From: "Kecheng" <kecheng@cecs.pdx.edu>
To: "caml-list" <caml-list@yquem.inria.fr>
Subject: OCaml memory leak issue
Date: Tue, 23 Nov 2010 19:54:24 -0800 [thread overview]
Message-ID: <201011231954241577004@cecs.pdx.edu> (raw)
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Hi,
I used valgrind to check the memory usage of my OCaml byte code, but I found that a memory leak. I'm very confused what the problem is. I tried a very simple code as following, and compileed it.
+++++++++++++++++++++++
let test =
let a = 1 in
let b = a + 5 in
printf "%d\n" b;
;;
test;;
+++++++++++++++++++++++
And I run valgrind to check:
valgrind --leak-check=yes ./obj/x86_LINUX/test5.byte.exe
I got the following report:
==21692== Memcheck, a memory error detector
==21692== Copyright (C) 2002-2009, and GNU GPL'd, by Julian Seward et al.
==21692== Using Valgrind-3.5.0 and LibVEX; rerun with -h for copyright info
==21692== Command: ./obj/x86_LINUX/test5.byte.exe
==21692==
6
==21692==
==21692== HEAP SUMMARY:
==21692== in use at exit: 430,488 bytes in 20 blocks
==21692== total heap usage: 68 allocs, 48 frees, 446,837 bytes allocated
==21692==
==21692== 120 bytes in 1 blocks are definitely lost in loss record 9 of 17
==21692== at 0x4A05E1C: malloc (vg_replace_malloc.c:195)
==21692== by 0x9AA510: caml_init_major_heap (in /home/kecheng/symbolic_simulation/cvc_test/cvc_1.5/obj/x86_LINUX/test5.byte.exe)
==21692== by 0x9A2A1A: caml_init_gc (in /home/kecheng/symbolic_simulation/cvc_test/cvc_1.5/obj/x86_LINUX/test5.byte.exe)
==21692== by 0x997E9D: caml_main (in /home/kecheng/symbolic_simulation/cvc_test/cvc_1.5/obj/x86_LINUX/test5.byte.exe)
==21692== by 0x9981CB: main (in /home/kecheng/symbolic_simulation/cvc_test/cvc_1.5/obj/x86_LINUX/test5.byte.exe)
==21692==
==21692== LEAK SUMMARY:
==21692== definitely lost: 120 bytes in 1 blocks
==21692== indirectly lost: 0 bytes in 0 blocks
==21692== possibly lost: 0 bytes in 0 blocks
==21692== still reachable: 430,368 bytes in 19 blocks
==21692== suppressed: 0 bytes in 0 blocks
==21692== Reachable blocks (those to which a pointer was found) are not shown.
==21692== To see them, rerun with: --leak-check=full --show-reachable=yes
==21692==
==21692== For counts of detected and suppressed errors, rerun with: -v
==21692== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 4 from 4)
Kecheng
2010-11-23
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next reply other threads:[~2010-11-24 3:54 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-24 3:54 Kecheng [this message]
2010-11-24 4:06 ` [Caml-list] " Edgar Friendly
2010-11-24 7:30 ` Török Edwin
2010-11-24 22:40 ` Goswin von Brederlow
2010-11-24 23:41 ` DS
2010-11-25 13:27 ` Goswin von Brederlow
2010-11-25 7:42 ` Christophe TROESTLER
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