llvm-6502/include/llvm/CodeGen/MachineModuleInfo.h

1306 lines
45 KiB
C
Raw Normal View History

//===-- llvm/CodeGen/MachineModuleInfo.h ------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Collect meta information for a module. This information should be in a
// neutral form that can be used by different debugging and exception handling
// schemes.
//
// The organization of information is primarily clustered around the source
// compile units. The main exception is source line correspondence where
// inlining may interleave code from various compile units.
//
// The following information can be retrieved from the MachineModuleInfo.
//
// -- Source directories - Directories are uniqued based on their canonical
// string and assigned a sequential numeric ID (base 1.)
// -- Source files - Files are also uniqued based on their name and directory
// ID. A file ID is sequential number (base 1.)
// -- Source line correspondence - A vector of file ID, line#, column# triples.
// A DEBUG_LOCATION instruction is generated by the DAG Legalizer
// corresponding to each entry in the source line list. This allows a debug
// emitter to generate labels referenced by debug information tables.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CODEGEN_MACHINEMODULEINFO_H
#define LLVM_CODEGEN_MACHINEMODULEINFO_H
#include "llvm/Support/Dwarf.h"
#include "llvm/Support/DataTypes.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/UniqueVector.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/GlobalValue.h"
#include "llvm/Pass.h"
namespace llvm {
//===----------------------------------------------------------------------===//
// Forward declarations.
class Constant;
class DebugInfoDesc;
class GlobalVariable;
class MachineBasicBlock;
class MachineFunction;
class MachineMove;
class Module;
class PointerType;
class StructType;
//===----------------------------------------------------------------------===//
// Debug info constants.
enum {
LLVMDebugVersion = (6 << 16), // Current version of debug information.
LLVMDebugVersion5 = (5 << 16), // Constant for version 5.
LLVMDebugVersion4 = (4 << 16), // Constant for version 4.
LLVMDebugVersionMask = 0xffff0000 // Mask for version number.
};
//===----------------------------------------------------------------------===//
/// DIVisitor - Subclasses of this class apply steps to each of the fields in
/// the supplied DebugInfoDesc.
class DIVisitor {
public:
DIVisitor() {}
virtual ~DIVisitor() {}
/// ApplyToFields - Target the visitor to each field of the debug information
/// descriptor.
void ApplyToFields(DebugInfoDesc *DD);
/// Apply - Subclasses override each of these methods to perform the
/// appropriate action for the type of field.
virtual void Apply(int &Field) = 0;
virtual void Apply(unsigned &Field) = 0;
virtual void Apply(int64_t &Field) = 0;
virtual void Apply(uint64_t &Field) = 0;
virtual void Apply(bool &Field) = 0;
virtual void Apply(std::string &Field) = 0;
virtual void Apply(DebugInfoDesc *&Field) = 0;
virtual void Apply(GlobalVariable *&Field) = 0;
virtual void Apply(std::vector<DebugInfoDesc *> &Field) = 0;
};
//===----------------------------------------------------------------------===//
/// DebugInfoDesc - This class is the base class for debug info descriptors.
///
class DebugInfoDesc {
private:
unsigned Tag; // Content indicator. Dwarf values are
// used but that does not limit use to
// Dwarf writers.
protected:
explicit DebugInfoDesc(unsigned T) : Tag(T | LLVMDebugVersion) {}
public:
virtual ~DebugInfoDesc() {}
// Accessors
unsigned getTag() const { return Tag & ~LLVMDebugVersionMask; }
unsigned getVersion() const { return Tag & LLVMDebugVersionMask; }
void setTag(unsigned T) { Tag = T | LLVMDebugVersion; }
/// TagFromGlobal - Returns the tag number from a debug info descriptor
/// GlobalVariable. Return DIIValid if operand is not an unsigned int.
static unsigned TagFromGlobal(GlobalVariable *GV);
/// VersionFromGlobal - Returns the version number from a debug info
/// descriptor GlobalVariable. Return DIIValid if operand is not an unsigned
/// int.
static unsigned VersionFromGlobal(GlobalVariable *GV);
/// DescFactory - Create an instance of debug info descriptor based on Tag.
/// Return NULL if not a recognized Tag.
static DebugInfoDesc *DescFactory(unsigned Tag);
/// getLinkage - get linkage appropriate for this type of descriptor.
///
virtual GlobalValue::LinkageTypes getLinkage() const;
//===--------------------------------------------------------------------===//
// Subclasses should supply the following static methods.
// Implement isa/cast/dyncast.
static bool classof(const DebugInfoDesc *) { return true; }
//===--------------------------------------------------------------------===//
// Subclasses should supply the following virtual methods.
/// ApplyToFields - Target the vistor to the fields of the descriptor.
///
virtual void ApplyToFields(DIVisitor *Visitor);
/// getDescString - Return a string used to compose global names and labels.
///
virtual const char *getDescString() const = 0;
/// getTypeString - Return a string used to label this descriptor's type.
