[Valgrind-users] What is the problem?

[Haobing W. <hw...@ep...>]

Hello,

When I used "valgrind --leak-check=yes" to check my C program, it gave
such information:

==2363== Invalid read of size 4
==2363==    at 0x8049949: main (gating_grinder2J.c:410)
==2363==    by 0x40279A46: __libc_start_main (in /lib/libc-2.3.2.so)
==2363==    by 0x80487C0: ??? (start.S:81)
==2363==    Address 0x41209920 is 0 bytes after a block of size 528
alloc'd
==2363==    at 0x4002942A: malloc (vg_replace_malloc.c:153)
==2363==    by 0x8049025: main (gating_grinder2J.c:247)
==2363==    by 0x40279A46: __libc_start_main (in /lib/libc-2.3.2.so)
==2363==    by 0x80487C0: ??? (start.S:81)
Done.
 
==2363==
==2363== ERROR SUMMARY: 4096 errors from 1 contexts (suppressed: 0 from
0)
==2363== malloc/free: in use at exit: 19081 bytes in 8 blocks.
==2363== malloc/free: 91010 allocs, 91002 frees, 45431125 bytes
allocated.
==2363== For counts of detected errors, rerun with: -v
==2363== searching for pointers to 8 not-freed blocks.
==2363== checked 3802352 bytes.
==2363==
==2363== LEAK SUMMARY:
==2363==    definitely lost: 0 bytes in 0 blocks.
==2363==    possibly lost:   0 bytes in 0 blocks.
==2363==    still reachable: 19081 bytes in 8 blocks.
==2363==         suppressed: 0 bytes in 0 blocks.
==2363== Reachable blocks (those to which a pointer was found) are not
shown.
==2363== To see them, rerun with: --show-reachable=yes
==2363==


Does anybody know what is the problem with the error? I couldn't find
any error in my program and it seemed that the program could run
normally. The line 247 in main is:
vec_rows[k] = (float *)malloc(Timepts*sizeof(float))

Any help is much appreciated!

Haobing