mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-24 09:29:42 +00:00
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80648 91177308-0d34-0410-b5e6-96231b3b80d8
1256 lines
39 KiB
C++
1256 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/ADT/SmallPtrSet.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/raw_ostream.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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/// FIXME : Add DIDescriptor.isValid()
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bool DIDescriptor::ValidDebugInfo(MDNode *N, CodeGenOpt::Level OptLevel) {
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if (!N)
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return false;
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DIDescriptor DI(N);
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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(N).Verify() && "Invalid DebugInfo value");
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break;
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case DW_TAG_compile_unit:
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assert(DICompileUnit(N).Verify() && "Invalid DebugInfo value");
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break;
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case DW_TAG_subprogram:
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assert(DISubprogram(N).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(MDNode *N, unsigned RequiredTag) {
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DbgNode = N;
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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 (N && getTag() != RequiredTag) {
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DbgNode = 0;
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}
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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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Result.clear();
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if (DbgNode == 0)
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return Result;
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if (Elt < DbgNode->getNumElements())
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if (MDString *MDS = dyn_cast_or_null<MDString>(DbgNode->getElement(Elt))) {
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Result.assign(MDS->begin(), MDS->begin() + MDS->length());
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return Result;
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}
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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 (DbgNode == 0)
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return 0;
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if (Elt < DbgNode->getNumElements())
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if (ConstantInt *CI = dyn_cast<ConstantInt>(DbgNode->getElement(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 (DbgNode == 0)
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return DIDescriptor();
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if (Elt < DbgNode->getNumElements() && DbgNode->getElement(Elt))
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return DIDescriptor(dyn_cast<MDNode>(DbgNode->getElement(Elt)));
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return DIDescriptor();
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}
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GlobalVariable *DIDescriptor::getGlobalVariableField(unsigned Elt) const {
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if (DbgNode == 0)
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return 0;
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if (Elt < DbgNode->getNumElements())
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return dyn_cast<GlobalVariable>(DbgNode->getElement(Elt));
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return 0;
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}
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//===----------------------------------------------------------------------===//
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// Predicates
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//===----------------------------------------------------------------------===//
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/// isBasicType - Return true if the specified tag is legal for
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/// DIBasicType.
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bool DIDescriptor::isBasicType() const {
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assert (!isNull() && "Invalid descriptor!");
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unsigned Tag = getTag();
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return Tag == dwarf::DW_TAG_base_type;
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}
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/// isDerivedType - Return true if the specified tag is legal for DIDerivedType.
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bool DIDescriptor::isDerivedType() const {
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assert (!isNull() && "Invalid descriptor!");
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unsigned Tag = getTag();
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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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// CompositeTypes are currently modelled as DerivedTypes.
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return isCompositeType();
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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 DIDescriptor::isCompositeType() const {
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assert (!isNull() && "Invalid descriptor!");
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unsigned Tag = getTag();
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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 DIDescriptor::isVariable() const {
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assert (!isNull() && "Invalid descriptor!");
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unsigned Tag = getTag();
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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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/// isSubprogram - Return true if the specified tag is legal for
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/// DISubprogram.
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bool DIDescriptor::isSubprogram() const {
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assert (!isNull() && "Invalid descriptor!");
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unsigned Tag = getTag();
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return Tag == dwarf::DW_TAG_subprogram;
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}
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/// isGlobalVariable - Return true if the specified tag is legal for
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/// DIGlobalVariable.
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bool DIDescriptor::isGlobalVariable() const {
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assert (!isNull() && "Invalid descriptor!");
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unsigned Tag = getTag();
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return Tag == dwarf::DW_TAG_variable;
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}
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/// isScope - Return true if the specified tag is one of the scope
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/// related tag.
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bool DIDescriptor::isScope() const {
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assert (!isNull() && "Invalid descriptor!");
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unsigned Tag = getTag();
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switch (Tag) {
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case dwarf::DW_TAG_compile_unit:
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case dwarf::DW_TAG_lexical_block:
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case dwarf::DW_TAG_subprogram:
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return true;
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default:
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break;
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}
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return false;
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}
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/// isCompileUnit - Return true if the specified tag is DW_TAG_compile_unit.
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bool DIDescriptor::isCompileUnit() const {
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assert (!isNull() && "Invalid descriptor!");
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unsigned Tag = getTag();
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return Tag == dwarf::DW_TAG_compile_unit;
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}
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/// isLexicalBlock - Return true if the specified tag is DW_TAG_lexical_block.
