1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1997-2002, Ada Core Technologies, Inc. --
11 -- GNAT is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 2, or (at your option) any later ver- --
14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNAT; see file COPYING. If not, write --
19 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
20 -- MA 02111-1307, USA. --
22 -- GNAT was originally developed by the GNAT team at New York University. --
23 -- Extensive contributions were provided by Ada Core Technologies Inc. --
25 ------------------------------------------------------------------------------
27 -- GNATMEM is a utility that tracks memory leaks. It is based on a simple
29 -- - run the application under gdb
30 -- - set a breakpoint on __gnat_malloc and __gnat_free
31 -- - record a reference to the allocated memory on each allocation call
32 -- - suppress this reference on deallocation
33 -- - at the end of the program, remaining references are potential leaks.
34 -- sort them out the best possible way in order to locate the root of
37 -- GNATMEM can also be used with instrumented allocation/deallocation
38 -- routine (see a-raise.c with symbol GMEM defined). This is not supported
39 -- in all platforms, again refer to a-raise.c for further information.
40 -- In this case the application must be relinked with library libgmem.a:
42 -- $ gnatmake my_prog -largs -lgmem
44 -- The running my_prog will produce a file named gmem.out that will be
47 -- In order to help finding out the real leaks, the notion of "allocation
48 -- root" is defined. An allocation root is a specific point in the program
49 -- execution generating memory allocation where data is collected (such as
50 -- number of allocations, quantify of memory allocated, high water mark,
53 with Ada.Command_Line; use Ada.Command_Line;
54 with Ada.Text_IO; use Ada.Text_IO;
55 with Ada.Text_IO.C_Streams;
56 with Ada.Float_Text_IO;
57 with Ada.Integer_Text_IO;
58 with Gnatvsn; use Gnatvsn;
59 with GNAT.Heap_Sort_G;
61 with GNAT.HTable; use GNAT.HTable;
62 with Interfaces.C_Streams; use Interfaces.C_Streams;
63 with System; use System;
64 with System.Storage_Elements; use System.Storage_Elements;
66 with Memroot; use Memroot;
70 ------------------------------------------------
71 -- Potentially Target Dependent Subprograms. --
72 ------------------------------------------------
74 function Get_Current_TTY return String;
75 -- Give the current tty on which the program is run. This is needed to
76 -- separate the output of the debugger from the output of the program.
77 -- The output of this function will be used to call the gdb command "tty"
78 -- in the gdb script in order to get the program output on the current tty
79 -- while the gdb output is redirected and processed by gnatmem.
81 function popen (File, Mode : System.Address) return FILEs;
82 pragma Import (C, popen, "popen");
83 -- Execute the program 'File'. If the mode is "r" the standard output
84 -- of the program is redirected and the FILEs handler of the
85 -- redirection is returned.
87 procedure System_Cmd (X : System.Address);
88 pragma Import (C, System_Cmd, "system");
89 -- Execute the program "X".
91 subtype Cstring is String (1 .. Integer'Last);
92 type Cstring_Ptr is access all Cstring;
94 function ttyname (Dec : Integer) return Cstring_Ptr;
95 pragma Import (C, ttyname, "__gnat_ttyname");
96 -- Return a null-terminated string containing the current tty
98 Dir_Sep : constant Character := '/';
100 ------------------------
101 -- Other Declarations --
102 ------------------------
104 type Gdb_Output_Elmt is (Eof, Alloc, Deall);
105 -- Eof = End of gdb output file
106 -- Alloc = found a ALLOC mark in the gdb output
107 -- Deall = found a DEALL mark in the gdb output
108 Gdb_Output_Format_Error : exception;
110 function Read_Next return Gdb_Output_Elmt;
111 -- Read the output of the debugger till it finds either the end of the
112 -- output, or the 'ALLOC' mark or the 'DEALL' mark. In the second case,
113 -- it sets the Tmp_Size and Tmp_Address global variables, in the
114 -- third case it sets the Tmp_Address variable.
