[llvm] r348004 - Revert "[BTF] Add BTF DebugInfo"
Yonghong Song via llvm-commits
llvm-commits at lists.llvm.org
Mon Dec 3 14:25:45 PST 2018
On 12/3/18 1:10 PM, David Blaikie wrote:
> For future reference, there's a handy script in LLVM
> (utils/git-svn/git-svnrevert) to make a revert using a subversion
> revision number instead of a git hash - makes it easier for folks
> reading the mailing list to understand what patch was reverted.
>
> Also, please include a description of why a patch was reverted in the
> commit message - again, makes it a bit easier to follow along at home :)
Hi, Blake,
Yes, both suggestions make sense. Thanks for bringing this up.
Definitely will follow next time!
Thanks,
Yonghong
>
> On Fri, Nov 30, 2018 at 8:57 AM Yonghong Song via llvm-commits
> <llvm-commits at lists.llvm.org <mailto:llvm-commits at lists.llvm.org>> wrote:
>
> Author: yhs
> Date: Fri Nov 30 08:54:43 2018
> New Revision: 348004
>
> URL: http://llvm.org/viewvc/llvm-project?rev=348004&view=rev
> <https://urldefense.proofpoint.com/v2/url?u=http-3A__llvm.org_viewvc_llvm-2Dproject-3Frev-3D348004-26view-3Drev&d=DwMFaQ&c=5VD0RTtNlTh3ycd41b3MUw&r=DA8e1B5r073vIqRrFz7MRA&m=R12HNCXGeySNoMI7jEEblproWGQhIqC2nWw-eK5sPtw&s=a3wZj583yDvfud4oANgXXhmoPzNMhnkJ0z15RUosc3U&e=>
> Log:
> Revert "[BTF] Add BTF DebugInfo"
>
> This reverts commit 9c6b970db8bc63b28ce58a129bb1580a6a3c6caf.
>
> Removed:
> llvm/trunk/include/llvm/BinaryFormat/BTF.def
> llvm/trunk/include/llvm/BinaryFormat/BTF.h
> llvm/trunk/lib/CodeGen/AsmPrinter/BTFDebug.cpp
> llvm/trunk/lib/CodeGen/AsmPrinter/BTFDebug.h
> llvm/trunk/lib/CodeGen/AsmPrinter/BTFDebugStub.cpp
> llvm/trunk/test/DebugInfo/BTF/
> Modified:
> llvm/trunk/include/llvm/MC/MCObjectFileInfo.h
> llvm/trunk/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
> llvm/trunk/lib/CodeGen/AsmPrinter/CMakeLists.txt
> llvm/trunk/lib/CodeGen/AsmPrinter/DebugHandlerBase.cpp
> llvm/trunk/lib/CodeGen/AsmPrinter/DebugHandlerBase.h
> llvm/trunk/lib/MC/MCObjectFileInfo.cpp
>
> Removed: llvm/trunk/include/llvm/BinaryFormat/BTF.def
> URL:
> http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/BinaryFormat/BTF.def?rev=348003&view=auto
> <https://urldefense.proofpoint.com/v2/url?u=http-3A__llvm.org_viewvc_llvm-2Dproject_llvm_trunk_include_llvm_BinaryFormat_BTF.def-3Frev-3D348003-26view-3Dauto&d=DwMFaQ&c=5VD0RTtNlTh3ycd41b3MUw&r=DA8e1B5r073vIqRrFz7MRA&m=R12HNCXGeySNoMI7jEEblproWGQhIqC2nWw-eK5sPtw&s=7KqgRnXCVsuv2UHeD7sfFG7bUJj2ful7LqOuJQjGzOY&e=>
> ==============================================================================
> --- llvm/trunk/include/llvm/BinaryFormat/BTF.def (original)
> +++ llvm/trunk/include/llvm/BinaryFormat/BTF.def (removed)
> @@ -1,33 +0,0 @@
> -//===- llvm/BinaryFormat/BTF.def - BTF definitions --------------*-
> C++ -*-===//
> -//
> -// The LLVM Compiler Infrastructure
> -//
> -// This file is distributed under the University of Illinois Open
> Source
> -// License. See LICENSE.TXT for details.
> -//
> -//===----------------------------------------------------------------------===//
> -//
> -// Macros for BTF.
> -//
> -//===----------------------------------------------------------------------===//
> -
> -#if !defined(HANDLE_BTF_KIND)
> -#error "Missing macro definition of HANDLE_BTF_*"
> -#endif
> -
> -HANDLE_BTF_KIND(0, UNKN)
> -HANDLE_BTF_KIND(1, INT)
> -HANDLE_BTF_KIND(2, PTR)
> -HANDLE_BTF_KIND(3, ARRAY)
> -HANDLE_BTF_KIND(4, STRUCT)
> -HANDLE_BTF_KIND(5, UNION)
> -HANDLE_BTF_KIND(6, ENUM)
> -HANDLE_BTF_KIND(7, FWD)
> -HANDLE_BTF_KIND(8, TYPEDEF)
> -HANDLE_BTF_KIND(9, VOLATILE)
> -HANDLE_BTF_KIND(10, CONST)
> -HANDLE_BTF_KIND(11, RESTRICT)
> -HANDLE_BTF_KIND(12, FUNC)
> -HANDLE_BTF_KIND(13, FUNC_PROTO)
> -
> -#undef HANDLE_BTF_KIND
>
> Removed: llvm/trunk/include/llvm/BinaryFormat/BTF.h
> URL:
> http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/BinaryFormat/BTF.h?rev=348003&view=auto
> <https://urldefense.proofpoint.com/v2/url?u=http-3A__llvm.org_viewvc_llvm-2Dproject_llvm_trunk_include_llvm_BinaryFormat_BTF.h-3Frev-3D348003-26view-3Dauto&d=DwMFaQ&c=5VD0RTtNlTh3ycd41b3MUw&r=DA8e1B5r073vIqRrFz7MRA&m=R12HNCXGeySNoMI7jEEblproWGQhIqC2nWw-eK5sPtw&s=xq3PP3LqxnqlEtN6gnPQNuecOxeplX_IdcDC0ye6LqA&e=>
> ==============================================================================
> --- llvm/trunk/include/llvm/BinaryFormat/BTF.h (original)
> +++ llvm/trunk/include/llvm/BinaryFormat/BTF.h (removed)
> @@ -1,203 +0,0 @@
> -//===-- llvm/BinaryFormat/BTF.h ---------------------------------*-
> C++ -*-===//
> -//
> -// The LLVM Compiler Infrastructure
> -//
> -// This file is distributed under the University of Illinois Open
> Source
> -// License. See LICENSE.TXT for details.
> -//
> -//===----------------------------------------------------------------------===//
> -///
> -/// \file
> -/// This file contains the layout of .BTF and .BTF.ext ELF sections.
> -///
> -/// The binary layout for .BTF section:
> -/// struct Header
> -/// Type and Str subsections
> -/// The Type subsection is a collection of types with type id
> starting with 1.
> -/// The Str subsection is simply a collection of strings.
> -///
> -/// The binary layout for .BTF.ext section:
> -/// struct ExtHeader
> -/// FuncInfo and LineInfo subsections
> -/// The FuncInfo subsection is defined as below:
> -/// BTFFuncInfo Size
> -/// struct SecFuncInfo for ELF section #1
> -/// A number of struct BPFFuncInfo for ELF section #1
> -/// struct SecFuncInfo for ELF section #2
> -/// A number of struct BPFFuncInfo for ELF section #2
> -/// ...
> -/// The LineInfo subsection is defined as below:
> -/// BPFLineInfo Size
> -/// struct SecLineInfo for ELF section #1
> -/// A number of struct BPFLineInfo for ELF section #1
> -/// struct SecLineInfo for ELF section #2
> -/// A number of struct BPFLineInfo for ELF section #2
> -/// ...
> -///
> -/// The section formats are also defined at
> -///
> https://github.com/torvalds/linux/blob/master/include/uapi/linux/btf.h
> -///
> -//===----------------------------------------------------------------------===//
> -
> -#ifndef LLVM_BINARYFORMAT_BTF_H
> -#define LLVM_BINARYFORMAT_BTF_H
> -
> -namespace llvm {
> -namespace BTF {
> -
> -enum : uint32_t { MAGIC = 0xeB9F, VERSION = 1 };
> -
> -/// Sizes in bytes of various things in the BTF format.
> -enum {
> - HeaderSize = 24,
> - ExtHeaderSize = 24,
> - CommonTypeSize = 12,
> - BTFArraySize = 12,
> - BTFEnumSize = 8,
> - BTFMemberSize = 12,
> - BTFParamSize = 8,
> - SecFuncInfoSize = 8,
> - SecLineInfoSize = 8,
> - BPFFuncInfoSize = 8,
> - BPFLineInfoSize = 16
> -};
> -
> -/// The .BTF section header definition.
> -struct Header {
> - uint16_t Magic; ///< Magic value
> - uint8_t Version; ///< Version number
> - uint8_t Flags; ///< Extra flags
> - uint32_t HdrLen; ///< Length of this header
> -
> - /// All offsets are in bytes relative to the end of this header.
