Use ArrayRef instead of 'const std::vector' to pass around the list of basic blocks...

[oota-llvm.git] / lib / DebugInfo / DWARFContext.cpp

diff --git a/lib/DebugInfo/DWARFContext.cpp b/lib/DebugInfo/DWARFContext.cpp
index 513e415fa54216fb7f27ab0f95eb592cb21dfe3e..e1ac398b10116cf5eb11ded835a87f403bf4a417 100644 (file)
--- a/lib/DebugInfo/DWARFContext.cpp
+++ b/lib/DebugInfo/DWARFContext.cpp
@@ -8,12 +8,50 @@
 //===----------------------------------------------------------------------===//
 
 #include "DWARFContext.h"
+#include "llvm/Support/Dwarf.h"
+#include "llvm/Support/Format.h"
+#include "llvm/Support/raw_ostream.h"
+#include <algorithm>
 using namespace llvm;
+using namespace dwarf;
 
 void DWARFContext::dump(raw_ostream &OS) {
+  OS << ".debug_abbrev contents:\n";
   getDebugAbbrev()->dump(OS);
+
+  OS << "\n.debug_info contents:\n";
   for (unsigned i = 0, e = getNumCompileUnits(); i != e; ++i)
     getCompileUnitAtIndex(i)->dump(OS);
+
+  OS << "\n.debug_aranges contents:\n";
+  DataExtractor arangesData(getARangeSection(), isLittleEndian(), 0);
+  uint32_t offset = 0;
+  DWARFDebugArangeSet set;
+  while (set.extract(arangesData, &offset))
+    set.dump(OS);
+
+  OS << "\n.debug_lines contents:\n";
+  for (unsigned i = 0, e = getNumCompileUnits(); i != e; ++i) {
+    DWARFCompileUnit *cu = getCompileUnitAtIndex(i);
+    unsigned stmtOffset =
+      cu->getCompileUnitDIE()->getAttributeValueAsUnsigned(cu, DW_AT_stmt_list,
+                                                           -1U);
+    if (stmtOffset != -1U) {
+      DataExtractor lineData(getLineSection(), isLittleEndian(),
+                             cu->getAddressByteSize());
+      DWARFDebugLine::DumpingState state(OS);
+      DWARFDebugLine::parseStatementTable(lineData, &stmtOffset, state);
+    }
+  }
+
+  OS << "\n.debug_str contents:\n";
+  DataExtractor strData(getStringSection(), isLittleEndian(), 0);
+  offset = 0;
+  uint32_t lastOffset = 0;
+  while (const char *s = strData.getCStr(&offset)) {
+    OS << format("0x%8.8x: \"%s\"\n", lastOffset, s);
+    lastOffset = offset;
+  }
 }
 
 const DWARFDebugAbbrev *DWARFContext::getDebugAbbrev() {
@@ -27,6 +65,40 @@ const DWARFDebugAbbrev *DWARFContext::getDebugAbbrev() {
   return Abbrev.get();
 }
 
+const DWARFDebugAranges *DWARFContext::getDebugAranges() {
+  if (Aranges)
+    return Aranges.get();
+
+  DataExtractor arangesData(getARangeSection(), isLittleEndian(), 0);
+
+  Aranges.reset(new DWARFDebugAranges());
+  Aranges->extract(arangesData);
+  if (Aranges->isEmpty()) // No aranges in file, generate them from the DIEs.
+    Aranges->generate(this);
+  return Aranges.get();
+}
+
+const DWARFDebugLine::LineTable *
+DWARFContext::getLineTableForCompileUnit(DWARFCompileUnit *cu) {
+  if (!Line)
+    Line.reset(new DWARFDebugLine());
+
+  unsigned stmtOffset =
+    cu->getCompileUnitDIE()->getAttributeValueAsUnsigned(cu, DW_AT_stmt_list,
+                                                         -1U);
+  if (stmtOffset == -1U)
+    return 0; // No line table for this compile unit.
+
+  // See if the line table is cached.
+  if (const DWARFDebugLine::LineTable *lt = Line->getLineTable(stmtOffset))
+    return lt;
+
+  // We have to parse it first.
+  DataExtractor lineData(getLineSection(), isLittleEndian(),
+                         cu->getAddressByteSize());
+  return Line->getOrParseLineTable(lineData, stmtOffset);
+}
+
 void DWARFContext::parseCompileUnits() {
   uint32_t offset = 0;
   const DataExtractor &debug_info_data = DataExtractor(getInfoSection(),
@@ -41,3 +113,55 @@ void DWARFContext::parseCompileUnits() {
     offset = CUs.back().getNextCompileUnitOffset();
   }
 }
+
+namespace {
+  struct OffsetComparator {
+    bool operator()(const DWARFCompileUnit &LHS,
+                    const DWARFCompileUnit &RHS) const {
+      return LHS.getOffset() < RHS.getOffset();
+    }
+    bool operator()(const DWARFCompileUnit &LHS, uint32_t RHS) const {
+      return LHS.getOffset() < RHS;
+    }
+    bool operator()(uint32_t LHS, const DWARFCompileUnit &RHS) const {
+      return LHS < RHS.getOffset();
+    }
+  };
+}
+
+DWARFCompileUnit *DWARFContext::getCompileUnitForOffset(uint32_t offset) {
+  if (CUs.empty())
+    parseCompileUnits();
+
+  DWARFCompileUnit *i = std::lower_bound(CUs.begin(), CUs.end(), offset,
+                                         OffsetComparator());
+  if (i != CUs.end())
+    return &*i;
+  return 0;
+}
+
+DILineInfo DWARFContext::getLineInfoForAddress(uint64_t address) {
+  // First, get the offset of the compile unit.
+  uint32_t cuOffset = getDebugAranges()->findAddress(address);
+  // Retrieve the compile unit.
+  DWARFCompileUnit *cu = getCompileUnitForOffset(cuOffset);
+  if (!cu)
+    return DILineInfo("<invalid>", 0, 0);
+  // Get the line table for this compile unit.
+  const DWARFDebugLine::LineTable *lineTable = getLineTableForCompileUnit(cu);
+  if (!lineTable)
+    return DILineInfo("<invalid>", 0, 0);
+  // Get the index of the row we're looking for in the line table.
+  uint64_t hiPC =
+    cu->getCompileUnitDIE()->getAttributeValueAsUnsigned(cu, DW_AT_high_pc,
+                                                         -1ULL);
+  uint32_t rowIndex = lineTable->lookupAddress(address, hiPC);
+  if (rowIndex == -1U)
+    return DILineInfo("<invalid>", 0, 0);
+
+  // From here, contruct the DILineInfo.
+  const DWARFDebugLine::Row &row = lineTable->Rows[rowIndex];
+  const std::string &fileName = lineTable->Prologue.FileNames[row.File-1].Name;
+
+  return DILineInfo(fileName.c_str(), row.Line, row.Column);
+}