OpenEuphoria

Re: Big memory leak in division operator example !

• Posted by Domingo Alvarez Duarte <domingo at dad-it.com> Jun 20, 2007
• 657 views

And here is the converte to C program with "-g" flag and under valgrind:


$ valgrind --show-reachable=yes --leak-check=yes ./test-memory-leak2 
==13912== Memcheck, a memory error detector.
==13912== Copyright (C) 2002-2006, and GNU GPL'd, by Julian Seward et al.
==13912== Using LibVEX rev 1658, a library for dynamic binary translation.
==13912== Copyright (C) 2004-2006, and GNU GPL'd, by OpenWorks LLP.
==13912== Using valgrind-3.2.1-Debian, a dynamic binary instrumentation
framework.
==13912== Copyright (C) 2000-2006, and GNU GPL'd, by Julian Seward et al.
==13912== For more details, rerun with: -v
==13912== 
==13912== Invalid write of size 4
==13912==    at 0x80536BE: InitTask (be_task.c:273)
==13912==    by 0x8048FF0: (within
/home/mingo/downloads/euphoria/euSQLite3/test-memory-leak2)
==13912==  Address 0xBE986714 is not stack'd, malloc'd or (recently) free'd
==13912== 
==13912== Invalid write of size 4
==13912==    at 0x80536C7: InitTask (be_task.c:279)
==13912==    by 0x8048FF0: (within
/home/mingo/downloads/euphoria/euSQLite3/test-memory-leak2)
==13912==  Address 0xBE9A5714 is not stack'd, malloc'd or (recently) free'd
No memory leak till now !!!
starting division...
Look at the memory leak now !!!!
finished...
==13912== 
==13912== ERROR SUMMARY: 2 errors from 2 contexts (suppressed: 15 from 1)
==13912== malloc/free: in use at exit: 2,980 bytes in 152 blocks.
==13912== malloc/free: 160 allocs, 8 frees, 4,314 bytes allocated.
==13912== For counts of detected errors, rerun with: -v
==13912== searching for pointers to 152 not-freed blocks.
==13912== checked 261,940 bytes.
==13912== 
==13912== 
==13912== 4 bytes in 1 blocks are still reachable in loss record 1 of 8
==13912==    at 0x4020620: malloc (vg_replace_malloc.c:149)
==13912==    by 0x804AD6E: machine (be_machine.c:2523)
==13912==    by 0x8048FF0: (within
/home/mingo/downloads/euphoria/euSQLite3/test-memory-leak2)
==13912== 
==13912== 
==13912== 8 bytes in 1 blocks are still reachable in loss record 2 of 8
==13912==    at 0x4020620: malloc (vg_replace_malloc.c:149)
==13912==    by 0x804D2FF: shift_args (be_runtime.c:4272)
==13912==    by 0x8048FF0: (within
/home/mingo/downloads/euphoria/euSQLite3/test-memory-leak2)
==13912== 
==13912== 
==13912== 8 bytes in 1 blocks are still reachable in loss record 3 of 8
==13912==    at 0x4020620: malloc (vg_replace_malloc.c:149)
==13912==    by 0x804E615: eu_startup (be_runtime.c:3624)
==13912==    by 0x8048FF0: (within
/home/mingo/downloads/euphoria/euSQLite3/test-memory-leak2)
==13912== 
==13912== 
==13912== 100 bytes in 1 blocks are still reachable in loss record 4 of 8
==13912==    at 0x4020620: malloc (vg_replace_malloc.c:149)
==13912==    by 0x8053620: InitTask (be_task.c:242)
==13912==    by 0x8048FF0: (within
/home/mingo/downloads/euphoria/euSQLite3/test-memory-leak2)
==13912== 
==13912== 
==13912== 108 bytes in 9 blocks are definitely lost in loss record 5 of 8
==13912==    at 0x4020620: malloc (vg_replace_malloc.c:149)
==13912==    by 0x804BC86: NewDouble (be_inline.c:46)
==13912==    by 0x8048FF0: (within
/home/mingo/downloads/euphoria/euSQLite3/test-memory-leak2)
==13912== 
==13912== 
==13912== 120 bytes in 10 blocks are still reachable in loss record 6 of 8
==13912==    at 0x4020620: malloc (vg_replace_malloc.c:149)
==13912==    by 0x804C71E: tmp_alloc (be_alloc.c:155)
==13912==    by 0x8048FF0: (within
/home/mingo/downloads/euphoria/euSQLite3/test-memory-leak2)
==13912== 
==13912== 
==13912== 1,240 bytes in 13 blocks are definitely lost in loss record 7 of 8
==13912==    at 0x4020620: malloc (vg_replace_malloc.c:149)
==13912==    by 0x804C62A: NewS1 (be_alloc.c:752)
==13912==    by 0x8048FF0: (within
/home/mingo/downloads/euphoria/euSQLite3/test-memory-leak2)
==13912== 
==13912== 
==13912== 1,392 bytes in 116 blocks are still reachable in loss record 8 of 8
==13912==    at 0x4020620: malloc (vg_replace_malloc.c:149)
==13912==    by 0x804BC86: NewDouble (be_inline.c:46)
==13912==    by 0x8048FF0: (within
/home/mingo/downloads/euphoria/euSQLite3/test-memory-leak2)
==13912== 
==13912== LEAK SUMMARY:
==13912==    definitely lost: 1,348 bytes in 22 blocks.
==13912==      possibly lost: 0 bytes in 0 blocks.
==13912==    still reachable: 1,632 bytes in 130 blocks.
==13912==         suppressed: 0 bytes in 0 blocks.