> - uint32_t TypeOff; ///< Offset of type section
> - uint32_t TypeLen; ///< Length of type section
> - uint32_t StrOff; ///< Offset of string section
> - uint32_t StrLen; ///< Length of string section
> -};
> -
> -enum : uint32_t {
> - MAX_TYPE = 0xffff, ///< Max # of type identifier
> - MAX_NAME_OFFSET = 0xffff, ///< Max offset into the string section
> - MAX_VLEN = 0xffff ///< Max # of struct/union/enum members
> or func args
> -};
> -
> -enum TypeKinds : uint8_t {
> -#define HANDLE_BTF_KIND(ID, NAME) BTF_KIND_##NAME = ID,
> -#include "llvm/BinaryFormat/BTF.def"
> -};
> -
> -/// The BTF common type definition. Different kinds may have
> -/// additional information after this structure data.
> -struct CommonType {
> - /// Type name offset in the string table.
> - uint32_t NameOff;
> -
> - /// "Info" bits arrangement:
> - /// Bits 0-15: vlen (e.g. # of struct's members)
> - /// Bits 16-23: unused
> - /// Bits 24-27: kind (e.g. int, ptr, array...etc)
> - /// Bits 28-31: unused
> - uint32_t Info;
> -
> - /// "Size" is used by INT, ENUM, STRUCT and UNION.
> - /// "Size" tells the size of the type it is describing.
> - ///
> - /// "Type" is used by PTR, TYPEDEF, VOLATILE, CONST, RESTRICT,
> - /// FUNC and FUNC_PROTO.
> - /// "Type" is a type_id referring to another type.
> - union {
> - uint32_t Size;
> - uint32_t Type;
> - };
> -};
> -
> -// For some specific BTF_KIND, "struct CommonType" is immediately
> -// followed by extra data.
> -
> -// BTF_KIND_INT is followed by a u32 and the following
> -// is the 32 bits arrangement:
> -// BTF_INT_ENCODING(VAL) : (((VAL) & 0x0f000000) >> 24)
> -// BTF_INT_OFFSET(VAL) : (((VAL & 0x00ff0000)) >> 16)
> -// BTF_INT_BITS(VAL) : ((VAL) & 0x000000ff)
> -
> -/// Attributes stored in the INT_ENCODING.
> -enum : uint8_t { INT_SIGNED = (1 << 0), INT_CHAR = (1 << 1),
> INT_BOOL = (1 << 2) };
> -
> -/// BTF_KIND_ENUM is followed by multiple "struct BTFEnum".
> -/// The exact number of btf_enum is stored in the vlen (of the
> -/// info in "struct CommonType").
> -struct BTFEnum {
> - uint32_t NameOff; ///< Enum name offset in the string table
> - int32_t Val; ///< Enum member value
> -};
> -
> -/// BTF_KIND_ARRAY is followed by one "struct BTFArray".
> -struct BTFArray {
> - uint32_t ElemType; ///< Element type
> - uint32_t IndexType; ///< Index type
> - uint32_t Nelems; ///< Number of elements for this array
> -};
> -
> -/// BTF_KIND_STRUCT and BTF_KIND_UNION are followed
> -/// by multiple "struct BTFMember". The exact number
> -/// of BTFMember is stored in the vlen (of the info in
> -/// "struct CommonType").
> -struct BTFMember {
> - uint32_t NameOff; ///< Member name offset in the string table
> - uint32_t Type; ///< Member type
> - uint32_t Offset; ///< Offset in bits from the struct start
> -};
> -
> -/// BTF_KIND_FUNC_PROTO are followed by multiple "struct BTFParam".
> -/// The exist number of BTFParam is stored in the vlen (of the info
> -/// in "struct CommonType").
> -struct BTFParam {
> - uint32_t NameOff;
> - uint32_t Type;
> -};
> -
> -/// The .BTF.ext section header definition.
> -struct ExtHeader {
> - uint16_t Magic;
> - uint8_t Version;
> - uint8_t Flags;
> - uint32_t HdrLen;
> -
> - uint32_t FuncInfoOff; ///< Offset of func info section
> - uint32_t FuncInfoLen; ///< Length of func info section
> - uint32_t LineInfoOff; ///< Offset of line info section
> - uint32_t LineInfoLen; ///< Length of line info section
> -};
> -
> -/// Specifying one function info.
> -struct BPFFuncInfo {
> - uint32_t InsnOffset; ///< Byte offset in the section
> - uint32_t TypeId; ///< Type id referring to .BTF type section
> -};
> -
> -/// Specifying function info's in one section.
> -struct SecFuncInfo {
> - uint32_t SecNameOff; ///< Section name index in the .BTF string
> table
> - uint32_t NumFuncInfo; ///< Number of func info's in this section
> -};
> -
> -/// Specifying one line info.
> -struct BPFLineInfo {
> - uint32_t InsnOffset; ///< Byte offset in this section
> - uint32_t FileNameOff; ///< File name index in the .BTF string table
> - uint32_t LineOff; ///< Line index in the .BTF string table
> - uint32_t LineCol; ///< Line num: line_col >> 10,
> - /// col num: line_col & 0x3ff
> -};
> -
> -/// Specifying line info's in one section.
> -struct SecLineInfo {
> - uint32_t SecNameOff; ///< Section name index in the .BTF string tble
> - uint32_t NumLineInfo; ///< Number of line info's in this section
> -};
> -
> -} // End namespace BTF.
> -} // End namespace llvm.
> -
> -#endif
>
> Modified: llvm/trunk/include/llvm/MC/MCObjectFileInfo.h
> URL:
> http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/MC/MCObjectFileInfo.h?rev=348004&r1=348003&r2=348004&view=diff
> <https://urldefense.proofpoint.com/v2/url?u=http-3A__llvm.org_viewvc_llvm-2Dproject_llvm_trunk_include_llvm_MC_MCObjectFileInfo.h-3Frev-3D348004-26r1-3D348003-26r2-3D348004-26view-3Ddiff&d=DwMFaQ&c=5VD0RTtNlTh3ycd41b3MUw&r=DA8e1B5r073vIqRrFz7MRA&m=R12HNCXGeySNoMI7jEEblproWGQhIqC2nWw-eK5sPtw&s=MmGd8ZbKTXGsuWqbM356Jh21vLlwAOl2fglAx7qmTWQ&e=>
> ==============================================================================
> --- llvm/trunk/include/llvm/MC/MCObjectFileInfo.h (original)
> +++ llvm/trunk/include/llvm/MC/MCObjectFileInfo.h Fri Nov 30
> 08:54:43 2018
> @@ -209,14 +209,6 @@ protected:
> MCSection *SXDataSection;
> MCSection *GFIDsSection;
>
> - /// BTF-specific sections. BTF stands for BPF Type Format which is
> - /// designed for BPF target and consumed by BPF loader and
> - /// the kernel.
> - /// @{
> - MCSection *BTFSection;
> - MCSection *BTFExtSection;
> - /// @}
> -
> public:
> void InitMCObjectFileInfo(const Triple &TT, bool PIC, MCContext
> &ctx,
> bool LargeCodeModel = false);
> @@ -388,12 +380,6 @@ public:
> return EHFrameSection;
> }
>
> - // BTF specific sections.
> - /// @{
> - MCSection *getBTFSection() const { return BTFSection; }
> - MCSection *getBTFExtSection() const { return BTFExtSection; }
> - /// @}
> -
> enum Environment { IsMachO, IsELF, IsCOFF, IsWasm };
> Environment getObjectFileType() const { return Env; }
>
>
> Modified: llvm/trunk/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
> URL:
> http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter/AsmPrinter.cpp?rev=348004&r1=348003&r2=348004&view=diff
> <https://urldefense.proofpoint.com/v2/url?u=http-3A__llvm.org_viewvc_llvm-2Dproject_llvm_trunk_lib_CodeGen_AsmPrinter_AsmPrinter.cpp-3Frev-3D348004-26r1-3D348003-26r2-3D348004-26view-3Ddiff&d=DwMFaQ&c=5VD0RTtNlTh3ycd41b3MUw&r=DA8e1B5r073vIqRrFz7MRA&m=R12HNCXGeySNoMI7jEEblproWGQhIqC2nWw-eK5sPtw&s=dsrcJcwCM39JplC0AywFgwggxEmT6SBWaHVnJRlIJPM&e=>
> ==============================================================================
> --- llvm/trunk/lib/CodeGen/AsmPrinter/AsmPrinter.cpp (original)
> +++ llvm/trunk/lib/CodeGen/AsmPrinter/AsmPrinter.cpp Fri Nov 30
> 08:54:43 2018
> @@ -13,7 +13,6 @@
>
> #include "llvm/CodeGen/AsmPrinter.h"
> #include "AsmPrinterHandler.h"
> -#include "BTFDebug.h"
> #include "CodeViewDebug.h"
> #include "DwarfDebug.h"
> #include "DwarfException.h"
> @@ -141,8 +140,6 @@ static const char *const CFGuardDescript
> static const char *const CodeViewLineTablesGroupName = "linetables";
> static const char *const CodeViewLineTablesGroupDescription =
> "CodeView Line Tables";
> -static const char *const BTFGroupName = "BTF";
> -static const char *const BTFGroupDescription = "BTF Emission";
>
> STATISTIC(EmittedInsts, "Number of machine instrs printed");
>
> @@ -314,12 +311,6 @@ bool AsmPrinter::doInitialization(Module
> Handlers.push_back(HandlerInfo(DD, DbgTimerName,
> DbgTimerDescription,
> DWARFGroupName,
> DWARFGroupDescription));
> }
> - const Triple &TT = TM.getTargetTriple();
> - if (TT.getArch() == Triple::bpfel || TT.getArch() ==
> Triple::bpfeb) {
> - Handlers.push_back(HandlerInfo(new BTFDebug(this),
> - DbgTimerName, DbgTimerDescription,
> - BTFGroupName,
> BTFGroupDescription));
> - }
> }
>
> switch (MAI->getExceptionHandlingType()) {
>
> Removed: llvm/trunk/lib/CodeGen/AsmPrinter/BTFDebug.cpp
> URL:
> http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter/BTFDebug.cpp?rev=348003&view=auto
> <https://urldefense.proofpoint.com/v2/url?u=http-3A__llvm.org_viewvc_llvm-2Dproject_llvm_trunk_lib_CodeGen_AsmPrinter_BTFDebug.cpp-3Frev-3D348003-26view-3Dauto&d=DwMFaQ&c=5VD0RTtNlTh3ycd41b3MUw&r=DA8e1B5r073vIqRrFz7MRA&m=R12HNCXGeySNoMI7jEEblproWGQhIqC2nWw-eK5sPtw&s=3FPcPA3m1OjcnpiCt5Tnn_DvM9JOvLLlki5nI5ayJ9Q&e=>
> ==============================================================================
> --- llvm/trunk/lib/CodeGen/AsmPrinter/BTFDebug.cpp (original)
> +++ llvm/trunk/lib/CodeGen/AsmPrinter/BTFDebug.cpp (removed)
> @@ -1,770 +0,0 @@
> -//===- llvm/lib/CodeGen/AsmPrinter/BTFDebug.cpp
> ---------------------------===//
> -//
> -// 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 BTF debug info.
