1 //===-- llvm/CodeGen/DwarfWriter.h - Dwarf Framework ------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by James M. Laskey and is distributed under the
6 // University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains support for writing Dwarf debug info into asm files. For
11 // Details on the Dwarf 3 specfication see DWARF Debugging Information Format
12 // V.3 reference manual http://dwarf.freestandards.org ,
14 // The role of the Dwarf Writer class is to extract debug information from the
15 // MachineDebugInfo object, organize it in Dwarf form and then emit it into asm
16 // the current asm file using data and high level Dwarf directives.
18 //===----------------------------------------------------------------------===//
20 #ifndef LLVM_CODEGEN_DWARFWRITER_H
21 #define LLVM_CODEGEN_DWARFWRITER_H
23 #include "llvm/ADT/UniqueVector.h"
31 //===--------------------------------------------------------------------===//
32 // Dwarf constants as gleaned from the DWARF Debugging Information Format V.3
33 // reference manual http://dwarf.freestandards.org .
35 enum dwarf_constants {
39 DW_TAG_array_type = 0x01,
40 DW_TAG_class_type = 0x02,
41 DW_TAG_entry_point = 0x03,
42 DW_TAG_enumeration_type = 0x04,
43 DW_TAG_formal_parameter = 0x05,
44 DW_TAG_imported_declaration = 0x08,
46 DW_TAG_lexical_block = 0x0b,
48 DW_TAG_pointer_type = 0x0f,
49 DW_TAG_reference_type = 0x10,
50 DW_TAG_compile_unit = 0x11,
51 DW_TAG_string_type = 0x12,
52 DW_TAG_structure_type = 0x13,
53 DW_TAG_subroutine_type = 0x15,
54 DW_TAG_typedef = 0x16,
55 DW_TAG_union_type = 0x17,
56 DW_TAG_unspecified_parameters = 0x18,
57 DW_TAG_variant = 0x19,
58 DW_TAG_common_block = 0x1a,
59 DW_TAG_common_inclusion = 0x1b,
60 DW_TAG_inheritance = 0x1c,
61 DW_TAG_inlined_subroutine = 0x1d,
63 DW_TAG_ptr_to_member_type = 0x1f,
64 DW_TAG_set_type = 0x20,
65 DW_TAG_subrange_type = 0x21,
66 DW_TAG_with_stmt = 0x22,
67 DW_TAG_access_declaration = 0x23,
68 DW_TAG_base_type = 0x24,
69 DW_TAG_catch_block = 0x25,
70 DW_TAG_const_type = 0x26,
71 DW_TAG_constant = 0x27,
72 DW_TAG_enumerator = 0x28,
73 DW_TAG_file_type = 0x29,
75 DW_TAG_namelist = 0x2b,
76 DW_TAG_namelist_item = 0x2c,
77 DW_TAG_packed_type = 0x2d,
78 DW_TAG_subprogram = 0x2e,
79 DW_TAG_template_type_parameter = 0x2f,
80 DW_TAG_template_value_parameter = 0x30,
81 DW_TAG_thrown_type = 0x31,
82 DW_TAG_try_block = 0x32,
83 DW_TAG_variant_part = 0x33,
84 DW_TAG_variable = 0x34,
85 DW_TAG_volatile_type = 0x35,
86 DW_TAG_dwarf_procedure = 0x36,
87 DW_TAG_restrict_type = 0x37,
88 DW_TAG_interface_type = 0x38,
89 DW_TAG_namespace = 0x39,
90 DW_TAG_imported_module = 0x3a,
91 DW_TAG_unspecified_type = 0x3b,
92 DW_TAG_partial_unit = 0x3c,
93 DW_TAG_imported_unit = 0x3d,
94 DW_TAG_condition = 0x3f,
95 DW_TAG_shared_type = 0x40,
96 DW_TAG_lo_user = 0x4080,
97 DW_TAG_hi_user = 0xffff,
100 DW_CHILDREN_no = 0x00,
101 DW_CHILDREN_yes = 0x01,
104 DW_AT_sibling = 0x01,
105 DW_AT_location = 0x02,
107 DW_AT_ordering = 0x09,
108 DW_AT_byte_size = 0x0b,
109 DW_AT_bit_offset = 0x0c,
110 DW_AT_bit_size = 0x0d,
111 DW_AT_stmt_list = 0x10,
113 DW_AT_high_pc = 0x12,
114 DW_AT_language = 0x13,
116 DW_AT_discr_value = 0x16,
