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Code Issues Projects Releases Wiki Activity

Changing model for the construction of debug information.

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llvm-svn: 26016
This commit is contained in:
Jim Laskey 2006-02-06 15:33:21 +00:00
parent 62908083eb
commit e27947e8fb
4 changed files with 979 additions and 228 deletions
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4
include/llvm/CodeGen/DwarfWriter.h
View File

@ -33,7 +33,7 @@ namespace llvm {
// Forward declarations.
//
class AsmPrinter;
class CompileUnitWrapper;
class CompileUnitDesc;
class DIE;
class DwarfWriter;
class DWContext;
@ -657,7 +657,7 @@ private:
/// NewCompileUnit - Create new compile unit information.
///
DIE *NewCompileUnit(const CompileUnitWrapper &CompileUnit);
DIE *NewCompileUnit(const CompileUnitDesc *CompileUnit);
/// EmitInitial - Emit initial Dwarf declarations.
///

433
include/llvm/CodeGen/MachineDebugInfo.h
View File

@ -17,160 +17,385 @@
// The following information can be retrieved from the MachineDebugInfo.
//
// -- Source directories - Directories are uniqued based on their canonical
// string and assigned a sequential numeric ID (base 1.) A directory ID - 1
// provides the index of directory information in a queried directory list.
// 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.) A file ID - 1 provides the
// index of source information in a queried file list.
// ID. A file ID is sequential number (base 1.)
// -- Source line coorespondence - 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
// information emitter to generate labels to map code addressed to debug
// tables.
// emitter to generate labels referenced by degug information tables.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CODEGEN_MACHINEDEBUGINFO_H
#define LLVM_CODEGEN_MACHINEDEBUGINFO_H
#include "llvm/Pass.h"
#include "llvm/Support/Dwarf.h"
#include "llvm/ADT/UniqueVector.h"
#include "llvm/Pass.h"
#include "llvm/User.h"
#include <string>
#include <set>
namespace llvm {
//===----------------------------------------------------------------------===//
// Forward declarations.
class ConstantStruct;
class DebugInfoDesc;
class GlobalVariable;
class Module;
class PointerType;
class StructType;
//===----------------------------------------------------------------------===//
/// DebugInfoWrapper - This class is the base class for debug info wrappers.
// Debug info constants.
enum {
LLVMDebugVersion = 1, // Current version of debug information.
DIInvalid = ~0U, // Invalid result indicator.
// DebugInfoDesc type identifying tags.
// FIXME - Change over with gcc4.
#if 1
DI_TAG_compile_unit = DW_TAG_compile_unit,
DI_TAG_global_variable = DW_TAG_variable,
DI_TAG_subprogram = DW_TAG_subprogram
#else
DI_TAG_compile_unit = 1,
DI_TAG_global_variable,
DI_TAG_subprogram
#endif
};
//===----------------------------------------------------------------------===//
/// DIApplyManager - Subclasses of this class apply steps to each of the fields
/// in the supplied DebugInfoDesc.
class DIApplyManager {
public:
DIApplyManager() {}
virtual ~DIApplyManager() {}
/// ApplyToFields - Target the manager 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(bool &Field) = 0;
virtual void Apply(std::string &Field) = 0;
virtual void Apply(DebugInfoDesc *&Field) = 0;
virtual void Apply(GlobalVariable *&Field) = 0;
};
//===----------------------------------------------------------------------===//
/// DebugInfoDesc - This class is the base class for debug info descriptors.
///
class DebugInfoWrapper {
class DebugInfoDesc {
private:
unsigned Tag; // Content indicator. Dwarf values are
// used but that does not limit use to
// Dwarf writers.
protected:
GlobalVariable *GV; // "llvm.db" global
ConstantStruct *IC; // Initializer constant.
DebugInfoDesc(unsigned T) : Tag(T) {}
public:
DebugInfoWrapper(GlobalVariable *G);
virtual ~DebugInfoDesc() {}
/// getGlobal - Return the "llvm.db" global.
///
GlobalVariable *getGlobal() const { return GV; }
// Accessors
unsigned getTag() const { return Tag; }
/// operator== - Used by Uniquevector to locate entry.
///
bool operator==(const DebugInfoWrapper &DI) const { return IC == DI.IC; }
/// TagFromGlobal - Returns the Tag number from a debug info descriptor
/// GlobalVariable.
static unsigned TagFromGlobal(GlobalVariable *GV, bool Checking = false);
/// operator< - Used by Uniquevector to locate entry.
/// DescFactory - Create an instance of debug info descriptor based on Tag.
/// Return NULL if not a recognized Tag.
static DebugInfoDesc *DescFactory(unsigned Tag);
//===--------------------------------------------------------------------===//
// 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 apply manager to the fields of the descriptor.
///
bool operator<(const DebugInfoWrapper &DI) const { return IC < DI.IC; }
virtual void ApplyToFields(DIApplyManager *Mgr) = 0;
/// TypeString - Return a string used to compose globalnames and labels.
///
virtual const char *TypeString() const = 0;
#ifndef NDEBUG
virtual void dump() = 0;
#endif
};
//===----------------------------------------------------------------------===//
/// CompileUnitWrapper - This class wraps a "lldb.compile_unit" global to
/// provide easy access to its attributes.
class CompileUnitWrapper : public DebugInfoWrapper {
/// CompileUnitDesc - This class packages debug information associated with a
/// source/header file.
class CompileUnitDesc : public DebugInfoDesc {
private:
// Operand indices.
enum {
Tag_op,
Version_op,
Language_op,
FileName_op,
Directory_op,
Producer_op,
Anchor_op, // ignored
N_op
};
unsigned DebugVersion; // LLVM debug version when produced.
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.
GlobalVariable *TransUnit; // Translation unit - ignored.
public:
CompileUnitWrapper(GlobalVariable *G);
CompileUnitDesc()
: DebugInfoDesc(DI_TAG_compile_unit)
, DebugVersion(LLVMDebugVersion)
, Language(0)
, FileName("")
, Directory("")
, Producer("")
, TransUnit(NULL)
{}
/// getGlobal - Return the "lldb.compile_unit" global.
