mirror of
https://github.com/ldc-developers/ldc.git
synced 2025-05-02 08:01:11 +03:00
557 lines
16 KiB
C++
557 lines
16 KiB
C++
#include "gen/llvm.h"
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#include "llvm/CodeGen/MachineModuleInfo.h"
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#include "llvm/Support/Dwarf.h"
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/PathV2.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 "gen/llvmhelpers.h"
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#include "gen/linkage.h"
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#include "gen/utils.h"
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#include "ir/irmodule.h"
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using namespace llvm::dwarf;
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#ifndef DISABLE_DEBUG_INFO
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//////////////////////////////////////////////////////////////////////////////////////////////////
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// get the module the symbol is in, or - for template instances - the current module
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static Module* getDefinedModule(Dsymbol* s)
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{
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// templates are defined in current module
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if (DtoIsTemplateInstance(s))
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{
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return gIR->dmodule;
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}
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// array operations as well
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else if (FuncDeclaration* fd = s->isFuncDeclaration())
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{
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if (fd->isArrayOp)
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return gIR->dmodule;
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}
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// otherwise use the symbol's module
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return s->getModule();
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}
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//////////////////////////////////////////////////////////////////////////////////////////////////
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static llvm::DIType dwarfTypeDescription_impl(Type* type, const char* c_name);
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static llvm::DIType dwarfTypeDescription(Type* type, const char* c_name);
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//////////////////////////////////////////////////////////////////////////////////////////////////
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llvm::DIFile DtoDwarfFile(Loc loc)
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{
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llvm::SmallString<128> path(loc.filename);
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llvm::sys::fs::make_absolute(path);
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return gIR->dibuilder.createFile(
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llvm::sys::path::filename(path),
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llvm::sys::path::parent_path(path)
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);
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}
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//////////////////////////////////////////////////////////////////////////////////////////////////
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static llvm::DIType dwarfBasicType(Type* type)
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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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// find encoding
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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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return gIR->dibuilder.createBasicType(
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type->toChars(), // name
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getTypeBitSize(T), // size (bits)
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getABITypeAlign(T)*8, // align (bits)
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id
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);
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}
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//////////////////////////////////////////////////////////////////////////////////////////////////
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static llvm::DIType dwarfPointerType(Type* type)
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{
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const LLType* T = DtoType(type);
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Type* t = type->toBasetype();
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assert(t->ty == Tpointer && "only pointers allowed for debug info in dwarfPointerType");
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// find base type
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llvm::DIType basetype;
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Type* nt = t->nextOf();
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basetype = dwarfTypeDescription_impl(nt, NULL);
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if (nt->ty == Tvoid)
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basetype = llvm::DIType(NULL);
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return gIR->dibuilder.createPointerType(
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basetype,
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getTypeBitSize(T), // size (bits)
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getABITypeAlign(T)*8, // align (bits)
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type->toChars() // name
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);
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}
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//////////////////////////////////////////////////////////////////////////////////////////////////
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static llvm::DIType dwarfMemberType(unsigned linnum, Type* type, llvm::DIFile file, 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 = type->toBasetype();
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// find base type
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llvm::DIType basetype;
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basetype = dwarfTypeDescription(t, NULL);
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if (t->ty == Tvoid)
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basetype = llvm::DIType(NULL);
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return gIR->dibuilder.createMemberType(
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c_name, // name
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file, // file
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linnum, // line number
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getTypeBitSize(T), // size (bits)
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getABITypeAlign(T)*8, // align (bits)
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offset*8, // offset (bits)
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//FIXME: need flags?
