func (d FileDescriptor) path() llvm.Value {
dirname, filename := path.Split(string(d))
if l := len(dirname); l > 0 && dirname[l-1] == '/' {
dirname = dirname[:l-1]
}
return llvm.MDNode([]llvm.Value{llvm.MDString(filename), llvm.MDString(dirname)})
}
func (d *GlobalVariableDescriptor) mdNode(info *DebugInfo) llvm.Value {
return llvm.MDNode([]llvm.Value{
llvm.ConstInt(llvm.Int32Type(), uint64(d.Tag())+llvm.LLVMDebugVersion, false),
llvm.ConstNull(llvm.Int32Type()),
info.MDNode(d.Context),
llvm.MDString(d.Name),
llvm.MDString(d.DisplayName),
llvm.MDNode(nil),
info.mdFileNode(d.File),
llvm.ConstInt(llvm.Int32Type(), uint64(d.Line), false),
info.MDNode(d.Type),
constInt1(d.Local),
constInt1(!d.External),
d.Value})
}
func (d *CompileUnitDescriptor) mdNode(info *DebugInfo) llvm.Value {
return llvm.MDNode([]llvm.Value{
llvm.ConstInt(llvm.Int32Type(), uint64(d.Tag())+llvm.LLVMDebugVersion, false),
d.Path.path(),
llvm.ConstInt(llvm.Int32Type(), uint64(d.Language), false),
llvm.MDString(d.Producer),
constInt1(d.Optimized),
llvm.MDString(d.CompilerFlags),
llvm.ConstInt(llvm.Int32Type(), uint64(d.Runtime), false),
d.mdNodeList(info, d.EnumTypes),
d.mdNodeList(info, d.RetainedTypes),
d.mdNodeList(info, d.Subprograms),
d.mdNodeList(info, d.GlobalVariables),
d.mdNodeList(info, nil), // List of imported entities
llvm.MDString(""), // Split debug filename
})
}
func (d *LocalVariableDescriptor) mdNode(info *DebugInfo) llvm.Value {
return llvm.MDNode([]llvm.Value{
llvm.ConstInt(llvm.Int32Type(), uint64(d.Tag())+llvm.LLVMDebugVersion, false),
info.MDNode(d.Context),
llvm.MDString(d.Name),
info.mdFileNode(d.File),
llvm.ConstInt(llvm.Int32Type(), uint64(d.Line)|(uint64(d.Argument)<<24), false),
info.MDNode(d.Type),
llvm.ConstNull(llvm.Int32Type()), // flags
llvm.ConstNull(llvm.Int32Type()), // optional reference to inline location
})
}
func (d *DerivedTypeDescriptor) mdNode(info *DebugInfo) llvm.Value {
return llvm.MDNode([]llvm.Value{
llvm.ConstInt(llvm.Int32Type(), llvm.LLVMDebugVersion+uint64(d.Tag()), false),
FileDescriptor(d.File).path(),
info.MDNode(d.Context),
llvm.MDString(d.Name),
llvm.ConstInt(llvm.Int32Type(), uint64(d.Line), false),
llvm.ConstInt(llvm.Int64Type(), d.Size, false),
llvm.ConstInt(llvm.Int64Type(), d.Alignment, false),
llvm.ConstInt(llvm.Int64Type(), d.Offset, false),
llvm.ConstInt(llvm.Int32Type(), uint64(d.Flags), false),
info.MDNode(d.Base)})
}
func (d *SubprogramDescriptor) mdNode(info *DebugInfo) llvm.Value {
return llvm.MDNode([]llvm.Value{
llvm.ConstInt(llvm.Int32Type(), llvm.LLVMDebugVersion+uint64(d.Tag()), false),
FileDescriptor(d.File).path(),
info.MDNode(d.Context),
llvm.MDString(d.Name),
llvm.MDString(d.DisplayName),
llvm.MDString(""), // mips linkage name
llvm.ConstInt(llvm.Int32Type(), uint64(d.Line), false),
info.MDNode(d.Type),
llvm.ConstNull(llvm.Int1Type()), // not static
llvm.ConstAllOnes(llvm.Int1Type()), // locally defined (not extern)
llvm.ConstNull(llvm.Int32Type()), // virtuality
llvm.ConstNull(llvm.Int32Type()), // index into a virtual function
info.MDNode(nil), // basetype containing the vtable pointer
llvm.ConstInt(llvm.Int32Type(), 0, false), // flags
llvm.ConstNull(llvm.Int1Type()), // not optimised
d.Function,
info.MDNode(nil), // Template parameters
info.MDNode(nil), // function declaration descriptor
llvm.MDNode(nil), // function variables
llvm.ConstInt(llvm.Int32Type(), uint64(d.ScopeLine), false), // Line number where the scope of the subprogram begins
})
}
func (d *CompositeTypeDescriptor) mdNode(info *DebugInfo) llvm.Value {
return llvm.MDNode([]llvm.Value{
llvm.ConstInt(llvm.Int32Type(), llvm.LLVMDebugVersion+uint64(d.Tag()), false),
FileDescriptor(d.File).path(),
info.MDNode(d.Context),
llvm.MDString(d.Name),
llvm.ConstInt(llvm.Int32Type(), uint64(d.Line), false),
llvm.ConstInt(llvm.Int64Type(), d.Size, false),
llvm.ConstInt(llvm.Int64Type(), d.Alignment, false),
llvm.ConstInt(llvm.Int64Type(), d.Offset, false),
llvm.ConstInt(llvm.Int32Type(), uint64(d.Flags), false),
info.MDNode(d.Base), // reference type derived from
llvm.MDNode(info.MDNodes(d.Members)),
llvm.ConstInt(llvm.Int32Type(), uint64(0), false), // Runtime language
llvm.ConstInt(llvm.Int32Type(), uint64(0), false), // Base type containing the vtable pointer for this type
})
}
func (info *DebugInfo) MDNode(d DebugDescriptor) llvm.Value {
if d == nil {
return llvm.Value{nil}
}
if info.cache == nil {
info.cache = make(map[DebugDescriptor]llvm.Value)
}
value, exists := info.cache[d]
if !exists {
// Create a dummy value to stop recursion,
// and then replace it with the real value.
//
// We need a unique string here, as metadata
// nodes are deduplicated: use the address of
// the DebugInfo + len(info.cache).
dummy := llvm.MDString(fmt.Sprintf("llgo/debug.DebugInfo:%p:%d", info, len(info.cache)))
info.cache[d] = dummy
value = d.mdNode(info)
info.cache[d] = value
dummy.ReplaceAllUsesWith(value)
}
return value
}