// Accessors
unsigned getDebugVersion() const { return DebugVersion; }
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) {
return D->getTag() == DI_TAG_compile_unit;
}
/// DebugVersionFromGlobal - Returns the version number from a compile unit
/// GlobalVariable.
static unsigned DebugVersionFromGlobal(GlobalVariable *GV,
bool Checking = false);
/// ApplyToFields - Target the apply manager to the fields of the
/// CompileUnitDesc.
virtual void ApplyToFields(DIApplyManager *Mgr);
/// TypeString - Return a string used to compose globalnames and labels.
///
GlobalVariable *getGlobal() const { return GV; }
virtual const char *TypeString() const;
/// getTag - Return the compile unit's tag number. Currently DW_TAG_variable,
/// DW_TAG_subprogram or DW_TAG_compile_unit.
unsigned getTag() const;
/// isCorrectDebugVersion - Return true if is the correct llvm debug version.
/// Currently the value is 0 (zero.) If the value is is not correct then
/// ignore all debug information.
bool isCorrectDebugVersion() const;
/// getLanguage - Return the compile unit's language number (ex. DW_LANG_C89.)
///
unsigned getLanguage() const;
/// getFileName - Return the compile unit's file name.
///
const std::string getFileName() const;
/// getDirectory - Return the compile unit's file directory.
///
const std::string getDirectory() const;
/// getProducer - Return the compile unit's generator name.
///
const std::string getProducer() const;
#ifndef NDEBUG
virtual void dump();
#endif
};
//===----------------------------------------------------------------------===//
/// GlobalWrapper - This class wraps a "lldb.global" global to provide easy
/// access to its attributes.
class GlobalWrapper : public DebugInfoWrapper {
/// GlobalVariableDesc - This class packages debug information associated with a
/// GlobalVariable.
class GlobalVariableDesc : public DebugInfoDesc {
private:
// Operand indices.
enum {
Tag_op,
Context_op,
Name_op,
Anchor_op, // ignored
Type_op,
Static_op,
Definition_op,
GlobalVariable_op,
N_op
};
DebugInfoDesc *Context; // Context debug descriptor.
std::string Name; // Global name.
GlobalVariable *TransUnit; // Translation unit - ignored.
// FIXME - Use a descriptor.
GlobalVariable *TyDesc; // Type debug descriptor.
bool IsStatic; // Is the global a static.
bool IsDefinition; // Is the global defined in context.
GlobalVariable *Global; // llvm global.
public:
GlobalWrapper(GlobalVariable *G);
GlobalVariableDesc()
: DebugInfoDesc(DI_TAG_global_variable)
, Context(0)
, Name("")
, TransUnit(NULL)
, TyDesc(NULL)
, IsStatic(false)
, IsDefinition(false)
, Global(NULL)
{}
/// getGlobal - Return the "lldb.global" global.
// Accessors
DebugInfoDesc *getContext() const { return Context; }
const std::string &getName() const { return Name; }
bool isStatic() const { return IsStatic; }
bool isDefinition() const { return IsDefinition; }
GlobalVariable *getGlobalVariable() const { return Global; }
void setName(const std::string &N) { Name = N; }
void setIsStatic(bool IS) { IsStatic = IS; }
void setIsDefinition(bool ID) { IsDefinition = ID; }
void setGlobalVariable(GlobalVariable *GV) { Global = GV; }
// FIXME - Other getters/setters.
// Implement isa/cast/dyncast.
static bool classof(const GlobalVariableDesc *) { return true; }
static bool classof(const DebugInfoDesc *D) {
return D->getTag() == DI_TAG_global_variable;
}
/// ApplyToFields - Target the apply manager to the fields of the
/// GlobalVariableDesc.
virtual void ApplyToFields(DIApplyManager *Mgr);
/// TypeString - Return a string used to compose globalnames and labels.
///
GlobalVariable *getGlobal() const { return GV; }
virtual const char *TypeString() const;
/// getContext - Return the "lldb.compile_unit" context global.
#ifndef NDEBUG
virtual void dump();
#endif
};
//===----------------------------------------------------------------------===//
/// SubprogramDesc - This class packages debug information associated with a
/// subprogram/function.
class SubprogramDesc : public DebugInfoDesc {
private:
DebugInfoDesc *Context; // Context debug descriptor.
std::string Name; // Subprogram name.
GlobalVariable *TransUnit; // Translation unit - ignored.
// FIXME - Use a descriptor.
GlobalVariable *TyDesc; // Type debug descriptor.
bool IsStatic; // Is the subprogram a static.
bool IsDefinition; // Is the subprogram defined in context.
public:
SubprogramDesc()
: DebugInfoDesc(DI_TAG_subprogram)
, Context(0)
, Name("")
, TransUnit(NULL)
, TyDesc(NULL)
, IsStatic(false)
, IsDefinition(false)
{}
// Accessors
DebugInfoDesc *getContext() const { return Context; }
const std::string &getName() const { return Name; }
bool isStatic() const { return IsStatic; }
bool isDefinition() const { return IsDefinition; }
void setName(const std::string &N) { Name = N; }
void setIsStatic(bool IS) { IsStatic = IS; }
void setIsDefinition(bool ID) { IsDefinition = ID; }
// FIXME - Other getters/setters.
// Implement isa/cast/dyncast.
static bool classof(const SubprogramDesc *) { return true; }
static bool classof(const DebugInfoDesc *D) {
return D->getTag() == DI_TAG_subprogram;
}
/// ApplyToFields - Target the apply manager to the fields of the
/// SubprogramDesc.
virtual void ApplyToFields(DIApplyManager *Mgr);
/// TypeString - Return a string used to compose globalnames and labels.
///
GlobalVariable *getContext() const;
virtual const char *TypeString() const;
/// getTag - Return the global's tag number. Currently should be
/// DW_TAG_variable or DW_TAG_subprogram.
unsigned getTag() const;
#ifndef NDEBUG
virtual void dump();
#endif
};
/// getName - Return the name of the global.
