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llvm-project/llvm/lib/CodeGen/DwarfWriter.cpp

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//===-- llvm/CodeGen/DwarfWriter.cpp - Dwarf Framework ----------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by James M. Laskey and is distributed under the
// University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains support for writing dwarf debug info into asm files.
//
//===----------------------------------------------------------------------===//
#include "llvm/CodeGen/DwarfWriter.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/Module.h"
#include "llvm/Type.h"
#include "llvm/CodeGen/AsmPrinter.h"
#include "llvm/CodeGen/MachineDebugInfo.h"
#include "llvm/Support/Dwarf.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Mangler.h"
#include "llvm/Target/TargetMachine.h"
#include <iostream>
using namespace llvm;
static cl::opt<bool>
DwarfVerbose("dwarf-verbose", cl::Hidden,
cl::desc("Add comments to Dwarf directives."));
//===----------------------------------------------------------------------===//
/// TagString - Return the string for the specified tag.
///
static const char *TagString(unsigned Tag) {
switch(Tag) {
case DW_TAG_array_type: return "TAG_array_type";
case DW_TAG_class_type: return "TAG_class_type";
case DW_TAG_entry_point: return "TAG_entry_point";
case DW_TAG_enumeration_type: return "TAG_enumeration_type";
case DW_TAG_formal_parameter: return "TAG_formal_parameter";
case DW_TAG_imported_declaration: return "TAG_imported_declaration";
case DW_TAG_label: return "TAG_label";
case DW_TAG_lexical_block: return "TAG_lexical_block";
case DW_TAG_member: return "TAG_member";
case DW_TAG_pointer_type: return "TAG_pointer_type";
case DW_TAG_reference_type: return "TAG_reference_type";
case DW_TAG_compile_unit: return "TAG_compile_unit";
case DW_TAG_string_type: return "TAG_string_type";
case DW_TAG_structure_type: return "TAG_structure_type";
case DW_TAG_subroutine_type: return "TAG_subroutine_type";
case DW_TAG_typedef: return "TAG_typedef";
case DW_TAG_union_type: return "TAG_union_type";
case DW_TAG_unspecified_parameters: return "TAG_unspecified_parameters";
case DW_TAG_variant: return "TAG_variant";
case DW_TAG_common_block: return "TAG_common_block";
case DW_TAG_common_inclusion: return "TAG_common_inclusion";
case DW_TAG_inheritance: return "TAG_inheritance";
case DW_TAG_inlined_subroutine: return "TAG_inlined_subroutine";
case DW_TAG_module: return "TAG_module";
case DW_TAG_ptr_to_member_type: return "TAG_ptr_to_member_type";
case DW_TAG_set_type: return "TAG_set_type";
case DW_TAG_subrange_type: return "TAG_subrange_type";
case DW_TAG_with_stmt: return "TAG_with_stmt";
case DW_TAG_access_declaration: return "TAG_access_declaration";
case DW_TAG_base_type: return "TAG_base_type";
case DW_TAG_catch_block: return "TAG_catch_block";
case DW_TAG_const_type: return "TAG_const_type";
case DW_TAG_constant: return "TAG_constant";
case DW_TAG_enumerator: return "TAG_enumerator";
case DW_TAG_file_type: return "TAG_file_type";
case DW_TAG_friend: return "TAG_friend";
case DW_TAG_namelist: return "TAG_namelist";
case DW_TAG_namelist_item: return "TAG_namelist_item";
case DW_TAG_packed_type: return "TAG_packed_type";
case DW_TAG_subprogram: return "TAG_subprogram";
case DW_TAG_template_type_parameter: return "TAG_template_type_parameter";
case DW_TAG_template_value_parameter: return "TAG_template_value_parameter";
case DW_TAG_thrown_type: return "TAG_thrown_type";
case DW_TAG_try_block: return "TAG_try_block";
case DW_TAG_variant_part: return "TAG_variant_part";
case DW_TAG_variable: return "TAG_variable";
case DW_TAG_volatile_type: return "TAG_volatile_type";
case DW_TAG_dwarf_procedure: return "TAG_dwarf_procedure";
case DW_TAG_restrict_type: return "TAG_restrict_type";
case DW_TAG_interface_type: return "TAG_interface_type";
case DW_TAG_namespace: return "TAG_namespace";
case DW_TAG_imported_module: return "TAG_imported_module";
case DW_TAG_unspecified_type: return "TAG_unspecified_type";
case DW_TAG_partial_unit: return "TAG_partial_unit";
case DW_TAG_imported_unit: return "TAG_imported_unit";
case DW_TAG_condition: return "TAG_condition";
case DW_TAG_shared_type: return "TAG_shared_type";
case DW_TAG_lo_user: return "TAG_lo_user";
case DW_TAG_hi_user: return "TAG_hi_user";
}
assert(0 && "Unknown Dwarf Tag");
return "";
}
/// ChildrenString - Return the string for the specified children flag.
///
static const char *ChildrenString(unsigned Children) {
switch(Children) {
case DW_CHILDREN_no: return "CHILDREN_no";
case DW_CHILDREN_yes: return "CHILDREN_yes";
}
assert(0 && "Unknown Dwarf ChildrenFlag");
return "";
}
/// AttributeString - Return the string for the specified attribute.
///
static const char *AttributeString(unsigned Attribute) {
switch(Attribute) {
case DW_AT_sibling: return "AT_sibling";
case DW_AT_location: return "AT_location";
case DW_AT_name: return "AT_name";
case DW_AT_ordering: return "AT_ordering";
case DW_AT_byte_size: return "AT_byte_size";
case DW_AT_bit_offset: return "AT_bit_offset";
case DW_AT_bit_size: return "AT_bit_size";
case DW_AT_stmt_list: return "AT_stmt_list";
case DW_AT_low_pc: return "AT_low_pc";
case DW_AT_high_pc: return "AT_high_pc";
case DW_AT_language: return "AT_language";
case DW_AT_discr: return "AT_discr";
case DW_AT_discr_value: return "AT_discr_value";
case DW_AT_visibility: return "AT_visibility";
case DW_AT_import: return "AT_import";
case DW_AT_string_length: return "AT_string_length";
case DW_AT_common_reference: return "AT_common_reference";
case DW_AT_comp_dir: return "AT_comp_dir";
case DW_AT_const_value: return "AT_const_value";
case DW_AT_containing_type: return "AT_containing_type";
case DW_AT_default_value: return "AT_default_value";
case DW_AT_inline: return "AT_inline";
case DW_AT_is_optional: return "AT_is_optional";
case DW_AT_lower_bound: return "AT_lower_bound";
case DW_AT_producer: return "AT_producer";
case DW_AT_prototyped: return "AT_prototyped";
case DW_AT_return_addr: return "AT_return_addr";
case DW_AT_start_scope: return "AT_start_scope";
case DW_AT_bit_stride: return "AT_bit_stride";
case DW_AT_upper_bound: return "AT_upper_bound";
case DW_AT_abstract_origin: return "AT_abstract_origin";
case DW_AT_accessibility: return "AT_accessibility";
case DW_AT_address_class: return "AT_address_class";
case DW_AT_artificial: return "AT_artificial";
case DW_AT_base_types: return "AT_base_types";
case DW_AT_calling_convention: return "AT_calling_convention";
case DW_AT_count: return "AT_count";
case DW_AT_data_member_location: return "AT_data_member_location";
case DW_AT_decl_column: return "AT_decl_column";
case DW_AT_decl_file: return "AT_decl_file";
case DW_AT_decl_line: return "AT_decl_line";
case DW_AT_declaration: return "AT_declaration";
case DW_AT_discr_list: return "AT_discr_list";
case DW_AT_encoding: return "AT_encoding";
case DW_AT_external: return "AT_external";
case DW_AT_frame_base: return "AT_frame_base";
case DW_AT_friend: return "AT_friend";
case DW_AT_identifier_case: return "AT_identifier_case";
case DW_AT_macro_info: return "AT_macro_info";
case DW_AT_namelist_item: return "AT_namelist_item";
case DW_AT_priority: return "AT_priority";
case DW_AT_segment: return "AT_segment";
case DW_AT_specification: return "AT_specification";
case DW_AT_static_link: return "AT_static_link";
case DW_AT_type: return "AT_type";
case DW_AT_use_location: return "AT_use_location";
case DW_AT_variable_parameter: return "AT_variable_parameter";
case DW_AT_virtuality: return "AT_virtuality";
case DW_AT_vtable_elem_location: return "AT_vtable_elem_location";
case DW_AT_allocated: return "AT_allocated";
case DW_AT_associated: return "AT_associated";
case DW_AT_data_location: return "AT_data_location";
case DW_AT_byte_stride: return "AT_byte_stride";
case DW_AT_entry_pc: return "AT_entry_pc";
case DW_AT_use_UTF8: return "AT_use_UTF8";
case DW_AT_extension: return "AT_extension";
case DW_AT_ranges: return "AT_ranges";
case DW_AT_trampoline: return "AT_trampoline";
case DW_AT_call_column: return "AT_call_column";
case DW_AT_call_file: return "AT_call_file";
case DW_AT_call_line: return "AT_call_line";
case DW_AT_description: return "AT_description";
case DW_AT_binary_scale: return "AT_binary_scale";
case DW_AT_decimal_scale: return "AT_decimal_scale";
case DW_AT_small: return "AT_small";
case DW_AT_decimal_sign: return "AT_decimal_sign";
case DW_AT_digit_count: return "AT_digit_count";
case DW_AT_picture_string: return "AT_picture_string";
case DW_AT_mutable: return "AT_mutable";
case DW_AT_threads_scaled: return "AT_threads_scaled";
case DW_AT_explicit: return "AT_explicit";
case DW_AT_object_pointer: return "AT_object_pointer";
case DW_AT_endianity: return "AT_endianity";
case DW_AT_elemental: return "AT_elemental";
case DW_AT_pure: return "AT_pure";
case DW_AT_recursive: return "AT_recursive";
case DW_AT_lo_user: return "AT_lo_user";
case DW_AT_hi_user: return "AT_hi_user";
}
assert(0 && "Unknown Dwarf Attribute");
return "";
}
/// FormEncodingString - Return the string for the specified form encoding.
