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[Valgrind-users] valgrind gives error for HelloWorld program
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From: Ying Z. <zh...@hp...> - 2014-07-07 15:07:16
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Hello,
I'm testing valgrind with a very simple C program:
#include <stdio.h>
int main()
{
printf ("Hello world\n");
return 0;
}
After compile and run it with valgrind
gcc -o main main.c
valgrind --tool=memcheck --track-origins=yes ./main
I got the following errors. I don't quite understand why there are 54 errors from 12 contexts (suppressed: 6 from 6) from a simple program. I'd appreciate if anyone could give me some insights.
Thank you,
Ying
----------------------
==49780== Memcheck, a memory error detector
==49780== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al.
==49780== Using Valgrind-3.9.0 and LibVEX; rerun with -h for copyright info
==49780== Command: ./main
==49780==
==49780== Conditional jump or move depends on uninitialised value(s)
==49780== at 0x4F58D05: ??? (in /lib64/libc-2.12.so)
==49780== by 0x9F8E5D7: ???
==49780== by 0x422200F: ???
==49780== by 0xFFEFFF387: ???
==49780== by 0xFFEFFF37F: ???
==49780== by 0xFFEFFF477: ???
==49780== by 0x1D: ???
==49780== by 0x9D7CD90: ??? (in /lib64/libselinux.so.1)
==49780== by 0xC1: ???
==49780== by 0xFFEFFF33D: ???
==49780== by 0xEF52: ???
==49780== by 0xFFF: ???
==49780== Uninitialised value was created
==49780== at 0x4F0F91A: ??? (in /lib64/libc-2.12.so)
==49780== by 0x4F0F9C4: ??? (in /lib64/libc-2.12.so)
==49780== by 0x51BDE7F: ???
==49780== by 0x51BDED7: ???
==49780== by 0x51BDED7: ???
==49780== by 0x4EAC918: ??? (in /lib64/libc-2.12.so)
==49780== by 0x23F: ???
==49780== by 0x4EA9029: ??? (in /lib64/libc-2.12.so)
==49780== by 0x566704E3E3A7: ???
==49780== by 0x237: ???
==49780== by 0x20FFF: ???
==49780== by 0x4E3F73F: ??? (in /lib64/libc-2.12.so)
==49780==
==49780== Conditional jump or move depends on uninitialised value(s)
==49780== at 0x4F58D3C: ??? (in /lib64/libc-2.12.so)
==49780== by 0x9F8E5D7: ???
==49780== by 0x422200F: ???
==49780== by 0xFFEFFF387: ???
==49780== by 0xFFEFFF37F: ???
==49780== by 0xFFEFFF477: ???
==49780== by 0x1D: ???
==49780== by 0x9D7CD90: ??? (in /lib64/libselinux.so.1)
==49780== by 0xC1: ???
==49780== by 0xFFEFFF33D: ???
==49780== by 0xEF52: ???
==49780== by 0xFFF: ???
==49780== Uninitialised value was created
==49780== at 0x4F0F91A: ??? (in /lib64/libc-2.12.so)
==49780== by 0x4F0F9C4: ??? (in /lib64/libc-2.12.so)
==49780== by 0x51BDE7F: ???
==49780== by 0x51BDED7: ???
==49780== by 0x51BDED7: ???
==49780== by 0x4EAC918: ??? (in /lib64/libc-2.12.so)
==49780== by 0x23F: ???
==49780== by 0x4EA9029: ??? (in /lib64/libc-2.12.so)
==49780== by 0x566704E3E3A7: ???
==49780== by 0x237: ???
==49780== by 0x20FFF: ???
==49780== by 0x4E3F73F: ??? (in /lib64/libc-2.12.so)
==49780==
==49780== Conditional jump or move depends on uninitialised value(s)
==49780== at 0x4F5976F: ??? (in /lib64/libc-2.12.so)
==49780== by 0x9F8E5D7: ???
==49780== by 0x422200F: ???
==49780== by 0xFFEFFF387: ???
==49780== by 0xFFEFFF37F: ???
==49780== by 0xFFEFFF477: ???
==49780== by 0x1D: ???
==49780== by 0x9D7CD90: ??? (in /lib64/libselinux.so.1)
==49780== by 0xC1: ???
==49780== by 0xFFEFFF33D: ???
==49780== by 0xEF52: ???
==49780== by 0xFFF: ???
==49780== Uninitialised value was created
==49780== at 0x4F0F91A: ??? (in /lib64/libc-2.12.so)
==49780== by 0x4F0F9C4: ??? (in /lib64/libc-2.12.so)
==49780== by 0x51BDE7F: ???
==49780== by 0x51BDED7: ???
==49780== by 0x51BDED7: ???
==49780== by 0x4EAC918: ??? (in /lib64/libc-2.12.so)
==49780== by 0x23F: ???
==49780== by 0x4EA9029: ??? (in /lib64/libc-2.12.so)
==49780== by 0x566704E3E3A7: ???
==49780== by 0x237: ???
==49780== by 0x20FFF: ???