116 procedure Create_Gdb_Script;
117 -- Create the GDB script and save it in a temporary file
119 function Mem_Image (X : Storage_Count) return String;
120 -- X is a size in storage_element. Returns a value
121 -- in Megabytes, Kiloytes or Bytes as appropriate.
123 procedure Process_Arguments;
124 -- Read command line arguments;
127 -- Prints out the option help
129 function Gmem_Initialize (Dumpname : String) return Boolean;
130 -- Opens the file represented by Dumpname and prepares it for
131 -- work. Returns False if the file does not have the correct format, True
134 procedure Gmem_A2l_Initialize (Exename : String);
135 -- Initialises the convert_addresses interface by supplying it with
136 -- the name of the executable file Exename
138 procedure Gmem_Read_Next (Buf : out String; Last : out Natural);
139 -- Reads the next allocation/deallocation entry and its backtrace
140 -- and prepares in the string Buf (up to the position of Last) the
141 -- expression compatible with gnatmem parser:
142 -- Allocation entry produces the expression "ALLOC^[size]^0x[address]^"
143 -- Deallocation entry produces the expression "DEALLOC^0x[address]^"
145 Argc : constant Integer := Argument_Count;
146 Gnatmem_Tmp : aliased constant String := "gnatmem.tmp";
148 Mode_R : aliased constant String (1 .. 2) := 'r' & ASCII.NUL;
149 Mode_W : aliased constant String (1 .. 3) := "w+" & ASCII.NUL;
151 -----------------------------------
152 -- HTable address --> Allocation --
153 -----------------------------------
155 type Allocation is record
157 Size : Storage_Count;
160 type Address_Range is range 0 .. 4097;
161 function H (A : Integer_Address) return Address_Range;
162 No_Alloc : constant Allocation := (No_Root_Id, 0);
164 package Address_HTable is new GNAT.HTable.Simple_HTable (
165 Header_Num => Address_Range,
166 Element => Allocation,
167 No_Element => No_Alloc,
168 Key => Integer_Address,
172 BT_Depth : Integer := 1;
175 File_Pos : Integer := 0;
176 Exec_Pos : Integer := 0;
177 Target_Pos : Integer := 0;
178 Run_Gdb : Boolean := True;
180 Global_Alloc_Size : Storage_Count := 0;
181 Global_High_Water_Mark : Storage_Count := 0;
182 Global_Nb_Alloc : Integer := 0;
183 Global_Nb_Dealloc : Integer := 0;
184 Nb_Root : Integer := 0;
185 Nb_Wrong_Deall : Integer := 0;
186 Target_Name : String (1 .. 80);
187 Target_Protocol : String (1 .. 80);
188 Target_Name_Len : Integer;
189 Target_Protocol_Len : Integer;
190 Cross_Case : Boolean := False;
192 Tmp_Size : Storage_Count := 0;
193 Tmp_Address : Integer_Address;
194 Tmp_Alloc : Allocation;
195 Quiet_Mode : Boolean := False;
197 --------------------------------
198 -- GMEM functionality binding --
199 --------------------------------
201 function Gmem_Initialize (Dumpname : String) return Boolean is
202 function Initialize (Dumpname : System.Address) return Boolean;
203 pragma Import (C, Initialize, "__gnat_gmem_initialize");
204 S : aliased String := Dumpname & ASCII.NUL;
206 return Initialize (S'Address);
209 procedure Gmem_A2l_Initialize (Exename : String) is
210 procedure A2l_Initialize (Exename : System.Address);
211 pragma Import (C, A2l_Initialize, "__gnat_gmem_a2l_initialize");
212 S : aliased String := Exename & ASCII.NUL;
214 A2l_Initialize (S'Address);
215 end Gmem_A2l_Initialize;
217 procedure Gmem_Read_Next (Buf : out String; Last : out Natural) is
218 procedure Read_Next (buf : System.Address);
219 pragma Import (C, Read_Next, "__gnat_gmem_read_next");
220 function Strlen (str : System.Address) return Natural;
221 pragma Import (C, Strlen, "strlen");
223 S : String (1 .. 1000);
225 Read_Next (S'Address);
226 Last := Strlen (S'Address);
227 Buf (1 .. Last) := S (1 .. Last);
230 ---------------------
231 -- Get_Current_TTY --
232 ---------------------
234 function Get_Current_TTY return String is
236 stdout : constant Integer := 1;
237 Max_TTY_Name : constant Integer := 500;
240 if isatty (stdout) /= 1 then
246 for J in Cstring'First .. Max_TTY_Name loop
247 if Res (J) = ASCII.NUL then
248 return Res (Cstring'First .. J - 1);
253 -- if we fall thru the ttyname result was dubious. Just forget it.
