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|
-- Mcode back-end for ortho - Dwarf generator.
-- Copyright (C) 2006 Tristan Gingold
--
-- This program is free software: you can redistribute it and/or modify
-- it under the terms of the GNU General Public License as published by
-- the Free Software Foundation, either version 2 of the License, or
-- (at your option) any later version.
--
-- This program is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU General Public License for more details.
--
-- You should have received a copy of the GNU General Public License
-- along with this program. If not, see <gnu.org/licenses>.
with Ada.Text_IO;
with GNAT.Directory_Operations;
with Tables;
with Dwarf; use Dwarf;
with Ortho_Code.Flags; use Ortho_Code.Flags;
with Ortho_Code.Decls;
with Ortho_Code.Types;
with Ortho_Code.Consts;
with Ortho_Ident;
with Ortho_Code.Binary;
package body Ortho_Code.Dwarf is
-- Dwarf debugging format.
-- Debugging.
Line1_Sect : Section_Acc := null;
Line_Last : Int32 := 0;
Line_Pc : Pc_Type := 0;
-- Constant.
Min_Insn_Len : constant := 1;
Line_Base : constant := 1;
Line_Range : constant := 4;
Line_Opcode_Base : constant := 13;
Line_Max_Addr : constant := (255 - Line_Opcode_Base) / Line_Range;
-- + Line_Base;
Cur_File : Natural := 0;
Last_File : Natural := 0;
Orig_Sym : Symbol;
End_Sym : Symbol;
Abbrev_Sym : Symbol;
Info_Sym : Symbol;
Line_Sym : Symbol;
Abbrev_Last : Unsigned_32;
procedure Gen_String_Nul (Str : String)
is
begin
Prealloc (Str'Length + 1);
for I in Str'Range loop
Gen_8 (Character'Pos (Str (I)));
end loop;
Gen_8 (0);
end Gen_String_Nul;
procedure Gen_Sleb128 (V : Int32)
is
V1 : Uns32 := To_Uns32 (V);
V2 : Uns32;
B : Byte;
function Shift_Right_Arithmetic (Value : Uns32; Amount : Natural)
return Uns32;
pragma Import (Intrinsic, Shift_Right_Arithmetic);
begin
loop
B := Byte (V1 and 16#7F#);
V2 := Shift_Right_Arithmetic (V1, 7);
if (V2 = 0 and (B and 16#40#) = 0)
or (V2 = -1 and (B and 16#40#) /= 0)
then
Gen_8 (B);
exit;
else
Gen_8 (B or 16#80#);
V1 := V2;
end if;
end loop;
end Gen_Sleb128;
procedure Gen_Uleb128 (V : Unsigned_32)
is
V1 : Unsigned_32 := V;
B : Byte;
begin
loop
B := Byte (V1 and 16#7f#);
V1 := Shift_Right (V1, 7);
if V1 /= 0 then
Gen_8 (B or 16#80#);
else
Gen_8 (B);
exit;
end if;
end loop;
end Gen_Uleb128;
procedure Set_Line_Stmt (Line : Int32)
is
Pc : Pc_Type;
D_Pc : Pc_Type;
D_Ln : Int32;
begin
if Line = Line_Last then
return;
end if;
Pc := Get_Current_Pc;
D_Pc := (Pc - Line_Pc) / Min_Insn_Len;
D_Ln := Line - Line_Last;
-- Always emit line information, since missing info can distrub the
-- user.
-- As an optimization, we could try to emit the highest line for the
-- same PC, since GDB seems to handle this way.
if False and D_Pc = 0 then
return;
end if;
Set_Current_Section (Line1_Sect);
Prealloc (32);
if Cur_File /= Last_File then
Gen_8 (Byte (DW_LNS_Set_File));
Gen_Uleb128 (Unsigned_32 (Cur_File));
Last_File := Cur_File;
elsif Cur_File = 0 then
-- No file yet.
return;
end if;
if D_Ln < Line_Base or D_Ln >= (Line_Base + Line_Range) then
-- Emit an advance line.
Gen_8 (Byte (DW_LNS_Advance_Line));
Gen_Sleb128 (Int32 (D_Ln - Line_Base));
D_Ln := Line_Base;
end if;
if D_Pc >= Line_Max_Addr then
-- Emit an advance addr.
Gen_8 (Byte (DW_LNS_Advance_Pc));
Gen_Uleb128 (Unsigned_32 (D_Pc));
D_Pc := 0;
end if;
Gen_8 (Line_Opcode_Base
+ Byte (D_Pc) * Line_Range
+ Byte (D_Ln - Line_Base));
Line_Pc := Pc;
Line_Last := Line;
end Set_Line_Stmt;
type String_Acc is access constant String;
type Dir_Chain;
type Dir_Chain_Acc is access Dir_Chain;
type Dir_Chain is record
Name : String_Acc;
Next : Dir_Chain_Acc;
end record;
type File_Chain;
type File_Chain_Acc is access File_Chain;
type File_Chain is record
Name : String_Acc;
Dir : Natural;
Next : File_Chain_Acc;
end record;
Dirs : Dir_Chain_Acc := null;
Files : File_Chain_Acc := null;
procedure Set_Filename (Dir : String; File : String)
is
D : Natural;
F : Natural;
D_C : Dir_Chain_Acc;
F_C : File_Chain_Acc;
begin
-- Find directory.
if Dir = "" then
-- Current directory.
D := 0;
elsif Dirs = null then
-- First directory.
Dirs := new Dir_Chain'(Name => new String'(Dir),
Next => null);
D := 1;
else
-- Find a directory.
D_C := Dirs;
D := 1;
loop
exit when D_C.Name.all = Dir;
D := D + 1;
if D_C.Next = null then
D_C.Next := new Dir_Chain'(Name => new String'(Dir),
Next => null);
exit;
else
D_C := D_C.Next;
end if;
end loop;
end if;
-- Find file.
F := 1;
if Files = null then
-- first file.
