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From bugzi...@apache.org
Subject DO NOT REPLY [Bug 39471] New: - Memory leak in rotatelogs.c file (tested by valgrind)
Date Wed, 03 May 2006 12:57:41 GMT
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http://issues.apache.org/bugzilla/show_bug.cgi?id=39471

           Summary: Memory leak in rotatelogs.c file (tested by valgrind)
           Product: Apache httpd-2
           Version: 2.3-HEAD
          Platform: Other
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Build
        AssignedTo: bugs@httpd.apache.org
        ReportedBy: dsail@zedo.com


The following was shown when valgrind was used on rotatelogs.c file 

deep@dev03:~/src/httpd-
2.0.58/support> /home/deep/valgrind/runvalgrind/bin/valgrind --tool=memcheck --
leak-check=yes ./rotatelogs
==26239== Memcheck, a memory error detector.
==26239== Copyright (C) 2002-2005, and GNU GPL'd, by Julian Seward et al.
==26239== Using LibVEX rev 1575, a library for dynamic binary translation.
==26239== Copyright (C) 2004-2005, and GNU GPL'd, by OpenWorks LLP.
==26239== Using valgrind-3.1.1, a dynamic binary instrumentation framework.
==26239== Copyright (C) 2000-2005, and GNU GPL'd, by Julian Seward et al.
==26239== For more details, rerun with: -v
==26239==
==26240==
==26240== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 7 from 4)
==26240== malloc/free: in use at exit: 18,956 bytes in 531 blocks.
==26240== malloc/free: 1,086 allocs, 555 frees, 58,905 bytes allocated.
==26240== For counts of detected errors, rerun with: -v
==26240== searching for pointers to 531 not-freed blocks.
==26240== checked 982,680 bytes.
==26240==
==26240== 33 bytes in 1 blocks are definitely lost in loss record 1 of 3
==26240==    at 0x4A18CF6: malloc (vg_replace_malloc.c:149)
==26240==    by 0x454375: xmalloc (in /bin/bash)
==26240==    by 0x440394: execute_command_internal (in /bin/bash)
==26240==    by 0x43F83E: execute_command (in /bin/bash)
==26240==    by 0x440FEA: execute_command_internal (in /bin/bash)
==26240==    by 0x43F83E: execute_command (in /bin/bash)
==26240==    by 0x43781A: reader_loop (in /bin/bash)
==26240==    by 0x4368F5: main (in /bin/bash)
==26240==
==26240== LEAK SUMMARY:
==26240==    definitely lost: 33 bytes in 1 blocks.
==26240==      possibly lost: 0 bytes in 0 blocks.
==26240==    still reachable: 18,923 bytes in 530 blocks.
==26240==         suppressed: 0 bytes in 0 blocks.
==26240== Reachable blocks (those to which a pointer was found) are not shown.
==26240== To see them, rerun with: --show-reachable=yes
==26242==
==26242== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 7 from 4)
==26242== malloc/free: in use at exit: 43,569 bytes in 1,259 blocks.
==26242== malloc/free: 4,137 allocs, 2,878 frees, 226,494 bytes allocated.
==26242== For counts of detected errors, rerun with: -v
==26242== searching for pointers to 1,259 not-freed blocks.
==26242== checked 1,005,000 bytes.
==26242==
==26242== 27 bytes in 1 blocks are definitely lost in loss record 1 of 4
==26242==    at 0x4A18CF6: malloc (vg_replace_malloc.c:149)
==26242==    by 0x454375: xmalloc (in /bin/bash)
==26242==    by 0x440394: execute_command_internal (in /bin/bash)
==26242==    by 0x454E2F: parse_and_execute (in /bin/bash)
==26242==    by 0x44BCF1: command_substitute (in /bin/bash)
==26242==    by 0x44CCD3: (within /bin/bash)
==26242==    by 0x44C9CE: (within /bin/bash)
==26242==    by 0x44F818: (within /bin/bash)
==26242==    by 0x441732: (within /bin/bash)
==26242==    by 0x43FB69: execute_command_internal (in /bin/bash)
==26242==    by 0x43F83E: execute_command (in /bin/bash)
