/usr/share/fpcsrc/2.6.2/compiler/procinfo.pas is in fpc-source-2.6.2 2.6.2-8.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 | {
Copyright (c) 1998-2002 by Florian Klaempfl
Information about the current procedure that is being compiled
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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
****************************************************************************
}
unit procinfo;
{$i fpcdefs.inc}
interface
uses
{ common }
cclasses,
{ global }
globtype,globals,verbose,
{ symtable }
symconst,symtype,symdef,symsym,
{ aasm }
cpubase,cpuinfo,cgbase,cgutils,
aasmbase,aasmtai,aasmdata,
optutils
;
const
inherited_inlining_flags : tprocinfoflags =
[pi_do_call,
{ the stack frame can't be removed in this case }
pi_has_assembler_block,
pi_uses_exceptions];
type
tsavedlabels = array[Boolean] of TAsmLabel;
{# This object gives information on the current routine being
compiled.
}
tprocinfo = class(tlinkedlistitem)
private
{ list to store the procinfo's of the nested procedures }
nestedprocs : tlinkedlist;
procedure addnestedproc(child: tprocinfo);
public
{ pointer to parent in nested procedures }
parent : tprocinfo;
{# the definition of the routine itself }
procdef : tprocdef;
{ procinfo of the main procedure that is inlining
the current function, only used in tcgcallnode.inlined_pass2 }
inlining_procinfo : tprocinfo;
{ file location of begin of procedure }
entrypos : tfileposinfo;
{ file location of end of procedure }
exitpos : tfileposinfo;
{ local switches at begin of procedure }
entryswitches : tlocalswitches;
{ local switches at end of procedure }
exitswitches : tlocalswitches;
{ Size of the parameters on the stack }
para_stack_size : pint;
{ Offset of temp after para/local are allocated }
tempstart : longint;
{# some collected informations about the procedure
see pi_xxxx constants above
}
flags : tprocinfoflags;
{ register used as frame pointer }
framepointer : tregister;
{ register containing currently the got }
got : tregister;
CurrGOTLabel : tasmlabel;
{ Holds the reference used to store all saved registers. }
save_regs_ref : treference;
{ Labels for TRUE/FALSE condition, BREAK and CONTINUE }
CurrBreakLabel,
CurrContinueLabel,
CurrTrueLabel,
CurrFalseLabel : tasmlabel;
{ label to leave the sub routine }
CurrExitLabel : tasmlabel;
{# The code for the routine itself, excluding entry and
exit code. This is a linked list of tai classes.
}
aktproccode : TAsmList;
{ Data (like jump tables) that belongs to this routine }
aktlocaldata : TAsmList;
{ max. of space need for parameters }
maxpushedparasize : aint;
constructor create(aparent:tprocinfo);virtual;
destructor destroy;override;
procedure allocate_push_parasize(size:longint);
function calc_stackframe_size:longint;virtual;
{ Set the address of the first temp, can be used to allocate
space for pushing parameters }
procedure set_first_temp_offset;virtual;
{ Generate parameter information }
procedure generate_parameter_info;virtual;
{ Allocate got register }
procedure allocate_got_register(list: TAsmList);virtual;
{ Destroy the entire procinfo tree, starting from the outermost parent }
procedure destroy_tree;
{ Store CurrTrueLabel and CurrFalseLabel to saved and generate new ones }
procedure save_jump_labels(out saved: tsavedlabels);
{ Restore CurrTrueLabel and CurrFalseLabel from saved }
procedure restore_jump_labels(const saved: tsavedlabels);
function get_first_nestedproc: tprocinfo;
function has_nestedprocs: boolean;
end;
tcprocinfo = class of tprocinfo;
var
cprocinfo : tcprocinfo;
{ information about the current sub routine being parsed (@var(pprocinfo))}
current_procinfo : tprocinfo;
implementation
uses
cutils,systems,
tgobj,cgobj,
paramgr
;
{****************************************************************************
TProcInfo
****************************************************************************}
constructor tprocinfo.create(aparent:tprocinfo);
begin
parent:=aparent;
procdef:=nil;
para_stack_size:=0;
flags:=[];
framepointer:=NR_FRAME_POINTER_REG;
maxpushedparasize:=0;
{ asmlists }
aktproccode:=TAsmList.Create;
aktlocaldata:=TAsmList.Create;
reference_reset(save_regs_ref,sizeof(aint));
{ labels }
current_asmdata.getjumplabel(CurrExitLabel);
current_asmdata.getjumplabel(CurrGOTLabel);
CurrBreakLabel:=nil;
CurrContinueLabel:=nil;
CurrTrueLabel:=nil;
CurrFalseLabel:=nil;
maxpushedparasize:=0;
if Assigned(parent) and (parent.procdef.parast.symtablelevel>=normal_function_level) then
parent.addnestedproc(Self);
end;
destructor tprocinfo.destroy;
begin
nestedprocs.free;
aktproccode.free;
aktlocaldata.free;
end;
procedure tprocinfo.destroy_tree;
var
hp: tprocinfo;
begin
hp:=Self;
while Assigned(hp.parent) do
hp:=hp.parent;
hp.Free;
end;
procedure tprocinfo.addnestedproc(child: tprocinfo);
begin
if nestedprocs=nil then
nestedprocs:=TLinkedList.Create;
nestedprocs.insert(child);
end;
function tprocinfo.get_first_nestedproc: tprocinfo;
begin
if assigned(nestedprocs) then
result:=tprocinfo(nestedprocs.first)
else
result:=nil;
end;
function tprocinfo.has_nestedprocs: boolean;
begin
result:=assigned(nestedprocs) and (nestedprocs.count>0);
end;
procedure tprocinfo.save_jump_labels(out saved: tsavedlabels);
begin
saved[false]:=CurrFalseLabel;
saved[true]:=CurrTrueLabel;
current_asmdata.getjumplabel(CurrTrueLabel);
current_asmdata.getjumplabel(CurrFalseLabel);
end;
procedure tprocinfo.restore_jump_labels(const saved: tsavedlabels);
begin
CurrFalseLabel:=saved[false];
CurrTrueLabel:=saved[true];
end;
procedure tprocinfo.allocate_push_parasize(size:longint);
begin
if size>maxpushedparasize then
maxpushedparasize:=size;
end;
function tprocinfo.calc_stackframe_size:longint;
begin
result:=Align(tg.direction*tg.lasttemp,current_settings.alignment.localalignmin);
end;
procedure tprocinfo.set_first_temp_offset;
begin
end;
procedure tprocinfo.generate_parameter_info;
begin
{ generate callee paraloc register info, it initialises the size that
is allocated on the stack }
procdef.init_paraloc_info(calleeside);
para_stack_size:=procdef.calleeargareasize;
end;
procedure tprocinfo.allocate_got_register(list: TAsmList);
begin
{ most os/cpu combo's don't use this yet, so not yet abstract }
end;
end.
|