[llvm] r257792 - Rename WinCodeViewLineTables to CodeViewDebug, similar to DwarfDebug
Reid Kleckner via llvm-commits
llvm-commits at lists.llvm.org
Thu Jan 14 11:25:05 PST 2016
Author: rnk
Date: Thu Jan 14 13:25:04 2016
New Revision: 257792
URL: http://llvm.org/viewvc/llvm-project?rev=257792&view=rev
Log:
Rename WinCodeViewLineTables to CodeViewDebug, similar to DwarfDebug
Soon it will be responsible for more than line tables.
Reviewers: majnemer
Differential Revision: http://reviews.llvm.org/D16199
Added:
llvm/trunk/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp
- copied, changed from r257790, llvm/trunk/lib/CodeGen/AsmPrinter/WinCodeViewLineTables.cpp
llvm/trunk/lib/CodeGen/AsmPrinter/CodeViewDebug.h
- copied, changed from r257790, llvm/trunk/lib/CodeGen/AsmPrinter/WinCodeViewLineTables.h
Removed:
llvm/trunk/lib/CodeGen/AsmPrinter/WinCodeViewLineTables.cpp
llvm/trunk/lib/CodeGen/AsmPrinter/WinCodeViewLineTables.h
Modified:
llvm/trunk/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
llvm/trunk/lib/CodeGen/AsmPrinter/CMakeLists.txt
Modified: llvm/trunk/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter/AsmPrinter.cpp?rev=257792&r1=257791&r2=257792&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/AsmPrinter/AsmPrinter.cpp (original)
+++ llvm/trunk/lib/CodeGen/AsmPrinter/AsmPrinter.cpp Thu Jan 14 13:25:04 2016
@@ -15,7 +15,7 @@
#include "DwarfDebug.h"
#include "DwarfException.h"
#include "WinException.h"
-#include "WinCodeViewLineTables.h"
+#include "CodeViewDebug.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/Analysis/ConstantFolding.h"
@@ -248,7 +248,7 @@ bool AsmPrinter::doInitialization(Module
if (MAI->doesSupportDebugInformation()) {
bool EmitCodeView = MMI->getModule()->getCodeViewFlag();
if (EmitCodeView && TM.getTargetTriple().isKnownWindowsMSVCEnvironment()) {
- Handlers.push_back(HandlerInfo(new WinCodeViewLineTables(this),
+ Handlers.push_back(HandlerInfo(new CodeViewDebug(this),
DbgTimerName,
CodeViewLineTablesGroupName));
}
Modified: llvm/trunk/lib/CodeGen/AsmPrinter/CMakeLists.txt
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter/CMakeLists.txt?rev=257792&r1=257791&r2=257792&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/AsmPrinter/CMakeLists.txt (original)
+++ llvm/trunk/lib/CodeGen/AsmPrinter/CMakeLists.txt Thu Jan 14 13:25:04 2016
@@ -20,7 +20,7 @@ add_llvm_library(LLVMAsmPrinter
ErlangGCPrinter.cpp
OcamlGCPrinter.cpp
WinException.cpp
- WinCodeViewLineTables.cpp
+ CodeViewDebug.cpp
)
add_dependencies(LLVMAsmPrinter intrinsics_gen)
Copied: llvm/trunk/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp (from r257790, llvm/trunk/lib/CodeGen/AsmPrinter/WinCodeViewLineTables.cpp)
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp?p2=llvm/trunk/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp&p1=llvm/trunk/lib/CodeGen/AsmPrinter/WinCodeViewLineTables.cpp&r1=257790&r2=257792&rev=257792&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/AsmPrinter/WinCodeViewLineTables.cpp (original)
+++ llvm/trunk/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp Thu Jan 14 13:25:04 2016
@@ -1,4 +1,4 @@
-//===-- llvm/lib/CodeGen/AsmPrinter/WinCodeViewLineTables.cpp --*- C++ -*--===//
+//===-- llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp --*- C++ -*--===//
//
// The LLVM Compiler Infrastructure
//
@@ -7,11 +7,11 @@
//
//===----------------------------------------------------------------------===//
//
-// This file contains support for writing line tables info into COFF files.
