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https://github.com/c64scene-ar/llvm-6502.git
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This involves temporarily hard wiring some parts to use the global context. This isn't ideal, but it's the only way I could figure out to make this process vaguely incremental. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75445 91177308-0d34-0410-b5e6-96231b3b80d8
1173 lines
39 KiB
C++
1173 lines
39 KiB
C++
//===--- DebugInfo.cpp - Debug Information Helper Classes -----------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the helper classes used to build and interpret debug
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// information in LLVM IR form.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Analysis/DebugInfo.h"
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#include "llvm/Constants.h"
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#include "llvm/DerivedTypes.h"
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#include "llvm/Intrinsics.h"
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#include "llvm/IntrinsicInst.h"
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#include "llvm/Instructions.h"
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#include "llvm/LLVMContext.h"
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#include "llvm/Module.h"
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#include "llvm/Analysis/ValueTracking.h"
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#include "llvm/Support/Dwarf.h"
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#include "llvm/Support/DebugLoc.h"
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#include "llvm/Support/Streams.h"
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using namespace llvm;
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using namespace llvm::dwarf;
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//===----------------------------------------------------------------------===//
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// DIDescriptor
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//===----------------------------------------------------------------------===//
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/// ValidDebugInfo - Return true if V represents valid debug info value.
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bool DIDescriptor::ValidDebugInfo(Value *V, CodeGenOpt::Level OptLevel) {
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if (!V)
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return false;
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GlobalVariable *GV = dyn_cast<GlobalVariable>(V->stripPointerCasts());
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if (!GV)
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return false;
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if (!GV->hasInternalLinkage () && !GV->hasLinkOnceLinkage())
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return false;
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DIDescriptor DI(GV);
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// Check current version. Allow Version6 for now.
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unsigned Version = DI.getVersion();
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if (Version != LLVMDebugVersion && Version != LLVMDebugVersion6)
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return false;
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unsigned Tag = DI.getTag();
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switch (Tag) {
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case DW_TAG_variable:
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assert(DIVariable(GV).Verify() && "Invalid DebugInfo value");
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break;
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case DW_TAG_compile_unit:
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assert(DICompileUnit(GV).Verify() && "Invalid DebugInfo value");
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break;
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case DW_TAG_subprogram:
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assert(DISubprogram(GV).Verify() && "Invalid DebugInfo value");
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break;
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case DW_TAG_lexical_block:
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// FIXME: This interfers with the quality of generated code during
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// optimization.
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if (OptLevel != CodeGenOpt::None)
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return false;
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// FALLTHROUGH
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default:
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break;
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}
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return true;
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}
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DIDescriptor::DIDescriptor(GlobalVariable *GV, unsigned RequiredTag) {
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DbgGV = GV;
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// If this is non-null, check to see if the Tag matches. If not, set to null.
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if (GV && getTag() != RequiredTag)
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DbgGV = 0;
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}
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const std::string &
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DIDescriptor::getStringField(unsigned Elt, std::string &Result) const {
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if (DbgGV == 0) {
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Result.clear();
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return Result;
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}
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Constant *C = DbgGV->getInitializer();
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if (C == 0 || Elt >= C->getNumOperands()) {
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Result.clear();
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return Result;
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}
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// Fills in the string if it succeeds
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if (!GetConstantStringInfo(C->getOperand(Elt), Result))
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Result.clear();
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return Result;
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}
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uint64_t DIDescriptor::getUInt64Field(unsigned Elt) const {
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if (DbgGV == 0) return 0;
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Constant *C = DbgGV->getInitializer();
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if (C == 0 || Elt >= C->getNumOperands())
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return 0;
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if (ConstantInt *CI = dyn_cast<ConstantInt>(C->getOperand(Elt)))
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return CI->getZExtValue();
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return 0;
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}
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DIDescriptor DIDescriptor::getDescriptorField(unsigned Elt) const {
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if (DbgGV == 0) return DIDescriptor();
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Constant *C = DbgGV->getInitializer();
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if (C == 0 || Elt >= C->getNumOperands())
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return DIDescriptor();
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C = C->getOperand(Elt);
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return DIDescriptor(dyn_cast<GlobalVariable>(C->stripPointerCasts()));
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}
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GlobalVariable *DIDescriptor::getGlobalVariableField(unsigned Elt) const {
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if (DbgGV == 0) return 0;
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Constant *C = DbgGV->getInitializer();
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if (C == 0 || Elt >= C->getNumOperands())
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return 0;
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C = C->getOperand(Elt);
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return dyn_cast<GlobalVariable>(C->stripPointerCasts());
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}
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//===----------------------------------------------------------------------===//
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// Simple Descriptor Constructors and other Methods
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//===----------------------------------------------------------------------===//
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// Needed by DIVariable::getType().
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DIType::DIType(GlobalVariable *GV) : DIDescriptor(GV) {
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if (!GV) return;
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unsigned tag = getTag();
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if (tag != dwarf::DW_TAG_base_type && !DIDerivedType::isDerivedType(tag) &&
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!DICompositeType::isCompositeType(tag))
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DbgGV = 0;
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}
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/// isDerivedType - Return true if the specified tag is legal for
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/// DIDerivedType.
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bool DIType::isDerivedType(unsigned Tag) {
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switch (Tag) {
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case dwarf::DW_TAG_typedef:
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case dwarf::DW_TAG_pointer_type:
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case dwarf::DW_TAG_reference_type:
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case dwarf::DW_TAG_const_type:
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case dwarf::DW_TAG_volatile_type:
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case dwarf::DW_TAG_restrict_type:
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case dwarf::DW_TAG_member:
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case dwarf::DW_TAG_inheritance:
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return true;
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default:
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// FIXME: Even though it doesn't make sense, CompositeTypes are current
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// modelled as DerivedTypes, this should return true for them as well.
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return false;
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}
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}
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/// isCompositeType - Return true if the specified tag is legal for
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/// DICompositeType.