//===----------------------------------------------------------------------===//
/// DIDeserializer - This class is responsible for casting GlobalVariables
/// into DebugInfoDesc objects.
class DIDeserializer {
private:
Module *M; // Definition space module.
unsigned DebugVersion; // Version of debug information in use.
std::map<GlobalVariable *, DebugInfoDesc *> GlobalDescs;
// Previously defined gloabls.
public:
DIDeserializer() : M(NULL), DebugVersion(LLVMDebugVersion) {}
~DIDeserializer() {}
// Accessors
Module *getModule() const { return M; };
void setModule(Module *module) { M = module; }
unsigned getDebugVersion() const { return DebugVersion; }
/// 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 "sbyte *" 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, GlobalVariable*> StringCache;
// Previously defined strings.
public:
DISerializer() : M(NULL) {}
~DISerializer() {}
// Accessors
Module *getModule() const { return M; };
void setModule(Module *module) { M = module; }
/// getStrPtrType - Return a "sbyte *" type.
///
const std::string getName() const;
const PointerType *getStrPtrType();
/// getType - Return the type of the global.
/// getEmptyStructPtrType - Return a "{ }*" type.
///
const GlobalVariable *getType() const;
const PointerType *getEmptyStructPtrType();
/// isStatic - Return true if the global is static.
///
bool isStatic() const;
/// getTagType - Return the type describing the specified descriptor (via
/// tag.)
const StructType *getTagType(DebugInfoDesc *DD);
/// isDefinition - Return true if the global is a definition.
/// getString - Construct the string as constant string global.
///
bool isDefinition() const;
GlobalVariable *getString(const std::string &String);
/// getGlobalVariable - Return the global variable (tag == DW_TAG_variable.)
///
GlobalVariable *getGlobalVariable() const;
/// 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);
};
//===----------------------------------------------------------------------===//
/// DIVerifier - This class is responsible for verifying the given network of
/// GlobalVariables are valid as DebugInfoDesc objects.
class DIVerifier {
private:
unsigned DebugVersion; // Version of debug information in use.
std::set<GlobalVariable *> Visited; // Tracks visits during recursion.
std::map<unsigned, unsigned> Counts; // Count of fields per Tag type.
/// markVisited - Return true if the GlobalVariable hase been "seen" before.
/// Mark markVisited otherwise.
bool markVisited(GlobalVariable *GV);
public:
DIVerifier() : DebugVersion(LLVMDebugVersion) {}
~DIVerifier() {}
/// Verify - Return true if the GlobalVariable appears to be a valid
/// serialization of a DebugInfoDesc.
bool Verify(GlobalVariable *GV);
};
//===----------------------------------------------------------------------===//
@ -228,8 +453,14 @@ public:
///
class MachineDebugInfo : public ImmutablePass {
private:
// Debug indforma
// Use the same serializer/deserializer/verifier for the module.
DISerializer SR;
DIDeserializer DR;
DIVerifier VR;
// CompileUnits - Uniquing vector for compile units.
UniqueVector<CompileUnitWrapper> CompileUnits;
UniqueVector<CompileUnitDesc *> CompileUnits;
// Directories - Uniquing vector for directories.
UniqueVector<std::string> Directories;
@ -300,11 +531,11 @@ public:
/// getCompileUnits - Return a vector of debug compile units.
///
const UniqueVector<CompileUnitWrapper> getCompileUnits() const;
const UniqueVector<CompileUnitDesc *> getCompileUnits() const;
/// getGlobalVariables - Return a vector of debug global variables.
/// getGlobalVariables - Return a vector of debug GlobalVariables.
///
static std::vector<GlobalWrapper> getGlobalVariables(Module &M);
std::vector<GlobalVariableDesc *> getGlobalVariables(Module &M);
}; // End class MachineDebugInfo

22
lib/CodeGen/DwarfWriter.cpp
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@ -1269,16 +1269,16 @@ void DwarfWriter::NewGlobalVariable(DWContext *Context,
/// NewCompileUnit - Create new compile unit information.
///
DIE *DwarfWriter::NewCompileUnit(const CompileUnitWrapper &CompileUnit) {
DIE *DwarfWriter::NewCompileUnit(const CompileUnitDesc *CompileUnit) {
DIE *Unit = new DIE(DW_TAG_compile_unit, DW_CHILDREN_yes);
// FIXME - use the correct line set.
Unit->AddLabel (DW_AT_stmt_list, DW_FORM_data4, DWLabel("line", 0));
Unit->AddLabel (DW_AT_high_pc, DW_FORM_addr, DWLabel("text_end", 0));
Unit->AddLabel (DW_AT_low_pc, DW_FORM_addr, DWLabel("text_begin", 0));
Unit->AddString(DW_AT_producer, DW_FORM_string, CompileUnit.getProducer());
Unit->AddUInt (DW_AT_language, DW_FORM_data1, CompileUnit.getLanguage());
Unit->AddString(DW_AT_name, DW_FORM_string, CompileUnit.getFileName());
Unit->AddString(DW_AT_comp_dir, DW_FORM_string, CompileUnit.getDirectory());
Unit->AddString(DW_AT_producer, DW_FORM_string, CompileUnit->getProducer());
Unit->AddUInt (DW_AT_language, DW_FORM_data1, CompileUnit->getLanguage());
Unit->AddString(DW_AT_name, DW_FORM_string, CompileUnit->getFileName());
Unit->AddString(DW_AT_comp_dir, DW_FORM_string, CompileUnit->getDirectory());
Unit->Complete(*this);
return Unit;
@ -1723,11 +1723,10 @@ void DwarfWriter::EmitDebugMacInfo() {
/// ConstructCompileUnitDIEs - Create a compile unit DIE for each source and
/// header file.
