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_DWARFPRINTER_H
21 #define LLVM_CODEGEN_DWARFPRINTER_H
23 #include "llvm/ADT/UniqueVector.h"
33 //===--------------------------------------------------------------------===//
34 // Dwarf constants as gleaned from the DWARF Debugging Information Format V.3
35 // reference manual http://dwarf.freestandards.org .
37 enum dwarf_constants {
41 DW_TAG_array_type = 0x01,
42 DW_TAG_class_type = 0x02,
43 DW_TAG_entry_point = 0x03,
44 DW_TAG_enumeration_type = 0x04,
45 DW_TAG_formal_parameter = 0x05,
46 DW_TAG_imported_declaration = 0x08,
48 DW_TAG_lexical_block = 0x0b,
50 DW_TAG_pointer_type = 0x0f,
51 DW_TAG_reference_type = 0x10,
52 DW_TAG_compile_unit = 0x11,
53 DW_TAG_string_type = 0x12,
54 DW_TAG_structure_type = 0x13,
55 DW_TAG_subroutine_type = 0x15,
56 DW_TAG_typedef = 0x16,
57 DW_TAG_union_type = 0x17,
58 DW_TAG_unspecified_parameters = 0x18,
59 DW_TAG_variant = 0x19,
60 DW_TAG_common_block = 0x1a,
61 DW_TAG_common_inclusion = 0x1b,
62 DW_TAG_inheritance = 0x1c,
63 DW_TAG_inlined_subroutine = 0x1d,
65 DW_TAG_ptr_to_member_type = 0x1f,
66 DW_TAG_set_type = 0x20,
67 DW_TAG_subrange_type = 0x21,
68 DW_TAG_with_stmt = 0x22,
69 DW_TAG_access_declaration = 0x23,
70 DW_TAG_base_type = 0x24,
71 DW_TAG_catch_block = 0x25,
72 DW_TAG_const_type = 0x26,
73 DW_TAG_constant = 0x27,
74 DW_TAG_enumerator = 0x28,
75 DW_TAG_file_type = 0x29,
77 DW_TAG_namelist = 0x2b,
78 DW_TAG_namelist_item = 0x2c,
79 DW_TAG_packed_type = 0x2d,
80 DW_TAG_subprogram = 0x2e,
81 DW_TAG_template_type_parameter = 0x2f,
82 DW_TAG_template_value_parameter = 0x30,
83 DW_TAG_thrown_type = 0x31,
84 DW_TAG_try_block = 0x32,
85 DW_TAG_variant_part = 0x33,
86 DW_TAG_variable = 0x34,
87 DW_TAG_volatile_type = 0x35,
88 DW_TAG_dwarf_procedure = 0x36,
89 DW_TAG_restrict_type = 0x37,
90 DW_TAG_interface_type = 0x38,
91 DW_TAG_namespace = 0x39,
92 DW_TAG_imported_module = 0x3a,
93 DW_TAG_unspecified_type = 0x3b,
94 DW_TAG_partial_unit = 0x3c,
95 DW_TAG_imported_unit = 0x3d,
96 DW_TAG_condition = 0x3f,
97 DW_TAG_shared_type = 0x40,
98 DW_TAG_lo_user = 0x4080,
99 DW_TAG_hi_user = 0xffff,
102 DW_CHILDREN_no = 0x00,
103 DW_CHILDREN_yes = 0x01,
106 DW_AT_sibling = 0x01,
107 DW_AT_location = 0x02,
109 DW_AT_ordering = 0x09,
110 DW_AT_byte_size = 0x0b,
111 DW_AT_bit_offset = 0x0c,
112 DW_AT_bit_size = 0x0d,
113 DW_AT_stmt_list = 0x10,
115 DW_AT_high_pc = 0x12,
116 DW_AT_language = 0x13,
118 DW_AT_discr_value = 0x16,
119 DW_AT_visibility = 0x17,
121 DW_AT_string_length = 0x19,
122 DW_AT_common_reference = 0x1a,
123 DW_AT_comp_dir = 0x1b,
124 DW_AT_const_value = 0x1c,
125 DW_AT_containing_type = 0x1d,
126 DW_AT_default_value = 0x1e,
128 DW_AT_is_optional = 0x21,
