[PATCH] D66328: [DebugInfo] Add debug location to stubs generated by CGDeclCXX and mark them as artificial

Alexandre Ganea via Phabricator via cfe-commits Tue, 03 Sep 2019 12:27:50 -0700

aganea updated this revision to Diff 218515.
aganea marked 2 inline comments as done.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D66328/new/

https://reviews.llvm.org/D66328

Files:
  include/clang/AST/GlobalDecl.h
  lib/CodeGen/CGDebugInfo.cpp
  lib/CodeGen/CGDeclCXX.cpp
  test/CodeGenCXX/debug-info-atexit-stub.cpp
  test/CodeGenCXX/debug-info-destroy-helper.cpp
  test/CodeGenCXX/debug-info-global-ctor-dtor.cpp
  test/CodeGenCXX/debug-info-line.cpp

Index: test/CodeGenCXX/debug-info-line.cpp
===================================================================
--- test/CodeGenCXX/debug-info-line.cpp
+++ test/CodeGenCXX/debug-info-line.cpp
@@ -314,7 +314,7 @@
 // CHECK: [[DBG_F9]] = !DILocation(line: 1000,
 // CHECK: [[DBG_F10_STORE]] = !DILocation(line: 1100,
 // CHECK: [[DBG_GLBL_CTOR_B]] = !DILocation(line: 1200,
-// CHECK: [[DBG_GLBL_DTOR_B]] = !DILocation(line: 1200,
+// CHECK: [[DBG_GLBL_DTOR_B]] = !DILocation(line: 0,
 // CHECK: [[DBG_F11]] = !DILocation(line: 1300,
 // CHECK: [[DBG_F12]] = !DILocation(line: 1400,
 // CHECK: [[DBG_F13]] = !DILocation(line: 1500,
Index: test/CodeGenCXX/debug-info-global-ctor-dtor.cpp
===================================================================
--- test/CodeGenCXX/debug-info-global-ctor-dtor.cpp
+++ test/CodeGenCXX/debug-info-global-ctor-dtor.cpp
@@ -29,25 +29,26 @@
 A FooTpl<T>::sdm_tpl(sizeof(U) + sizeof(T));
 template A FooTpl<int>::sdm_tpl<int>;
 
-// CHECK-NOKEXT: !DISubprogram(name: "__cxx_global_var_init",{{.*}} line: 15,{{.*}} DISPFlagLocalToUnit | DISPFlagDefinition
-// CHECK-NOKEXT: !DISubprogram(name: "__dtor_glob",{{.*}} line: 15,{{.*}} DISPFlagLocalToUnit | DISPFlagDefinition
-// CHECK-NOKEXT: !DISubprogram(name: "__cxx_global_var_init.1",{{.*}} line: 16,{{.*}} DISPFlagLocalToUnit | DISPFlagDefinition
-// CHECK-NOKEXT: !DISubprogram(name: "__cxx_global_array_dtor",{{.*}} line: 16,{{.*}} DISPFlagLocalToUnit | DISPFlagDefinition
-// CHECK-NOKEXT: !DISubprogram(name: "__dtor_array",{{.*}} line: 16,{{.*}} DISPFlagLocalToUnit | DISPFlagDefinition
-// CHECK-NOKEXT: !DISubprogram(name: "__dtor__ZZ3foovE4stat",{{.*}} line: 19,{{.*}} DISPFlagLocalToUnit | DISPFlagDefinition
+// CHECK-NOKEXT: !DISubprogram(name: "__cxx_global_var_init",{{.*}} flags: DIFlagArtificial, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition
+// CHECK-NOKEXT: !DISubprogram(name: "__dtor_glob",{{.*}} flags: DIFlagArtificial, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition
+// CHECK-NOKEXT: !DISubprogram(name: "__cxx_global_var_init.1",{{.*}} flags: DIFlagArtificial, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition
+// CHECK-NOKEXT: !DISubprogram(name: "__cxx_global_array_dtor",{{.*}} flags: DIFlagArtificial, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition
+// CHECK-NOKEXT: !DISubprogram(name: "__dtor_array",{{.*}} flags: DIFlagArtificial, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition
+// CHECK-NOKEXT: !DISubprogram(name: "__dtor__ZZ3foovE4stat",{{.*}} flags: DIFlagArtificial, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition
 // CHECK-NOKEXT: !DISubprogram({{.*}} DISPFlagLocalToUnit | DISPFlagDefinition
 