///
virtual const char *getTypeString() const = 0;
#ifndef NDEBUG
virtual void dump() = 0;
#endif
};
//===----------------------------------------------------------------------===//
/// AnchorDesc - Descriptors of this class act as markers for identifying
/// descriptors of certain groups.
class AnchoredDesc;
class AnchorDesc : public DebugInfoDesc {
private:
unsigned AnchorTag; // Tag number of descriptors anchored
// by this object.
public:
AnchorDesc();
explicit AnchorDesc(AnchoredDesc *D);
// Accessors
unsigned getAnchorTag() const { return AnchorTag; }
// Implement isa/cast/dyncast.
static bool classof(const AnchorDesc *) { return true; }
static bool classof(const DebugInfoDesc *D);
/// getLinkage - get linkage appropriate for this type of descriptor.
///
virtual GlobalValue::LinkageTypes getLinkage() const;
/// ApplyToFields - Target the visitor to the fields of the AnchorDesc.
///
virtual void ApplyToFields(DIVisitor *Visitor);
/// getDescString - Return a string used to compose global names and labels.
///
virtual const char *getDescString() const;
/// getTypeString - Return a string used to label this descriptor's type.
///
virtual const char *getTypeString() const;
#ifndef NDEBUG
virtual void dump();
#endif
};
//===----------------------------------------------------------------------===//
/// AnchoredDesc - This class manages anchors for a variety of top level
/// descriptors.
class AnchoredDesc : public DebugInfoDesc {
private:
DebugInfoDesc *Anchor; // Anchor for all descriptors of the
// same type.
protected:
explicit AnchoredDesc(unsigned T);
public:
// Accessors.
AnchorDesc *getAnchor() const { return static_cast<AnchorDesc *>(Anchor); }
void setAnchor(AnchorDesc *A) { Anchor = static_cast<DebugInfoDesc *>(A); }
//===--------------------------------------------------------------------===//
// Subclasses should supply the following virtual methods.
/// getAnchorString - Return a string used to label descriptor's anchor.
///
virtual const char *getAnchorString() const = 0;
/// ApplyToFields - Target the visitor to the fields of the AnchoredDesc.
///
virtual void ApplyToFields(DIVisitor *Visitor);
};
//===----------------------------------------------------------------------===//
/// CompileUnitDesc - This class packages debug information associated with a
/// source/header file.
class CompileUnitDesc : public AnchoredDesc {
private:
unsigned Language; // Language number (ex. DW_LANG_C89.)
std::string FileName; // Source file name.
std::string Directory; // Source file directory.
std::string Producer; // Compiler string.
public:
CompileUnitDesc();
// Accessors
unsigned getLanguage() const { return Language; }
const std::string &getFileName() const { return FileName; }
const std::string &getDirectory() const { return Directory; }
const std::string &getProducer() const { return Producer; }
void setLanguage(unsigned L) { Language = L; }
void setFileName(const std::string &FN) { FileName = FN; }
void setDirectory(const std::string &D) { Directory = D; }
void setProducer(const std::string &P) { Producer = P; }
// FIXME - Need translation unit getter/setter.
// Implement isa/cast/dyncast.
static bool classof(const CompileUnitDesc *) { return true; }
static bool classof(const DebugInfoDesc *D);
/// ApplyToFields - Target the visitor to the fields of the CompileUnitDesc.
///
virtual void ApplyToFields(DIVisitor *Visitor);
/// getDescString - Return a string used to compose global names and labels.
///
virtual const char *getDescString() const;
/// getTypeString - Return a string used to label this descriptor's type.
///
virtual const char *getTypeString() const;
/// getAnchorString - Return a string used to label this descriptor's anchor.
///
static const char *const AnchorString;
virtual const char *getAnchorString() const;
#ifndef NDEBUG
virtual void dump();
#endif
};
//===----------------------------------------------------------------------===//
/// TypeDesc - This class packages debug information associated with a type.
///
class TypeDesc : public DebugInfoDesc {
private:
enum {
FlagPrivate = 1 << 0,
FlagProtected = 1 << 1
};
DebugInfoDesc *Context; // Context debug descriptor.
std::string Name; // Type name (may be empty.)
DebugInfoDesc *File; // Defined compile unit (may be NULL.)
unsigned Line; // Defined line# (may be zero.)
uint64_t Size; // Type bit size (may be zero.)
uint64_t Align; // Type bit alignment (may be zero.)
uint64_t Offset; // Type bit offset (may be zero.)
unsigned Flags; // Miscellaneous flags.
public:
explicit TypeDesc(unsigned T);
// Accessors
DebugInfoDesc *getContext() const { return Context; }
const std::string &getName() const { return Name; }
CompileUnitDesc *getFile() const {
return static_cast<CompileUnitDesc *>(File);
}
unsigned getLine() const { return Line; }
uint64_t getSize() const { return Size; }
uint64_t getAlign() const { return Align; }
uint64_t getOffset() const { return Offset; }
bool isPrivate() const {
return (Flags & FlagPrivate) != 0;
}
bool isProtected() const {
return (Flags & FlagProtected) != 0;
}
void setContext(DebugInfoDesc *C) { Context = C; }
void setName(const std::string &N) { Name = N; }
void setFile(CompileUnitDesc *U) {
File = static_cast<DebugInfoDesc *>(U);
}
void setLine(unsigned L) { Line = L; }
void setSize(uint64_t S) { Size = S; }
void setAlign(uint64_t A) { Align = A; }
void setOffset(uint64_t O) { Offset = O; }
void setIsPrivate() { Flags |= FlagPrivate; }
void setIsProtected() { Flags |= FlagProtected; }
/// ApplyToFields - Target the visitor to the fields of the TypeDesc.