> -//
> -//===----------------------------------------------------------------------===//
> -
> -#include "BTFDebug.h"
> -#include "llvm/CodeGen/AsmPrinter.h"
> -#include "llvm/CodeGen/MachineModuleInfo.h"
> -#include "llvm/MC/MCContext.h"
> -#include "llvm/MC/MCObjectFileInfo.h"
> -#include "llvm/MC/MCSectionELF.h"
> -#include "llvm/MC/MCStreamer.h"
> -#include <fstream>
> -#include <sstream>
> -
> -using namespace llvm;
> -
> -static const char *BTFKindStr[] = {
> -#define HANDLE_BTF_KIND(ID, NAME) "BTF_KIND_" #NAME,
> -#include "llvm/BinaryFormat/BTF.def"
> -};
> -
> -/// Emit a BTF common type.
> -void BTFTypeBase::emitType(MCStreamer &OS) {
> - OS.AddComment(std::string(BTFKindStr[Kind]) + "(id = " +
> std::to_string(Id) +
> - ")");
> - OS.EmitIntValue(BTFType.NameOff, 4);
> - OS.AddComment("0x" + Twine::utohexstr(BTFType.Info));
> - OS.EmitIntValue(BTFType.Info, 4);
> - OS.EmitIntValue(BTFType.Size, 4);
> -}
> -
> -BTFTypeDerived::BTFTypeDerived(const DIDerivedType *DTy, unsigned Tag)
> - : DTy(DTy) {
> - switch (Tag) {
> - case dwarf::DW_TAG_pointer_type:
> - Kind = BTF::BTF_KIND_PTR;
> - break;
> - case dwarf::DW_TAG_const_type:
> - Kind = BTF::BTF_KIND_CONST;
> - break;
> - case dwarf::DW_TAG_volatile_type:
> - Kind = BTF::BTF_KIND_VOLATILE;
> - break;
> - case dwarf::DW_TAG_typedef:
> - Kind = BTF::BTF_KIND_TYPEDEF;
> - break;
> - case dwarf::DW_TAG_restrict_type:
> - Kind = BTF::BTF_KIND_RESTRICT;
> - break;
> - default:
> - llvm_unreachable("Unknown DIDerivedType Tag");
> - }
> - BTFType.Info = Kind << 24;
> -}
> -
> -void BTFTypeDerived::completeType(BTFDebug &BDebug) {
> - BTFType.NameOff = BDebug.addString(DTy->getName());
> -
> - // The base type for PTR/CONST/VOLATILE could be void.
> - const DIType *ResolvedType = DTy->getBaseType().resolve();
> - if (!ResolvedType) {
> - assert((Kind == BTF::BTF_KIND_PTR || Kind == BTF::BTF_KIND_CONST ||
> - Kind == BTF::BTF_KIND_VOLATILE) &&
> - "Invalid null basetype");
> - BTFType.Type = 0;
> - } else {
> - BTFType.Type = BDebug.getTypeId(ResolvedType);
> - }
> -}
> -
> -void BTFTypeDerived::emitType(MCStreamer &OS) {
> BTFTypeBase::emitType(OS); }
> -
> -/// Represent a struct/union forward declaration.
> -BTFTypeFwd::BTFTypeFwd(StringRef Name) : Name(Name) {
> - Kind = BTF::BTF_KIND_FWD;
> - BTFType.Info = Kind << 24;
> - BTFType.Type = 0;
> -}
> -
> -void BTFTypeFwd::completeType(BTFDebug &BDebug) {
> - BTFType.NameOff = BDebug.addString(Name);
> -}
> -
> -void BTFTypeFwd::emitType(MCStreamer &OS) {
> BTFTypeBase::emitType(OS); }
> -
> -BTFTypeInt::BTFTypeInt(uint32_t Encoding, uint32_t SizeInBits,
> - uint32_t OffsetInBits, StringRef TypeName)
> - : Name(TypeName) {
> - // Translate IR int encoding to BTF int encoding.
> - uint8_t BTFEncoding;
> - switch (Encoding) {
> - case dwarf::DW_ATE_boolean:
> - BTFEncoding = BTF::INT_BOOL;
> - break;
> - case dwarf::DW_ATE_signed:
> - case dwarf::DW_ATE_signed_char:
> - BTFEncoding = BTF::INT_SIGNED;
> - break;
> - case dwarf::DW_ATE_unsigned:
> - case dwarf::DW_ATE_unsigned_char:
> - BTFEncoding = 0;
> - break;
> - default:
> - llvm_unreachable("Unknown BTFTypeInt Encoding");
> - }
> -
> - Kind = BTF::BTF_KIND_INT;
> - BTFType.Info = Kind << 24;
> - BTFType.Size = roundupToBytes(SizeInBits);
> - IntVal = (BTFEncoding << 24) | OffsetInBits << 16 | SizeInBits;
> -}
> -
> -void BTFTypeInt::completeType(BTFDebug &BDebug) {
> - BTFType.NameOff = BDebug.addString(Name);
> -}
> -
> -void BTFTypeInt::emitType(MCStreamer &OS) {
> - BTFTypeBase::emitType(OS);
> - OS.AddComment("0x" + Twine::utohexstr(IntVal));
> - OS.EmitIntValue(IntVal, 4);
> -}
> -
> -BTFTypeEnum::BTFTypeEnum(const DICompositeType *ETy, uint32_t VLen)
> : ETy(ETy) {
> - Kind = BTF::BTF_KIND_ENUM;
> - BTFType.Info = Kind << 24 | VLen;
> - BTFType.Size = roundupToBytes(ETy->getSizeInBits());
> -}
> -
> -void BTFTypeEnum::completeType(BTFDebug &BDebug) {
> - BTFType.NameOff = BDebug.addString(ETy->getName());
> -
> - DINodeArray Elements = ETy->getElements();
> - for (const auto Element : Elements) {
> - const auto *Enum = cast<DIEnumerator>(Element);
> -
> - struct BTF::BTFEnum BTFEnum;
> - BTFEnum.NameOff = BDebug.addString(Enum->getName());
> - // BTF enum value is 32bit, enforce it.
> - BTFEnum.Val = static_cast<uint32_t>(Enum->getValue());
> - EnumValues.push_back(BTFEnum);
> - }
> -}
> -
> -void BTFTypeEnum::emitType(MCStreamer &OS) {
> - BTFTypeBase::emitType(OS);
> - for (const auto &Enum : EnumValues) {
> - OS.EmitIntValue(Enum.NameOff, 4);
> - OS.EmitIntValue(Enum.Val, 4);
> - }
> -}
> -
> -BTFTypeArray::BTFTypeArray(const DICompositeType *ATy) : ATy(ATy) {
> - Kind = BTF::BTF_KIND_ARRAY;
> - BTFType.Info = Kind << 24;
> -}
> -
> -/// Represent a BTF array. BTF does not record array dimensions,
> -/// so conceptually a BTF array is a one-dimensional array.
> -void BTFTypeArray::completeType(BTFDebug &BDebug) {
> - BTFType.NameOff = BDebug.addString(ATy->getName());
> - BTFType.Size = 0;
> -
> - auto *BaseType = ATy->getBaseType().resolve();
> - ArrayInfo.ElemType = BDebug.getTypeId(BaseType);
> -
> - // The IR does not really have a type for the index.
> - // A special type for array index should have been
> - // created during initial type traversal. Just
> - // retrieve that type id.
> - ArrayInfo.IndexType = BDebug.getArrayIndexTypeId();
> -
> - // Get the number of array elements.
> - // If the array size is 0, set the number of elements as 0.
> - // Otherwise, recursively traverse the base types to
> - // find the element size. The number of elements is
> - // the totoal array size in bits divided by
> - // element size in bits.