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bool DIDescriptor::isLexicalBlock() const {
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assert (!isNull() && "Invalid descriptor!");
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unsigned Tag = getTag();
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return Tag == dwarf::DW_TAG_lexical_block;
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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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DIType::DIType(MDNode *N) : DIDescriptor(N) {
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if (!N) return;
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if (!isBasicType() && !isDerivedType() && !isCompositeType()) {
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DbgNode = 0;
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}
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}
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unsigned DIArray::getNumElements() const {
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assert (DbgNode && "Invalid DIArray");
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return DbgNode->getNumElements();
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}
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/// replaceAllUsesWith - Replace all uses of debug info referenced by
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/// this descriptor. After this completes, the current debug info value
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/// is erased.
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void DIDerivedType::replaceAllUsesWith(DIDescriptor &D) {
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if (isNull())
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return;
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assert (!D.isNull() && "Can not replace with null");
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DbgNode->replaceAllUsesWith(D.getNode());
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delete DbgNode;
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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 (F->getName() == Name)
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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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errs() << "[" << dwarf::TagString(getTag()) << "] ";
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errs().write_hex((intptr_t)DbgNode) << ']';
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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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errs() << " [" << dwarf::LanguageString(getLanguage()) << "] ";
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std::string Res1, Res2;
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errs() << " [" << 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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errs() << " [" << Res << "] ";
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unsigned Tag = getTag();
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errs() << " [" << dwarf::TagString(Tag) << "] ";
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// TODO : Print context
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getCompileUnit().dump();
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errs() << " ["
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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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errs() << " [private] ";
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else if (isProtected())
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errs() << " [protected] ";
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if (isForwardDecl())
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errs() << " [fwd] ";
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if (isBasicType())
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DIBasicType(DbgNode).dump();
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else if (isDerivedType())
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DIDerivedType(DbgNode).dump();
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else if (isCompositeType())
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DICompositeType(DbgNode).dump();
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else {
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errs() << "Invalid DIType\n";
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return;
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}
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errs() << "\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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errs() << " [" << 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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errs() << "\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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errs() << " [" << 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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errs() << " [" << Res << "] ";
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unsigned Tag = getTag();
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errs() << " [" << dwarf::TagString(Tag) << "] ";
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// TODO : Print context
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getCompileUnit().dump();
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errs() << " [" << getLineNumber() << "] ";
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if (isLocalToUnit())
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errs() << " [local] ";
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if (isDefinition())
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errs() << " [def] ";
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if (isGlobalVariable())
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DIGlobalVariable(DbgNode).dump();
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errs() << "\n";
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}
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/// dump - Print subprogram.
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void DISubprogram::dump() const {
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std::string Res;
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if (!getName(Res).empty())
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errs() << " [" << Res << "] ";
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unsigned Tag = getTag();
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errs() << " [" << dwarf::TagString(Tag) << "] ";
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// TODO : Print context
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getCompileUnit().dump();
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errs() << " [" << getLineNumber() << "] ";
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if (isLocalToUnit())
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errs() << " [local] ";
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if (isDefinition())
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errs() << " [def] ";
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errs() << "\n";
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}
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/// dump - Print global variable.
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void DIGlobalVariable::dump() const {
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errs() << " [";
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getGlobal()->dump();
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errs() << "] ";
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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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errs() << " [" << Res << "] ";
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getCompileUnit().dump();
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errs() << " [" << getLineNumber() << "] ";
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getType().dump();
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errs() << "\n";
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}
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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 = PointerType::getUnqual(StructType::get(VMContext));
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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 ConstantInt::get(Type::getInt32Ty(VMContext), TAG | LLVMDebugVersion);
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}
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|
|
//===----------------------------------------------------------------------===//
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// DIFactory: Primary Constructors
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//===----------------------------------------------------------------------===//
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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.
|
|
DIArray DIFactory::GetOrCreateArray(DIDescriptor *Tys, unsigned NumTys) {
|
|
SmallVector<Value*, 16> Elts;
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|
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if (NumTys == 0)
|
|
Elts.push_back(llvm::Constant::getNullValue(Type::getInt32Ty(VMContext)));
|
|
else
|
|
for (unsigned i = 0; i != NumTys; ++i)
|
|
Elts.push_back(Tys[i].getNode());
|
|
|
|
return DIArray(MDNode::get(VMContext,Elts.data(), Elts.size()));
|
|
}
|
|
|
|
/// GetOrCreateSubrange - Create a descriptor for a value range. This
|
|
/// implicitly uniques the values returned.
