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[FaultMaps] Move FaultMapParser to Object/

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Summary:
That way llvm-objdump can rely on it without adding an extra dependency
on CodeGen.

This change duplicates the FaultKind enum and the code that serializes
it to a string.  I could not figure out a way to get around this without
adding a new dependency to Object

Reviewers: rafael, ab

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D10619

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240364 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Sanjoy Das 2015-06-23 01:05:26 +00:00
parent 14b492752c
commit c49542e5bb
6 changed files with 230 additions and 183 deletions
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146
include/llvm/CodeGen/FaultMaps.h
View File

@ -12,8 +12,6 @@
#include "llvm/ADT/DenseMap.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/Support/Endian.h"
#include "llvm/Support/Format.h"
#include <vector>
#include <map>
@ -71,150 +69,6 @@ private:
void emitFunctionInfo(const MCSymbol *FnLabel, const FunctionFaultInfos &FFI);
};
/// A parser for the __llvm_faultmaps section generated by the FaultMaps class
/// above. This parser is version locked with with the __llvm_faultmaps section
/// generated by the version of LLVM that includes it. No guarantees are made
/// with respect to forward or backward compatibility.
class FaultMapParser {
typedef uint8_t FaultMapVersionType;
static const size_t FaultMapVersionOffset = 0;
typedef uint8_t Reserved0Type;
static const size_t Reserved0Offset =
FaultMapVersionOffset + sizeof(FaultMapVersionType);
typedef uint16_t Reserved1Type;
static const size_t Reserved1Offset = Reserved0Offset + sizeof(Reserved0Type);
typedef uint32_t NumFunctionsType;
static const size_t NumFunctionsOffset =
Reserved1Offset + sizeof(Reserved1Type);
static const size_t FunctionInfosOffset =
NumFunctionsOffset + sizeof(NumFunctionsType);
const uint8_t *P;
const uint8_t *E;
template <typename T> static T read(const uint8_t *P, const uint8_t *E) {
assert(P + sizeof(T) <= E && "out of bounds read!");
return support::endian::read<T, support::little, 1>(P);
}
public:
class FunctionFaultInfoAccessor {
typedef uint32_t FaultKindType;
static const size_t FaultKindOffset = 0;
typedef uint32_t FaultingPCOffsetType;
static const size_t FaultingPCOffsetOffset =
FaultKindOffset + sizeof(FaultKindType);
typedef uint32_t HandlerPCOffsetType;
static const size_t HandlerPCOffsetOffset =
FaultingPCOffsetOffset + sizeof(FaultingPCOffsetType);
const uint8_t *P;
const uint8_t *E;
public:
static const size_t Size =
HandlerPCOffsetOffset + sizeof(HandlerPCOffsetType);
