* GNAT memory leak in compiled code (3.13p/Linux) @ 2002-07-17 0:48 Marc A. Criley 2002-07-17 5:28 ` Simon Wright ` (2 more replies) 0 siblings, 3 replies; 5+ messages in thread From: Marc A. Criley @ 2002-07-17 0:48 UTC (permalink / raw) The appended program, when compiled with GNAT 3.13p on Linux (RedHat 6.2) experiences a memory leak. The offending line contains an implicit dereference that occurs when assigning to the Buf array slice. Does this leak occur in later versions of GNAT? Or on other platforms? The way I observed the memory leak occurring was by running the executable in one window and using the following Linux command in another: top -bq | grep mem_leak The fifth column is the total process size, which can be observed to continuously grow as the program runs. (Note to Robert Dewar: If this memory leak is present in later versions of GNAT, a bug report will of course be submitted to ACT via the appropriate mechanism.) Marc A. Criley, Consultant Quadrus Corporation www.quadruscorp.com ------------------------------------------------------------------------- with Ada.Strings.Unbounded; use Ada.Strings.Unbounded; procedure Mem_Leak is type Us_Uc_Array is array (Natural range <>) of Unbounded_String; type Us_Uc_Array_Ptr is access Us_Uc_Array; Buf : Us_Uc_Array_Ptr; Count : Natural := 0; procedure F(S : Us_Uc_Array) is begin -- The following line results in a memory leak when this program -- is compiled with GNAT 3.13p on Linux. Buf(1..S'Length) := S; -- Comment out the above line, and uncomment the following to -- see the program run with no memory leak. -- Buf.all(1..S'Length) := S; end F; begin Buf := new Us_Uc_Array(1..10_000); for I in 1..50 loop F((1..110 => To_Unbounded_String("Hello"))); delay 0.5; end loop; end Mem_Leak; ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: GNAT memory leak in compiled code (3.13p/Linux) 2002-07-17 0:48 GNAT memory leak in compiled code (3.13p/Linux) Marc A. Criley @ 2002-07-17 5:28 ` Simon Wright 2002-08-13 11:36 ` Preben Randhol 2002-07-17 8:37 ` Fabien Garcia 2002-07-20 2:51 ` Dave Taylor 2 siblings, 1 reply; 5+ messages in thread From: Simon Wright @ 2002-07-17 5:28 UTC (permalink / raw) "Marc A. Criley" <mcq95@earthlink.net> writes: > The appended program, when compiled with GNAT 3.13p on Linux (RedHat > 6.2) experiences a memory leak. The offending line contains an > implicit dereference that occurs when assigning to the Buf array > slice. 3.14p, 3.15a and gcc-3.1 all show stable memory usage. Slackware 7.1. ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: GNAT memory leak in compiled code (3.13p/Linux) 2002-07-17 5:28 ` Simon Wright @ 2002-08-13 11:36 ` Preben Randhol 0 siblings, 0 replies; 5+ messages in thread From: Preben Randhol @ 2002-08-13 11:36 UTC (permalink / raw) On 17 Jul 2002 06:28:29 +0100, Simon Wright wrote: > "Marc A. Criley" <mcq95@earthlink.net> writes: > >> The appended program, when compiled with GNAT 3.13p on Linux (RedHat >> 6.2) experiences a memory leak. The offending line contains an >> implicit dereference that occurs when assigning to the Buf array >> slice. > > 3.14p, 3.15a and gcc-3.1 all show stable memory usage. Slackware 7.1. Also 3.14p on Debian 3.0 Preben ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: GNAT memory leak in compiled code (3.13p/Linux) 2002-07-17 0:48 GNAT memory leak in compiled code (3.13p/Linux) Marc A. Criley 2002-07-17 5:28 ` Simon Wright @ 2002-07-17 8:37 ` Fabien Garcia 2002-07-20 2:51 ` Dave Taylor 2 siblings, 0 replies; 5+ messages in thread From: Fabien Garcia @ 2002-07-17 8:37 UTC (permalink / raw) I have no memory leak with Gnat 3.13p/Windows XP (sorry for the later :) Fabien ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: GNAT memory leak in compiled code (3.13p/Linux) 2002-07-17 0:48 GNAT memory leak in compiled code (3.13p/Linux) Marc A. Criley 2002-07-17 5:28 ` Simon Wright 2002-07-17 8:37 ` Fabien Garcia @ 2002-07-20 2:51 ` Dave Taylor 2 siblings, 0 replies; 5+ messages in thread From: Dave Taylor @ 2002-07-20 2:51 UTC (permalink / raw) It works OK in 3.13p / MacOS X. ^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2002-08-13 11:36 UTC | newest] Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2002-07-17 0:48 GNAT memory leak in compiled code (3.13p/Linux) Marc A. Criley 2002-07-17 5:28 ` Simon Wright 2002-08-13 11:36 ` Preben Randhol 2002-07-17 8:37 ` Fabien Garcia 2002-07-20 2:51 ` Dave Taylor
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