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//===-- llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.h ----*- C++ -*--===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains support for writing Microsoft CodeView debug info.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_CODEGEN_ASMPRINTER_CODEVIEWDEBUG_H
#define LLVM_LIB_CODEGEN_ASMPRINTER_CODEVIEWDEBUG_H
#include "AsmPrinterHandler.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/CodeGen/AsmPrinter.h"
#include "llvm/CodeGen/LexicalScopes.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/DebugInfo/CodeView/TypeIndex.h"
#include "llvm/IR/DebugInfo.h"
#include "llvm/IR/DebugLoc.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/Target/TargetLoweringObjectFile.h"
namespace llvm {
/// \brief Collects and handles line tables information in a CodeView format.
class LLVM_LIBRARY_VISIBILITY CodeViewDebug : public AsmPrinterHandler {
AsmPrinter *Asm;
DebugLoc PrevInstLoc;
struct InlineSite {
TinyPtrVector<const DILocation *> ChildSites;
const DISubprogram *Inlinee = nullptr;
unsigned SiteFuncId = 0;
};
// For each function, store a vector of labels to its instructions, as well as
// to the end of the function.
struct FunctionInfo {
/// Map from inlined call site to inlined instructions and child inlined
/// call sites. Listed in program order.
MapVector<const DILocation *, InlineSite> InlineSites;
DebugLoc LastLoc;
const MCSymbol *Begin = nullptr;
const MCSymbol *End = nullptr;
unsigned FuncId = 0;
unsigned LastFileId = 0;
bool HaveLineInfo = false;
};
FunctionInfo *CurFn;
unsigned NextFuncId = 0;
InlineSite &getInlineSite(const DILocation *Loc);
static void collectInlineSiteChildren(SmallVectorImpl<unsigned> &Children,
const FunctionInfo &FI,
const InlineSite &Site);
/// Remember some debug info about each function. Keep it in a stable order to
/// emit at the end of the TU.
MapVector<const Function *, FunctionInfo> FnDebugInfo;
/// Map from DIFile to .cv_file id.
DenseMap<const DIFile *, unsigned> FileIdMap;
SmallSetVector<const DISubprogram *, 4> InlinedSubprograms;
DenseMap<const DISubprogram *, codeview::TypeIndex> SubprogramToFuncId;
unsigned TypeCount = 0;
/// Gets the next type index and increments the count of types streamed so
/// far.
codeview::TypeIndex getNextTypeIndex() {
return codeview::TypeIndex(codeview::TypeIndex::FirstNonSimpleIndex + TypeCount++);
}
typedef std::map<const DIFile *, std::string> FileToFilepathMapTy;
FileToFilepathMapTy FileToFilepathMap;
StringRef getFullFilepath(const DIFile *S);
unsigned maybeRecordFile(const DIFile *F);
void maybeRecordLocation(DebugLoc DL, const MachineFunction *MF);
void clear() {
assert(CurFn == nullptr);
FileIdMap.clear();
FnDebugInfo.clear();
FileToFilepathMap.clear();
}
void emitTypeInformation();
void emitInlineeLinesSubsection();
void emitDebugInfoForFunction(const Function *GV, FunctionInfo &FI);
void emitInlinedCallSite(const FunctionInfo &FI, const DILocation *InlinedAt,
const InlineSite &Site);
public:
CodeViewDebug(AsmPrinter *Asm);
void setSymbolSize(const llvm::MCSymbol *, uint64_t) override {}
/// \brief Emit the COFF section that holds the line table information.
void endModule() override;
/// \brief Gather pre-function debug information.
void beginFunction(const MachineFunction *MF) override;
/// \brief Gather post-function debug information.
void endFunction(const MachineFunction *) override;
/// \brief Process beginning of an instruction.
void beginInstruction(const MachineInstr *MI) override;
/// \brief Process end of an instruction.
void endInstruction() override {}
};
} // End of namespace llvm
#endif
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