///
static const char *FormEncodingString(unsigned Encoding) {
switch(Encoding) {
case DW_FORM_addr: return "FORM_addr";
case DW_FORM_block2: return "FORM_block2";
case DW_FORM_block4: return "FORM_block4";
case DW_FORM_data2: return "FORM_data2";
case DW_FORM_data4: return "FORM_data4";
case DW_FORM_data8: return "FORM_data8";
case DW_FORM_string: return "FORM_string";
case DW_FORM_block: return "FORM_block";
case DW_FORM_block1: return "FORM_block1";
case DW_FORM_data1: return "FORM_data1";
case DW_FORM_flag: return "FORM_flag";
case DW_FORM_sdata: return "FORM_sdata";
case DW_FORM_strp: return "FORM_strp";
case DW_FORM_udata: return "FORM_udata";
case DW_FORM_ref_addr: return "FORM_ref_addr";
case DW_FORM_ref1: return "FORM_ref1";
case DW_FORM_ref2: return "FORM_ref2";
case DW_FORM_ref4: return "FORM_ref4";
case DW_FORM_ref8: return "FORM_ref8";
case DW_FORM_ref_udata: return "FORM_ref_udata";
case DW_FORM_indirect: return "FORM_indirect";
}
assert(0 && "Unknown Dwarf Form Encoding");
return "";
}
/// OperationEncodingString - Return the string for the specified operation
/// encoding.
static const char *OperationEncodingString(unsigned Encoding) {
switch(Encoding) {
case DW_OP_addr: return "OP_addr";
case DW_OP_deref: return "OP_deref";
case DW_OP_const1u: return "OP_const1u";
case DW_OP_const1s: return "OP_const1s";
case DW_OP_const2u: return "OP_const2u";
case DW_OP_const2s: return "OP_const2s";
case DW_OP_const4u: return "OP_const4u";
case DW_OP_const4s: return "OP_const4s";
case DW_OP_const8u: return "OP_const8u";
case DW_OP_const8s: return "OP_const8s";
case DW_OP_constu: return "OP_constu";
case DW_OP_consts: return "OP_consts";
case DW_OP_dup: return "OP_dup";
case DW_OP_drop: return "OP_drop";
case DW_OP_over: return "OP_over";
case DW_OP_pick: return "OP_pick";
case DW_OP_swap: return "OP_swap";
case DW_OP_rot: return "OP_rot";
case DW_OP_xderef: return "OP_xderef";
case DW_OP_abs: return "OP_abs";
case DW_OP_and: return "OP_and";
case DW_OP_div: return "OP_div";
case DW_OP_minus: return "OP_minus";
case DW_OP_mod: return "OP_mod";
case DW_OP_mul: return "OP_mul";
case DW_OP_neg: return "OP_neg";
case DW_OP_not: return "OP_not";
case DW_OP_or: return "OP_or";
case DW_OP_plus: return "OP_plus";
case DW_OP_plus_uconst: return "OP_plus_uconst";
case DW_OP_shl: return "OP_shl";
case DW_OP_shr: return "OP_shr";
case DW_OP_shra: return "OP_shra";
case DW_OP_xor: return "OP_xor";
case DW_OP_skip: return "OP_skip";
case DW_OP_bra: return "OP_bra";
case DW_OP_eq: return "OP_eq";
case DW_OP_ge: return "OP_ge";
case DW_OP_gt: return "OP_gt";
case DW_OP_le: return "OP_le";
case DW_OP_lt: return "OP_lt";
case DW_OP_ne: return "OP_ne";
case DW_OP_lit0: return "OP_lit0";
case DW_OP_lit1: return "OP_lit1";
case DW_OP_lit31: return "OP_lit31";
case DW_OP_reg0: return "OP_reg0";
case DW_OP_reg1: return "OP_reg1";
case DW_OP_reg31: return "OP_reg31";
case DW_OP_breg0: return "OP_breg0";
case DW_OP_breg1: return "OP_breg1";
case DW_OP_breg31: return "OP_breg31";
case DW_OP_regx: return "OP_regx";
case DW_OP_fbreg: return "OP_fbreg";
case DW_OP_bregx: return "OP_bregx";
case DW_OP_piece: return "OP_piece";
case DW_OP_deref_size: return "OP_deref_size";
case DW_OP_xderef_size: return "OP_xderef_size";
case DW_OP_nop: return "OP_nop";
case DW_OP_push_object_address: return "OP_push_object_address";
case DW_OP_call2: return "OP_call2";
case DW_OP_call4: return "OP_call4";
case DW_OP_call_ref: return "OP_call_ref";
case DW_OP_form_tls_address: return "OP_form_tls_address";
case DW_OP_call_frame_cfa: return "OP_call_frame_cfa";
case DW_OP_lo_user: return "OP_lo_user";
case DW_OP_hi_user: return "OP_hi_user";
}
assert(0 && "Unknown Dwarf Operation Encoding");
return "";
}
/// AttributeEncodingString - Return the string for the specified attribute
/// encoding.
static const char *AttributeEncodingString(unsigned Encoding) {
switch(Encoding) {
case DW_ATE_address: return "ATE_address";
case DW_ATE_boolean: return "ATE_boolean";
case DW_ATE_complex_float: return "ATE_complex_float";
case DW_ATE_float: return "ATE_float";
case DW_ATE_signed: return "ATE_signed";
case DW_ATE_signed_char: return "ATE_signed_char";
case DW_ATE_unsigned: return "ATE_unsigned";
case DW_ATE_unsigned_char: return "ATE_unsigned_char";
case DW_ATE_imaginary_float: return "ATE_imaginary_float";
case DW_ATE_packed_decimal: return "ATE_packed_decimal";
case DW_ATE_numeric_string: return "ATE_numeric_string";
case DW_ATE_edited: return "ATE_edited";
case DW_ATE_signed_fixed: return "ATE_signed_fixed";
case DW_ATE_unsigned_fixed: return "ATE_unsigned_fixed";
case DW_ATE_decimal_float: return "ATE_decimal_float";
case DW_ATE_lo_user: return "ATE_lo_user";
case DW_ATE_hi_user: return "ATE_hi_user";
}
assert(0 && "Unknown Dwarf Attribute Encoding");
return "";
}
/// DecimalSignString - Return the string for the specified decimal sign
/// attribute.
static const char *DecimalSignString(unsigned Sign) {
switch(Sign) {
case DW_DS_unsigned: return "DS_unsigned";
case DW_DS_leading_overpunch: return "DS_leading_overpunch";
case DW_DS_trailing_overpunch: return "DS_trailing_overpunch";
case DW_DS_leading_separate: return "DS_leading_separate";
case DW_DS_trailing_separate: return "DS_trailing_separate";
}
assert(0 && "Unknown Dwarf Decimal Sign Attribute");
return "";
}
/// EndianityString - Return the string for the specified endianity.
///
static const char *EndianityString(unsigned Endian) {
switch(Endian) {
case DW_END_default: return "END_default";
case DW_END_big: return "END_big";
case DW_END_little: return "END_little";
case DW_END_lo_user: return "END_lo_user";
case DW_END_hi_user: return "END_hi_user";
}
assert(0 && "Unknown Dwarf Endianity");
return "";
}
/// AccessibilityString - Return the string for the specified accessibility.
///
static const char *AccessibilityString(unsigned Access) {
switch(Access) {
// Accessibility codes
case DW_ACCESS_public: return "ACCESS_public";
case DW_ACCESS_protected: return "ACCESS_protected";
case DW_ACCESS_private: return "ACCESS_private";
}
assert(0 && "Unknown Dwarf Accessibility");
return "";
}
/// VisibilityString - Return the string for the specified visibility.
///
static const char *VisibilityString(unsigned Visibility) {
switch(Visibility) {
case DW_VIS_local: return "VIS_local";
case DW_VIS_exported: return "VIS_exported";
case DW_VIS_qualified: return "VIS_qualified";
}
assert(0 && "Unknown Dwarf Visibility");
return "";
}
/// VirtualityString - Return the string for the specified virtuality.
///
static const char *VirtualityString(unsigned Virtuality) {
switch(Virtuality) {
case DW_VIRTUALITY_none: return "VIRTUALITY_none";
case DW_VIRTUALITY_virtual: return "VIRTUALITY_virtual";
case DW_VIRTUALITY_pure_virtual: return "VIRTUALITY_pure_virtual";
}
assert(0 && "Unknown Dwarf Virtuality");
return "";
}
/// LanguageString - Return the string for the specified language.