==26242==    by 0x43FD9C: execute_command_internal (in /bin/bash)
==26242==
==26242== LEAK SUMMARY:
==26242==    definitely lost: 27 bytes in 1 blocks.
==26242==      possibly lost: 0 bytes in 0 blocks.
==26242==    still reachable: 43,542 bytes in 1,258 blocks.
==26242==         suppressed: 0 bytes in 0 blocks.
==26242== Reachable blocks (those to which a pointer was found) are not shown.
==26242== To see them, rerun with: --show-reachable=yes
==26241==
==26241== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 7 from 4)
==26241== malloc/free: in use at exit: 42,739 bytes in 1,234 blocks.
==26241== malloc/free: 4,097 allocs, 2,863 frees, 224,510 bytes allocated.
==26241== For counts of detected errors, rerun with: -v
==26241== searching for pointers to 1,234 not-freed blocks.
==26241== checked 1,004,200 bytes.
==26241==
==26241== LEAK SUMMARY:
==26241==    definitely lost: 0 bytes in 0 blocks.
==26241==      possibly lost: 0 bytes in 0 blocks.
==26241==    still reachable: 42,739 bytes in 1,234 blocks.
==26241==         suppressed: 0 bytes in 0 blocks.
==26241== Reachable blocks (those to which a pointer was found) are not shown.
==26241== To see them, rerun with: --show-reachable=yes
==26244==
==26244== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 7 from 4)
==26244== malloc/free: in use at exit: 43,495 bytes in 1,255 blocks.
==26244== malloc/free: 4,173 allocs, 2,918 frees, 226,612 bytes allocated.
==26244== For counts of detected errors, rerun with: -v
==26244== searching for pointers to 1,255 not-freed blocks.
==26244== checked 1,005,256 bytes.
==26244==
==26244== LEAK SUMMARY:
==26244==    definitely lost: 0 bytes in 0 blocks.
==26244==      possibly lost: 0 bytes in 0 blocks.
==26244==    still reachable: 43,495 bytes in 1,255 blocks.
==26244==         suppressed: 0 bytes in 0 blocks.
==26244== Reachable blocks (those to which a pointer was found) are not shown.
==26244== To see them, rerun with: --show-reachable=yes
==26243==
==26243== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 7 from 4)
==26243== malloc/free: in use at exit: 42,360 bytes in 1,219 blocks.
==26243== malloc/free: 4,160 allocs, 2,941 frees, 226,216 bytes allocated.
==26243== For counts of detected errors, rerun with: -v
==26243== searching for pointers to 1,219 not-freed blocks.
==26243== checked 1,003,704 bytes.
==26243==
==26243== LEAK SUMMARY:
==26243==    definitely lost: 0 bytes in 0 blocks.
==26243==      possibly lost: 0 bytes in 0 blocks.
==26243==    still reachable: 42,360 bytes in 1,219 blocks.
==26243==         suppressed: 0 bytes in 0 blocks.
==26243== Reachable blocks (those to which a pointer was found) are not shown.
==26243== To see them, rerun with: --show-reachable=yes
==26246==
==26246== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 7 from 4)
==26246== malloc/free: in use at exit: 42,274 bytes in 1,217 blocks.
==26246== malloc/free: 4,230 allocs, 3,013 frees, 228,079 bytes allocated.
==26246== For counts of detected errors, rerun with: -v
==26246== searching for pointers to 1,217 not-freed blocks.
==26246== checked 1,003,456 bytes.
==26246==
==26246== LEAK SUMMARY:
==26246==    definitely lost: 0 bytes in 0 blocks.
==26246==      possibly lost: 0 bytes in 0 blocks.
==26246==    still reachable: 42,274 bytes in 1,217 blocks.
==26246==         suppressed: 0 bytes in 0 blocks.
==26246== Reachable blocks (those to which a pointer was found) are not shown.
==26246== To see them, rerun with: --show-reachable=yes
==26249==
==26249== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 7 from 4)
==26249== malloc/free: in use at exit: 41,845 bytes in 1,204 blocks.