117 DW_AT_visibility = 0x17,
119 DW_AT_string_length = 0x19,
120 DW_AT_common_reference = 0x1a,
121 DW_AT_comp_dir = 0x1b,
122 DW_AT_const_value = 0x1c,
123 DW_AT_containing_type = 0x1d,
124 DW_AT_default_value = 0x1e,
126 DW_AT_is_optional = 0x21,
127 DW_AT_lower_bound = 0x22,
128 DW_AT_producer = 0x25,
129 DW_AT_prototyped = 0x27,
130 DW_AT_return_addr = 0x2a,
131 DW_AT_start_scope = 0x2c,
132 DW_AT_bit_stride = 0x2e,
133 DW_AT_upper_bound = 0x2f,
134 DW_AT_abstract_origin = 0x31,
135 DW_AT_accessibility = 0x32,
136 DW_AT_address_class = 0x33,
137 DW_AT_artificial = 0x34,
138 DW_AT_base_types = 0x35,
139 DW_AT_calling_convention = 0x36,
141 DW_AT_data_member_location = 0x38,
142 DW_AT_decl_column = 0x39,
143 DW_AT_decl_file = 0x3a,
144 DW_AT_decl_line = 0x3b,
145 DW_AT_declaration = 0x3c,
146 DW_AT_discr_list = 0x3d,
147 DW_AT_encoding = 0x3e,
148 DW_AT_external = 0x3f,
149 DW_AT_frame_base = 0x40,
151 DW_AT_identifier_case = 0x42,
152 DW_AT_macro_info = 0x43,
153 DW_AT_namelist_item = 0x44,
154 DW_AT_priority = 0x45,
155 DW_AT_segment = 0x46,
156 DW_AT_specification = 0x47,
157 DW_AT_static_link = 0x48,
159 DW_AT_use_location = 0x4a,
160 DW_AT_variable_parameter = 0x4b,
161 DW_AT_virtuality = 0x4c,
162 DW_AT_vtable_elem_location = 0x4d,
163 DW_AT_allocated = 0x4e,
164 DW_AT_associated = 0x4f,
165 DW_AT_data_location = 0x50,
166 DW_AT_byte_stride = 0x51,
167 DW_AT_entry_pc = 0x52,
168 DW_AT_use_UTF8 = 0x53,
169 DW_AT_extension = 0x54,
171 DW_AT_trampoline = 0x56,
172 DW_AT_call_column = 0x57,
173 DW_AT_call_file = 0x58,
174 DW_AT_call_line = 0x59,
175 DW_AT_description = 0x5a,
176 DW_AT_binary_scale = 0x5b,
177 DW_AT_decimal_scale = 0x5c,
179 DW_AT_decimal_sign = 0x5e,
180 DW_AT_digit_count = 0x5f,
181 DW_AT_picture_string = 0x60,
182 DW_AT_mutable = 0x61,
183 DW_AT_threads_scaled = 0x62,
184 DW_AT_explicit = 0x63,
185 DW_AT_object_pointer = 0x64,
186 DW_AT_endianity = 0x65,
187 DW_AT_elemental = 0x66,
189 DW_AT_recursive = 0x68,
190 DW_AT_lo_user = 0x2000,
191 DW_AT_hi_user = 0x3fff,
193 // Attribute form encodings
195 DW_FORM_block2 = 0x03,
196 DW_FORM_block4 = 0x04,
197 DW_FORM_data2 = 0x05,
198 DW_FORM_data4 = 0x06,
199 DW_FORM_data8 = 0x07,
200 DW_FORM_string = 0x08,
201 DW_FORM_block = 0x09,
202 DW_FORM_block1 = 0x0a,
203 DW_FORM_data1 = 0x0b,
205 DW_FORM_sdata = 0x0d,
207 DW_FORM_udata = 0x0f,
208 DW_FORM_ref_addr = 0x10,
213 DW_FORM_ref_udata = 0x15,
214 DW_FORM_indirect = 0x16,
216 // Operation encodings
219 DW_OP_const1u = 0x08,
220 DW_OP_const1s = 0x09,
221 DW_OP_const2u = 0x0a,
222 DW_OP_const2s = 0x0b,
223 DW_OP_const4u = 0x0c,
224 DW_OP_const4s = 0x0d,
225 DW_OP_const8u = 0x0e,
226 DW_OP_const8s = 0x0f,
246 DW_OP_plus_uconst = 0x23,
272 DW_OP_deref_size = 0x94,
273 DW_OP_xderef_size = 0x95,
275 DW_OP_push_object_address = 0x97,
278 DW_OP_call_ref = 0x9a,
279 DW_OP_form_tls_address = 0x9b,
280 DW_OP_call_frame_cfa = 0x9c,
281 DW_OP_lo_user = 0xe0,
282 DW_OP_hi_user = 0xff,
284 // Encoding attribute values
285 DW_ATE_address = 0x01,
286 DW_ATE_boolean = 0x02,
287 DW_ATE_complex_float = 0x03,
289 DW_ATE_signed = 0x05,
290 DW_ATE_signed_char = 0x06,
291 DW_ATE_unsigned = 0x07,
292 DW_ATE_unsigned_char = 0x08,