///
virtual void ApplyToFields(DIVisitor *Visitor);
/// getDescString - Return a string used to compose global names and labels.
///
virtual const char *getDescString() const;
/// getTypeString - Return a string used to label this descriptor's type.
///
virtual const char *getTypeString() const;
#ifndef NDEBUG
virtual void dump();
#endif
};
//===----------------------------------------------------------------------===//
/// BasicTypeDesc - This class packages debug information associated with a
/// basic type (eg. int, bool, double.)
class BasicTypeDesc : public TypeDesc {
private:
unsigned Encoding; // Type encoding.
public:
BasicTypeDesc();
// Accessors
unsigned getEncoding() const { return Encoding; }
void setEncoding(unsigned E) { Encoding = E; }
// Implement isa/cast/dyncast.
static bool classof(const BasicTypeDesc *) { return true; }
static bool classof(const DebugInfoDesc *D);
/// ApplyToFields - Target the visitor to the fields of the BasicTypeDesc.
///
virtual void ApplyToFields(DIVisitor *Visitor);
/// getDescString - Return a string used to compose global names and labels.
///
virtual const char *getDescString() const;
/// getTypeString - Return a string used to label this descriptor's type.
///
virtual const char *getTypeString() const;
#ifndef NDEBUG
virtual void dump();
#endif
};
//===----------------------------------------------------------------------===//
/// DerivedTypeDesc - This class packages debug information associated with a
/// derived types (eg., typedef, pointer, reference.)
class DerivedTypeDesc : public TypeDesc {
private:
DebugInfoDesc *FromType; // Type derived from.
public:
explicit DerivedTypeDesc(unsigned T);
// Accessors
TypeDesc *getFromType() const {
return static_cast<TypeDesc *>(FromType);
}
void setFromType(TypeDesc *F) {
FromType = static_cast<DebugInfoDesc *>(F);
}
// Implement isa/cast/dyncast.
static bool classof(const DerivedTypeDesc *) { return true; }
static bool classof(const DebugInfoDesc *D);
/// ApplyToFields - Target the visitor to the fields of the DerivedTypeDesc.
///
virtual void ApplyToFields(DIVisitor *Visitor);
/// getDescString - Return a string used to compose global names and labels.
///
virtual const char *getDescString() const;
/// getTypeString - Return a string used to label this descriptor's type.
///
virtual const char *getTypeString() const;
#ifndef NDEBUG
virtual void dump();
#endif
};
//===----------------------------------------------------------------------===//
/// CompositeTypeDesc - This class packages debug information associated with a
/// array/struct types (eg., arrays, struct, union, enums.)
class CompositeTypeDesc : public DerivedTypeDesc {
private:
std::vector<DebugInfoDesc *> Elements;// Information used to compose type.
public:
explicit CompositeTypeDesc(unsigned T);
// Accessors
std::vector<DebugInfoDesc *> &getElements() { return Elements; }
// Implement isa/cast/dyncast.
static bool classof(const CompositeTypeDesc *) { return true; }
static bool classof(const DebugInfoDesc *D);
/// ApplyToFields - Target the visitor to the fields of the CompositeTypeDesc.
///
virtual void ApplyToFields(DIVisitor *Visitor);
/// getDescString - Return a string used to compose global names and labels.
///
virtual const char *getDescString() const;
/// getTypeString - Return a string used to label this descriptor's type.
///
virtual const char *getTypeString() const;
#ifndef NDEBUG
virtual void dump();
#endif
};
//===----------------------------------------------------------------------===//
/// SubrangeDesc - This class packages debug information associated with integer
/// value ranges.
class SubrangeDesc : public DebugInfoDesc {
private:
int64_t Lo; // Low value of range.
int64_t Hi; // High value of range.
public:
SubrangeDesc();
// Accessors
int64_t getLo() const { return Lo; }
int64_t getHi() const { return Hi; }
void setLo(int64_t L) { Lo = L; }
void setHi(int64_t H) { Hi = H; }
// Implement isa/cast/dyncast.
static bool classof(const SubrangeDesc *) { return true; }
static bool classof(const DebugInfoDesc *D);
/// ApplyToFields - Target the visitor to the fields of the SubrangeDesc.
///
virtual void ApplyToFields(DIVisitor *Visitor);
/// getDescString - Return a string used to compose global names and labels.
///
virtual const char *getDescString() const;
/// getTypeString - Return a string used to label this descriptor's type.
///
virtual const char *getTypeString() const;
#ifndef NDEBUG
virtual void dump();
#endif
};
//===----------------------------------------------------------------------===//
/// EnumeratorDesc - This class packages debug information associated with
/// named integer constants.
class EnumeratorDesc : public DebugInfoDesc {
private:
std::string Name; // Enumerator name.
int64_t Value; // Enumerator value.
public:
EnumeratorDesc();
// Accessors
const std::string &getName() const { return Name; }
int64_t getValue() const { return Value; }
void setName(const std::string &N) { Name = N; }
void setValue(int64_t V) { Value = V; }
// Implement isa/cast/dyncast.
static bool classof(const EnumeratorDesc *) { return true; }
static bool classof(const DebugInfoDesc *D);
/// ApplyToFields - Target the visitor to the fields of the EnumeratorDesc.
///
virtual void ApplyToFields(DIVisitor *Visitor);
/// getDescString - Return a string used to compose global names and labels.