 // CHECK-KEXT: !DISubprogram({{.*}} DISPFlagLocalToUnit | DISPFlagDefinition
 
-// CHECK-MSVC: !DISubprogram(name: "`dynamic initializer for 'glob'",{{.*}} line: 15,{{.*}}: DISPFlagLocalToUnit | DISPFlagDefinition
-// CHECK-MSVC: !DISubprogram(name: "`dynamic atexit destructor for 'glob'",{{.*}} line: 15,{{.*}}: DISPFlagLocalToUnit | DISPFlagDefinition
-// CHECK-MSVC: !DISubprogram(name: "`dynamic initializer for 'array'",{{.*}} line: 16,{{.*}}: DISPFlagLocalToUnit | DISPFlagDefinition
-// CHECK-MSVC: !DISubprogram(name: "__cxx_global_array_dtor",{{.*}} line: 16,{{.*}}: DISPFlagLocalToUnit | DISPFlagDefinition
-// CHECK-MSVC: !DISubprogram(name: "`dynamic atexit destructor for 'array'",{{.*}} line: 16,{{.*}}: DISPFlagLocalToUnit | DISPFlagDefinition
-// CHECK-MSVC: !DISubprogram(name: "`dynamic atexit destructor for 'stat'",{{.*}} line: 19,{{.*}}: DISPFlagLocalToUnit | DISPFlagDefinition
+// CHECK-MSVC: !DISubprogram(name: "`dynamic initializer for 'glob'",{{.*}} flags: DIFlagArtificial, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition
+// CHECK-MSVC: !DISubprogram(name: "`dynamic atexit destructor for 'glob'",{{.*}} flags: DIFlagArtificial, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition
+// CHECK-MSVC: !DISubprogram(name: "`dynamic initializer for 'array'",{{.*}} flags: DIFlagArtificial, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition
+// CHECK-MSVC: !DISubprogram(name: "__cxx_global_array_dtor",{{.*}} flags: DIFlagArtificial, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition
+// CHECK-MSVC: !DISubprogram(name: "`dynamic atexit destructor for 'array'",{{.*}} flags: DIFlagArtificial, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition
+// CHECK-MSVC: !DISubprogram(name: "`dynamic atexit destructor for 'stat'",{{.*}} flags: DIFlagArtificial, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition
 
