mirror of
https://github.com/ldc-developers/ldc.git
synced 2025-05-04 17:11:44 +03:00
593 lines
19 KiB
C++
593 lines
19 KiB
C++
#include "gen/llvm.h"
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#include "llvm/Support/Dwarf.h"
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#include "llvm/CodeGen/MachineModuleInfo.h"
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#include "declaration.h"
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#include "module.h"
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#include "mars.h"
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#include "gen/todebug.h"
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#include "gen/irstate.h"
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#include "gen/tollvm.h"
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#include "gen/logger.h"
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#include "ir/irmodule.h"
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using namespace llvm::dwarf;
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#define DBG_NULL ( LLConstant::getNullValue(DBG_TYPE) )
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#define DBG_TYPE ( getPtrToType(llvm::StructType::get(NULL,NULL)) )
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#define DBG_CAST(X) ( llvm::ConstantExpr::getBitCast(X, DBG_TYPE) )
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#define DBG_TAG(X) ( llvm::ConstantExpr::getAdd( DtoConstUint( X ), DtoConstUint( llvm::LLVMDebugVersion ) ) )
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//////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* Emits a global variable, LLVM Dwarf style.
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* @param type Type of variable.
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* @param values Initializers.
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* @param name Name.
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* @return The global variable.
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*/
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static LLGlobalVariable* emitDwarfGlobal(const LLStructType* type, const std::vector<LLConstant*> values, const char* name, bool linkonce=false)
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{
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LLConstant* c = llvm::ConstantStruct::get(type, values);
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LLGlobalValue::LinkageTypes linkage = linkonce ? LLGlobalValue::LinkOnceLinkage : LLGlobalValue::InternalLinkage;
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LLGlobalVariable* gv = new LLGlobalVariable(c->getType(), true, linkage, c, name, gIR->module);
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gv->setSection("llvm.metadata");
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return gv;
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}
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//////////////////////////////////////////////////////////////////////////////////////////////////
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static llvm::GlobalVariable* dbg_compile_units = 0;
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static llvm::GlobalVariable* dbg_global_variables = 0;
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static llvm::GlobalVariable* dbg_subprograms = 0;
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/**
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* Emits the Dwarf anchors that are used repeatedly by LLVM debug info.
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*/
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static void emitDwarfAnchors()
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{
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const llvm::StructType* anchorTy = isaStruct(gIR->module->getTypeByName("llvm.dbg.anchor.type"));
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std::vector<LLConstant*> vals(2);
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if (!gIR->module->getNamedGlobal("llvm.dbg.compile_units")) {
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vals[0] = DtoConstUint(llvm::LLVMDebugVersion);
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vals[1] = DtoConstUint(DW_TAG_compile_unit);
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dbg_compile_units = emitDwarfGlobal(anchorTy, vals, "llvm.dbg.compile_units", true);
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}
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if (!gIR->module->getNamedGlobal("llvm.dbg.global_variables")) {
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vals[0] = DtoConstUint(llvm::LLVMDebugVersion);
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vals[1] = DtoConstUint(DW_TAG_variable);
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dbg_global_variables = emitDwarfGlobal(anchorTy, vals, "llvm.dbg.global_variables", true);
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}
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if (!gIR->module->getNamedGlobal("llvm.dbg.subprograms")) {
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vals[0] = DtoConstUint(llvm::LLVMDebugVersion);
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vals[1] = DtoConstUint(DW_TAG_subprogram);
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dbg_subprograms = emitDwarfGlobal(anchorTy, vals, "llvm.dbg.subprograms", true);
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}
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}
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static LLConstant* getDwarfAnchor(dwarf_constants c)
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{
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emitDwarfAnchors();
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switch (c)
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{
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case DW_TAG_compile_unit:
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return dbg_compile_units;
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case DW_TAG_variable:
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return dbg_global_variables;
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case DW_TAG_subprogram:
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return dbg_subprograms;
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default:
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assert(0);
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}
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}
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//////////////////////////////////////////////////////////////////////////////////////////////////
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static const llvm::StructType* getDwarfCompileUnitType() {
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return isaStruct(gIR->module->getTypeByName("llvm.dbg.compile_unit.type"));
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}
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static const llvm::StructType* getDwarfSubProgramType() {
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return isaStruct(gIR->module->getTypeByName("llvm.dbg.subprogram.type"));
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}
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static const llvm::StructType* getDwarfVariableType() {