Files := new File_Chain'(Name => new String'(File),
Dir => D,
Next => null);
else
F_C := Files;
loop
exit when F_C.Name.all = File and F_C.Dir = D;
F := F + 1;
if F_C.Next = null then
F_C.Next := new File_Chain'(Name => new String'(File),
Dir => D,
Next => null);
exit;
else
F_C := F_C.Next;
end if;
end loop;
end if;
Cur_File := F;
end Set_Filename;
procedure Gen_Abbrev_Header (Tag : Unsigned_32; Child : Byte) is
begin
Gen_Uleb128 (Tag);
Gen_8 (Child);
end Gen_Abbrev_Header;
procedure Gen_Abbrev_Tuple (Attr : Unsigned_32; Form : Unsigned_32) is
begin
Gen_Uleb128 (Attr);
Gen_Uleb128 (Form);
end Gen_Abbrev_Tuple;
procedure Init is
begin
-- Generate type names.
Flags.Flag_Type_Name := True;
Orig_Sym := Create_Local_Symbol;
Set_Symbol_Pc (Orig_Sym, False);
End_Sym := Create_Local_Symbol;
Create_Section (Line1_Sect, ".debug_line-1", Section_Debug);
Set_Current_Section (Line1_Sect);
-- Write Address.
Gen_8 (0); -- extended opcode
Gen_8 (1 + Pc_Type_Sizeof); -- length
Gen_8 (Byte (DW_LNE_Set_Address));
Gen_Ua_Addr (Orig_Sym, 0);
Line_Last := 1;
Create_Section (Line_Sect, ".debug_line", Section_Debug);
Set_Section_Info (Line_Sect, null, 0, 0);
Set_Current_Section (Line_Sect);
Line_Sym := Create_Local_Symbol;
Set_Symbol_Pc (Line_Sym, False);
-- Abbrevs.
Create_Section (Abbrev_Sect, ".debug_abbrev", Section_Debug);
Set_Section_Info (Abbrev_Sect, null, 0, 0);
Set_Current_Section (Abbrev_Sect);
Abbrev_Sym := Create_Local_Symbol;
Set_Symbol_Pc (Abbrev_Sym, False);
Gen_Uleb128 (1);
Gen_Abbrev_Header (DW_TAG_Compile_Unit, DW_CHILDREN_Yes);
Gen_Abbrev_Tuple (DW_AT_Stmt_List, DW_FORM_Data4);
Gen_Abbrev_Tuple (DW_AT_Low_Pc, DW_FORM_Addr);
Gen_Abbrev_Tuple (DW_AT_High_Pc, DW_FORM_Addr);
Gen_Abbrev_Tuple (DW_AT_Producer, DW_FORM_String);
Gen_Abbrev_Tuple (DW_AT_Comp_Dir, DW_FORM_String);
Gen_Abbrev_Tuple (0, 0);
Abbrev_Last := 1;
-- Info.
Create_Section (Info_Sect, ".debug_info", Section_Debug);
Set_Section_Info (Info_Sect, null, 0, 0);
Set_Current_Section (Info_Sect);
Info_Sym := Create_Local_Symbol;
Set_Symbol_Pc (Info_Sym, False);
Gen_32 (7); -- Length: to be patched.
Gen_16 (2); -- version
Gen_Ua_32 (Abbrev_Sym); -- Abbrev offset
Gen_8 (Pc_Type_Sizeof); -- Ptr size.
-- Compile_unit.
Gen_Uleb128 (1);
Gen_Ua_32 (Line_Sym);
Gen_Ua_Addr (Orig_Sym, 0);
Gen_Ua_Addr (End_Sym, 0);
Gen_String_Nul ("T.Gingold ortho_mcode (2004)");
Gen_String_Nul (GNAT.Directory_Operations.Get_Current_Dir);
end Init;
procedure Emit_Decl (Decl : O_Dnode);
-- Next node to be emitted.
Last_Decl : O_Dnode := O_Dnode_First;
procedure Emit_Decls_Until (Last : O_Dnode)
is
use Ortho_Code.Decls;
begin
while Last_Decl < Last loop
Emit_Decl (Last_Decl);
Last_Decl := Get_Decl_Chain (Last_Decl);
end loop;
end Emit_Decls_Until;
procedure Finish
is
Length : Pc_Type;
Last : O_Dnode;
begin
Set_Symbol_Pc (End_Sym, False);
Length := Get_Current_Pc;
Last := Decls.Get_Decl_Last;
Emit_Decls_Until (Last);
if Last_Decl <= Last then
Emit_Decl (Last);
end if;
-- Finish abbrevs.
Set_Current_Section (Abbrev_Sect);
Gen_Uleb128 (0);
-- Emit header.
Set_Current_Section (Line_Sect);
Prealloc (32);
-- Unit_Length (to be patched).
Gen_32 (0);
-- version
Gen_16 (2);
-- header_length (to be patched).
Gen_32 (5 + 12 + 1);
-- minimum_instruction_length.
Gen_8 (Min_Insn_Len);
-- default_is_stmt
Gen_8 (1);
-- line base
Gen_8 (Line_Base);
-- line range
Gen_8 (Line_Range);
-- opcode base
Gen_8 (Line_Opcode_Base);
-- standard_opcode_length.
Gen_8 (0); -- copy
Gen_8 (1); -- advance pc
Gen_8 (1); -- advance line
Gen_8 (1); -- set file
Gen_8 (1); -- set column
Gen_8 (0); -- negate stmt
Gen_8 (0); -- set basic block
Gen_8 (0); -- const add pc
Gen_8 (1); -- fixed advance pc
Gen_8 (0); -- set prologue end
Gen_8 (0); -- set epilogue begin
Gen_8 (1); -- set isa
--if Line_Opcode_Base /= 13 then
-- raise Program_Error;
--end if;
-- include directories
declare
D : Dir_Chain_Acc;
begin
D := Dirs;
while D /= null loop
Gen_String_Nul (D.Name.all);
D := D.Next;
end loop;
Prealloc (1);
Gen_8 (0); -- last entry.
end;
-- file_names.
declare
F : File_Chain_Acc;
begin
F := Files;
while F /= null loop
Gen_String_Nul (F.Name.all);
Prealloc (8);
Gen_Uleb128 (Unsigned_32 (F.Dir));
Gen_8 (0); -- time
Gen_8 (0); -- length
F := F.Next;
end loop;
Gen_8 (0); -- last entry.
end;
-- Set prolog length
Patch_32 (6, Unsigned_32 (Get_Current_Pc - 6));
Merge_Section (Line_Sect, Line1_Sect);
Prealloc (4);
-- Emit end of sequence.