void DwarfWriter::ConstructCompileUnitDIEs() {
const UniqueVector<CompileUnitWrapper> CUW = DebugInfo->getCompileUnits();
const UniqueVector<CompileUnitDesc *> CUW = DebugInfo->getCompileUnits();
for (unsigned i = 1, N = CUW.size(); i <= N; ++i) {
const CompileUnitWrapper &CompileUnit = CUW[i];
DIE *Unit = NewCompileUnit(CompileUnit);
DIE *Unit = NewCompileUnit(CUW[i]);
DWContext *Context = new DWContext(*this, NULL, Unit);
CompileUnits.push_back(Unit);
}
@ -1738,11 +1737,12 @@ void DwarfWriter::ConstructCompileUnitDIEs() {
void DwarfWriter::ConstructGlobalDIEs(Module &M) {
const TargetData &TD = Asm->TM.getTargetData();
std::vector<GlobalWrapper> GlobalVariables = DebugInfo->getGlobalVariables(M);
std::vector<GlobalVariableDesc *> GlobalVariables =
DebugInfo->getGlobalVariables(M);
for (unsigned i = 0, N = GlobalVariables.size(); i < N; ++i) {
GlobalWrapper &GW = GlobalVariables[i];
GlobalVariable *GV = GW.getGlobalVariable();
GlobalVariableDesc *GVD = GlobalVariables[i];
GlobalVariable *GV = GVD->getGlobalVariable();
if (!GV->hasInitializer()) continue; // External global require no code

728
lib/CodeGen/MachineDebugInfo.cpp
View File

@ -11,11 +11,14 @@
#include "llvm/Constants.h"
#include "llvm/DerivedTypes.h"
#include "llvm/GlobalVariable.h"
#include "llvm/Intrinsics.h"
#include "llvm/Instructions.h"
#include "llvm/Module.h"
#include "llvm/Support/Dwarf.h"
#include <iostream>
using namespace llvm;
// Handle the Pass registration stuff necessary to use TargetData's.
@ -25,14 +28,14 @@ namespace {
//===----------------------------------------------------------------------===//
/// getGlobalVariablesUsing - Return all of the global variables which have the
/// getGlobalVariablesUsing - Return all of the GlobalVariables which have the
/// specified value in their initializer somewhere.
static void
getGlobalVariablesUsing(Value *V, std::vector<GlobalVariable*> &Result) {
// Scan though value users.
for (Value::use_iterator I = V->use_begin(), E = V->use_end(); I != E; ++I) {
if (GlobalVariable *GV = dyn_cast<GlobalVariable>(*I)) {
// If the user is a global variable then add to result.
// If the user is a GlobalVariable then add to result.
Result.push_back(GV);
} else if (Constant *C = dyn_cast<Constant>(*I)) {
// If the user is a constant variable then scan its users
@ -41,13 +44,13 @@ getGlobalVariablesUsing(Value *V, std::vector<GlobalVariable*> &Result) {
}
}
/// getGlobalVariablesUsing - Return all of the global variables that use the
/// named global variable.
/// getGlobalVariablesUsing - Return all of the GlobalVariables that use the
/// named GlobalVariable.
static std::vector<GlobalVariable*>
getGlobalVariablesUsing(Module &M, const std::string &RootName) {
std::vector<GlobalVariable*> Result; // Global variables matching criteria.
std::vector<GlobalVariable*> Result; // GlobalVariables matching criteria.
// Get the global variable root.
// Get the GlobalVariable root.
GlobalVariable *UseRoot = M.getGlobalVariable(RootName,
StructType::get(std::vector<const Type*>()));
@ -98,131 +101,646 @@ static const std::string getStringValue(Value *V, unsigned Offset = 0) {
return "";
}
/// isStringValue - Return true if the given value can be coerced to a string.
///
static bool isStringValue(Value *V) {
if (GlobalVariable *GV = dyn_cast<GlobalVariable>(V)) {
if (GV->hasInitializer() && isa<ConstantArray>(GV->getInitializer())) {
ConstantArray *Init = cast<ConstantArray>(GV->getInitializer());
return Init->isString();
}
} else if (Constant *C = dyn_cast<Constant>(V)) {
if (GlobalValue *GV = dyn_cast<GlobalValue>(C))
return isStringValue(GV);
else if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
if (CE->getOpcode() == Instruction::GetElementPtr) {
if (CE->getNumOperands() == 3 &&
cast<Constant>(CE->getOperand(1))->isNullValue() &&
isa<ConstantInt>(CE->getOperand(2))) {
return isStringValue(CE->getOperand(0));
}
}
}
}
return false;
}
/// getGlobalValue - Return either a direct or cast Global value.
///
static GlobalVariable *getGlobalValue(Value *V) {
if (GlobalVariable *GV = dyn_cast<GlobalVariable>(V)) {
return GV;
} else if (ConstantExpr *CE = dyn_cast<ConstantExpr>(V)) {
return CE->getOpcode() == Instruction::Cast ? dyn_cast<GlobalVariable>(V)
: NULL;
if (CE->getOpcode() == Instruction::Cast) {
return dyn_cast<GlobalVariable>(CE->getOperand(0));
}
}
return NULL;
}
/// isGlobalValue - Return true if the given value can be coerced to a
/// GlobalVariable.
static bool isGlobalValue(Value *V) {
if (isa<GlobalVariable>(V) || isa<ConstantPointerNull>(V)) {
return true;
} else if (ConstantExpr *CE = dyn_cast<ConstantExpr>(V)) {
if (CE->getOpcode() == Instruction::Cast) {
return isa<GlobalVariable>(CE->getOperand(0));
}
}
return false;
}
//===----------------------------------------------------------------------===//
/// isUIntOperand - Return true if the ith operand is an unsigned integer.
///
static bool isUIntOperand(GlobalVariable *GV, unsigned i) {
// Make sure the GlobalVariable has an initializer.
if (!GV->hasInitializer()) return false;
DebugInfoWrapper::DebugInfoWrapper(GlobalVariable *G)
: GV(G)
, IC(dyn_cast<ConstantStruct>(GV->getInitializer())) {
assert(IC && "llvm.db.global is missing structured constant");
// Get the initializer constant.