///
virtual const char *getDescString() const;
/// getTypeString - Return a string used to label this descriptor's type.
///
virtual const char *getTypeString() const;
#ifndef NDEBUG
virtual void dump();
#endif
};
//===----------------------------------------------------------------------===//
/// VariableDesc - This class packages debug information associated with a
/// subprogram variable.
///
class VariableDesc : public DebugInfoDesc {
private:
DebugInfoDesc *Context; // Context debug descriptor.
std::string Name; // Type name (may be empty.)
DebugInfoDesc *File; // Defined compile unit (may be NULL.)
unsigned Line; // Defined line# (may be zero.)
DebugInfoDesc *TyDesc; // Type of variable.
public:
explicit VariableDesc(unsigned T);
// Accessors
DebugInfoDesc *getContext() const { return Context; }
const std::string &getName() const { return Name; }
CompileUnitDesc *getFile() const {
return static_cast<CompileUnitDesc *>(File);
}
unsigned getLine() const { return Line; }
TypeDesc *getType() const {
return static_cast<TypeDesc *>(TyDesc);
}
void setContext(DebugInfoDesc *C) { Context = C; }
void setName(const std::string &N) { Name = N; }
void setFile(CompileUnitDesc *U) {
File = static_cast<DebugInfoDesc *>(U);
}
void setLine(unsigned L) { Line = L; }
void setType(TypeDesc *T) {
TyDesc = static_cast<DebugInfoDesc *>(T);
}
// Implement isa/cast/dyncast.
static bool classof(const VariableDesc *) { return true; }
static bool classof(const DebugInfoDesc *D);
/// ApplyToFields - Target the visitor to the fields of the VariableDesc.
///
virtual void ApplyToFields(DIVisitor *Visitor);
/// getDescString - Return a string used to compose global names and labels.
///
virtual const char *getDescString() const;
/// getTypeString - Return a string used to label this descriptor's type.
///
virtual const char *getTypeString() const;
#ifndef NDEBUG
virtual void dump();
#endif
};
//===----------------------------------------------------------------------===//
/// GlobalDesc - This class is the base descriptor for global functions and
/// variables.
class GlobalDesc : public AnchoredDesc {
private:
DebugInfoDesc *Context; // Context debug descriptor.
std::string Name; // Global name.
std::string FullName; // Fully qualified name.
std::string LinkageName; // Name for binding to MIPS linkage.
DebugInfoDesc *File; // Defined compile unit (may be NULL.)
unsigned Line; // Defined line# (may be zero.)
DebugInfoDesc *TyDesc; // Type debug descriptor.
bool IsStatic; // Is the global a static.
bool IsDefinition; // Is the global defined in context.
protected:
explicit GlobalDesc(unsigned T);
public:
// Accessors
DebugInfoDesc *getContext() const { return Context; }
const std::string &getName() const { return Name; }
const std::string &getFullName() const { return FullName; }
const std::string &getLinkageName() const { return LinkageName; }
CompileUnitDesc *getFile() const {
return static_cast<CompileUnitDesc *>(File);
}
unsigned getLine() const { return Line; }
TypeDesc *getType() const {
return static_cast<TypeDesc *>(TyDesc);
}
bool isStatic() const { return IsStatic; }
bool isDefinition() const { return IsDefinition; }
void setContext(DebugInfoDesc *C) { Context = C; }
void setName(const std::string &N) { Name = N; }
void setFullName(const std::string &N) { FullName = N; }
void setLinkageName(const std::string &N) { LinkageName = N; }
void setFile(CompileUnitDesc *U) {
File = static_cast<DebugInfoDesc *>(U);
}
void setLine(unsigned L) { Line = L; }
void setType(TypeDesc *T) {
TyDesc = static_cast<DebugInfoDesc *>(T);
}
void setIsStatic(bool IS) { IsStatic = IS; }
void setIsDefinition(bool ID) { IsDefinition = ID; }
/// ApplyToFields - Target the visitor to the fields of the GlobalDesc.
///
virtual void ApplyToFields(DIVisitor *Visitor);
};
//===----------------------------------------------------------------------===//
/// GlobalVariableDesc - This class packages debug information associated with a
/// GlobalVariable.
class GlobalVariableDesc : public GlobalDesc {
private:
GlobalVariable *Global; // llvm global.
public:
GlobalVariableDesc();
// Accessors.
GlobalVariable *getGlobalVariable() const { return Global; }
void setGlobalVariable(GlobalVariable *GV) { Global = GV; }
// Implement isa/cast/dyncast.
static bool classof(const GlobalVariableDesc *) { return true; }
static bool classof(const DebugInfoDesc *D);
/// ApplyToFields - Target the visitor to the fields of the
/// GlobalVariableDesc.
virtual void ApplyToFields(DIVisitor *Visitor);
/// getDescString - Return a string used to compose global names and labels.
///
virtual const char *getDescString() const;
/// getTypeString - Return a string used to label this descriptor's type.
///
virtual const char *getTypeString() const;
/// getAnchorString - Return a string used to label this descriptor's anchor.
///
static const char *const AnchorString;
virtual const char *getAnchorString() const;
#ifndef NDEBUG
virtual void dump();
#endif
};
//===----------------------------------------------------------------------===//
/// SubprogramDesc - This class packages debug information associated with a
/// subprogram/function.
class SubprogramDesc : public GlobalDesc {
private:
public:
SubprogramDesc();
// Accessors
// Implement isa/cast/dyncast.
static bool classof(const SubprogramDesc *) { return true; }
static bool classof(const DebugInfoDesc *D);
/// ApplyToFields - Target the visitor to the fields of the SubprogramDesc.