129 DW_AT_lower_bound = 0x22,
130 DW_AT_producer = 0x25,
131 DW_AT_prototyped = 0x27,
132 DW_AT_return_addr = 0x2a,
133 DW_AT_start_scope = 0x2c,
134 DW_AT_bit_stride = 0x2e,
135 DW_AT_upper_bound = 0x2f,
136 DW_AT_abstract_origin = 0x31,
137 DW_AT_accessibility = 0x32,
138 DW_AT_address_class = 0x33,
139 DW_AT_artificial = 0x34,
140 DW_AT_base_types = 0x35,
141 DW_AT_calling_convention = 0x36,
143 DW_AT_data_member_location = 0x38,
144 DW_AT_decl_column = 0x39,
145 DW_AT_decl_file = 0x3a,
146 DW_AT_decl_line = 0x3b,
147 DW_AT_declaration = 0x3c,
148 DW_AT_discr_list = 0x3d,
149 DW_AT_encoding = 0x3e,
150 DW_AT_external = 0x3f,
151 DW_AT_frame_base = 0x40,
153 DW_AT_identifier_case = 0x42,
154 DW_AT_macro_info = 0x43,
155 DW_AT_namelist_item = 0x44,
156 DW_AT_priority = 0x45,
157 DW_AT_segment = 0x46,
158 DW_AT_specification = 0x47,
159 DW_AT_static_link = 0x48,
161 DW_AT_use_location = 0x4a,
162 DW_AT_variable_parameter = 0x4b,
163 DW_AT_virtuality = 0x4c,
164 DW_AT_vtable_elem_location = 0x4d,
165 DW_AT_allocated = 0x4e,
166 DW_AT_associated = 0x4f,
167 DW_AT_data_location = 0x50,
168 DW_AT_byte_stride = 0x51,
169 DW_AT_entry_pc = 0x52,
170 DW_AT_use_UTF8 = 0x53,
171 DW_AT_extension = 0x54,
173 DW_AT_trampoline = 0x56,
174 DW_AT_call_column = 0x57,
175 DW_AT_call_file = 0x58,
176 DW_AT_call_line = 0x59,
177 DW_AT_description = 0x5a,
178 DW_AT_binary_scale = 0x5b,
179 DW_AT_decimal_scale = 0x5c,
181 DW_AT_decimal_sign = 0x5e,
182 DW_AT_digit_count = 0x5f,
183 DW_AT_picture_string = 0x60,
184 DW_AT_mutable = 0x61,
185 DW_AT_threads_scaled = 0x62,
186 DW_AT_explicit = 0x63,
187 DW_AT_object_pointer = 0x64,
188 DW_AT_endianity = 0x65,
189 DW_AT_elemental = 0x66,
191 DW_AT_recursive = 0x68,
192 DW_AT_lo_user = 0x2000,
193 DW_AT_hi_user = 0x3fff,
195 // Attribute form encodings
197 DW_FORM_block2 = 0x03,
198 DW_FORM_block4 = 0x04,
199 DW_FORM_data2 = 0x05,
200 DW_FORM_data4 = 0x06,
201 DW_FORM_data8 = 0x07,
202 DW_FORM_string = 0x08,
203 DW_FORM_block = 0x09,
204 DW_FORM_block1 = 0x0a,
205 DW_FORM_data1 = 0x0b,
207 DW_FORM_sdata = 0x0d,
209 DW_FORM_udata = 0x0f,
210 DW_FORM_ref_addr = 0x10,
215 DW_FORM_ref_udata = 0x15,
216 DW_FORM_indirect = 0x16,
218 // Operation encodings
221 DW_OP_const1u = 0x08,
222 DW_OP_const1s = 0x09,
223 DW_OP_const2u = 0x0a,
224 DW_OP_const2s = 0x0b,
225 DW_OP_const4u = 0x0c,
226 DW_OP_const4s = 0x0d,
227 DW_OP_const8u = 0x0e,
228 DW_OP_const8s = 0x0f,
248 DW_OP_plus_uconst = 0x23,
274 DW_OP_deref_size = 0x94,
275 DW_OP_xderef_size = 0x95,
277 DW_OP_push_object_address = 0x97,
280 DW_OP_call_ref = 0x9a,
281 DW_OP_form_tls_address = 0x9b,
282 DW_OP_call_frame_cfa = 0x9c,
283 DW_OP_lo_user = 0xe0,
284 DW_OP_hi_user = 0xff,
