forked from OSchip/llvm-project
275 lines
11 KiB
C++
275 lines
11 KiB
C++
//===-- llvm/VMCore/DebugInfoBuilder.cpp - ----------------------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file contains the definition of the DebugInfoBuilder class, which is
|
|
// a helper class used to construct source level debugging information.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include <llvm/Support/DebugInfoBuilder.h>
|
|
#include <llvm/DerivedTypes.h>
|
|
#include <llvm/Constants.h>
|
|
#include <llvm/GlobalVariable.h>
|
|
#include <llvm/Module.h>
|
|
#include <llvm/Support/Dwarf.h>
|
|
#include <llvm/System/Path.h>
|
|
|
|
using namespace llvm;
|
|
|
|
namespace {
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Debug version -- copied from MachineModuleInfo (for now), in order to avoid
|
|
// creating a dependency on CodeGen. These declarations really should be moved
|
|
// to a better place where modules can get at them without being dependent on
|
|
// CodeGen.
|
|
enum {
|
|
LLVMDebugVersion = (6 << 16), // Current version of debug information.
|
|
LLVMDebugVersion5 = (5 << 16), // Constant for version 5.
|
|
LLVMDebugVersion4 = (4 << 16), // Constant for version 4.
|
|
LLVMDebugVersionMask = 0xffff0000 // Mask for version number.
|
|
};
|
|
|
|
const char ANCHOR_TYPE_NAME[] = "llvm.dbg.anchor.type";
|
|
const char COMPILE_UNIT_ANCHOR_NAME[] = "llvm.dbg.compile_units";
|
|
const char GLOBAL_VAR_ANCHOR_NAME[] = "llvm.dbg.global_variables";
|
|
const char SUBPROGRAM_ANCHOR_NAME[] = "llvm.dbg.subprograms";
|
|
const char COMPILE_UNIT_TYPE_NAME[] = "llvm.dbg.compile_unit.type";
|
|
const char COMPILE_UNIT_NAME[] = "llvm.dbg.compile_unit";
|
|
const char SUBPROGRAM_NAME[] = "llvm.dbg.subprogram";
|
|
const char BASICTYPE_NAME[] = "llvm.dbg.basictype";
|
|
const char DERIVEDTYPE_NAME[] = "llvm.dbg.derivedtype";
|
|
|
|
} // end anonymous namespace
|
|
|
|
DebugInfoBuilder::DebugInfoBuilder() {
|
|
anyPtrType = PointerType::getUnqual(StructType::get(NULL, NULL));
|
|
anchorType = StructType::get(Type::Int32Ty, Type::Int32Ty, NULL);
|
|
}
|
|
|
|
GlobalVariable * DebugInfoBuilder::createAnchor(unsigned anchorTag,
|
|
const char * anchorName) {
|
|
|
|
std::vector<Constant *> values;
|
|
values.push_back(ConstantInt::get(Type::Int32Ty, LLVMDebugVersion));
|
|
values.push_back(ConstantInt::get(Type::Int32Ty, anchorTag));
|
|
|
|
return new GlobalVariable(anchorType, true, GlobalValue::LinkOnceLinkage,
|
|
ConstantStruct::get(anchorType, values), anchorName, module);
|
|
}
|
|
|
|
// Calculate the size of the specified LLVM type.
|
|
Constant * DebugInfoBuilder::getSize(const Type * type) {
|
|
Constant * one = ConstantInt::get(Type::Int32Ty, 1);
|
|
return ConstantExpr::getPtrToInt(
|
|
ConstantExpr::getGetElementPtr(
|
|
ConstantPointerNull::get(PointerType::getUnqual(type)),
|
|
&one, 1), Type::Int32Ty);
|
|
}
|
|
|
|
Constant * DebugInfoBuilder::getAlignment(const Type * type) {
|
|
// Calculates the alignment of T using "sizeof({i8, T}) - sizeof(T)"
|
|
return ConstantExpr::getSub(
|
|
getSize(StructType::get(Type::Int8Ty, type, NULL)),
|
|
getSize(type));
|
|
}
|
|
|
|
void DebugInfoBuilder::setModule(Module * m) {
|
|
module = m;
|
|
module->addTypeName(ANCHOR_TYPE_NAME, anchorType);
|
|
|
|
compileUnitAnchor = module->getGlobalVariable(COMPILE_UNIT_ANCHOR_NAME);
|
|
if (compileUnitAnchor == NULL) {
|
|
compileUnitAnchor =
|
|
createAnchor(dwarf::DW_TAG_compile_unit, COMPILE_UNIT_ANCHOR_NAME);
|
|
}
|
|
|
|
globalVariableAnchor = module->getGlobalVariable(GLOBAL_VAR_ANCHOR_NAME);
|
|
if (globalVariableAnchor == NULL) {
|
|
globalVariableAnchor =
|
|
createAnchor(dwarf::DW_TAG_compile_unit, GLOBAL_VAR_ANCHOR_NAME);
|
|
}
|
|
|
|
subprogramAnchor = module->getGlobalVariable(SUBPROGRAM_ANCHOR_NAME);
|
|