///
static const char *LanguageString(unsigned Language) {
switch(Language) {
case DW_LANG_C89: return "LANG_C89";
case DW_LANG_C: return "LANG_C";
case DW_LANG_Ada83: return "LANG_Ada83";
case DW_LANG_C_plus_plus: return "LANG_C_plus_plus";
case DW_LANG_Cobol74: return "LANG_Cobol74";
case DW_LANG_Cobol85: return "LANG_Cobol85";
case DW_LANG_Fortran77: return "LANG_Fortran77";
case DW_LANG_Fortran90: return "LANG_Fortran90";
case DW_LANG_Pascal83: return "LANG_Pascal83";
case DW_LANG_Modula2: return "LANG_Modula2";
case DW_LANG_Java: return "LANG_Java";
case DW_LANG_C99: return "LANG_C99";
case DW_LANG_Ada95: return "LANG_Ada95";
case DW_LANG_Fortran95: return "LANG_Fortran95";
case DW_LANG_PLI: return "LANG_PLI";
case DW_LANG_ObjC: return "LANG_ObjC";
case DW_LANG_ObjC_plus_plus: return "LANG_ObjC_plus_plus";
case DW_LANG_UPC: return "LANG_UPC";
case DW_LANG_D: return "LANG_D";
case DW_LANG_lo_user: return "LANG_lo_user";
case DW_LANG_hi_user: return "LANG_hi_user";
}
assert(0 && "Unknown Dwarf Language");
return "";
}
/// CaseString - Return the string for the specified identifier case.
///
static const char *CaseString(unsigned Case) {
switch(Case) {
case DW_ID_case_sensitive: return "ID_case_sensitive";
case DW_ID_up_case: return "ID_up_case";
case DW_ID_down_case: return "ID_down_case";
case DW_ID_case_insensitive: return "ID_case_insensitive";
}
assert(0 && "Unknown Dwarf Identifier Case");
return "";
}
/// ConventionString - Return the string for the specified calling convention.
///
static const char *ConventionString(unsigned Convention) {
switch(Convention) {
case DW_CC_normal: return "CC_normal";
case DW_CC_program: return "CC_program";
case DW_CC_nocall: return "CC_nocall";
case DW_CC_lo_user: return "CC_lo_user";
case DW_CC_hi_user: return "CC_hi_user";
}
assert(0 && "Unknown Dwarf Calling Convention");
return "";
}
/// InlineCodeString - Return the string for the specified inline code.
///
static const char *InlineCodeString(unsigned Code) {
switch(Code) {
case DW_INL_not_inlined: return "INL_not_inlined";
case DW_INL_inlined: return "INL_inlined";
case DW_INL_declared_not_inlined: return "INL_declared_not_inlined";
case DW_INL_declared_inlined: return "INL_declared_inlined";
}
assert(0 && "Unknown Dwarf Inline Code");
return "";
}
/// ArrayOrderString - Return the string for the specified array order.
///
static const char *ArrayOrderString(unsigned Order) {
switch(Order) {
case DW_ORD_row_major: return "ORD_row_major";
case DW_ORD_col_major: return "ORD_col_major";
}
assert(0 && "Unknown Dwarf Array Order");
return "";
}
/// DiscriminantString - Return the string for the specified discriminant
/// descriptor.
static const char *DiscriminantString(unsigned Discriminant) {
switch(Discriminant) {
case DW_DSC_label: return "DSC_label";
case DW_DSC_range: return "DSC_range";
}
assert(0 && "Unknown Dwarf Discriminant Descriptor");
return "";
}
/// LNStandardString - Return the string for the specified line number standard.
///
static const char *LNStandardString(unsigned Standard) {
switch(Standard) {
case DW_LNS_copy: return "LNS_copy";
case DW_LNS_advance_pc: return "LNS_advance_pc";
case DW_LNS_advance_line: return "LNS_advance_line";
case DW_LNS_set_file: return "LNS_set_file";
case DW_LNS_set_column: return "LNS_set_column";
case DW_LNS_negate_stmt: return "LNS_negate_stmt";
case DW_LNS_set_basic_block: return "LNS_set_basic_block";
case DW_LNS_const_add_pc: return "LNS_const_add_pc";
case DW_LNS_fixed_advance_pc: return "LNS_fixed_advance_pc";
case DW_LNS_set_prologue_end: return "LNS_set_prologue_end";
case DW_LNS_set_epilogue_begin: return "LNS_set_epilogue_begin";
case DW_LNS_set_isa: return "LNS_set_isa";
}
assert(0 && "Unknown Dwarf Line Number Standard");
return "";
}
/// LNExtendedString - Return the string for the specified line number extended
/// opcode encodings.
static const char *LNExtendedString(unsigned Encoding) {
switch(Encoding) {
// Line Number Extended Opcode Encodings
case DW_LNE_end_sequence: return "LNE_end_sequence";
case DW_LNE_set_address: return "LNE_set_address";
case DW_LNE_define_file: return "LNE_define_file";
case DW_LNE_lo_user: return "LNE_lo_user";
case DW_LNE_hi_user: return "LNE_hi_user";
}
assert(0 && "Unknown Dwarf Line Number Extended Opcode Encoding");
return "";
}
/// MacinfoString - Return the string for the specified macinfo type encodings.
///
static const char *MacinfoString(unsigned Encoding) {
switch(Encoding) {
// Macinfo Type Encodings
case DW_MACINFO_define: return "MACINFO_define";
case DW_MACINFO_undef: return "MACINFO_undef";
case DW_MACINFO_start_file: return "MACINFO_start_file";
case DW_MACINFO_end_file: return "MACINFO_end_file";
case DW_MACINFO_vendor_ext: return "MACINFO_vendor_ext";
}
assert(0 && "Unknown Dwarf Macinfo Type Encodings");
return "";
}
/// CallFrameString - Return the string for the specified call frame instruction
/// encodings.
static const char *CallFrameString(unsigned Encoding) {
switch(Encoding) {
case DW_CFA_advance_loc: return "CFA_advance_loc";
case DW_CFA_offset: return "CFA_offset";
case DW_CFA_restore: return "CFA_restore";
case DW_CFA_set_loc: return "CFA_set_loc";
case DW_CFA_advance_loc1: return "CFA_advance_loc1";
case DW_CFA_advance_loc2: return "CFA_advance_loc2";
case DW_CFA_advance_loc4: return "CFA_advance_loc4";
case DW_CFA_offset_extended: return "CFA_offset_extended";
case DW_CFA_restore_extended: return "CFA_restore_extended";
case DW_CFA_undefined: return "CFA_undefined";
case DW_CFA_same_value: return "CFA_same_value";
case DW_CFA_register: return "CFA_register";
case DW_CFA_remember_state: return "CFA_remember_state";
case DW_CFA_restore_state: return "CFA_restore_state";
case DW_CFA_def_cfa: return "CFA_def_cfa";
case DW_CFA_def_cfa_register: return "CFA_def_cfa_register";
case DW_CFA_def_cfa_offset: return "CFA_def_cfa_offset";
case DW_CFA_def_cfa_expression: return "CFA_def_cfa_expression";
case DW_CFA_expression: return "CFA_expression";
case DW_CFA_offset_extended_sf: return "CFA_offset_extended_sf";
case DW_CFA_def_cfa_sf: return "CFA_def_cfa_sf";
case DW_CFA_def_cfa_offset_sf: return "CFA_def_cfa_offset_sf";
case DW_CFA_val_offset: return "CFA_val_offset";
case DW_CFA_val_offset_sf: return "CFA_val_offset_sf";
case DW_CFA_val_expression: return "CFA_val_expression";
case DW_CFA_lo_user: return "CFA_lo_user";
case DW_CFA_hi_user: return "CFA_hi_user";
}
assert(0 && "Unknown Dwarf Call Frame Instruction Encodings");
return "";
}
//===----------------------------------------------------------------------===//
/// operator== - Used by UniqueVector to locate entry.
///
bool DIEAbbrev::operator==(const DIEAbbrev &DA) const {
if (Tag != DA.Tag) return false;
if (ChildrenFlag != DA.ChildrenFlag) return false;
if (Data.size() != DA.Data.size()) return false;
for (unsigned i = 0, N = Data.size(); i < N; ++i) {
if (Data[i] != DA.Data[i]) return false;
}
return true;
}
/// operator< - Used by UniqueVector to locate entry.
///
bool DIEAbbrev::operator<(const DIEAbbrev &DA) const {
if (Tag != DA.Tag) return Tag < DA.Tag;
if (ChildrenFlag != DA.ChildrenFlag) return ChildrenFlag < DA.ChildrenFlag;
if (Data.size() != DA.Data.size()) return Data.size() < DA.Data.size();
for (unsigned i = 0, N = Data.size(); i < N; ++i) {
if (Data[i] != DA.Data[i]) return Data[i] < DA.Data[i];
}
return false;
}
/// Emit - Print the abbreviation using the specified Dwarf writer.
///
void DIEAbbrev::Emit(const DwarfWriter &DW) const {
// Emit its Dwarf tag type.
DW.EmitULEB128Bytes(Tag);
DW.EOL(TagString(Tag));
// Emit whether it has children DIEs.
DW.EmitULEB128Bytes(ChildrenFlag);
DW.EOL(ChildrenString(ChildrenFlag));
// For each attribute description.
for (unsigned i = 0, N = Data.size(); i < N; ++i) {
const DIEAbbrevData &AttrData = Data[i];
// Emit attribute type.
DW.EmitULEB128Bytes(AttrData.getAttribute());
DW.EOL(AttributeString(AttrData.getAttribute()));
// Emit form type.