+// This file contains support for writing Microsoft CodeView debug info.
//
//===----------------------------------------------------------------------===//
-#include "WinCodeViewLineTables.h"
+#include "CodeViewDebug.h"
#include "llvm/DebugInfo/CodeView/CodeView.h"
#include "llvm/DebugInfo/CodeView/SymbolRecord.h"
#include "llvm/MC/MCExpr.h"
@@ -22,7 +22,7 @@ using namespace llvm::codeview;
namespace llvm {
-StringRef WinCodeViewLineTables::getFullFilepath(const MDNode *S) {
+StringRef CodeViewDebug::getFullFilepath(const MDNode *S) {
assert(S);
assert((isa<DICompileUnit>(S) || isa<DIFile>(S) || isa<DISubprogram>(S) ||
isa<DILexicalBlockBase>(S)) &&
@@ -81,7 +81,7 @@ StringRef WinCodeViewLineTables::getFull
return Filepath;
}
-void WinCodeViewLineTables::maybeRecordLocation(DebugLoc DL,
+void CodeViewDebug::maybeRecordLocation(DebugLoc DL,
const MachineFunction *MF) {
const MDNode *Scope = DL.getScope();
if (!Scope)
@@ -114,7 +114,7 @@ void WinCodeViewLineTables::maybeRecordL
InstrInfo[MCL] = InstrInfoTy(Filename, LineNumber, ColumnNumber);
}
-WinCodeViewLineTables::WinCodeViewLineTables(AsmPrinter *AP)
+CodeViewDebug::CodeViewDebug(AsmPrinter *AP)
: Asm(nullptr), CurFn(nullptr) {
MachineModuleInfo *MMI = AP->MMI;
@@ -129,7 +129,7 @@ WinCodeViewLineTables::WinCodeViewLineTa
Asm = AP;
}
-void WinCodeViewLineTables::endModule() {
+void CodeViewDebug::endModule() {
if (FnDebugInfo.empty())
return;
@@ -195,7 +195,7 @@ static void EmitLabelDiff(MCStreamer &St
Streamer.EmitValue(AddrDelta, Size);
}
-void WinCodeViewLineTables::emitDebugInfoForFunction(const Function *GV) {
+void CodeViewDebug::emitDebugInfoForFunction(const Function *GV) {
// For each function there is a separate subsection
// which holds the PC to file:line table.
const MCSymbol *Fn = Asm->getSymbol(GV);
@@ -347,7 +347,7 @@ void WinCodeViewLineTables::emitDebugInf
Asm->OutStreamer->EmitLabel(LineTableEnd);
}
-void WinCodeViewLineTables::beginFunction(const MachineFunction *MF) {
+void CodeViewDebug::beginFunction(const MachineFunction *MF) {
assert(!CurFn && "Can't process two functions at once!");
if (!Asm || !Asm->MMI->hasDebugInfo())
@@ -387,7 +387,7 @@ void WinCodeViewLineTables::beginFunctio
}
}
-void WinCodeViewLineTables::endFunction(const MachineFunction *MF) {
+void CodeViewDebug::endFunction(const MachineFunction *MF) {
if (!Asm || !CurFn) // We haven't created any debug info for this function.
return;
@@ -404,7 +404,7 @@ void WinCodeViewLineTables::endFunction(
CurFn = nullptr;
}
-void WinCodeViewLineTables::beginInstruction(const MachineInstr *MI) {
+void CodeViewDebug::beginInstruction(const MachineInstr *MI) {
// Ignore DBG_VALUE locations and function prologue.
if (!Asm || MI->isDebugValue() || MI->getFlag(MachineInstr::FrameSetup))
return;
Copied: llvm/trunk/lib/CodeGen/AsmPrinter/CodeViewDebug.h (from r257790, llvm/trunk/lib/CodeGen/AsmPrinter/WinCodeViewLineTables.h)
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter/CodeViewDebug.h?p2=llvm/trunk/lib/CodeGen/AsmPrinter/CodeViewDebug.h&p1=llvm/trunk/lib/CodeGen/AsmPrinter/WinCodeViewLineTables.h&r1=257790&r2=257792&rev=257792&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/AsmPrinter/WinCodeViewLineTables.h (original)
+++ llvm/trunk/lib/CodeGen/AsmPrinter/CodeViewDebug.h Thu Jan 14 13:25:04 2016
@@ -1,4 +1,4 @@
-//===-- llvm/lib/CodeGen/AsmPrinter/WinCodeViewLineTables.h ----*- C++ -*--===//
+//===-- llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.h ----*- C++ -*--===//
//
// The LLVM Compiler Infrastructure
//
@@ -7,12 +7,12 @@
//
//===----------------------------------------------------------------------===//
//
-// This file contains support for writing line tables info into COFF files.