if (subprogramAnchor == NULL) {
|
|
subprogramAnchor =
|
|
createAnchor(dwarf::DW_TAG_compile_unit, SUBPROGRAM_ANCHOR_NAME);
|
|
}
|
|
|
|
compileUnit = module->getGlobalVariable(COMPILE_UNIT_NAME);
|
|
setContext(compileUnit);
|
|
}
|
|
|
|
GlobalVariable * DebugInfoBuilder::createCompileUnitDescriptor(unsigned langId,
|
|
const sys::Path & srcPath, const std::string & producer) {
|
|
|
|
if (compileUnit == NULL) {
|
|
std::vector<Constant *> values;
|
|
values.push_back(ConstantInt::get(
|
|
Type::Int32Ty, LLVMDebugVersion + dwarf::DW_TAG_compile_unit));
|
|
values.push_back(
|
|
ConstantExpr::getBitCast(compileUnitAnchor, anyPtrType));
|
|
values.push_back(ConstantInt::get(Type::Int32Ty, langId));
|
|
values.push_back(ConstantArray::get(srcPath.getLast()));
|
|
values.push_back(ConstantArray::get(srcPath.getDirname() + "/"));
|
|
values.push_back(ConstantArray::get(producer));
|
|
|
|
Constant * structVal = ConstantStruct::get(values, false);
|
|
compileUnit = new GlobalVariable(structVal->getType(), true,
|
|
GlobalValue::InternalLinkage, structVal, COMPILE_UNIT_NAME, module);
|
|
}
|
|
|
|
setContext(compileUnit);
|
|
return compileUnit;
|
|
}
|
|
|
|
GlobalVariable * DebugInfoBuilder::createSubProgramDescriptor(
|
|
const std::string & name,
|
|
const std::string & qualifiedName,
|
|
unsigned line,
|
|
GlobalVariable * typeDesc,
|
|
bool isInternal,
|
|
bool isDefined) {
|
|
|
|
assert(compileUnit != NULL);
|
|
assert(subprogramAnchor != NULL);
|
|
|
|
std::vector<Constant *> values;
|
|
values.push_back(ConstantInt::get(
|
|
Type::Int32Ty, LLVMDebugVersion + dwarf::DW_TAG_subprogram));
|
|
values.push_back(ConstantExpr::getBitCast(subprogramAnchor, anyPtrType));
|
|
values.push_back(ConstantExpr::getBitCast(context, anyPtrType));
|
|
values.push_back(ConstantArray::get(name));
|
|
values.push_back(ConstantArray::get(qualifiedName));
|
|
values.push_back(ConstantArray::get(qualifiedName));
|
|
values.push_back(ConstantExpr::getBitCast(compileUnit, anyPtrType));
|
|
values.push_back(ConstantInt::get(Type::Int32Ty, line));
|
|
values.push_back(typeDesc ?
|
|
ConstantExpr::getBitCast(typeDesc, anyPtrType) :
|
|
ConstantPointerNull::get(anyPtrType));
|
|
values.push_back(ConstantInt::get(Type::Int1Ty, isInternal));
|
|
values.push_back(ConstantInt::get(Type::Int1Ty, isDefined));
|
|
|
|
Constant * structVal = ConstantStruct::get(values, false);
|
|
return new GlobalVariable(structVal->getType(), true,
|
|
GlobalValue::InternalLinkage, structVal, SUBPROGRAM_NAME, module);
|
|
}
|
|
|
|
GlobalVariable * DebugInfoBuilder::createBasicTypeDescriptor(
|
|
std::string & name,
|
|
unsigned line,
|
|
unsigned sizeInBits,
|
|
unsigned alignmentInBits,
|
|
unsigned offsetInBits,
|
|
unsigned typeEncoding) {
|
|
|
|
std::vector<Constant *> values;
|
|
values.push_back(ConstantInt::get(
|
|
Type::Int32Ty, LLVMDebugVersion + dwarf::DW_TAG_base_type));
|
|
values.push_back(ConstantExpr::getBitCast(context, anyPtrType));
|
|
values.push_back(ConstantArray::get(name));
|
|
values.push_back(ConstantExpr::getBitCast(compileUnit, anyPtrType));
|
|
values.push_back(ConstantInt::get(Type::Int32Ty, line));
|
|
values.push_back(ConstantInt::get(Type::Int32Ty, sizeInBits));
|
|
values.push_back(ConstantInt::get(Type::Int32Ty, alignmentInBits));
|
|
values.push_back(ConstantInt::get(Type::Int32Ty, offsetInBits));
|
|
values.push_back(ConstantInt::get(Type::Int32Ty, typeEncoding));
|
|
|
|
Constant * structVal = ConstantStruct::get(values, false);
|
|
return new GlobalVariable(structVal->getType(), true,
|
|
GlobalValue::InternalLinkage, structVal, BASICTYPE_NAME, module);
|
|
}
|
|
|
|
GlobalVariable * DebugInfoBuilder::createIntegerTypeDescriptor(
|
|
std::string & name, const IntegerType * type, bool isSigned) {
|
|
|
|
std::vector<Constant *> values;