286 // Encoding attribute values
287 DW_ATE_address = 0x01,
288 DW_ATE_boolean = 0x02,
289 DW_ATE_complex_float = 0x03,
291 DW_ATE_signed = 0x05,
292 DW_ATE_signed_char = 0x06,
293 DW_ATE_unsigned = 0x07,
294 DW_ATE_unsigned_char = 0x08,
295 DW_ATE_imaginary_float = 0x09,
296 DW_ATE_packed_decimal = 0x0a,
297 DW_ATE_numeric_string = 0x0b,
298 DW_ATE_edited = 0x0c,
299 DW_ATE_signed_fixed = 0x0d,
300 DW_ATE_unsigned_fixed = 0x0e,
301 DW_ATE_decimal_float = 0x0f,
302 DW_ATE_lo_user = 0x80,
303 DW_ATE_hi_user = 0xff,
305 // Decimal sign attribute values
306 DW_DS_unsigned = 0x01,
307 DW_DS_leading_overpunch = 0x02,
308 DW_DS_trailing_overpunch = 0x03,
309 DW_DS_leading_separate = 0x04,
310 DW_DS_trailing_separate = 0x05,
312 // Endianity attribute values
313 DW_END_default = 0x00,
315 DW_END_little = 0x02,
316 DW_END_lo_user = 0x40,
317 DW_END_hi_user = 0xff,
319 // Accessibility codes
320 DW_ACCESS_public = 0x01,
321 DW_ACCESS_protected = 0x02,
322 DW_ACCESS_private = 0x03,
326 DW_VIS_exported = 0x02,
327 DW_VIS_qualified = 0x03,
330 DW_VIRTUALITY_none = 0x00,
331 DW_VIRTUALITY_virtual = 0x01,
332 DW_VIRTUALITY_pure_virtual = 0x02,
335 DW_LANG_C89 = 0x0001,
337 DW_LANG_Ada83 = 0x0003,
338 DW_LANG_C_plus_plus = 0x0004,
339 DW_LANG_Cobol74 = 0x0005,
340 DW_LANG_Cobol85 = 0x0006,
341 DW_LANG_Fortran77 = 0x0007,
342 DW_LANG_Fortran90 = 0x0008,
343 DW_LANG_Pascal83 = 0x0009,
344 DW_LANG_Modula2 = 0x000a,
345 DW_LANG_Java = 0x000b,
346 DW_LANG_C99 = 0x000c,
347 DW_LANG_Ada95 = 0x000d,
348 DW_LANG_Fortran95 = 0x000e,
349 DW_LANG_PLI = 0x000f,
350 DW_LANG_ObjC = 0x0010,
351 DW_LANG_ObjC_plus_plus = 0x0011,
352 DW_LANG_UPC = 0x0012,
354 DW_LANG_lo_user = 0x8000,
355 DW_LANG_hi_user = 0xffff,
357 // Identifier case codes
358 DW_ID_case_sensitive = 0x00,
359 DW_ID_up_case = 0x01,
360 DW_ID_down_case = 0x02,
361 DW_ID_case_insensitive = 0x03,
363 // Calling convention codes
365 DW_CC_program = 0x02,
367 DW_CC_lo_user = 0x40,
368 DW_CC_hi_user = 0xff,
371 DW_INL_not_inlined = 0x00,
372 DW_INL_inlined = 0x01,
373 DW_INL_declared_not_inlined = 0x02,
374 DW_INL_declared_inlined = 0x03,
377 DW_ORD_row_major = 0x00,
378 DW_ORD_col_major = 0x01,
380 // Discriminant descriptor values
384 // Line Number Standard Opcode Encodings
386 DW_LNS_advance_pc = 0x02,
387 DW_LNS_advance_line = 0x03,
388 DW_LNS_set_file = 0x04,
389 DW_LNS_set_column = 0x05,
390 DW_LNS_negate_stmt = 0x06,
391 DW_LNS_set_basic_block = 0x07,
392 DW_LNS_const_add_pc = 0x08,
393 DW_LNS_fixed_advance_pc = 0x09,
394 DW_LNS_set_prologue_end = 0x0a,
395 DW_LNS_set_epilogue_begin = 0x0b,
396 DW_LNS_set_isa = 0x0c,
398 // Line Number Extended Opcode Encodings
399 DW_LNE_end_sequence = 0x01,
400 DW_LNE_set_address = 0x02,