DW.EmitULEB128Bytes(AttrData.getForm());
DW.EOL(FormEncodingString(AttrData.getForm()));
}
// Mark end of abbreviation.
DW.EmitULEB128Bytes(0); DW.EOL("EOM(1)");
DW.EmitULEB128Bytes(0); DW.EOL("EOM(2)");
}
#ifndef NDEBUG
void DIEAbbrev::print(std::ostream &O) {
O << "Abbreviation @"
<< std::hex << (intptr_t)this << std::dec
<< " "
<< TagString(Tag)
<< " "
<< ChildrenString(ChildrenFlag)
<< "\n";
for (unsigned i = 0, N = Data.size(); i < N; ++i) {
O << " "
<< AttributeString(Data[i].getAttribute())
<< " "
<< FormEncodingString(Data[i].getForm())
<< "\n";
}
}
void DIEAbbrev::dump() { print(std::cerr); }
#endif
//===----------------------------------------------------------------------===//
/// EmitValue - Emit integer of appropriate size.
///
void DIEInteger::EmitValue(const DwarfWriter &DW, unsigned Form) const {
switch (Form) {
case DW_FORM_flag: // Fall thru
case DW_FORM_data1: DW.EmitInt8(Integer); break;
case DW_FORM_data2: DW.EmitInt16(Integer); break;
case DW_FORM_data4: DW.EmitInt32(Integer); break;
case DW_FORM_data8: DW.EmitInt64(Integer); break;
case DW_FORM_udata: DW.EmitULEB128Bytes(Integer); break;
case DW_FORM_sdata: DW.EmitSLEB128Bytes(Integer); break;
default: assert(0 && "DIE Value form not supported yet"); break;
}
}
/// SizeOf - Determine size of integer value in bytes.
///
unsigned DIEInteger::SizeOf(const DwarfWriter &DW, unsigned Form) const {
switch (Form) {
case DW_FORM_flag: // Fall thru
case DW_FORM_data1: return sizeof(int8_t);
case DW_FORM_data2: return sizeof(int16_t);
case DW_FORM_data4: return sizeof(int32_t);
case DW_FORM_data8: return sizeof(int64_t);
case DW_FORM_udata: return DW.SizeULEB128(Integer);
case DW_FORM_sdata: return DW.SizeSLEB128(Integer);
default: assert(0 && "DIE Value form not supported yet"); break;
}
return 0;
}
//===----------------------------------------------------------------------===//
/// EmitValue - Emit string value.
///
void DIEString::EmitValue(const DwarfWriter &DW, unsigned Form) const {
DW.EmitString(String);
}
/// SizeOf - Determine size of string value in bytes.
///
unsigned DIEString::SizeOf(const DwarfWriter &DW, unsigned Form) const {
return String.size() + sizeof(char); // sizeof('\0');
}
//===----------------------------------------------------------------------===//
/// EmitValue - Emit label value.
///
void DIEDwarfLabel::EmitValue(const DwarfWriter &DW, unsigned Form) const {
DW.EmitReference(Label);
}
/// SizeOf - Determine size of label value in bytes.
///
unsigned DIEDwarfLabel::SizeOf(const DwarfWriter &DW, unsigned Form) const {
return DW.getAddressSize();
}
//===----------------------------------------------------------------------===//
/// EmitValue - Emit label value.
///
void DIEObjectLabel::EmitValue(const DwarfWriter &DW, unsigned Form) const {
DW.EmitInt8(sizeof(int8_t) + DW.getAddressSize());
DW.EOL("DW_FORM_block1 length");
DW.EmitInt8(DW_OP_addr);
DW.EOL("DW_OP_addr");
DW.EmitReference(Label);
}
/// SizeOf - Determine size of label value in bytes.
///
unsigned DIEObjectLabel::SizeOf(const DwarfWriter &DW, unsigned Form) const {
return sizeof(int8_t) + sizeof(int8_t) + DW.getAddressSize();
}
//===----------------------------------------------------------------------===//
/// EmitValue - Emit delta value.
///
void DIEDelta::EmitValue(const DwarfWriter &DW, unsigned Form) const {
DW.EmitDifference(LabelHi, LabelLo);
}
/// SizeOf - Determine size of delta value in bytes.
///
unsigned DIEDelta::SizeOf(const DwarfWriter &DW, unsigned Form) const {
return DW.getAddressSize();
}
//===----------------------------------------------------------------------===//
/// EmitValue - Emit extry offset.
///
void DIEntry::EmitValue(const DwarfWriter &DW, unsigned Form) const {
DW.EmitInt32(Entry->getOffset());
}
/// SizeOf - Determine size of label value in bytes.
///
unsigned DIEntry::SizeOf(const DwarfWriter &DW, unsigned Form) const {
return sizeof(int32_t);
}
//===----------------------------------------------------------------------===//
DIE::DIE(unsigned Tag)
: Abbrev(new DIEAbbrev(Tag, DW_CHILDREN_no))
, AbbrevID(0)
, Offset(0)
, Size(0)
, Children()
, Values()
{}
DIE::~DIE() {
if (Abbrev) delete Abbrev;
for (unsigned i = 0, N = Children.size(); i < N; ++i) {
delete Children[i];
}
for (unsigned j = 0, M = Values.size(); j < M; ++j) {
delete Values[j];
}
}
/// AddUInt - Add an unsigned integer attribute data and value.
///
void DIE::AddUInt(unsigned Attribute, unsigned Form, uint64_t Integer) {
if (Form == 0) {
if ((unsigned char)Integer == Integer) Form = DW_FORM_data1;
else if ((unsigned short)Integer == Integer) Form = DW_FORM_data2;
else if ((unsigned int)Integer == Integer) Form = DW_FORM_data4;
else Form = DW_FORM_data8;
}
Abbrev->AddAttribute(Attribute, Form);
Values.push_back(new DIEInteger(Integer));
}
/// AddSInt - Add an signed integer attribute data and value.
///
void DIE::AddSInt(unsigned Attribute, unsigned Form, int64_t Integer) {
if (Form == 0) {
if ((char)Integer == Integer) Form = DW_FORM_data1;
else if ((short)Integer == Integer) Form = DW_FORM_data2;
else if ((int)Integer == Integer) Form = DW_FORM_data4;
else Form = DW_FORM_data8;
}
Abbrev->AddAttribute(Attribute, Form);
Values.push_back(new DIEInteger(Integer));
}
/// AddString - Add a std::string attribute data and value.
///
void DIE::AddString(unsigned Attribute, unsigned Form,
const std::string &String) {
Abbrev->AddAttribute(Attribute, Form);
Values.push_back(new DIEString(String));
}
/// AddLabel - Add a Dwarf label attribute data and value.
///
void DIE::AddLabel(unsigned Attribute, unsigned Form,
const DWLabel &Label) {
Abbrev->AddAttribute(Attribute, Form);
Values.push_back(new DIEDwarfLabel(Label));
}
/// AddObjectLabel - Add an non-Dwarf label attribute data and value.
///
void DIE::AddObjectLabel(unsigned Attribute, unsigned Form,
const std::string &Label) {
Abbrev->AddAttribute(Attribute, Form);
Values.push_back(new DIEObjectLabel(Label));
}
/// AddDelta - Add a label delta attribute data and value.
///
void DIE::AddDelta(unsigned Attribute, unsigned Form,
const DWLabel &Hi, const DWLabel &Lo) {
Abbrev->AddAttribute(Attribute, Form);
Values.push_back(new DIEDelta(Hi, Lo));
}
/// AddDIEntry - Add a DIE attribute data and value.
///
void DIE::AddDIEntry(unsigned Attribute,
unsigned Form, DIE *Entry) {
Abbrev->AddAttribute(Attribute, Form);
Values.push_back(new DIEntry(Entry));
}
/// Complete - Indicate that all attributes have been added and ready to get an
/// abbreviation ID.
void DIE::Complete(DwarfWriter &DW) {
AbbrevID = DW.NewAbbreviation(Abbrev);
delete Abbrev;
Abbrev = NULL;
}
/// AddChild - Add a child to the DIE.
///
void DIE::AddChild(DIE *Child) {
assert(Abbrev && "Adding children without an abbreviation");
Abbrev->setChildrenFlag(DW_CHILDREN_yes);
Children.push_back(Child);
}
//===----------------------------------------------------------------------===//
/// DWContext
//===----------------------------------------------------------------------===//
/// PrintHex - Print a value as a hexidecimal value.