ConstantStruct *CI = dyn_cast<ConstantStruct>(GV->getInitializer());
if (!CI) return false;
// Check if there is at least i + 1 operands.
unsigned N = CI->getNumOperands();
if (i >= N) return false;
// Check constant.
return isa<ConstantUInt>(CI->getOperand(i));
}
//===----------------------------------------------------------------------===//
CompileUnitWrapper::CompileUnitWrapper(GlobalVariable *G)
: DebugInfoWrapper(G)
{
// FIXME - should probably ease up on the number of operands (version.)
assert(IC->getNumOperands() == N_op &&
"Compile unit does not have correct number of operands");
/// TagFromGlobal - Returns the Tag number from a debug info descriptor
/// GlobalVariable.
unsigned DebugInfoDesc::TagFromGlobal(GlobalVariable *GV, bool Checking) {
if (Checking && !isUIntOperand(GV, 0)) return DIInvalid;
ConstantStruct *CI = cast<ConstantStruct>(GV->getInitializer());
Constant *C = CI->getOperand(0);
return cast<ConstantUInt>(C)->getValue();
}
/// getTag - Return the compile unit's tag number. Currently should be
/// DW_TAG_variable.
unsigned CompileUnitWrapper::getTag() const {
return cast<ConstantUInt>(IC->getOperand(Tag_op))->getValue();
}
/// isCorrectDebugVersion - Return true if is the correct llvm debug version.
/// Currently the value is 0 (zero.) If the value is is not correct then
/// ignore all debug information.
bool CompileUnitWrapper::isCorrectDebugVersion() const {
return cast<ConstantUInt>(IC->getOperand(Version_op))->getValue() == 0;
}
/// getLanguage - Return the compile unit's language number (ex. DW_LANG_C89.)
///
unsigned CompileUnitWrapper::getLanguage() const {
return cast<ConstantUInt>(IC->getOperand(Language_op))->getValue();
}
/// getFileName - Return the compile unit's file name.
///
const std::string CompileUnitWrapper::getFileName() const {
return getStringValue(IC->getOperand(FileName_op));
}
/// getDirectory - Return the compile unit's file directory.
///
const std::string CompileUnitWrapper::getDirectory() const {
return getStringValue(IC->getOperand(Directory_op));
}
/// getProducer - Return the compile unit's generator name.
///
const std::string CompileUnitWrapper::getProducer() const {
return getStringValue(IC->getOperand(Producer_op));
/// DescFactory - Create an instance of debug info descriptor based on Tag.
/// Return NULL if not a recognized Tag.
DebugInfoDesc *DebugInfoDesc::DescFactory(unsigned Tag) {
switch (Tag) {
case DI_TAG_compile_unit: return new CompileUnitDesc();
case DI_TAG_global_variable: return new GlobalVariableDesc();
case DI_TAG_subprogram: return new SubprogramDesc();
default: break;
}
return NULL;
}
//===----------------------------------------------------------------------===//
GlobalWrapper::GlobalWrapper(GlobalVariable *G)
: DebugInfoWrapper(G)
{
// FIXME - should probably ease up on the number of operands (version.)
assert(IC->getNumOperands() == N_op &&
"Global does not have correct number of operands");
/// ApplyToFields - Target the manager to each field of the debug information
/// descriptor.
void DIApplyManager::ApplyToFields(DebugInfoDesc *DD) {
DD->ApplyToFields(this);
}
/// getTag - Return the global's tag number. Currently should be
/// DW_TAG_variable or DW_TAG_subprogram.
unsigned GlobalWrapper::getTag() const {
return cast<ConstantUInt>(IC->getOperand(Tag_op))->getValue();
//===----------------------------------------------------------------------===//
/// DICountAppMgr - This DIApplyManager counts all the fields in the supplied
/// debug the supplied DebugInfoDesc.
class DICountAppMgr : public DIApplyManager {
private:
unsigned Count; // Running count of fields.
public:
DICountAppMgr() : DIApplyManager(), Count(1) {}
// Accessors.
unsigned getCount() const { return Count; }
/// Apply - Count each of the fields.
///
virtual void Apply(int &Field) { ++Count; }
virtual void Apply(unsigned &Field) { ++Count; }
virtual void Apply(bool &Field) { ++Count; }
virtual void Apply(std::string &Field) { ++Count; }
virtual void Apply(DebugInfoDesc *&Field) { ++Count; }
virtual void Apply(GlobalVariable *&Field) { ++Count; }
};
//===----------------------------------------------------------------------===//
/// DIDeserializeAppMgr - This DIApplyManager deserializes all the fields in
/// the supplied DebugInfoDesc.
class DIDeserializeAppMgr : public DIApplyManager {
private:
DIDeserializer &DR; // Active deserializer.
unsigned I; // Current operand index.
ConstantStruct *CI; // GlobalVariable constant initializer.
public:
DIDeserializeAppMgr(DIDeserializer &D, GlobalVariable *GV)
: DIApplyManager()
, DR(D)
, I(1)
, CI(cast<ConstantStruct>(GV->getInitializer()))
{}
/// Apply - Set the value of each of the fields.
///
virtual void Apply(int &Field) {
Constant *C = CI->getOperand(I++);
Field = cast<ConstantSInt>(C)->getValue();
}
virtual void Apply(unsigned &Field) {
Constant *C = CI->getOperand(I++);
Field = cast<ConstantUInt>(C)->getValue();
}
virtual void Apply(bool &Field) {
Constant *C = CI->getOperand(I++);
Field = cast<ConstantBool>(C)->getValue();
}
virtual void Apply(std::string &Field) {
Constant *C = CI->getOperand(I++);
Field = getStringValue(C);
}
virtual void Apply(DebugInfoDesc *&Field) {
Constant *C = CI->getOperand(I++);
Field = DR.Deserialize(C);
}
virtual void Apply(GlobalVariable *&Field) {
Constant *C = CI->getOperand(I++);
Field = getGlobalValue(C);
}
};
//===----------------------------------------------------------------------===//
/// DISerializeAppMgr - This DIApplyManager serializes all the fields in
/// the supplied DebugInfoDesc.
class DISerializeAppMgr : public DIApplyManager {
private:
DISerializer &SR; // Active serializer.
std::vector<Constant*> &Elements; // Element accumulator.
public:
DISerializeAppMgr(DISerializer &S, std::vector<Constant*> &E)
: DIApplyManager()
, SR(S)
, Elements(E)
{}
/// Apply - Set the value of each of the fields.