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0, // flags
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basetype // derived from
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);
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}
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//////////////////////////////////////////////////////////////////////////////////////////////////
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static void add_base_fields(
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ClassDeclaration* sd,
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llvm::DIFile file,
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std::vector<llvm::Value*>& elems)
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{
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if (sd->baseClass)
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{
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add_base_fields(sd->baseClass, file, elems);
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}
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ArrayIter<VarDeclaration> it(sd->fields);
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size_t narr = sd->fields.dim;
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elems.reserve(narr);
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for (; !it.done(); it.next())
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{
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VarDeclaration* vd = it.get();
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elems.push_back(dwarfMemberType(vd->loc.linnum, vd->type, file, vd->toChars(), vd->offset));
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}
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}
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static llvm::DIType dwarfCompositeType(Type* type)
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{
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const LLType* T = DtoType(type);
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Type* t = type->toBasetype();
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// defaults
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llvm::StringRef name;
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unsigned linnum = 0;
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llvm::DIFile file;
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// elements
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std::vector<llvm::Value*> elems;
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// pointer to ir->diCompositeType
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llvm::DIType *diCompositeType = 0;
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llvm::DIType derivedFrom;
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assert((t->ty == Tstruct || t->ty == Tclass) &&
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"unsupported type for dwarfCompositeType");
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AggregateDeclaration* sd;
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if (t->ty == Tstruct)
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{
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TypeStruct* ts = (TypeStruct*)t;
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sd = ts->sym;
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}
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else
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{
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TypeClass* tc = (TypeClass*)t;
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sd = tc->sym;
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}
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assert(sd);
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// make sure it's resolved
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sd->codegen(Type::sir);
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// if we don't know the aggregate's size, we don't know enough about it
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// to provide debug info. probably a forward-declared struct?
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if (sd->sizeok == 0)
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return llvm::DICompositeType(NULL);
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IrStruct* ir = sd->ir.irStruct;
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assert(ir);
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if ((llvm::MDNode*)ir->diCompositeType != 0)
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return ir->diCompositeType;
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diCompositeType = &ir->diCompositeType;
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name = sd->toChars();
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linnum = sd->loc.linnum;
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file = DtoDwarfFile(sd->loc);
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// set diCompositeType to handle recursive types properly
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if (t->ty == Tclass) {
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ir->diCompositeType = gIR->dibuilder.createClassType(
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llvm::DIDescriptor(file),
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name, // name
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file, // compile unit where defined
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linnum, // line number where defined
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getTypeBitSize(T), // size in bits
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getABITypeAlign(T)*8, // alignment in bits
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0, // offset in bits,
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llvm::DIType::FlagFwdDecl, // flags
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derivedFrom, // DerivedFrom
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llvm::DIArray(0)
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);
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} else {
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ir->diCompositeType = gIR->dibuilder.createStructType(
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llvm::DIDescriptor(file),
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name, // name
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file, // compile unit where defined
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linnum, // line number where defined
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getTypeBitSize(T), // size in bits
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getABITypeAlign(T)*8, // alignment in bits
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llvm::DIType::FlagFwdDecl, // flags
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llvm::DIArray(0)
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);
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}
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if (!ir->aggrdecl->isInterfaceDeclaration()) // plain interfaces don't have one
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{
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if (t->ty == Tstruct)
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{
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ArrayIter<VarDeclaration> it(sd->fields);
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size_t narr = sd->fields.dim;
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elems.reserve(narr);
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for (; !it.done(); it.next())
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{
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VarDeclaration* vd = it.get();
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llvm::DIType dt = dwarfMemberType(vd->loc.linnum, vd->type, file, vd->toChars(), vd->offset);
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elems.push_back(dt);
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}
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}
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else
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{
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ClassDeclaration *classDecl = ir->aggrdecl->isClassDeclaration();
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add_base_fields(classDecl, file, elems);
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if (classDecl->baseClass)
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derivedFrom = dwarfCompositeType(classDecl->baseClass->getType());
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}
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}
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llvm::DIArray elemsArray =
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gIR->dibuilder.getOrCreateArray(elems.data(), elems.size());
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llvm::DIType ret;
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if (t->ty == Tclass) {
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ret = gIR->dibuilder.createClassType(
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llvm::DIDescriptor(file),
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name, // name
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file, // compile unit where defined
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linnum, // line number where defined
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getTypeBitSize(T), // size in bits
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getABITypeAlign(T)*8, // alignment in bits
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0, // offset in bits,
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llvm::DIType::FlagFwdDecl, // flags
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derivedFrom, // DerivedFrom
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elemsArray
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);
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} else {
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ret = gIR->dibuilder.createStructType(
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llvm::DIDescriptor(file),
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name, // name
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file, // compile unit where defined
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linnum, // line number where defined
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getTypeBitSize(T), // size in bits
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getABITypeAlign(T)*8, // alignment in bits
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llvm::DIType::FlagFwdDecl, // flags
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elemsArray
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);
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}
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if (diCompositeType)
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*diCompositeType = ret;
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return ret;
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}
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//////////////////////////////////////////////////////////////////////////////////////////////////
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static llvm::DIGlobalVariable dwarfGlobalVariable(LLGlobalVariable* ll, VarDeclaration* vd)
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{
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#if DMDV2
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assert(vd->isDataseg() || (vd->storage_class & (STCconst | STCimmutable) && vd->init));
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#else
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assert(vd->isDataseg());
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#endif
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return gIR->dibuilder.createGlobalVariable(
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vd->toChars(), // name TODO: mangle() or toPrettyChars() instead?