> - uint64_t ArraySizeInBits = ATy->getSizeInBits();
> - if (!ArraySizeInBits) {
> - ArrayInfo.Nelems = 0;
> - } else {
> - uint32_t BaseTypeSize = BaseType->getSizeInBits();
> - while (!BaseTypeSize) {
> - const auto *DDTy = cast<DIDerivedType>(BaseType);
> - BaseType = DDTy->getBaseType().resolve();
> - assert(BaseType);
> - BaseTypeSize = BaseType->getSizeInBits();
> - }
> - ArrayInfo.Nelems = ATy->getSizeInBits() / BaseTypeSize;
> - }
> -}
> -
> -void BTFTypeArray::emitType(MCStreamer &OS) {
> - BTFTypeBase::emitType(OS);
> - OS.EmitIntValue(ArrayInfo.ElemType, 4);
> - OS.EmitIntValue(ArrayInfo.IndexType, 4);
> - OS.EmitIntValue(ArrayInfo.Nelems, 4);
> -}
> -
> -/// Represent either a struct or a union.
> -BTFTypeStruct::BTFTypeStruct(const DICompositeType *STy, bool IsStruct,
> - uint32_t Vlen)
> - : STy(STy) {
> - Kind = IsStruct ? BTF::BTF_KIND_STRUCT : BTF::BTF_KIND_UNION;
> - BTFType.Size = roundupToBytes(STy->getSizeInBits());
> - BTFType.Info = (Kind << 24) | Vlen;
> -}
> -
> -void BTFTypeStruct::completeType(BTFDebug &BDebug) {
> - BTFType.NameOff = BDebug.addString(STy->getName());
> -
> - // Add struct/union members.
> - // If the member is a bitfield, get the corresponding int type
> - // specially created to represent the bitfield. Otherwise,
> - // the member type is the base type of this member.
> - //
> - // FIXME: The real bitfield base type is lost. There
> - // is discussion to define a different type kind for
> - // bitfield in order to preserve its base type.
> - // Revisit this if the new kind or new mechanism is available.
> - const DINodeArray Elements = STy->getElements();
> - for (const auto *Element : Elements) {
> - struct BTF::BTFMember BTFMember;
> - const auto *DDTy = cast<DIDerivedType>(Element);
> -
> - BTFMember.NameOff = BDebug.addString(DDTy->getName());
> - BTFMember.Offset = DDTy->getOffsetInBits();
> - if (DDTy->isBitField())
> - BTFMember.Type = BDebug.getBitFieldTypeId(DDTy);
> - else
> - BTFMember.Type = BDebug.getTypeId(DDTy->getBaseType().resolve());
> - Members.push_back(BTFMember);
> - }
> -}
> -
> -void BTFTypeStruct::emitType(MCStreamer &OS) {
> - BTFTypeBase::emitType(OS);
> - for (const auto &Member : Members) {
> - OS.EmitIntValue(Member.NameOff, 4);
> - OS.EmitIntValue(Member.Type, 4);
> - OS.EmitIntValue(Member.Offset, 4);
> - }
> -}
> -
> -/// The Func kind represents both subprogram and pointee of function
> -/// pointers. If the FuncName is empty, it represents a pointee of
> function
> -/// pointer. Otherwise, it represents a subprogram. The func arg names
> -/// are empty for pointee of function pointer case, and are valid names
> -/// for subprogram.
> -BTFTypeFuncProto::BTFTypeFuncProto(
> - const DISubroutineType *STy, uint32_t VLen,
> - const std::unordered_map<uint32_t, StringRef> &FuncArgNames)
> - : STy(STy), FuncArgNames(FuncArgNames) {
> - Kind = BTF::BTF_KIND_FUNC_PROTO;
> - BTFType.Info = (Kind << 24) | VLen;
> -}
> -
> -void BTFTypeFuncProto::completeType(BTFDebug &BDebug) {
> - DITypeRefArray Elements = STy->getTypeArray();
> - auto RetType = Elements[0].resolve();
> - BTFType.Type = RetType ? BDebug.getTypeId(RetType) : 0;
> - BTFType.NameOff = 0;
> -
> - // For null parameter which is typically the last one
> - // to represent the vararg, encode the NameOff/Type to be 0.
> - for (unsigned I = 1, N = Elements.size(); I < N; ++I) {
> - struct BTF::BTFParam Param;
> - auto Element = Elements[I].resolve();
> - if (Element) {
> - Param.NameOff = BDebug.addString(FuncArgNames[I]);
> - Param.Type = BDebug.getTypeId(Element);
> - } else {
> - Param.NameOff = 0;
> - Param.Type = 0;
> - }
> - Parameters.push_back(Param);
> - }
> -}
> -
> -void BTFTypeFuncProto::emitType(MCStreamer &OS) {
> - BTFTypeBase::emitType(OS);
> - for (const auto &Param : Parameters) {
> - OS.EmitIntValue(Param.NameOff, 4);
> - OS.EmitIntValue(Param.Type, 4);
> - }
> -}
> -
> -BTFTypeFunc::BTFTypeFunc(StringRef FuncName, uint32_t ProtoTypeId)
> - : Name(FuncName) {
> - Kind = BTF::BTF_KIND_FUNC;
> - BTFType.Info = Kind << 24;
> - BTFType.Type = ProtoTypeId;
> -}
> -
> -void BTFTypeFunc::completeType(BTFDebug &BDebug) {
> - BTFType.NameOff = BDebug.addString(Name);
> -}
> -
> -void BTFTypeFunc::emitType(MCStreamer &OS) {
> BTFTypeBase::emitType(OS); }
> -
> -uint32_t BTFStringTable::addString(StringRef S) {
> - // Check whether the string already exists.
> - for (auto &OffsetM : OffsetToIdMap) {
> - if (Table[OffsetM.second] == S)
> - return OffsetM.first;
> - }
> - // Not find, add to the string table.
> - uint32_t Offset = Size;
> - OffsetToIdMap[Offset] = Table.size();
> - Table.push_back(S);
> - Size += S.size() + 1;
> - return Offset;
> -}
> -
> -BTFDebug::BTFDebug(AsmPrinter *AP)
> - : DebugHandlerBase(AP), OS(*Asm->OutStreamer),
> SkipInstruction(false),
> - LineInfoGenerated(false), SecNameOff(0), ArrayIndexTypeId(0) {
> - addString("\0");
> -}
> -
> -void BTFDebug::addType(std::unique_ptr<BTFTypeBase> TypeEntry,
> - const DIType *Ty) {
> - TypeEntry->setId(TypeEntries.size() + 1);
> - DIToIdMap[Ty] = TypeEntry->getId();
> - TypeEntries.push_back(std::move(TypeEntry));
> -}
> -
> -uint32_t BTFDebug::addType(std::unique_ptr<BTFTypeBase> TypeEntry) {
> - TypeEntry->setId(TypeEntries.size() + 1);
> - uint32_t Id = TypeEntry->getId();
> - TypeEntries.push_back(std::move(TypeEntry));
> - return Id;
> -}
> -
> -void BTFDebug::visitBasicType(const DIBasicType *BTy) {
> - // Only int types are supported in BTF.
> - uint32_t Encoding = BTy->getEncoding();
> - if (Encoding != dwarf::DW_ATE_boolean && Encoding !=
> dwarf::DW_ATE_signed &&
> - Encoding != dwarf::DW_ATE_signed_char &&
> - Encoding != dwarf::DW_ATE_unsigned &&
> - Encoding != dwarf::DW_ATE_unsigned_char)
> - return;
> -
> - // Create a BTF type instance for this DIBasicType and put it into
> - // DIToIdMap for cross-type reference check.
> - auto TypeEntry = llvm::make_unique<BTFTypeInt>(
> - Encoding, BTy->getSizeInBits(), BTy->getOffsetInBits(),
> BTy->getName());
> - addType(std::move(TypeEntry), BTy);
> -}
> -
> -/// Handle subprogram or subroutine types.
> -void BTFDebug::visitSubroutineType(
> - const DISubroutineType *STy, bool ForSubprog,
> - const std::unordered_map<uint32_t, StringRef> &FuncArgNames,
> - uint32_t &TypeId) {
> - DITypeRefArray Elements = STy->getTypeArray();
> - uint32_t VLen = Elements.size() - 1;
> - if (VLen > BTF::MAX_VLEN)
> - return;
> -
> - // Subprogram has a valid non-zero-length name, and the pointee of
> - // a function pointer has an empty name. The subprogram type will
> - // not be added to DIToIdMap as it should not be referenced by
> - // any other types.
> - auto TypeEntry = llvm::make_unique<BTFTypeFuncProto>(STy, VLen,
> FuncArgNames);
> - if (ForSubprog)
> - TypeId = addType(std::move(TypeEntry)); // For subprogram
> - else
> - addType(std::move(TypeEntry), STy); // For func ptr
> -
> - // Visit return type and func arg types.
> - for (const auto Element : Elements) {
> - visitTypeEntry(Element.resolve());
> - }
> -}
> -
> -/// Handle structure/union types.
> -void BTFDebug::visitStructType(const DICompositeType *CTy, bool
> IsStruct) {
> - const DINodeArray Elements = CTy->getElements();
> - uint32_t VLen = Elements.size();
> - if (VLen > BTF::MAX_VLEN)
> - return;
> -
> - auto TypeEntry = llvm::make_unique<BTFTypeStruct>(CTy, IsStruct,
> VLen);
> - addType(std::move(TypeEntry), CTy);
> -
> - // Visit all struct members.
> - for (const auto *Element : Elements)
> - visitTypeEntry(cast<DIDerivedType>(Element));
> -}
> -
> -void BTFDebug::visitArrayType(const DICompositeType *CTy) {
> - auto TypeEntry = llvm::make_unique<BTFTypeArray>(CTy);
> - addType(std::move(TypeEntry), CTy);
> -
> - // The IR does not have a type for array index while BTF wants one.