///
virtual void Apply(int &Field) {
Elements.push_back(ConstantUInt::get(Type::IntTy, Field));
}
virtual void Apply(unsigned &Field) {
Elements.push_back(ConstantUInt::get(Type::UIntTy, Field));
}
virtual void Apply(bool &Field) {
Elements.push_back(ConstantBool::get(Field));
}
virtual void Apply(std::string &Field) {
Elements.push_back(SR.getString(Field));
}
virtual void Apply(DebugInfoDesc *&Field) {
GlobalVariable *GV = NULL;
// If non-NULL the convert to global.
if (Field) GV = SR.Serialize(Field);
// FIXME - At some point should use specific type.
const PointerType *EmptyTy = SR.getEmptyStructPtrType();
if (GV) {
// Set to pointer to global.
Elements.push_back(ConstantExpr::getCast(GV, EmptyTy));
} else {
// Use NULL.
Elements.push_back(ConstantPointerNull::get(EmptyTy));
}
}
virtual void Apply(GlobalVariable *&Field) {
const PointerType *EmptyTy = SR.getEmptyStructPtrType();
Elements.push_back(ConstantExpr::getCast(Field, EmptyTy));
}
};
//===----------------------------------------------------------------------===//
/// DIGetTypesAppMgr - This DIApplyManager gathers all the field types in
/// the supplied DebugInfoDesc.
class DIGetTypesAppMgr : public DIApplyManager {
private:
DISerializer &SR; // Active serializer.
std::vector<const Type*> &Fields; // Type accumulator.
public:
DIGetTypesAppMgr(DISerializer &S, std::vector<const Type*> &F)
: DIApplyManager()
, SR(S)
, Fields(F)
{}
/// Apply - Set the value of each of the fields.
///
virtual void Apply(int &Field) {
Fields.push_back(Type::IntTy);
}
virtual void Apply(unsigned &Field) {
Fields.push_back(Type::UIntTy);
}
virtual void Apply(bool &Field) {
Fields.push_back(Type::BoolTy);
}
virtual void Apply(std::string &Field) {
Fields.push_back(SR.getStrPtrType());
}
virtual void Apply(DebugInfoDesc *&Field) {
// FIXME - At some point should use specific type.
const PointerType *EmptyTy = SR.getEmptyStructPtrType();
Fields.push_back(EmptyTy);
}
virtual void Apply(GlobalVariable *&Field) {
const PointerType *EmptyTy = SR.getEmptyStructPtrType();
Fields.push_back(EmptyTy);
}
};
//===----------------------------------------------------------------------===//
/// DIVerifyAppMgr - This DIApplyManager verifies all the field types against
/// a constant initializer.
class DIVerifyAppMgr : public DIApplyManager {
private:
DIVerifier &VR; // Active verifier.
bool IsValid; // Validity status.
unsigned I; // Current operand index.
ConstantStruct *CI; // GlobalVariable constant initializer.
public:
DIVerifyAppMgr(DIVerifier &V, GlobalVariable *GV)
: DIApplyManager()
, VR(V)
, IsValid(true)
, I(1)
, CI(cast<ConstantStruct>(GV->getInitializer()))
{
}
// Accessors.
bool isValid() const { return IsValid; }
/// Apply - Set the value of each of the fields.
///
virtual void Apply(int &Field) {
Constant *C = CI->getOperand(I++);
IsValid = IsValid && isa<ConstantInt>(C);
}
virtual void Apply(unsigned &Field) {
Constant *C = CI->getOperand(I++);
IsValid = IsValid && isa<ConstantInt>(C);
}
virtual void Apply(bool &Field) {
Constant *C = CI->getOperand(I++);
IsValid = IsValid && isa<ConstantBool>(C);
}
virtual void Apply(std::string &Field) {
Constant *C = CI->getOperand(I++);
IsValid = IsValid && isStringValue(C);
}
virtual void Apply(DebugInfoDesc *&Field) {
// FIXME - Prepare the correct descriptor.
Constant *C = CI->getOperand(I++);
IsValid = IsValid && isGlobalValue(C);
}
virtual void Apply(GlobalVariable *&Field) {
Constant *C = CI->getOperand(I++);
IsValid = IsValid && isGlobalValue(C);
}
};
//===----------------------------------------------------------------------===//
/// DebugVersionFromGlobal - Returns the version number from a compile unit
/// GlobalVariable.
unsigned CompileUnitDesc::DebugVersionFromGlobal(GlobalVariable *GV,
bool Checking) {
if (Checking && !isUIntOperand(GV, 1)) return DIInvalid;
ConstantStruct *CI = cast<ConstantStruct>(GV->getInitializer());
Constant *C = CI->getOperand(1);
return cast<ConstantUInt>(C)->getValue();
}
/// getContext - Return the "lldb.compile_unit" context global.
/// ApplyToFields - Target the apply manager to the fields of the
/// CompileUnitDesc.
void CompileUnitDesc::ApplyToFields(DIApplyManager *Mgr) {
Mgr->Apply(DebugVersion);
Mgr->Apply(Language);
Mgr->Apply(FileName);
Mgr->Apply(Directory);
Mgr->Apply(Producer);
Mgr->Apply(TransUnit);
}
/// TypeString - Return a string used to compose globalnames and labels.
///
GlobalVariable *GlobalWrapper::getContext() const {
return getGlobalValue(IC->getOperand(Context_op));
const char *CompileUnitDesc::TypeString() const {
return "compile_unit";
}
/// getName - Return the name of the global.
///
const std::string GlobalWrapper::getName() const {
return getStringValue(IC->getOperand(Name_op));
#ifndef NDEBUG
void CompileUnitDesc::dump() {
std::cerr << TypeString() << " "
<< "Tag(" << getTag() << "), "
<< "Language(" << Language << "), "
<< "FileName(\"" << FileName << "\"), "
<< "Directory(\"" << Directory << "\"), "
<< "Producer(\"" << Producer << "\")\n";
}
#endif
//===----------------------------------------------------------------------===//
/// ApplyToFields - Target the apply manager to the fields of the
/// GlobalVariableDesc.
void GlobalVariableDesc::ApplyToFields(DIApplyManager *Mgr) {
Mgr->Apply(Context);
Mgr->Apply(Name);
Mgr->Apply(TransUnit);
Mgr->Apply(TyDesc);
Mgr->Apply(IsStatic);
Mgr->Apply(IsDefinition);
Mgr->Apply(Global);
}
/// getType - Return the type of the global.