///
void DwarfWriter::PrintHex(int Value) const {
O << "0x" << std::hex << Value << std::dec;
}
/// EOL - Print a newline character to asm stream. If a comment is present
/// then it will be printed first. Comments should not contain '\n'.
void DwarfWriter::EOL(const std::string &Comment) const {
if (DwarfVerbose) {
O << "\t"
<< Asm->CommentString
<< " "
<< Comment;
}
O << "\n";
}
/// EmitULEB128Bytes - Emit an assembler byte data directive to compose an
/// unsigned leb128 value.
void DwarfWriter::EmitULEB128Bytes(unsigned Value) const {
if (hasLEB128) {
O << "\t.uleb128\t"
<< Value;
} else {
O << Asm->Data8bitsDirective;
PrintULEB128(Value);
}
}
/// EmitSLEB128Bytes - Emit an assembler byte data directive to compose a
/// signed leb128 value.
void DwarfWriter::EmitSLEB128Bytes(int Value) const {
if (hasLEB128) {
O << "\t.sleb128\t"
<< Value;
} else {
O << Asm->Data8bitsDirective;
PrintSLEB128(Value);
}
}
/// PrintULEB128 - Print a series of hexidecimal values (separated by commas)
/// representing an unsigned leb128 value.
void DwarfWriter::PrintULEB128(unsigned Value) const {
do {
unsigned Byte = Value & 0x7f;
Value >>= 7;
if (Value) Byte |= 0x80;
PrintHex(Byte);
if (Value) O << ", ";
} while (Value);
}
/// SizeULEB128 - Compute the number of bytes required for an unsigned leb128
/// value.
unsigned DwarfWriter::SizeULEB128(unsigned Value) {
unsigned Size = 0;
do {
Value >>= 7;
Size += sizeof(int8_t);
} while (Value);
return Size;
}
/// PrintSLEB128 - Print a series of hexidecimal values (separated by commas)
/// representing a signed leb128 value.
void DwarfWriter::PrintSLEB128(int Value) const {
int Sign = Value >> (8 * sizeof(Value) - 1);
bool IsMore;
do {
unsigned Byte = Value & 0x7f;
Value >>= 7;
IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
if (IsMore) Byte |= 0x80;
PrintHex(Byte);
if (IsMore) O << ", ";
} while (IsMore);
}
/// SizeSLEB128 - Compute the number of bytes required for a signed leb128
/// value.
unsigned DwarfWriter::SizeSLEB128(int Value) {
unsigned Size = 0;
int Sign = Value >> (8 * sizeof(Value) - 1);
bool IsMore;
do {
unsigned Byte = Value & 0x7f;
Value >>= 7;
IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
Size += sizeof(int8_t);
} while (IsMore);
return Size;
}
/// EmitInt8 - Emit a byte directive and value.
///
void DwarfWriter::EmitInt8(int Value) const {
O << Asm->Data8bitsDirective;
PrintHex(Value & 0xFF);
}
/// EmitInt16 - Emit a short directive and value.
///
void DwarfWriter::EmitInt16(int Value) const {
O << Asm->Data16bitsDirective;
PrintHex(Value & 0xFFFF);
}
/// EmitInt32 - Emit a long directive and value.
///
void DwarfWriter::EmitInt32(int Value) const {
O << Asm->Data32bitsDirective;
PrintHex(Value);
}
/// EmitInt64 - Emit a long long directive and value.
///
void DwarfWriter::EmitInt64(uint64_t Value) const {
if (Asm->Data64bitsDirective) {
O << Asm->Data64bitsDirective << "0x" << std::hex << Value << std::dec;
} else {
const TargetData &TD = Asm->TM.getTargetData();
if (TD.isBigEndian()) {
EmitInt32(unsigned(Value >> 32)); O << "\n";
EmitInt32(unsigned(Value));
} else {
EmitInt32(unsigned(Value)); O << "\n";
EmitInt32(unsigned(Value >> 32));
}
}
}
/// EmitString - Emit a string with quotes and a null terminator.
/// Special characters are emitted properly. (Eg. '\t')
void DwarfWriter::EmitString(const std::string &String) const {
O << Asm->AsciiDirective
<< "\"";
for (unsigned i = 0, N = String.size(); i < N; ++i) {
unsigned char C = String[i];
if (!isascii(C) || iscntrl(C)) {
switch(C) {
case '\b': O << "\\b"; break;
case '\f': O << "\\f"; break;
case '\n': O << "\\n"; break;
case '\r': O << "\\r"; break;
case '\t': O << "\\t"; break;
default:
O << '\\';
O << char('0' + (C >> 6));
O << char('0' + (C >> 3));
O << char('0' + (C >> 0));
break;
}
} else if (C == '\"') {
O << "\\\"";
} else if (C == '\'') {
O << "\\\'";
} else {
O << C;
}
}
O << "\\0\"";
}
/// PrintLabelName - Print label name in form used by Dwarf writer.
///
void DwarfWriter::PrintLabelName(const char *Tag, unsigned Number) const {
O << Asm->PrivateGlobalPrefix
<< "debug_"
<< Tag;
if (Number) O << Number;
}
/// EmitLabel - Emit location label for internal use by Dwarf.
///
void DwarfWriter::EmitLabel(const char *Tag, unsigned Number) const {
PrintLabelName(Tag, Number);
O << ":\n";
}
/// EmitReference - Emit a reference to a label.
///
void DwarfWriter::EmitReference(const char *Tag, unsigned Number) const {
if (AddressSize == 4)
O << Asm->Data32bitsDirective;
else
O << Asm->Data64bitsDirective;
PrintLabelName(Tag, Number);
}
void DwarfWriter::EmitReference(const std::string &Name) const {
if (AddressSize == 4)
O << Asm->Data32bitsDirective;
else
O << Asm->Data64bitsDirective;
O << Name;
}
/// EmitDifference - Emit an label difference as sizeof(pointer) value. Some
/// assemblers do not accept absolute expressions with data directives, so there
/// is an option (needsSet) to use an intermediary 'set' expression.
void DwarfWriter::EmitDifference(const char *TagHi, unsigned NumberHi,
const char *TagLo, unsigned NumberLo) const {
if (needsSet) {
static unsigned SetCounter = 0;
O << "\t.set\t";
PrintLabelName("set", SetCounter);
O << ",";
PrintLabelName(TagHi, NumberHi);
O << "-";
PrintLabelName(TagLo, NumberLo);
O << "\n";
if (AddressSize == sizeof(int32_t))
O << Asm->Data32bitsDirective;
else
O << Asm->Data64bitsDirective;
PrintLabelName("set", SetCounter);
++SetCounter;
} else {
if (AddressSize == sizeof(int32_t))
O << Asm->Data32bitsDirective;
else
O << Asm->Data64bitsDirective;
PrintLabelName(TagHi, NumberHi);
O << "-";
PrintLabelName(TagLo, NumberLo);
}
}
/// NewAbbreviation - Add the abbreviation to the Abbreviation vector.
///
unsigned DwarfWriter::NewAbbreviation(DIEAbbrev *Abbrev) {
return Abbreviations.insert(*Abbrev);
}
/// NewString - Add a string to the constant pool and returns a label.
///
DWLabel DwarfWriter::NewString(const std::string &String) {
unsigned StringID = StringPool.insert(String);
return DWLabel("string", StringID);
}
/// NewBasicType - Creates a new basic type if necessary, then adds to the
/// owner.
/// FIXME - Should never be needed.
DIE *DwarfWriter::NewBasicType(DIE *Owner, Type *Ty) {
DIE *&Slot = TypeToDieMap[Ty];
if (Slot) return Slot;
const char *Name;
unsigned Size;
unsigned Encoding = 0;
switch (Ty->getTypeID()) {
case Type::UByteTyID:
Name = "unsigned char";
Size = 1;
Encoding = DW_ATE_unsigned_char;
break;
case Type::SByteTyID:
Name = "char";
Size = 1;
Encoding = DW_ATE_signed_char;
break;
case Type::UShortTyID:
Name = "unsigned short";
Size = 2;
Encoding = DW_ATE_unsigned;
break;
case Type::ShortTyID:
Name = "short";
Size = 2;
Encoding = DW_ATE_signed;
break;
case Type::UIntTyID:
Name = "unsigned int";
Size = 4;
Encoding = DW_ATE_unsigned;
break;
case Type::IntTyID:
Name = "int";
Size = 4;
Encoding = DW_ATE_signed;
break;
case Type::ULongTyID:
Name = "unsigned long long";
Size = 7;
Encoding = DW_ATE_unsigned;
break;
case Type::LongTyID:
Name = "long long";
Size = 7;
Encoding = DW_ATE_signed;
break;
case Type::FloatTyID:
Name = "float";
Size = 4;
Encoding = DW_ATE_float;
break;
case Type::DoubleTyID:
Name = "double";
Size = 8;
Encoding = DW_ATE_float;
break;
default:
// FIXME - handle more complex types.
Name = "unknown";
Size = 1;
Encoding = DW_ATE_address;
break;
}
// construct the type DIE.
Slot = new DIE(DW_TAG_base_type);
Slot->AddString(DW_AT_name, DW_FORM_string, Name);
Slot->AddUInt (DW_AT_byte_size, 0, Size);
Slot->AddUInt (DW_AT_encoding, DW_FORM_data1, Encoding);
// Add to context owner.
Owner->AddChild(Slot);
return Slot;
}
/// NewGlobalType - Make the type visible globally using the given name.
///
void DwarfWriter::NewGlobalType(const std::string &Name, DIE *Type) {
assert(!GlobalTypes[Name] && "Duplicate global type");
GlobalTypes[Name] = Type;
}
/// NewGlobalEntity - Make the entity visible globally using the given name.
///
void DwarfWriter::NewGlobalEntity(const std::string &Name, DIE *Entity) {
assert(!GlobalEntities[Name] && "Duplicate global variable or function");
GlobalEntities[Name] = Entity;
}
/// NewType - Create a new type DIE.
///
DIE *DwarfWriter::NewType(DIE *Unit, TypeDesc *TyDesc) {
// FIXME - hack to get around NULL types short term.
if (!TyDesc) return NewBasicType(Unit, Type::IntTy);
// Check for pre-existence.