> - // So create an array index type if there is none.
> - if (!ArrayIndexTypeId) {
> - auto TypeEntry =
> llvm::make_unique<BTFTypeInt>(dwarf::DW_ATE_unsigned, 32,
> - 0,
> "__ARRAY_SIZE_TYPE__");
> - ArrayIndexTypeId = addType(std::move(TypeEntry));
> - }
> -
> - // Visit array element type.
> - visitTypeEntry(CTy->getBaseType().resolve());
> -}
> -
> -void BTFDebug::visitEnumType(const DICompositeType *CTy) {
> - DINodeArray Elements = CTy->getElements();
> - uint32_t VLen = Elements.size();
> - if (VLen > BTF::MAX_VLEN)
> - return;
> -
> - auto TypeEntry = llvm::make_unique<BTFTypeEnum>(CTy, VLen);
> - addType(std::move(TypeEntry), CTy);
> - // No need to visit base type as BTF does not encode it.
> -}
> -
> -/// Handle structure/union forward declarations.
> -void BTFDebug::visitFwdDeclType(const DICompositeType *CTy) {
> - auto TypeEntry = llvm::make_unique<BTFTypeFwd>(CTy->getName());
> - addType(std::move(TypeEntry), CTy);
> -}
> -
> -/// Handle structure, union, array and enumeration types.
> -void BTFDebug::visitCompositeType(const DICompositeType *CTy) {
> - auto Tag = CTy->getTag();
> - if (Tag == dwarf::DW_TAG_structure_type || Tag ==
> dwarf::DW_TAG_union_type) {
> - // Handle forward declaration differently as it does not have
> members.
> - if (CTy->isForwardDecl())
> - visitFwdDeclType(CTy);
> - else
> - visitStructType(CTy, Tag == dwarf::DW_TAG_structure_type);
> - } else if (Tag == dwarf::DW_TAG_array_type)
> - visitArrayType(CTy);
> - else if (Tag == dwarf::DW_TAG_enumeration_type)
> - visitEnumType(CTy);
> -}
> -
> -/// Handle pointer, typedef, const, volatile, restrict and member
> types.
> -void BTFDebug::visitDerivedType(const DIDerivedType *DTy) {
> - unsigned Tag = DTy->getTag();
> -
> - if (Tag == dwarf::DW_TAG_pointer_type || Tag ==
> dwarf::DW_TAG_typedef ||
> - Tag == dwarf::DW_TAG_const_type || Tag ==
> dwarf::DW_TAG_volatile_type ||
> - Tag == dwarf::DW_TAG_restrict_type) {
> - auto TypeEntry = llvm::make_unique<BTFTypeDerived>(DTy, Tag);
> - addType(std::move(TypeEntry), DTy);
> - } else if (Tag != dwarf::DW_TAG_member) {
> - return;
> - } else {
> - // Special process member bitfield type.
> - // For bitfield, recursively find the base type and then
> - // construct a special int type with correct bitfield size.
> - // Install the type id in BitFieldTypeMap for later retrieval.
> - //
> - // FIXME: The real bitfield base type is lost. There
> - // is discussion to define a different type kind for
> - // bitfield in order to preserve its base type.
> - // Revisit this if the new kind or new mechanism is available.
> - if (DTy->isBitField()) {
> - const DIType *ResolvedTy = DTy->getBaseType().resolve();
> -
> - while (ResolvedTy) {
> - if (const auto *DerivedTy =
> dyn_cast<DIDerivedType>(ResolvedTy)) {
> - ResolvedTy = DerivedTy->getBaseType().resolve();
> - } else if (const auto *CompositeTy =
> - dyn_cast<DICompositeType>(ResolvedTy)) {
> - assert(CompositeTy->getTag() ==
> dwarf::DW_TAG_enumeration_type &&
> - "Invalid member composite type");
> - ResolvedTy = CompositeTy->getBaseType().resolve();
> - } else
> - break;
> - }
> -
> - const auto *BaseTy = cast<DIBasicType>(ResolvedTy);
> - auto TypeEntry = llvm::make_unique<BTFTypeInt>(
> - BaseTy->getEncoding(), DTy->getSizeInBits(), 0,
> BaseTy->getName());
> - BitFieldTypeMap[DTy] = addType(std::move(TypeEntry));
> - return;
> - }
> - }
> -
> - // Visit base type of pointer, typedef, const, volatile, restrict or
> - // non-bitfield member type.
> - visitTypeEntry(DTy->getBaseType().resolve());
> -}
> -
> -void BTFDebug::visitTypeEntry(const DIType *Ty) {
> - if (!Ty || DIToIdMap.find(Ty) != DIToIdMap.end())
> - return;
> -
> - uint32_t TypeId;
> - if (const auto *BTy = dyn_cast<DIBasicType>(Ty))
> - visitBasicType(BTy);
> - else if (const auto *STy = dyn_cast<DISubroutineType>(Ty))
> - visitSubroutineType(STy, false, std::unordered_map<uint32_t,
> StringRef>(),
> - TypeId);
> - else if (const auto *CTy = dyn_cast<DICompositeType>(Ty))
> - visitCompositeType(CTy);
> - else if (const auto *DTy = dyn_cast<DIDerivedType>(Ty))
> - visitDerivedType(DTy);
> - else
> - llvm_unreachable("Unknown DIType");
> -}
> -
> -/// Read file contents from the actual file or from the source
> -std::string BTFDebug::populateFileContent(const DISubprogram *SP) {
> - auto File = SP->getFile();
> - std::string FileName;
> -
> - if (File->getDirectory().size())
> - FileName = File->getDirectory().str() + "/" +
> File->getFilename().str();
> - else
> - FileName = File->getFilename();
> -
> - // No need to populate the contends if it has been populated!
> - if (FileContent.find(FileName) != FileContent.end())
> - return FileName;
> -
> - std::vector<std::string> Content;
> - std::string Line;
> - Content.push_back(Line); // Line 0 for empty string
> -
> - auto Source = File->getSource();
> - if (Source) {
> - std::istringstream InputString(Source.getValue());
> - while (std::getline(InputString, Line))
> - Content.push_back(Line);
> - } else {
> - std::ifstream InputFile(FileName);
> - while (std::getline(InputFile, Line))
> - Content.push_back(Line);
> - }
> -
> - FileContent[FileName] = Content;
> - return FileName;
> -}
> -
> -void BTFDebug::constructLineInfo(const DISubprogram *SP, MCSymbol
> *Label,
> - uint32_t Line, uint32_t Column) {
> - std::string FileName = populateFileContent(SP);
> - BTFLineInfo LineInfo;
> -
> - LineInfo.Label = Label;
> - LineInfo.FileNameOff = addString(FileName);
> - // If file content is not available, let LineOff = 0.
> - if (Line < FileContent[FileName].size())
> - LineInfo.LineOff = addString(FileContent[FileName][Line]);
> - else
> - LineInfo.LineOff = 0;
> - LineInfo.LineNum = Line;
> - LineInfo.ColumnNum = Column;
> - LineInfoTable[SecNameOff].push_back(LineInfo);
> -}
> -
> -void BTFDebug::emitCommonHeader() {
> - OS.AddComment("0x" + Twine::utohexstr(BTF::MAGIC));
> - OS.EmitIntValue(BTF::MAGIC, 2);
> - OS.EmitIntValue(BTF::VERSION, 1);
> - OS.EmitIntValue(0, 1);
> -}
> -
> -void BTFDebug::emitBTFSection() {
> - MCContext &context = OS.getContext();
> - OS.SwitchSection(context.getObjectFileInfo()->getBTFSection());
> -
> - // Emit header.
> - emitCommonHeader();
> - OS.EmitIntValue(BTF::HeaderSize, 4);
> -
> - uint32_t TypeLen = 0, StrLen;
> - for (const auto &TypeEntry : TypeEntries)
> - TypeLen += TypeEntry->getSize();
> - StrLen = StringTable.getSize();
> -
> - OS.EmitIntValue(0, 4);
> - OS.EmitIntValue(TypeLen, 4);
> - OS.EmitIntValue(TypeLen, 4);
> - OS.EmitIntValue(StrLen, 4);
> -
> - // Emit type table.
> - for (const auto &TypeEntry : TypeEntries)
> - TypeEntry->emitType(OS);
> -
> - // Emit string table.
> - uint32_t StringOffset = 0;
> - for (const auto &S : StringTable.getTable()) {
> - OS.AddComment("string offset=" + std::to_string(StringOffset));
> - OS.EmitBytes(S);
> - OS.EmitBytes(StringRef("\0", 1));
> - StringOffset += S.size() + 1;
> - }
> -}
> -
> -void BTFDebug::emitBTFExtSection() {
> - MCContext &context = OS.getContext();
> - OS.SwitchSection(context.getObjectFileInfo()->getBTFExtSection());
> -
> - // Emit header.
> - emitCommonHeader();
> - OS.EmitIntValue(BTF::ExtHeaderSize, 4);
> -
> - // Account for FuncInfo/LineInfo record size as well.