|
|
DISubrange DIFactory::GetOrCreateSubrange(int64_t Lo, int64_t Hi) {
|
|
Value *Elts[] = {
|
|
GetTagConstant(dwarf::DW_TAG_subrange_type),
|
|
ConstantInt::get(Type::getInt64Ty(VMContext), Lo),
|
|
ConstantInt::get(Type::getInt64Ty(VMContext), Hi)
|
|
};
|
|
|
|
return DISubrange(MDNode::get(VMContext, &Elts[0], 3));
|
|
}
|
|
|
|
|
|
|
|
/// 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) {
|
|
Value *Elts[] = {
|
|
GetTagConstant(dwarf::DW_TAG_compile_unit),
|
|
llvm::Constant::getNullValue(Type::getInt32Ty(VMContext)),
|
|
ConstantInt::get(Type::getInt32Ty(VMContext), LangID),
|
|
MDString::get(VMContext, Filename),
|
|
MDString::get(VMContext, Directory),
|
|
MDString::get(VMContext, Producer),
|
|
ConstantInt::get(Type::getInt1Ty(VMContext), isMain),
|
|
ConstantInt::get(Type::getInt1Ty(VMContext), isOptimized),
|
|
MDString::get(VMContext, Flags),
|
|
ConstantInt::get(Type::getInt32Ty(VMContext), RunTimeVer)
|
|
};
|
|
|
|
return DICompileUnit(MDNode::get(VMContext, &Elts[0], 10));
|
|
}
|
|
|
|
/// CreateEnumerator - Create a single enumerator value.
|
|
DIEnumerator DIFactory::CreateEnumerator(const std::string &Name, uint64_t Val){
|
|
Value *Elts[] = {
|
|
GetTagConstant(dwarf::DW_TAG_enumerator),
|
|
MDString::get(VMContext, Name),
|
|
ConstantInt::get(Type::getInt64Ty(VMContext), Val)
|
|
};
|
|
return DIEnumerator(MDNode::get(VMContext, &Elts[0], 3));
|
|
}
|
|
|
|
|
|
/// 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) {
|
|
Value *Elts[] = {
|
|
GetTagConstant(dwarf::DW_TAG_base_type),
|
|
Context.getNode(),
|
|
MDString::get(VMContext, Name),
|
|
CompileUnit.getNode(),
|
|
ConstantInt::get(Type::getInt32Ty(VMContext), LineNumber),
|
|
ConstantInt::get(Type::getInt64Ty(VMContext), SizeInBits),
|
|
ConstantInt::get(Type::getInt64Ty(VMContext), AlignInBits),
|
|
ConstantInt::get(Type::getInt64Ty(VMContext), OffsetInBits),
|
|
ConstantInt::get(Type::getInt32Ty(VMContext), Flags),
|
|
ConstantInt::get(Type::getInt32Ty(VMContext), Encoding)
|
|
};
|
|
return DIBasicType(MDNode::get(VMContext, &Elts[0], 10));
|
|
}
|
|
|
|
/// 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) {
|
|
Value *Elts[] = {
|
|
GetTagConstant(Tag),
|
|
Context.getNode(),
|
|
MDString::get(VMContext, Name),
|
|
CompileUnit.getNode(),
|
|
ConstantInt::get(Type::getInt32Ty(VMContext), LineNumber),
|
|
ConstantInt::get(Type::getInt64Ty(VMContext), SizeInBits),
|
|
ConstantInt::get(Type::getInt64Ty(VMContext), AlignInBits),
|
|
ConstantInt::get(Type::getInt64Ty(VMContext), OffsetInBits),
|
|
ConstantInt::get(Type::getInt32Ty(VMContext), Flags),
|
|
DerivedFrom.getNode(),
|
|
};
|
|
return DIDerivedType(MDNode::get(VMContext, &Elts[0], 10));
|
|
}
|
|
|
|
/// 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) {
|
|
|
|
Value *Elts[] = {
|
|
GetTagConstant(Tag),
|
|
Context.getNode(),
|
|
MDString::get(VMContext, Name),
