[InstallAPI] Collect global functions (#83952)

* Include whether functions are inlinable as they impact whether to add
them into the tbd file and for future verification.
* Fix how clang arguments got passed along, previously spacing was
passed along to CC1 causing search path inputs to look non-existent.

Author: cyndyishida

clang/include/clang/InstallAPI/Frontend.h

@@ -50,12 +50,15 @@ class FrontendRecordsSlice : public llvm::MachO::RecordsSlice {
   /// \param D The pointer to the declaration from traversing AST.
   /// \param Access The intended access level of symbol.
   /// \param Flags The flags that describe attributes of the symbol.
+  /// \param Inlined Whether declaration is inlined, only applicable to
+  /// functions.
   /// \return The non-owning pointer to added record in slice.
   GlobalRecord *addGlobal(StringRef Name, RecordLinkage Linkage,
                           GlobalRecord::Kind GV,
                           const clang::AvailabilityInfo Avail, const Decl *D,
                           const HeaderType Access,
-                          SymbolFlags Flags = SymbolFlags::None);
+                          SymbolFlags Flags = SymbolFlags::None,
+                          bool Inlined = false);
 
   /// Add ObjC Class record with attributes from AST.
   ///

clang/include/clang/InstallAPI/Visitor.h

@@ -37,6 +37,9 @@ class InstallAPIVisitor final : public ASTConsumer,
   /// Collect global variables.
   bool VisitVarDecl(const VarDecl *D);
 
+  /// Collect global functions.
+  bool VisitFunctionDecl(const FunctionDecl *D);
+
   /// Collect Objective-C Interface declarations.
   /// Every Objective-C class has an interface declaration that lists all the
   /// ivars, properties, and methods of the class.

clang/lib/InstallAPI/Frontend.cpp

@@ -19,9 +19,10 @@ namespace clang::installapi {
 GlobalRecord *FrontendRecordsSlice::addGlobal(
     StringRef Name, RecordLinkage Linkage, GlobalRecord::Kind GV,
     const clang::AvailabilityInfo Avail, const Decl *D, const HeaderType Access,
-    SymbolFlags Flags) {
+    SymbolFlags Flags, bool Inlined) {
 
-  auto *GR = llvm::MachO::RecordsSlice::addGlobal(Name, Linkage, GV, Flags);
+  auto *GR =
+      llvm::MachO::RecordsSlice::addGlobal(Name, Linkage, GV, Flags, Inlined);
   FrontendRecords.insert({GR, FrontendAttrs{Avail, D, Access}});
   return GR;
 }

clang/lib/InstallAPI/Visitor.cpp

@@ -7,6 +7,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "clang/InstallAPI/Visitor.h"
+#include "clang/AST/ParentMapContext.h"
 #include "clang/Basic/Linkage.h"
 #include "clang/InstallAPI/Frontend.h"
 #include "llvm/ADT/SmallString.h"
@@ -27,6 +28,31 @@ static bool isExported(const NamedDecl *D) {
          (LV.getVisibility() == DefaultVisibility);
 }
 
+static bool isInlined(const FunctionDecl *D) {
+  bool HasInlineAttribute = false;
+  bool NoCXXAttr =
+      (!D->getASTContext().getLangOpts().CPlusPlus &&
+       !D->getASTContext().getTargetInfo().getCXXABI().isMicrosoft() &&
+       !D->hasAttr<DLLExportAttr>());
+
+  // Check all redeclarations to find an inline attribute or keyword.
+  for (const auto *RD : D->redecls()) {
+    if (!RD->isInlined())
+      continue;
+    HasInlineAttribute = true;
+    if (!(NoCXXAttr || RD->hasAttr<GNUInlineAttr>()))
+      continue;
+    if (RD->doesThisDeclarationHaveABody() &&
+        RD->isInlineDefinitionExternallyVisible())
+      return false;
+  }
+
+  if (!HasInlineAttribute)
+    return false;
+
+  return true;
+}
+
 static SymbolFlags getFlags(bool WeakDef, bool ThreadLocal) {
   SymbolFlags Result = SymbolFlags::None;
   if (WeakDef)
@@ -204,4 +230,56 @@ bool InstallAPIVisitor::VisitVarDecl(const VarDecl *D) {
   return true;
 }
 