293 DW_ATE_imaginary_float = 0x09,
294 DW_ATE_packed_decimal = 0x0a,
295 DW_ATE_numeric_string = 0x0b,
296 DW_ATE_edited = 0x0c,
297 DW_ATE_signed_fixed = 0x0d,
298 DW_ATE_unsigned_fixed = 0x0e,
299 DW_ATE_decimal_float = 0x0f,
300 DW_ATE_lo_user = 0x80,
301 DW_ATE_hi_user = 0xff,
303 // Decimal sign attribute values
304 DW_DS_unsigned = 0x01,
305 DW_DS_leading_overpunch = 0x02,
306 DW_DS_trailing_overpunch = 0x03,
307 DW_DS_leading_separate = 0x04,
308 DW_DS_trailing_separate = 0x05,
310 // Endianity attribute values
311 DW_END_default = 0x00,
313 DW_END_little = 0x02,
314 DW_END_lo_user = 0x40,
315 DW_END_hi_user = 0xff,
317 // Accessibility codes
318 DW_ACCESS_public = 0x01,
319 DW_ACCESS_protected = 0x02,
320 DW_ACCESS_private = 0x03,
324 DW_VIS_exported = 0x02,
325 DW_VIS_qualified = 0x03,
328 DW_VIRTUALITY_none = 0x00,
329 DW_VIRTUALITY_virtual = 0x01,
330 DW_VIRTUALITY_pure_virtual = 0x02,
333 DW_LANG_C89 = 0x0001,
335 DW_LANG_Ada83 = 0x0003,
336 DW_LANG_C_plus_plus = 0x0004,
337 DW_LANG_Cobol74 = 0x0005,
338 DW_LANG_Cobol85 = 0x0006,
339 DW_LANG_Fortran77 = 0x0007,
340 DW_LANG_Fortran90 = 0x0008,
341 DW_LANG_Pascal83 = 0x0009,
342 DW_LANG_Modula2 = 0x000a,
343 DW_LANG_Java = 0x000b,
344 DW_LANG_C99 = 0x000c,
345 DW_LANG_Ada95 = 0x000d,
346 DW_LANG_Fortran95 = 0x000e,
347 DW_LANG_PLI = 0x000f,
348 DW_LANG_ObjC = 0x0010,
349 DW_LANG_ObjC_plus_plus = 0x0011,
350 DW_LANG_UPC = 0x0012,
352 DW_LANG_lo_user = 0x8000,
353 DW_LANG_hi_user = 0xffff,
355 // Identifier case codes
356 DW_ID_case_sensitive = 0x00,
357 DW_ID_up_case = 0x01,
358 DW_ID_down_case = 0x02,
359 DW_ID_case_insensitive = 0x03,
361 // Calling convention codes
363 DW_CC_program = 0x02,
365 DW_CC_lo_user = 0x40,
366 DW_CC_hi_user = 0xff,
369 DW_INL_not_inlined = 0x00,
370 DW_INL_inlined = 0x01,
371 DW_INL_declared_not_inlined = 0x02,
372 DW_INL_declared_inlined = 0x03,
375 DW_ORD_row_major = 0x00,
376 DW_ORD_col_major = 0x01,
378 // Discriminant descriptor values
382 // Line Number Standard Opcode Encodings
384 DW_LNS_advance_pc = 0x02,
385 DW_LNS_advance_line = 0x03,
386 DW_LNS_set_file = 0x04,
387 DW_LNS_set_column = 0x05,
388 DW_LNS_negate_stmt = 0x06,
389 DW_LNS_set_basic_block = 0x07,
390 DW_LNS_const_add_pc = 0x08,
391 DW_LNS_fixed_advance_pc = 0x09,
392 DW_LNS_set_prologue_end = 0x0a,
393 DW_LNS_set_epilogue_begin = 0x0b,
394 DW_LNS_set_isa = 0x0c,
396 // Line Number Extended Opcode Encodings
397 DW_LNE_end_sequence = 0x01,
398 DW_LNE_set_address = 0x02,
399 DW_LNE_define_file = 0x03,
400 DW_LNE_lo_user = 0x80,
401 DW_LNE_hi_user = 0xff,
403 // Macinfo Type Encodings
404 DW_MACINFO_define = 0x01,
405 DW_MACINFO_undef = 0x02,
406 DW_MACINFO_start_file = 0x03,
407 DW_MACINFO_end_file = 0x04,
408 DW_MACINFO_vendor_ext = 0xff,
410 // Call frame instruction encodings
411 DW_CFA_advance_loc = 0x40,
412 DW_CFA_offset = 0x80,
413 DW_CFA_restore = 0xc0,
414 DW_CFA_set_loc = 0x01,
415 DW_CFA_advance_loc1 = 0x02,
416 DW_CFA_advance_loc2 = 0x03,
417 DW_CFA_advance_loc4 = 0x04,
418 DW_CFA_offset_extended = 0x05,
419 DW_CFA_restore_extended = 0x06,
420 DW_CFA_undefined = 0x07,
421 DW_CFA_same_value = 0x08,
422 DW_CFA_register = 0x09,
423 DW_CFA_remember_state = 0x0a,