explicit FunctionFaultInfoAccessor(const uint8_t *P, const uint8_t *E)
: P(P), E(E) {}
FaultKindType getFaultKind() const {
return read<FaultKindType>(P + FaultKindOffset, E);
}
FaultingPCOffsetType getFaultingPCOffset() const {
return read<FaultingPCOffsetType>(P + FaultingPCOffsetOffset, E);
}
HandlerPCOffsetType getHandlerPCOffset() const {
return read<HandlerPCOffsetType>(P + HandlerPCOffsetOffset, E);
}
};
class FunctionInfoAccessor {
typedef uint64_t FunctionAddrType;
static const size_t FunctionAddrOffset = 0;
typedef uint32_t NumFaultingPCsType;
static const size_t NumFaultingPCsOffset =
FunctionAddrOffset + sizeof(FunctionAddrType);
typedef uint32_t ReservedType;
static const size_t ReservedOffset =
NumFaultingPCsOffset + sizeof(NumFaultingPCsType);
static const size_t FunctionFaultInfosOffset =
ReservedOffset + sizeof(ReservedType);
static const size_t FunctionInfoHeaderSize = FunctionFaultInfosOffset;
const uint8_t *P;
const uint8_t *E;
public:
FunctionInfoAccessor() : P(nullptr), E(nullptr) {}
explicit FunctionInfoAccessor(const uint8_t *P, const uint8_t *E)
: P(P), E(E) {}
FunctionAddrType getFunctionAddr() const {
return read<FunctionAddrType>(P + FunctionAddrOffset, E);
}
NumFaultingPCsType getNumFaultingPCs() const {
return read<NumFaultingPCsType>(P + NumFaultingPCsOffset, E);
}
FunctionFaultInfoAccessor getFunctionFaultInfoAt(uint32_t Index) const {
assert(Index < getNumFaultingPCs() && "index out of bounds!");
const uint8_t *Begin = P + FunctionFaultInfosOffset +
FunctionFaultInfoAccessor::Size * Index;
return FunctionFaultInfoAccessor(Begin, E);
}
FunctionInfoAccessor getNextFunctionInfo() const {
size_t MySize = FunctionInfoHeaderSize +
getNumFaultingPCs() * FunctionFaultInfoAccessor::Size;
const uint8_t *Begin = P + MySize;
assert(Begin < E && "out of bounds!");
return FunctionInfoAccessor(Begin, E);
}
};
explicit FaultMapParser(const uint8_t *Begin, const uint8_t *End)
: P(Begin), E(End) {}
FaultMapVersionType getFaultMapVersion() const {
auto Version = read<FaultMapVersionType>(P + FaultMapVersionOffset, E);
assert(Version == 1 && "only version 1 supported!");
return Version;
}
NumFunctionsType getNumFunctions() const {
return read<NumFunctionsType>(P + NumFunctionsOffset, E);
}
FunctionInfoAccessor getFirstFunctionInfo() const {
const uint8_t *Begin = P + FunctionInfosOffset;
return FunctionInfoAccessor(Begin, E);
}
};
raw_ostream &
operator<<(raw_ostream &OS, const FaultMapParser::FunctionFaultInfoAccessor &);
raw_ostream &operator<<(raw_ostream &OS,
const FaultMapParser::FunctionInfoAccessor &);
raw_ostream &operator<<(raw_ostream &OS, const FaultMapParser &);
} // namespace llvm
#endif