+// This file contains support for writing Microsoft CodeView debug info.
//
//===----------------------------------------------------------------------===//
-#ifndef LLVM_LIB_CODEGEN_ASMPRINTER_WINCODEVIEWLINETABLES_H
-#define LLVM_LIB_CODEGEN_ASMPRINTER_WINCODEVIEWLINETABLES_H
+#ifndef LLVM_LIB_CODEGEN_ASMPRINTER_CODEVIEWDEBUG_H
+#define LLVM_LIB_CODEGEN_ASMPRINTER_CODEVIEWDEBUG_H
#include "AsmPrinterHandler.h"
#include "llvm/ADT/DenseMap.h"
@@ -29,7 +29,7 @@
namespace llvm {
/// \brief Collects and handles line tables information in a CodeView format.
-class LLVM_LIBRARY_VISIBILITY WinCodeViewLineTables : public AsmPrinterHandler {
+class LLVM_LIBRARY_VISIBILITY CodeViewDebug : public AsmPrinterHandler {
AsmPrinter *Asm;
DebugLoc PrevInstLoc;
@@ -114,7 +114,7 @@ class LLVM_LIBRARY_VISIBILITY WinCodeVie
void emitDebugInfoForFunction(const Function *GV);
public:
- WinCodeViewLineTables(AsmPrinter *Asm);
+ CodeViewDebug(AsmPrinter *Asm);
void setSymbolSize(const llvm::MCSymbol *, uint64_t) override {}
Removed: llvm/trunk/lib/CodeGen/AsmPrinter/WinCodeViewLineTables.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter/WinCodeViewLineTables.cpp?rev=257791&view=auto
==============================================================================
--- llvm/trunk/lib/CodeGen/AsmPrinter/WinCodeViewLineTables.cpp (original)
+++ llvm/trunk/lib/CodeGen/AsmPrinter/WinCodeViewLineTables.cpp (removed)
@@ -1,416 +0,0 @@
-//===-- llvm/lib/CodeGen/AsmPrinter/WinCodeViewLineTables.cpp --*- 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 line tables info into COFF files.
-//
-//===----------------------------------------------------------------------===//
-
-#include "WinCodeViewLineTables.h"
-#include "llvm/DebugInfo/CodeView/CodeView.h"
-#include "llvm/DebugInfo/CodeView/SymbolRecord.h"
-#include "llvm/MC/MCExpr.h"
-#include "llvm/MC/MCSymbol.h"
-#include "llvm/Support/COFF.h"
-
-using namespace llvm::codeview;
-
-namespace llvm {
-
-StringRef WinCodeViewLineTables::getFullFilepath(const MDNode *S) {
- assert(S);
- assert((isa<DICompileUnit>(S) || isa<DIFile>(S) || isa<DISubprogram>(S) ||
- isa<DILexicalBlockBase>(S)) &&
- "Unexpected scope info");
-
- auto *Scope = cast<DIScope>(S);
- StringRef Dir = Scope->getDirectory(),
- Filename = Scope->getFilename();
- std::string &Filepath =
- DirAndFilenameToFilepathMap[std::make_pair(Dir, Filename)];
- if (!Filepath.empty())
- return Filepath;
-
- // Clang emits directory and relative filename info into the IR, but CodeView
- // operates on full paths. We could change Clang to emit full paths too, but
- // that would increase the IR size and probably not needed for other users.
- // For now, just concatenate and canonicalize the path here.
- if (Filename.find(':') == 1)
- Filepath = Filename;
- else
- Filepath = (Dir + "\\" + Filename).str();
-
- // Canonicalize the path. We have to do it textually because we may no longer
- // have access the file in the filesystem.