424 DW_CFA_restore_state = 0x0b,
425 DW_CFA_def_cfa = 0x0c,
426 DW_CFA_def_cfa_register = 0x0d,
427 DW_CFA_def_cfa_offset = 0x0e,
428 DW_CFA_def_cfa_expression = 0x0f,
429 DW_CFA_expression = 0x10,
430 DW_CFA_offset_extended_sf = 0x11,
431 DW_CFA_def_cfa_sf = 0x12,
432 DW_CFA_def_cfa_offset_sf = 0x13,
433 DW_CFA_val_offset = 0x14,
434 DW_CFA_val_offset_sf = 0x15,
435 DW_CFA_val_expression = 0x16,
436 DW_CFA_lo_user = 0x1c,
437 DW_CFA_hi_user = 0x3f
440 //===--------------------------------------------------------------------===//
441 // Forward declarations.
447 class MachineDebugInfo;
449 //===--------------------------------------------------------------------===//
450 // DWLabel - Labels are used to track locations in the assembler file.
451 // Labels appear in the form <prefix>debug_<Tag><Number>, where the tag is a
452 // category of label (Ex. location) and number is a value unique in that
455 const char *Tag; // Label category tag. Should always be
456 // a staticly declared C string.
457 unsigned Number; // Unique number.
459 DWLabel(const char *T, unsigned N) : Tag(T), Number(N) {}
462 //===--------------------------------------------------------------------===//
463 // DIEAbbrevData - Dwarf abbreviation data, describes the one attribute of a
464 // Dwarf abbreviation.
465 class DIEAbbrevData {
467 unsigned Attribute; // Dwarf attribute code.
468 unsigned Form; // Dwarf form code.
471 DIEAbbrevData(unsigned A, unsigned F)
477 unsigned getAttribute() const { return Attribute; }
478 unsigned getForm() const { return Form; }
481 //===--------------------------------------------------------------------===//
482 // DIEAbbrev - Dwarf abbreviation, describes the organization of a debug
483 // information object.
486 unsigned Tag; // Dwarf tag code.
487 unsigned ChildrenFlag; // Dwarf children flag.
488 std::vector<DIEAbbrevData> Data; // Raw data bytes for abbreviation.
492 DIEAbbrev(unsigned T, unsigned C)
500 unsigned getTag() const { return Tag; }
501 unsigned getChildrenFlag() const { return ChildrenFlag; }
502 const std::vector<DIEAbbrevData> &getData() const { return Data; }
504 /// operator== - Used by UniqueVector to locate entry.
506 bool operator==(const DIEAbbrev &DA) const;
508 /// operator< - Used by UniqueVector to locate entry.
510 bool operator<(const DIEAbbrev &DA) const;
512 /// AddAttribute - Adds another set of attribute information to the
514 void AddAttribute(unsigned Attribute, unsigned Form) {
515 Data.push_back(DIEAbbrevData(Attribute, Form));
518 /// Emit - Print the abbreviation using the specified Dwarf writer.
520 void Emit(const DwarfWriter &DW) const;
523 void print(std::ostream &O);
528 //===--------------------------------------------------------------------===//
529 // DIEValue - A debug information entry value.
542 unsigned Type; // Type of the value
544 DIEValue(unsigned T) : Type(T) {}
545 virtual ~DIEValue() {}
547 // Implement isa/cast/dyncast.
548 static bool classof(const DIEValue *) { return true; }
550 /// EmitValue - Emit value via the Dwarf writer.
552 virtual void EmitValue(const DwarfWriter &DW, unsigned Form) const = 0;
554 /// SizeOf - Return the size of a value in bytes.