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return isaStruct(gIR->module->getTypeByName("llvm.dbg.variable.type"));
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}
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static const llvm::StructType* getDwarfDerivedTypeType() {
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return isaStruct(gIR->module->getTypeByName("llvm.dbg.derivedtype.type"));
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}
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static const llvm::StructType* getDwarfBasicTypeType() {
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return isaStruct(gIR->module->getTypeByName("llvm.dbg.basictype.type"));
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}
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static const llvm::StructType* getDwarfCompositeTypeType() {
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return isaStruct(gIR->module->getTypeByName("llvm.dbg.compositetype.type"));
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}
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static const llvm::StructType* getDwarfGlobalVariableType() {
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return isaStruct(gIR->module->getTypeByName("llvm.dbg.global_variable.type"));
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}
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//////////////////////////////////////////////////////////////////////////////////////////////////
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static LLGlobalVariable* dwarfCompileUnit(Module* m)
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{
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std::vector<LLConstant*> vals;
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vals.push_back(DBG_TAG(DW_TAG_compile_unit));
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vals.push_back(DBG_CAST(getDwarfAnchor(DW_TAG_compile_unit)));
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vals.push_back(DtoConstUint(DW_LANG_C));// _D)); // doesn't seem to work
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vals.push_back(DtoConstStringPtr(m->srcfile->name->toChars(), "llvm.metadata"));
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std::string srcpath(FileName::path(m->srcfile->name->toChars()));
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if (srcpath.empty()) {
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const char* str = get_current_dir_name();
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assert(str != NULL);
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srcpath = str;
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}
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vals.push_back(DtoConstStringPtr(srcpath.c_str(), "llvm.metadata"));
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vals.push_back(DtoConstStringPtr("LLVMDC (http://www.dsource.org/projects/llvmdc)", "llvm.metadata"));
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LLGlobalVariable* gv = emitDwarfGlobal(getDwarfCompileUnitType(), vals, "llvm.dbg.compile_unit");
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m->ir.irModule->dwarfCompileUnit = gv;
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return gv;
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}
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//////////////////////////////////////////////////////////////////////////////////////////////////
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static LLGlobalVariable* dwarfSubProgram(FuncDeclaration* fd, llvm::GlobalVariable* compileUnit)
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{
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std::vector<LLConstant*> vals;
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vals.push_back(DBG_TAG(DW_TAG_subprogram));
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vals.push_back(DBG_CAST(getDwarfAnchor(DW_TAG_subprogram)));
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vals.push_back(DBG_CAST(compileUnit));
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vals.push_back(DtoConstStringPtr(fd->toPrettyChars(), "llvm.metadata"));
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vals.push_back(vals.back());
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vals.push_back(DtoConstStringPtr(fd->mangle(), "llvm.metadata"));
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vals.push_back(DBG_CAST( DtoDwarfCompileUnit(fd->getModule()) ));
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vals.push_back(DtoConstUint(fd->loc.linnum));
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vals.push_back(DBG_NULL);
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vals.push_back(DtoConstBool(fd->protection == PROTprivate));
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vals.push_back(DtoConstBool(fd->getModule() == gIR->dmodule));
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return emitDwarfGlobal(getDwarfSubProgramType(), vals, "llvm.dbg.subprogram");
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}
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//////////////////////////////////////////////////////////////////////////////////////////////////
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static LLGlobalVariable* dwarfTypeDescription(Loc loc, Type* type, LLGlobalVariable* cu, const char* c_name);
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//////////////////////////////////////////////////////////////////////////////////////////////////
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static LLGlobalVariable* dwarfBasicType(Type* type, llvm::GlobalVariable* compileUnit)
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{
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Type* t = type->toBasetype();
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const LLType* T = DtoType(type);
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std::vector<LLConstant*> vals;
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// tag
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vals.push_back(DBG_TAG(DW_TAG_base_type));
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// context
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vals.push_back(DBG_CAST(compileUnit));
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// name
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vals.push_back(DtoConstStringPtr(type->toChars(), "llvm.metadata"));
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// compile unit where defined
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vals.push_back(DBG_NULL);
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// line number where defined
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vals.push_back(DtoConstInt(0));
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// size in bits
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vals.push_back(LLConstantInt::get(LLType::Int64Ty, getTypeBitSize(T), false));
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// alignment in bits
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vals.push_back(LLConstantInt::get(LLType::Int64Ty, getABITypeAlign(T)*8, false));
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// offset in bits
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vals.push_back(LLConstantInt::get(LLType::Int64Ty, 0, false));
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// FIXME: dont know what this is