+bool InstallAPIVisitor::VisitFunctionDecl(const FunctionDecl *D) {
+  if (const CXXMethodDecl *M = dyn_cast<CXXMethodDecl>(D)) {
+    // Skip member function in class templates.
+    if (M->getParent()->getDescribedClassTemplate() != nullptr)
+      return true;
+
+    // Skip methods in CXX RecordDecls.
+    for (auto P : D->getASTContext().getParents(*M)) {
+      if (P.get<CXXRecordDecl>())
+        return true;
+    }
+
+    // Skip CXX ConstructorDecls and DestructorDecls.
+    if (isa<CXXConstructorDecl>(M) || isa<CXXDestructorDecl>(M))
+      return true;
+  }
+
+  // Skip templated functions.
+  switch (D->getTemplatedKind()) {
+  case FunctionDecl::TK_NonTemplate:
+  case FunctionDecl::TK_DependentNonTemplate:
+    break;
+  case FunctionDecl::TK_MemberSpecialization:
+  case FunctionDecl::TK_FunctionTemplateSpecialization:
+    if (auto *TempInfo = D->getTemplateSpecializationInfo()) {
+      if (!TempInfo->isExplicitInstantiationOrSpecialization())
+        return true;
+    }
+    break;
+  case FunctionDecl::TK_FunctionTemplate:
+  case FunctionDecl::TK_DependentFunctionTemplateSpecialization:
+    return true;
+  }
+
+  auto Access = getAccessForDecl(D);
+  if (!Access)
+    return true;
+  auto Name = getMangledName(D);
+  const AvailabilityInfo Avail = AvailabilityInfo::createFromDecl(D);
+  const bool ExplicitInstantiation = D->getTemplateSpecializationKind() ==
+                                     TSK_ExplicitInstantiationDeclaration;
+  const bool WeakDef = ExplicitInstantiation || D->hasAttr<WeakAttr>();
+  const bool Inlined = isInlined(D);
+  const RecordLinkage Linkage = (Inlined || !isExported(D))
+                                    ? RecordLinkage::Internal
+                                    : RecordLinkage::Exported;
+  Ctx.Slice->addGlobal(Name, Linkage, GlobalRecord::Kind::Function, Avail, D,
+                       *Access, getFlags(WeakDef, /*ThreadLocal=*/false),
+                       Inlined);
+  return true;
+}
+
 } // namespace clang::installapi

clang/test/InstallAPI/functions.test

@@ -0,0 +1,78 @@
+// RUN: rm -rf %t
+// RUN: split-file %s %t
+// RUN: sed -e "s|DSTROOT|%/t|g" %t/inputs.json.in > %t/inputs.json
+
+// RUN: clang-installapi -target arm64-apple-macos13.1 \
+// RUN: -I%t/usr/include -I%t/usr/local/include \
+// RUN: -install_name @rpath/lib/libfunctions.dylib \
+// RUN: %t/inputs.json -o %t/outputs.tbd 2>&1 | FileCheck %s --allow-empty
+// RUN: llvm-readtapi -compare %t/outputs.tbd %t/expected.tbd 2>&1 | FileCheck %s --allow-empty
+
+// CHECK-NOT: error: 
+// CHECK-NOT: warning: 
+
+//--- usr/include/functions.h
+inline int inlined_func(void) { return 1;}
+int public(int a);
+
+//--- usr/local/include/private_functions.h
+__attribute__((visibility("hidden")))
+void hidden(void);
+
+//--- inputs.json.in
+{
+  "headers": [ {
+    "path" : "DSTROOT/usr/include/functions.h",
+    "type" : "public"
+  }, 
+  {
+    "path" : "DSTROOT/usr/local/include/private_functions.h",
+    "type" : "private"
+  }
+  ],
+  "version": "3"
+}
+
+//--- expected.tbd
+{
+  "main_library": {
+    "compatibility_versions": [
+      {
+        "version": "0"
+      }
+    ],
+    "current_versions": [
+      {
+        "version": "0"
+      }
+    ],
+    "exported_symbols": [
+      {
+        "text": {
+          "global": [
+            "_public"
+          ]
+        }
+      }
+    ],
+    "flags": [
+      {
+        "attributes": [
+          "not_app_extension_safe"
+        ]
+      }
+    ],
+    "install_names": [
+      {
+        "name": "@rpath/lib/libfunctions.dylib"
+      }
+    ],
+    "target_info": [
+      {
+        "min_deployment": "13.1",
+        "target": "arm64-macos"
+      }
+    ]
+  },
+  "tapi_tbd_version": 5
+}