556 virtual unsigned SizeOf(const DwarfWriter &DW, unsigned Form) const = 0;
559 //===--------------------------------------------------------------------===//
560 // DWInteger - An integer value DIE.
562 class DIEInteger : public DIEValue {
567 DIEInteger(int I) : DIEValue(isInteger), Integer(I) {}
569 // Implement isa/cast/dyncast.
570 static bool classof(const DIEInteger *) { return true; }
571 static bool classof(const DIEValue *I) { return I->Type == isInteger; }
573 /// EmitValue - Emit integer of appropriate size.
575 virtual void EmitValue(const DwarfWriter &DW, unsigned Form) const;
577 /// SizeOf - Determine size of integer value in bytes.
579 virtual unsigned SizeOf(const DwarfWriter &DW, unsigned Form) const;
582 //===--------------------------------------------------------------------===//
583 // DIEString - A string value DIE.
585 struct DIEString : public DIEValue {
586 const std::string String;
588 DIEString(const std::string &S) : DIEValue(isString), String(S) {}
590 // Implement isa/cast/dyncast.
591 static bool classof(const DIEString *) { return true; }
592 static bool classof(const DIEValue *S) { return S->Type == isString; }
594 /// EmitValue - Emit string value.
596 virtual void EmitValue(const DwarfWriter &DW, unsigned Form) const;
598 /// SizeOf - Determine size of string value in bytes.
600 virtual unsigned SizeOf(const DwarfWriter &DW, unsigned Form) const;
603 //===--------------------------------------------------------------------===//
604 // DIELabel - A simple label expression DIE.
606 struct DIELabel : public DIEValue {
609 DIELabel(const DWLabel &L) : DIEValue(isLabel), Label(L) {}
611 // Implement isa/cast/dyncast.
612 static bool classof(const DIELabel *) { return true; }
613 static bool classof(const DIEValue *L) { return L->Type == isLabel; }
615 /// EmitValue - Emit label value.
617 virtual void EmitValue(const DwarfWriter &DW, unsigned Form) const;
619 /// SizeOf - Determine size of label value in bytes.
621 virtual unsigned SizeOf(const DwarfWriter &DW, unsigned Form) const;
625 //===--------------------------------------------------------------------===//
626 // DIEAsIsLabel - An exact name of a label.
628 struct DIEAsIsLabel : public DIEValue {
629 const std::string Label;
631 DIEAsIsLabel(const std::string &L) : DIEValue(isAsIsLabel), Label(L) {}
633 // Implement isa/cast/dyncast.
634 static bool classof(const DIEAsIsLabel *) { return true; }
635 static bool classof(const DIEValue *L) { return L->Type == isAsIsLabel; }
637 /// EmitValue - Emit label value.
639 virtual void EmitValue(const DwarfWriter &DW, unsigned Form) const;
641 /// SizeOf - Determine size of label value in bytes.
643 virtual unsigned SizeOf(const DwarfWriter &DW, unsigned Form) const;
646 //===--------------------------------------------------------------------===//
647 // DIEDelta - A simple label difference DIE.
649 struct DIEDelta : public DIEValue {
650 const DWLabel LabelHi;
651 const DWLabel LabelLo;
653 DIEDelta(const DWLabel &Hi, const DWLabel &Lo)
654 : DIEValue(isDelta), LabelHi(Hi), LabelLo(Lo) {}
656 // Implement isa/cast/dyncast.
657 static bool classof(const DIEDelta *) { return true; }
658 static bool classof(const DIEValue *D) { return D->Type == isDelta; }
660 /// EmitValue - Emit delta value.
662 virtual void EmitValue(const DwarfWriter &DW, unsigned Form) const;
664 /// SizeOf - Determine size of delta value in bytes.
666 virtual unsigned SizeOf(const DwarfWriter &DW, unsigned Form) const;
669 //===--------------------------------------------------------------------===//
670 // DIEntry - A pointer to a debug information entry.
672 struct DIEntry : public DIEValue {
675 DIEntry(DIE *E) : DIEValue(isEntry), Entry(E) {}
677 // Implement isa/cast/dyncast.
678 static bool classof(const DIEntry *) { return true; }
679 static bool classof(const DIEValue *E) { return E->Type == isEntry; }
681 /// EmitValue - Emit delta value.
683 virtual void EmitValue(const DwarfWriter &DW, unsigned Form) const;
685 /// SizeOf - Determine size of delta value in bytes.
687 virtual unsigned SizeOf(const DwarfWriter &DW, unsigned Form) const;
690 //===--------------------------------------------------------------------===//
691 // DIE - A structured debug information entry. Has an abbreviation which
692 // describes it's organization.