> - uint32_t FuncLen = 4, LineLen = 4;
> - for (const auto &FuncSec : FuncInfoTable) {
> - FuncLen += BTF::SecFuncInfoSize;
> - FuncLen += FuncSec.second.size() * BTF::BPFFuncInfoSize;
> - }
> - for (const auto &LineSec : LineInfoTable) {
> - LineLen += BTF::SecLineInfoSize;
> - LineLen += LineSec.second.size() * BTF::BPFLineInfoSize;
> - }
> -
> - OS.EmitIntValue(0, 4);
> - OS.EmitIntValue(FuncLen, 4);
> - OS.EmitIntValue(FuncLen, 4);
> - OS.EmitIntValue(LineLen, 4);
> -
> - // Emit func_info table.
> - OS.AddComment("FuncInfo");
> - OS.EmitIntValue(BTF::BPFFuncInfoSize, 4);
> - for (const auto &FuncSec : FuncInfoTable) {
> - OS.AddComment("FuncInfo section string offset=" +
> - std::to_string(FuncSec.first));
> - OS.EmitIntValue(FuncSec.first, 4);
> - OS.EmitIntValue(FuncSec.second.size(), 4);
> - for (const auto &FuncInfo : FuncSec.second) {
> - Asm->EmitLabelReference(FuncInfo.Label, 4);
> - OS.EmitIntValue(FuncInfo.TypeId, 4);
> - }
> - }
> -
> - // Emit line_info table.
> - OS.AddComment("LineInfo");
> - OS.EmitIntValue(BTF::BPFLineInfoSize, 4);
> - for (const auto &LineSec : LineInfoTable) {
> - OS.AddComment("LineInfo section string offset=" +
> - std::to_string(LineSec.first));
> - OS.EmitIntValue(LineSec.first, 4);
> - OS.EmitIntValue(LineSec.second.size(), 4);
> - for (const auto &LineInfo : LineSec.second) {
> - Asm->EmitLabelReference(LineInfo.Label, 4);
> - OS.EmitIntValue(LineInfo.FileNameOff, 4);
> - OS.EmitIntValue(LineInfo.LineOff, 4);
> - OS.AddComment("Line " + std::to_string(LineInfo.LineNum) + "
> Col " +
> - std::to_string(LineInfo.ColumnNum));
> - OS.EmitIntValue(LineInfo.LineNum << 10 | LineInfo.ColumnNum, 4);
> - }
> - }
> -}
> -
> -void BTFDebug::beginFunctionImpl(const MachineFunction *MF) {
> - auto *SP = MF->getFunction().getSubprogram();
> - auto *Unit = SP->getUnit();
> -
> - if (Unit->getEmissionKind() == DICompileUnit::NoDebug) {
> - SkipInstruction = true;
> - return;
> - }
> - SkipInstruction = false;
> -
> - // Collect all types locally referenced in this function.
> - // Use RetainedNodes so we can collect all argument names
> - // even if the argument is not used.
> - std::unordered_map<uint32_t, StringRef> FuncArgNames;
> - for (const DINode *DN : SP->getRetainedNodes()) {
> - if (const auto *DV = dyn_cast<DILocalVariable>(DN)) {
> - visitTypeEntry(DV->getType().resolve());
> -
> - // Collect function arguments for subprogram func type.
> - uint32_t Arg = DV->getArg();
> - if (Arg)
> - FuncArgNames[Arg] = DV->getName();
> - }
> - }
> -
> - // Construct subprogram func proto type.
> - uint32_t ProtoTypeId;
> - visitSubroutineType(SP->getType(), true, FuncArgNames, ProtoTypeId);
> -
> - // Construct subprogram func type
> - auto FuncTypeEntry =
> - llvm::make_unique<BTFTypeFunc>(SP->getName(), ProtoTypeId);
> - uint32_t FuncTypeId = addType(std::move(FuncTypeEntry));
> -
> - // Construct funcinfo and the first lineinfo for the function.
> - MCSymbol *FuncLabel = Asm->getFunctionBegin();
> - BTFFuncInfo FuncInfo;
> - FuncInfo.Label = FuncLabel;
> - FuncInfo.TypeId = FuncTypeId;
> - if (FuncLabel->isInSection()) {
> - MCSection &Section = FuncLabel->getSection();
> - const MCSectionELF *SectionELF = dyn_cast<MCSectionELF>(&Section);
> - assert(SectionELF && "Null section for Function Label");
> - SecNameOff = addString(SectionELF->getSectionName());
> - } else {
> - SecNameOff = addString(".text");
> - }
> - FuncInfoTable[SecNameOff].push_back(FuncInfo);
> -}
> -
> -void BTFDebug::endFunctionImpl(const MachineFunction *MF) {
> - SkipInstruction = false;
> - LineInfoGenerated = false;
> - SecNameOff = 0;
> -}
> -
> -void BTFDebug::beginInstruction(const MachineInstr *MI) {
> - DebugHandlerBase::beginInstruction(MI);
> -
> - if (SkipInstruction || MI->isMetaInstruction() ||
> - MI->getFlag(MachineInstr::FrameSetup))
> - return;
> -
> - // Skip this instruction if no DebugLoc or the DebugLoc
> - // is the same as the previous instruction.
> - const DebugLoc &DL = MI->getDebugLoc();
> - if (!DL || PrevInstLoc == DL) {
> - // This instruction will be skipped, no LineInfo has
> - // been generated, construct one based on function signature.
> - if (LineInfoGenerated == false) {
> - auto *S = MI->getMF()->getFunction().getSubprogram();
> - MCSymbol *FuncLabel = Asm->getFunctionBegin();
> - constructLineInfo(S, FuncLabel, S->getLine(), 0);
> - LineInfoGenerated = true;
> - }
> -
> - return;
> - }
> -
> - // Create a temporary label to remember the insn for lineinfo.
> - MCSymbol *LineSym = OS.getContext().createTempSymbol();
> - OS.EmitLabel(LineSym);
> -
> - // Construct the lineinfo.
> - auto SP = DL.get()->getScope()->getSubprogram();
> - constructLineInfo(SP, LineSym, DL.getLine(), DL.getCol());
> -
> - LineInfoGenerated = true;
> - PrevInstLoc = DL;
> -}
> -
> -void BTFDebug::endModule() {
> - // Collect all types referenced by globals.
> - const Module *M = MMI->getModule();
> - for (const DICompileUnit *CUNode : M->debug_compile_units()) {
> - for (const auto *GVE : CUNode->getGlobalVariables()) {
> - DIGlobalVariable *GV = GVE->getVariable();
> - visitTypeEntry(GV->getType().resolve());
> - }
> - }
> -
> - // Complete BTF type cross refereences.
> - for (const auto &TypeEntry : TypeEntries)
> - TypeEntry->completeType(*this);
> -
> - // Emit BTF sections.
> - emitBTFSection();
> - emitBTFExtSection();
> -}
>
> Removed: llvm/trunk/lib/CodeGen/AsmPrinter/BTFDebug.h
> URL:
> http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter/BTFDebug.h?rev=348003&view=auto
> <https://urldefense.proofpoint.com/v2/url?u=http-3A__llvm.org_viewvc_llvm-2Dproject_llvm_trunk_lib_CodeGen_AsmPrinter_BTFDebug.h-3Frev-3D348003-26view-3Dauto&d=DwMFaQ&c=5VD0RTtNlTh3ycd41b3MUw&r=DA8e1B5r073vIqRrFz7MRA&m=R12HNCXGeySNoMI7jEEblproWGQhIqC2nWw-eK5sPtw&s=w0Q1Ibn3Wm-WeVmwhTw-v16L1r5p_Pks_RMyDdsKwmQ&e=>
> ==============================================================================
> --- llvm/trunk/lib/CodeGen/AsmPrinter/BTFDebug.h (original)
> +++ llvm/trunk/lib/CodeGen/AsmPrinter/BTFDebug.h (removed)
> @@ -1,293 +0,0 @@
> -//===- llvm/lib/CodeGen/AsmPrinter/BTFDebug.h -------------------*-
> C++ -*-===//
> -//
> -// The LLVM Compiler Infrastructure
> -//
> -// This file is distributed under the University of Illinois Open
> Source
> -// License. See LICENSE.TXT for details.
> -//
> -//===----------------------------------------------------------------------===//
> -///
> -/// \file
> -/// This file contains support for writing BTF debug info.
> -///
> -//===----------------------------------------------------------------------===//
> -
> -#ifndef LLVM_LIB_CODEGEN_ASMPRINTER_BTFDEBUG_H
> -#define LLVM_LIB_CODEGEN_ASMPRINTER_BTFDEBUG_H
> -
> -#include "DebugHandlerBase.h"
> -#include "llvm/ADT/StringMap.h"
> -#include "llvm/BinaryFormat/BTF.h"
> -#include <unordered_map>
> -
> -namespace llvm {
> -
> -class AsmPrinter;
> -class BTFDebug;
> -class DIType;
> -class MCStreamer;
> -class MCSymbol;
> -class MachineFunction;
> -
> -/// The base class for BTF type generation.
> -class BTFTypeBase {
> -protected:
> - uint8_t Kind;
> - uint32_t Id;
> - struct BTF::CommonType BTFType;
> -
> -public:
> - virtual ~BTFTypeBase() = default;
> - void setId(uint32_t Id) { this->Id = Id; }
> - uint32_t getId() { return Id; }
> - uint32_t roundupToBytes(uint32_t NumBits) { return (NumBits + 7)
> >> 3; }
> - /// Get the size of this BTF type entry.
> - virtual uint32_t getSize() { return BTF::CommonTypeSize; }
> - /// Complete BTF type generation after all related DebugInfo types
> - /// have been visited so their BTF type id's are available
> - /// for cross referece.