- // First, replace all slashes with backslashes.
- std::replace(Filepath.begin(), Filepath.end(), '/', '\\');
-
- // Remove all "\.\" with "\".
- size_t Cursor = 0;
- while ((Cursor = Filepath.find("\\.\\", Cursor)) != std::string::npos)
- Filepath.erase(Cursor, 2);
-
- // Replace all "\XXX\..\" with "\". Don't try too hard though as the original
- // path should be well-formatted, e.g. start with a drive letter, etc.
- Cursor = 0;
- while ((Cursor = Filepath.find("\\..\\", Cursor)) != std::string::npos) {
- // Something's wrong if the path starts with "\..\", abort.
- if (Cursor == 0)
- break;
-
- size_t PrevSlash = Filepath.rfind('\\', Cursor - 1);
- if (PrevSlash == std::string::npos)
- // Something's wrong, abort.
- break;
-
- Filepath.erase(PrevSlash, Cursor + 3 - PrevSlash);
- // The next ".." might be following the one we've just erased.
- Cursor = PrevSlash;
- }
-
- // Remove all duplicate backslashes.
- Cursor = 0;
- while ((Cursor = Filepath.find("\\\\", Cursor)) != std::string::npos)
- Filepath.erase(Cursor, 1);
-
- return Filepath;
-}
-
-void WinCodeViewLineTables::maybeRecordLocation(DebugLoc DL,
- const MachineFunction *MF) {
- const MDNode *Scope = DL.getScope();
- if (!Scope)
- return;
- unsigned LineNumber = DL.getLine();
- // Skip this line if it is longer than the maximum we can record.
- if (LineNumber > COFF::CVL_MaxLineNumber)
- return;
-
- unsigned ColumnNumber = DL.getCol();
- // Truncate the column number if it is longer than the maximum we can record.
- if (ColumnNumber > COFF::CVL_MaxColumnNumber)
- ColumnNumber = 0;
-
- StringRef Filename = getFullFilepath(Scope);
-
- // Skip this instruction if it has the same file:line as the previous one.
- assert(CurFn);
- if (!CurFn->Instrs.empty()) {
- const InstrInfoTy &LastInstr = InstrInfo[CurFn->Instrs.back()];
- if (LastInstr.Filename == Filename && LastInstr.LineNumber == LineNumber &&
- LastInstr.ColumnNumber == ColumnNumber)
- return;
- }
- FileNameRegistry.add(Filename);
-
- MCSymbol *MCL = Asm->MMI->getContext().createTempSymbol();
- Asm->OutStreamer->EmitLabel(MCL);
- CurFn->Instrs.push_back(MCL);
- InstrInfo[MCL] = InstrInfoTy(Filename, LineNumber, ColumnNumber);
-}
-
-WinCodeViewLineTables::WinCodeViewLineTables(AsmPrinter *AP)
- : Asm(nullptr), CurFn(nullptr) {
- MachineModuleInfo *MMI = AP->MMI;
-
- // If module doesn't have named metadata anchors or COFF debug section
- // is not available, skip any debug info related stuff.
- if (!MMI->getModule()->getNamedMetadata("llvm.dbg.cu") ||
- !AP->getObjFileLowering().getCOFFDebugSymbolsSection())
- return;
-
- // Tell MMI that we have debug info.
- MMI->setDebugInfoAvailability(true);
- Asm = AP;
-}
-
-void WinCodeViewLineTables::endModule() {
- if (FnDebugInfo.empty())
- return;
-
- // FIXME: For functions that are comdat, we should emit separate .debug$S
- // sections that are comdat associative with the main function instead of
- // having one big .debug$S section.
- assert(Asm != nullptr);
- Asm->OutStreamer->SwitchSection(
- Asm->getObjFileLowering().getCOFFDebugSymbolsSection());
- Asm->EmitInt32(COFF::DEBUG_SECTION_MAGIC);
-
- // The COFF .debug$S section consists of several subsections, each starting
- // with a 4-byte control code (e.g. 0xF1, 0xF2, etc) and then a 4-byte length
- // of the payload followed by the payload itself. The subsections are 4-byte
- // aligned.