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bool DIType::isCompositeType(unsigned TAG) {
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switch (TAG) {
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case dwarf::DW_TAG_array_type:
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case dwarf::DW_TAG_structure_type:
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case dwarf::DW_TAG_union_type:
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case dwarf::DW_TAG_enumeration_type:
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case dwarf::DW_TAG_vector_type:
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case dwarf::DW_TAG_subroutine_type:
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case dwarf::DW_TAG_class_type:
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return true;
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default:
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return false;
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}
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}
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/// isVariable - Return true if the specified tag is legal for DIVariable.
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bool DIVariable::isVariable(unsigned Tag) {
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switch (Tag) {
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case dwarf::DW_TAG_auto_variable:
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case dwarf::DW_TAG_arg_variable:
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case dwarf::DW_TAG_return_variable:
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return true;
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default:
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return false;
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}
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}
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unsigned DIArray::getNumElements() const {
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assert (DbgGV && "Invalid DIArray");
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Constant *C = DbgGV->getInitializer();
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assert (C && "Invalid DIArray initializer");
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return C->getNumOperands();
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}
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/// Verify - Verify that a compile unit is well formed.
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bool DICompileUnit::Verify() const {
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if (isNull())
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return false;
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std::string Res;
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if (getFilename(Res).empty())
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return false;
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// It is possible that directory and produce string is empty.
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return true;
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}
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/// Verify - Verify that a type descriptor is well formed.
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bool DIType::Verify() const {
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if (isNull())
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return false;
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if (getContext().isNull())
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return false;
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DICompileUnit CU = getCompileUnit();
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if (!CU.isNull() && !CU.Verify())
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return false;
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return true;
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}
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/// Verify - Verify that a composite type descriptor is well formed.
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bool DICompositeType::Verify() const {
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if (isNull())
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return false;
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if (getContext().isNull())
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return false;
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DICompileUnit CU = getCompileUnit();
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if (!CU.isNull() && !CU.Verify())
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return false;
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return true;
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}
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/// Verify - Verify that a subprogram descriptor is well formed.
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bool DISubprogram::Verify() const {
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if (isNull())
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return false;
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if (getContext().isNull())
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return false;
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DICompileUnit CU = getCompileUnit();
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if (!CU.Verify())
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return false;
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DICompositeType Ty = getType();
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if (!Ty.isNull() && !Ty.Verify())
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return false;
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return true;
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}
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/// Verify - Verify that a global variable descriptor is well formed.
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bool DIGlobalVariable::Verify() const {
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if (isNull())
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return false;
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if (getContext().isNull())
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return false;
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DICompileUnit CU = getCompileUnit();
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if (!CU.isNull() && !CU.Verify())
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return false;
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DIType Ty = getType();
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if (!Ty.Verify())
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return false;
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if (!getGlobal())
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return false;
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return true;
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}
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/// Verify - Verify that a variable descriptor is well formed.
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bool DIVariable::Verify() const {
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if (isNull())
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return false;
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if (getContext().isNull())
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return false;
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DIType Ty = getType();
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if (!Ty.Verify())
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return false;
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return true;
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}
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/// getOriginalTypeSize - If this type is derived from a base type then
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/// return base type size.
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uint64_t DIDerivedType::getOriginalTypeSize() const {
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if (getTag() != dwarf::DW_TAG_member)
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return getSizeInBits();
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DIType BT = getTypeDerivedFrom();
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if (BT.getTag() != dwarf::DW_TAG_base_type)
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return getSizeInBits();
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return BT.getSizeInBits();
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}
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/// describes - Return true if this subprogram provides debugging
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/// information for the function F.
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bool DISubprogram::describes(const Function *F) {
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assert (F && "Invalid function");
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std::string Name;
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getLinkageName(Name);
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if (Name.empty())
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getName(Name);
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if (!Name.empty() && (strcmp(Name.c_str(), F->getNameStart()) == false))
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return true;
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return false;
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}
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//===----------------------------------------------------------------------===//
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// DIDescriptor: dump routines for all descriptors.
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//===----------------------------------------------------------------------===//
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/// dump - Print descriptor.
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void DIDescriptor::dump() const {
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cerr << "[" << dwarf::TagString(getTag()) << "] ";
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cerr << std::hex << "[GV:" << DbgGV << "]" << std::dec;
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}
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/// dump - Print compile unit.
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void DICompileUnit::dump() const {
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if (getLanguage())
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cerr << " [" << dwarf::LanguageString(getLanguage()) << "] ";
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std::string Res1, Res2;
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cerr << " [" << getDirectory(Res1) << "/" << getFilename(Res2) << " ]";
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}
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/// dump - Print type.
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void DIType::dump() const {
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if (isNull()) return;
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std::string Res;
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if (!getName(Res).empty())
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cerr << " [" << Res << "] ";
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unsigned Tag = getTag();
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cerr << " [" << dwarf::TagString(Tag) << "] ";
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// TODO : Print context
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getCompileUnit().dump();
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cerr << " ["
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<< getLineNumber() << ", "
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<< getSizeInBits() << ", "
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<< getAlignInBits() << ", "
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<< getOffsetInBits()
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<< "] ";
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if (isPrivate())
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cerr << " [private] ";
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else if (isProtected())
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cerr << " [protected] ";
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if (isForwardDecl())
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cerr << " [fwd] ";
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if (isBasicType(Tag))
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DIBasicType(DbgGV).dump();
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else if (isDerivedType(Tag))
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DIDerivedType(DbgGV).dump();
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else if (isCompositeType(Tag))
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DICompositeType(DbgGV).dump();
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else {
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cerr << "Invalid DIType\n";
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return;
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}
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cerr << "\n";
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}
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/// dump - Print basic type.
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void DIBasicType::dump() const {
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cerr << " [" << dwarf::AttributeEncodingString(getEncoding()) << "] ";
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}
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/// dump - Print derived type.
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void DIDerivedType::dump() const {
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cerr << "\n\t Derived From: "; getTypeDerivedFrom().dump();
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}
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/// dump - Print composite type.