|
|
CompileUnit.getNode(),
|
|
ConstantInt::get(Type::getInt32Ty(VMContext), LineNumber),
|
|
ConstantInt::get(Type::getInt64Ty(VMContext), SizeInBits),
|
|
ConstantInt::get(Type::getInt64Ty(VMContext), AlignInBits),
|
|
ConstantInt::get(Type::getInt64Ty(VMContext), OffsetInBits),
|
|
ConstantInt::get(Type::getInt32Ty(VMContext), Flags),
|
|
DerivedFrom.getNode(),
|
|
Elements.getNode(),
|
|
ConstantInt::get(Type::getInt32Ty(VMContext), RuntimeLang)
|
|
};
|
|
return DICompositeType(MDNode::get(VMContext, &Elts[0], 12));
|
|
}
|
|
|
|
|
|
/// 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) {
|
|
|
|
Value *Elts[] = {
|
|
GetTagConstant(dwarf::DW_TAG_subprogram),
|
|
llvm::Constant::getNullValue(Type::getInt32Ty(VMContext)),
|
|
Context.getNode(),
|
|
MDString::get(VMContext, Name),
|
|
MDString::get(VMContext, DisplayName),
|
|
MDString::get(VMContext, LinkageName),
|
|
CompileUnit.getNode(),
|
|
ConstantInt::get(Type::getInt32Ty(VMContext), LineNo),
|
|
Type.getNode(),
|
|
ConstantInt::get(Type::getInt1Ty(VMContext), isLocalToUnit),
|
|
ConstantInt::get(Type::getInt1Ty(VMContext), isDefinition)
|
|
};
|
|
return DISubprogram(MDNode::get(VMContext, &Elts[0], 11));
|
|
}
|
|
|
|
/// 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) {
|
|
Value *Elts[] = {
|
|
GetTagConstant(dwarf::DW_TAG_variable),
|
|
llvm::Constant::getNullValue(Type::getInt32Ty(VMContext)),
|
|
Context.getNode(),
|
|
MDString::get(VMContext, Name),
|
|
MDString::get(VMContext, DisplayName),
|
|
MDString::get(VMContext, LinkageName),
|
|
CompileUnit.getNode(),
|
|
ConstantInt::get(Type::getInt32Ty(VMContext), LineNo),
|
|
Type.getNode(),
|
|
ConstantInt::get(Type::getInt1Ty(VMContext), isLocalToUnit),
|
|
ConstantInt::get(Type::getInt1Ty(VMContext), isDefinition),
|
|
Val
|
|
};
|
|
|
|
Value *const *Vs = &Elts[0];
|
|
MDNode *Node = MDNode::get(VMContext,Vs, 12);
|
|
|
|
// Create a named metadata so that we do not lose this mdnode.
|
|
NamedMDNode *NMD = M.getOrInsertNamedMetadata("llvm.dbg.gv");
|
|
NMD->addElement(Node);
|
|
|
|
return DIGlobalVariable(Node);
|
|
}
|
|
|
|
|
|
/// 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) {
|
|
Value *Elts[] = {
|
|
GetTagConstant(Tag),
|
|
Context.getNode(),
|
|
MDString::get(VMContext, Name),
|
|
CompileUnit.getNode(),
|
|
ConstantInt::get(Type::getInt32Ty(VMContext), LineNo),
|
|
Type.getNode(),
|
|
};
|
|
return DIVariable(MDNode::get(VMContext, &Elts[0], 6));
|
|
}
|
|
|
|
|
|
/// CreateBlock - This creates a descriptor for a lexical block with the
|
|
/// specified parent VMContext.
|
|
DILexicalBlock DIFactory::CreateLexicalBlock(DIDescriptor Context) {
|
|
Value *Elts[] = {
|
|
GetTagConstant(dwarf::DW_TAG_lexical_block),
|
|
Context.getNode()
|
|
};
|
|
return DILexicalBlock(MDNode::get(VMContext, &Elts[0], 2));
|
|
}
|
|
|
|
/// CreateLocation - Creates a debug info location.
