ClassName = ASTClass->getName();
ClassData CD;
CD.ASTClassLocations =
CaptureMethods("class clang::SourceLocation", ASTClass, Result);
CD.ASTClassRanges =
CaptureMethods("class clang::SourceRange", ASTClass, Result);
CD.TypeSourceInfos =
CaptureMethods("class clang::TypeSourceInfo *", ASTClass, Result);
CD.TypeLocs = CaptureMethods("class clang::TypeLoc", ASTClass, Result);
CD.NestedNameLocs =
CaptureMethods("class clang::NestedNameSpecifierLoc", ASTClass, Result);
CD.DeclNameInfos =
CaptureMethods("struct clang::DeclarationNameInfo", ASTClass, Result);
auto DI = CaptureMethods("const struct clang::DeclarationNameInfo &",
ASTClass, Result);
CD.DeclNameInfos.insert(CD.DeclNameInfos.end(), DI.begin(), DI.end());
if (const auto *DerivedFrom =
Result.Nodes.getNodeAs<clang::CXXRecordDecl>("derivedFrom")) {
if (const auto *Templ =
llvm::dyn_cast<clang::ClassTemplateSpecializationDecl>(
DerivedFrom)) {
const auto &TArgs = Templ->getTemplateArgs();
SmallString<256> TArgsString;
llvm::raw_svector_ostream OS(TArgsString);
OS << DerivedFrom->getName() << '<';
clang::PrintingPolicy PPol(Result.Context->getLangOpts());
PPol.TerseOutput = true;
for (unsigned I = 0; I < TArgs.size(); ++I) {
if (I > 0)
OS << ", ";
TArgs.get(I).getAsType().print(OS, PPol);
}
OS << '>';
ClassInheritance[ClassName] = TArgsString.str().str();
} else {
ClassInheritance[ClassName] = DerivedFrom->getName().str();
}
}
if (const auto *Templ = ASTClass->getDescribedClassTemplate()) {
if (auto *TParams = Templ->getTemplateParameters()) {
for (const auto &TParam : *TParams) {
CD.TemplateParms.push_back(TParam->getName().str());
}
}
}
ClassEntries[ClassName] = CD;
ClassesInClade[CladeName].push_back(ClassName);
}
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