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void DICompositeType::dump() const {
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DIArray A = getTypeArray();
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if (A.isNull())
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return;
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cerr << " [" << A.getNumElements() << " elements]";
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}
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/// dump - Print global.
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void DIGlobal::dump() const {
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std::string Res;
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if (!getName(Res).empty())
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cerr << " [" << Res << "] ";
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unsigned Tag = getTag();
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cerr << " [" << dwarf::TagString(Tag) << "] ";
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// TODO : Print context
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getCompileUnit().dump();
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cerr << " [" << getLineNumber() << "] ";
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if (isLocalToUnit())
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cerr << " [local] ";
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if (isDefinition())
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cerr << " [def] ";
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if (isGlobalVariable(Tag))
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DIGlobalVariable(DbgGV).dump();
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cerr << "\n";
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}
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/// dump - Print subprogram.
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void DISubprogram::dump() const {
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DIGlobal::dump();
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}
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/// dump - Print global variable.
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void DIGlobalVariable::dump() const {
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cerr << " ["; getGlobal()->dump(); cerr << "] ";
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}
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/// dump - Print variable.
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void DIVariable::dump() const {
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std::string Res;
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if (!getName(Res).empty())
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cerr << " [" << Res << "] ";
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getCompileUnit().dump();
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cerr << " [" << getLineNumber() << "] ";
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getType().dump();
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cerr << "\n";
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}
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//===----------------------------------------------------------------------===//
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// DIFactory: Basic Helpers
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//===----------------------------------------------------------------------===//
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DIFactory::DIFactory(Module &m)
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: M(m), VMContext(M.getContext()), StopPointFn(0), FuncStartFn(0),
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RegionStartFn(0), RegionEndFn(0),
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DeclareFn(0) {
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EmptyStructPtr = VMContext.getPointerTypeUnqual(VMContext.getStructType());
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}
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/// getCastToEmpty - Return this descriptor as a Constant* with type '{}*'.
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/// This is only valid when the descriptor is non-null.
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Constant *DIFactory::getCastToEmpty(DIDescriptor D) {
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if (D.isNull()) return VMContext.getNullValue(EmptyStructPtr);
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return VMContext.getConstantExprBitCast(D.getGV(), EmptyStructPtr);
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}
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Constant *DIFactory::GetTagConstant(unsigned TAG) {
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assert((TAG & LLVMDebugVersionMask) == 0 &&
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"Tag too large for debug encoding!");
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return VMContext.getConstantInt(Type::Int32Ty, TAG | LLVMDebugVersion);
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}
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Constant *DIFactory::GetStringConstant(const std::string &String) {
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// Check string cache for previous edition.
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Constant *&Slot = StringCache[String];
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// Return Constant if previously defined.
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if (Slot) return Slot;
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const PointerType *DestTy = VMContext.getPointerTypeUnqual(Type::Int8Ty);
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// If empty string then use a i8* null instead.
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if (String.empty())
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return Slot = VMContext.getConstantPointerNull(DestTy);
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// Construct string as an llvm constant.
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Constant *ConstStr = VMContext.getConstantArray(String);
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// Otherwise create and return a new string global.
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GlobalVariable *StrGV = new GlobalVariable(M, ConstStr->getType(), true,
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GlobalVariable::InternalLinkage,
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ConstStr, ".str");
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StrGV->setSection("llvm.metadata");
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return Slot = VMContext.getConstantExprBitCast(StrGV, DestTy);
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}
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//===----------------------------------------------------------------------===//
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// DIFactory: Primary Constructors
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//===----------------------------------------------------------------------===//
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/// GetOrCreateArray - Create an descriptor for an array of descriptors.
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/// This implicitly uniques the arrays created.
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DIArray DIFactory::GetOrCreateArray(DIDescriptor *Tys, unsigned NumTys) {
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SmallVector<Constant*, 16> Elts;
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for (unsigned i = 0; i != NumTys; ++i)
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Elts.push_back(getCastToEmpty(Tys[i]));
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Constant *Init = VMContext.getConstantArray(VMContext.getArrayType(EmptyStructPtr,
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Elts.size()),
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Elts.data(), Elts.size());
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// If we already have this array, just return the uniqued version.
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DIDescriptor &Entry = SimpleConstantCache[Init];
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if (!Entry.isNull()) return DIArray(Entry.getGV());
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GlobalVariable *GV = new GlobalVariable(M, Init->getType(), true,
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GlobalValue::InternalLinkage,
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Init, "llvm.dbg.array");
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GV->setSection("llvm.metadata");
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Entry = DIDescriptor(GV);
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return DIArray(GV);
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}
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/// GetOrCreateSubrange - Create a descriptor for a value range. This
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/// implicitly uniques the values returned.
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DISubrange DIFactory::GetOrCreateSubrange(int64_t Lo, int64_t Hi) {
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Constant *Elts[] = {
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GetTagConstant(dwarf::DW_TAG_subrange_type),
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VMContext.getConstantInt(Type::Int64Ty, Lo),
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VMContext.getConstantInt(Type::Int64Ty, Hi)
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};
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Constant *Init = VMContext.getConstantStruct(Elts,
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sizeof(Elts)/sizeof(Elts[0]));
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// If we already have this range, just return the uniqued version.