/// TypeString - Return a string used to compose globalnames and labels.
///
const GlobalVariable *GlobalWrapper::getType() const {
return getGlobalValue(IC->getOperand(Type_op));
const char *GlobalVariableDesc::TypeString() const {
return "global_variable";
}
/// isStatic - Return true if the global is static.
///
bool GlobalWrapper::isStatic() const {
return cast<ConstantBool>(IC->getOperand(Static_op))->getValue();
#ifndef NDEBUG
void GlobalVariableDesc::dump() {
std::cerr << TypeString() << " "
<< "Tag(" << getTag() << "), "
<< "Name(\"" << Name << "\"), "
<< "Type(" << TyDesc << "), "
<< "IsStatic(" << (IsStatic ? "true" : "false") << "), "
<< "IsDefinition(" << (IsDefinition ? "true" : "false") << "), "
<< "Global(" << Global << ")\n";
}
#endif
//===----------------------------------------------------------------------===//
/// ApplyToFields - Target the apply manager to the fields of the
/// SubprogramDesc.
void SubprogramDesc::ApplyToFields(DIApplyManager *Mgr) {
Mgr->Apply(Context);
Mgr->Apply(Name);
Mgr->Apply(TransUnit);
Mgr->Apply(TyDesc);
Mgr->Apply(IsStatic);
Mgr->Apply(IsDefinition);
// FIXME - Temp variable until restructured.
GlobalVariable *Tmp;
Mgr->Apply(Tmp);
}
/// isDefinition - Return true if the global is a definition.
/// TypeString - Return a string used to compose globalnames and labels.
///
bool GlobalWrapper::isDefinition() const {
return dyn_cast<ConstantBool>(IC->getOperand(Definition_op))->getValue();
const char *SubprogramDesc::TypeString() const {
return "subprogram";
}
/// getGlobalVariable - Return the global variable (tag == DW_TAG_variable.)
#ifndef NDEBUG
void SubprogramDesc::dump() {
std::cerr << TypeString() << " "
<< "Tag(" << getTag() << "), "
<< "Name(\"" << Name << "\"), "
<< "Type(" << TyDesc << "), "
<< "IsStatic(" << (IsStatic ? "true" : "false") << "), "
<< "IsDefinition(" << (IsDefinition ? "true" : "false") << ")\n";
}
#endif
//===----------------------------------------------------------------------===//
DebugInfoDesc *DIDeserializer::Deserialize(Value *V) {
return Deserialize(cast<GlobalVariable>(V));
}
DebugInfoDesc *DIDeserializer::Deserialize(GlobalVariable *GV) {
// Check to see if it has been already deserialized.
DebugInfoDesc *&Slot = GlobalDescs[GV];
if (Slot) return Slot;
// Get the Tag from the global.
unsigned Tag = DebugInfoDesc::TagFromGlobal(GV);
// Get the debug version if a compile unit.
if (Tag == DI_TAG_compile_unit) {
DebugVersion = CompileUnitDesc::DebugVersionFromGlobal(GV);
}
// Create an empty instance of the correct sort.
Slot = DebugInfoDesc::DescFactory(Tag);
assert(Slot && "Unknown Tag");
// Deserialize the fields.
DIDeserializeAppMgr DRAM(*this, GV);
DRAM.ApplyToFields(Slot);
return Slot;
}
//===----------------------------------------------------------------------===//
/// getStrPtrType - Return a "sbyte *" type.
///
GlobalVariable *GlobalWrapper::getGlobalVariable() const {
return getGlobalValue(IC->getOperand(GlobalVariable_op));
const PointerType *DISerializer::getStrPtrType() {
// If not already defined.
if (!StrPtrTy) {
// Construct the pointer to signed bytes.
StrPtrTy = PointerType::get(Type::SByteTy);
}
return StrPtrTy;
}
/// getEmptyStructPtrType - Return a "{ }*" type.
///
const PointerType *DISerializer::getEmptyStructPtrType() {
// If not already defined.
if (!EmptyStructPtrTy) {
// Construct the empty structure type.
const StructType *EmptyStructTy =
StructType::get(std::vector<const Type*>());
// Construct the pointer to empty structure type.
EmptyStructPtrTy = PointerType::get(EmptyStructTy);
}
return EmptyStructPtrTy;
}
/// getTagType - Return the type describing the specified descriptor (via tag.)
///
const StructType *DISerializer::getTagType(DebugInfoDesc *DD) {
// Attempt to get the previously defined type.
StructType *&Ty = TagTypes[DD->getTag()];
// If not already defined.
if (!Ty) {
// Get descriptor type name.
const char *TS = DD->TypeString();
// Set up fields vector.
std::vector<const Type*> Fields;
// Add tag field.
Fields.push_back(Type::UIntTy);
// Get types of remaining fields.
DIGetTypesAppMgr GTAM(*this, Fields);
GTAM.ApplyToFields(DD);
// Construct structured type.
Ty = StructType::get(Fields);
// Construct a name for the type.
const std::string Name = std::string("lldb.") + DD->TypeString() + ".type";
// Register type name with module.
M->addTypeName(Name, Ty);
}
return Ty;
}
/// getString - Construct the string as constant string global.
///
GlobalVariable *DISerializer::getString(const std::string &String) {
// Check string cache for previous edition.
GlobalVariable *&Slot = StringCache[String];
// return GlobalVariable if previously defined.
if (Slot) return Slot;
// Construct strings as an llvm constant.
Constant *ConstStr = ConstantArray::get(String);
// Otherwise create and return a new string global.
return Slot = new GlobalVariable(ConstStr->getType(), true,
GlobalVariable::InternalLinkage,
ConstStr, "str", M);
}
/// Serialize - Recursively cast the specified descriptor into a GlobalVariable
/// so that it can be serialized to a .bc or .ll file.
GlobalVariable *DISerializer::Serialize(DebugInfoDesc *DD) {
// Check if the DebugInfoDesc is already in the map.