Gen_8 (0); -- extended opcode
Gen_8 (1); -- length: 1
Gen_8 (Byte (DW_LNE_End_Sequence));
-- Set total length.
Patch_32 (0, Unsigned_32 (Get_Current_Pc - 4));
-- Info.
Set_Current_Section (Info_Sect);
Prealloc (8);
-- Finish child.
Gen_Uleb128 (0);
-- Set total length.
Patch_32 (0, Unsigned_32 (Get_Current_Pc - 4));
-- Aranges
Create_Section (Aranges_Sect, ".debug_aranges", Section_Debug);
Set_Section_Info (Aranges_Sect, null, 0, 0);
Set_Current_Section (Aranges_Sect);
Prealloc (32);
Gen_32 (24 + Pc_Type_Sizeof); -- Length.
Gen_16 (2); -- version
Gen_Ua_32 (Info_Sym); -- info offset
Gen_8 (Pc_Type_Sizeof); -- Ptr size.
Gen_8 (0); -- seg desc size.
Gen_32 (0); -- pad
Gen_Ua_Addr (Orig_Sym, 0); -- text offset
Gen_32 (Unsigned_32 (Length));
Gen_32 (0); -- End
Gen_32 (0);
end Finish;
procedure Generate_Abbrev (Abbrev : out Unsigned_32) is
begin
Abbrev_Last := Abbrev_Last + 1;
Abbrev := Abbrev_Last;
Set_Current_Section (Abbrev_Sect);
-- FIXME: should be enough ?
Prealloc (128);
Gen_Uleb128 (Abbrev);
end Generate_Abbrev;
procedure Gen_Info_Header (Abbrev : Unsigned_32) is
begin
Set_Current_Section (Info_Sect);
Gen_Uleb128 (Abbrev);
end Gen_Info_Header;
function Gen_Info_Sibling return Pc_Type
is
Pc : Pc_Type;
begin
Pc := Get_Current_Pc;
Gen_32 (0);
return Pc;
end Gen_Info_Sibling;
procedure Patch_Info_Sibling (Pc : Pc_Type) is
begin
Patch_32 (Pc, Unsigned_32 (Get_Current_Pc));
end Patch_Info_Sibling;
Abbrev_Base_Type : Unsigned_32 := 0;
Abbrev_Base_Type_Name : Unsigned_32 := 0;
Abbrev_Pointer : Unsigned_32 := 0;
Abbrev_Pointer_Name : Unsigned_32 := 0;
Abbrev_Uncomplete_Pointer : Unsigned_32 := 0;
Abbrev_Uncomplete_Pointer_Name : Unsigned_32 := 0;
Abbrev_Ucarray : Unsigned_32 := 0;
Abbrev_Ucarray_Name : Unsigned_32 := 0;
Abbrev_Uc_Subrange : Unsigned_32 := 0;
Abbrev_Subarray : Unsigned_32 := 0;
Abbrev_Subarray_Name : Unsigned_32 := 0;
Abbrev_Subrange : Unsigned_32 := 0;
Abbrev_Struct : Unsigned_32 := 0;
Abbrev_Struct_Name : Unsigned_32 := 0;
Abbrev_Union : Unsigned_32 := 0;
Abbrev_Union_Name : Unsigned_32 := 0;
Abbrev_Member : Unsigned_32 := 0;
Abbrev_Enum : Unsigned_32 := 0;
Abbrev_Enum_Name : Unsigned_32 := 0;
Abbrev_Enumerator : Unsigned_32 := 0;
package TOnodes is new Tables
(Table_Component_Type => Pc_Type,
Table_Index_Type => O_Tnode,
Table_Low_Bound => O_Tnode_First,
Table_Initial => 16);
procedure Emit_Type_Ref (Atype : O_Tnode)
is
Off : Pc_Type;
begin
pragma Assert (Flag_Debug >= Debug_Dwarf);
Off := TOnodes.Table (Atype);
pragma Assert (Off /= Null_Pc);
Gen_32 (Unsigned_32 (Off));
end Emit_Type_Ref;
procedure Emit_Ident (Id : O_Ident)
is
use Ortho_Ident;
L : Natural;
begin
L := Get_String_Length (Id);
Prealloc (Pc_Type (L) + 128);
Gen_String_Nul (Get_String (Id));
end Emit_Ident;
procedure Add_Type_Ref (Atype : O_Tnode; Pc : Pc_Type)
is
Prev : O_Tnode;
begin
if Atype > TOnodes.Last then
-- Expand.