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DIDescriptor &Entry = SimpleConstantCache[Init];
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if (!Entry.isNull()) return DISubrange(Entry.getGV());
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|
|
M.addTypeName("llvm.dbg.subrange.type", Init->getType());
|
|
|
|
GlobalVariable *GV = new GlobalVariable(M, Init->getType(), true,
|
|
GlobalValue::InternalLinkage,
|
|
Init, "llvm.dbg.subrange");
|
|
GV->setSection("llvm.metadata");
|
|
Entry = DIDescriptor(GV);
|
|
return DISubrange(GV);
|
|
}
|
|
|
|
|
|
|
|
/// CreateCompileUnit - Create a new descriptor for the specified compile
|
|
/// unit. Note that this does not unique compile units within the module.
|
|
DICompileUnit DIFactory::CreateCompileUnit(unsigned LangID,
|
|
const std::string &Filename,
|
|
const std::string &Directory,
|
|
const std::string &Producer,
|
|
bool isMain,
|
|
bool isOptimized,
|
|
const char *Flags,
|
|
unsigned RunTimeVer) {
|
|
Constant *Elts[] = {
|
|
GetTagConstant(dwarf::DW_TAG_compile_unit),
|
|
VMContext.getNullValue(EmptyStructPtr),
|
|
VMContext.getConstantInt(Type::Int32Ty, LangID),
|
|
GetStringConstant(Filename),
|
|
GetStringConstant(Directory),
|
|
GetStringConstant(Producer),
|
|
VMContext.getConstantInt(Type::Int1Ty, isMain),
|
|
VMContext.getConstantInt(Type::Int1Ty, isOptimized),
|
|
GetStringConstant(Flags),
|
|
VMContext.getConstantInt(Type::Int32Ty, RunTimeVer)
|
|
};
|
|
|
|
Constant *Init = VMContext.getConstantStruct(Elts,
|
|
sizeof(Elts)/sizeof(Elts[0]));
|
|
|
|
M.addTypeName("llvm.dbg.compile_unit.type", Init->getType());
|
|
GlobalVariable *GV = new GlobalVariable(M, Init->getType(), true,
|
|
GlobalValue::LinkOnceAnyLinkage,
|
|
Init, "llvm.dbg.compile_unit");
|
|
GV->setSection("llvm.metadata");
|
|
return DICompileUnit(GV);
|
|
}
|
|
|
|
/// CreateEnumerator - Create a single enumerator value.
|
|
DIEnumerator DIFactory::CreateEnumerator(const std::string &Name, uint64_t Val){
|
|
Constant *Elts[] = {
|
|
GetTagConstant(dwarf::DW_TAG_enumerator),
|
|
GetStringConstant(Name),
|
|
VMContext.getConstantInt(Type::Int64Ty, Val)
|
|
};
|
|
|
|
Constant *Init = VMContext.getConstantStruct(Elts,
|
|
sizeof(Elts)/sizeof(Elts[0]));
|
|
|
|
M.addTypeName("llvm.dbg.enumerator.type", Init->getType());
|
|
GlobalVariable *GV = new GlobalVariable(M, Init->getType(), true,
|
|
GlobalValue::InternalLinkage,
|
|
Init, "llvm.dbg.enumerator");
|
|
GV->setSection("llvm.metadata");
|
|
return DIEnumerator(GV);
|
|
}
|
|
|
|
|
|
/// CreateBasicType - Create a basic type like int, float, etc.
|
|
DIBasicType DIFactory::CreateBasicType(DIDescriptor Context,
|
|
const std::string &Name,
|
|
DICompileUnit CompileUnit,
|
|
unsigned LineNumber,
|
|
uint64_t SizeInBits,
|
|
uint64_t AlignInBits,
|
|
uint64_t OffsetInBits, unsigned Flags,
|
|
unsigned Encoding) {
|
|
Constant *Elts[] = {
|
|
GetTagConstant(dwarf::DW_TAG_base_type),
|
|
getCastToEmpty(Context),
|
|
GetStringConstant(Name),
|
|
getCastToEmpty(CompileUnit),
|
|
VMContext.getConstantInt(Type::Int32Ty, LineNumber),
|
|
VMContext.getConstantInt(Type::Int64Ty, SizeInBits),
|
|
VMContext.getConstantInt(Type::Int64Ty, AlignInBits),
|
|
VMContext.getConstantInt(Type::Int64Ty, OffsetInBits),
|
|
VMContext.getConstantInt(Type::Int32Ty, Flags),
|
|
VMContext.getConstantInt(Type::Int32Ty, Encoding)
|
|
};
|
|
|
|
Constant *Init = VMContext.getConstantStruct(Elts,
|
|
sizeof(Elts)/sizeof(Elts[0]));
|
|
|
|
M.addTypeName("llvm.dbg.basictype.type", Init->getType());
|
|
GlobalVariable *GV = new GlobalVariable(M, Init->getType(), true,
|
|
GlobalValue::InternalLinkage,
|
|
Init, "llvm.dbg.basictype");
|
|
GV->setSection("llvm.metadata");
|
|
return DIBasicType(GV);
|
|
}
|
|
|
|
/// CreateDerivedType - Create a derived type like const qualified type,
|
|
/// pointer, typedef, etc.
|
|
DIDerivedType DIFactory::CreateDerivedType(unsigned Tag,
|
|
DIDescriptor Context,
|
|
const std::string &Name,
|
|
DICompileUnit CompileUnit,
|
|
unsigned LineNumber,
|
|
uint64_t SizeInBits,
|
|
uint64_t AlignInBits,
|
|
uint64_t OffsetInBits,
|
|
unsigned Flags,
|
|
DIType DerivedFrom) {
|
|
Constant *Elts[] = {
|
|
GetTagConstant(Tag),
|
|
getCastToEmpty(Context),
|
|
GetStringConstant(Name),
|
|
getCastToEmpty(CompileUnit),
|
|
VMContext.getConstantInt(Type::Int32Ty, LineNumber),
|
|
VMContext.getConstantInt(Type::Int64Ty, SizeInBits),
|
|
VMContext.getConstantInt(Type::Int64Ty, AlignInBits),
|
|
VMContext.getConstantInt(Type::Int64Ty, OffsetInBits),
|
|
VMContext.getConstantInt(Type::Int32Ty, Flags),
|
|
getCastToEmpty(DerivedFrom)
|
|
};
|
|
|
|
Constant *Init = VMContext.getConstantStruct(Elts,
|
|
sizeof(Elts)/sizeof(Elts[0]));
|
|
|
|
M.addTypeName("llvm.dbg.derivedtype.type", Init->getType());
|
|
GlobalVariable *GV = new GlobalVariable(M, Init->getType(), true,
|
|
GlobalValue::InternalLinkage,
|
|
Init, "llvm.dbg.derivedtype");
|
|
GV->setSection("llvm.metadata");
|
|
return DIDerivedType(GV);
|
|
}
|
|
|
|
/// CreateCompositeType - Create a composite type like array, struct, etc.