///
virtual void ApplyToFields(DIVisitor *Visitor);
/// getDescString - Return a string used to compose global names and labels.
///
virtual const char *getDescString() const;
/// getTypeString - Return a string used to label this descriptor's type.
///
virtual const char *getTypeString() const;
/// getAnchorString - Return a string used to label this descriptor's anchor.
///
static const char *const AnchorString;
virtual const char *getAnchorString() const;
#ifndef NDEBUG
virtual void dump();
#endif
};
//===----------------------------------------------------------------------===//
/// BlockDesc - This descriptor groups variables and blocks nested in a block.
///
class BlockDesc : public DebugInfoDesc {
private:
DebugInfoDesc *Context; // Context debug descriptor.
public:
BlockDesc();
// Accessors
DebugInfoDesc *getContext() const { return Context; }
void setContext(DebugInfoDesc *C) { Context = C; }
// Implement isa/cast/dyncast.
static bool classof(const BlockDesc *) { return true; }
static bool classof(const DebugInfoDesc *D);
/// ApplyToFields - Target the visitor to the fields of the BlockDesc.
///
virtual void ApplyToFields(DIVisitor *Visitor);
/// getDescString - Return a string used to compose global names and labels.
///
virtual const char *getDescString() const;
/// getTypeString - Return a string used to label this descriptor's type.
///
virtual const char *getTypeString() const;
#ifndef NDEBUG
virtual void dump();
#endif
};
//===----------------------------------------------------------------------===//
/// DIDeserializer - This class is responsible for casting GlobalVariables
/// into DebugInfoDesc objects.
class DIDeserializer {
private:
std::map<GlobalVariable *, DebugInfoDesc *> GlobalDescs;
// Previously defined gloabls.
public:
DIDeserializer() {}
~DIDeserializer() {}
const std::map<GlobalVariable *, DebugInfoDesc *> &getGlobalDescs() const {
return GlobalDescs;
}
/// Deserialize - Reconstitute a GlobalVariable into it's component
/// DebugInfoDesc objects.
DebugInfoDesc *Deserialize(Value *V);
DebugInfoDesc *Deserialize(GlobalVariable *GV);
};
//===----------------------------------------------------------------------===//
/// DISerializer - This class is responsible for casting DebugInfoDesc objects
/// into GlobalVariables.
class DISerializer {
private:
Module *M; // Definition space module.
PointerType *StrPtrTy; // A "i8*" type. Created lazily.
PointerType *EmptyStructPtrTy; // A "{ }*" type. Created lazily.
std::map<unsigned, StructType *> TagTypes;
// Types per Tag. Created lazily.
std::map<DebugInfoDesc *, GlobalVariable *> DescGlobals;
// Previously defined descriptors.
std::map<const std::string, Constant *> StringCache;
// Previously defined strings.
public:
DISerializer()
: M(NULL)
, StrPtrTy(NULL)
, EmptyStructPtrTy(NULL)
, TagTypes()
, DescGlobals()
, StringCache()
{}
~DISerializer() {}
// Accessors
Module *getModule() const { return M; };
void setModule(Module *module) { M = module; }
/// getStrPtrType - Return a "i8*" type.
///
const PointerType *getStrPtrType();
/// getEmptyStructPtrType - Return a "{ }*" type.
///
const PointerType *getEmptyStructPtrType();
/// getTagType - Return the type describing the specified descriptor (via
/// tag.)
const StructType *getTagType(DebugInfoDesc *DD);
/// getString - Construct the string as constant string global.
///
Constant *getString(const std::string &String);
/// Serialize - Recursively cast the specified descriptor into a
/// GlobalVariable so that it can be serialized to a .bc or .ll file.
GlobalVariable *Serialize(DebugInfoDesc *DD);
/// addDescriptor - Directly connect DD with existing GV.
void addDescriptor(DebugInfoDesc *DD, GlobalVariable *GV);
};
//===----------------------------------------------------------------------===//
/// DIVerifier - This class is responsible for verifying the given network of
/// GlobalVariables are valid as DebugInfoDesc objects.
class DIVerifier {
private:
enum {
Unknown = 0,
Invalid,
Valid
};
std::map<GlobalVariable *, unsigned> Validity;// Tracks prior results.
std::map<unsigned, unsigned> Counts; // Count of fields per Tag type.
public:
DIVerifier()
: Validity()
, Counts()
{}
~DIVerifier() {}
/// Verify - Return true if the GlobalVariable appears to be a valid
/// serialization of a DebugInfoDesc.
bool Verify(Value *V);
bool Verify(GlobalVariable *GV);
/// isVerified - Return true if the specified GV has already been
/// verified as a debug information descriptor.
bool isVerified(GlobalVariable *GV);
};
//===----------------------------------------------------------------------===//
/// SourceLineInfo - This class is used to record source line correspondence.
