vendor/llvm/llvm-trunk-r300422

1 files changed, 151 insertions, 0 deletions

diff --git a/tools/llvm-pdbdump/PrettyClassLayoutGraphicalDumper.cpp b/tools/llvm-pdbdump/PrettyClassLayoutGraphicalDumper.cpp
new file mode 100644
index 000000000000..d146ca9d4712
--- /dev/null
+++ b/tools/llvm-pdbdump/PrettyClassLayoutGraphicalDumper.cpp
@@ -0,0 +1,151 @@
+//===- PrettyClassLayoutGraphicalDumper.h -----------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "PrettyClassLayoutGraphicalDumper.h"
+
+#include "LinePrinter.h"
+#include "PrettyClassDefinitionDumper.h"
+#include "PrettyVariableDumper.h"
+
+#include "llvm/DebugInfo/PDB/PDBSymbolData.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolTypeBaseClass.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolTypeUDT.h"
+#include "llvm/DebugInfo/PDB/UDTLayout.h"
+#include "llvm/Support/Format.h"
+
+using namespace llvm;
+using namespace llvm::pdb;
+
+PrettyClassLayoutGraphicalDumper::PrettyClassLayoutGraphicalDumper(
+    LinePrinter &P, uint32_t InitialOffset)
+    : PDBSymDumper(true), Printer(P), ClassOffsetZero(InitialOffset),
+      CurrentAbsoluteOffset(InitialOffset) {}
+
+bool PrettyClassLayoutGraphicalDumper::start(const UDTLayoutBase &Layout) {
+  const BitVector &UseMap = Layout.usedBytes();
+  int NextPaddingByte = UseMap.find_first_unset();
+
+  for (auto &Item : Layout.layout_items()) {
+    // Calculate the absolute offset of the first byte of the next field.
+    uint32_t RelativeOffset = Item->getOffsetInParent();
+    CurrentAbsoluteOffset = ClassOffsetZero + RelativeOffset;
+
+    // Since there is storage there, it should be set!  However, this might
+    // be an empty base, in which case it could extend outside the bounds of
+    // the parent class.
+    if (RelativeOffset < UseMap.size() && (Item->getSize() > 0)) {
+      assert(UseMap.test(RelativeOffset));
+
+      // If there is any remaining padding in this class, and the offset of the
+      // new item is after the padding, then we must have just jumped over some
+      // padding.  Print a padding row and then look for where the next block
+      // of padding begins.
+      if ((NextPaddingByte >= 0) &&
+          (RelativeOffset > uint32_t(NextPaddingByte))) {
+        printPaddingRow(RelativeOffset - NextPaddingByte);
+        NextPaddingByte = UseMap.find_next_unset(RelativeOffset);
+      }
+    }
+
+    CurrentItem = Item.get();
+    Item->getSymbol().dump(*this);
+  }
+
+  if (NextPaddingByte >= 0 && Layout.getClassSize() > 1) {
+    uint32_t Amount = Layout.getClassSize() - NextPaddingByte;
+    Printer.NewLine();
+    WithColor(Printer, PDB_ColorItem::Padding).get() << "<padding> (" << Amount
+                                                     << " bytes)";
+    DumpedAnything = true;
+  }
+
+  return DumpedAnything;
+}
+
+void PrettyClassLayoutGraphicalDumper::printPaddingRow(uint32_t Amount) {
+  if (Amount == 0)
+    return;
+
+  Printer.NewLine();
+  WithColor(Printer, PDB_ColorItem::Padding).get() << "<padding> (" << Amount
+                                                   << " bytes)";
+  DumpedAnything = true;
+}
+
+void PrettyClassLayoutGraphicalDumper::dump(
+    const PDBSymbolTypeBaseClass &Symbol) {
+  assert(CurrentItem != nullptr);
+
+  Printer.NewLine();
+  BaseClassLayout &Layout = static_cast<BaseClassLayout &>(*CurrentItem);
+
+  std::string Label = Layout.isVirtualBase() ? "vbase" : "base";
+  Printer << Label << " ";
+
+  WithColor(Printer, PDB_ColorItem::Offset).get()
+      << "+" << format_hex(CurrentAbsoluteOffset, 4)
+      << " [sizeof=" << Layout.getSize() << "] ";
+
+  WithColor(Printer, PDB_ColorItem::Identifier).get() << Layout.getName();
+
+  Printer.Indent();
+  uint32_t ChildOffsetZero = ClassOffsetZero + Layout.getOffsetInParent();
+  PrettyClassLayoutGraphicalDumper BaseDumper(Printer, ChildOffsetZero);
+  BaseDumper.start(Layout);
+  Printer.Unindent();
+
+  DumpedAnything = true;
+}
+
+void PrettyClassLayoutGraphicalDumper::dump(const PDBSymbolData &Symbol) {
+  assert(CurrentItem != nullptr);
+
+  DataMemberLayoutItem &Layout =
+      static_cast<DataMemberLayoutItem &>(*CurrentItem);
+
+  VariableDumper VarDumper(Printer);
+  VarDumper.start(Symbol, ClassOffsetZero);
+
+  if (Layout.hasUDTLayout()) {
+    Printer.Indent();
+    PrettyClassLayoutGraphicalDumper TypeDumper(Printer, ClassOffsetZero);
+    TypeDumper.start(Layout.getUDTLayout());
+    Printer.Unindent();
+  }
+
+  DumpedAnything = true;
+}
+
+void PrettyClassLayoutGraphicalDumper::dump(const PDBSymbolTypeVTable &Symbol) {
+  assert(CurrentItem != nullptr);
+
+  VTableLayoutItem &Layout = static_cast<VTableLayoutItem &>(*CurrentItem);
+
+  VariableDumper VarDumper(Printer);
+  VarDumper.start(Symbol, ClassOffsetZero);
+
+  Printer.Indent();
+  uint32_t Index = 0;
+  for (auto &Func : Layout.funcs()) {
+    Printer.NewLine();
+    std::string Name = Func->getName();
+    auto ParentClass =
+        unique_dyn_cast<PDBSymbolTypeUDT>(Func->getClassParent());
+    assert(ParentClass);
+    WithColor(Printer, PDB_ColorItem::Address).get() << " [" << Index << "] ";
+    WithColor(Printer, PDB_ColorItem::Identifier).get()
+        << "&" << ParentClass->getName();
+    Printer << "::";
+    WithColor(Printer, PDB_ColorItem::Identifier).get() << Name;
+    ++Index;
+  }
+  Printer.Unindent();
+
+  DumpedAnything = true;
+}