|
|
DICompositeType DIFactory::CreateCompositeType(unsigned Tag,
|
|
DIDescriptor Context,
|
|
const std::string &Name,
|
|
DICompileUnit CompileUnit,
|
|
unsigned LineNumber,
|
|
uint64_t SizeInBits,
|
|
uint64_t AlignInBits,
|
|
uint64_t OffsetInBits,
|
|
unsigned Flags,
|
|
DIType DerivedFrom,
|
|
DIArray Elements,
|
|
unsigned RuntimeLang) {
|
|
|
|
Constant *Elts[] = {
|
|
GetTagConstant(Tag),
|
|
getCastToEmpty(Context),
|
|
GetStringConstant(Name),
|
|
getCastToEmpty(CompileUnit),
|
|
VMContext.getConstantInt(Type::Int32Ty, LineNumber),
|
|
VMContext.getConstantInt(Type::Int64Ty, SizeInBits),
|
|
VMContext.getConstantInt(Type::Int64Ty, AlignInBits),
|
|
VMContext.getConstantInt(Type::Int64Ty, OffsetInBits),
|
|
VMContext.getConstantInt(Type::Int32Ty, Flags),
|
|
getCastToEmpty(DerivedFrom),
|
|
getCastToEmpty(Elements),
|
|
VMContext.getConstantInt(Type::Int32Ty, RuntimeLang)
|
|
};
|
|
|
|
Constant *Init = VMContext.getConstantStruct(Elts,
|
|
sizeof(Elts)/sizeof(Elts[0]));
|
|
|
|
M.addTypeName("llvm.dbg.composite.type", Init->getType());
|
|
GlobalVariable *GV = new GlobalVariable(M, Init->getType(), true,
|
|
GlobalValue::InternalLinkage,
|
|
Init, "llvm.dbg.composite");
|
|
GV->setSection("llvm.metadata");
|
|
return DICompositeType(GV);
|
|
}
|
|
|
|
|
|
/// CreateSubprogram - Create a new descriptor for the specified subprogram.
|
|
/// See comments in DISubprogram for descriptions of these fields. This
|
|
/// method does not unique the generated descriptors.
|
|
DISubprogram DIFactory::CreateSubprogram(DIDescriptor Context,
|
|
const std::string &Name,
|
|
const std::string &DisplayName,
|
|
const std::string &LinkageName,
|
|
DICompileUnit CompileUnit,
|
|
unsigned LineNo, DIType Type,
|
|
bool isLocalToUnit,
|
|
bool isDefinition) {
|
|
|
|
Constant *Elts[] = {
|
|
GetTagConstant(dwarf::DW_TAG_subprogram),
|
|
VMContext.getNullValue(EmptyStructPtr),
|
|
getCastToEmpty(Context),
|
|
GetStringConstant(Name),
|
|
GetStringConstant(DisplayName),
|
|
GetStringConstant(LinkageName),
|
|
getCastToEmpty(CompileUnit),
|
|
VMContext.getConstantInt(Type::Int32Ty, LineNo),
|
|
getCastToEmpty(Type),
|
|
VMContext.getConstantInt(Type::Int1Ty, isLocalToUnit),
|
|
VMContext.getConstantInt(Type::Int1Ty, isDefinition)
|
|
};
|
|
|
|
Constant *Init = VMContext.getConstantStruct(Elts,
|
|
sizeof(Elts)/sizeof(Elts[0]));
|
|
|
|
M.addTypeName("llvm.dbg.subprogram.type", Init->getType());
|
|
GlobalVariable *GV = new GlobalVariable(M, Init->getType(), true,
|
|
GlobalValue::LinkOnceAnyLinkage,
|
|
Init, "llvm.dbg.subprogram");
|
|
GV->setSection("llvm.metadata");
|
|
return DISubprogram(GV);
|
|
}
|
|
|
|
/// CreateGlobalVariable - Create a new descriptor for the specified global.
|
|
DIGlobalVariable
|
|
DIFactory::CreateGlobalVariable(DIDescriptor Context, const std::string &Name,
|
|
const std::string &DisplayName,
|
|
const std::string &LinkageName,
|
|
DICompileUnit CompileUnit,
|
|
unsigned LineNo, DIType Type,bool isLocalToUnit,
|
|
bool isDefinition, llvm::GlobalVariable *Val) {
|
|
Constant *Elts[] = {
|
|
GetTagConstant(dwarf::DW_TAG_variable),
|
|
VMContext.getNullValue(EmptyStructPtr),
|
|
getCastToEmpty(Context),
|
|
GetStringConstant(Name),
|
|
GetStringConstant(DisplayName),
|
|
GetStringConstant(LinkageName),
|
|
getCastToEmpty(CompileUnit),
|
|
VMContext.getConstantInt(Type::Int32Ty, LineNo),
|
|
getCastToEmpty(Type),
|
|
VMContext.getConstantInt(Type::Int1Ty, isLocalToUnit),
|
|
VMContext.getConstantInt(Type::Int1Ty, isDefinition),
|
|
VMContext.getConstantExprBitCast(Val, EmptyStructPtr)
|
|
};
|
|
|
|
Constant *Init = VMContext.getConstantStruct(Elts,
|
|
sizeof(Elts)/sizeof(Elts[0]));
|
|
|
|
M.addTypeName("llvm.dbg.global_variable.type", Init->getType());
|
|
GlobalVariable *GV = new GlobalVariable(M, Init->getType(), true,
|
|
GlobalValue::LinkOnceAnyLinkage,
|
|
Init, "llvm.dbg.global_variable");
|
|
GV->setSection("llvm.metadata");
|
|
return DIGlobalVariable(GV);
|
|
}
|
|
|
|
|
|
/// CreateVariable - Create a new descriptor for the specified variable.