262 function H (A : Integer_Address) return Address_Range is
264 return Address_Range (A mod Integer_Address (Address_Range'Last));
267 -----------------------
268 -- Create_Gdb_Script --
269 -----------------------
271 procedure Create_Gdb_Script is
276 Create (FD, Out_File, Gnatmem_Tmp);
279 Put_Line ("Cannot create temporary file : " & Gnatmem_Tmp);
280 GNAT.OS_Lib.OS_Exit (1);
284 TTY : constant String := Get_Current_TTY;
286 if TTY'Length > 0 then
287 Put_Line (FD, "tty " & TTY);
293 Put (FD, Target_Protocol (1 .. Target_Protocol_Len));
295 Put (FD, Argument (Target_Pos));
298 Put_Line (FD, Argument (Exec_Pos));
301 -- In the native case, run the program before setting the
302 -- breakpoints so that gnatmem will also work with shared
305 Put_Line (FD, "set lang c");
306 Put_Line (FD, "break main");
307 Put_Line (FD, "set lang auto");
309 for J in Exec_Pos + 1 .. Argc loop
311 Put (FD, Argument (J));
315 -- At this point, gdb knows about __gnat_malloc and __gnat_free
318 -- Make sure that outputting long backtraces do not pause
320 Put_Line (FD, "set height 0");
321 Put_Line (FD, "set width 0");
324 Put_Line (FD, "break __gnat_malloc");
325 Put_Line (FD, "command");
326 Put_Line (FD, " silent");
327 Put_Line (FD, " set lang c");
328 Put_Line (FD, " set print address on");
329 Put_Line (FD, " up");
330 Put_Line (FD, " set $gm_addr = $pc");
331 Put_Line (FD, " printf ""\n\n""");
332 Put_Line (FD, " printf ""ALLOC^0x%x^\n"", $gm_addr");
333 Put_Line (FD, " set print address off");
334 Put_Line (FD, " set lang auto");
336 Put_Line (FD, "break __gnat_malloc");
337 Put_Line (FD, "command");
338 Put_Line (FD, " silent");
339 Put_Line (FD, " set lang c");
340 Put_Line (FD, " set $gm_size = size");
341 Put_Line (FD, " set print address on");
342 Put_Line (FD, " up");
343 Put_Line (FD, " set $gm_addr = $pc");
344 Put_Line (FD, " printf ""\n\n""");
345 Put_Line (FD, " printf ""ALLOC^%d^0x%x^\n"", $gm_size, $gm_addr");
346 Put_Line (FD, " set print address off");
347 Put_Line (FD, " set lang auto");
350 Put (FD, " backtrace");
352 if BT_Depth /= 0 then
353 Put (FD, Integer'Image (BT_Depth + 1));
358 Put_Line (FD, " printf ""\n\n""");
359 Put_Line (FD, " continue");
360 Put_Line (FD, "end");
363 Put_Line (FD, "break __gnat_free");
364 Put_Line (FD, "command");
365 Put_Line (FD, " silent");
366 Put_Line (FD, " set print address on");
367 Put_Line (FD, " printf ""\n\n""");
368 Put_Line (FD, " printf ""DEALL^0x%x^\n"", ptr");
369 Put_Line (FD, " set print address off");
370 Put_Line (FD, " up");
372 Put (FD, " backtrace");
374 if BT_Depth /= 0 then
