URL
https://opencores.org/ocsvn/openrisc/openrisc/trunk
Subversion Repositories openrisc
[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [gcc/] [ada/] [memtrack.adb] - Rev 710
Go to most recent revision | Compare with Previous | Blame | View Log
------------------------------------------------------------------------------ -- -- -- GNAT RUN-TIME COMPONENTS -- -- -- -- S Y S T E M . M E M O R Y -- -- -- -- B o d y -- -- -- -- Copyright (C) 2001-2009, Free Software Foundation, Inc. -- -- -- -- GNAT is free software; you can redistribute it and/or modify it under -- -- terms of the GNU General Public License as published by the Free Soft- -- -- ware Foundation; either version 3, or (at your option) any later ver- -- -- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- -- or FITNESS FOR A PARTICULAR PURPOSE. -- -- -- -- As a special exception under Section 7 of GPL version 3, you are granted -- -- additional permissions described in the GCC Runtime Library Exception, -- -- version 3.1, as published by the Free Software Foundation. -- -- -- -- You should have received a copy of the GNU General Public License and -- -- a copy of the GCC Runtime Library Exception along with this program; -- -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- -- <http://www.gnu.org/licenses/>. -- -- -- -- GNAT was originally developed by the GNAT team at New York University. -- -- Extensive contributions were provided by Ada Core Technologies Inc. -- -- -- ------------------------------------------------------------------------------ -- This version contains allocation tracking capability -- The object file corresponding to this instrumented version is to be found -- in libgmem. -- When enabled, the subsystem logs all the calls to __gnat_malloc and -- __gnat_free. This log can then be processed by gnatmem to detect -- dynamic memory leaks. -- To use this functionality, you must compile your application with -g -- and then link with this object file: -- gnatmake -g program -largs -lgmem -- After compilation, you may use your program as usual except that upon -- completion, it will generate in the current directory the file gmem.out. -- You can then investigate for possible memory leaks and mismatch by calling -- gnatmem with this file as an input: -- gnatmem -i gmem.out program -- See gnatmem section in the GNAT User's Guide for more details -- NOTE: This capability is currently supported on the following targets: -- Windows -- AIX -- GNU/Linux -- HP-UX -- Irix -- Solaris -- Tru64 -- Alpha OpenVMS -- NOTE FOR FUTURE PLATFORMS SUPPORT: It is assumed that type Duration is -- 64 bit. If the need arises to support architectures where this assumption -- is incorrect, it will require changing the way timestamps of allocation -- events are recorded. pragma Source_File_Name (System.Memory, Body_File_Name => "memtrack.adb"); with Ada.Exceptions; with System.Soft_Links; with System.Traceback; with System.Traceback_Entries; with GNAT.IO; with System.OS_Primitives; package body System.Memory is use Ada.Exceptions; use System.Soft_Links; use System.Traceback; use System.Traceback_Entries; use GNAT.IO; function c_malloc (Size : size_t) return System.Address; pragma Import (C, c_malloc, "malloc"); procedure c_free (Ptr : System.Address); pragma Import (C, c_free, "free"); function c_realloc (Ptr : System.Address; Size : size_t) return System.Address; pragma Import (C, c_realloc, "realloc"); subtype File_Ptr is System.Address; function fopen (Path : String; Mode : String) return File_Ptr; pragma Import (C, fopen); procedure OS_Exit (Status : Integer); pragma Import (C, OS_Exit, "__gnat_os_exit"); pragma No_Return (OS_Exit); procedure fwrite (Ptr : System.Address; Size : size_t; Nmemb : size_t; Stream : File_Ptr); procedure fwrite (Str : String; Size : size_t; Nmemb : size_t; Stream : File_Ptr); pragma Import (C, fwrite); procedure fputc (C : Integer; Stream : File_Ptr); pragma Import (C, fputc); procedure fclose (Stream : File_Ptr); pragma Import (C, fclose); procedure Finalize; pragma Export (C, Finalize, "__gnat_finalize"); -- Replace the default __gnat_finalize to properly close the log file Address_Size : constant := System.Address'Max_Size_In_Storage_Elements; -- Size in bytes of a pointer Max_Call_Stack : constant := 200; -- Maximum number of frames supported Tracebk : aliased array (0 .. Max_Call_Stack) of Traceback_Entry; Num_Calls : aliased Integer := 0; Gmemfname : constant String := "gmem.out" & ASCII.NUL; -- Allocation log of a program is saved in a file gmem.out -- ??? What about Ada.Command_Line.Command_Name & ".out" instead of static -- gmem.out Gmemfile : File_Ptr; -- Global C file pointer to the allocation log Needs_Init : Boolean := True; -- Reset after first call to Gmem_Initialize procedure Gmem_Initialize; -- Initialization routine; opens the file and writes a header string. This -- header string is used as a magic-tag to know if the .out file is to be -- handled by GDB or by the GMEM (instrumented malloc/free) implementation. First_Call : Boolean := True; -- Depending on implementation, some of the traceback routines may -- themselves do dynamic allocation. We use First_Call flag to avoid -- infinite recursion ----------- -- Alloc -- ----------- function Alloc (Size : size_t) return System.Address is Result : aliased System.Address; Actual_Size : aliased size_t := Size; Timestamp : aliased Duration; begin if Size = size_t'Last then Raise_Exception (Storage_Error'Identity, "object too large"); end if; -- Change size from zero to non-zero. We still want a proper pointer -- for the zero case because pointers to zero length objects have to -- be distinct, but we can't just go ahead and allocate zero bytes, -- since some malloc's return zero for a zero argument. if Size = 0 then Actual_Size := 1; end if; Lock_Task.all; Result := c_malloc (Actual_Size); if First_Call then -- Logs allocation call -- format is: -- 'A' <mem addr> <size chunk> <len backtrace> <addr1> ... <addrn> First_Call := False; if Needs_Init then Gmem_Initialize; end if; Timestamp := System.OS_Primitives.Clock; Call_Chain (Tracebk'Address, Max_Call_Stack, Num_Calls, Skip_Frames => 2); fputc (Character'Pos ('A'), Gmemfile); fwrite (Result'Address, Address_Size, 1, Gmemfile); fwrite (Actual_Size'Address, size_t'Max_Size_In_Storage_Elements, 1, Gmemfile); fwrite (Timestamp'Address, Duration'Max_Size_In_Storage_Elements, 1, Gmemfile); fwrite (Num_Calls'Address, Integer'Max_Size_In_Storage_Elements, 1, Gmemfile); for J in Tracebk'First .. Tracebk'First + Num_Calls - 1 loop declare Ptr : System.Address := PC_For (Tracebk (J)); begin fwrite (Ptr'Address, Address_Size, 1, Gmemfile); end; end loop; First_Call := True; end if; Unlock_Task.all; if Result = System.Null_Address then Raise_Exception (Storage_Error'Identity, "heap exhausted"); end if; return Result; end Alloc; -------------- -- Finalize -- -------------- procedure Finalize is begin if not Needs_Init then fclose (Gmemfile); end if; end Finalize; ---------- -- Free -- ---------- procedure Free (Ptr : System.Address) is Addr : aliased constant System.Address := Ptr; Timestamp : aliased Duration; begin Lock_Task.all; if First_Call then -- Logs deallocation call -- format is: -- 'D' <mem addr> <len backtrace> <addr1> ... <addrn> First_Call := False; if Needs_Init then Gmem_Initialize; end if; Call_Chain (Tracebk'Address, Max_Call_Stack, Num_Calls, Skip_Frames => 2); Timestamp := System.OS_Primitives.Clock; fputc (Character'Pos ('D'), Gmemfile); fwrite (Addr'Address, Address_Size, 1, Gmemfile); fwrite (Timestamp'Address, Duration'Max_Size_In_Storage_Elements, 1, Gmemfile); fwrite (Num_Calls'Address, Integer'Max_Size_In_Storage_Elements, 1, Gmemfile); for J in Tracebk'First .. Tracebk'First + Num_Calls - 1 loop declare Ptr : System.Address := PC_For (Tracebk (J)); begin fwrite (Ptr'Address, Address_Size, 1, Gmemfile); end; end loop; c_free (Ptr); First_Call := True; end if; Unlock_Task.all; end Free; --------------------- -- Gmem_Initialize -- --------------------- procedure Gmem_Initialize is Timestamp : aliased Duration; begin if Needs_Init then Needs_Init := False; System.OS_Primitives.Initialize; Timestamp := System.OS_Primitives.Clock; Gmemfile := fopen (Gmemfname, "wb" & ASCII.NUL); if Gmemfile = System.Null_Address then Put_Line ("Couldn't open gnatmem log file for writing"); OS_Exit (255); end if; fwrite ("GMEM DUMP" & ASCII.LF, 10, 1, Gmemfile); fwrite (Timestamp'Address, Duration'Max_Size_In_Storage_Elements, 1, Gmemfile); end if; end Gmem_Initialize; ------------- -- Realloc -- ------------- function Realloc (Ptr : System.Address; Size : size_t) return System.Address is Addr : aliased constant System.Address := Ptr; Result : aliased System.Address; Timestamp : aliased Duration; begin -- For the purposes of allocations logging, we treat realloc as a free -- followed by malloc. This is not exactly accurate, but is a good way -- to fit it into malloc/free-centered reports. if Size = size_t'Last then Raise_Exception (Storage_Error'Identity, "object too large"); end if; Abort_Defer.all; Lock_Task.all; if First_Call then First_Call := False; -- We first log deallocation call if Needs_Init then Gmem_Initialize; end if; Call_Chain (Tracebk'Address, Max_Call_Stack, Num_Calls, Skip_Frames => 2); Timestamp := System.OS_Primitives.Clock; fputc (Character'Pos ('D'), Gmemfile); fwrite (Addr'Address, Address_Size, 1, Gmemfile); fwrite (Timestamp'Address, Duration'Max_Size_In_Storage_Elements, 1, Gmemfile); fwrite (Num_Calls'Address, Integer'Max_Size_In_Storage_Elements, 1, Gmemfile); for J in Tracebk'First .. Tracebk'First + Num_Calls - 1 loop declare Ptr : System.Address := PC_For (Tracebk (J)); begin fwrite (Ptr'Address, Address_Size, 1, Gmemfile); end; end loop; -- Now perform actual realloc Result := c_realloc (Ptr, Size); -- Log allocation call using the same backtrace fputc (Character'Pos ('A'), Gmemfile); fwrite (Result'Address, Address_Size, 1, Gmemfile); fwrite (Size'Address, size_t'Max_Size_In_Storage_Elements, 1, Gmemfile); fwrite (Timestamp'Address, Duration'Max_Size_In_Storage_Elements, 1, Gmemfile); fwrite (Num_Calls'Address, Integer'Max_Size_In_Storage_Elements, 1, Gmemfile); for J in Tracebk'First .. Tracebk'First + Num_Calls - 1 loop declare Ptr : System.Address := PC_For (Tracebk (J)); begin fwrite (Ptr'Address, Address_Size, 1, Gmemfile); end; end loop; First_Call := True; end if; Unlock_Task.all; Abort_Undefer.all; if Result = System.Null_Address then Raise_Exception (Storage_Error'Identity, "heap exhausted"); end if; return Result; end Realloc; end System.Memory;
Go to most recent revision | Compare with Previous | Blame | View Log