///
class SourceLineInfo {
private:
unsigned Line; // Source line number.
unsigned Column; // Source column.
unsigned SourceID; // Source ID number.
unsigned LabelID; // Label in code ID number.
public:
SourceLineInfo(unsigned L, unsigned C, unsigned S, unsigned I)
: Line(L), Column(C), SourceID(S), LabelID(I) {}
// Accessors
unsigned getLine() const { return Line; }
unsigned getColumn() const { return Column; }
unsigned getSourceID() const { return SourceID; }
unsigned getLabelID() const { return LabelID; }
};
//===----------------------------------------------------------------------===//
/// SourceFileInfo - This class is used to track source information.
///
class SourceFileInfo {
private:
unsigned DirectoryID; // Directory ID number.
std::string Name; // File name (not including directory.)
public:
SourceFileInfo(unsigned D, const std::string &N) : DirectoryID(D), Name(N) {}
// Accessors
unsigned getDirectoryID() const { return DirectoryID; }
const std::string &getName() const { return Name; }
/// operator== - Used by UniqueVector to locate entry.
///
bool operator==(const SourceFileInfo &SI) const {
return getDirectoryID() == SI.getDirectoryID() && getName() == SI.getName();
}
/// operator< - Used by UniqueVector to locate entry.
///
bool operator<(const SourceFileInfo &SI) const {
return getDirectoryID() < SI.getDirectoryID() ||
(getDirectoryID() == SI.getDirectoryID() && getName() < SI.getName());
}
};
//===----------------------------------------------------------------------===//
/// DebugVariable - This class is used to track local variable information.
///
class DebugVariable {
private:
VariableDesc *Desc; // Variable Descriptor.
unsigned FrameIndex; // Variable frame index.
public:
DebugVariable(VariableDesc *D, unsigned I)
: Desc(D)
, FrameIndex(I)
{}
// Accessors.
VariableDesc *getDesc() const { return Desc; }
unsigned getFrameIndex() const { return FrameIndex; }
};
//===----------------------------------------------------------------------===//
/// DebugScope - This class is used to track scope information.
///
class DebugScope {
private:
DebugScope *Parent; // Parent to this scope.
DebugInfoDesc *Desc; // Debug info descriptor for scope.
// Either subprogram or block.
unsigned StartLabelID; // Label ID of the beginning of scope.
unsigned EndLabelID; // Label ID of the end of scope.
std::vector<DebugScope *> Scopes; // Scopes defined in scope.
std::vector<DebugVariable *> Variables;// Variables declared in scope.
public:
DebugScope(DebugScope *P, DebugInfoDesc *D)
: Parent(P)
, Desc(D)
, StartLabelID(0)
, EndLabelID(0)
, Scopes()
, Variables()
{}
~DebugScope();
// Accessors.
DebugScope *getParent() const { return Parent; }
DebugInfoDesc *getDesc() const { return Desc; }
unsigned getStartLabelID() const { return StartLabelID; }
unsigned getEndLabelID() const { return EndLabelID; }
std::vector<DebugScope *> &getScopes() { return Scopes; }
std::vector<DebugVariable *> &getVariables() { return Variables; }
void setStartLabelID(unsigned S) { StartLabelID = S; }
void setEndLabelID(unsigned E) { EndLabelID = E; }
/// AddScope - Add a scope to the scope.
///
void AddScope(DebugScope *S) { Scopes.push_back(S); }
/// AddVariable - Add a variable to the scope.
///
void AddVariable(DebugVariable *V) { Variables.push_back(V); }
};
//===----------------------------------------------------------------------===//
/// LandingPadInfo - This structure is used to retain landing pad info for
/// the current function.
///
struct LandingPadInfo {
MachineBasicBlock *LandingPadBlock; // Landing pad block.
SmallVector<unsigned, 1> BeginLabels; // Labels prior to invoke.
SmallVector<unsigned, 1> EndLabels; // Labels after invoke.
unsigned LandingPadLabel; // Label at beginning of landing pad.
Function *Personality; // Personality function.
std::vector<int> TypeIds; // List of type ids (filters negative)
explicit LandingPadInfo(MachineBasicBlock *MBB)
: LandingPadBlock(MBB)
, LandingPadLabel(0)
, Personality(NULL)
{}
};
//===----------------------------------------------------------------------===//
/// MachineModuleInfo - This class contains meta information specific to a
/// module. Queries can be made by different debugging and exception handling
/// schemes and reformated for specific use.
///
class MachineModuleInfo : public ImmutablePass {
private:
// Use the same deserializer/verifier for the module.
DIDeserializer DR;
DIVerifier VR;
// CompileUnits - Uniquing vector for compile units.
UniqueVector<CompileUnitDesc *> CompileUnits;
// Directories - Uniquing vector for directories.
UniqueVector<std::string> Directories;
// SourceFiles - Uniquing vector for source files.
UniqueVector<SourceFileInfo> SourceFiles;
// Lines - List of of source line correspondence.
std::vector<SourceLineInfo> Lines;
// LabelIDList - One entry per assigned label. Normally the entry is equal to
// the list index(+1). If the entry is zero then the label has been deleted.
// Any other value indicates the label has been deleted by is mapped to
// another label.
std::vector<unsigned> LabelIDList;
// ScopeMap - Tracks the scopes in the current function.
std::map<DebugInfoDesc *, DebugScope *> ScopeMap;
// RootScope - Top level scope for the current function.