|
|
DILocation DIFactory::CreateLocation(unsigned LineNo, unsigned ColumnNo,
|
|
DIScope S, DILocation OrigLoc) {
|
|
Value *Elts[] = {
|
|
ConstantInt::get(Type::getInt32Ty(VMContext), LineNo),
|
|
ConstantInt::get(Type::getInt32Ty(VMContext), ColumnNo),
|
|
S.getNode(),
|
|
OrigLoc.getNode(),
|
|
};
|
|
return DILocation(MDNode::get(VMContext, &Elts[0], 4));
|
|
}
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// 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[] = {
|
|
ConstantInt::get(llvm::Type::getInt32Ty(VMContext), LineNo),
|
|
ConstantInt::get(llvm::Type::getInt32Ty(VMContext), ColNo),
|
|
CU.getNode()
|
|
};
|
|
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, SP.getNode(), "", 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, D.getNode(), "", 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, D.getNode(), "", 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, D.getNode() };
|
|
CallInst::Create(DeclareFn, Args, Args+2, "", BB);
|
|
}
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// DebugInfoFinder implementations.
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
/// processModule - Process entire module and collect debug info.
|
|
void DebugInfoFinder::processModule(Module &M) {
|
|
|
|
|
|
for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
|
|
for (Function::iterator FI = (*I).begin(), FE = (*I).end(); FI != FE; ++FI)
|
|
for (BasicBlock::iterator BI = (*FI).begin(), BE = (*FI).end(); BI != BE;
|
|
++BI) {
|
|
if (DbgStopPointInst *SPI = dyn_cast<DbgStopPointInst>(BI))
|
|
processStopPoint(SPI);
|
|
else if (DbgFuncStartInst *FSI = dyn_cast<DbgFuncStartInst>(BI))
|
|
processFuncStart(FSI);
|
|
else if (DbgRegionStartInst *DRS = dyn_cast<DbgRegionStartInst>(BI))
|
|
processRegionStart(DRS);
|
|
else if (DbgRegionEndInst *DRE = dyn_cast<DbgRegionEndInst>(BI))
|
|
processRegionEnd(DRE);
|
|
else if (DbgDeclareInst *DDI = dyn_cast<DbgDeclareInst>(BI))
|
|
processDeclare(DDI);
|
|
}
|
|
|
|
NamedMDNode *NMD = M.getNamedMetadata("llvm.dbg.gv");
|
|
if (!NMD)
|
|
return;
|
|
|
|
for (unsigned i = 0, e = NMD->getNumElements(); i != e; ++i) {
|
|
DIGlobalVariable DIG(cast<MDNode>(NMD->getElement(i)));
|
|
if (addGlobalVariable(DIG)) {
|
|
addCompileUnit(DIG.getCompileUnit());
|
|
processType(DIG.getType());
|
|
}
|
|
}
|
|
}
|
|
|
|
/// processType - Process DIType.
|
|
void DebugInfoFinder::processType(DIType DT) {
|
|
if (!addType(DT))
|
|
return;
|
|
|
|
addCompileUnit(DT.getCompileUnit());
|
|
if (DT.isCompositeType()) {
|
|
DICompositeType DCT(DT.getNode());
|
|
processType(DCT.getTypeDerivedFrom());
|
|
DIArray DA = DCT.getTypeArray();
|
|
if (!DA.isNull())
|
|
for (unsigned i = 0, e = DA.getNumElements(); i != e; ++i) {
|
|
DIDescriptor D = DA.getElement(i);
|
|
DIType TypeE = DIType(D.getNode());
|
|
if (!TypeE.isNull())
|
|
processType(TypeE);
|
|
else
|
|
processSubprogram(DISubprogram(D.getNode()));
|
|
}
|
|
} else if (DT.isDerivedType()) {
|
|
DIDerivedType DDT(DT.getNode());
|
|
if (!DDT.isNull())
|
|
processType(DDT.getTypeDerivedFrom());
|
|
}
|
|
}
|
|
|
|
/// processSubprogram - Process DISubprogram.
|
|
void DebugInfoFinder::processSubprogram(DISubprogram SP) {
|
|
if (SP.isNull())
|
|
return;
|
|
if (!addSubprogram(SP))
|
|
return;
|
|
addCompileUnit(SP.getCompileUnit());
|
|
processType(SP.getType());
|
|
}
|
|
|
|
/// processStopPoint - Process DbgStopPointInst.
|
|
void DebugInfoFinder::processStopPoint(DbgStopPointInst *SPI) {
|
|
MDNode *Context = dyn_cast<MDNode>(SPI->getContext());
|
|
addCompileUnit(DICompileUnit(Context));
|
|
}
|
|
|
|
/// processFuncStart - Process DbgFuncStartInst.