> - virtual void completeType(BTFDebug &BDebug) {}
> - /// Emit types for this BTF type entry.
> - virtual void emitType(MCStreamer &OS);
> -};
> -
> -/// Handle several derived types include pointer, const,
> -/// volatile, typedef and restrict.
> -class BTFTypeDerived : public BTFTypeBase {
> - const DIDerivedType *DTy;
> -
> -public:
> - BTFTypeDerived(const DIDerivedType *Ty, unsigned Tag);
> - void completeType(BTFDebug &BDebug);
> - void emitType(MCStreamer &OS);
> -};
> -
> -/// Handle struct or union forward declaration.
> -class BTFTypeFwd : public BTFTypeBase {
> - StringRef Name;
> -
> -public:
> - BTFTypeFwd(StringRef Name);
> - void completeType(BTFDebug &BDebug);
> - void emitType(MCStreamer &OS);
> -};
> -
> -/// Handle int type.
> -class BTFTypeInt : public BTFTypeBase {
> - StringRef Name;
> - uint32_t IntVal; ///< Encoding, offset, bits
> -
> -public:
> - BTFTypeInt(uint32_t Encoding, uint32_t SizeInBits, uint32_t
> OffsetInBits,
> - StringRef TypeName);
> - uint32_t getSize() { return BTFTypeBase::getSize() +
> sizeof(uint32_t); }
> - void completeType(BTFDebug &BDebug);
> - void emitType(MCStreamer &OS);
> -};
> -
> -/// Handle enumerate type.
> -class BTFTypeEnum : public BTFTypeBase {
> - const DICompositeType *ETy;
> - std::vector<struct BTF::BTFEnum> EnumValues;
> -
> -public:
> - BTFTypeEnum(const DICompositeType *ETy, uint32_t NumValues);
> - uint32_t getSize() {
> - return BTFTypeBase::getSize() + EnumValues.size() *
> BTF::BTFEnumSize;
> - }
> - void completeType(BTFDebug &BDebug);
> - void emitType(MCStreamer &OS);
> -};
> -
> -/// Handle array type.
> -class BTFTypeArray : public BTFTypeBase {
> - const DICompositeType *ATy;
> - struct BTF::BTFArray ArrayInfo;
> -
> -public:
> - BTFTypeArray(const DICompositeType *ATy);
> - uint32_t getSize() { return BTFTypeBase::getSize() +
> BTF::BTFArraySize; }
> - void completeType(BTFDebug &BDebug);
> - void emitType(MCStreamer &OS);
> -};
> -
> -/// Handle struct/union type.
> -class BTFTypeStruct : public BTFTypeBase {
> - const DICompositeType *STy;
> - std::vector<struct BTF::BTFMember> Members;
> -
> -public:
> - BTFTypeStruct(const DICompositeType *STy, bool IsStruct, uint32_t
> NumMembers);
> - uint32_t getSize() {
> - return BTFTypeBase::getSize() + Members.size() *
> BTF::BTFMemberSize;
> - }
> - void completeType(BTFDebug &BDebug);
> - void emitType(MCStreamer &OS);
> -};
> -
> -/// Handle function pointer.
> -class BTFTypeFuncProto : public BTFTypeBase {
> - const DISubroutineType *STy;
> - std::unordered_map<uint32_t, StringRef> FuncArgNames;
> - std::vector<struct BTF::BTFParam> Parameters;
> -
> -public:
> - BTFTypeFuncProto(const DISubroutineType *STy, uint32_t NumParams,
> - const std::unordered_map<uint32_t, StringRef>
> &FuncArgNames);
> - uint32_t getSize() {
> - return BTFTypeBase::getSize() + Parameters.size() *
> BTF::BTFParamSize;
> - }
> - void completeType(BTFDebug &BDebug);
> - void emitType(MCStreamer &OS);
> -};
> -
> -/// Handle subprogram
> -class BTFTypeFunc : public BTFTypeBase {
> - StringRef Name;
> -
> -public:
> - BTFTypeFunc(StringRef FuncName, uint32_t ProtoTypeId);
> - uint32_t getSize() { return BTFTypeBase::getSize(); }
> - void completeType(BTFDebug &BDebug);
> - void emitType(MCStreamer &OS);
> -};
> -
> -/// String table.
> -class BTFStringTable {
> - /// String table size in bytes.
> - uint32_t Size;
> - /// A mapping from string table offset to the index
> - /// of the Table. It is used to avoid putting
> - /// duplicated strings in the table.
> - std::unordered_map<uint32_t, uint32_t> OffsetToIdMap;
> - /// A vector of strings to represent the string table.
> - std::vector<std::string> Table;
> -
> -public:
> - BTFStringTable() : Size(0) {}
> - uint32_t getSize() { return Size; }
> - std::vector<std::string> &getTable() { return Table; }
> - /// Add a string to the string table and returns its offset
> - /// in the table.
> - uint32_t addString(StringRef S);
> -};
> -
> -/// Represent one func and its type id.
> -struct BTFFuncInfo {
> - const MCSymbol *Label; ///< Func MCSymbol
> - uint32_t TypeId; ///< Type id referring to .BTF type section
> -};
> -
> -/// Represent one line info.
> -struct BTFLineInfo {
> - MCSymbol *Label; ///< MCSymbol identifying insn for the lineinfo
> - uint32_t FileNameOff; ///< file name offset in the .BTF string table
> - uint32_t LineOff; ///< line offset in the .BTF string table
> - uint32_t LineNum; ///< the line number
> - uint32_t ColumnNum; ///< the column number
> -};
> -
> -/// Collect and emit BTF information.
> -class BTFDebug : public DebugHandlerBase {
> - MCStreamer &OS;
> - bool SkipInstruction;
> - bool LineInfoGenerated;
> - uint32_t SecNameOff;
> - uint32_t ArrayIndexTypeId;
> - BTFStringTable StringTable;
> - std::vector<std::unique_ptr<BTFTypeBase>> TypeEntries;
> - std::unordered_map<const DIType *, uint32_t> DIToIdMap;
> - std::unordered_map<const DIType *, uint32_t> BitFieldTypeMap;
> - std::unordered_map<uint32_t, std::vector<BTFFuncInfo>> FuncInfoTable;
> - std::unordered_map<uint32_t, std::vector<BTFLineInfo>> LineInfoTable;
> - StringMap<std::vector<std::string>> FileContent;
> -
> - /// Add types to TypeEntries.
> - /// @{
> - /// Add types to TypeEntries and DIToIdMap.
> - void addType(std::unique_ptr<BTFTypeBase> TypeEntry, const DIType
> *Ty);
> - /// Add types to TypeEntries only and return type id.
> - uint32_t addType(std::unique_ptr<BTFTypeBase> TypeEntry);
> - /// @}
> -
> - /// IR type visiting functions.
> - /// @{
> - void visitTypeEntry(const DIType *Ty);
> - void visitBasicType(const DIBasicType *BTy);
> - void visitSubroutineType(
> - const DISubroutineType *STy, bool ForSubprog,
> - const std::unordered_map<uint32_t, StringRef> &FuncArgNames,
> - uint32_t &TypeId);
> - void visitFwdDeclType(const DICompositeType *CTy);
> - void visitCompositeType(const DICompositeType *CTy);
> - void visitStructType(const DICompositeType *STy, bool IsStruct);
> - void visitArrayType(const DICompositeType *ATy);
> - void visitEnumType(const DICompositeType *ETy);
> - void visitDerivedType(const DIDerivedType *DTy);
> - /// @}
> -
> - /// Get the file content for the subprogram. Certain lines of the
> file
> - /// later may be put into string table and referenced by line info.
> - std::string populateFileContent(const DISubprogram *SP);
> -
> - /// Construct a line info.
> - void constructLineInfo(const DISubprogram *SP, MCSymbol *Label,
> uint32_t Line,
> - uint32_t Column);
> -
> - /// Emit common header of .BTF and .BTF.ext sections.
> - void emitCommonHeader();
> -
> - /// Emit the .BTF section.
> - void emitBTFSection();
> -
> - /// Emit the .BTF.ext section.
> - void emitBTFExtSection();
> -
> -protected:
> - /// Gather pre-function debug information.
> - void beginFunctionImpl(const MachineFunction *MF) override;
> -
> - /// Post process after all instructions in this function are
> processed.
> - void endFunctionImpl(const MachineFunction *MF) override;
> -
> -public:
> - BTFDebug(AsmPrinter *AP);
> -
> - /// Get the special array index type id.
> - uint32_t getArrayIndexTypeId() {
> - assert(ArrayIndexTypeId);
> - return ArrayIndexTypeId;
> - }
> -
> - /// Add string to the string table.
> - size_t addString(StringRef S) { return StringTable.addString(S); }
> -
> - /// Get the type id for a particular DIType.
> - uint32_t getTypeId(const DIType *Ty) {
> - assert(Ty && "Invalid null Type");
> - assert(DIToIdMap.find(Ty) != DIToIdMap.end() &&
> - "DIType not added in the BDIToIdMap");
> - return DIToIdMap[Ty];
> - }
> -
> - /// Get the bitfield type id. If the struct/union member
> - /// is a bitfield, a special type is created for it.
> - uint32_t getBitFieldTypeId(const DIDerivedType *Ty) {
> - assert(Ty && "Invalid null Type");
> - assert(BitFieldTypeMap.find(Ty) != BitFieldTypeMap.end() &&
> - "DIDerivedType not added in the BitFieldTypeMap");
> - return BitFieldTypeMap[Ty];
> - }
> -
> - void setSymbolSize(const MCSymbol *Symbol, uint64_t Size) override {}
> -
> - /// Process beginning of an instruction.