//
DebugScope *RootScope;
// FrameMoves - List of moves done by a function's prolog. Used to construct
// frame maps by debug and exception handling consumers.
std::vector<MachineMove> FrameMoves;
// LandingPads - List of LandingPadInfo describing the landing pad information
// in the current function.
std::vector<LandingPadInfo> LandingPads;
// TypeInfos - List of C++ TypeInfo used in the current function.
//
std::vector<GlobalVariable *> TypeInfos;
// FilterIds - List of typeids encoding filters used in the current function.
//
std::vector<unsigned> FilterIds;
// FilterEnds - List of the indices in FilterIds corresponding to filter
// terminators.
//
std::vector<unsigned> FilterEnds;
// Personalities - Vector of all personality functions ever seen. Used to emit
// common EH frames.
std::vector<Function *> Personalities;
// UsedFunctions - the functions in the llvm.used list in a more easily
// searchable format.
SmallPtrSet<const Function *, 32> UsedFunctions;
bool CallsEHReturn;
bool CallsUnwindInit;
public:
static char ID; // Pass identification, replacement for typeid
MachineModuleInfo();
~MachineModuleInfo();
/// doInitialization - Initialize the state for a new module.
///
bool doInitialization();
/// doFinalization - Tear down the state after completion of a module.
///
bool doFinalization();
/// BeginFunction - Begin gathering function meta information.
///
void BeginFunction(MachineFunction *MF);
/// EndFunction - Discard function meta information.
///
void EndFunction();
/// getDescFor - Convert a Value to a debug information descriptor.
///
// FIXME - use new Value type when available.
DebugInfoDesc *getDescFor(Value *V);
/// Verify - Verify that a Value is debug information descriptor.
///
bool Verify(Value *V) { return VR.Verify(V); }
/// isVerified - Return true if the specified GV has already been
/// verified as a debug information descriptor.
bool isVerified(GlobalVariable *GV) { return VR.isVerified(GV); }
/// AnalyzeModule - Scan the module for global debug information.
///
void AnalyzeModule(Module &M);
/// hasDebugInfo - Returns true if valid debug info is present.
///
bool hasDebugInfo() const { return !CompileUnits.empty(); }
bool callsEHReturn() const { return CallsEHReturn; }
void setCallsEHReturn(bool b) { CallsEHReturn = b; }
bool callsUnwindInit() const { return CallsUnwindInit; }
void setCallsUnwindInit(bool b) { CallsUnwindInit = b; }
/// NextLabelID - Return the next unique label id.
///
unsigned NextLabelID() {
unsigned ID = LabelIDList.size() + 1;
LabelIDList.push_back(ID);
return ID;
}
/// RecordSourceLine - Records location information and associates it with a
/// label. Returns a unique label ID used to generate a label and
/// provide correspondence to the source line list.
unsigned RecordSourceLine(unsigned Line, unsigned Column, unsigned Source);
/// InvalidateLabel - Inhibit use of the specified label # from
/// MachineModuleInfo, for example because the code was deleted.
void InvalidateLabel(unsigned LabelID) {
// Remap to zero to indicate deletion.
RemapLabel(LabelID, 0);
}
/// RemapLabel - Indicate that a label has been merged into another.
///
void RemapLabel(unsigned OldLabelID, unsigned NewLabelID) {
assert(0 < OldLabelID && OldLabelID <= LabelIDList.size() &&
"Old label ID out of range.");
assert(NewLabelID <= LabelIDList.size() &&
"New label ID out of range.");
LabelIDList[OldLabelID - 1] = NewLabelID;
}
/// MappedLabel - Find out the label's final ID. Zero indicates deletion.
/// ID != Mapped ID indicates that the label was folded into another label.
unsigned MappedLabel(unsigned LabelID) const {
assert(LabelID <= LabelIDList.size() && "Debug label ID out of range.");
return LabelID ? LabelIDList[LabelID - 1] : 0;
}
/// RecordSource - Register a source file with debug info. Returns an source
/// ID.
unsigned RecordSource(const std::string &Directory,
const std::string &Source);
unsigned RecordSource(const CompileUnitDesc *CompileUnit);
/// getDirectories - Return the UniqueVector of std::string representing
/// directories.
const UniqueVector<std::string> &getDirectories() const {
return Directories;
}
/// getSourceFiles - Return the UniqueVector of source files.
///
const UniqueVector<SourceFileInfo> &getSourceFiles() const {
return SourceFiles;
}
/// getSourceLines - Return a vector of source lines.
///
const std::vector<SourceLineInfo> &getSourceLines() const {
return Lines;
}
/// SetupCompileUnits - Set up the unique vector of compile units.
///
void SetupCompileUnits(Module &M);
/// getCompileUnits - Return a vector of debug compile units.
///
const UniqueVector<CompileUnitDesc *> getCompileUnits() const;
/// getGlobalVariablesUsing - Return all of the GlobalVariables that use the
/// named GlobalVariable.
std::vector<GlobalVariable*>
getGlobalVariablesUsing(Module &M, const std::string &RootName);
/// getAnchoredDescriptors - Return a vector of anchored debug descriptors.
///
template <class T>std::vector<T *> getAnchoredDescriptors(Module &M) {
T Desc;
std::vector<GlobalVariable *> Globals =
getGlobalVariablesUsing(M, Desc.getAnchorString());
std::vector<T *> AnchoredDescs;
for (unsigned i = 0, N = Globals.size(); i < N; ++i) {
GlobalVariable *GV = Globals[i];
// FIXME - In the short term, changes are too drastic to continue.
if (DebugInfoDesc::TagFromGlobal(GV) == Desc.getTag() &&
DebugInfoDesc::VersionFromGlobal(GV) == LLVMDebugVersion) {
AnchoredDescs.push_back(cast<T>(DR.Deserialize(GV)));
}
}
return AnchoredDescs;
}
/// RecordRegionStart - Indicate the start of a region.
