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[Dsymutil][Debuginfo][NFC] #3 Refactor dsymutil to separate DWARF optimizing part.
Summary: This is the next portion of patches for dsymutil. Create DwarfEmitter interface to generate all debug info tables. Put DwarfEmitter into DwarfLinker library and make tools/dsymutil/DwarfStreamer to be child of DwarfEmitter. It passes check-all testing. MD5 checksum for clang .dSYM bundle matches for the dsymutil with/without that patch. Reviewers: JDevlieghere, friss, dblaikie, aprantl Reviewed By: JDevlieghere Subscribers: merge_guards_bot, hiraditya, thegameg, probinson, llvm-commits Tags: #llvm, #debug-info Differential Revision: https://reviews.llvm.org/D72476
This commit is contained in:
Alexey Lapshin
parent
474f1e7bdb
commit
86dc8990a6
@ -9,10 +9,12 @@
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#ifndef LLVM_DWARFLINKER_DWARFLINKER_H
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#define LLVM_DWARFLINKER_DWARFLINKER_H
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#include "llvm/CodeGen/AccelTable.h"
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#include "llvm/CodeGen/NonRelocatableStringpool.h"
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#include "llvm/DWARFLinker/DWARFLinkerDeclContext.h"
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#include "llvm/DebugInfo/DWARF/DWARFCompileUnit.h"
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#include "llvm/DebugInfo/DWARF/DWARFContext.h"
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#include "llvm/MC/MCDwarf.h"
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#include <map>
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namespace llvm {
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@ -81,6 +83,116 @@ public:
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virtual void clear() = 0;
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};
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/// DwarfEmitter presents interface to generate all debug info tables.
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class DwarfEmitter {
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public:
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virtual ~DwarfEmitter();
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/// Emit DIE containing warnings.
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virtual void emitPaperTrailWarningsDie(const Triple &Triple, DIE &Die) = 0;
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/// Emit section named SecName with content equals to
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/// corresponding section in Obj.
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virtual void emitSectionContents(const object::ObjectFile &Obj,
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StringRef SecName) = 0;
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/// Emit the abbreviation table \p Abbrevs to the debug_abbrev section.
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virtual void
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emitAbbrevs(const std::vector<std::unique_ptr<DIEAbbrev>> &Abbrevs,
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unsigned DwarfVersion) = 0;
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/// Emit the string table described by \p Pool.
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virtual void emitStrings(const NonRelocatableStringpool &Pool) = 0;
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/// Emit DWARF debug names.
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virtual void
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emitDebugNames(AccelTable<DWARF5AccelTableStaticData> &Table) = 0;
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/// Emit Apple namespaces accelerator table.
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virtual void
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emitAppleNamespaces(AccelTable<AppleAccelTableStaticOffsetData> &Table) = 0;
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/// Emit Apple names accelerator table.
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virtual void
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emitAppleNames(AccelTable<AppleAccelTableStaticOffsetData> &Table) = 0;
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/// Emit Apple Objective-C accelerator table.
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virtual void
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emitAppleObjc(AccelTable<AppleAccelTableStaticOffsetData> &Table) = 0;
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/// Emit Apple type accelerator table.
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virtual void
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emitAppleTypes(AccelTable<AppleAccelTableStaticTypeData> &Table) = 0;
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/// Emit debug_ranges for \p FuncRange by translating the
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/// original \p Entries.
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virtual void emitRangesEntries(
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int64_t UnitPcOffset, uint64_t OrigLowPc,
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const FunctionIntervals::const_iterator &FuncRange,
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const std::vector<DWARFDebugRangeList::RangeListEntry> &Entries,
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unsigned AddressSize) = 0;
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/// Emit debug_aranges entries for \p Unit and if \p DoRangesSection is true,
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/// also emit the debug_ranges entries for the DW_TAG_compile_unit's
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/// DW_AT_ranges attribute.
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virtual void emitUnitRangesEntries(CompileUnit &Unit,
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bool DoRangesSection) = 0;
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/// Copy the debug_line over to the updated binary while unobfuscating the
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/// file names and directories.
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virtual void translateLineTable(DataExtractor LineData, uint64_t Offset) = 0;
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/// Emit the line table described in \p Rows into the debug_line section.
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virtual void emitLineTableForUnit(MCDwarfLineTableParams Params,
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StringRef PrologueBytes,
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unsigned MinInstLength,
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std::vector<DWARFDebugLine::Row> &Rows,
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unsigned AdddressSize) = 0;
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/// Emit the .debug_pubnames contribution for \p Unit.