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DtoDwarfFile(vd->loc), // file
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vd->loc.linnum, // line num
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dwarfTypeDescription_impl(vd->type, NULL), // type
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vd->protection == PROTprivate, // is local to unit
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ll // value
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);
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}
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//////////////////////////////////////////////////////////////////////////////////////////////////
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static void dwarfDeclare(LLValue* var, llvm::DIVariable divar)
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{
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llvm::Instruction *instr = gIR->dibuilder.insertDeclare(var, divar, gIR->scopebb());
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instr->setDebugLoc(gIR->ir->getCurrentDebugLocation());
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}
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//////////////////////////////////////////////////////////////////////////////////////////////////
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llvm::DIType dwarfArrayType(Type* type) {
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const LLType* T = DtoType(type);
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Type* t = type->toBasetype();
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llvm::DIFile file = DtoDwarfFile(Loc(gIR->dmodule, 0));
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std::vector<llvm::Value*> elems;
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elems.push_back(dwarfMemberType(0, Type::tsize_t, file, "length", 0));
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elems.push_back(dwarfMemberType(0, t->nextOf()->pointerTo(), file, "ptr", global.params.is64bit?8:4));
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return gIR->dibuilder.createStructType
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(
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llvm::DIDescriptor(file),
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llvm::StringRef(), // Name TODO: Really no name for arrays?
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file, // File
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0, // LineNo
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getTypeBitSize(T), // size in bits
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getABITypeAlign(T)*8, // alignment in bits
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0, // What here?
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gIR->dibuilder.getOrCreateArray(elems.data(), elems.size())
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);
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}
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//////////////////////////////////////////////////////////////////////////////////////////////////
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static llvm::DIType dwarfTypeDescription_impl(Type* type, 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 llvm::DIType(NULL);
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else if (t->isintegral() || t->isfloating())
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return dwarfBasicType(type);
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else if (t->ty == Tpointer)
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return dwarfPointerType(type);
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else if (t->ty == Tarray)
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return dwarfArrayType(type);
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else if (t->ty == Tstruct || t->ty == Tclass)
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return dwarfCompositeType(type);
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return llvm::DIType(NULL);
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}
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static llvm::DIType dwarfTypeDescription(Type* type, const char* c_name)
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{
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Type* t = type->toBasetype();
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if (t->ty == Tclass)
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return dwarfTypeDescription_impl(type->pointerTo(), c_name);
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else
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return dwarfTypeDescription_impl(type, c_name);
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}
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//////////////////////////////////////////////////////////////////////////////////////////////////
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void DtoDwarfLocalVariable(LLValue* ll, VarDeclaration* vd)
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{
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Logger::println("D to dwarf local variable");
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LOG_SCOPE;
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// get type description
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llvm::DIType TD = dwarfTypeDescription(vd->type, NULL);
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if ((llvm::MDNode*)TD == 0)
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return; // unsupported
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// get variable description
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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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vd->debugVariable = gIR->dibuilder.createLocalVariable(
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tag, // tag
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gIR->func()->diSubprogram, // context
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vd->toChars(), // name
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DtoDwarfFile(vd->loc), // file
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vd->loc.linnum, // line num
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TD, // type
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true // preserve
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);
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// declare
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dwarfDeclare(ll, vd->debugVariable);
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}
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//////////////////////////////////////////////////////////////////////////////////////////////////
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void DtoDwarfCompileUnit(Module* m)
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{
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Logger::println("D to dwarf compile_unit");
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LOG_SCOPE;
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// prepare srcpath
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std::string srcpath(FileName::path(m->srcfile->name->toChars()));
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if (!FileName::absolute(srcpath.c_str())) {
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llvm::sys::Path tmp = llvm::sys::Path::GetCurrentDirectory();
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tmp.appendComponent(srcpath);
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srcpath = tmp.str();
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if (!srcpath.empty() && *srcpath.rbegin() != '/' && *srcpath.rbegin() != '\\')
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srcpath = srcpath + '/';
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}
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gIR->dibuilder.createCompileUnit(
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global.params.symdebug == 2 ? DW_LANG_C : DW_LANG_D,
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m->srcfile->name->toChars(),
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srcpath,
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"LDC (http://www.dsource.org/projects/ldc)",
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false, // isOptimized TODO
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llvm::StringRef(), // Flags TODO
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1 // Runtime Version TODO
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);
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}
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//////////////////////////////////////////////////////////////////////////////////////////////////
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llvm::DISubprogram DtoDwarfSubProgram(FuncDeclaration* fd)
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{
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Logger::println("D to dwarf subprogram");
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LOG_SCOPE;
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llvm::DIFile file = DtoDwarfFile(fd->loc);
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Type *retType = ((TypeFunction*)fd->type)->next;
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// FIXME: duplicates ?