Prev := TOnodes.Last;
TOnodes.Set_Last (Atype);
TOnodes.Table (Prev + 1 .. Atype - 1) := (others => Null_Pc);
end if;
TOnodes.Table (Atype) := Pc;
end Add_Type_Ref;
procedure Emit_Decl_Ident (Decl : O_Dnode)
is
use Ortho_Code.Decls;
begin
Emit_Ident (Get_Decl_Ident (Decl));
end Emit_Decl_Ident;
procedure Emit_Decl_Ident_If_Set (Decl : O_Dnode)
is
use Ortho_Code.Decls;
begin
if Decl /= O_Dnode_Null then
Emit_Ident (Get_Decl_Ident (Decl));
end if;
end Emit_Decl_Ident_If_Set;
procedure Emit_Type (Atype : O_Tnode);
procedure Emit_Base_Type (Atype : O_Tnode; Decl : O_Dnode)
is
use Ortho_Code.Types;
procedure Finish_Gen_Abbrev is
begin
Gen_Abbrev_Tuple (DW_AT_Encoding, DW_FORM_Data1);
Gen_Abbrev_Tuple (DW_AT_Byte_Size, DW_FORM_Data1);
Gen_Abbrev_Tuple (0, 0);
end Finish_Gen_Abbrev;
begin
if Decl = O_Dnode_Null then
if Abbrev_Base_Type = 0 then
Generate_Abbrev (Abbrev_Base_Type);
Gen_Abbrev_Header (DW_TAG_Base_Type, DW_CHILDREN_No);
Finish_Gen_Abbrev;
end if;
Gen_Info_Header (Abbrev_Base_Type);
else
if Abbrev_Base_Type_Name = 0 then
Generate_Abbrev (Abbrev_Base_Type_Name);
Gen_Abbrev_Header (DW_TAG_Base_Type, DW_CHILDREN_No);
Gen_Abbrev_Tuple (DW_AT_Name, DW_FORM_String);
Finish_Gen_Abbrev;
end if;
Gen_Info_Header (Abbrev_Base_Type_Name);
Emit_Decl_Ident (Decl);
end if;
case Get_Type_Kind (Atype) is
when OT_Signed =>
Gen_8 (DW_ATE_Signed);
when OT_Unsigned =>
Gen_8 (DW_ATE_Unsigned);
when OT_Float =>
Gen_8 (DW_ATE_Float);
when others =>
raise Program_Error;
end case;
Gen_8 (Byte (Get_Type_Size (Atype)));
end Emit_Base_Type;
procedure Emit_Access_Type (Atype : O_Tnode; Decl : O_Dnode)
is
use Ortho_Code.Types;
procedure Finish_Gen_Abbrev is
begin
Gen_Abbrev_Tuple (DW_AT_Byte_Size, DW_FORM_Data1);
Gen_Abbrev_Tuple (DW_AT_Type, DW_FORM_Ref4);
Gen_Abbrev_Tuple (0, 0);
end Finish_Gen_Abbrev;
procedure Finish_Gen_Abbrev_Uncomplete is
begin
Gen_Abbrev_Tuple (DW_AT_Byte_Size, DW_FORM_Data1);
Gen_Abbrev_Tuple (0, 0);
end Finish_Gen_Abbrev_Uncomplete;
Dtype : O_Tnode;
D_Pc : Pc_Type;
begin
Dtype := Get_Type_Access_Type (Atype);
if Dtype = O_Tnode_Null then
if Decl = O_Dnode_Null then
if Abbrev_Uncomplete_Pointer = 0 then
Generate_Abbrev (Abbrev_Uncomplete_Pointer);
Gen_Abbrev_Header (DW_TAG_Pointer_Type, DW_CHILDREN_No);
Finish_Gen_Abbrev_Uncomplete;
end if;
Gen_Info_Header (Abbrev_Uncomplete_Pointer);
else
if Abbrev_Uncomplete_Pointer_Name = 0 then
Generate_Abbrev (Abbrev_Uncomplete_Pointer_Name);
Gen_Abbrev_Header (DW_TAG_Pointer_Type, DW_CHILDREN_No);
Gen_Abbrev_Tuple (DW_AT_Name, DW_FORM_String);
Finish_Gen_Abbrev_Uncomplete;
end if;
Gen_Info_Header (Abbrev_Uncomplete_Pointer_Name);
Emit_Decl_Ident (Decl);
end if;
Gen_8 (Byte (Get_Type_Size (Atype)));
else
if Decl = O_Dnode_Null then
if Abbrev_Pointer = 0 then
Generate_Abbrev (Abbrev_Pointer);
Gen_Abbrev_Header (DW_TAG_Pointer_Type, DW_CHILDREN_No);
Finish_Gen_Abbrev;
end if;
Gen_Info_Header (Abbrev_Pointer);
else
if Abbrev_Pointer_Name = 0 then
Generate_Abbrev (Abbrev_Pointer_Name);
Gen_Abbrev_Header (DW_TAG_Pointer_Type, DW_CHILDREN_No);
Gen_Abbrev_Tuple (DW_AT_Name, DW_FORM_String);
Finish_Gen_Abbrev;
end if;
Gen_Info_Header (Abbrev_Pointer_Name);
Emit_Decl_Ident (Decl);
end if;
Gen_8 (Byte (Get_Type_Size (Atype)));
-- Break possible loops: generate the access entry...
D_Pc := Get_Current_Pc;
Gen_32 (0);
-- ... generate the designated type ...
Emit_Type (Dtype);
-- ... and write its reference.
Patch_32 (D_Pc, Unsigned_32 (TOnodes.Table (Dtype)));
end if;
end Emit_Access_Type;
procedure Emit_Array_Type
(Decl : O_Dnode; El_Type : O_Tnode; Idx_Type : O_Tnode)
is
procedure Finish_Gen_Abbrev is
begin
Gen_Abbrev_Tuple (DW_AT_Type, DW_FORM_Ref4);