 // MSVC does weird stuff when templates are involved, so we don't match exactly,
 // but these names are reasonable.
 // FIXME: These should not be marked DISPFlagLocalToUnit.
-// CHECK-MSVC: !DISubprogram(name: "FooTpl<int>::`dynamic initializer for 'sdm_tpl<int>'",{{.*}} line: 29,{{.*}}: DISPFlagLocalToUnit | DISPFlagDefinition
-// CHECK-MSVC: !DISubprogram(name: "FooTpl<int>::`dynamic atexit destructor for 'sdm_tpl<int>'",{{.*}} line: 29,{{.*}}: DISPFlagLocalToUnit | DISPFlagDefinition
+// CHECK-MSVC: !DISubprogram(name: "FooTpl<int>::`dynamic initializer for 'sdm_tpl<int>'",{{.*}} flags: DIFlagArtificial, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition
+// CHECK-MSVC: !DISubprogram(name: "FooTpl<int>::`dynamic atexit destructor for 'sdm_tpl<int>'",{{.*}} flags: DIFlagArtificial, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition
+// CHECK-MSVC: !DISubprogram(linkageName: "_GLOBAL__sub_I_debug_info_global_ctor_dtor.cpp",{{.*}} flags: DIFlagArtificial
\ No newline at end of file
Index: test/CodeGenCXX/debug-info-destroy-helper.cpp
===================================================================
--- test/CodeGenCXX/debug-info-destroy-helper.cpp
+++ test/CodeGenCXX/debug-info-destroy-helper.cpp
@@ -0,0 +1,24 @@
+// RUN: %clang_cc1 -emit-llvm %s -triple x86_64-windows-msvc -gcodeview -debug-info-kind=limited -o - | FileCheck %s
+
+struct b {
+  b(char *);
+  ~b();
+};
+struct a {
+  ~a();
+};
+struct {
+  b c;
+  const a &d;
+} e[]{nullptr, {}};
+
+// CHECK: define internal void @__cxx_global_array_dtor(i8* %0)
+// CHECK-SAME: !dbg ![[SUBPROGRAM:[0-9]+]] {
+// CHECK: arraydestroy.body
+// CHECK: %arraydestroy.elementPast =
+// CHECK-SAME: !dbg ![[LOCATION:[0-9]+]]
+// CHECK: call void @"??1<unnamed-type-e>@@QEAA@XZ"(%struct.anon* %arraydestroy.element)
+// CHECK-SAME: !dbg ![[LOCATION]]
+// CHECK: ![[SUBPROGRAM]] = distinct !DISubprogram(name: "__cxx_global_array_dtor"
+// CHECK-SAME: flags: DIFlagArtificial
+// CHECK: ![[LOCATION]] = !DILocation(line: 0,
Index: test/CodeGenCXX/debug-info-atexit-stub.cpp
===================================================================
--- test/CodeGenCXX/debug-info-atexit-stub.cpp
+++ test/CodeGenCXX/debug-info-atexit-stub.cpp
@@ -0,0 +1,20 @@
+// RUN: %clang_cc1 -emit-llvm %s -triple x86_64-windows-msvc -gcodeview -debug-info-kind=limited -o - | FileCheck %s
+
+struct a {
+  ~a();
+};
+template <typename b> struct c : a {
+  c(void (b::*)());
+};
+struct B {
+  virtual void e();
+};
+c<B> *d() { static c<B> f(&B::e); return &f; }
+
+// CHECK: define internal void @"??__Ff@?1??d@@YAPEAU?$c@UB@@@@XZ@YAXXZ"()
+// CHECK-SAME: !dbg ![[SUBPROGRAM:[0-9]+]] {
+// CHECK: call void @"??1?$c@UB@@@@QEAA@XZ"(%struct.c* @"?f@?1??d@@YAPEAU?$c@UB@@@@XZ@4U2@A"), !dbg ![[LOCATION:[0-9]+]]
+// CHECK-NEXT: ret void, !dbg ![[LOCATION]]
+// CHECK: ![[SUBPROGRAM]] = distinct !DISubprogram(name: "`dynamic atexit destructor for 'f'"
+// CHECK-SAME: flags: DIFlagArtificial
+// CHECK: ![[LOCATION]] = !DILocation(line: 0, scope: ![[SUBPROGRAM]])
\ No newline at end of file
Index: lib/CodeGen/CGDeclCXX.cpp
===================================================================
--- lib/CodeGen/CGDeclCXX.cpp
+++ lib/CodeGen/CGDeclCXX.cpp
@@ -247,6 +247,8 @@
 
   CGF.StartFunction(GlobalDecl(&VD, DynamicInitKind::AtExit),
                     CGM.getContext().VoidTy, fn, FI, FunctionArgList());
+  // Emit an artificial location for this function.
+  auto AL = ApplyDebugLocation::CreateArtificial(CGF);
 
   llvm::CallInst *call = CGF.Builder.CreateCall(dtor, addr);
 
@@ -642,8 +644,9 @@
 
   StartFunction(GlobalDecl(D, DynamicInitKind::Initializer),
                 getContext().VoidTy, Fn, getTypes().arrangeNullaryFunction(),
-                FunctionArgList(), D->getLocation(),
-                D->getInit()->getExprLoc());
+                FunctionArgList());
+  // Emit an artificial location for this function.
+  auto AL = ApplyDebugLocation::CreateArtificial(*this);
 