-
- // Emit per-function debug information. This code is extracted into a
- // separate function for readability.
- for (size_t I = 0, E = VisitedFunctions.size(); I != E; ++I)
- emitDebugInfoForFunction(VisitedFunctions[I]);
-
- // This subsection holds a file index to offset in string table table.
- Asm->OutStreamer->AddComment("File index to string table offset subsection");
- Asm->EmitInt32(unsigned(ModuleSubstreamKind::FileChecksums));
- size_t NumFilenames = FileNameRegistry.Infos.size();
- Asm->EmitInt32(8 * NumFilenames);
- for (size_t I = 0, E = FileNameRegistry.Filenames.size(); I != E; ++I) {
- StringRef Filename = FileNameRegistry.Filenames[I];
- // For each unique filename, just write its offset in the string table.
- Asm->EmitInt32(FileNameRegistry.Infos[Filename].StartOffset);
- // The function name offset is not followed by any additional data.
- Asm->EmitInt32(0);
- }
-
- // This subsection holds the string table.
- Asm->OutStreamer->AddComment("String table");
- Asm->EmitInt32(unsigned(ModuleSubstreamKind::StringTable));
- Asm->EmitInt32(FileNameRegistry.LastOffset);
- // The payload starts with a null character.
- Asm->EmitInt8(0);
-
- for (size_t I = 0, E = FileNameRegistry.Filenames.size(); I != E; ++I) {
- // Just emit unique filenames one by one, separated by a null character.
- Asm->OutStreamer->EmitBytes(FileNameRegistry.Filenames[I]);
- Asm->EmitInt8(0);
- }
-
- // No more subsections. Fill with zeros to align the end of the section by 4.
- Asm->OutStreamer->EmitFill((-FileNameRegistry.LastOffset) % 4, 0);
-
- clear();
-}
-
-static void EmitLabelDiff(MCStreamer &Streamer,
- const MCSymbol *From, const MCSymbol *To,
- unsigned int Size = 4) {
- MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
- MCContext &Context = Streamer.getContext();
- const MCExpr *FromRef = MCSymbolRefExpr::create(From, Variant, Context),
- *ToRef = MCSymbolRefExpr::create(To, Variant, Context);
- const MCExpr *AddrDelta =
- MCBinaryExpr::create(MCBinaryExpr::Sub, ToRef, FromRef, Context);
- Streamer.EmitValue(AddrDelta, Size);
-}
-
-void WinCodeViewLineTables::emitDebugInfoForFunction(const Function *GV) {
- // For each function there is a separate subsection
- // which holds the PC to file:line table.
- const MCSymbol *Fn = Asm->getSymbol(GV);
- assert(Fn);
-
- const FunctionInfo &FI = FnDebugInfo[GV];
- if (FI.Instrs.empty())
- return;
- assert(FI.End && "Don't know where the function ends?");
-
- StringRef FuncName;
- if (auto *SP = getDISubprogram(GV))
- FuncName = SP->getDisplayName();
-
- // If our DISubprogram name is empty, use the mangled name.
- if (FuncName.empty())
- FuncName = GlobalValue::getRealLinkageName(GV->getName());
-
- // Emit a symbol subsection, required by VS2012+ to find function boundaries.
- MCSymbol *SymbolsBegin = Asm->MMI->getContext().createTempSymbol(),
- *SymbolsEnd = Asm->MMI->getContext().createTempSymbol();
- Asm->OutStreamer->AddComment("Symbol subsection for " + Twine(FuncName));
- Asm->EmitInt32(unsigned(ModuleSubstreamKind::Symbols));
- EmitLabelDiff(*Asm->OutStreamer, SymbolsBegin, SymbolsEnd);
- Asm->OutStreamer->EmitLabel(SymbolsBegin);
- {
- MCSymbol *ProcSegmentBegin = Asm->MMI->getContext().createTempSymbol(),
- *ProcSegmentEnd = Asm->MMI->getContext().createTempSymbol();
- EmitLabelDiff(*Asm->OutStreamer, ProcSegmentBegin, ProcSegmentEnd, 2);
- Asm->OutStreamer->EmitLabel(ProcSegmentBegin);
-
- Asm->EmitInt16(unsigned(SymbolRecordKind::S_GPROC32_ID));
-
- // Some bytes of this segment don't seem to be required for basic debugging,
- // so just fill them with zeroes.