Gen_Abbrev_Tuple (0, 0);
end Finish_Gen_Abbrev;
begin
if Decl = O_Dnode_Null then
if Abbrev_Ucarray = 0 then
Generate_Abbrev (Abbrev_Ucarray);
Gen_Abbrev_Header (DW_TAG_Array_Type, DW_CHILDREN_Yes);
Finish_Gen_Abbrev;
end if;
Gen_Info_Header (Abbrev_Ucarray);
else
if Abbrev_Ucarray_Name = 0 then
Generate_Abbrev (Abbrev_Ucarray_Name);
Gen_Abbrev_Header (DW_TAG_Array_Type, DW_CHILDREN_Yes);
Gen_Abbrev_Tuple (DW_AT_Name, DW_FORM_String);
Finish_Gen_Abbrev;
end if;
Gen_Info_Header (Abbrev_Ucarray_Name);
Emit_Decl_Ident (Decl);
end if;
Emit_Type_Ref (El_Type);
if Abbrev_Uc_Subrange = 0 then
Generate_Abbrev (Abbrev_Uc_Subrange);
Gen_Abbrev_Header (DW_TAG_Subrange_Type, DW_CHILDREN_No);
Gen_Abbrev_Tuple (DW_AT_Type, DW_FORM_Ref4);
Gen_Abbrev_Tuple (0, 0);
end if;
Gen_Info_Header (Abbrev_Uc_Subrange);
Emit_Type_Ref (Idx_Type);
Gen_Uleb128 (0);
end Emit_Array_Type;
procedure Emit_Ucarray_Type (Atype : O_Tnode; Decl : O_Dnode)
is
use Ortho_Code.Types;
begin
Emit_Array_Type (Decl,
Get_Type_Ucarray_Element (Atype),
Get_Type_Ucarray_Index (Atype));
end Emit_Ucarray_Type;
procedure Emit_Subarray_Type (Atype : O_Tnode; Decl : O_Dnode)
is
use Ortho_Code.Types;
procedure Finish_Gen_Abbrev is
begin
Gen_Abbrev_Tuple (DW_AT_Type, DW_FORM_Ref4);
Gen_Abbrev_Tuple (DW_AT_Byte_Size, DW_FORM_Udata);
Gen_Abbrev_Tuple (0, 0);
end Finish_Gen_Abbrev;
Base : O_Tnode;
begin
if Decl = O_Dnode_Null then
if Abbrev_Subarray = 0 then
Generate_Abbrev (Abbrev_Subarray);
Gen_Abbrev_Header (DW_TAG_Array_Type, DW_CHILDREN_Yes);
Finish_Gen_Abbrev;
end if;
Gen_Info_Header (Abbrev_Subarray);
else
if Abbrev_Subarray_Name = 0 then
Generate_Abbrev (Abbrev_Subarray_Name);
Gen_Abbrev_Header (DW_TAG_Array_Type, DW_CHILDREN_Yes);
Gen_Abbrev_Tuple (DW_AT_Name, DW_FORM_String);
Finish_Gen_Abbrev;
end if;
Gen_Info_Header (Abbrev_Subarray_Name);
Emit_Decl_Ident (Decl);
end if;
Emit_Type_Ref (Get_Type_Subarray_Element (Atype));
Gen_Uleb128 (Unsigned_32 (Get_Type_Size (Atype)));
if Abbrev_Subrange = 0 then
Generate_Abbrev (Abbrev_Subrange);
Gen_Abbrev_Header (DW_TAG_Subrange_Type, DW_CHILDREN_No);
Gen_Abbrev_Tuple (DW_AT_Type, DW_FORM_Ref4);
Gen_Abbrev_Tuple (DW_AT_Lower_Bound, DW_FORM_Data1);
Gen_Abbrev_Tuple (DW_AT_Count, DW_FORM_Udata);
Gen_Abbrev_Tuple (0, 0);
end if;
Gen_Info_Header (Abbrev_Subrange);
Base := Get_Type_Subarray_Base (Atype);
Emit_Type_Ref (Get_Type_Ucarray_Index (Base));
Gen_8 (0);
Gen_Uleb128 (Unsigned_32 (Get_Type_Subarray_Length (Atype)));
Gen_Uleb128 (0);
end Emit_Subarray_Type;
procedure Emit_Members (Atype : O_Tnode; Decl : O_Dnode)
is
use Ortho_Code.Types;
Nbr : Uns32;
F : O_Fnode;
Loc_Pc : Pc_Type;
Sibling_Pc : Pc_Type;
Sz : Uns32;
begin
if Abbrev_Member = 0 then
Generate_Abbrev (Abbrev_Member);
Gen_Abbrev_Header (DW_TAG_Member, DW_CHILDREN_No);
Gen_Abbrev_Tuple (DW_AT_Name, DW_FORM_String);
Gen_Abbrev_Tuple (DW_AT_Type, DW_FORM_Ref4);
Gen_Abbrev_Tuple (DW_AT_Data_Member_Location, DW_FORM_Block1);
Gen_Abbrev_Tuple (0, 0);
end if;
Set_Current_Section (Info_Sect);
Sibling_Pc := Gen_Info_Sibling;
Emit_Decl_Ident_If_Set (Decl);
if Get_Type_Sized (Atype) then
Sz := Get_Type_Size (Atype);
else
Sz := Get_Type_Record_Size (Atype);
end if;
Gen_Uleb128 (Unsigned_32 (Sz));
Nbr := Get_Type_Record_Nbr_Fields (Atype);
F := Get_Type_Record_Fields (Atype);
while Nbr > 0 loop
Gen_Uleb128 (Abbrev_Member);
Emit_Ident (Get_Field_Ident (F));
Emit_Type_Ref (Get_Field_Type (F));
-- Location.
Loc_Pc := Get_Current_Pc;
Gen_8 (3);
Gen_8 (DW_OP_Plus_Uconst);
Gen_Uleb128 (Unsigned_32 (Get_Field_Offset (F)));
Patch_8 (Loc_Pc, Unsigned_8 (Get_Current_Pc - (Loc_Pc + 1)));
F := Get_Field_Chain (F);
Nbr := Nbr - 1;
end loop;
-- end of children.
