[Tcl-bugs] [ tcl-Bugs-1083082 ] Memory leak at startup

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Bugs item #1083082, was opened at 2004-12-10 13:15
Message generated for change (Comment added) made by dgp
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=110894&aid=1083082&group_id=10894

>Category: 37. Init - Library - Autoload
Group: current: 8.5a2
Status: Open
Resolution: None
>Priority: 8
Submitted By: Rolf Ade (pointsman)
>Assigned to: Don Porter (dgp)
Summary: Memory leak at startup

Initial Comment:
tcl head 10 dec 2004, compiled with --enable-symbols,
-DPURIFY.

Script is only:

proc exit args {}

valgrind reports:

==18300== ERROR SUMMARY: 0 errors from 0 contexts
(suppressed: 27 from 2)
==18300== malloc/free: in use at exit: 12742 bytes in
264 blocks.
==18300== malloc/free: 6005 allocs, 5741 frees, 394569
bytes allocated.
==18300== For counts of detected errors, rerun with: -v
==18300== searching for pointers to 264 not-freed blocks.
==18300== checked 4668828 bytes.
==18300== 
==18300== 120 bytes in 5 blocks are definitely lost in
loss record 2 of 3
==18300==    at 0x40027B98: malloc
(vg_replace_malloc.c:153)
==18300==    by 0x40251A1D: TclpAlloc
(../generic/tclAlloc.c:685)
==18300==    by 0x402592E5: Tcl_Alloc
(../generic/tclCkalloc.c:1018)
==18300==    by 0x402DBD38: Tcl_NewStringObj
(../generic/tclStringObj.c:211)
==18300==    by 0x402E6C9E: TclGetProcessGlobalValue
(../generic/tclUtil.c:2798)
==18300==    by 0x4028801B: TclGetLibraryPath
(../generic/tclEncoding.c:325)
==18300==    by 0x4028B242:
InitializeEncodingSearchPath (../generic/tclEncoding
.c:3074)
==18300==    by 0x402E6C72: TclGetProcessGlobalValue
(../generic/tclUtil.c:2790)
==18300==    by 0x40287F91: TclGetEncodingSearchPath
(../generic/tclEncoding.c:2
81)
==18300==    by 0x4028808C: MakeFileMap
(../generic/tclEncoding.c:385)
==18300==    by 0x4028B3B8: InitializeEncodingFileMap
(../generic/tclEncoding.c:
3129)
==18300==    by 0x402E6C72: TclGetProcessGlobalValue
(../generic/tclUtil.c:2790)
==18300==    by 0x40288E8F: LoadEncodingFile
(../generic/tclEncoding.c:1344)
==18300==    by 0x4028857B: Tcl_GetEncoding
(../generic/tclEncoding.c:669)
==18300==    by 0x402F4811:
TclpGetEncodingNameFromEnvironment (tclUnixInit.c:61
5)
==18300==    by 0x402F4752: TclpSetInitialEncodings
(tclUnixInit.c:581)
==18300==    by 0x40288E31: Tcl_FindExecutable
(../generic/tclEncoding.c:1305)
==18300==    by 0x402BBC12: Tcl_Main
(../generic/tclMain.c:339)
==18300==    by 0x8048705: main (tclAppInit.c:87)
==18300==    by 0x4035D8AD: __libc_start_main (in
/lib/libc.so.6)
==18300== 
==18300== LEAK SUMMARY:
==18300==    definitely lost: 120 bytes in 5 blocks.
==18300==    possibly lost:   0 bytes in 0 blocks.
==18300==    still reachable: 12622 bytes in 259 blocks.
==18300==         suppressed: 0 bytes in 0 blocks.
==18300== Reachable blocks (those to which a pointer
was found) are not shown.
==18300== To see them, rerun with: --show-reachable=yes
==18300== 


----------------------------------------------------------------------

>Comment By: Don Porter (dgp)
Date: 2004-12-10 17:18

Message:
Logged In: YES 
user_id=80530

please test and report when you
get a chance.

----------------------------------------------------------------------

Comment By: Don Porter (dgp)
Date: 2004-12-10 14:57

Message:
Logged In: YES 
user_id=80530

updated patch should correct that too.



----------------------------------------------------------------------

Comment By: Rolf Ade (pointsman)
Date: 2004-12-10 14:35

Message:
Logged In: YES 
user_id=13222

Tested with the patch. Looks like sill not clean. 

Now valgrind reports:

==22390== ERROR SUMMARY: 0 errors from 0 contexts
(suppressed: 27 from 2)
==22390== malloc/free: in use at exit: 272 bytes in 10 blocks.
==22390== malloc/free: 5979 allocs, 5969 frees, 393962 bytes
allocated.
==22390== For counts of detected errors, rerun with: -v
==22390== searching for pointers to 10 not-freed blocks.
==22390== checked 4661072 bytes.
==22390== 
==22390== 48 bytes in 2 blocks are definitely lost in loss
record 1 of 3
==22390==    at 0x40027B98: malloc (vg_replace_malloc.c:153)
==22390==    by 0x40251A1D: TclpAlloc
(../generic/tclAlloc.c:685)
==22390==    by 0x402592E5: Tcl_Alloc
(../generic/tclCkalloc.c:1018)
==22390==    by 0x402DBD38: Tcl_NewStringObj
(../generic/tclStringObj.c:211)
==22390==    by 0x40288E6E: LoadEncodingFile
(../generic/tclEncoding.c:1338)
==22390==    by 0x4028857B: Tcl_GetEncoding
(../generic/tclEncoding.c:669)
==22390==    by 0x4028884B: Tcl_SetSystemEncoding
(../generic/tclEncoding.c:870)
==22390==    by 0x402F476D: TclpSetInitialEncodings
(tclUnixInit.c:581)
==22390==    by 0x40288E31: Tcl_FindExecutable
(../generic/tclEncoding.c:1305)
==22390==    by 0x402BBC12: Tcl_Main (../generic/tclMain.c:339)
==22390==    by 0x8048705: main (tclAppInit.c:87)
==22390==    by 0x4035D8AD: __libc_start_main (in
/lib/libc.so.6)
==22390==    by 0x8048630: (within
/usr/local/tcl-head/bin/tclsh8.5)
==22390== 
==22390== LEAK SUMMARY:
==22390==    definitely lost: 48 bytes in 2 blocks.
==22390==    possibly lost:   0 bytes in 0 blocks.
==22390==    still reachable: 224 bytes in 8 blocks.
==22390==         suppressed: 0 bytes in 0 blocks.


----------------------------------------------------------------------

Comment By: Don Porter (dgp)
Date: 2004-12-10 14:22

Message:
Logged In: YES 
user_id=80530

please test this patch.

----------------------------------------------------------------------

Comment By: Don Porter (dgp)
Date: 2004-12-10 14:17

Message:
Logged In: YES 
user_id=80530


Thanks for the report.

Looks like FreeThreadHash
is missing a ClearHash call...

----------------------------------------------------------------------

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