GlobalVariable *&Slot = DescGlobals[DD];
// See if DebugInfoDesc exists, if so return prior GlobalVariable.
if (Slot) return Slot;
// Get DebugInfoDesc type Tag.
unsigned Tag = DD->getTag();
// Construct name.
const std::string Name = std::string("lldb.") +
DD->TypeString();
// Get the type associated with the Tag.
const StructType *Ty = getTagType(DD);
// Create the GlobalVariable early to prevent infinite recursion.
GlobalVariable *GV = new GlobalVariable(Ty, true,
GlobalValue::InternalLinkage,
NULL, Name, M);
// Insert new GlobalVariable in DescGlobals map.
Slot = GV;
// Set up elements vector
std::vector<Constant*> Elements;
// Add Tag value.
Elements.push_back(ConstantUInt::get(Type::UIntTy, Tag));
// Add remaining fields.
DISerializeAppMgr SRAM(*this, Elements);
SRAM.ApplyToFields(DD);
// Set the globals initializer.
GV->setInitializer(ConstantStruct::get(Ty, Elements));
return GV;
}
//===----------------------------------------------------------------------===//
/// markVisited - Return true if the GlobalVariable hase been "seen" before.
/// Mark visited otherwise.
bool DIVerifier::markVisited(GlobalVariable *GV) {
// Check if the GlobalVariable is already in the Visited set.
std::set<GlobalVariable *>::iterator VI = Visited.lower_bound(GV);
// See if GlobalVariable exists.
bool Exists = VI != Visited.end() && *VI == GV;
// Insert in set.
if (!Exists) Visited.insert(VI, GV);
return Exists;
}
/// Verify - Return true if the GlobalVariable appears to be a valid
/// serialization of a DebugInfoDesc.
bool DIVerifier::Verify(GlobalVariable *GV) {
// Check if seen before.
if (markVisited(GV)) return true;
// Get the Tag
unsigned Tag = DebugInfoDesc::TagFromGlobal(GV, true);
if (Tag == DIInvalid) return false;
// If a compile unit we need the debug version.
if (Tag == DI_TAG_compile_unit) {
DebugVersion = CompileUnitDesc::DebugVersionFromGlobal(GV, true);
if (DebugVersion == DIInvalid) return false;
}
// Construct an empty DebugInfoDesc.
DebugInfoDesc *DD = DebugInfoDesc::DescFactory(Tag);
if (!DD) return false;
// Get the initializer constant.
ConstantStruct *CI = cast<ConstantStruct>(GV->getInitializer());
// Get the operand count.
unsigned N = CI->getNumOperands();
// Get the field count.
unsigned &Slot = Counts[Tag];
if (!Slot) {
// Check the operand count to the field count
DICountAppMgr CTAM;
CTAM.ApplyToFields(DD);
Slot = CTAM.getCount();
}
// Field count must equal operand count.
if (Slot != N) {
delete DD;
return false;
}
// Check each field for valid type.
DIVerifyAppMgr VRAM(*this, GV);
VRAM.ApplyToFields(DD);
// Release empty DebugInfoDesc.
delete DD;
// Return result of field tests.
return VRAM.isValid();
}
//===----------------------------------------------------------------------===//
MachineDebugInfo::MachineDebugInfo()
: CompileUnits()
: SR()
, DR()
, VR()
, CompileUnits()
, Directories()
, SourceFiles()
, Lines()
@ -248,54 +766,56 @@ bool MachineDebugInfo::doFinalization() {
/// AnalyzeModule - Scan the module for global debug information.
///
void MachineDebugInfo::AnalyzeModule(Module &M) {
SR.setModule(&M);
DR.setModule(&M);
SetupCompileUnits(M);
}
/// SetupCompileUnits - Set up the unique vector of compile units.
///
void MachineDebugInfo::SetupCompileUnits(Module &M) {
SR.setModule(&M);
DR.setModule(&M);
// Get vector of all debug compile units.
std::vector<GlobalVariable*> Globals =
getGlobalVariablesUsing(M, "llvm.dbg.translation_units");
// Scan all compile unit globals.
for (unsigned i = 0, N = Globals.size(); i < N; ++i) {
// Create wrapper for compile unit.
CompileUnitWrapper CUI(Globals[i]);
// Add to result.
if (CUI.isCorrectDebugVersion()) CompileUnits.insert(CUI);
// Add compile unit to result.
CompileUnits.insert(
static_cast<CompileUnitDesc *>(DR.Deserialize(Globals[i])));
}
// If there any bad compile units then suppress debug information
if (CompileUnits.size() != Globals.size()) CompileUnits.reset();
}
/// getCompileUnits - Return a vector of debug compile units.
///
const UniqueVector<CompileUnitWrapper> MachineDebugInfo::getCompileUnits()const{
const UniqueVector<CompileUnitDesc *> MachineDebugInfo::getCompileUnits()const{
return CompileUnits;
}
/// getGlobalVariables - Return a vector of debug global variables.
/// getGlobalVariables - Return a vector of debug GlobalVariables.
///
std::vector<GlobalWrapper> MachineDebugInfo::getGlobalVariables(Module &M) {
std::vector<GlobalVariableDesc *>
MachineDebugInfo::getGlobalVariables(Module &M) {
SR.setModule(&M);
DR.setModule(&M);
// Get vector of all debug global objects.
std::vector<GlobalVariable*> Globals =
getGlobalVariablesUsing(M, "llvm.dbg.globals");
// Accumulation of global variables.
std::vector<GlobalWrapper> GlobalVariables;
// Accumulation of GlobalVariables.
std::vector<GlobalVariableDesc *> GlobalVariables;
// FIXME - skip until globals have new format
#if 0
// Scan all globals.
for (unsigned i = 0, N = Globals.size(); i < N; ++i) {
// Create wrapper for global.
GlobalWrapper GW(Globals[i]);
// If the global is a variable then add to result.
if (GW.getTag() == DW_TAG_variable) GlobalVariables.push_back(GW);
GlobalVariable *GV = Globals[i];
if (DebugInfoDesc::TagFromGlobal(GV, true) == DI_TAG_global_variable) {
GlobalVariableDesc *GVD =
static_cast<GlobalVariableDesc *>(DR.Deserialize(GV));
GlobalVariables.push_back(GVD);
}
}
#endif
return GlobalVariables;
}