Gen_Uleb128 (0);
Patch_Info_Sibling (Sibling_Pc);
end Emit_Members;
procedure Emit_Record_Type (Atype : O_Tnode; Decl : O_Dnode)
is
procedure Finish_Gen_Abbrev is
begin
Gen_Abbrev_Tuple (DW_AT_Byte_Size, DW_FORM_Udata);
Gen_Abbrev_Tuple (0, 0);
end Finish_Gen_Abbrev;
begin
if Decl = O_Dnode_Null then
if Abbrev_Struct = 0 then
Generate_Abbrev (Abbrev_Struct);
Gen_Abbrev_Header (DW_TAG_Structure_Type, DW_CHILDREN_Yes);
Gen_Abbrev_Tuple (DW_AT_Sibling, DW_FORM_Ref4);
Finish_Gen_Abbrev;
end if;
Gen_Info_Header (Abbrev_Struct);
else
if Abbrev_Struct_Name = 0 then
Generate_Abbrev (Abbrev_Struct_Name);
Gen_Abbrev_Header (DW_TAG_Structure_Type, DW_CHILDREN_Yes);
Gen_Abbrev_Tuple (DW_AT_Sibling, DW_FORM_Ref4);
Gen_Abbrev_Tuple (DW_AT_Name, DW_FORM_String);
Finish_Gen_Abbrev;
end if;
Gen_Info_Header (Abbrev_Struct_Name);
end if;
Emit_Members (Atype, Decl);
end Emit_Record_Type;
procedure Emit_Union_Type (Atype : O_Tnode; Decl : O_Dnode)
is
procedure Finish_Gen_Abbrev is
begin
Gen_Abbrev_Tuple (DW_AT_Byte_Size, DW_FORM_Udata);
Gen_Abbrev_Tuple (0, 0);
end Finish_Gen_Abbrev;
begin
if Decl = O_Dnode_Null then
if Abbrev_Union = 0 then
Generate_Abbrev (Abbrev_Union);
Gen_Abbrev_Header (DW_TAG_Union_Type, DW_CHILDREN_Yes);
Gen_Abbrev_Tuple (DW_AT_Sibling, DW_FORM_Ref4);
Finish_Gen_Abbrev;
end if;
Gen_Info_Header (Abbrev_Union);
else
if Abbrev_Union_Name = 0 then
Generate_Abbrev (Abbrev_Union_Name);
Gen_Abbrev_Header (DW_TAG_Union_Type, DW_CHILDREN_Yes);
Gen_Abbrev_Tuple (DW_AT_Sibling, DW_FORM_Ref4);
Gen_Abbrev_Tuple (DW_AT_Name, DW_FORM_String);
Finish_Gen_Abbrev;
end if;
Gen_Info_Header (Abbrev_Union_Name);
end if;
Emit_Members (Atype, Decl);
end Emit_Union_Type;
procedure Emit_Enum_Type (Atype : O_Tnode; Decl : O_Dnode)
is
use Ortho_Code.Types;
use Ortho_Code.Consts;
procedure Finish_Gen_Abbrev is
begin
Gen_Abbrev_Tuple (DW_AT_Byte_Size, DW_FORM_Data1);
Gen_Abbrev_Tuple (0, 0);
end Finish_Gen_Abbrev;
procedure Emit_Enumerator (L : O_Cnode) is
begin
Gen_Uleb128 (Abbrev_Enumerator);
Emit_Ident (Get_Lit_Ident (L));
Gen_Uleb128 (Unsigned_32 (Get_Lit_Value (L)));
end Emit_Enumerator;
Nbr : Uns32;
L : O_Cnode;
Sibling_Pc : Pc_Type;
begin
if Abbrev_Enumerator = 0 then
Generate_Abbrev (Abbrev_Enumerator);
Gen_Abbrev_Header (DW_TAG_Enumerator, DW_CHILDREN_No);
Gen_Abbrev_Tuple (DW_AT_Name, DW_FORM_String);
Gen_Abbrev_Tuple (DW_AT_Const_Value, DW_FORM_Udata);
Gen_Abbrev_Tuple (0, 0);
end if;
if Decl = O_Dnode_Null then
if Abbrev_Enum = 0 then
Generate_Abbrev (Abbrev_Enum);
Gen_Abbrev_Header (DW_TAG_Enumeration_Type, DW_CHILDREN_Yes);
Gen_Abbrev_Tuple (DW_AT_Sibling, DW_FORM_Ref4);
Finish_Gen_Abbrev;
end if;
Gen_Info_Header (Abbrev_Enum);
else
if Abbrev_Enum_Name = 0 then
Generate_Abbrev (Abbrev_Enum_Name);
Gen_Abbrev_Header (DW_TAG_Enumeration_Type, DW_CHILDREN_Yes);
Gen_Abbrev_Tuple (DW_AT_Sibling, DW_FORM_Ref4);
Gen_Abbrev_Tuple (DW_AT_Name, DW_FORM_String);
Finish_Gen_Abbrev;
end if;
Gen_Info_Header (Abbrev_Enum_Name);
end if;
Sibling_Pc := Gen_Info_Sibling;
Emit_Decl_Ident_If_Set (Decl);
Gen_8 (Byte (Get_Type_Size (Atype)));
case Get_Type_Kind (Atype) is
when OT_Enum =>
Nbr := Get_Type_Enum_Nbr_Lits (Atype);
L := Get_Type_Enum_Lits (Atype);
while Nbr > 0 loop
Emit_Enumerator (L);
L := Get_Lit_Chain (L);
Nbr := Nbr - 1;
end loop;
when OT_Boolean =>
Emit_Enumerator (Get_Type_Bool_False (Atype));
Emit_Enumerator (Get_Type_Bool_True (Atype));
when others =>
raise Program_Error;
end case;
-- End of children.
Gen_Uleb128 (0);
Patch_Info_Sibling (Sibling_Pc);
end Emit_Enum_Type;
procedure Emit_Type (Atype : O_Tnode)
is
use Ortho_Code.Types;
Kind : OT_Kind;
Decl : O_Dnode;
begin
if Flag_Debug < Debug_Dwarf then
return;
end if;
-- If already emitted, then return.
if Atype <= TOnodes.Last
and then TOnodes.Table (Atype) /= Null_Pc
then
return;
end if;
Kind := Get_Type_Kind (Atype);
-- First step: emit inner types (if any).
case Kind is
when OT_Signed
| OT_Unsigned
| OT_Float
| OT_Boolean
| OT_Enum =>
null;
when OT_Access =>
null;
when OT_Ucarray =>
Emit_Type (Get_Type_Ucarray_Index (Atype));
Emit_Type (Get_Type_Ucarray_Element (Atype));
when OT_Subarray =>
Emit_Type (Get_Type_Subarray_Base (Atype));
when OT_Record
| OT_Subrecord
| OT_Union =>
declare
Nbr : Uns32;
F : O_Fnode;
begin
Nbr := Get_Type_Record_Nbr_Fields (Atype);
F := Get_Type_Record_Fields (Atype);
while Nbr > 0 loop
Emit_Type (Get_Field_Type (F));
F := Get_Field_Chain (F);
Nbr := Nbr - 1;
end loop;
end;
when OT_Complete =>
null;
end case;
Set_Current_Section (Info_Sect);
Add_Type_Ref (Atype, Get_Current_Pc);
Decl := Decls.Get_Type_Decl (Atype);
-- Second step: emit info.
case Kind is
when OT_Signed
| OT_Unsigned
| OT_Float =>
Emit_Base_Type (Atype, Decl);
-- base types.