   // Use guarded initialization if the global variable is weak. This
   // occurs for, e.g., instantiated static data members and
@@ -669,8 +672,9 @@
                                            ConstantAddress Guard) {
   {
     auto NL = ApplyDebugLocation::CreateEmpty(*this);
-    StartFunction(GlobalDecl(), getContext().VoidTy, Fn,
-                  getTypes().arrangeNullaryFunction(), FunctionArgList());
+    StartFunction(GlobalDecl(),
+                  getContext().VoidTy, Fn, getTypes().arrangeNullaryFunction(),
+                  FunctionArgList());
     // Emit an artificial location for this function.
     auto AL = ApplyDebugLocation::CreateArtificial(*this);
 
@@ -728,8 +732,9 @@
                                  llvm::Constant *>> &DtorsAndObjects) {
   {
     auto NL = ApplyDebugLocation::CreateEmpty(*this);
-    StartFunction(GlobalDecl(), getContext().VoidTy, Fn,
-                  getTypes().arrangeNullaryFunction(), FunctionArgList());
+    StartFunction(GlobalDecl(),
+                  getContext().VoidTy, Fn, getTypes().arrangeNullaryFunction(),
+                  FunctionArgList());
     // Emit an artificial location for this function.
     auto AL = ApplyDebugLocation::CreateArtificial(*this);
 
@@ -768,7 +773,10 @@
 
   CurEHLocation = VD->getBeginLoc();
 
-  StartFunction(VD, getContext().VoidTy, fn, FI, args);
+  StartFunction(GlobalDecl(VD, DynamicInitKind::GlobalDestructor),
+                getContext().VoidTy, fn, FI, args);
+  // Emit an artificial location for this function.
+  auto AL = ApplyDebugLocation::CreateArtificial(*this);
 
   emitDestroy(addr, type, destroyer, useEHCleanupForArray);
 
Index: lib/CodeGen/CGDebugInfo.cpp
===================================================================
--- lib/CodeGen/CGDebugInfo.cpp
+++ lib/CodeGen/CGDebugInfo.cpp
@@ -1910,7 +1910,8 @@
                                                  llvm::Function *InitFn) {
   // If we're not emitting codeview, use the mangled name. For Itanium, this is
   // arbitrary.
-  if (!CGM.getCodeGenOpts().EmitCodeView)
+  if (!CGM.getCodeGenOpts().EmitCodeView ||
+      StubKind == DynamicInitKind::GlobalDestructor)
     return InitFn->getName();
 
   // Print the normal qualified name for the variable, then break off the last
@@ -1935,6 +1936,7 @@
 
   switch (StubKind) {
   case DynamicInitKind::NoStub:
+  case DynamicInitKind::GlobalDestructor:
     llvm_unreachable("not an initializer");
   case DynamicInitKind::Initializer:
     OS << "`dynamic initializer for '";
@@ -3569,7 +3571,8 @@
   if (Name.startswith("\01"))
     Name = Name.substr(1);
 
-  if (!HasDecl || D->isImplicit() || D->hasAttr<ArtificialAttr>()) {
+  if (!HasDecl || D->isImplicit() || D->hasAttr<ArtificialAttr>() ||
+      (isa<VarDecl>(D) && GD.getDynamicInitKind() != DynamicInitKind::NoStub)) {
     Flags |= llvm::DINode::FlagArtificial;
     // Artificial functions should not silently reuse CurLoc.
     CurLoc = SourceLocation();
Index: include/clang/AST/GlobalDecl.h
===================================================================
--- include/clang/AST/GlobalDecl.h
+++ include/clang/AST/GlobalDecl.h
@@ -31,6 +31,7 @@
   NoStub = 0,
   Initializer,
   AtExit,
+  GlobalDestructor
 };
 
 /// GlobalDecl - represents a global declaration. This can either be a

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[PATCH] D66328: [DebugInfo] Add debug location to stubs generated by CGDeclCXX and mark them as artificial

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