DIE *&Slot = DescToDieMap[TyDesc];
if (Slot) return Slot;
// Get core information.
const std::string &Name = TyDesc->getName();
// FIXME - handle larger sizes.
unsigned Size = TyDesc->getSize() >> 3;
DIE *Ty = NULL;
if (BasicTypeDesc *BasicTy = dyn_cast<BasicTypeDesc>(TyDesc)) {
// Fundamental types like int, float, bool
Slot = Ty = new DIE(DW_TAG_base_type);
unsigned Encoding = BasicTy->getEncoding();
Ty->AddUInt (DW_AT_encoding, DW_FORM_data1, Encoding);
} else if (DerivedTypeDesc *DerivedTy = dyn_cast<DerivedTypeDesc>(TyDesc)) {
// Determine which derived type.
unsigned T = 0;
switch (DerivedTy->getTag()) {
case DI_TAG_typedef: T = DW_TAG_typedef; break;
case DI_TAG_pointer: T = DW_TAG_pointer_type; break;
case DI_TAG_reference: T = DW_TAG_reference_type; break;
default: assert( 0 && "Unknown tag on derived type");
}
// Create specific DIE.
Slot = Ty = new DIE(T);
// Map to main type, void will not have a type.
if (TypeDesc *FromTy = DerivedTy->getFromType()) {
Ty->AddDIEntry(DW_AT_type, DW_FORM_ref4, NewType(Unit, FromTy));
}
}
assert(Ty && "Type not supported yet");
// Add size if non-zero (derived types don't have a size.)
if (Size) Ty->AddUInt(DW_AT_byte_size, 0, Size);
// Add name if not anonymous or intermediate type.
if (!Name.empty()) Ty->AddString(DW_AT_name, DW_FORM_string, Name);
// Add source line info if present.
if (CompileUnitDesc *File = TyDesc->getFile()) {
unsigned FileID = DebugInfo->RecordSource(File);
int Line = TyDesc->getLine();
Ty->AddUInt(DW_AT_decl_file, 0, FileID);
Ty->AddUInt(DW_AT_decl_line, 0, Line);
}
// Add to context owner.
Unit->AddChild(Ty);
return Slot;
}
/// NewCompileUnit - Create new compile unit DIE.
///
DIE *DwarfWriter::NewCompileUnit(CompileUnitDesc *CompileUnit) {
// Check for pre-existence.
DIE *&Slot = DescToDieMap[CompileUnit];
if (Slot) return Slot;
DIE *Unit = new DIE(DW_TAG_compile_unit);
// FIXME - use the correct line set.
Unit->AddLabel (DW_AT_stmt_list, DW_FORM_data4, DWLabel("section_line", 0));
Unit->AddLabel (DW_AT_high_pc, DW_FORM_addr, DWLabel("text_end", 0));
Unit->AddLabel (DW_AT_low_pc, DW_FORM_addr, DWLabel("text_begin", 0));
Unit->AddString(DW_AT_producer, DW_FORM_string, CompileUnit->getProducer());
Unit->AddUInt (DW_AT_language, DW_FORM_data1, CompileUnit->getLanguage());
Unit->AddString(DW_AT_name, DW_FORM_string, CompileUnit->getFileName());
Unit->AddString(DW_AT_comp_dir, DW_FORM_string, CompileUnit->getDirectory());
Slot = Unit;
return Unit;
}
/// NewGlobalVariable - Add a new global variable DIE.
///
DIE *DwarfWriter::NewGlobalVariable(GlobalVariableDesc *GVD) {
// Check for pre-existence.
DIE *&Slot = DescToDieMap[GVD];
if (Slot) return Slot;
// Get the compile unit context.
CompileUnitDesc *CompileUnit =
static_cast<CompileUnitDesc *>(GVD->getContext());
DIE *Unit = NewCompileUnit(CompileUnit);
// Get the global variable itself.
GlobalVariable *GV = GVD->getGlobalVariable();
// Generate the mangled name.
std::string MangledName = Asm->Mang->getValueName(GV);
// Gather the details (simplify add attribute code.)
const std::string &Name = GVD->getName();
unsigned FileID = DebugInfo->RecordSource(CompileUnit);
unsigned Line = GVD->getLine();
// Get the global's type.
DIE *Type = NewType(Unit, GVD->getTypeDesc());
// Create the globale variable DIE.
DIE *VariableDie = new DIE(DW_TAG_variable);
VariableDie->AddString (DW_AT_name, DW_FORM_string, Name);
VariableDie->AddUInt (DW_AT_decl_file, 0, FileID);
VariableDie->AddUInt (DW_AT_decl_line, 0, Line);
VariableDie->AddDIEntry (DW_AT_type, DW_FORM_ref4, Type);
VariableDie->AddUInt (DW_AT_external, DW_FORM_flag, 1);
// FIXME - needs to be a proper expression.
VariableDie->AddObjectLabel(DW_AT_location, DW_FORM_block1, MangledName);
// Add to map.
Slot = VariableDie;
// Add to context owner.
Unit->AddChild(VariableDie);
// Expose as global.
NewGlobalEntity(Name, VariableDie);
return VariableDie;
}
/// NewSubprogram - Add a new subprogram DIE.
///
DIE *DwarfWriter::NewSubprogram(SubprogramDesc *SPD) {
// Check for pre-existence.
DIE *&Slot = DescToDieMap[SPD];
if (Slot) return Slot;
// Get the compile unit context.
CompileUnitDesc *CompileUnit =
static_cast<CompileUnitDesc *>(SPD->getContext());
DIE *Unit = NewCompileUnit(CompileUnit);
// Gather the details (simplify add attribute code.)
const std::string &Name = SPD->getName();
unsigned FileID = DebugInfo->RecordSource(CompileUnit);
// FIXME - faking the line for the time being.
unsigned Line = 1;
// FIXME - faking the type for the time being.
DIE *Type = NewBasicType(Unit, Type::IntTy);
DIE *SubprogramDie = new DIE(DW_TAG_variable);
SubprogramDie->AddString (DW_AT_name, DW_FORM_string, Name);
SubprogramDie->AddUInt (DW_AT_decl_file, 0, FileID);
SubprogramDie->AddUInt (DW_AT_decl_line, 0, Line);
SubprogramDie->AddDIEntry (DW_AT_type, DW_FORM_ref4, Type);
SubprogramDie->AddUInt (DW_AT_external, DW_FORM_flag, 1);
// Add to map.
Slot = SubprogramDie;
// Add to context owner.
Unit->AddChild(SubprogramDie);
// Expose as global.
NewGlobalEntity(Name, SubprogramDie);
return SubprogramDie;
}
/// EmitInitial - Emit initial Dwarf declarations. This is necessary for cc
/// tools to recognize the object file contains Dwarf information.
///
void DwarfWriter::EmitInitial() const {
// Dwarf sections base addresses.
Asm->SwitchSection(DwarfFrameSection, 0);
EmitLabel("section_frame", 0);
Asm->SwitchSection(DwarfInfoSection, 0);
EmitLabel("section_info", 0);
EmitLabel("info", 0);
Asm->SwitchSection(DwarfAbbrevSection, 0);
EmitLabel("section_abbrev", 0);
EmitLabel("abbrev", 0);
Asm->SwitchSection(DwarfARangesSection, 0);
EmitLabel("section_aranges", 0);
Asm->SwitchSection(DwarfMacInfoSection, 0);
EmitLabel("section_macinfo", 0);
Asm->SwitchSection(DwarfLineSection, 0);
EmitLabel("section_line", 0);
EmitLabel("line", 0);
Asm->SwitchSection(DwarfLocSection, 0);
EmitLabel("section_loc", 0);
Asm->SwitchSection(DwarfPubNamesSection, 0);
EmitLabel("section_pubnames", 0);
Asm->SwitchSection(DwarfStrSection, 0);
EmitLabel("section_str", 0);
Asm->SwitchSection(DwarfRangesSection, 0);
EmitLabel("section_ranges", 0);
Asm->SwitchSection(TextSection, 0);
EmitLabel("text_begin", 0);
Asm->SwitchSection(DataSection, 0);
EmitLabel("data_begin", 0);
}
/// EmitDIE - Recusively Emits a debug information entry.
///
void DwarfWriter::EmitDIE(DIE *Die) const {
// Get the abbreviation for this DIE.
unsigned AbbrevID = Die->getAbbrevID();
const DIEAbbrev &Abbrev = Abbreviations[AbbrevID];
// Emit the code (index) for the abbreviation.
EmitULEB128Bytes(AbbrevID);
EOL(std::string("Abbrev [" +
utostr(AbbrevID) +
"] " +
TagString(Abbrev.getTag())) +
" ");
const std::vector<DIEValue *> &Values = Die->getValues();
const std::vector<DIEAbbrevData> &AbbrevData = Abbrev.getData();
// Emit the DIE attribute values.
for (unsigned i = 0, N = Values.size(); i < N; ++i) {
unsigned Attr = AbbrevData[i].getAttribute();
unsigned Form = AbbrevData[i].getForm();
assert(Form && "Too many attributes for DIE (check abbreviation)");
switch (Attr) {
case DW_AT_sibling: {
EmitInt32(Die->SiblingOffset());
break;
}
default: {
// Emit an attribute using the defined form.
Values[i]->EmitValue(*this, Form);
break;
}
}
EOL(AttributeString(Attr));
}
// Emit the DIE children if any.
if (Abbrev.getChildrenFlag() == DW_CHILDREN_yes) {
const std::vector<DIE *> &Children = Die->getChildren();
for (unsigned j = 0, M = Children.size(); j < M; ++j) {
// FIXME - handle sibling offsets.