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virtual void emitPubNamesForUnit(const CompileUnit &Unit) = 0;
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/// Emit the .debug_pubtypes contribution for \p Unit.
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virtual void emitPubTypesForUnit(const CompileUnit &Unit) = 0;
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/// Emit a CIE.
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virtual void emitCIE(StringRef CIEBytes) = 0;
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/// Emit an FDE with data \p Bytes.
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virtual void emitFDE(uint32_t CIEOffset, uint32_t AddreSize, uint32_t Address,
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StringRef Bytes) = 0;
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/// Emit the debug_loc contribution for \p Unit by copying the entries from
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/// \p Dwarf and offsetting them. Update the location attributes to point to
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/// the new entries.
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virtual void emitLocationsForUnit(
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const CompileUnit &Unit, DWARFContext &Dwarf,
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std::function<void(StringRef, SmallVectorImpl<uint8_t> &)>
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ProcessExpr) = 0;
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/// Emit the compilation unit header for \p Unit in the
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/// debug_info section.
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///
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/// As a side effect, this also switches the current Dwarf version
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/// of the MC layer to the one of U.getOrigUnit().
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virtual void emitCompileUnitHeader(CompileUnit &Unit) = 0;
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/// Recursively emit the DIE tree rooted at \p Die.
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virtual void emitDIE(DIE &Die) = 0;
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/// Returns size of generated .debug_line section.
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virtual uint64_t getLineSectionSize() const = 0;
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/// Returns size of generated .debug_frame section.
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virtual uint64_t getFrameSectionSize() const = 0;
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/// Returns size of generated .debug_ranges section.
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virtual uint64_t getRangesSectionSize() const = 0;
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/// Returns size of generated .debug_info section.
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virtual uint64_t getDebugInfoSectionSize() const = 0;
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};
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} // end namespace llvm
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#endif // LLVM_DWARFLINKER_DWARFLINKER_H
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@ -12,4 +12,6 @@ namespace llvm {
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AddressesMap::~AddressesMap() {}
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DwarfEmitter::~DwarfEmitter() {}
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} // namespace llvm
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@ -2464,11 +2464,12 @@ void DwarfLinkerForBinary::DIECloner::cloneAllCompileUnits(
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if (!Linker.Streamer)
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return;
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uint64_t OutputDebugInfoSize = Linker.Streamer->getDebugInfoSectionSize();
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for (auto &CurrentUnit : CompileUnits) {
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auto InputDIE = CurrentUnit->getOrigUnit().getUnitDIE();
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CurrentUnit->setStartOffset(Linker.OutputDebugInfoSize);
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CurrentUnit->setStartOffset(OutputDebugInfoSize);
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if (!InputDIE) {
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Linker.OutputDebugInfoSize = CurrentUnit->computeNextUnitOffset();
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OutputDebugInfoSize = CurrentUnit->computeNextUnitOffset();
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continue;
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}
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if (CurrentUnit->getInfo(0).Keep) {
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@ -2480,7 +2481,7 @@ void DwarfLinkerForBinary::DIECloner::cloneAllCompileUnits(
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CurrentUnit->getOutputUnitDIE());
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}
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Linker.OutputDebugInfoSize = CurrentUnit->computeNextUnitOffset();
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OutputDebugInfoSize = CurrentUnit->computeNextUnitOffset();
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if (Linker.Options.NoOutput)
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continue;
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@ -2522,8 +2523,12 @@ void DwarfLinkerForBinary::DIECloner::cloneAllCompileUnits(
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if (!CurrentUnit->getOutputUnitDIE())
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continue;
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assert(Linker.Streamer->getDebugInfoSectionSize() ==
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CurrentUnit->getStartOffset());
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Linker.Streamer->emitCompileUnitHeader(*CurrentUnit);
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Linker.Streamer->emitDIE(*CurrentUnit->getOutputUnitDIE());
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assert(Linker.Streamer->getDebugInfoSectionSize() ==
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CurrentUnit->computeNextUnitOffset());
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}
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}
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@ -2593,13 +2598,7 @@ bool DwarfLinkerForBinary::emitPaperTrailWarnings(
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Size += getULEB128Size(Abbrev.getNumber());
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}
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CUDie->setSize(Size);
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auto &Asm = Streamer->getAsmPrinter();
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Asm.emitInt32(11 + CUDie->getSize() - 4);
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Asm.emitInt16(2);
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Asm.emitInt32(0);
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Asm.emitInt8(Map.getTriple().isArch64Bit() ? 8 : 4);
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Streamer->emitDIE(*CUDie);
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OutputDebugInfoSize += 11 /* Header */ + Size;
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Streamer->emitPaperTrailWarningsDie(Map.getTriple(), *CUDie);
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return true;
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}
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@ -2680,7 +2679,6 @@ bool DwarfLinkerForBinary::link(const DebugMap &Map) {
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return false;
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// Size of the DIEs (and headers) generated for the linked output.