when OT_Access =>
Emit_Access_Type (Atype, Decl);
when OT_Ucarray =>
Emit_Ucarray_Type (Atype, Decl);
when OT_Subarray =>
Emit_Subarray_Type (Atype, Decl);
when OT_Record
| OT_Subrecord =>
Emit_Record_Type (Atype, Decl);
when OT_Union =>
Emit_Union_Type (Atype, Decl);
when OT_Enum
| OT_Boolean =>
Emit_Enum_Type (Atype, Decl);
when OT_Complete =>
null;
end case;
end Emit_Type;
procedure Emit_Decl_Type (Decl : O_Dnode)
is
use Ortho_Code.Decls;
begin
Emit_Type_Ref (Get_Decl_Type (Decl));
end Emit_Decl_Type;
Abbrev_Variable : Unsigned_32 := 0;
Abbrev_Const : Unsigned_32 := 0;
procedure Emit_Local_Location (Decl : O_Dnode)
is
use Ortho_Code.Decls;
Pc : Pc_Type;
begin
Pc := Get_Current_Pc;
Gen_8 (2);
Gen_8 (DW_OP_Fbreg);
Gen_Sleb128 (Get_Decl_Info (Decl));
Patch_8 (Pc, Unsigned_8 (Get_Current_Pc - (Pc + 1)));
end Emit_Local_Location;
procedure Emit_Global_Location (Decl : O_Dnode)
is
use Ortho_Code.Binary;
begin
Gen_8 (1 + Pc_Type_Sizeof);
Gen_8 (DW_OP_Addr);
Gen_Ua_Addr (Get_Decl_Symbol (Decl), 0);
end Emit_Global_Location;
procedure Emit_Variable (Decl : O_Dnode)
is
use Ortho_Code.Decls;
Dtype : O_Tnode;
begin
if Get_Decl_Ident (Decl) = O_Ident_Nul then
return;
end if;
if Abbrev_Variable = 0 then
Generate_Abbrev (Abbrev_Variable);
Gen_Abbrev_Header (DW_TAG_Variable, DW_CHILDREN_No);
Gen_Abbrev_Tuple (DW_AT_Name, DW_FORM_String);
Gen_Abbrev_Tuple (DW_AT_Type, DW_FORM_Ref4);
Gen_Abbrev_Tuple (DW_AT_Location, DW_FORM_Block1);
Gen_Abbrev_Tuple (0, 0);
end if;
Dtype := Get_Decl_Type (Decl);
Emit_Type (Dtype);
Gen_Info_Header (Abbrev_Variable);
Emit_Decl_Ident (Decl);
Emit_Type_Ref (Dtype);
case Get_Decl_Kind (Decl) is
when OD_Local =>
Emit_Local_Location (Decl);
when OD_Var =>
Emit_Global_Location (Decl);
when others =>
raise Program_Error;
end case;
end Emit_Variable;
procedure Emit_Const (Decl : O_Dnode)
is
use Ortho_Code.Decls;
Dtype : O_Tnode;
begin
if Abbrev_Const = 0 then
Generate_Abbrev (Abbrev_Const);
-- FIXME: should be a TAG_Constant, however, GDB does not support it.
-- work-around: could use a const_type.
Gen_Abbrev_Header (DW_TAG_Variable, DW_CHILDREN_No);
Gen_Abbrev_Tuple (DW_AT_Name, DW_FORM_String);
Gen_Abbrev_Tuple (DW_AT_Type, DW_FORM_Ref4);
Gen_Abbrev_Tuple (DW_AT_Location, DW_FORM_Block1);
Gen_Abbrev_Tuple (0, 0);
end if;
Dtype := Get_Decl_Type (Decl);
Emit_Type (Dtype);
Gen_Info_Header (Abbrev_Const);
Emit_Decl_Ident (Decl);
Emit_Type_Ref (Dtype);
Emit_Global_Location (Decl);
end Emit_Const;
procedure Emit_Type_Decl (Decl : O_Dnode)
is
use Ortho_Code.Decls;
begin
Emit_Type (Get_Decl_Type (Decl));
end Emit_Type_Decl;
Subprg_Sym : Symbol;
Abbrev_Block : Unsigned_32 := 0;
procedure Emit_Block_Decl (Decl : O_Dnode)
is
use Ortho_Code.Decls;
Last : O_Dnode;
Sdecl : O_Dnode;
Sibling_Pc : Pc_Type;
begin
if Flag_Debug >= Debug_Dwarf then
if Abbrev_Block = 0 then
Generate_Abbrev (Abbrev_Block);
Gen_Abbrev_Header (DW_TAG_Lexical_Block, DW_CHILDREN_Yes);
Gen_Abbrev_Tuple (DW_AT_Sibling, DW_FORM_Ref4);
Gen_Abbrev_Tuple (DW_AT_Low_Pc, DW_FORM_Addr);
Gen_Abbrev_Tuple (DW_AT_High_Pc, DW_FORM_Addr);
Gen_Abbrev_Tuple (0, 0);
end if;
Gen_Info_Header (Abbrev_Block);
Sibling_Pc := Gen_Info_Sibling;
Gen_Ua_Addr (Subprg_Sym, Integer_32 (Get_Block_Info1 (Decl)));
Gen_Ua_Addr (Subprg_Sym, Integer_32 (Get_Block_Info2 (Decl)));
end if;
-- Emit decls for children.
Last := Get_Block_Last (Decl);
Sdecl := Decl + 1;
while Sdecl <= Last loop
Emit_Decl (Sdecl);
Sdecl := Get_Decl_Chain (Sdecl);
end loop;
if Flag_Debug >= Debug_Dwarf then
-- End of children.
Set_Current_Section (Info_Sect);
Gen_Uleb128 (0);
Patch_Info_Sibling (Sibling_Pc);
end if;
end Emit_Block_Decl;
Abbrev_Function : Unsigned_32 := 0;
Abbrev_Procedure : Unsigned_32 := 0;
Abbrev_Interface : Unsigned_32 := 0;
procedure Emit_Subprg_Body (Bod : O_Dnode)
is
use Ortho_Code.Decls;
Decl : constant O_Dnode := Get_Body_Decl (Bod);
Kind : constant OD_Kind := Get_Decl_Kind (Decl);
Idecl : O_Dnode;
Prev_Subprg_Sym : Symbol;
Sibling_Pc : Pc_Type;
begin
-- Emit interfaces type.