clang/tools/clang-installapi/Options.cpp

@@ -112,7 +112,9 @@ Options::Options(DiagnosticsEngine &Diag, FileManager *FM,
   for (const Arg *A : ArgList) {
     if (A->isClaimed())
       continue;
-    FrontendArgs.emplace_back(A->getAsString(ArgList));
+
+    FrontendArgs.emplace_back(A->getSpelling());
+    llvm::copy(A->getValues(), std::back_inserter(FrontendArgs));
   }
   FrontendArgs.push_back("-fsyntax-only");
 }

llvm/include/llvm/TextAPI/Record.h

@@ -103,18 +103,20 @@ class GlobalRecord : public Record {
   };
 
   GlobalRecord(StringRef Name, RecordLinkage Linkage, SymbolFlags Flags,
-               Kind GV)
-      : Record({Name, Linkage, Flags}), GV(GV) {}
+               Kind GV, bool Inlined)
+      : Record({Name, Linkage, Flags}), GV(GV), Inlined(Inlined) {}
 
   bool isFunction() const { return GV == Kind::Function; }
   bool isVariable() const { return GV == Kind::Variable; }
   void setKind(const Kind &V) {
     if (GV == Kind::Unknown)
       GV = V;
   }
+  bool isInlined() const { return Inlined; }
 
 private:
   Kind GV;
+  bool Inlined = false;
 };
 
 // Define Objective-C instance variable records.

llvm/include/llvm/TextAPI/RecordsSlice.h

@@ -53,10 +53,13 @@ class RecordsSlice {
   /// \param Linkage The linkage of symbol.
   /// \param GV The kind of global.
   /// \param Flags The flags that describe attributes of the symbol.
+  /// \param Inlined Whether declaration is inlined, only applicable to
+  /// functions.
   /// \return The non-owning pointer to added record in slice.
   GlobalRecord *addGlobal(StringRef Name, RecordLinkage Linkage,
                           GlobalRecord::Kind GV,
-                          SymbolFlags Flags = SymbolFlags::None);
+                          SymbolFlags Flags = SymbolFlags::None,
+                          bool Inlined = false);
 
   /// Add ObjC Class record.
   ///

llvm/lib/TextAPI/RecordsSlice.cpp

@@ -171,8 +171,8 @@ ObjCIVarRecord *RecordsSlice::findObjCIVar(bool IsScopedName,
 }
 
 GlobalRecord *RecordsSlice::addGlobal(StringRef Name, RecordLinkage Linkage,
-                                      GlobalRecord::Kind GV,
-                                      SymbolFlags Flags) {
+                                      GlobalRecord::Kind GV, SymbolFlags Flags,
+                                      bool Inlined) {
   if (GV == GlobalRecord::Kind::Function)
     Flags |= SymbolFlags::Text;
   else if (GV == GlobalRecord::Kind::Variable)
@@ -182,7 +182,7 @@ GlobalRecord *RecordsSlice::addGlobal(StringRef Name, RecordLinkage Linkage,
   auto Result = Globals.insert({Name, nullptr});
   if (Result.second)
     Result.first->second =
-        std::make_unique<GlobalRecord>(Name, Linkage, Flags, GV);
+        std::make_unique<GlobalRecord>(Name, Linkage, Flags, GV, Inlined);
   else {
     updateLinkage(Result.first->second.get(), Linkage);
     updateFlags(Result.first->second.get(), Flags);

llvm/unittests/TextAPI/RecordTests.cpp

@@ -19,7 +19,7 @@ TEST(TAPIRecord, Simple) {
   GlobalRecord API{"_sym", RecordLinkage::Rexported,
                    SymbolFlags::Rexported | SymbolFlags::Text |
                        SymbolFlags::ThreadLocalValue,
-                   GlobalRecord::Kind::Function};
+                   GlobalRecord::Kind::Function, /*Inlined=*/false};
   EXPECT_TRUE(API.isExported());
   EXPECT_TRUE(API.isText());
   EXPECT_TRUE(API.isRexported());
@@ -30,6 +30,7 @@ TEST(TAPIRecord, Simple) {
   EXPECT_FALSE(API.isWeakDefined());
   EXPECT_FALSE(API.isWeakReferenced());
   EXPECT_FALSE(API.isVariable());
+  EXPECT_FALSE(API.isInlined());
 }
 
 TEST(TAPIRecord, SimpleObjC) {