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OutputDebugInfoSize = 0;
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// A unique ID that identifies each compile unit.
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unsigned UnitID = 0;
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DebugMap ModuleMap(Map.getTriple(), Map.getBinaryPath());
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@ -2819,7 +2817,8 @@ bool DwarfLinkerForBinary::link(const DebugMap &Map) {
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// is already emitted, without being affected by canonical die offsets set
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// later. This prevents undeterminism when analyze and clone execute
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// concurrently, as clone set the canonical DIE offset and analyze reads it.
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const uint64_t ModulesEndOffset = OutputDebugInfoSize;
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const uint64_t ModulesEndOffset =
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Options.NoOutput ? 0 : Streamer->getDebugInfoSectionSize();
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// These variables manage the list of processed object files.
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// The mutex and condition variable are to ensure that this is thread safe.
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@ -499,7 +499,6 @@ private:
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BinaryHolder &BinHolder;
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LinkOptions Options;
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std::unique_ptr<DwarfStreamer> Streamer;
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uint64_t OutputDebugInfoSize;
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unsigned MaxDwarfVersion = 0;
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unsigned MinDwarfVersion = std::numeric_limits<unsigned>::max();
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@ -123,6 +123,7 @@ bool DwarfStreamer::init(Triple TheTriple) {
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LocSectionSize = 0;
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LineSectionSize = 0;
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FrameSectionSize = 0;
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DebugInfoSectionSize = 0;
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return true;
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}
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@ -169,6 +170,7 @@ void DwarfStreamer::emitCompileUnitHeader(CompileUnit &Unit) {
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// start of the section.
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Asm->emitInt32(0);
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Asm->emitInt8(Unit.getOrigUnit().getAddressByteSize());
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DebugInfoSectionSize += 11;
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// Remember this CU.
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EmittedUnits.push_back({Unit.getUniqueID(), Unit.getLabelBegin()});
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@ -188,6 +190,45 @@ void DwarfStreamer::emitAbbrevs(
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void DwarfStreamer::emitDIE(DIE &Die) {
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MS->SwitchSection(MOFI->getDwarfInfoSection());
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Asm->emitDwarfDIE(Die);
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DebugInfoSectionSize += Die.getSize();
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}
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/// Emit contents of section SecName From Obj.
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void DwarfStreamer::emitSectionContents(const object::ObjectFile &Obj,
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StringRef SecName) {
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MCSection *Section =
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StringSwitch<MCSection *>(SecName)
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.Case("debug_line", MC->getObjectFileInfo()->getDwarfLineSection())
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.Case("debug_loc", MC->getObjectFileInfo()->getDwarfLocSection())
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.Case("debug_ranges",
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MC->getObjectFileInfo()->getDwarfRangesSection())
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.Case("debug_frame", MC->getObjectFileInfo()->getDwarfFrameSection())
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.Case("debug_aranges",
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MC->getObjectFileInfo()->getDwarfARangesSection())
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.Default(nullptr);
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if (Section) {
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MS->SwitchSection(Section);
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if (auto Sec = getSectionByName(Obj, SecName)) {
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if (Expected<StringRef> E = Sec->getContents())
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MS->EmitBytes(*E);
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else
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consumeError(E.takeError());
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}
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}
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}
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/// Emit DIE containing warnings.
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void DwarfStreamer::emitPaperTrailWarningsDie(const Triple &Triple, DIE &Die) {
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switchToDebugInfoSection(/* Version */ 2);
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auto &Asm = getAsmPrinter();
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Asm.emitInt32(11 + Die.getSize() - 4);
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Asm.emitInt16(2);
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Asm.emitInt32(0);
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Asm.emitInt8(Triple.isArch64Bit() ? 8 : 4);
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DebugInfoSectionSize += 11;
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emitDIE(Die);
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}
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/// Emit the debug_str section stored in \p Pool.