==26249== malloc/free: 4,295 allocs, 3,091 frees, 229,537 bytes allocated.
==26249== For counts of detected errors, rerun with: -v
==26249== searching for pointers to 1,204 not-freed blocks.
==26249== checked 1,002,848 bytes.
==26249==
==26249== LEAK SUMMARY:
==26249==    definitely lost: 0 bytes in 0 blocks.
==26249==      possibly lost: 0 bytes in 0 blocks.
==26249==    still reachable: 41,845 bytes in 1,204 blocks.
==26249==         suppressed: 0 bytes in 0 blocks.
==26249== Reachable blocks (those to which a pointer was found) are not shown.
==26249== To see them, rerun with: --show-reachable=yes
==26252==
==26252== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 7 from 4)
==26252== malloc/free: in use at exit: 327,087 bytes in 2,094 blocks.
==26252== malloc/free: 7,274 allocs, 5,180 frees, 586,780 bytes allocated.
==26252== For counts of detected errors, rerun with: -v
==26252== searching for pointers to 2,094 not-freed blocks.
==26252== checked 1,021,688 bytes.
==26252==
==26252== 1,718 bytes in 1 blocks are definitely lost in loss record 1 of 4
==26252==    at 0x4A18CF6: malloc (vg_replace_malloc.c:149)
==26252==    by 0x454375: xmalloc (in /bin/bash)
==26252==    by 0x440394: execute_command_internal (in /bin/bash)
==26252==    by 0x454E2F: parse_and_execute (in /bin/bash)
==26252==    by 0x43F5F1: (within /bin/bash)
==26252==    by 0x4418ED: (within /bin/bash)
==26252==    by 0x43FB69: execute_command_internal (in /bin/bash)
==26252==    by 0x454E2F: parse_and_execute (in /bin/bash)
==26252==    by 0x44BCF1: command_substitute (in /bin/bash)
==26252==    by 0x44CCD3: (within /bin/bash)
==26252==    by 0x44D5C8: (within /bin/bash)
==26252==    by 0x44D95A: (within /bin/bash)
==26252==
==26252== LEAK SUMMARY:
==26252==    definitely lost: 1,718 bytes in 1 blocks.
==26252==      possibly lost: 0 bytes in 0 blocks.
==26252==    still reachable: 325,369 bytes in 2,093 blocks.
==26252==         suppressed: 0 bytes in 0 blocks.
==26252== Reachable blocks (those to which a pointer was found) are not shown.
==26252== To see them, rerun with: --show-reachable=yes
==26251==
==26251== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 7 from 4)
==26251== malloc/free: in use at exit: 308,442 bytes in 1,329 blocks.
==26251== malloc/free: 5,583 allocs, 4,254 frees, 560,353 bytes allocated.
==26251== For counts of detected errors, rerun with: -v
==26251== searching for pointers to 1,329 not-freed blocks.
==26251== checked 1,008,248 bytes.
==26251==
==26251== LEAK SUMMARY:
==26251==    definitely lost: 0 bytes in 0 blocks.
==26251==      possibly lost: 0 bytes in 0 blocks.
==26251==    still reachable: 308,442 bytes in 1,329 blocks.
==26251==         suppressed: 0 bytes in 0 blocks.
==26251== Reachable blocks (those to which a pointer was found) are not shown.
==26251== To see them, rerun with: --show-reachable=yes
Usage: /home/deep/src/httpd-2.0.58/support/.libs/lt-rotatelogs [-l] <logfile> 
<rotation time in seconds> [offset minutes from UTC] or <rotation size in 
megabytes>

Add this:

TransferLog "|/home/deep/src/httpd-2.0.58/support/.libs/lt-
rotatelogs /some/where 86400"

or

TransferLog "|/home/deep/src/httpd-2.0.58/support/.libs/lt-
rotatelogs /some/where 5M"

to httpd.conf. The generated name will be /some/where.nnnn where nnnn is the
system time at which the log nominally starts (N.B. if using a rotation time,
the time will always be a multiple of the rotation time, so you can synchronize
cron scripts with it). At the end of each rotation time or when the file size
is reached a new log is started.

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