--- Martin Jenkins <[EMAIL PROTECTED]>写道:
> mycmos wrote:
> > When I use cat /proc/meminfo, I found the MemFree
> is
> > decreasing. Does that means some degree memory
> leak to
> > Sqlite2.8.17?
>
> No. ;)
>
> If you run "ps -ef" or "top" you'll see a list of
> all of the processes
> running on your machine. How could you associate
> changes in MemFree with
> any one of those processes? Short answer - you
> can't. ;)
>
> I ran sqlite's test suite last week and (IIRC) it
> has about 20,000 test
> cases. I didn't watch the whole test but I'd be
> surprised if there
> wasn't a memory leak test in there somewhere and
> given the number of
> people using sqlite I'm sure a leak in 2.8.17 would
> have been found and
> fixed by now.
>
> Martin
>
> PS Usual stuff about 2.8.17 being old and 3.3.6
> being new goes here.
>
I believe the memory leak exists. The following is
excerpt from sqlite-3.3.6 in valgrind (In fact, the
sqlite-2.8.17 in valgrind is similar):
[EMAIL PROTECTED] /data/lfs/sqlite-3.3.6]# valgrind
--leak-check=full ./sqlite3
==11762== Memcheck, a memory error detector.
==11762== Copyright (C) 2002-2005, and GNU GPL'd, by
Julian Seward et al.
==11762== Using LibVEX rev 1575, a library for dynamic
binary translation.
==11762== Copyright (C) 2004-2005, and GNU GPL'd, by
OpenWorks LLP.
==11762== Using valgrind-3.1.1, a dynamic binary
instrumentation framework.
==11762== Copyright (C) 2000-2005, and GNU GPL'd, by
Julian Seward et al.
==11762== For more details, rerun with: -v
==11762==
==11765==
==11765== ERROR SUMMARY: 0 errors from 0 contexts
(suppressed: 16 from 1)
==11765== malloc/free: in use at exit: 24,808 bytes in
1,109 blocks.
==11765== malloc/free: 2,831 allocs, 1,722 frees,
107,119 bytes allocated.
==11765== For counts of detected errors, rerun with:
-v
==11765== searching for pointers to 1,109 not-freed
blocks.
==11765== checked 129,076 bytes.
==11765==
==11765== 27 bytes in 1 blocks are definitely lost in
loss record 1 of 4
==11765== at 0x401B46D: malloc
(vg_replace_malloc.c:149)
==11765== by 0x80958E1: xmalloc (in /bin/bash)
==11765== by 0x8069D65: execute_command_internal
(in /bin/bash)
==11765== by 0x8099EBB: parse_and_execute (in
/bin/bash)
==11765== by 0x807E28A: command_substitute (in
/bin/bash)
==11765== by 0x8081F74: (within /bin/bash)
==11765== by 0x8081C03: (within /bin/bash)
==11765== by 0x80835A1: (within /bin/bash)
==11765== by 0x806A901: execute_command_internal
(in /bin/bash)
==11765== by 0x806C67F: execute_command (in
/bin/bash)
==11765== by 0x806D7C3: (within /bin/bash)
==11765== by 0x806A4F6: execute_command_internal
(in /bin/bash)
==11765==
==11765== LEAK SUMMARY:
==11765== definitely lost: 27 bytes in 1 blocks.
==11765== possibly lost: 0 bytes in 0 blocks.
==11765== still reachable: 24,781 bytes in 1,108
blocks.
==11765== suppressed: 0 bytes in 0 blocks.
==11765== Reachable blocks (those to which a pointer
was found) are not shown.
==11765== To see them, rerun with:
--show-reachable=yes
==11764==
==11764== ERROR SUMMARY: 0 errors from 0 contexts
(suppressed: 16 from 1)
==11764== malloc/free: in use at exit: 24,274 bytes in
1,085 blocks.
==11764== malloc/free: 2,792 allocs, 1,707 frees,
105,672 bytes allocated.
==11764== For counts of detected errors, rerun with:
-v
==11764== searching for pointers to 1,085 not-freed
blocks.
==11764== checked 128,544 bytes.
==11764==
==11764== LEAK SUMMARY:
==11764== definitely lost: 0 bytes in 0 blocks.
==11764== possibly lost: 0 bytes in 0 blocks.
==11764== still reachable: 24,274 bytes in 1,085
blocks.
==11764== suppressed: 0 bytes in 0 blocks.
==11764== Reachable blocks (those to which a pointer
was found) are not shown.
==11764== To see them, rerun with:
--show-reachable=yes
==11767==
==11767== ERROR SUMMARY: 0 errors from 0 contexts
(suppressed: 16 from 1)
==11767== malloc/free: in use at exit: 24,716 bytes in
1,104 blocks.
==11767== malloc/free: 2,868 allocs, 1,764 frees,
107,574 bytes allocated.
==11767== For counts of detected errors, rerun with:
-v
==11767== searching for pointers to 1,104 not-freed
blocks.
==11767== checked 129,208 bytes.
==11767==
==11767== 15 bytes in 1 blocks are definitely lost in
loss record 1 of 4
==11767== at 0x401B46D: malloc
(vg_replace_malloc.c:149)
==11767== by 0x80958E1: xmalloc (in /bin/bash)
==11767== by 0x806AF94: execute_command_internal
(in /bin/bash)
==11767== by 0x806DC83: (within /bin/bash)
==11767== by 0x806A1F4: execute_command_internal
(in /bin/bash)
==11767== by 0x8099EBB: parse_and_execute (in
/bin/bash)
==11767== by 0x807E28A: command_substitute (in
/bin/bash)
==11767== by 0x8081F74: (within /bin/bash)
==11767== by 0x8082634: (within /bin/bash)
==11767== by 0x8082EF0: (within /bin/bash)
==11767== by 0x8082F3C: expand_string_unsplit (in
/bin/bash)
==11767== by 0x807A974: (within /bin/bash)
==11767==
==11767== LEAK SUMMARY:
==11767== definitely lost: 15 bytes in 1 blocks.