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@ -680,33 +721,23 @@ void DwarfStreamer::translateLineTable(DataExtractor Data, uint64_t Offset) {
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Offset = UnitEnd;
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}
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static void emitSectionContents(const object::ObjectFile &Obj,
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StringRef SecName, MCStreamer *MS) {
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if (auto Sec = getSectionByName(Obj, SecName)) {
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if (Expected<StringRef> E = Sec->getContents())
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MS->EmitBytes(*E);
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else
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consumeError(E.takeError());
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}
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}
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void DwarfStreamer::copyInvariantDebugSection(const object::ObjectFile &Obj) {
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if (!Options.Translator) {
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MS->SwitchSection(MC->getObjectFileInfo()->getDwarfLineSection());
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emitSectionContents(Obj, "debug_line", MS);
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emitSectionContents(Obj, "debug_line");
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}
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MS->SwitchSection(MC->getObjectFileInfo()->getDwarfLocSection());
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emitSectionContents(Obj, "debug_loc", MS);
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emitSectionContents(Obj, "debug_loc");
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MS->SwitchSection(MC->getObjectFileInfo()->getDwarfRangesSection());
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emitSectionContents(Obj, "debug_ranges", MS);
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emitSectionContents(Obj, "debug_ranges");
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MS->SwitchSection(MC->getObjectFileInfo()->getDwarfFrameSection());
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emitSectionContents(Obj, "debug_frame", MS);
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emitSectionContents(Obj, "debug_frame");
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MS->SwitchSection(MC->getObjectFileInfo()->getDwarfARangesSection());
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emitSectionContents(Obj, "debug_aranges", MS);
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emitSectionContents(Obj, "debug_aranges");
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}
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/// Emit the pubnames or pubtypes section contribution for \p
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@ -14,6 +14,7 @@
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#include "llvm/CodeGen/AccelTable.h"
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#include "llvm/CodeGen/AsmPrinter.h"
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#include "llvm/CodeGen/NonRelocatableStringpool.h"
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#include "llvm/DWARFLinker/DWARFLinker.h"
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#include "llvm/DWARFLinker/DWARFLinkerCompileUnit.h"
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#include "llvm/DebugInfo/DWARF/DWARFDebugLine.h"
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#include "llvm/DebugInfo/DWARF/DWARFDebugRangeList.h"
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@ -41,7 +42,7 @@ namespace dsymutil {
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///
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/// All interactions with the MC layer that is used to build the debug
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/// information binary representation are handled in this class.
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class DwarfStreamer {
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class DwarfStreamer : public DwarfEmitter {
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public:
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DwarfStreamer(raw_fd_ostream &OutFile, LinkOptions Options)
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: OutFile(OutFile), Options(std::move(Options)) {}
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@ -62,17 +63,24 @@ public:
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///
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/// As a side effect, this also switches the current Dwarf version
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/// of the MC layer to the one of U.getOrigUnit().
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void emitCompileUnitHeader(CompileUnit &Unit);
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void emitCompileUnitHeader(CompileUnit &Unit) override;
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/// Recursively emit the DIE tree rooted at \p Die.
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void emitDIE(DIE &Die);
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void emitDIE(DIE &Die) override;
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/// Emit the abbreviation table \p Abbrevs to the debug_abbrev section.
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void emitAbbrevs(const std::vector<std::unique_ptr<DIEAbbrev>> &Abbrevs,
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unsigned DwarfVersion);
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unsigned DwarfVersion) override;
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/// Emit DIE containing warnings.
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void emitPaperTrailWarningsDie(const Triple &Triple, DIE &Die) override;
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/// Emit contents of section SecName From Obj.
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void emitSectionContents(const object::ObjectFile &Obj,
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StringRef SecName) override;
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/// Emit the string table described by \p Pool.
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void emitStrings(const NonRelocatableStringpool &Pool);
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void emitStrings(const NonRelocatableStringpool &Pool) override;
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/// Emit the swift_ast section stored in \p Buffer.
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void emitSwiftAST(StringRef Buffer);
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@ -83,66 +91,75 @@ public:
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int64_t UnitPcOffset, uint64_t OrigLowPc,
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const FunctionIntervals::const_iterator &FuncRange,
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const std::vector<DWARFDebugRangeList::RangeListEntry> &Entries,
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unsigned AddressSize);
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unsigned AddressSize) override;
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/// Emit debug_aranges entries for \p Unit and if \p DoRangesSection is true,
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/// also emit the debug_ranges entries for the DW_TAG_compile_unit's
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/// DW_AT_ranges attribute.
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void emitUnitRangesEntries(CompileUnit &Unit, bool DoRangesSection);
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void emitUnitRangesEntries(CompileUnit &Unit, bool DoRangesSection) override;
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uint32_t getRangesSectionSize() const { return RangesSectionSize; }
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uint64_t getRangesSectionSize() const override { return RangesSectionSize; }
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/// Emit the debug_loc contribution for \p Unit by copying the entries from
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/// \p Dwarf and offsetting them. Update the location attributes to point to
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/// the new entries.
