[llvm-pdbdump] Add an option to dump full class definitions.

This adds the --class-definitions flag.  If specified, when dumping
types, instead of "class Foo" you will see the full class definition,
with member functions, constructors, access specifiers.

NOTE: Using this option can be very slow, as generating a full class
definition requires accessing many different parts of the PDB.

llvm-svn: 230203

1 files changed, 125 insertions, 0 deletions

diff --git a/llvm/tools/llvm-pdbdump/VariableDumper.cpp b/llvm/tools/llvm-pdbdump/VariableDumper.cpp
new file mode 100644
index 00000000000..cb9c66a94b9
--- /dev/null
+++ b/llvm/tools/llvm-pdbdump/VariableDumper.cpp
@@ -0,0 +1,125 @@
+//===- VariableDumper.cpp - -------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "VariableDumper.h"
+
+#include "llvm-pdbdump.h"
+#include "FunctionDumper.h"
+
+#include "llvm/DebugInfo/PDB/PDBSymbolData.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolFunc.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolTypeArray.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolTypeBuiltin.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolTypePointer.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolTypeTypedef.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolTypeEnum.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolTypeUDT.h"
+
+#include "llvm/Support/Format.h"
+
+using namespace llvm;
+
+VariableDumper::VariableDumper() : PDBSymDumper(true) {}
+
+void VariableDumper::start(const PDBSymbolData &Var, raw_ostream &OS,
+                           int Indent) {
+  OS << newline(Indent);
+  OS << "data ";
+
+  auto VarType = Var.getType();
+
+  switch (auto LocType = Var.getLocationType()) {
+  case PDB_LocType::Static:
+    OS << "[" << format_hex(Var.getRelativeVirtualAddress(), 10) << "] ";
+    OS << "static ";
+    dumpSymbolTypeAndName(*VarType, Var.getName(), OS);
+    break;
+  case PDB_LocType::Constant:
+    OS << "const ";
+    dumpSymbolTypeAndName(*VarType, Var.getName(), OS);
+    OS << "[" << Var.getValue() << "]";
+    break;
+  case PDB_LocType::ThisRel: {
+    int Offset = Var.getOffset();
+    OS << "+" << format_hex(Var.getOffset(), 4) << " ";
+    OS.flush();
+    dumpSymbolTypeAndName(*VarType, Var.getName(), OS);
+    break;
+  }
+  default:
+    break;
+    OS << "unknown(" << LocType << ") " << Var.getName();
+  }
+}
+
+void VariableDumper::dump(const PDBSymbolTypeBuiltin &Symbol, raw_ostream &OS,
+                          int Indent) {
+  OS << Symbol.getBuiltinType();
+}
+
+void VariableDumper::dump(const PDBSymbolTypeEnum &Symbol, raw_ostream &OS,
+                          int Indent) {
+  OS << Symbol.getName();
+}
+
+void VariableDumper::dump(const PDBSymbolTypeFunctionSig &Symbol,
+                          raw_ostream &OS, int Indent) {}
+
+void VariableDumper::dump(const PDBSymbolTypePointer &Symbol, raw_ostream &OS,
+                          int Indent) {
+  uint32_t PointeeId = Symbol.getTypeId();
+  auto PointeeType = Symbol.getPointeeType();
+  if (!PointeeType)
+    return;
+
+  if (auto Func = dyn_cast<PDBSymbolFunc>(PointeeType.get())) {
+    FunctionDumper NestedDumper;
+    FunctionDumper::PointerType Pointer =
+        Symbol.isReference() ? FunctionDumper::PointerType::Reference
+                             : FunctionDumper::PointerType::Pointer;
+    NestedDumper.start(*Func, Pointer, OS, Indent);
+  } else {
+    if (Symbol.isConstType())
+      OS << "const ";
+    if (Symbol.isVolatileType())
+      OS << "volatile ";
+    PointeeType->dump(OS, Indent, *this);
+    OS << (Symbol.isReference() ? "&" : "*");
+  }
+}
+
+void VariableDumper::dump(const PDBSymbolTypeTypedef &Symbol, raw_ostream &OS,
+                          int Indent) {
+  OS << "typedef " << Symbol.getName();
+}
+
+void VariableDumper::dump(const PDBSymbolTypeUDT &Symbol, raw_ostream &OS,
+                          int Indent) {
+  OS << Symbol.getName();
+}
+
+void VariableDumper::dumpSymbolTypeAndName(const PDBSymbol &Type,
+                                           StringRef Name, raw_ostream &OS) {
+  if (auto *ArrayType = dyn_cast<PDBSymbolTypeArray>(&Type)) {
+    bool Done = false;
+    std::string IndexSpec;
+    raw_string_ostream IndexStream(IndexSpec);
+    std::unique_ptr<PDBSymbol> ElementType = ArrayType->getElementType();
+    while (auto NestedArray = dyn_cast<PDBSymbolTypeArray>(ElementType.get())) {
+      IndexStream << "[" << NestedArray->getCount() << "]";
+      ElementType = NestedArray->getElementType();
+    }
+    IndexStream << "[" << ArrayType->getCount() << "]";
+    ElementType->dump(OS, 0, *this);
+    OS << " " << Name << IndexStream.str();
+  } else {
+    Type.dump(OS, 0, *this);
+    OS << " " << Name;
+  }
+}