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vals.push_back(DtoConstUint(0));
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// dwarf type
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unsigned id;
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if (t->isintegral())
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{
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if (type->isunsigned())
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id = DW_ATE_unsigned;
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else
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id = DW_ATE_signed;
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}
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else if (t->isfloating())
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{
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id = DW_ATE_float;
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}
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else
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{
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assert(0 && "unsupported basictype for debug info");
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}
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vals.push_back(DtoConstUint(id));
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return emitDwarfGlobal(getDwarfBasicTypeType(), vals, "llvm.dbg.basictype");
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}
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//////////////////////////////////////////////////////////////////////////////////////////////////
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static LLGlobalVariable* dwarfDerivedType(Loc loc, Type* type, llvm::GlobalVariable* compileUnit)
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{
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const LLType* T = DtoType(type);
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Type* t = DtoDType(type);
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// defaults
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LLConstant* name = getNullPtr(getVoidPtrType());
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// find tag
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unsigned tag;
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if (t->ty == Tpointer)
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{
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tag = DW_TAG_pointer_type;
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}
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else
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{
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assert(0 && "unsupported derivedtype for debug info");
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}
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std::vector<LLConstant*> vals;
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// tag
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vals.push_back(DBG_TAG(tag));
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// context
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vals.push_back(DBG_CAST(compileUnit));
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// name
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vals.push_back(name);
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// compile unit where defined
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vals.push_back(DBG_NULL);
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// line number where defined
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vals.push_back(DtoConstInt(0));
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// size in bits
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vals.push_back(LLConstantInt::get(LLType::Int64Ty, getTypeBitSize(T), false));
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// alignment in bits
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vals.push_back(LLConstantInt::get(LLType::Int64Ty, getABITypeAlign(T)*8, false));
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// offset in bits
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vals.push_back(LLConstantInt::get(LLType::Int64Ty, 0, false));
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// FIXME: dont know what this is
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vals.push_back(DtoConstUint(0));
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// base type
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Type* nt = t->nextOf();
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LLGlobalVariable* nTD = dwarfTypeDescription(loc, nt, compileUnit, NULL);
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if (nt->ty == Tvoid || !nTD)
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vals.push_back(DBG_NULL);
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else
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vals.push_back(DBG_CAST(nTD));
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return emitDwarfGlobal(getDwarfDerivedTypeType(), vals, "llvm.dbg.derivedtype");
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}
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//////////////////////////////////////////////////////////////////////////////////////////////////
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static LLGlobalVariable* dwarfMemberType(Loc loc, Type* type, llvm::GlobalVariable* compileUnit, const char* c_name, unsigned offset)
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{
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const LLType* T = DtoType(type);
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Type* t = DtoDType(type);
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// defaults
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LLConstant* name;
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if (c_name)
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name = DtoConstStringPtr(c_name, "llvm.metadata");
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else
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name = getNullPtr(getVoidPtrType());
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std::vector<LLConstant*> vals;
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// tag
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vals.push_back(DBG_TAG(DW_TAG_member));
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// context
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vals.push_back(DBG_CAST(compileUnit));
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// name
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vals.push_back(name);
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// compile unit where defined
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vals.push_back(DBG_NULL);
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// line number where defined
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vals.push_back(DtoConstInt(0));
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// size in bits
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vals.push_back(LLConstantInt::get(LLType::Int64Ty, getTypeBitSize(T), false));
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// alignment in bits
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vals.push_back(LLConstantInt::get(LLType::Int64Ty, getABITypeAlign(T)*8, false));