375 Put (FD, Integer'Image (BT_Depth + 1));
380 Put_Line (FD, " printf ""\n\n""");
381 Put_Line (FD, " continue");
382 Put_Line (FD, "end");
389 Put_Line (FD, Argument (Exec_Pos));
391 if Target_Protocol (1 .. Target_Protocol_Len) = "wtx" then
393 Put_Line (FD, Argument (Exec_Pos));
396 Put_Line (FD, "continue");
400 end Create_Gdb_Script;
406 function Mem_Image (X : Storage_Count) return String is
407 Ks : constant Storage_Count := X / 1024;
408 Megs : constant Storage_Count := Ks / 1024;
409 Buff : String (1 .. 7);
413 Ada.Float_Text_IO.Put (Buff, Float (X) / 1024.0 / 1024.0, 2, 0);
414 return Buff & " Megabytes";
417 Ada.Float_Text_IO.Put (Buff, Float (X) / 1024.0, 2, 0);
418 return Buff & " Kilobytes";
421 Ada.Integer_Text_IO.Put (Buff (1 .. 4), Integer (X));
422 return Buff (1 .. 4) & " Bytes";
434 Put (Gnat_Version_String);
435 Put_Line (" Copyright 1997-2002 Free Software Foundation, Inc.");
439 Put_Line (Command_Name
440 & " [-q] [n] [-o file] target entry_point ...");
441 Put_Line (Command_Name & " [-q] [n] [-i file]");
444 Put_Line ("GDB mode");
445 Put_Line (" " & Command_Name
446 & " [-q] [n] [-o file] program arg1 arg2 ...");
447 Put_Line (" " & Command_Name
448 & " [-q] [n] [-i file]");
450 Put_Line ("GMEM mode");
451 Put_Line (" " & Command_Name
452 & " [-q] [n] -i gmem.out program arg1 arg2 ...");
456 Put_Line (" -q quiet, minimum output");
457 Put_Line (" n number of frames for allocation root backtraces");
458 Put_Line (" default is 1.");
459 Put_Line (" -o file save gdb output in 'file' and process data");
460 Put_Line (" post mortem. also keep the gdb script around");
461 Put_Line (" -i file don't run gdb output. Do only post mortem");
462 Put_Line (" processing from file");
463 GNAT.OS_Lib.OS_Exit (1);
466 -----------------------
467 -- Process_Arguments --
468 -----------------------
470 procedure Process_Arguments is
473 procedure Check_File (Arg_Pos : Integer; For_Creat : Boolean := False);
474 -- Check that Argument (Arg_Pos) is an existing file if For_Creat is
475 -- false or if it is possible to create it if For_Creat is true
477 procedure Check_File (Arg_Pos : Integer; For_Creat : Boolean := False) is
478 Name : aliased constant String := Argument (Arg_Pos) & ASCII.NUL;
483 FD := fopen (Name'Address, Mode_W'Address);
485 FD := fopen (Name'Address, Mode_R'Address);
488 if FD = NULL_Stream then
491 Put_Line ("Cannot create file : " & Argument (Arg_Pos));
493 Put_Line ("Cannot locate file : " & Argument (Arg_Pos));
502 -- Start of processing for Process_Arguments
506 -- Is it a cross version?