|
|
values.push_back(ConstantInt::get(
|
|
Type::Int32Ty, LLVMDebugVersion + dwarf::DW_TAG_base_type));
|
|
values.push_back(ConstantPointerNull::get(anyPtrType));
|
|
values.push_back(ConstantArray::get(name));
|
|
values.push_back(ConstantPointerNull::get(anyPtrType));
|
|
values.push_back(ConstantInt::get(Type::Int32Ty, 0));
|
|
values.push_back(ConstantInt::get(Type::Int32Ty, type->getBitWidth()));
|
|
values.push_back(getAlignment(type));
|
|
values.push_back(ConstantInt::get(Type::Int32Ty, 0));
|
|
values.push_back(ConstantInt::get(Type::Int32Ty,
|
|
isSigned ? dwarf::DW_ATE_signed_char : dwarf::DW_ATE_unsigned_char));
|
|
|
|
Constant * structVal = ConstantStruct::get(values, false);
|
|
return new GlobalVariable(structVal->getType(), true,
|
|
GlobalValue::InternalLinkage, structVal, BASICTYPE_NAME, module);
|
|
}
|
|
|
|
GlobalVariable * DebugInfoBuilder::createCharacterTypeDescriptor(
|
|
std::string & name, const IntegerType * type, bool isSigned) {
|
|
|
|
std::vector<Constant *> values;
|
|
values.push_back(ConstantInt::get(
|
|
Type::Int32Ty, LLVMDebugVersion + dwarf::DW_TAG_base_type));
|
|
values.push_back(ConstantPointerNull::get(anyPtrType));
|
|
values.push_back(ConstantArray::get(name));
|
|
values.push_back(ConstantPointerNull::get(anyPtrType));
|
|
values.push_back(ConstantInt::get(Type::Int32Ty, 0));
|
|
values.push_back(ConstantInt::get(Type::Int32Ty, type->getBitWidth()));
|
|
values.push_back(getAlignment(type));
|
|
values.push_back(ConstantInt::get(Type::Int32Ty, 0/*offsetInBits*/));
|
|
values.push_back(ConstantInt::get(Type::Int32Ty,
|
|
isSigned ? dwarf::DW_ATE_signed_char : dwarf::DW_ATE_unsigned_char));
|
|
|
|
Constant * structVal = ConstantStruct::get(values, false);
|
|
return new GlobalVariable(structVal->getType(), true,
|
|
GlobalValue::InternalLinkage, structVal, BASICTYPE_NAME, module);
|
|
}
|
|
|
|
GlobalVariable * DebugInfoBuilder::createFloatTypeDescriptor(
|
|
std::string & name, const Type * type) {
|
|
|
|
std::vector<Constant *> values;
|
|
values.push_back(ConstantInt::get(
|
|
Type::Int32Ty, LLVMDebugVersion + dwarf::DW_TAG_base_type));
|
|
values.push_back(ConstantPointerNull::get(anyPtrType));
|
|
values.push_back(ConstantArray::get(name));
|
|
values.push_back(ConstantPointerNull::get(anyPtrType));
|
|
values.push_back(ConstantInt::get(Type::Int32Ty, 0));
|
|
values.push_back(getSize(type));
|
|
values.push_back(getAlignment(type));
|
|
values.push_back(ConstantInt::get(Type::Int32Ty, 0/*offsetInBits*/));
|
|
values.push_back(ConstantInt::get(Type::Int32Ty, dwarf::DW_ATE_float));
|
|
|
|
Constant * structVal = ConstantStruct::get(values, false);
|
|
return new GlobalVariable(structVal->getType(), true,
|
|
GlobalValue::InternalLinkage, structVal, BASICTYPE_NAME, module);
|
|
}
|
|
|
|
GlobalVariable * DebugInfoBuilder::createPointerTypeDescriptor(
|
|
std::string & name,
|
|
GlobalVariable * referenceType,
|
|
const PointerType * type,
|
|
unsigned line) {
|
|
|
|
std::vector<Constant *> values;
|
|
values.push_back(ConstantInt::get(
|
|
Type::Int32Ty, dwarf::DW_TAG_pointer_type + LLVMDebugVersion));
|
|
values.push_back(
|
|
context ? ConstantExpr::getBitCast(context, anyPtrType) : NULL);
|
|
values.push_back(ConstantArray::get(name));
|
|
values.push_back(
|
|
compileUnit ? ConstantExpr::getBitCast(compileUnit, anyPtrType) : NULL);
|
|
values.push_back(ConstantInt::get(Type::Int32Ty, line));
|
|
values.push_back(getSize(type));
|
|
values.push_back(getAlignment(type));
|
|
values.push_back(ConstantInt::get(Type::Int32Ty, 0));
|
|
values.push_back(referenceType);
|
|
|
|
Constant * structVal = ConstantStruct::get(values, false);
|
|
return new GlobalVariable(structVal->getType(), true,
|
|
GlobalValue::InternalLinkage, structVal, DERIVEDTYPE_NAME, module);
|
|
}
|