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// offset in bits
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vals.push_back(LLConstantInt::get(LLType::Int64Ty, offset*8, false));
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// FIXME: dont know what this is
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vals.push_back(DtoConstUint(0));
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// base type
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LLGlobalVariable* nTD = dwarfTypeDescription(loc, t, compileUnit, NULL);
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if (t->ty == Tvoid || !nTD)
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vals.push_back(DBG_NULL);
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else
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vals.push_back(DBG_CAST(nTD));
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return emitDwarfGlobal(getDwarfDerivedTypeType(), vals, "llvm.dbg.derivedtype");
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}
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//////////////////////////////////////////////////////////////////////////////////////////////////
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static LLGlobalVariable* dwarfCompositeType(Loc loc, Type* type, llvm::GlobalVariable* compileUnit)
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{
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const LLType* T = DtoType(type);
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Type* t = DtoDType(type);
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// defaults
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LLConstant* name = getNullPtr(getVoidPtrType());
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LLGlobalVariable* members = NULL;
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// prepare tag and members
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unsigned tag;
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if (t->ty == Tarray)
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{
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tag = DW_TAG_structure_type;
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LLGlobalVariable* len = dwarfMemberType(loc, Type::tsize_t, compileUnit, "length", 0);
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assert(len);
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LLGlobalVariable* ptr = dwarfMemberType(loc, t->nextOf()->pointerTo(), compileUnit, "ptr", global.params.is64bit?8:4);
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assert(ptr);
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const LLArrayType* at = LLArrayType::get(DBG_TYPE, 2);
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std::vector<LLConstant*> elems;
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elems.push_back(DBG_CAST(len));
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elems.push_back(DBG_CAST(ptr));
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// elems[0]->dump();
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// elems[1]->dump();
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// at->dump();
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LLConstant* ca = LLConstantArray::get(at, elems);
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members = new LLGlobalVariable(ca->getType(), true, LLGlobalValue::InternalLinkage, ca, ".array", gIR->module);
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members->setSection("llvm.metadata");
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}
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else
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{
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assert(0 && "unsupported compositetype for debug info");
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}
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std::vector<LLConstant*> vals;
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// tag
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vals.push_back(DBG_TAG(tag));
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// context
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vals.push_back(DBG_CAST(compileUnit));
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// name
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vals.push_back(name);
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// compile unit where defined
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vals.push_back(DBG_NULL);
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// line number where defined
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vals.push_back(DtoConstInt(0));
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// size in bits
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vals.push_back(LLConstantInt::get(LLType::Int64Ty, getTypeBitSize(T), false));
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// alignment in bits
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vals.push_back(LLConstantInt::get(LLType::Int64Ty, getABITypeAlign(T)*8, false));
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// offset in bits
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vals.push_back(LLConstantInt::get(LLType::Int64Ty, 0, false));
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// FIXME: dont know what this is
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vals.push_back(DtoConstUint(0));
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// FIXME: ditto
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vals.push_back(DBG_NULL);
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// members array
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if (members)
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vals.push_back(DBG_CAST(members));
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else
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vals.push_back(DBG_NULL);
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return emitDwarfGlobal(getDwarfCompositeTypeType(), vals, "llvm.dbg.compositetype");
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}
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//////////////////////////////////////////////////////////////////////////////////////////////////
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static LLGlobalVariable* dwarfGlobalVariable(LLGlobalVariable* ll, VarDeclaration* vd)
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{
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assert(vd->isDataseg());
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LLGlobalVariable* compileUnit = DtoDwarfCompileUnit(gIR->dmodule);
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std::vector<LLConstant*> vals;
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vals.push_back(DBG_TAG(DW_TAG_variable));
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vals.push_back(DBG_CAST(getDwarfAnchor(DW_TAG_variable)));
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vals.push_back(DBG_CAST(compileUnit));
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vals.push_back(DtoConstStringPtr(vd->mangle(), "llvm.metadata"));
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vals.push_back(DtoConstStringPtr(vd->toPrettyChars(), "llvm.metadata"));
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vals.push_back(DtoConstStringPtr(vd->toChars(), "llvm.metadata"));