509 Std_Name : constant String := "gnatmem";
510 Name : constant String := Command_Name;
511 End_Pref : constant Integer := Name'Last - Std_Name'Length;
514 if Name'Length > Std_Name'Length + 9
516 Name (End_Pref + 1 .. Name'Last) = Std_Name
518 Name (End_Pref - 8 .. End_Pref) = "-vxworks-"
522 Target_Name_Len := End_Pref - 1;
523 for J in reverse Name'First .. End_Pref - 1 loop
524 if Name (J) = Dir_Sep then
525 Target_Name_Len := Target_Name_Len - J;
530 Target_Name (1 .. Target_Name_Len)
531 := Name (End_Pref - Target_Name_Len .. End_Pref - 1);
533 if Target_Name (1 .. 5) = "alpha" then
534 Target_Protocol (1 .. 7) := "vxworks";
535 Target_Protocol_Len := 7;
537 Target_Protocol (1 .. 3) := "wtx";
538 Target_Protocol_Len := 3;
551 if Argument (Arg) = "-q" then
561 -- Deal with back trace depth
563 if Argument (Arg) (1) in '0' .. '9' then
565 BT_Depth := Integer'Value (Argument (Arg));
578 -- Deal with "-o file" or "-i file"
580 while Arg <= Argc and then Argument (Arg) (1) = '-' loop
587 case Argument (Arg - 1) (2) is
589 Check_File (Arg, For_Creat => True);
596 if Gmem_Initialize (Argument (Arg)) then
601 Put_Line ("Unknown option : " & Argument (Arg));
607 if Argc < Arg and then Run_Gdb then
612 -- In the cross case, we first get the target
618 if Argc < Arg and then Run_Gdb then
623 -- Now all the following arguments are to be passed to gdb
627 Check_File (Exec_Pos);
634 Check_File (Exec_Pos);
635 Gmem_A2l_Initialize (Argument (Exec_Pos));
638 -- ... in other cases further arguments are disallowed
640 elsif Arg <= Argc then
643 end Process_Arguments;
649 function Read_Next return Gdb_Output_Elmt is
650 Max_Line : constant Integer := 100;
651 Line : String (1 .. Max_Line);
654 Curs1, Curs2 : Integer;
655 Separator : constant Character := '^';
657 function Next_Separator return Integer;
658 -- Return the index of the next separator after Curs1 in Line
660 function Next_Separator return Integer is
661 Curs : Integer := Curs1;
666 raise Gdb_Output_Format_Error;
668 elsif Line (Curs) = Separator then
676 -- Start of processing for Read_Next
683 Gmem_Read_Next (Line, Last);
685 Get_Line (FT, Line, Last);
688 if Line (1 .. 14) = "Program exited" then
691 elsif Line (1 .. 5) = "ALLOC" then
692 -- ALLOC ^ <size> ^0x <addr> ^
697 Curs2 := Next_Separator - 1;
699 if not Quiet_Mode then
700 Tmp_Size := Storage_Count'Value (Line (Curs1 .. Curs2));
703 -- Read the address, skip "^0x"
706 Curs2 := Next_Separator - 1;
707 Tmp_Address := Integer_Address'Value (
708 "16#" & Line (Curs1 .. Curs2) & "#");
711 elsif Line (1 .. 5) = "DEALL" then
712 -- DEALL ^ 0x <addr> ^
714 -- Read the address, skip "^0x"
717 Curs2 := Next_Separator - 1;
718 Tmp_Address := Integer_Address'Value (
719 "16#" & Line (Curs1 .. Curs2) & "#");
726 Put_Line ("### incorrect user program termination detected.");
727 Put_Line (" following data may not be meaningful");
732 -- Start of processing for Gnatmem
741 -- Now we start the gdb session using the following syntax
743 -- gdb --nx --nw -batch -x gnatmem.tmp
745 -- If there is a -o option we redirect the gdb output in the specified
746 -- file, otherwise we just read directly from a pipe.
748 if File_Pos /= 0 then
750 Name : aliased String := Argument (File_Pos) & ASCII.NUL;
756 Cmd : aliased String := Target_Name (1 .. Target_Name_Len)
757 & "-gdb --nx --nw -batch -x " & Gnatmem_Tmp & " > "
760 System_Cmd (Cmd'Address);
766 := "gdb --nx --nw " & Argument (Exec_Pos)
767 & " -batch -x " & Gnatmem_Tmp & " > "
770 System_Cmd (Cmd'Address);
775 if not Gmem_Mode then
776 FD := fopen (Name'Address, Mode_R'Address);
783 Cmd : aliased String := Target_Name (1 .. Target_Name_Len)
784 & "-gdb --nx --nw -batch -x " & Gnatmem_Tmp & ASCII.NUL;
786 FD := popen (Cmd'Address, Mode_R'Address);
790 Cmd : aliased String := "gdb --nx --nw " & Argument (Exec_Pos)
791 & " -batch -x " & Gnatmem_Tmp & ASCII.NUL;
794 FD := popen (Cmd'Address, Mode_R'Address);
799 -- Open the FD file as a regular Text_IO file
801 if not Gmem_Mode then
802 Ada.Text_IO.C_Streams.Open (FT, In_File, FD);
805 -- Main loop analysing the data generated by the debugger
806 -- for each allocation, the backtrace is kept and stored in a htable
807 -- whose entry is the address. Fore ach deallocation, we look for the
808 -- corresponding allocation and cancel it.