///
unsigned RecordRegionStart(Value *V);
/// RecordRegionEnd - Indicate the end of a region.
///
unsigned RecordRegionEnd(Value *V);
/// RecordVariable - Indicate the declaration of a local variable.
///
void RecordVariable(GlobalValue *GV, unsigned FrameIndex);
/// getRootScope - Return current functions root scope.
///
DebugScope *getRootScope() { return RootScope; }
/// getOrCreateScope - Returns the scope associated with the given descriptor.
///
DebugScope *getOrCreateScope(DebugInfoDesc *ScopeDesc);
/// getFrameMoves - Returns a reference to a list of moves done in the current
/// function's prologue. Used to construct frame maps for debug and exception
/// handling comsumers.
std::vector<MachineMove> &getFrameMoves() { return FrameMoves; }
//===-EH-----------------------------------------------------------------===//
/// getOrCreateLandingPadInfo - Find or create an LandingPadInfo for the
/// specified MachineBasicBlock.
LandingPadInfo &getOrCreateLandingPadInfo(MachineBasicBlock *LandingPad);
/// addInvoke - Provide the begin and end labels of an invoke style call and
/// associate it with a try landing pad block.
void addInvoke(MachineBasicBlock *LandingPad, unsigned BeginLabel,
unsigned EndLabel);
/// addLandingPad - Add a new panding pad. Returns the label ID for the
/// landing pad entry.
unsigned addLandingPad(MachineBasicBlock *LandingPad);
/// addPersonality - Provide the personality function for the exception
/// information.
void addPersonality(MachineBasicBlock *LandingPad, Function *Personality);
/// getPersonalityIndex - Get index of the current personality function inside
/// Personalitites array
unsigned getPersonalityIndex() const;
/// getPersonalities - Return array of personality functions ever seen.
const std::vector<Function *>& getPersonalities() const {
return Personalities;
}
// UsedFunctions - Return set of the functions in the llvm.used list.
const SmallPtrSet<const Function *, 32>& getUsedFunctions() const {
return UsedFunctions;
}
/// addCatchTypeInfo - Provide the catch typeinfo for a landing pad.
///
void addCatchTypeInfo(MachineBasicBlock *LandingPad,
std::vector<GlobalVariable *> &TyInfo);
/// addFilterTypeInfo - Provide the filter typeinfo for a landing pad.
///
void addFilterTypeInfo(MachineBasicBlock *LandingPad,
std::vector<GlobalVariable *> &TyInfo);
There is an impedance matching problem between LLVM and gcc exception handling: if an exception unwinds through an invoke, then execution must branch to the invoke's unwind target. We previously tried to enforce this by appending a cleanup action to every selector, however this does not always work correctly due to an optimization in the C++ unwinding runtime: if only cleanups would be run while unwinding an exception, then the program just terminates without actually executing the cleanups, as invoke semantics would require. I was hoping this wouldn't be a problem, but in fact it turns out to be the cause of all the remaining failures in the LLVM testsuite (these also fail with -enable-correct-eh-support, so turning on -enable-eh didn't make things worse!). Instead we need to append a full-blown catch-all to the end of each selector. The correct way of doing this depends on the personality function, i.e. it is language dependent, so can only be done by gcc. Thus this patch which generalizes the eh.selector intrinsic so that it can handle all possible kinds of action table entries (before it didn't accomodate cleanups): now 0 indicates a cleanup, and filters have to be specified using the number of type infos plus one rather than the number of type infos. Related gcc patches will cause Ada to pass a cleanup (0) to force the selector to always fire, while C++ will use a C++ catch-all (null). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41484 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-27 15:47:50 +00:00
/// addCleanup - Add a cleanup action for a landing pad.
///
void addCleanup(MachineBasicBlock *LandingPad);
/// getTypeIDFor - Return the type id for the specified typeinfo. This is
/// function wide.
unsigned getTypeIDFor(GlobalVariable *TI);
/// getFilterIDFor - Return the id of the filter encoded by TyIds. This is
/// function wide.
int getFilterIDFor(std::vector<unsigned> &TyIds);
/// TidyLandingPads - Remap landing pad labels and remove any deleted landing
/// pads.
void TidyLandingPads();
/// getLandingPads - Return a reference to the landing pad info for the
/// current function.
const std::vector<LandingPadInfo> &getLandingPads() const {
return LandingPads;
}
/// getTypeInfos - Return a reference to the C++ typeinfo for the current
/// function.
const std::vector<GlobalVariable *> &getTypeInfos() const {
return TypeInfos;
}
/// getFilterIds - Return a reference to the typeids encoding filters used in
/// the current function.
const std::vector<unsigned> &getFilterIds() const {
return FilterIds;
}
/// getPersonality - Return a personality function if available. The presence
/// of one is required to emit exception handling info.
Function *getPersonality() const;
DIDeserializer *getDIDeserializer() { return &DR; }
}; // End class MachineModuleInfo
} // End llvm namespace
#endif