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return gIR->dibuilder.createFunction(
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llvm::DICompileUnit(file), // context
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fd->toPrettyChars(), // name
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fd->mangle(), // linkage name
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file, // file
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fd->loc.linnum, // line no
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dwarfTypeDescription(retType, NULL), // type
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fd->protection == PROTprivate, // is local to unit
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gIR->dmodule == getDefinedModule(fd), // isdefinition
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0, // Flags
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false, // isOptimized
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fd->ir.irFunc->func
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);
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}
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//////////////////////////////////////////////////////////////////////////////////////////////////
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llvm::DISubprogram DtoDwarfSubProgramInternal(const char* prettyname, const char* mangledname)
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{
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Logger::println("D to dwarf subprogram");
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LOG_SCOPE;
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llvm::DIFile file(DtoDwarfFile(Loc(gIR->dmodule, 0)));
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// FIXME: duplicates ?
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return gIR->dibuilder.createFunction(
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llvm::DIDescriptor(file), // context
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prettyname, // name
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mangledname, // linkage name
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file, // file
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0, // line no
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llvm::DIType(NULL), // return type. TODO: fill it up
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true, // is local to unit
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true // isdefinition
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);
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}
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//////////////////////////////////////////////////////////////////////////////////////////////////
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llvm::DIGlobalVariable DtoDwarfGlobalVariable(LLGlobalVariable* ll, VarDeclaration* vd)
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{
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Logger::println("D to dwarf global_variable");
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LOG_SCOPE;
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// FIXME: duplicates ?
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return dwarfGlobalVariable(ll, vd);
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}
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//////////////////////////////////////////////////////////////////////////////////////////////////
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void DtoDwarfFuncStart(FuncDeclaration* fd)
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{
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Logger::println("D to dwarf funcstart");
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LOG_SCOPE;
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assert((llvm::MDNode*)fd->ir.irFunc->diSubprogram != 0);
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DtoDwarfStopPoint(fd->loc.linnum);
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/* fd->ir.irFunc->diLexicalBlock = gIR->difactory.CreateLexicalBlock(
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fd->ir.irFunc->diSubprogram, // context
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DtoDwarfFile(fd->loc, DtoDwarfCompileUnit(getDefinedModule(fd))), // file
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fd->loc.linnum
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);*/
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}
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//////////////////////////////////////////////////////////////////////////////////////////////////
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void DtoDwarfFuncEnd(FuncDeclaration* fd)
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{
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Logger::println("D to dwarf funcend");
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LOG_SCOPE;
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assert((llvm::MDNode*)fd->ir.irFunc->diSubprogram != 0);
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}
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//////////////////////////////////////////////////////////////////////////////////////////////////
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void DtoDwarfStopPoint(unsigned ln)
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{
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Logger::println("D to dwarf stoppoint at line %u", ln);
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LOG_SCOPE;
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llvm::DebugLoc loc = llvm::DebugLoc::get(ln, 0, gIR->func()->diSubprogram);
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gIR->ir->SetCurrentDebugLocation(loc);
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}
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//////////////////////////////////////////////////////////////////////////////////////////////////
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void DtoDwarfValue(LLValue* var, VarDeclaration* vd)
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{
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if (llvm::isa<llvm::AllocaInst>(vd->ir.irLocal->value) == 0)
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return;
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llvm::Instruction *instr = gIR->dibuilder.insertDbgValueIntrinsic(vd->ir.irLocal->value, 0, vd->debugVariable, gIR->scopebb());
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instr->setDebugLoc(gIR->ir->getCurrentDebugLocation());
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}
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#endif
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