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void emitLocationsForUnit(
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const CompileUnit &Unit, DWARFContext &Dwarf,
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std::function<void(StringRef, SmallVectorImpl<uint8_t> &)> ProcessExpr);
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std::function<void(StringRef, SmallVectorImpl<uint8_t> &)> ProcessExpr)
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override;
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/// Emit the line table described in \p Rows into the debug_line section.
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void emitLineTableForUnit(MCDwarfLineTableParams Params,
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StringRef PrologueBytes, unsigned MinInstLength,
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std::vector<DWARFDebugLine::Row> &Rows,
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unsigned AdddressSize);
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unsigned AdddressSize) override;
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/// Copy the debug_line over to the updated binary while unobfuscating the
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/// file names and directories.
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void translateLineTable(DataExtractor LineData, uint64_t Offset);
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void translateLineTable(DataExtractor LineData, uint64_t Offset) override;
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/// Copy over the debug sections that are not modified when updating.
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void copyInvariantDebugSection(const object::ObjectFile &Obj);
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uint64_t getLineSectionSize() const { return LineSectionSize; }
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uint64_t getLineSectionSize() const override { return LineSectionSize; }
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/// Emit the .debug_pubnames contribution for \p Unit.
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void emitPubNamesForUnit(const CompileUnit &Unit);
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void emitPubNamesForUnit(const CompileUnit &Unit) override;
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/// Emit the .debug_pubtypes contribution for \p Unit.
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void emitPubTypesForUnit(const CompileUnit &Unit);
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void emitPubTypesForUnit(const CompileUnit &Unit) override;
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/// Emit a CIE.
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void emitCIE(StringRef CIEBytes);
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void emitCIE(StringRef CIEBytes) override;
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||||
|
||||
/// Emit an FDE with data \p Bytes.
|
||||
void emitFDE(uint32_t CIEOffset, uint32_t AddreSize, uint32_t Address,
|
||||
StringRef Bytes);
|
||||
StringRef Bytes) override;
|
||||
|
||||
/// Emit DWARF debug names.
|
||||
void emitDebugNames(AccelTable<DWARF5AccelTableStaticData> &Table);
|
||||
void emitDebugNames(AccelTable<DWARF5AccelTableStaticData> &Table) override;
|
||||
|
||||
/// Emit Apple namespaces accelerator table.
|
||||
void emitAppleNamespaces(AccelTable<AppleAccelTableStaticOffsetData> &Table);
|
||||
void emitAppleNamespaces(
|
||||
AccelTable<AppleAccelTableStaticOffsetData> &Table) override;
|
||||
|
||||
/// Emit Apple names accelerator table.
|
||||
void emitAppleNames(AccelTable<AppleAccelTableStaticOffsetData> &Table);
|
||||
void
|
||||
emitAppleNames(AccelTable<AppleAccelTableStaticOffsetData> &Table) override;
|
||||
|
||||
/// Emit Apple Objective-C accelerator table.
|
||||
void emitAppleObjc(AccelTable<AppleAccelTableStaticOffsetData> &Table);
|
||||
void
|
||||
emitAppleObjc(AccelTable<AppleAccelTableStaticOffsetData> &Table) override;
|
||||
|
||||
/// Emit Apple type accelerator table.
|
||||
void emitAppleTypes(AccelTable<AppleAccelTableStaticTypeData> &Table);
|
||||
void
|
||||
emitAppleTypes(AccelTable<AppleAccelTableStaticTypeData> &Table) override;
|
||||
|
||||
uint32_t getFrameSectionSize() const { return FrameSectionSize; }
|
||||
uint64_t getFrameSectionSize() const override { return FrameSectionSize; }
|
||||
|
||||
uint64_t getDebugInfoSectionSize() const override {
|
||||
return DebugInfoSectionSize;
|
||||
}
|
||||
|
||||
private:
|
||||
/// \defgroup MCObjects MC layer objects constructed by the streamer
|
||||
@ -166,10 +183,11 @@ private:
|
||||
|
||||
LinkOptions Options;
|
||||
|
||||
uint32_t RangesSectionSize;
|
||||
uint32_t LocSectionSize;
|
||||
uint64_t LineSectionSize;
|
||||
uint32_t FrameSectionSize;
|
||||
uint64_t RangesSectionSize = 0;
|
||||
uint64_t LocSectionSize = 0;
|
||||
uint64_t LineSectionSize = 0;
|
||||
uint64_t FrameSectionSize = 0;
|
||||
uint64_t DebugInfoSectionSize = 0;
|
||||
|
||||
/// Keep track of emitted CUs and their Unique ID.
|
||||
struct EmittedUnit {
|
||||
|
||||
Loading…
Reference in New Issue
Block a user