- Asm->OutStreamer->EmitFill(12, 0);
- // This is the important bit that tells the debugger where the function
- // code is located and what's its size:
- EmitLabelDiff(*Asm->OutStreamer, Fn, FI.End);
- Asm->OutStreamer->EmitFill(12, 0);
- Asm->OutStreamer->EmitCOFFSecRel32(Fn);
- Asm->OutStreamer->EmitCOFFSectionIndex(Fn);
- Asm->EmitInt8(0);
- // Emit the function display name as a null-terminated string.
- Asm->OutStreamer->EmitBytes(FuncName);
- Asm->EmitInt8(0);
- Asm->OutStreamer->EmitLabel(ProcSegmentEnd);
-
- // We're done with this function.
- Asm->EmitInt16(0x0002);
- Asm->EmitInt16(unsigned(SymbolRecordKind::S_PROC_ID_END));
- }
- Asm->OutStreamer->EmitLabel(SymbolsEnd);
- // Every subsection must be aligned to a 4-byte boundary.
- Asm->OutStreamer->EmitFill((-FuncName.size()) % 4, 0);
-
- // PCs/Instructions are grouped into segments sharing the same filename.
- // Pre-calculate the lengths (in instructions) of these segments and store
- // them in a map for convenience. Each index in the map is the sequential
- // number of the respective instruction that starts a new segment.
- DenseMap<size_t, size_t> FilenameSegmentLengths;
- size_t LastSegmentEnd = 0;
- StringRef PrevFilename = InstrInfo[FI.Instrs[0]].Filename;
- for (size_t J = 1, F = FI.Instrs.size(); J != F; ++J) {
- if (PrevFilename == InstrInfo[FI.Instrs[J]].Filename)
- continue;
- FilenameSegmentLengths[LastSegmentEnd] = J - LastSegmentEnd;
- LastSegmentEnd = J;
- PrevFilename = InstrInfo[FI.Instrs[J]].Filename;
- }
- FilenameSegmentLengths[LastSegmentEnd] = FI.Instrs.size() - LastSegmentEnd;
-
- // Emit a line table subsection, required to do PC-to-file:line lookup.
- Asm->OutStreamer->AddComment("Line table subsection for " + Twine(FuncName));
- Asm->EmitInt32(unsigned(ModuleSubstreamKind::Lines));
- MCSymbol *LineTableBegin = Asm->MMI->getContext().createTempSymbol(),
- *LineTableEnd = Asm->MMI->getContext().createTempSymbol();
- EmitLabelDiff(*Asm->OutStreamer, LineTableBegin, LineTableEnd);
- Asm->OutStreamer->EmitLabel(LineTableBegin);
-
- // Identify the function this subsection is for.
- Asm->OutStreamer->EmitCOFFSecRel32(Fn);
- Asm->OutStreamer->EmitCOFFSectionIndex(Fn);
- // Insert flags after a 16-bit section index.
- Asm->EmitInt16(COFF::DEBUG_LINE_TABLES_HAVE_COLUMN_RECORDS);
-
- // Length of the function's code, in bytes.
- EmitLabelDiff(*Asm->OutStreamer, Fn, FI.End);
-
- // PC-to-linenumber lookup table:
- MCSymbol *FileSegmentEnd = nullptr;
-
- // The start of the last segment:
- size_t LastSegmentStart = 0;
-
- auto FinishPreviousChunk = [&] {
- if (!FileSegmentEnd)
- return;
- for (size_t ColSegI = LastSegmentStart,
- ColSegEnd = ColSegI + FilenameSegmentLengths[LastSegmentStart];
- ColSegI != ColSegEnd; ++ColSegI) {
- unsigned ColumnNumber = InstrInfo[FI.Instrs[ColSegI]].ColumnNumber;
- assert(ColumnNumber <= COFF::CVL_MaxColumnNumber);
- Asm->EmitInt16(ColumnNumber); // Start column
- Asm->EmitInt16(0); // End column
- }
- Asm->OutStreamer->EmitLabel(FileSegmentEnd);
- };
-
- for (size_t J = 0, F = FI.Instrs.size(); J != F; ++J) {
- MCSymbol *Instr = FI.Instrs[J];
- assert(InstrInfo.count(Instr));
-
- if (FilenameSegmentLengths.count(J)) {
- // We came to a beginning of a new filename segment.