695 DIEAbbrev *Abbrev; // Temporary buffer for abbreviation.
696 unsigned AbbrevID; // Decribing abbreviation ID.
697 unsigned Offset; // Offset in debug info section.
698 unsigned Size; // Size of instance + children.
699 DWContext *Context; // Context for types and values.
700 std::vector<DIE *> Children; // Children DIEs.
701 std::vector<DIEValue *> Values; // Attributes values.
704 DIE(unsigned Tag, unsigned ChildrenFlag);
708 unsigned getAbbrevID() const { return AbbrevID; }
709 unsigned getOffset() const { return Offset; }
710 unsigned getSize() const { return Size; }
711 DWContext *getContext() const { return Context; }
712 const std::vector<DIE *> &getChildren() const { return Children; }
713 const std::vector<DIEValue *> &getValues() const { return Values; }
714 void setOffset(unsigned O) { Offset = O; }
715 void setSize(unsigned S) { Size = S; }
716 void setContext(DWContext *C) { Context = C; }
718 /// SiblingOffset - Return the offset of the debug information entry's
720 unsigned SiblingOffset() const { return Offset + Size; }
722 /// AddInt - Add a simple integer attribute data and value.
724 void AddInt(unsigned Attribute, unsigned Form,
725 int Integer, bool IsSigned = false);
727 /// AddString - Add a std::string attribute data and value.
729 void AddString(unsigned Attribute, unsigned Form,
730 const std::string &String);
732 /// AddLabel - Add a Dwarf label attribute data and value.
734 void AddLabel(unsigned Attribute, unsigned Form, const DWLabel &Label);
736 /// AddAsIsLabel - Add a non-Dwarf label attribute data and value.
738 void AddAsIsLabel(unsigned Attribute, unsigned Form,
739 const std::string &Label);
741 /// AddDelta - Add a label delta attribute data and value.
743 void AddDelta(unsigned Attribute, unsigned Form,
744 const DWLabel &Hi, const DWLabel &Lo);
746 /// AddDIEntry - Add a DIE attribute data and value.
748 void AddDIEntry(unsigned Attribute, unsigned Form, DIE *Entry);
750 /// Complete - Indicate that all attributes have been added and
751 /// ready to get an abbreviation ID.
753 void Complete(DwarfWriter &DW);
755 /// AddChild - Add a child to the DIE.
756 void AddChild(DIE *Child);
759 //===--------------------------------------------------------------------===//
760 /// DWContext - Name context for types and values.
764 DwarfWriter &DW; // DwarfWriter for global information.
765 DIE *Owner; // Owning debug information entry.
766 std::map<std::string, DIE*> Types; // Named types in context.
767 std::map<std::string, DIE*> Variables;// Named variables in context.
770 DWContext(DwarfWriter &D, DIE *O)
776 Owner->setContext(this);
780 /// NewBasicType - Creates a new basic type, if necessary, then adds in the
781 /// context and owner.
782 DIE *NewBasicType(const std::string &Name, unsigned Size,
785 /// NewVariable - Creates a basic variable, if necessary, then adds in the
786 /// context and owner.
787 DIE *NewVariable(const std::string &Name,
788 unsigned SourceFileID, unsigned Line,
789 DIE *Type, bool IsExternal);
792 //===--------------------------------------------------------------------===//
793 // DwarfWriter - Emits Dwarf debug and exception handling directives.
798 //===------------------------------------------------------------------===//
799 // Core attributes used by the Dwarf writer.
803 /// O - Stream to .s file.
807 /// Asm - Target of Dwarf emission.
811 /// DebugInfo - Collected debug information.
813 MachineDebugInfo *DebugInfo;
815 /// didInitial - Flag to indicate if initial emission has been done.
819 //===------------------------------------------------------------------===//
820 // Attributes used to construct specific Dwarf sections.
823 /// CompileUnits - All the compile units involved in this build. The index
824 /// of each entry in this vector corresponds to the sources in DebugInfo.
825 std::vector<DIE *> CompileUnits;
827 /// Abbreviations - A UniqueVector of TAG structure abbreviations.
829 UniqueVector<DIEAbbrev> Abbreviations;
831 /// GlobalTypes - A map of globally visible named types.
833 std::map<std::string, DIE *> GlobalTypes;
835 /// GlobalEntities - A map of globally visible named entities.
837 std::map<std::string, DIE *> GlobalEntities;
839 /// StringPool - A UniqueVector of strings used by indirect references.