|
|
void DebugInfoFinder::processFuncStart(DbgFuncStartInst *FSI) {
|
|
MDNode *SP = dyn_cast<MDNode>(FSI->getSubprogram());
|
|
processSubprogram(DISubprogram(SP));
|
|
}
|
|
|
|
/// processRegionStart - Process DbgRegionStart.
|
|
void DebugInfoFinder::processRegionStart(DbgRegionStartInst *DRS) {
|
|
MDNode *SP = dyn_cast<MDNode>(DRS->getContext());
|
|
processSubprogram(DISubprogram(SP));
|
|
}
|
|
|
|
/// processRegionEnd - Process DbgRegionEnd.
|
|
void DebugInfoFinder::processRegionEnd(DbgRegionEndInst *DRE) {
|
|
MDNode *SP = dyn_cast<MDNode>(DRE->getContext());
|
|
processSubprogram(DISubprogram(SP));
|
|
}
|
|
|
|
/// processDeclare - Process DbgDeclareInst.
|
|
void DebugInfoFinder::processDeclare(DbgDeclareInst *DDI) {
|
|
DIVariable DV(cast<MDNode>(DDI->getVariable()));
|
|
if (DV.isNull())
|
|
return;
|
|
|
|
if (!NodesSeen.insert(DV.getNode()))
|
|
return;
|
|
|
|
addCompileUnit(DV.getCompileUnit());
|
|
processType(DV.getType());
|
|
}
|
|
|
|
/// addType - Add type into Tys.
|
|
bool DebugInfoFinder::addType(DIType DT) {
|
|
if (DT.isNull())
|
|
return false;
|
|
|
|
if (!NodesSeen.insert(DT.getNode()))
|
|
return false;
|
|
|
|
TYs.push_back(DT.getNode());
|
|
return true;
|
|
}
|
|
|
|
/// addCompileUnit - Add compile unit into CUs.
|
|
bool DebugInfoFinder::addCompileUnit(DICompileUnit CU) {
|
|
if (CU.isNull())
|
|
return false;
|
|
|
|
if (!NodesSeen.insert(CU.getNode()))
|
|
return false;
|
|
|
|
CUs.push_back(CU.getNode());
|
|
return true;
|
|
}
|
|
|
|
/// addGlobalVariable - Add global variable into GVs.
|
|
bool DebugInfoFinder::addGlobalVariable(DIGlobalVariable DIG) {
|
|
if (DIG.isNull())
|
|
return false;
|
|
|
|
if (!NodesSeen.insert(DIG.getNode()))
|
|
return false;
|
|
|
|
GVs.push_back(DIG.getNode());
|
|
return true;
|
|
}
|
|
|
|
// addSubprogram - Add subprgoram into SPs.
|
|
bool DebugInfoFinder::addSubprogram(DISubprogram SP) {
|
|
if (SP.isNull())
|
|
return false;
|
|
|
|
if (!NodesSeen.insert(SP.getNode()))
|
|
return false;
|
|
|
|
SPs.push_back(SP.getNode());
|
|
return true;
|
|
}
|
|
|
|
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();
|
|
NamedMDNode *NMD = M->getNamedMetadata("llvm.dbg.gv");
|
|
if (!NMD)
|
|
return 0;
|
|
|
|
for (unsigned i = 0, e = NMD->getNumElements(); i != e; ++i) {
|
|
DIGlobalVariable DIG(cast_or_null<MDNode>(NMD->getElement(i)));
|
|
if (DIG.isNull())
|
|
continue;
|
|
if (DIG.getGlobal() == V)
|
|
return DIG.getNode();
|
|
}
|
|
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<MDNode>(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<MDNode>(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;
|
|
}
|
|
|
|
/// 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<MDNode>(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<MDNode>(SP));
|
|
unsigned Line = Subprogram.getLineNumber();
|
|
DICompileUnit CU(Subprogram.getCompileUnit());
|
|
|
|
// If this location is already tracked then use it.
|
|
DebugLocTuple Tuple(CU.getNode(), 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<MDNode>(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<MDNode>(REI.getContext()));
|
|
if (Subprogram.isNull() || Subprogram.describes(CurrentFn))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
}
|