- FinishPreviousChunk();
- StringRef CurFilename = InstrInfo[FI.Instrs[J]].Filename;
- assert(FileNameRegistry.Infos.count(CurFilename));
- size_t IndexInStringTable =
- FileNameRegistry.Infos[CurFilename].FilenameID;
- // Each segment starts with the offset of the filename
- // in the string table.
- Asm->OutStreamer->AddComment(
- "Segment for file '" + Twine(CurFilename) + "' begins");
- MCSymbol *FileSegmentBegin = Asm->MMI->getContext().createTempSymbol();
- Asm->OutStreamer->EmitLabel(FileSegmentBegin);
- Asm->EmitInt32(8 * IndexInStringTable);
-
- // Number of PC records in the lookup table.
- size_t SegmentLength = FilenameSegmentLengths[J];
- Asm->EmitInt32(SegmentLength);
-
- // Full size of the segment for this filename, including the prev two
- // records.
- FileSegmentEnd = Asm->MMI->getContext().createTempSymbol();
- EmitLabelDiff(*Asm->OutStreamer, FileSegmentBegin, FileSegmentEnd);
- LastSegmentStart = J;
- }
-
- // The first PC with the given linenumber and the linenumber itself.
- EmitLabelDiff(*Asm->OutStreamer, Fn, Instr);
- uint32_t LineNumber = InstrInfo[Instr].LineNumber;
- assert(LineNumber <= COFF::CVL_MaxLineNumber);
- uint32_t LineData = LineNumber | COFF::CVL_IsStatement;
- Asm->EmitInt32(LineData);
- }
-
- FinishPreviousChunk();
- Asm->OutStreamer->EmitLabel(LineTableEnd);
-}
-
-void WinCodeViewLineTables::beginFunction(const MachineFunction *MF) {
- assert(!CurFn && "Can't process two functions at once!");
-
- if (!Asm || !Asm->MMI->hasDebugInfo())
- return;
-
- const Function *GV = MF->getFunction();
- assert(FnDebugInfo.count(GV) == false);
- VisitedFunctions.push_back(GV);
- CurFn = &FnDebugInfo[GV];
-
- // Find the end of the function prolog.
- // FIXME: is there a simpler a way to do this? Can we just search
- // for the first instruction of the function, not the last of the prolog?
- DebugLoc PrologEndLoc;
- bool EmptyPrologue = true;
- for (const auto &MBB : *MF) {
- if (PrologEndLoc)
- break;
- for (const auto &MI : MBB) {
- if (MI.isDebugValue())
- continue;
-
- // First known non-DBG_VALUE and non-frame setup location marks
- // the beginning of the function body.
- // FIXME: do we need the first subcondition?
- if (!MI.getFlag(MachineInstr::FrameSetup) && MI.getDebugLoc()) {
- PrologEndLoc = MI.getDebugLoc();
- break;
- }
- EmptyPrologue = false;
- }
- }
- // Record beginning of function if we have a non-empty prologue.
- if (PrologEndLoc && !EmptyPrologue) {
- DebugLoc FnStartDL = PrologEndLoc.getFnDebugLoc();
- maybeRecordLocation(FnStartDL, MF);
- }
-}
-
-void WinCodeViewLineTables::endFunction(const MachineFunction *MF) {
- if (!Asm || !CurFn) // We haven't created any debug info for this function.
- return;
-
- const Function *GV = MF->getFunction();
- assert(FnDebugInfo.count(GV));
- assert(CurFn == &FnDebugInfo[GV]);
-
- if (CurFn->Instrs.empty()) {
- FnDebugInfo.erase(GV);
- VisitedFunctions.pop_back();
- } else {
- CurFn->End = Asm->getFunctionEnd();
- }
- CurFn = nullptr;
-}
-
-void WinCodeViewLineTables::beginInstruction(const MachineInstr *MI) {
- // Ignore DBG_VALUE locations and function prologue.