> - void beginInstruction(const MachineInstr *MI) override;
> -
> - /// Complete all the types and emit the BTF sections.
> - void endModule() override;
> -};
> -
> -} // end namespace llvm
> -
> -#endif // LLVM_LIB_CODEGEN_ASMPRINTER_BTFDEBUG_H
>
> Removed: llvm/trunk/lib/CodeGen/AsmPrinter/BTFDebugStub.cpp
> URL:
> http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter/BTFDebugStub.cpp?rev=348003&view=auto
> <https://urldefense.proofpoint.com/v2/url?u=http-3A__llvm.org_viewvc_llvm-2Dproject_llvm_trunk_lib_CodeGen_AsmPrinter_BTFDebugStub.cpp-3Frev-3D348003-26view-3Dauto&d=DwMFaQ&c=5VD0RTtNlTh3ycd41b3MUw&r=DA8e1B5r073vIqRrFz7MRA&m=R12HNCXGeySNoMI7jEEblproWGQhIqC2nWw-eK5sPtw&s=YnLR9WdfN0EHrJogWVAsbY88Y4rNBV2ZOgkeMNlSO68&e=>
> ==============================================================================
> --- llvm/trunk/lib/CodeGen/AsmPrinter/BTFDebugStub.cpp (original)
> +++ llvm/trunk/lib/CodeGen/AsmPrinter/BTFDebugStub.cpp (removed)
> @@ -1,28 +0,0 @@
> -//===- llvm/lib/CodeGen/AsmPrinter/BTFDebugStub.cpp -------------*-
> C++ -*-===//
> -//
> -// The LLVM Compiler Infrastructure
> -//
> -// This file is distributed under the University of Illinois Open
> Source
> -// License. See LICENSE.TXT for details.
> -//
> -//===----------------------------------------------------------------------===//
> -///
> -/// \file
> -/// This file is a stub for BTF generation support. The real
> implementation
> -/// is at BTFDebug.cpp which will be included if BPF target is built.
> -///
> -//===----------------------------------------------------------------------===//
> -
> -#include "DebugHandlerBase.h"
> -
> -namespace llvm {
> -
> -/// Stub class for emitting the BTF .
> -class BTFDebug : public DebugHandlerBase {
> -public:
> - BTFDebug(AsmPrinter *AP);
> -};
> -
> -BTFDebug::BTFDebug(AsmPrinter *AP) : DebugHandlerBase(AP) {}
> -
> -} // end namespace llvm
>
> Modified: llvm/trunk/lib/CodeGen/AsmPrinter/CMakeLists.txt
> URL:
> http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter/CMakeLists.txt?rev=348004&r1=348003&r2=348004&view=diff
> <https://urldefense.proofpoint.com/v2/url?u=http-3A__llvm.org_viewvc_llvm-2Dproject_llvm_trunk_lib_CodeGen_AsmPrinter_CMakeLists.txt-3Frev-3D348004-26r1-3D348003-26r2-3D348004-26view-3Ddiff&d=DwMFaQ&c=5VD0RTtNlTh3ycd41b3MUw&r=DA8e1B5r073vIqRrFz7MRA&m=R12HNCXGeySNoMI7jEEblproWGQhIqC2nWw-eK5sPtw&s=P4ZoYFgAP4wfX8eLZyOD4iP1MCZ-ukU9EEl0FBof-fA&e=>
> ==============================================================================
> --- llvm/trunk/lib/CodeGen/AsmPrinter/CMakeLists.txt (original)
> +++ llvm/trunk/lib/CodeGen/AsmPrinter/CMakeLists.txt Fri Nov 30
> 08:54:43 2018
> @@ -1,14 +1,3 @@
> -# Based on whether BPF target is built or not,
> -# either BTFDebug.cpp or BTFDebugStub.cpp will be included,
> -# but not both.
> -set(LLVM_OPTIONAL_SOURCES "BTFDebug.cpp" "BTFDebugStub.cpp")
> -list(FIND LLVM_TARGETS_TO_BUILD "BPF" idx)
> -if( NOT idx LESS 0 )
> - set(BTFDebug_File "BTFDebug.cpp")
> -else()
> - set(BTFDebug_File "BTFDebugStub.cpp")
> -endif()
> -
> add_llvm_library(LLVMAsmPrinter
> AccelTable.cpp
> AddressPool.cpp
> @@ -35,7 +24,6 @@ add_llvm_library(LLVMAsmPrinter
> WinException.cpp
> CodeViewDebug.cpp
> WasmException.cpp
> - ${BTFDebug_File}
>
> DEPENDS
> intrinsics_gen
>
> Modified: llvm/trunk/lib/CodeGen/AsmPrinter/DebugHandlerBase.cpp
> URL:
> http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter/DebugHandlerBase.cpp?rev=348004&r1=348003&r2=348004&view=diff
> <https://urldefense.proofpoint.com/v2/url?u=http-3A__llvm.org_viewvc_llvm-2Dproject_llvm_trunk_lib_CodeGen_AsmPrinter_DebugHandlerBase.cpp-3Frev-3D348004-26r1-3D348003-26r2-3D348004-26view-3Ddiff&d=DwMFaQ&c=5VD0RTtNlTh3ycd41b3MUw&r=DA8e1B5r073vIqRrFz7MRA&m=R12HNCXGeySNoMI7jEEblproWGQhIqC2nWw-eK5sPtw&s=0IUQ_vibyys70mp3XHp3lOSjcUVASUbDePQINMWO_7k&e=>
> ==============================================================================
> --- llvm/trunk/lib/CodeGen/AsmPrinter/DebugHandlerBase.cpp (original)
> +++ llvm/trunk/lib/CodeGen/AsmPrinter/DebugHandlerBase.cpp Fri Nov
> 30 08:54:43 2018
> @@ -8,7 +8,7 @@
> //===----------------------------------------------------------------------===//
> //
> // Common functionality for different debug information format
> backends.
> -// LLVM currently supports DWARF, CodeView and BTF.
> +// LLVM currently supports DWARF and CodeView.
> //
> //===----------------------------------------------------------------------===//
>
>
> Modified: llvm/trunk/lib/CodeGen/AsmPrinter/DebugHandlerBase.h
> URL:
> http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter/DebugHandlerBase.h?rev=348004&r1=348003&r2=348004&view=diff
> <https://urldefense.proofpoint.com/v2/url?u=http-3A__llvm.org_viewvc_llvm-2Dproject_llvm_trunk_lib_CodeGen_AsmPrinter_DebugHandlerBase.h-3Frev-3D348004-26r1-3D348003-26r2-3D348004-26view-3Ddiff&d=DwMFaQ&c=5VD0RTtNlTh3ycd41b3MUw&r=DA8e1B5r073vIqRrFz7MRA&m=R12HNCXGeySNoMI7jEEblproWGQhIqC2nWw-eK5sPtw&s=ryZbr1vb-5aq5jNUF3C-P3xXh7IXWhHBUWDosHtNjCo&e=>
> ==============================================================================
> --- llvm/trunk/lib/CodeGen/AsmPrinter/DebugHandlerBase.h (original)
> +++ llvm/trunk/lib/CodeGen/AsmPrinter/DebugHandlerBase.h Fri Nov 30
> 08:54:43 2018
> @@ -8,7 +8,7 @@
> //===----------------------------------------------------------------------===//
> //
> // Common functionality for different debug information format
> backends.
> -// LLVM currently supports DWARF, CodeView and BTF.
> +// LLVM currently supports DWARF and CodeView.
> //
> //===----------------------------------------------------------------------===//
>
>
> Modified: llvm/trunk/lib/MC/MCObjectFileInfo.cpp
> URL:
> http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/MC/MCObjectFileInfo.cpp?rev=348004&r1=348003&r2=348004&view=diff
> <https://urldefense.proofpoint.com/v2/url?u=http-3A__llvm.org_viewvc_llvm-2Dproject_llvm_trunk_lib_MC_MCObjectFileInfo.cpp-3Frev-3D348004-26r1-3D348003-26r2-3D348004-26view-3Ddiff&d=DwMFaQ&c=5VD0RTtNlTh3ycd41b3MUw&r=DA8e1B5r073vIqRrFz7MRA&m=R12HNCXGeySNoMI7jEEblproWGQhIqC2nWw-eK5sPtw&s=7ecLrWM8xsIJfcvHl5MXgQsOFQ9lUBI6CVqze0B6uQQ&e=>
> ==============================================================================
> --- llvm/trunk/lib/MC/MCObjectFileInfo.cpp (original)
> +++ llvm/trunk/lib/MC/MCObjectFileInfo.cpp Fri Nov 30 08:54:43 2018
> @@ -476,9 +476,6 @@ void MCObjectFileInfo::initELFMCObjectFi
> Ctx->getELFSection(".eh_frame", EHSectionType, EHSectionFlags);
>
> StackSizesSection = Ctx->getELFSection(".stack_sizes",
> ELF::SHT_PROGBITS, 0);
> -
> - BTFSection = Ctx->getELFSection(".BTF", ELF::SHT_PROGBITS, 0);
> - BTFExtSection = Ctx->getELFSection(".BTF.ext", ELF::SHT_PROGBITS, 0);
> }
>
> void MCObjectFileInfo::initCOFFMCObjectFileInfo(const Triple &T) {
>
>
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