Idecl := Get_Subprg_Interfaces (Decl);
while Idecl /= O_Dnode_Null loop
Emit_Type (Get_Decl_Type (Idecl));
Idecl := Get_Interface_Chain (Idecl);
end loop;
if Kind = OD_Function then
Emit_Type (Get_Decl_Type (Decl));
if Abbrev_Function = 0 then
Generate_Abbrev (Abbrev_Function);
Gen_Abbrev_Header (DW_TAG_Subprogram, DW_CHILDREN_Yes);
Gen_Abbrev_Tuple (DW_AT_Name, DW_FORM_String);
Gen_Abbrev_Tuple (DW_AT_Low_Pc, DW_FORM_Addr);
Gen_Abbrev_Tuple (DW_AT_High_Pc, DW_FORM_Addr);
if Flag_Debug >= Debug_Dwarf then
Gen_Abbrev_Tuple (DW_AT_Type, DW_FORM_Ref4);
Gen_Abbrev_Tuple (DW_AT_Sibling, DW_FORM_Ref4);
Gen_Abbrev_Tuple (DW_AT_Frame_Base, DW_FORM_Block1);
end if;
--Gen_Abbrev_Tuple (DW_AT_Return_Addr, DW_FORM_Block1);
Gen_Abbrev_Tuple (0, 0);
end if;
Gen_Info_Header (Abbrev_Function);
else
if Abbrev_Procedure = 0 then
Generate_Abbrev (Abbrev_Procedure);
Gen_Abbrev_Header (DW_TAG_Subprogram, DW_CHILDREN_Yes);
Gen_Abbrev_Tuple (DW_AT_Name, DW_FORM_String);
Gen_Abbrev_Tuple (DW_AT_Low_Pc, DW_FORM_Addr);
Gen_Abbrev_Tuple (DW_AT_High_Pc, DW_FORM_Addr);
if Flag_Debug >= Debug_Dwarf then
Gen_Abbrev_Tuple (DW_AT_Sibling, DW_FORM_Ref4);
Gen_Abbrev_Tuple (DW_AT_Frame_Base, DW_FORM_Block1);
end if;
--Gen_Abbrev_Tuple (DW_AT_Return_Addr, DW_FORM_Block1);
Gen_Abbrev_Tuple (0, 0);
end if;
Gen_Info_Header (Abbrev_Procedure);
end if;
-- Name.
Emit_Decl_Ident (Decl);
-- Low, High.
Prev_Subprg_Sym := Subprg_Sym;
Subprg_Sym := Binary.Get_Decl_Symbol (Decl);
Gen_Ua_Addr (Subprg_Sym, 0);
Gen_Ua_Addr (Subprg_Sym, Integer_32 (Get_Body_Info (Bod)));
if Flag_Debug >= Debug_Dwarf then
-- Type.
if Kind = OD_Function then
Emit_Decl_Type (Decl);
end if;
-- Sibling.
Sibling_Pc := Gen_Info_Sibling;
-- Frame base.
Gen_8 (1);
case Arch is
when Arch_X86 =>
Gen_8 (DW_OP_Reg5); -- ebp
when Arch_X86_64 =>
Gen_8 (DW_OP_Reg6); -- rbp
when others =>
raise Program_Error;
end case;
end if;
-- Interfaces.
Idecl := Get_Subprg_Interfaces (Decl);
if Idecl /= O_Dnode_Null
and then Flag_Debug >= Debug_Dwarf
then
if Abbrev_Interface = 0 then
Generate_Abbrev (Abbrev_Interface);
Gen_Abbrev_Header (DW_TAG_Formal_Parameter, DW_CHILDREN_No);
Gen_Abbrev_Tuple (DW_AT_Type, DW_FORM_Ref4);
Gen_Abbrev_Tuple (DW_AT_Name, DW_FORM_String);
Gen_Abbrev_Tuple (DW_AT_Location, DW_FORM_Block1);
Gen_Abbrev_Tuple (0, 0);
end if;
loop
Gen_Info_Header (Abbrev_Interface);
Emit_Decl_Type (Idecl);
Emit_Decl_Ident (Idecl);
Emit_Local_Location (Idecl);
Idecl := Get_Interface_Chain (Idecl);
exit when Idecl = O_Dnode_Null;
end loop;
end if;
-- Internal declarations.
Emit_Block_Decl (Bod + 1);
-- End of children.
Gen_Uleb128 (0);
if Flag_Debug >= Debug_Dwarf then
Patch_Info_Sibling (Sibling_Pc);
end if;
Subprg_Sym := Prev_Subprg_Sym;
end Emit_Subprg_Body;
procedure Emit_Decl (Decl : O_Dnode)
is
use Ada.Text_IO;
use Ortho_Code.Decls;
begin
if Flag_Debug = Debug_Dwarf then
case Get_Decl_Kind (Decl) is
when OD_Type =>
Emit_Type_Decl (Decl);
when OD_Local
| OD_Var =>
Emit_Variable (Decl);
when OD_Const =>
Emit_Const (Decl);
when OD_Function
| OD_Procedure
| OD_Interface =>
null;
when OD_Body =>
Emit_Subprg_Body (Decl);
when OD_Block =>
Emit_Block_Decl (Decl);
when others =>
Put_Line ("dwarf.emit_decl: emit "
& OD_Kind'Image (Get_Decl_Kind (Decl)));
end case;
elsif Flag_Debug = Debug_Line then
if Get_Decl_Kind (Decl) = OD_Body then
Emit_Subprg_Body (Decl);
end if;
end if;
end Emit_Decl;
procedure Emit_Subprg (Bod : O_Dnode) is
begin
Emit_Decls_Until (Bod);
Emit_Decl (Bod);
Last_Decl := Decls.Get_Decl_Chain (Bod);
end Emit_Subprg;
procedure Mark (M : out Mark_Type) is
begin
M.Last_Decl := Last_Decl;
M.Last_Tnode := TOnodes.Last;
end Mark;
procedure Release (M : Mark_Type) is
begin
Last_Decl := M.Last_Decl;
TOnodes.Set_Last (M.Last_Tnode);
end Release;
end Ortho_Code.Dwarf;
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