841 UniqueVector<std::string> StringPool;
843 //===------------------------------------------------------------------===//
844 // Properties to be set by the derived class ctor, used to configure the
848 /// AddressSize - Size of addresses used in file.
850 unsigned AddressSize;
852 /// hasLEB128 - True if target asm supports leb128 directives.
854 bool hasLEB128; /// Defaults to false.
856 /// hasDotLoc - True if target asm supports .loc directives.
858 bool hasDotLoc; /// Defaults to false.
860 /// hasDotFile - True if target asm supports .file directives.
862 bool hasDotFile; /// Defaults to false.
864 /// needsSet - True if target asm can't compute addresses on data
866 bool needsSet; /// Defaults to false.
868 /// DwarfAbbrevSection - Section directive for Dwarf abbrev.
870 const char *DwarfAbbrevSection; /// Defaults to ".debug_abbrev".
872 /// DwarfInfoSection - Section directive for Dwarf info.
874 const char *DwarfInfoSection; /// Defaults to ".debug_info".
876 /// DwarfLineSection - Section directive for Dwarf info.
878 const char *DwarfLineSection; /// Defaults to ".debug_line".
880 /// DwarfFrameSection - Section directive for Dwarf info.
882 const char *DwarfFrameSection; /// Defaults to ".debug_frame".
884 /// DwarfPubNamesSection - Section directive for Dwarf info.
886 const char *DwarfPubNamesSection; /// Defaults to ".debug_pubnames".
888 /// DwarfPubTypesSection - Section directive for Dwarf info.
890 const char *DwarfPubTypesSection; /// Defaults to ".debug_pubtypes".
892 /// DwarfStrSection - Section directive for Dwarf info.
894 const char *DwarfStrSection; /// Defaults to ".debug_str".
896 /// DwarfLocSection - Section directive for Dwarf info.
898 const char *DwarfLocSection; /// Defaults to ".debug_loc".
900 /// DwarfARangesSection - Section directive for Dwarf info.
902 const char *DwarfARangesSection; /// Defaults to ".debug_aranges".
904 /// DwarfRangesSection - Section directive for Dwarf info.
906 const char *DwarfRangesSection; /// Defaults to ".debug_ranges".
908 /// DwarfMacInfoSection - Section directive for Dwarf info.
910 const char *DwarfMacInfoSection; /// Defaults to ".debug_macinfo".
912 /// TextSection - Section directive for standard text.
914 const char *TextSection; /// Defaults to ".text".
916 /// DataSection - Section directive for standard data.
918 const char *DataSection; /// Defaults to ".data".
920 //===------------------------------------------------------------------===//
921 // Emission and print routines
925 /// getAddressSize - Return the size of a target address in bytes.
927 unsigned getAddressSize() const { return AddressSize; }
929 /// PrintHex - Print a value as a hexidecimal value.
931 void PrintHex(int Value) const;
933 /// EOL - Print a newline character to asm stream. If a comment is present
934 /// then it will be printed first. Comments should not contain '\n'.
935 void EOL(const std::string &Comment) const;
937 /// EmitULEB128Bytes - Emit an assembler byte data directive to compose an
938 /// unsigned leb128 value.
939 void EmitULEB128Bytes(unsigned Value) const;
941 /// EmitSLEB128Bytes - print an assembler byte data directive to compose a
942 /// signed leb128 value.
943 void EmitSLEB128Bytes(int Value) const;
945 /// PrintULEB128 - Print a series of hexidecimal values (separated by
946 /// commas) representing an unsigned leb128 value.
947 void PrintULEB128(unsigned Value) const;
949 /// SizeULEB128 - Compute the number of bytes required for an unsigned
951 static unsigned SizeULEB128(unsigned Value);
953 /// PrintSLEB128 - Print a series of hexidecimal values (separated by
954 /// commas) representing a signed leb128 value.
955 void PrintSLEB128(int Value) const;
957 /// SizeSLEB128 - Compute the number of bytes required for a signed leb128
959 static unsigned SizeSLEB128(int Value);
961 /// EmitByte - Emit a byte directive and value.
963 void EmitByte(int Value) const;
965 /// EmitShort - Emit a short directive and value.
967 void EmitShort(int Value) const;
969 /// EmitLong - Emit a long directive and value.
971 void EmitLong(int Value) const;
973 /// EmitString - Emit a string with quotes and a null terminator.
974 /// Special characters are emitted properly. (Eg. '\t')
975 void EmitString(const std::string &String) const;
977 /// PrintLabelName - Print label name in form used by Dwarf writer.
979 void PrintLabelName(DWLabel Label) const {
980 PrintLabelName(Label.Tag, Label.Number);
982 void PrintLabelName(const char *Tag, unsigned Number) const;
984 /// EmitLabel - Emit location label for internal use by Dwarf.