|
|
DIVariable DIFactory::CreateVariable(unsigned Tag, DIDescriptor Context,
|
|
const std::string &Name,
|
|
DICompileUnit CompileUnit, unsigned LineNo,
|
|
DIType Type) {
|
|
Constant *Elts[] = {
|
|
GetTagConstant(Tag),
|
|
getCastToEmpty(Context),
|
|
GetStringConstant(Name),
|
|
getCastToEmpty(CompileUnit),
|
|
VMContext.getConstantInt(Type::Int32Ty, LineNo),
|
|
getCastToEmpty(Type)
|
|
};
|
|
|
|
Constant *Init = VMContext.getConstantStruct(Elts,
|
|
sizeof(Elts)/sizeof(Elts[0]));
|
|
|
|
M.addTypeName("llvm.dbg.variable.type", Init->getType());
|
|
GlobalVariable *GV = new GlobalVariable(M, Init->getType(), true,
|
|
GlobalValue::InternalLinkage,
|
|
Init, "llvm.dbg.variable");
|
|
GV->setSection("llvm.metadata");
|
|
return DIVariable(GV);
|
|
}
|
|
|
|
|
|
/// CreateBlock - This creates a descriptor for a lexical block with the
|
|
/// specified parent VMContext.
|
|
DIBlock DIFactory::CreateBlock(DIDescriptor Context) {
|
|
Constant *Elts[] = {
|
|
GetTagConstant(dwarf::DW_TAG_lexical_block),
|
|
getCastToEmpty(Context)
|
|
};
|
|
|
|
Constant *Init = VMContext.getConstantStruct(Elts,
|
|
sizeof(Elts)/sizeof(Elts[0]));
|
|
|
|
M.addTypeName("llvm.dbg.block.type", Init->getType());
|
|
GlobalVariable *GV = new GlobalVariable(M, Init->getType(), true,
|
|
GlobalValue::InternalLinkage,
|
|
Init, "llvm.dbg.block");
|
|
GV->setSection("llvm.metadata");
|
|
return DIBlock(GV);
|
|
}
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// DIFactory: Routines for inserting code into a function
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
/// InsertStopPoint - Create a new llvm.dbg.stoppoint intrinsic invocation,
|
|
/// inserting it at the end of the specified basic block.
|
|
void DIFactory::InsertStopPoint(DICompileUnit CU, unsigned LineNo,
|
|
unsigned ColNo, BasicBlock *BB) {
|
|
|
|
// Lazily construct llvm.dbg.stoppoint function.
|
|
if (!StopPointFn)
|
|
StopPointFn = llvm::Intrinsic::getDeclaration(&M,
|
|
llvm::Intrinsic::dbg_stoppoint);
|
|
|
|
// Invoke llvm.dbg.stoppoint
|
|
Value *Args[] = {
|
|
VMContext.getConstantInt(llvm::Type::Int32Ty, LineNo),
|
|
VMContext.getConstantInt(llvm::Type::Int32Ty, ColNo),
|
|
getCastToEmpty(CU)
|
|
};
|
|
CallInst::Create(StopPointFn, Args, Args+3, "", BB);
|
|
}
|
|
|
|
/// InsertSubprogramStart - Create a new llvm.dbg.func.start intrinsic to
|
|
/// mark the start of the specified subprogram.
|
|
void DIFactory::InsertSubprogramStart(DISubprogram SP, BasicBlock *BB) {
|
|
// Lazily construct llvm.dbg.func.start.
|
|
if (!FuncStartFn)
|
|
FuncStartFn = Intrinsic::getDeclaration(&M, Intrinsic::dbg_func_start);
|
|
|
|
// Call llvm.dbg.func.start which also implicitly sets a stoppoint.
|
|
CallInst::Create(FuncStartFn, getCastToEmpty(SP), "", BB);
|
|
}
|
|
|
|
/// InsertRegionStart - Insert a new llvm.dbg.region.start intrinsic call to
|
|
/// mark the start of a region for the specified scoping descriptor.
|
|
void DIFactory::InsertRegionStart(DIDescriptor D, BasicBlock *BB) {
|
|
// Lazily construct llvm.dbg.region.start function.
|
|
if (!RegionStartFn)
|
|
RegionStartFn = Intrinsic::getDeclaration(&M, Intrinsic::dbg_region_start);
|
|
|
|
// Call llvm.dbg.func.start.
|
|
CallInst::Create(RegionStartFn, getCastToEmpty(D), "", BB);
|
|
}
|
|
|
|
/// InsertRegionEnd - Insert a new llvm.dbg.region.end intrinsic call to
|
|
/// mark the end of a region for the specified scoping descriptor.
|
|
void DIFactory::InsertRegionEnd(DIDescriptor D, BasicBlock *BB) {
|
|
// Lazily construct llvm.dbg.region.end function.
|
|
if (!RegionEndFn)
|
|
RegionEndFn = Intrinsic::getDeclaration(&M, Intrinsic::dbg_region_end);
|
|
|
|
// Call llvm.dbg.region.end.
|
|
CallInst::Create(RegionEndFn, getCastToEmpty(D), "", BB);
|
|
}
|
|
|
|
/// InsertDeclare - Insert a new llvm.dbg.declare intrinsic call.
|
|
void DIFactory::InsertDeclare(Value *Storage, DIVariable D, BasicBlock *BB) {
|
|
// Cast the storage to a {}* for the call to llvm.dbg.declare.
|
|
Storage = new BitCastInst(Storage, EmptyStructPtr, "", BB);
|
|
|
|
if (!DeclareFn)
|
|
DeclareFn = Intrinsic::getDeclaration(&M, Intrinsic::dbg_declare);
|
|
|
|
Value *Args[] = { Storage, getCastToEmpty(D) };
|
|
CallInst::Create(DeclareFn, Args, Args+2, "", BB);
|
|
}
|
|
|
|
namespace llvm {
|
|
/// findStopPoint - Find the stoppoint coressponding to this instruction, that
|
|
/// is the stoppoint that dominates this instruction.