// FIXME - handle all DIE types.
EmitDIE(Children[j]);
}
EmitInt8(0); EOL("End Of Children Mark");
}
}
/// SizeAndOffsetDie - Compute the size and offset of a DIE.
///
unsigned DwarfWriter::SizeAndOffsetDie(DIE *Die, unsigned Offset) {
// Record the abbreviation.
Die->Complete(*this);
// Get the abbreviation for this DIE.
unsigned AbbrevID = Die->getAbbrevID();
const DIEAbbrev &Abbrev = Abbreviations[AbbrevID];
// Set DIE offset
Die->setOffset(Offset);
// Start the size with the size of abbreviation code.
Offset += SizeULEB128(AbbrevID);
const std::vector<DIEValue *> &Values = Die->getValues();
const std::vector<DIEAbbrevData> &AbbrevData = Abbrev.getData();
// Emit the DIE attribute values.
for (unsigned i = 0, N = Values.size(); i < N; ++i) {
// Size attribute value.
Offset += Values[i]->SizeOf(*this, AbbrevData[i].getForm());
}
// Emit the DIE children if any.
if (Abbrev.getChildrenFlag() == DW_CHILDREN_yes) {
const std::vector<DIE *> &Children = Die->getChildren();
for (unsigned j = 0, M = Children.size(); j < M; ++j) {
// FIXME - handle sibling offsets.
// FIXME - handle all DIE types.
Offset = SizeAndOffsetDie(Children[j], Offset);
}
// End of children marker.
Offset += sizeof(int8_t);
}
Die->setSize(Offset - Die->getOffset());
return Offset;
}
/// SizeAndOffsets - Compute the size and offset of all the DIEs.
///
void DwarfWriter::SizeAndOffsets() {
// Compute size of debug unit header
unsigned Offset = sizeof(int32_t) + // Length of Compilation Unit Info
sizeof(int16_t) + // DWARF version number
sizeof(int32_t) + // Offset Into Abbrev. Section
sizeof(int8_t); // Pointer Size (in bytes)
// Process each compile unit.
for (unsigned i = 0, N = CompileUnits.size(); i < N; ++i) {
Offset = SizeAndOffsetDie(CompileUnits[i], Offset);
}
}
/// EmitDebugInfo - Emit the debug info section.
///
void DwarfWriter::EmitDebugInfo() const {
// Start debug info section.
Asm->SwitchSection(DwarfInfoSection, 0);
// Get the number of compile units.
unsigned N = CompileUnits.size();
// If there are any compile units.
if (N) {
EmitLabel("info_begin", 0);
// Emit the compile units header.
// Emit size of content not including length itself
unsigned ContentSize = CompileUnits[N - 1]->SiblingOffset();
EmitInt32(ContentSize - sizeof(int32_t));
EOL("Length of Compilation Unit Info");
EmitInt16(DWARF_VERSION); EOL("DWARF version number");
EmitReference("abbrev_begin", 0); EOL("Offset Into Abbrev. Section");
EmitInt8(AddressSize); EOL("Address Size (in bytes)");
// Process each compile unit.
for (unsigned i = 0; i < N; ++i) {
EmitDIE(CompileUnits[i]);
}
EmitLabel("info_end", 0);
}
}
/// EmitAbbreviations - Emit the abbreviation section.
///
void DwarfWriter::EmitAbbreviations() const {
// Check to see if it is worth the effort.
if (!Abbreviations.empty()) {
// Start the debug abbrev section.
Asm->SwitchSection(DwarfAbbrevSection, 0);
EmitLabel("abbrev_begin", 0);
// For each abbrevation.
for (unsigned AbbrevID = 1, NAID = Abbreviations.size();
AbbrevID <= NAID; ++AbbrevID) {
// Get abbreviation data
const DIEAbbrev &Abbrev = Abbreviations[AbbrevID];
// Emit the abbrevations code (base 1 index.)
EmitULEB128Bytes(AbbrevID); EOL("Abbreviation Code");
// Emit the abbreviations data.
Abbrev.Emit(*this);
}
EmitLabel("abbrev_end", 0);
}
}
/// EmitDebugLines - Emit source line information.
///
void DwarfWriter::EmitDebugLines() const {
// Minimum line delta, thus ranging from -10..(255-10).
const int MinLineDelta = -(DW_LNS_fixed_advance_pc + 1);
// Maximum line delta, thus ranging from -10..(255-10).
const int MaxLineDelta = 255 + MinLineDelta;
// Start the dwarf line section.
Asm->SwitchSection(DwarfLineSection, 0);
// Construct the section header.
EmitDifference("line_end", 0, "line_begin", 0);
EOL("Length of Source Line Info");
EmitLabel("line_begin", 0);
EmitInt16(DWARF_VERSION); EOL("DWARF version number");
EmitDifference("line_prolog_end", 0, "line_prolog_begin", 0);
EOL("Prolog Length");
EmitLabel("line_prolog_begin", 0);
EmitInt8(1); EOL("Minimum Instruction Length");
EmitInt8(1); EOL("Default is_stmt_start flag");
EmitInt8(MinLineDelta); EOL("Line Base Value (Special Opcodes)");
EmitInt8(MaxLineDelta); EOL("Line Range Value (Special Opcodes)");
EmitInt8(-MinLineDelta); EOL("Special Opcode Base");
// Line number standard opcode encodings argument count
EmitInt8(0); EOL("DW_LNS_copy arg count");
EmitInt8(1); EOL("DW_LNS_advance_pc arg count");
EmitInt8(1); EOL("DW_LNS_advance_line arg count");
EmitInt8(1); EOL("DW_LNS_set_file arg count");
EmitInt8(1); EOL("DW_LNS_set_column arg count");
EmitInt8(0); EOL("DW_LNS_negate_stmt arg count");
EmitInt8(0); EOL("DW_LNS_set_basic_block arg count");
EmitInt8(0); EOL("DW_LNS_const_add_pc arg count");
EmitInt8(1); EOL("DW_LNS_fixed_advance_pc arg count");
const UniqueVector<std::string> &Directories = DebugInfo->getDirectories();
const UniqueVector<SourceFileInfo> &SourceFiles = DebugInfo->getSourceFiles();
// Emit directories.
for (unsigned DirectoryID = 1, NDID = Directories.size();
DirectoryID <= NDID; ++DirectoryID) {
EmitString(Directories[DirectoryID]); EOL("Directory");
}
EmitInt8(0); EOL("End of directories");
// Emit files.
for (unsigned SourceID = 1, NSID = SourceFiles.size();
SourceID <= NSID; ++SourceID) {
const SourceFileInfo &SourceFile = SourceFiles[SourceID];
EmitString(SourceFile.getName()); EOL("Source");
EmitULEB128Bytes(SourceFile.getDirectoryID()); EOL("Directory #");
EmitULEB128Bytes(0); EOL("Mod date");
EmitULEB128Bytes(0); EOL("File size");
}
EmitInt8(0); EOL("End of files");
EmitLabel("line_prolog_end", 0);
// Emit line information
const std::vector<SourceLineInfo *> &LineInfos = DebugInfo->getSourceLines();
// Dwarf assumes we start with first line of first source file.
unsigned Source = 1;
unsigned Line = 1;
// Construct rows of the address, source, line, column matrix.
for (unsigned i = 0, N = LineInfos.size(); i < N; ++i) {
SourceLineInfo *LineInfo = LineInfos[i];
if (DwarfVerbose) {
unsigned SourceID = LineInfo->getSourceID();
const SourceFileInfo &SourceFile = SourceFiles[SourceID];
unsigned DirectoryID = SourceFile.getDirectoryID();
O << "\t"
<< Asm->CommentString << " "
<< Directories[DirectoryID]
<< SourceFile.getName() << ":"
<< LineInfo->getLine() << "\n";
}
// Define the line address.
EmitInt8(0); EOL("Extended Op");
EmitInt8(4 + 1); EOL("Op size");
EmitInt8(DW_LNE_set_address); EOL("DW_LNE_set_address");
EmitReference("loc", i + 1); EOL("Location label");
// If change of source, then switch to the new source.
if (Source != LineInfo->getSourceID()) {
Source = LineInfo->getSourceID();
EmitInt8(DW_LNS_set_file); EOL("DW_LNS_set_file");
EmitULEB128Bytes(0); EOL("New Source");
}
// If change of line.
if (Line != LineInfo->getLine()) {
// Determine offset.
int Offset = LineInfo->getLine() - Line;
int Delta = Offset - MinLineDelta;
// Update line.
Line = LineInfo->getLine();
// If delta is small enough and in range...
if (Delta >= 0 && Delta < (MaxLineDelta - 1)) {
// ... then use fast opcode.
EmitInt8(Delta - MinLineDelta); EOL("Line Delta");
} else {
// ... otherwise use long hand.
EmitInt8(DW_LNS_advance_line); EOL("DW_LNS_advance_line");
EmitSLEB128Bytes(Offset); EOL("Line Offset");
EmitInt8(DW_LNS_copy); EOL("DW_LNS_copy");
}
} else {
// Copy the previous row (different address or source)
EmitInt8(DW_LNS_copy); EOL("DW_LNS_copy");
}
}
// Define last address.
EmitInt8(0); EOL("Extended Op");
EmitInt8(4 + 1); EOL("Op size");
EmitInt8(DW_LNE_set_address); EOL("DW_LNE_set_address");
EmitReference("text_end", 0); EOL("Location label");
// Mark end of matrix.