==11767== possibly lost: 0 bytes in 0 blocks.
==11767== still reachable: 24,701 bytes in 1,103
blocks.
==11767== suppressed: 0 bytes in 0 blocks.
==11767== Reachable blocks (those to which a pointer
was found) are not shown.
==11767== To see them, rerun with:
--show-reachable=yes
==11766==
==11766== ERROR SUMMARY: 0 errors from 0 contexts
(suppressed: 16 from 1)
==11766== malloc/free: in use at exit: 23,959 bytes in
1,069 blocks.
==11766== malloc/free: 2,857 allocs, 1,788 frees,
107,204 bytes allocated.
==11766== For counts of detected errors, rerun with:
-v
==11766== searching for pointers to 1,069 not-freed
blocks.
==11766== checked 128,048 bytes.
==11766==
==11766== LEAK SUMMARY:
==11766== definitely lost: 0 bytes in 0 blocks.
==11766== possibly lost: 0 bytes in 0 blocks.
==11766== still reachable: 23,959 bytes in 1,069
blocks.
==11766== suppressed: 0 bytes in 0 blocks.
==11766== Reachable blocks (those to which a pointer
was found) are not shown.
==11766== To see them, rerun with:
--show-reachable=yes
==11769==
==11769== ERROR SUMMARY: 0 errors from 0 contexts
(suppressed: 16 from 1)
==11769== malloc/free: in use at exit: 23,879 bytes in
1,067 blocks.
==11769== malloc/free: 2,929 allocs, 1,862 frees,
108,962 bytes allocated.
==11769== For counts of detected errors, rerun with:
-v
==11769== searching for pointers to 1,067 not-freed
blocks.
==11769== checked 127,784 bytes.
==11769==
==11769== LEAK SUMMARY:
==11769== definitely lost: 0 bytes in 0 blocks.
==11769== possibly lost: 0 bytes in 0 blocks.
==11769== still reachable: 23,879 bytes in 1,067
blocks.
==11769== suppressed: 0 bytes in 0 blocks.
==11769== Reachable blocks (those to which a pointer
was found) are not shown.
==11769== To see them, rerun with:
--show-reachable=yes
==11772==
==11772== ERROR SUMMARY: 0 errors from 0 contexts
(suppressed: 16 from 1)
==11772== malloc/free: in use at exit: 23,522 bytes in
1,053 blocks.
==11772== malloc/free: 2,996 allocs, 1,943 frees,
110,348 bytes allocated.
==11772== For counts of detected errors, rerun with:
-v
==11772== searching for pointers to 1,053 not-freed
blocks.
==11772== checked 127,204 bytes.
==11772==
==11772== 25 bytes in 1 blocks are definitely lost in
loss record 1 of 4
==11772== at 0x401B46D: malloc
(vg_replace_malloc.c:149)
==11772== by 0x80958E1: xmalloc (in /bin/bash)
==11772== by 0x80A6B38: sh_canonpath (in /bin/bash)
==11772== by 0x80969FC: (within /bin/bash)
==11772== by 0x8096BCE: cd_builtin (in /bin/bash)
==11772== by 0x806924D: (within /bin/bash)
==11772== by 0x806AD70: execute_command_internal
(in /bin/bash)
==11772== by 0x806C67F: execute_command (in
/bin/bash)
==11772== by 0x806DA1E: (within /bin/bash)
==11772== by 0x806A1F4: execute_command_internal
(in /bin/bash)
==11772== by 0x8099EBB: parse_and_execute (in
/bin/bash)
==11772== by 0x807E28A: command_substitute (in
/bin/bash)
==11772==
==11772== LEAK SUMMARY:
==11772== definitely lost: 25 bytes in 1 blocks.
==11772== possibly lost: 0 bytes in 0 blocks.
==11772== still reachable: 23,497 bytes in 1,052
blocks.
==11772== suppressed: 0 bytes in 0 blocks.
==11772== Reachable blocks (those to which a pointer
was found) are not shown.
==11772== To see them, rerun with:
--show-reachable=yes
==11773==
==11773== ERROR SUMMARY: 0 errors from 0 contexts
(suppressed: 16 from 1)
==11773== malloc/free: in use at exit: 24,074 bytes in
1,071 blocks.
==11773== malloc/free: 3,159 allocs, 2,088 frees,
115,497 bytes allocated.
==11773== For counts of detected errors, rerun with:
-v
==11773== searching for pointers to 1,071 not-freed
blocks.
==11773== checked 127,728 bytes.
==11773==
==11773== LEAK SUMMARY:
==11773== definitely lost: 0 bytes in 0 blocks.
==11773== possibly lost: 0 bytes in 0 blocks.
==11773== still reachable: 24,074 bytes in 1,071
blocks.
==11773== suppressed: 0 bytes in 0 blocks.
==11773== Reachable blocks (those to which a pointer
was found) are not shown.
==11773== To see them, rerun with:
--show-reachable=yes
SQLite version 3.3.6
Enter ".help" for instructions
sqlite>
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