401 DW_LNE_define_file = 0x03,
402 DW_LNE_lo_user = 0x80,
403 DW_LNE_hi_user = 0xff,
405 // Macinfo Type Encodings
406 DW_MACINFO_define = 0x01,
407 DW_MACINFO_undef = 0x02,
408 DW_MACINFO_start_file = 0x03,
409 DW_MACINFO_end_file = 0x04,
410 DW_MACINFO_vendor_ext = 0xff,
412 // Call frame instruction encodings
413 DW_CFA_advance_loc = 0x40,
414 DW_CFA_offset = 0x80,
415 DW_CFA_restore = 0xc0,
416 DW_CFA_set_loc = 0x01,
417 DW_CFA_advance_loc1 = 0x02,
418 DW_CFA_advance_loc2 = 0x03,
419 DW_CFA_advance_loc4 = 0x04,
420 DW_CFA_offset_extended = 0x05,
421 DW_CFA_restore_extended = 0x06,
422 DW_CFA_undefined = 0x07,
423 DW_CFA_same_value = 0x08,
424 DW_CFA_register = 0x09,
425 DW_CFA_remember_state = 0x0a,
426 DW_CFA_restore_state = 0x0b,
427 DW_CFA_def_cfa = 0x0c,
428 DW_CFA_def_cfa_register = 0x0d,
429 DW_CFA_def_cfa_offset = 0x0e,
430 DW_CFA_def_cfa_expression = 0x0f,
431 DW_CFA_expression = 0x10,
432 DW_CFA_offset_extended_sf = 0x11,
433 DW_CFA_def_cfa_sf = 0x12,
434 DW_CFA_def_cfa_offset_sf = 0x13,
435 DW_CFA_val_offset = 0x14,
436 DW_CFA_val_offset_sf = 0x15,
437 DW_CFA_val_expression = 0x16,
438 DW_CFA_lo_user = 0x1c,
439 DW_CFA_hi_user = 0x3f
442 //===--------------------------------------------------------------------===//
443 // DWLabel - Labels are used to track locations in the assembler file.
444 // Labels appear in the form <prefix>debug_<Tag><Number>, where the tag is a
445 // category of label (Ex. location) and number is a value unique in that
448 const char *Tag; // Label category tag. Should always be
449 // a staticly declared C string.
450 unsigned Number; // Unique number
452 DWLabel() : Tag(NULL), Number(0) {}
453 DWLabel(const char *T, unsigned N) : Tag(T), Number(N) {}
456 //===--------------------------------------------------------------------===//
457 // DIEAbbrev - Dwarf abbreviation, describes the organization of a debug
458 // information object.
462 const unsigned char *Data; // Static array of bytes containing the
463 // image of the raw abbreviation data.
467 DIEAbbrev(const unsigned char *D)
471 /// operator== - Used by UniqueVector to locate entry.
473 bool operator==(const DIEAbbrev &DA) const {
474 return Data == DA.Data;
477 /// operator< - Used by UniqueVector to locate entry.
479 bool operator<(const DIEAbbrev &DA) const {
480 return Data < DA.Data;
484 unsigned getTag() const { return Data[0]; }
485 unsigned getChildrenFlag() const { return Data[1]; }
486 unsigned getAttribute(unsigned i) const { return Data[2 + 2 * i + 0]; }
487 unsigned getForm(unsigned i) const { return Data[2 + 2 * i + 1]; }
490 //===--------------------------------------------------------------------===//
491 // DIEValue - A debug information entry value.