EmitInt8(0); EOL("DW_LNE_end_sequence");
EmitULEB128Bytes(1); O << "\n";
EmitInt8(1); O << "\n";
EmitLabel("line_end", 0);
}
/// EmitDebugFrame - Emit visible names into a debug frame section.
///
void DwarfWriter::EmitDebugFrame() {
// FIXME - Should be per frame
}
/// EmitDebugPubNames - Emit visible names into a debug pubnames section.
///
void DwarfWriter::EmitDebugPubNames() {
// Check to see if it is worth the effort.
if (!GlobalEntities.empty()) {
// Start the dwarf pubnames section.
Asm->SwitchSection(DwarfPubNamesSection, 0);
EmitDifference("pubnames_end", 0, "pubnames_begin", 0);
EOL("Length of Public Names Info");
EmitLabel("pubnames_begin", 0);
EmitInt16(DWARF_VERSION); EOL("DWARF Version");
EmitReference("info_begin", 0); EOL("Offset of Compilation Unit Info");
EmitDifference("info_end", 0, "info_begin", 0);
EOL("Compilation Unit Length");
for (std::map<std::string, DIE *>::iterator GI = GlobalEntities.begin(),
GE = GlobalEntities.end();
GI != GE; ++GI) {
const std::string &Name = GI->first;
DIE * Entity = GI->second;
EmitInt32(Entity->getOffset()); EOL("DIE offset");
EmitString(Name); EOL("External Name");
}
EmitInt32(0); EOL("End Mark");
EmitLabel("pubnames_end", 0);
}
}
/// EmitDebugPubTypes - Emit visible names into a debug pubtypes section.
///
void DwarfWriter::EmitDebugPubTypes() {
// Check to see if it is worth the effort.
if (!GlobalTypes.empty()) {
// Start the dwarf pubtypes section.
Asm->SwitchSection(DwarfPubTypesSection, 0);
}
}
/// EmitDebugStr - Emit visible names into a debug str section.
///
void DwarfWriter::EmitDebugStr() {
// Check to see if it is worth the effort.
if (!StringPool.empty()) {
// Start the dwarf str section.
Asm->SwitchSection(DwarfStrSection, 0);
// For each of strings in teh string pool.
for (unsigned StringID = 1, N = StringPool.size();
StringID <= N; ++StringID) {
// Emit a label for reference from debug information entries.
EmitLabel("string", StringID);
// Emit the string itself.
const std::string &String = StringPool[StringID];
EmitString(String); O << "\n";
}
}
}
/// EmitDebugLoc - Emit visible names into a debug loc section.
///
void DwarfWriter::EmitDebugLoc() {
// Start the dwarf loc section.
Asm->SwitchSection(DwarfLocSection, 0);
}
/// EmitDebugARanges - Emit visible names into a debug aranges section.
///
void DwarfWriter::EmitDebugARanges() {
// Start the dwarf aranges section.
Asm->SwitchSection(DwarfARangesSection, 0);
// FIXME - Mock up
// Don't include size of length
EmitInt32(0x1c); EOL("Length of Address Ranges Info");
EmitInt16(DWARF_VERSION); EOL("Dwarf Version");
EmitReference("info_begin", 0); EOL("Offset of Compilation Unit Info");
EmitInt8(AddressSize); EOL("Size of Address");
EmitInt8(0); EOL("Size of Segment Descriptor");
EmitInt16(0); EOL("Pad (1)");
EmitInt16(0); EOL("Pad (2)");
// Range 1
EmitReference("text_begin", 0); EOL("Address");
EmitDifference("text_end", 0, "text_begin", 0); EOL("Length");
EmitInt32(0); EOL("EOM (1)");
EmitInt32(0); EOL("EOM (2)");
}
/// EmitDebugRanges - Emit visible names into a debug ranges section.
///
void DwarfWriter::EmitDebugRanges() {
// Start the dwarf ranges section.
Asm->SwitchSection(DwarfRangesSection, 0);
}
/// EmitDebugMacInfo - Emit visible names into a debug macinfo section.
///
void DwarfWriter::EmitDebugMacInfo() {
// Start the dwarf macinfo section.
Asm->SwitchSection(DwarfMacInfoSection, 0);
}
/// ConstructCompileUnitDIEs - Create a compile unit DIE for each source and
/// header file.
void DwarfWriter::ConstructCompileUnitDIEs() {
const UniqueVector<CompileUnitDesc *> CUW = DebugInfo->getCompileUnits();
for (unsigned i = 1, N = CUW.size(); i <= N; ++i) {
DIE *Unit = NewCompileUnit(CUW[i]);
CompileUnits.push_back(Unit);
}
}
/// ConstructGlobalDIEs - Create DIEs for each of the externally visible global
/// variables.
void DwarfWriter::ConstructGlobalDIEs(Module &M) {
std::vector<GlobalVariableDesc *> GlobalVariables =
DebugInfo->getAnchoredDescriptors<GlobalVariableDesc>(M);
for (unsigned i = 0, N = GlobalVariables.size(); i < N; ++i) {
GlobalVariableDesc *GVD = GlobalVariables[i];
NewGlobalVariable(GVD);
}
}
/// ConstructSubprogramDIEs - Create DIEs for each of the externally visible
/// subprograms.
void DwarfWriter::ConstructSubprogramDIEs(Module &M) {
std::vector<SubprogramDesc *> Subprograms =
DebugInfo->getAnchoredDescriptors<SubprogramDesc>(M);
for (unsigned i = 0, N = Subprograms.size(); i < N; ++i) {
SubprogramDesc *SPD = Subprograms[i];
NewSubprogram(SPD);
}
}
/// ShouldEmitDwarf - Determine if Dwarf declarations should be made.
///
bool DwarfWriter::ShouldEmitDwarf() {
// Check if debug info is present.
if (!DebugInfo || !DebugInfo->hasInfo()) return false;
// Make sure initial declarations are made.
if (!didInitial) {
EmitInitial();
didInitial = true;
}
// Okay to emit.
return true;
}
//===----------------------------------------------------------------------===//
// Main entry points.
//
DwarfWriter::DwarfWriter(std::ostream &OS, AsmPrinter *A)
: O(OS)
, Asm(A)
, DebugInfo(NULL)
, didInitial(false)
, CompileUnits()
, Abbreviations()
, GlobalTypes()
, GlobalEntities()
, StringPool()
, DescToDieMap()
, TypeToDieMap()
, AddressSize(sizeof(int32_t))
, hasLEB128(false)
, hasDotLoc(false)
, hasDotFile(false)
, needsSet(false)
, DwarfAbbrevSection(".debug_abbrev")
, DwarfInfoSection(".debug_info")
, DwarfLineSection(".debug_line")
, DwarfFrameSection(".debug_frame")
, DwarfPubNamesSection(".debug_pubnames")
, DwarfPubTypesSection(".debug_pubtypes")
, DwarfStrSection(".debug_str")
, DwarfLocSection(".debug_loc")
, DwarfARangesSection(".debug_aranges")
, DwarfRangesSection(".debug_ranges")
, DwarfMacInfoSection(".debug_macinfo")
, TextSection(".text")
, DataSection(".data")
{}
DwarfWriter::~DwarfWriter() {
for (unsigned i = 0, N = CompileUnits.size(); i < N; ++i) {
delete CompileUnits[i];
}
}
/// BeginModule - Emit all Dwarf sections that should come prior to the content.
///
void DwarfWriter::BeginModule(Module &M) {
if (!ShouldEmitDwarf()) return;
EOL("Dwarf Begin Module");
}
/// EndModule - Emit all Dwarf sections that should come after the content.
///
void DwarfWriter::EndModule(Module &M) {
if (!ShouldEmitDwarf()) return;
EOL("Dwarf End Module");
// Standard sections final addresses.
Asm->SwitchSection(TextSection, 0);
EmitLabel("text_end", 0);
Asm->SwitchSection(DataSection, 0);
EmitLabel("data_end", 0);
// Create all the compile unit DIEs.
ConstructCompileUnitDIEs();
// Create DIEs for each of the externally visible global variables.
ConstructGlobalDIEs(M);
// Create DIEs for each of the externally visible subprograms.
ConstructSubprogramDIEs(M);
// Compute DIE offsets and sizes.
SizeAndOffsets();
// Emit all the DIEs into a debug info section
EmitDebugInfo();
// Corresponding abbreviations into a abbrev section.
EmitAbbreviations();
// Emit source line correspondence into a debug line section.
EmitDebugLines();
// Emit info into a debug frame section.
EmitDebugFrame();
// Emit info into a debug pubnames section.
EmitDebugPubNames();
// Emit info into a debug pubtypes section.
EmitDebugPubTypes();
// Emit info into a debug str section.
EmitDebugStr();
// Emit info into a debug loc section.
EmitDebugLoc();
// Emit info into a debug aranges section.
EmitDebugARanges();
// Emit info into a debug ranges section.
EmitDebugRanges();
// Emit info into a debug macinfo section.
EmitDebugMacInfo();
}
/// BeginFunction - Gather pre-function debug information.
///
void DwarfWriter::BeginFunction(MachineFunction &MF) {
if (!ShouldEmitDwarf()) return;
EOL("Dwarf Begin Function");
}
/// EndFunction - Gather and emit post-function debug information.
///
void DwarfWriter::EndFunction(MachineFunction &MF) {
if (!ShouldEmitDwarf()) return;
EOL("Dwarf End Function");
}
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