|
|
const DbgStopPointInst *findStopPoint(const Instruction *Inst) {
|
|
if (const DbgStopPointInst *DSI = dyn_cast<DbgStopPointInst>(Inst))
|
|
return DSI;
|
|
|
|
const BasicBlock *BB = Inst->getParent();
|
|
BasicBlock::const_iterator I = Inst, B;
|
|
while (BB) {
|
|
B = BB->begin();
|
|
|
|
// A BB consisting only of a terminator can't have a stoppoint.
|
|
while (I != B) {
|
|
--I;
|
|
if (const DbgStopPointInst *DSI = dyn_cast<DbgStopPointInst>(I))
|
|
return DSI;
|
|
}
|
|
|
|
// This BB didn't have a stoppoint: if there is only one predecessor, look
|
|
// for a stoppoint there. We could use getIDom(), but that would require
|
|
// dominator info.
|
|
BB = I->getParent()->getUniquePredecessor();
|
|
if (BB)
|
|
I = BB->getTerminator();
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/// findBBStopPoint - Find the stoppoint corresponding to first real
|
|
/// (non-debug intrinsic) instruction in this Basic Block, and return the
|
|
/// stoppoint for it.
|
|
const DbgStopPointInst *findBBStopPoint(const BasicBlock *BB) {
|
|
for(BasicBlock::const_iterator I = BB->begin(), E = BB->end(); I != E; ++I)
|
|
if (const DbgStopPointInst *DSI = dyn_cast<DbgStopPointInst>(I))
|
|
return DSI;
|
|
|
|
// Fallback to looking for stoppoint of unique predecessor. Useful if this
|
|
// BB contains no stoppoints, but unique predecessor does.
|
|
BB = BB->getUniquePredecessor();
|
|
if (BB)
|
|
return findStopPoint(BB->getTerminator());
|
|
|
|
return 0;
|
|
}
|
|
|
|
Value *findDbgGlobalDeclare(GlobalVariable *V) {
|
|
const Module *M = V->getParent();
|
|
LLVMContext& Context = M->getContext();
|
|
|
|
const Type *Ty = M->getTypeByName("llvm.dbg.global_variable.type");
|
|
if (!Ty) return 0;
|
|
|
|
Ty = Context.getPointerType(Ty, 0);
|
|
|
|
Value *Val = V->stripPointerCasts();
|
|
for (Value::use_iterator I = Val->use_begin(), E = Val->use_end();
|
|
I != E; ++I) {
|
|
if (ConstantExpr *CE = dyn_cast<ConstantExpr>(I)) {
|
|
if (CE->getOpcode() == Instruction::BitCast) {
|
|
Value *VV = CE;
|
|
|
|
while (VV->hasOneUse())
|
|
VV = *VV->use_begin();
|
|
|
|
if (VV->getType() == Ty)
|
|
return VV;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (Val->getType() == Ty)
|
|
return Val;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/// Finds the llvm.dbg.declare intrinsic corresponding to this value if any.
|
|
/// It looks through pointer casts too.
|
|
const DbgDeclareInst *findDbgDeclare(const Value *V, bool stripCasts) {
|
|
if (stripCasts) {
|
|
V = V->stripPointerCasts();
|
|
|
|
// Look for the bitcast.
|
|
for (Value::use_const_iterator I = V->use_begin(), E =V->use_end();
|
|
I != E; ++I)
|
|
if (isa<BitCastInst>(I))
|
|
return findDbgDeclare(*I, false);
|
|
|
|
return 0;
|
|
}
|
|
|
|
// Find llvm.dbg.declare among uses of the instruction.
|
|
for (Value::use_const_iterator I = V->use_begin(), E =V->use_end();
|
|
I != E; ++I)
|
|
if (const DbgDeclareInst *DDI = dyn_cast<DbgDeclareInst>(I))
|
|
return DDI;
|
|
|
|
return 0;
|
|
}
|
|
|
|
bool getLocationInfo(const Value *V, std::string &DisplayName,
|
|
std::string &Type, unsigned &LineNo, std::string &File,
|
|
std::string &Dir) {
|
|
DICompileUnit Unit;
|
|
DIType TypeD;
|
|
|
|
if (GlobalVariable *GV = dyn_cast<GlobalVariable>(const_cast<Value*>(V))) {
|
|
Value *DIGV = findDbgGlobalDeclare(GV);
|
|
if (!DIGV) return false;
|
|
DIGlobalVariable Var(cast<GlobalVariable>(DIGV));
|
|
|
|
Var.getDisplayName(DisplayName);
|
|
LineNo = Var.getLineNumber();
|
|
Unit = Var.getCompileUnit();
|
|
TypeD = Var.getType();
|
|
} else {
|
|
const DbgDeclareInst *DDI = findDbgDeclare(V);
|
|
if (!DDI) return false;
|
|
DIVariable Var(cast<GlobalVariable>(DDI->getVariable()));
|
|
|
|
Var.getName(DisplayName);
|
|
LineNo = Var.getLineNumber();
|
|
Unit = Var.getCompileUnit();
|
|
TypeD = Var.getType();
|
|
}
|
|
|
|
TypeD.getName(Type);
|
|
Unit.getFilename(File);
|
|
Unit.getDirectory(Dir);
|
|
return true;
|
|
}
|
|
|
|
/// CollectDebugInfoAnchors - Collect debugging information anchors.