503 unsigned Type; // Type of the value
505 DIEValue(unsigned T) : Type(T) {}
506 virtual ~DIEValue() {}
508 // Implement isa/cast/dyncast.
509 static bool classof(const DIEValue *) { return true; }
511 /// EmitValue - Emit value via the Dwarf writer.
513 virtual void EmitValue(const DwarfWriter &DW, unsigned Form) const = 0;
515 /// SizeOf - Return the size of a value in bytes.
517 virtual unsigned SizeOf(const DwarfWriter &DW, unsigned Form) const = 0;
520 //===--------------------------------------------------------------------===//
521 // DWInteger - An integer value DIE.
523 class DIEInteger : public DIEValue {
528 DIEInteger(int V) : DIEValue(isInteger), Value(V) {}
530 // Implement isa/cast/dyncast.
531 static bool classof(const DIEInteger *) { return true; }
532 static bool classof(const DIEValue *V) { return V->Type == isInteger; }
534 /// EmitValue - Emit integer of appropriate size.
536 virtual void EmitValue(const DwarfWriter &DW, unsigned Form) const;
538 /// SizeOf - Determine size of integer value in bytes.
540 virtual unsigned SizeOf(const DwarfWriter &DW, unsigned Form) const;
543 //===--------------------------------------------------------------------===//
544 // DIEString - A string value DIE.
546 struct DIEString : public DIEValue {
547 const std::string Value;
549 DIEString(const std::string &V) : DIEValue(isString), Value(V) {}
551 // Implement isa/cast/dyncast.
552 static bool classof(const DIEString *) { return true; }
553 static bool classof(const DIEValue *V) { return V->Type == isString; }
555 /// EmitValue - Emit string value.
557 virtual void EmitValue(const DwarfWriter &DW, unsigned Form) const;
559 /// SizeOf - Determine size of string value in bytes.
561 virtual unsigned SizeOf(const DwarfWriter &DW, unsigned Form) const;
564 //===--------------------------------------------------------------------===//
565 // DIELabel - A simple label expression DIE.
567 struct DIELabel : public DIEValue {
570 DIELabel(const DWLabel &V) : DIEValue(DW_FORM_ref4), Value(V) {}
572 // Implement isa/cast/dyncast.
573 static bool classof(const DWLabel *) { return true; }
574 static bool classof(const DIEValue *V) { return V->Type == isLabel; }
576 /// EmitValue - Emit label value.
578 virtual void EmitValue(const DwarfWriter &DW, unsigned Form) const;
580 /// SizeOf - Determine size of label value in bytes.
582 virtual unsigned SizeOf(const DwarfWriter &DW, unsigned Form) const;
585 //===--------------------------------------------------------------------===//
586 // DIEDelta - A simple label difference DIE.
588 struct DIEDelta : public DIEValue {
589 const DWLabel Value1;
590 const DWLabel Value2;
592 DIEDelta(const DWLabel &V1, const DWLabel &V2)
593 : DIEValue(DW_FORM_addr), Value1(V1), Value2(V2) {}
595 // Implement isa/cast/dyncast.
596 static bool classof(const DIEDelta *) { return true; }
597 static bool classof(const DIEValue *V) { return V->Type == isDelta; }
599 /// EmitValue - Emit delta value.
601 virtual void EmitValue(const DwarfWriter &DW, unsigned Form) const;
603 /// SizeOf - Determine size of delta value in bytes.
605 virtual unsigned SizeOf(const DwarfWriter &DW, unsigned Form) const;
608 //===--------------------------------------------------------------------===//
609 // DIE - A structured debug information entry. Has an abbreviation which
610 // describes it's organization.
613 unsigned AbbrevID; // Decribing abbreviation ID.
614 unsigned Offset; // Offset in debug info section
615 unsigned Size; // Size of instance + children
616 std::vector<DIE *> Children; // Children DIEs
617 std::vector<DIEValue *> Values; // Attributes values
620 DIE(unsigned AbbrevID)
631 unsigned getAbbrevID() const { return AbbrevID; }
632 unsigned getOffset() const { return Offset; }
633 unsigned getSize() const { return Size; }
634 const std::vector<DIE *> &getChildren() const { return Children; }
635 const std::vector<DIEValue *> &getValues() const { return Values; }
636 void setOffset(unsigned O) { Offset = O; }
637 void setSize(unsigned S) { Size = S; }
639 /// AddValue - Add an attribute value of appropriate type.