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vals.push_back(DBG_CAST(DtoDwarfCompileUnit(vd->getModule())));
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vals.push_back(DtoConstUint(vd->loc.linnum));
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LLGlobalVariable* TY = dwarfTypeDescription(vd->loc, vd->type, compileUnit, NULL);
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vals.push_back(TY ? DBG_CAST(TY) : DBG_NULL);
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vals.push_back(DtoConstBool(vd->protection == PROTprivate));
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vals.push_back(DtoConstBool(vd->getModule() == gIR->dmodule));
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vals.push_back(DBG_CAST(ll));
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return emitDwarfGlobal(getDwarfGlobalVariableType(), vals, "llvm.dbg.global_variable");
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}
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static LLGlobalVariable* dwarfVariable(VarDeclaration* vd, LLGlobalVariable* typeDescr)
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{
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assert(!vd->isDataseg() && "static variable");
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unsigned tag;
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if (vd->isParameter())
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tag = DW_TAG_arg_variable;
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else
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tag = DW_TAG_auto_variable;
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std::vector<LLConstant*> vals(6);
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// tag
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vals[0] = DBG_TAG(tag);
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// context
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vals[1] = DBG_CAST(gIR->func()->dwarfSubProg);
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// name
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vals[2] = DtoConstStringPtr(vd->toChars(), "llvm.metadata");
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// compile unit where defined
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vals[3] = DBG_CAST(DtoDwarfCompileUnit(vd->getModule()));
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// line number where defined
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vals[4] = DtoConstUint(vd->loc.linnum);
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// type descriptor
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vals[5] = DBG_CAST(typeDescr);
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return emitDwarfGlobal(getDwarfVariableType(), vals, "llvm.dbg.variable");
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}
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//////////////////////////////////////////////////////////////////////////////////////////////////
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static void dwarfDeclare(LLValue* var, LLGlobalVariable* varDescr)
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{
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LLSmallVector<LLValue*,2> args;
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args.push_back(DtoBitCast(var, DBG_TYPE));
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args.push_back(DBG_CAST(varDescr));
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gIR->ir->CreateCall(gIR->module->getFunction("llvm.dbg.declare"), args.begin(), args.end());
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}
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//////////////////////////////////////////////////////////////////////////////////////////////////
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static LLGlobalVariable* dwarfTypeDescription(Loc loc, Type* type, LLGlobalVariable* cu, const char* c_name)
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{
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Type* t = type->toBasetype();
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if (t->ty == Tvoid)
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return NULL;
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else if (t->isintegral() || t->isfloating())
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return dwarfBasicType(type, cu);
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else if (t->ty == Tpointer)
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return dwarfDerivedType(loc, type, cu);
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else if (t->ty == Tarray)
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return dwarfCompositeType(loc, type, cu);
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if (global.params.warnings)
|
|
warning("%s: unsupported type for debug info: %s", loc.toChars(), type->toChars());
|
|
return NULL;
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void DtoDwarfLocalVariable(LLValue* ll, VarDeclaration* vd)
|
|
{
|
|
// get compile units
|
|
LLGlobalVariable* thisCU = DtoDwarfCompileUnit(gIR->dmodule);
|
|
LLGlobalVariable* varCU = thisCU;
|
|
if (vd->getModule() != gIR->dmodule)
|
|
varCU = DtoDwarfCompileUnit(vd->getModule());
|
|
|
|
// get type description
|
|
Type* t = vd->type->toBasetype();
|
|
LLGlobalVariable* TD = dwarfTypeDescription(vd->loc, vd->type, thisCU, NULL);
|
|
if (TD == NULL)
|
|
return; // unsupported
|
|
|
|
// get variable description
|
|
LLGlobalVariable* VD;
|
|
VD = dwarfVariable(vd, TD);
|
|
|
|
// declare
|
|
dwarfDeclare(ll, VD);
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
LLGlobalVariable* DtoDwarfCompileUnit(Module* m)
|
|
{
|
|
// we might be generating for an import
|
|
if (!m->ir.irModule)
|
|
m->ir.irModule = new IrModule(m);
|
|
else if (m->ir.irModule->dwarfCompileUnit)
|
|
{
|
|
if (m->ir.irModule->dwarfCompileUnit->getParent() == gIR->module)
|
|
return m->ir.irModule->dwarfCompileUnit;
|
|
}
|
|
|
|
LLGlobalVariable* gv = dwarfCompileUnit(m);
|
|
m->ir.irModule->dwarfCompileUnit = gv;
|
|
return gv;
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
LLGlobalVariable* DtoDwarfSubProgram(FuncDeclaration* fd)
|
|
{
|
|
// FIXME: duplicates ?
|
|
return dwarfSubProgram(fd, DtoDwarfCompileUnit(gIR->dmodule));
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
LLGlobalVariable* DtoDwarfGlobalVariable(LLGlobalVariable* ll, VarDeclaration* vd)
|
|
{
|
|
// FIXME: duplicates ?
|
|
return dwarfGlobalVariable(ll, vd);
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void DtoDwarfFuncStart(FuncDeclaration* fd)
|
|
{
|
|
assert(fd->ir.irFunc->dwarfSubProg);
|
|
gIR->ir->CreateCall(gIR->module->getFunction("llvm.dbg.func.start"), DBG_CAST(fd->ir.irFunc->dwarfSubProg));
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void DtoDwarfFuncEnd(FuncDeclaration* fd)
|
|
{
|
|
assert(fd->ir.irFunc->dwarfSubProg);
|
|
gIR->ir->CreateCall(gIR->module->getFunction("llvm.dbg.region.end"), DBG_CAST(fd->ir.irFunc->dwarfSubProg));
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void DtoDwarfStopPoint(unsigned ln)
|
|
{
|
|
LLSmallVector<LLValue*,3> args;
|
|
args.push_back(DtoConstUint(ln));
|
|
args.push_back(DtoConstUint(0));
|
|
FuncDeclaration* fd = gIR->func()->decl;
|
|
args.push_back(DBG_CAST(DtoDwarfCompileUnit(fd->getModule())));
|
|
gIR->ir->CreateCall(gIR->module->getFunction("llvm.dbg.stoppoint"), args.begin(), args.end());
|
|
}
|