167
include/llvm/Object/FaultMapParser.h Normal file
View File

@ -0,0 +1,167 @@
//===-- FaultMapParser.h - Parser for the "FaultMaps" section --*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/Support/Endian.h"
#include "llvm/Support/raw_ostream.h"
#ifndef LLVM_OBJECT_FAULTMAPPARSER_H
#define LLVM_OBJECT_FAULTMAPPARSER_H
namespace llvm {
/// A parser for the __llvm_faultmaps section generated by the FaultMaps class
/// declared in llvm/CodeGen/FaultMaps.h. This parser is version locked with
/// with the __llvm_faultmaps section generated by the version of LLVM that
/// includes it. No guarantees are made with respect to forward or backward
/// compatibility.
class FaultMapParser {
typedef uint8_t FaultMapVersionType;
static const size_t FaultMapVersionOffset = 0;
typedef uint8_t Reserved0Type;
static const size_t Reserved0Offset =
FaultMapVersionOffset + sizeof(FaultMapVersionType);
typedef uint16_t Reserved1Type;
static const size_t Reserved1Offset = Reserved0Offset + sizeof(Reserved0Type);
typedef uint32_t NumFunctionsType;
static const size_t NumFunctionsOffset =
Reserved1Offset + sizeof(Reserved1Type);
static const size_t FunctionInfosOffset =
NumFunctionsOffset + sizeof(NumFunctionsType);
const uint8_t *P;
const uint8_t *E;
template <typename T> static T read(const uint8_t *P, const uint8_t *E) {
assert(P + sizeof(T) <= E && "out of bounds read!");
return support::endian::read<T, support::little, 1>(P);
}
public:
enum FaultKind { FaultingLoad = 1, FaultKindMax };
class FunctionFaultInfoAccessor {
typedef uint32_t FaultKindType;
static const size_t FaultKindOffset = 0;
typedef uint32_t FaultingPCOffsetType;
static const size_t FaultingPCOffsetOffset =
FaultKindOffset + sizeof(FaultKindType);
typedef uint32_t HandlerPCOffsetType;
static const size_t HandlerPCOffsetOffset =
FaultingPCOffsetOffset + sizeof(FaultingPCOffsetType);
const uint8_t *P;
const uint8_t *E;
public:
static const size_t Size =
HandlerPCOffsetOffset + sizeof(HandlerPCOffsetType);
explicit FunctionFaultInfoAccessor(const uint8_t *P, const uint8_t *E)
: P(P), E(E) {}
FaultKindType getFaultKind() const {
return read<FaultKindType>(P + FaultKindOffset, E);
}
FaultingPCOffsetType getFaultingPCOffset() const {
return read<FaultingPCOffsetType>(P + FaultingPCOffsetOffset, E);
}
HandlerPCOffsetType getHandlerPCOffset() const {
return read<HandlerPCOffsetType>(P + HandlerPCOffsetOffset, E);
}
};
class FunctionInfoAccessor {
typedef uint64_t FunctionAddrType;
static const size_t FunctionAddrOffset = 0;
typedef uint32_t NumFaultingPCsType;
static const size_t NumFaultingPCsOffset =
FunctionAddrOffset + sizeof(FunctionAddrType);
typedef uint32_t ReservedType;
static const size_t ReservedOffset =
NumFaultingPCsOffset + sizeof(NumFaultingPCsType);
static const size_t FunctionFaultInfosOffset =
ReservedOffset + sizeof(ReservedType);
static const size_t FunctionInfoHeaderSize = FunctionFaultInfosOffset;
const uint8_t *P;
const uint8_t *E;
public:
FunctionInfoAccessor() : P(nullptr), E(nullptr) {}
explicit FunctionInfoAccessor(const uint8_t *P, const uint8_t *E)
: P(P), E(E) {}
FunctionAddrType getFunctionAddr() const {
return read<FunctionAddrType>(P + FunctionAddrOffset, E);
}
NumFaultingPCsType getNumFaultingPCs() const {
return read<NumFaultingPCsType>(P + NumFaultingPCsOffset, E);
}
FunctionFaultInfoAccessor getFunctionFaultInfoAt(uint32_t Index) const {
assert(Index < getNumFaultingPCs() && "index out of bounds!");
const uint8_t *Begin = P + FunctionFaultInfosOffset +
FunctionFaultInfoAccessor::Size * Index;
return FunctionFaultInfoAccessor(Begin, E);
}
FunctionInfoAccessor getNextFunctionInfo() const {
size_t MySize = FunctionInfoHeaderSize +
getNumFaultingPCs() * FunctionFaultInfoAccessor::Size;
const uint8_t *Begin = P + MySize;
assert(Begin < E && "out of bounds!");
return FunctionInfoAccessor(Begin, E);
}
};
explicit FaultMapParser(const uint8_t *Begin, const uint8_t *End)
: P(Begin), E(End) {}
FaultMapVersionType getFaultMapVersion() const {
auto Version = read<FaultMapVersionType>(P + FaultMapVersionOffset, E);
assert(Version == 1 && "only version 1 supported!");
return Version;
}
NumFunctionsType getNumFunctions() const {
return read<NumFunctionsType>(P + NumFunctionsOffset, E);
}
FunctionInfoAccessor getFirstFunctionInfo() const {
const uint8_t *Begin = P + FunctionInfosOffset;
return FunctionInfoAccessor(Begin, E);
}
};
raw_ostream &
operator<<(raw_ostream &OS, const FaultMapParser::FunctionFaultInfoAccessor &);
raw_ostream &operator<<(raw_ostream &OS,
const FaultMapParser::FunctionInfoAccessor &);
raw_ostream &operator<<(raw_ostream &OS, const FaultMapParser &);
} // namespace llvm
#endif