986 void EmitLabel(DWLabel Label) const {
987 EmitLabel(Label.Tag, Label.Number);
989 void EmitLabel(const char *Tag, unsigned Number) const;
991 /// EmitReference - Emit a reference to a label.
993 void EmitReference(DWLabel Label) const {
994 EmitReference(Label.Tag, Label.Number);
996 void EmitReference(const char *Tag, unsigned Number) const;
997 void EmitReference(const std::string &Name) const;
999 /// EmitDifference - Emit the difference between two labels. Some
1000 /// assemblers do not behave with absolute expressions with data directives,
1001 /// so there is an option (needsSet) to use an intermediary set expression.
1002 void EmitDifference(DWLabel LabelHi, DWLabel LabelLo) const {
1003 EmitDifference(LabelHi.Tag, LabelHi.Number, LabelLo.Tag, LabelLo.Number);
1005 void EmitDifference(const char *TagHi, unsigned NumberHi,
1006 const char *TagLo, unsigned NumberLo) const;
1008 /// NewAbbreviation - Add the abbreviation to the Abbreviation vector.
1010 unsigned NewAbbreviation(DIEAbbrev *Abbrev);
1012 /// NewString - Add a string to the constant pool and returns a label.
1014 DWLabel NewString(const std::string &String);
1016 /// NewGlobalType - Make the type visible globally using the given name.
1018 void NewGlobalType(const std::string &Name, DIE *Type);
1020 /// NewGlobalEntity - Make the entity visible globally using the given name.
1022 void NewGlobalEntity(const std::string &Name, DIE *Entity);
1025 /// NewCompileUnit - Create new compile unit information.
1027 DIE *NewCompileUnit(const std::string &Directory,
1028 const std::string &SourceName);
1030 /// EmitInitial - Emit initial Dwarf declarations.
1032 void EmitInitial() const;
1034 /// EmitDIE - Recusively Emits a debug information entry.
1036 void EmitDIE(DIE *Die) const;
1038 /// SizeAndOffsetDie - Compute the size and offset of a DIE.
1040 unsigned SizeAndOffsetDie(DIE *Die, unsigned Offset) const;
1042 /// SizeAndOffsets - Compute the size and offset of all the DIEs.
1044 void SizeAndOffsets();
1046 /// EmitDebugInfo - Emit the debug info section.
1048 void EmitDebugInfo() const;
1050 /// EmitAbbreviations - Emit the abbreviation section.
1052 void EmitAbbreviations() const;
1054 /// EmitDebugLines - Emit source line information.
1056 void EmitDebugLines() const;
1058 /// EmitDebugFrame - Emit info into a debug frame section.
1060 void EmitDebugFrame();
1062 /// EmitDebugPubNames - Emit info into a debug pubnames section.
1064 void EmitDebugPubNames();
1066 /// EmitDebugPubTypes - Emit info into a debug pubtypes section.
1068 void EmitDebugPubTypes();
1070 /// EmitDebugStr - Emit info into a debug str section.
1072 void EmitDebugStr();
1074 /// EmitDebugLoc - Emit info into a debug loc section.
1076 void EmitDebugLoc();
1078 /// EmitDebugARanges - Emit info into a debug aranges section.
1080 void EmitDebugARanges();
1082 /// EmitDebugRanges - Emit info into a debug ranges section.
1084 void EmitDebugRanges();
1086 /// EmitDebugMacInfo - Emit info into a debug macinfo section.
1088 void EmitDebugMacInfo();
1090 /// ShouldEmitDwarf - Returns true if Dwarf declarations should be made.
1091 /// When called it also checks to see if debug info is newly available. if
1092 /// so the initial Dwarf headers are emitted.
1093 bool ShouldEmitDwarf();
1097 DwarfWriter(std::ostream &o, AsmPrinter *ap);
1098 virtual ~DwarfWriter();
1100 /// SetDebugInfo - Set DebugInfo when it's known that pass manager has
1101 /// created it. Set by the target AsmPrinter.
1102 void SetDebugInfo(MachineDebugInfo *di) { DebugInfo = di; }
1104 //===------------------------------------------------------------------===//
1105 // Main entry points.
1108 /// BeginModule - Emit all Dwarf sections that should come prior to the
1112 /// EndModule - Emit all Dwarf sections that should come after the content.
1116 /// BeginFunction - Gather pre-function debug information.
1118 void BeginFunction();
1120 /// EndFunction - Gather and emit post-function debug information.
1125 } // end llvm namespace