817 -- Update global counters if the allocated size is meaningful
820 Tmp_Alloc.Root := Read_BT (BT_Depth, FT);
821 if Nb_Alloc (Tmp_Alloc.Root) = 0 then
822 Nb_Root := Nb_Root + 1;
824 Set_Nb_Alloc (Tmp_Alloc.Root, Nb_Alloc (Tmp_Alloc.Root) + 1);
825 Address_HTable.Set (Tmp_Address, Tmp_Alloc);
827 elsif Tmp_Size > 0 then
829 Global_Alloc_Size := Global_Alloc_Size + Tmp_Size;
830 Global_Nb_Alloc := Global_Nb_Alloc + 1;
832 if Global_High_Water_Mark < Global_Alloc_Size then
833 Global_High_Water_Mark := Global_Alloc_Size;
836 -- Read the corresponding back trace
838 Tmp_Alloc.Root := Read_BT (BT_Depth, FT);
840 -- Update the number of allocation root if this is a new one
842 if Nb_Alloc (Tmp_Alloc.Root) = 0 then
843 Nb_Root := Nb_Root + 1;
846 -- Update allocation root specific counters
848 Set_Alloc_Size (Tmp_Alloc.Root,
849 Alloc_Size (Tmp_Alloc.Root) + Tmp_Size);
851 Set_Nb_Alloc (Tmp_Alloc.Root, Nb_Alloc (Tmp_Alloc.Root) + 1);
853 if High_Water_Mark (Tmp_Alloc.Root)
854 < Alloc_Size (Tmp_Alloc.Root)
856 Set_High_Water_Mark (Tmp_Alloc.Root,
857 Alloc_Size (Tmp_Alloc.Root));
860 -- Associate this allocation root to the allocated address
862 Tmp_Alloc.Size := Tmp_Size;
863 Address_HTable.Set (Tmp_Address, Tmp_Alloc);
865 -- non meaninful output, just consumes the backtrace
868 Tmp_Alloc.Root := Read_BT (BT_Depth, FT);
873 -- Get the corresponding Dealloc_Size and Root
875 Tmp_Alloc := Address_HTable.Get (Tmp_Address);
877 if Tmp_Alloc.Root = No_Root_Id then
879 -- There was no prior allocation at this address, something is
880 -- very wrong. Mark this allocation root as problematic a
882 Tmp_Alloc.Root := Read_BT (BT_Depth, FT);
884 if Nb_Alloc (Tmp_Alloc.Root) = 0 then
885 Set_Nb_Alloc (Tmp_Alloc.Root, Nb_Alloc (Tmp_Alloc.Root) - 1);
886 Nb_Wrong_Deall := Nb_Wrong_Deall + 1;
890 -- Update global counters
892 if not Quiet_Mode then
893 Global_Alloc_Size := Global_Alloc_Size - Tmp_Alloc.Size;
895 Global_Nb_Dealloc := Global_Nb_Dealloc + 1;
897 -- Update allocation root specific counters
899 if not Quiet_Mode then
900 Set_Alloc_Size (Tmp_Alloc.Root,
901 Alloc_Size (Tmp_Alloc.Root) - Tmp_Alloc.Size);
903 Set_Nb_Alloc (Tmp_Alloc.Root, Nb_Alloc (Tmp_Alloc.Root) - 1);
905 -- update the number of allocation root if this one disappear
907 if Nb_Alloc (Tmp_Alloc.Root) = 0 then
908 Nb_Root := Nb_Root - 1;
911 -- De-associate the deallocated address
913 Address_HTable.Remove (Tmp_Address);
918 -- We can get rid of the temp file now
920 if Run_Gdb and then File_Pos = 0 then
924 X := unlink (Gnatmem_Tmp'Address);
928 -- Print out general information about overall allocation
930 if not Quiet_Mode then
931 Put_Line ("Global information");
932 Put_Line ("------------------");
934 Put (" Total number of allocations :");