- if (!Asm || MI->isDebugValue() || MI->getFlag(MachineInstr::FrameSetup))
- return;
- DebugLoc DL = MI->getDebugLoc();
- if (DL == PrevInstLoc || !DL)
- return;
- maybeRecordLocation(DL, Asm->MF);
-}
-}
Removed: llvm/trunk/lib/CodeGen/AsmPrinter/WinCodeViewLineTables.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter/WinCodeViewLineTables.h?rev=257791&view=auto
==============================================================================
--- llvm/trunk/lib/CodeGen/AsmPrinter/WinCodeViewLineTables.h (original)
+++ llvm/trunk/lib/CodeGen/AsmPrinter/WinCodeViewLineTables.h (removed)
@@ -1,138 +0,0 @@
-//===-- llvm/lib/CodeGen/AsmPrinter/WinCodeViewLineTables.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 line tables info into COFF files.
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_LIB_CODEGEN_ASMPRINTER_WINCODEVIEWLINETABLES_H
-#define LLVM_LIB_CODEGEN_ASMPRINTER_WINCODEVIEWLINETABLES_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/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 WinCodeViewLineTables : public AsmPrinterHandler {
- AsmPrinter *Asm;
- DebugLoc PrevInstLoc;
-
- // For each function, store a vector of labels to its instructions, as well as
- // to the end of the function.
- struct FunctionInfo {
- SmallVector<MCSymbol *, 10> Instrs;
- MCSymbol *End;
- FunctionInfo() : End(nullptr) {}
- } *CurFn;
-
- typedef DenseMap<const Function *, FunctionInfo> FnDebugInfoTy;
- FnDebugInfoTy FnDebugInfo;
- // Store the functions we've visited in a vector so we can maintain a stable
- // order while emitting subsections.
- SmallVector<const Function *, 10> VisitedFunctions;
-
- // InstrInfoTy - Holds the Filename:LineNumber information for every
- // instruction with a unique debug location.
- struct InstrInfoTy {
- StringRef Filename;
- unsigned LineNumber;
- unsigned ColumnNumber;
-
- InstrInfoTy() : LineNumber(0), ColumnNumber(0) {}
-
- InstrInfoTy(StringRef Filename, unsigned LineNumber, unsigned ColumnNumber)
- : Filename(Filename), LineNumber(LineNumber),
- ColumnNumber(ColumnNumber) {}
- };
- DenseMap<MCSymbol *, InstrInfoTy> InstrInfo;
-
- // FileNameRegistry - Manages filenames observed while generating debug info
- // by filtering out duplicates and bookkeeping the offsets in the string
- // table to be generated.
- struct FileNameRegistryTy {
- SmallVector<StringRef, 10> Filenames;
- struct PerFileInfo {
- size_t FilenameID, StartOffset;
- };
- StringMap<PerFileInfo> Infos;
-
- // The offset in the string table where we'll write the next unique
- // filename.
- size_t LastOffset;
-
- FileNameRegistryTy() {
- clear();
- }
-
- // Add Filename to the registry, if it was not observed before.
- void add(StringRef Filename) {
- if (Infos.count(Filename))
- return;
- size_t OldSize = Infos.size();
- Infos[Filename].FilenameID = OldSize;
- Infos[Filename].StartOffset = LastOffset;
- LastOffset += Filename.size() + 1;
- Filenames.push_back(Filename);
- }
-
- void clear() {
- LastOffset = 1;
- Infos.clear();
- Filenames.clear();
- }
- } FileNameRegistry;
-
- typedef std::map<std::pair<StringRef, StringRef>, std::string>
- DirAndFilenameToFilepathMapTy;
- DirAndFilenameToFilepathMapTy DirAndFilenameToFilepathMap;
- StringRef getFullFilepath(const MDNode *S);
-
- void maybeRecordLocation(DebugLoc DL, const MachineFunction *MF);
-
- void clear() {
- assert(CurFn == nullptr);
- FileNameRegistry.clear();
- InstrInfo.clear();
- }
-
- void emitDebugInfoForFunction(const Function *GV);
-
-public:
- WinCodeViewLineTables(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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