641 void AddValue(int Value) {
642 Values.push_back(new DIEInteger(Value));
644 void AddValue(const std::string &Value) {
645 Values.push_back(new DIEString(Value));
647 void AddValue(const DWLabel &Value) {
648 Values.push_back(new DIELabel(Value));
650 void AddValue(const DWLabel &Value1, const DWLabel &Value2) {
651 Values.push_back(new DIEDelta(Value1, Value2));
654 /// SiblingOffset - Return the offset of the debug information entry's
656 unsigned SiblingOffset() const { return Offset + Size; }
659 //===--------------------------------------------------------------------===//
660 // Forward declarations.
663 class MachineDebugInfo;
665 //===--------------------------------------------------------------------===//
666 // DwarfWriter - emits Dwarf debug and exception handling directives.
672 //===------------------------------------------------------------------===//
673 // Core attributes used by the Dwarf writer.
677 /// O - Stream to .s file.
681 /// Asm - Target of Dwarf emission.
685 /// DebugInfo - Collected debug information.
687 MachineDebugInfo *DebugInfo;
689 /// didInitial - Flag to indicate if initial emission has been done.
693 //===------------------------------------------------------------------===//
694 // Attributes used to construct specific Dwarf sections.
697 /// CompileUnits - All the compile units involved in this build. The index
698 /// of each entry in this vector corresponds to the sources in DebugInfo.
699 std::vector<DIE *> CompileUnits;
701 /// Abbreviations - A UniqueVector of TAG structure abbreviations.
703 UniqueVector<DIEAbbrev> Abbreviations;
705 //===------------------------------------------------------------------===//
706 // Properties to be set by the derived class ctor, used to configure the
710 /// AddressSize - Size of addresses used in file.
712 unsigned AddressSize;
714 /// hasLEB128 - True if target asm supports leb128 directives.
716 bool hasLEB128; /// Defaults to false.
718 /// hasDotLoc - True if target asm supports .loc directives.
720 bool hasDotLoc; /// Defaults to false.
722 /// hasDotFile - True if target asm supports .file directives.
724 bool hasDotFile; /// Defaults to false.
726 /// needsSet - True if target asm can't compute addresses on data
728 bool needsSet; /// Defaults to false.
730 /// DwarfAbbrevSection - Section directive for Dwarf abbrev.
732 const char *DwarfAbbrevSection; /// Defaults to ".debug_abbrev".
734 /// DwarfInfoSection - Section directive for Dwarf info.
736 const char *DwarfInfoSection; /// Defaults to ".debug_info".
738 /// DwarfLineSection - Section directive for Dwarf info.
740 const char *DwarfLineSection; /// Defaults to ".debug_line".
742 /// TextSection - Section directive for standard text.
744 const char *TextSection; /// Defaults to ".text".
746 /// DataSection - Section directive for standard data.
748 const char *DataSection; /// Defaults to ".data".
750 //===------------------------------------------------------------------===//
751 // Emission and print routines
755 /// getAddressSize - Return the size of a target address in bytes.
757 unsigned getAddressSize() const { return AddressSize; }
759 /// PrintHex - Print a value as a hexidecimal value.
761 void PrintHex(int Value) const;
763 /// EOL - Print a newline character to asm stream. If a comment is present
764 /// then it will be printed first. Comments should not contain '\n'.
765 void EOL(const std::string &Comment) const;
767 /// EmitULEB128Bytes - Emit an assembler byte data directive to compose an
768 /// unsigned leb128 value.
769 void EmitULEB128Bytes(unsigned Value) const;
771 /// EmitSLEB128Bytes - print an assembler byte data directive to compose a
772 /// signed leb128 value.
773 void EmitSLEB128Bytes(int Value) const;
775 /// PrintULEB128 - Print a series of hexidecimal values (separated by
776 /// commas) representing an unsigned leb128 value.