935 Ada.Integer_Text_IO.Put (Global_Nb_Alloc, 4);
938 Put (" Total number of deallocations :");
939 Ada.Integer_Text_IO.Put (Global_Nb_Dealloc, 4);
942 Put_Line (" Final Water Mark (non freed mem) :"
943 & Mem_Image (Global_Alloc_Size));
944 Put_Line (" High Water Mark :"
945 & Mem_Image (Global_High_Water_Mark));
949 -- Print out the back traces corresponding to potential leaks in order
950 -- greatest number of non-deallocated allocations
952 Print_Back_Traces : declare
953 type Root_Array is array (Natural range <>) of Root_Id;
954 Leaks : Root_Array (0 .. Nb_Root);
955 Leak_Index : Natural := 0;
957 Bogus_Dealls : Root_Array (1 .. Nb_Wrong_Deall);
958 Deall_Index : Natural := 0;
960 procedure Move (From : Natural; To : Natural);
961 function Lt (Op1, Op2 : Natural) return Boolean;
962 package Root_Sort is new GNAT.Heap_Sort_G (Move, Lt);
964 procedure Move (From : Natural; To : Natural) is
966 Leaks (To) := Leaks (From);
969 function Lt (Op1, Op2 : Natural) return Boolean is
971 if Nb_Alloc (Leaks (Op1)) > Nb_Alloc (Leaks (Op2)) then
973 elsif Nb_Alloc (Leaks (Op1)) = Nb_Alloc (Leaks (Op2)) then
974 return Alloc_Size (Leaks (Op1)) > Alloc_Size (Leaks (Op2));
980 -- Start of processing for Print_Back_Traces
983 -- Transfer all the relevant Roots in the Leaks and a
984 -- Bogus_Deall arrays
986 Tmp_Alloc.Root := Get_First;
987 while Tmp_Alloc.Root /= No_Root_Id loop
988 if Nb_Alloc (Tmp_Alloc.Root) = 0 then
991 elsif Nb_Alloc (Tmp_Alloc.Root) < 0 then
992 Deall_Index := Deall_Index + 1;
993 Bogus_Dealls (Deall_Index) := Tmp_Alloc.Root;
996 Leak_Index := Leak_Index + 1;
997 Leaks (Leak_Index) := Tmp_Alloc.Root;
1000 Tmp_Alloc.Root := Get_Next;
1003 -- Print out wrong deallocations
1005 if Nb_Wrong_Deall > 0 then
1006 Put_Line ("Releasing deallocated memory at :");
1007 if not Quiet_Mode then
1008 Put_Line ("--------------------------------");
1011 for J in 1 .. Bogus_Dealls'Last loop
1012 Print_BT (Bogus_Dealls (J));
1017 -- Print out all allocation Leaks
1021 -- Sort the Leaks so that potentially important leaks appear first
1023 Root_Sort.Sort (Nb_Root);
1025 for J in 1 .. Leaks'Last loop
1027 if Nb_Alloc (Leaks (J)) = 1 then
1028 Put_Line (Integer'Image (Nb_Alloc (Leaks (J)))
1031 Put_Line (Integer'Image (Nb_Alloc (Leaks (J)))
1035 Put_Line ("Allocation Root #" & Integer'Image (J));
1036 Put_Line ("-------------------");
1038 Put (" Number of non freed allocations :");
1039 Ada.Integer_Text_IO.Put (Nb_Alloc (Leaks (J)), 4);
1042 Put_Line (" Final Water Mark (non freed mem) :"
1043 & Mem_Image (Alloc_Size (Leaks (J))));
1045 Put_Line (" High Water Mark :"
1046 & Mem_Image (High_Water_Mark (Leaks (J))));
1048 Put_Line (" Backtrace :");
1050 Print_BT (Leaks (J));
1054 end Print_Back_Traces;