36
lib/CodeGen/FaultMaps.cpp
View File

@ -112,39 +112,3 @@ const char *FaultMaps::faultTypeToString(FaultMaps::FaultKind FT) {
return "FaultingLoad";
}
}
raw_ostream &llvm::
operator<<(raw_ostream &OS,
const FaultMapParser::FunctionFaultInfoAccessor &FFI) {
OS << "Fault kind: "
<< FaultMaps::faultTypeToString((FaultMaps::FaultKind)FFI.getFaultKind())
<< ", faulting PC offset: " << FFI.getFaultingPCOffset()
<< ", handling PC offset: " << FFI.getHandlerPCOffset();
return OS;
}
raw_ostream &llvm::
operator<<(raw_ostream &OS, const FaultMapParser::FunctionInfoAccessor &FI) {
OS << "FunctionAddress: " << format_hex(FI.getFunctionAddr(), 8)
<< ", NumFaultingPCs: " << FI.getNumFaultingPCs() << "\n";
for (unsigned i = 0, e = FI.getNumFaultingPCs(); i != e; ++i)
OS << FI.getFunctionFaultInfoAt(i) << "\n";
return OS;
}
raw_ostream &llvm::operator<<(raw_ostream &OS, const FaultMapParser &FMP) {
OS << "Version: " << format_hex(FMP.getFaultMapVersion(), 2) << "\n";
OS << "NumFunctions: " << FMP.getNumFunctions() << "\n";
if (FMP.getNumFunctions() == 0)
return OS;
FaultMapParser::FunctionInfoAccessor FI;
for (unsigned i = 0, e = FMP.getNumFunctions(); i != e; ++i) {
FI = (i == 0) ? FMP.getFirstFunctionInfo() : FI.getNextFunctionInfo();
OS << FI;
}
return OS;
}

1
lib/Object/CMakeLists.txt
View File

@ -8,6 +8,7 @@ add_llvm_library(LLVMObject
ELFObjectFile.cpp
ELFYAML.cpp
Error.cpp
FaultMapParser.cpp
IRObjectFile.cpp
MachOObjectFile.cpp
MachOUniversal.cpp

61
lib/Object/FaultMapParser.cpp Normal file
View File

@ -0,0 +1,61 @@
//===----------------------- FaultMapParser.cpp ---------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/Object/FaultMapParser.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/Format.h"
using namespace llvm;
const char *faultKindToString(FaultMapParser::FaultKind FT) {
switch (FT) {
default:
llvm_unreachable("unhandled fault type!");
case FaultMapParser::FaultingLoad:
return "FaultingLoad";
}
}
raw_ostream &llvm::
operator<<(raw_ostream &OS,
const FaultMapParser::FunctionFaultInfoAccessor &FFI) {
OS << "Fault kind: "
<< faultKindToString((FaultMapParser::FaultKind)FFI.getFaultKind())
<< ", faulting PC offset: " << FFI.getFaultingPCOffset()
<< ", handling PC offset: " << FFI.getHandlerPCOffset();
return OS;
}
raw_ostream &llvm::
operator<<(raw_ostream &OS, const FaultMapParser::FunctionInfoAccessor &FI) {
OS << "FunctionAddress: " << format_hex(FI.getFunctionAddr(), 8)
<< ", NumFaultingPCs: " << FI.getNumFaultingPCs() << "\n";
for (unsigned i = 0, e = FI.getNumFaultingPCs(); i != e; ++i)
OS << FI.getFunctionFaultInfoAt(i) << "\n";
return OS;
}
raw_ostream &llvm::operator<<(raw_ostream &OS, const FaultMapParser &FMP) {
OS << "Version: " << format_hex(FMP.getFaultMapVersion(), 2) << "\n";
OS << "NumFunctions: " << FMP.getNumFunctions() << "\n";
if (FMP.getNumFunctions() == 0)
return OS;
FaultMapParser::FunctionInfoAccessor FI;
for (unsigned i = 0, e = FMP.getNumFunctions(); i != e; ++i) {
FI = (i == 0) ? FMP.getFirstFunctionInfo() : FI.getNextFunctionInfo();
OS << FI;
}
return OS;
}

2
tools/llvm-objdump/llvm-objdump.cpp
View File

@ -21,7 +21,6 @@
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/Triple.h"
#include "llvm/CodeGen/FaultMaps.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCDisassembler.h"
@ -35,6 +34,7 @@
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/Object/Archive.h"
#include "llvm/Object/ELFObjectFile.h"
#include "llvm/Object/FaultMapParser.h"
#include "llvm/Object/COFF.h"
#include "llvm/Object/MachO.h"
#include "llvm/Object/ObjectFile.h"