777 void PrintULEB128(unsigned Value) const;
779 /// SizeULEB128 - Compute the number of bytes required for an unsigned
781 static unsigned SizeULEB128(unsigned Value);
783 /// PrintSLEB128 - Print a series of hexidecimal values (separated by
784 /// commas) representing a signed leb128 value.
785 void PrintSLEB128(int Value) const;
787 /// SizeSLEB128 - Compute the number of bytes required for a signed leb128
789 static unsigned SizeSLEB128(int Value);
791 /// EmitByte - Emit a byte directive and value.
793 void EmitByte(int Value) const;
795 /// EmitShort - Emit a short directive and value.
797 void EmitShort(int Value) const;
799 /// EmitLong - Emit a long directive and value.
801 void EmitLong(int Value) const;
803 /// EmitString - Emit a string with quotes and a null terminator.
804 /// Special characters are emitted properly. (Eg. '\t')
805 void DwarfWriter::EmitString(const std::string &String) const;
807 /// PrintLabelName - Print label name in form used by Dwarf writer.
809 void PrintLabelName(DWLabel Label) const {
810 PrintLabelName(Label.Tag, Label.Number);
812 void PrintLabelName(const char *Tag, unsigned Number) const;
814 /// EmitLabel - Emit location label for internal use by Dwarf.
816 void EmitLabel(DWLabel Label) const {
817 EmitLabel(Label.Tag, Label.Number);
819 void EmitLabel(const char *Tag, unsigned Number) const;
821 /// EmitLabelReference - Emit a reference to a label.
823 void EmitLabelReference(DWLabel Label) const {
824 EmitLabelReference(Label.Tag, Label.Number);
826 void EmitLabelReference(const char *Tag, unsigned Number) const;
828 /// EmitDifference - Emit the difference between two labels. Some
829 /// assemblers do not behave with absolute expressions with data directives,
830 /// so there is an option (needsSet) to use an intermediary set expression.
831 void EmitDifference(DWLabel Label1, DWLabel Label2) const {
832 EmitDifference(Label1.Tag, Label1.Number, Label2.Tag, Label2.Number);
834 void EmitDifference(const char *Tag1, unsigned Number1,
835 const char *Tag2, unsigned Number2) const;
838 /// NewDIE - Construct a new structured debug information entry.
840 DIE *NewDIE(const unsigned char *AbbrevData);
842 /// NewCompileUnit - Create new compile unit information.
844 DIE *NewCompileUnit(const std::string &Directory,
845 const std::string &SourceName);
847 /// EmitInitial - Emit initial Dwarf declarations.
849 void EmitInitial() const;
851 /// EmitDIE - Recusively Emits a debug information entry.
853 void EmitDIE(DIE *Die) const;
855 /// SizeAndOffsetDie - Compute the size and offset of a DIE.
857 unsigned SizeAndOffsetDie(DIE *Die, unsigned Offset) const;
859 /// SizeAndOffsets - Compute the size and offset of all the DIEs.
861 void SizeAndOffsets();
863 /// EmitDebugInfo - Emit the debug info section.
865 void EmitDebugInfo() const;
867 /// EmitAbbreviations - Emit the abbreviation section.
869 void EmitAbbreviations() const;
871 /// EmitDebugLines - Emit source line information.
873 void EmitDebugLines() const;
875 /// ShouldEmitDwarf - Returns true if Dwarf declarations should be made.
876 /// When called it also checks to see if debug info is newly available. if
877 /// so the initial Dwarf headers are emitted.
878 bool ShouldEmitDwarf();
882 DwarfWriter(std::ostream &o, AsmPrinter *ap);
883 virtual ~DwarfWriter();
885 /// SetDebugInfo - Set DebugInfo when it's known that pass manager has
886 /// created it. Set by the target AsmPrinter.
887 void SetDebugInfo(MachineDebugInfo *di) { DebugInfo = di; }
889 //===------------------------------------------------------------------===//
893 /// BeginModule - Emit all Dwarf sections that should come prior to the
897 /// EndModule - Emit all Dwarf sections that should come after the content.
901 /// BeginFunction - Emit pre-function debug information.
903 void BeginFunction();
905 /// EndFunction - Emit post-function debug information.
910 } // end llvm namespace