|
|
void CollectDebugInfoAnchors(Module &M,
|
|
SmallVector<GlobalVariable *, 2> &CUs,
|
|
SmallVector<GlobalVariable *, 4> &GVs,
|
|
SmallVector<GlobalVariable *, 4> &SPs) {
|
|
|
|
for (Module::global_iterator GVI = M.global_begin(), E = M.global_end();
|
|
GVI != E; GVI++) {
|
|
GlobalVariable *GV = GVI;
|
|
if (GV->hasName() && strncmp(GV->getNameStart(), "llvm.dbg", 8) == 0
|
|
&& GV->isConstant() && GV->hasInitializer()) {
|
|
DICompileUnit C(GV);
|
|
if (C.isNull() == false) {
|
|
CUs.push_back(GV);
|
|
continue;
|
|
}
|
|
DIGlobalVariable G(GV);
|
|
if (G.isNull() == false) {
|
|
GVs.push_back(GV);
|
|
continue;
|
|
}
|
|
DISubprogram S(GV);
|
|
if (S.isNull() == false) {
|
|
SPs.push_back(GV);
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/// isValidDebugInfoIntrinsic - Return true if SPI is a valid debug
|
|
/// info intrinsic.
|
|
bool isValidDebugInfoIntrinsic(DbgStopPointInst &SPI,
|
|
CodeGenOpt::Level OptLev) {
|
|
return DIDescriptor::ValidDebugInfo(SPI.getContext(), OptLev);
|
|
}
|
|
|
|
/// isValidDebugInfoIntrinsic - Return true if FSI is a valid debug
|
|
/// info intrinsic.
|
|
bool isValidDebugInfoIntrinsic(DbgFuncStartInst &FSI,
|
|
CodeGenOpt::Level OptLev) {
|
|
return DIDescriptor::ValidDebugInfo(FSI.getSubprogram(), OptLev);
|
|
}
|
|
|
|
/// isValidDebugInfoIntrinsic - Return true if RSI is a valid debug
|
|
/// info intrinsic.
|
|
bool isValidDebugInfoIntrinsic(DbgRegionStartInst &RSI,
|
|
CodeGenOpt::Level OptLev) {
|
|
return DIDescriptor::ValidDebugInfo(RSI.getContext(), OptLev);
|
|
}
|
|
|
|
/// isValidDebugInfoIntrinsic - Return true if REI is a valid debug
|
|
/// info intrinsic.
|
|
bool isValidDebugInfoIntrinsic(DbgRegionEndInst &REI,
|
|
CodeGenOpt::Level OptLev) {
|
|
return DIDescriptor::ValidDebugInfo(REI.getContext(), OptLev);
|
|
}
|
|
|
|
|
|
/// isValidDebugInfoIntrinsic - Return true if DI is a valid debug
|
|
/// info intrinsic.
|
|
bool isValidDebugInfoIntrinsic(DbgDeclareInst &DI,
|
|
CodeGenOpt::Level OptLev) {
|
|
return DIDescriptor::ValidDebugInfo(DI.getVariable(), OptLev);
|
|
}
|
|
|
|
/// ExtractDebugLocation - Extract debug location information
|
|
/// from llvm.dbg.stoppoint intrinsic.
|
|
DebugLoc ExtractDebugLocation(DbgStopPointInst &SPI,
|
|
DebugLocTracker &DebugLocInfo) {
|
|
DebugLoc DL;
|
|
Value *Context = SPI.getContext();
|
|
|
|
// If this location is already tracked then use it.
|
|
DebugLocTuple Tuple(cast<GlobalVariable>(Context), SPI.getLine(),
|
|
SPI.getColumn());
|
|
DenseMap<DebugLocTuple, unsigned>::iterator II
|
|
= DebugLocInfo.DebugIdMap.find(Tuple);
|
|
if (II != DebugLocInfo.DebugIdMap.end())
|
|
return DebugLoc::get(II->second);
|
|
|
|
// Add a new location entry.
|
|
unsigned Id = DebugLocInfo.DebugLocations.size();
|
|
DebugLocInfo.DebugLocations.push_back(Tuple);
|
|
DebugLocInfo.DebugIdMap[Tuple] = Id;
|
|
|
|
return DebugLoc::get(Id);
|
|
}
|
|
|
|
/// ExtractDebugLocation - Extract debug location information
|
|
/// from llvm.dbg.func_start intrinsic.
|
|
DebugLoc ExtractDebugLocation(DbgFuncStartInst &FSI,
|
|
DebugLocTracker &DebugLocInfo) {
|
|
DebugLoc DL;
|
|
Value *SP = FSI.getSubprogram();
|
|
|
|
DISubprogram Subprogram(cast<GlobalVariable>(SP));
|
|
unsigned Line = Subprogram.getLineNumber();
|
|
DICompileUnit CU(Subprogram.getCompileUnit());
|
|
|
|
// If this location is already tracked then use it.
|
|
DebugLocTuple Tuple(CU.getGV(), Line, /* Column */ 0);
|
|
DenseMap<DebugLocTuple, unsigned>::iterator II
|
|
= DebugLocInfo.DebugIdMap.find(Tuple);
|
|
if (II != DebugLocInfo.DebugIdMap.end())
|
|
return DebugLoc::get(II->second);
|
|
|
|
// Add a new location entry.
|
|
unsigned Id = DebugLocInfo.DebugLocations.size();
|
|
DebugLocInfo.DebugLocations.push_back(Tuple);
|
|
DebugLocInfo.DebugIdMap[Tuple] = Id;
|
|
|
|
return DebugLoc::get(Id);
|
|
}
|
|
|
|
/// isInlinedFnStart - Return true if FSI is starting an inlined function.
|
|
bool isInlinedFnStart(DbgFuncStartInst &FSI, const Function *CurrentFn) {
|
|
DISubprogram Subprogram(cast<GlobalVariable>(FSI.getSubprogram()));
|
|
if (Subprogram.describes(CurrentFn))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
/// isInlinedFnEnd - Return true if REI is ending an inlined function.
|
|
bool isInlinedFnEnd(DbgRegionEndInst &REI, const Function *CurrentFn) {
|
|
DISubprogram Subprogram(cast<GlobalVariable>(REI.getContext()));
|
|
if (Subprogram.isNull() || Subprogram.describes(CurrentFn))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
}
|