==49780== by 0x4E3F73F: ??? (in /lib64/libc-2.12.so)
==49780==
==49780== Conditional jump or move depends on uninitialised value(s)
==49780== at 0x4F597EC: ??? (in /lib64/libc-2.12.so)
==49780== by 0x9F8E5D7: ???
==49780== by 0x422200F: ???
==49780== by 0xFFEFFF387: ???
==49780== by 0xFFEFFF37F: ???
==49780== by 0xFFEFFF477: ???
==49780== by 0x1D: ???
==49780== by 0x9D7CD90: ??? (in /lib64/libselinux.so.1)
==49780== by 0xC1: ???
==49780== by 0xFFEFFF33D: ???
==49780== by 0xEF52: ???
==49780== by 0xFFF: ???
==49780== Uninitialised value was created
==49780== at 0x4F0F91A: ??? (in /lib64/libc-2.12.so)
==49780== by 0x4F0F9C4: ??? (in /lib64/libc-2.12.so)
==49780== by 0x51BDE7F: ???
==49780== by 0x51BDED7: ???
==49780== by 0x51BDED7: ???
==49780== by 0x4EAC918: ??? (in /lib64/libc-2.12.so)
==49780== by 0x23F: ???
==49780== by 0x4EA9029: ??? (in /lib64/libc-2.12.so)
==49780== by 0x566704E3E3A7: ???
==49780== by 0x237: ???
==49780== by 0x20FFF: ???
==49780== by 0x4E3F73F: ??? (in /lib64/libc-2.12.so)
==49780==
==49780== Conditional jump or move depends on uninitialised value(s)
==49780== at 0x4F5939A: ??? (in /lib64/libc-2.12.so)
==49780== by 0x9F8E5D7: ???
==49780== by 0x422200F: ???
==49780== by 0xFFEFFF387: ???
==49780== by 0xFFEFFF37F: ???
==49780== by 0xFFEFFF477: ???
==49780== by 0x1D: ???
==49780== by 0x9D7CD90: ??? (in /lib64/libselinux.so.1)
==49780== by 0xC1: ???
==49780== by 0xFFEFFF33D: ???
==49780== by 0xEF52: ???
==49780== by 0xFFF: ???
==49780== Uninitialised value was created
==49780== at 0x4F0F91A: ??? (in /lib64/libc-2.12.so)
==49780== by 0x4F0F9C4: ??? (in /lib64/libc-2.12.so)
==49780== by 0x51BDE7F: ???
==49780== by 0x51BDED7: ???
==49780== by 0x51BDED7: ???
==49780== by 0x4EAC918: ??? (in /lib64/libc-2.12.so)
==49780== by 0x23F: ???
==49780== by 0x4EA9029: ??? (in /lib64/libc-2.12.so)
==49780== by 0x566704E3E3A7: ???
==49780== by 0x237: ???
==49780== by 0x20FFF: ???
==49780== by 0x4E3F73F: ??? (in /lib64/libc-2.12.so)
==49780==
==49780== Conditional jump or move depends on uninitialised value(s)
==49780== at 0x4F597E4: ??? (in /lib64/libc-2.12.so)
==49780== by 0x9F8E5D7: ???
==49780== by 0x422200F: ???
==49780== by 0xFFEFFF387: ???
==49780== by 0xFFEFFF37F: ???
==49780== by 0xFFEFFF477: ???
==49780== by 0x1D: ???
==49780== by 0x9D7CD90: ??? (in /lib64/libselinux.so.1)
==49780== by 0xC1: ???
==49780== by 0xFFEFFF33D: ???
==49780== by 0xEF52: ???
==49780== by 0xFFF: ???
==49780== Uninitialised value was created
==49780== at 0x4F0F91A: ??? (in /lib64/libc-2.12.so)
==49780== by 0x4F0F9C4: ??? (in /lib64/libc-2.12.so)
==49780== by 0x51BDE7F: ???
==49780== by 0x51BDED7: ???
==49780== by 0x51BDED7: ???
==49780== by 0x4EAC918: ??? (in /lib64/libc-2.12.so)
==49780== by 0x23F: ???
==49780== by 0x4EA9029: ??? (in /lib64/libc-2.12.so)
==49780== by 0x566704E3E3A7: ???
==49780== by 0x237: ???
==49780== by 0x20FFF: ???
==49780== by 0x4E3F73F: ??? (in /lib64/libc-2.12.so)
==49780==
==49780== Conditional jump or move depends on uninitialised value(s)
==49780== at 0x4F597E8: ??? (in /lib64/libc-2.12.so)
==49780== by 0x9F8E5D7: ???
==49780== by 0x422200F: ???
==49780== by 0xFFEFFF387: ???
==49780== by 0xFFEFFF37F: ???
==49780== by 0xFFEFFF477: ???
==49780== by 0x1D: ???
==49780== by 0x9D7CD90: ??? (in /lib64/libselinux.so.1)
==49780== by 0xC1: ???
==49780== by 0xFFEFFF33D: ???
==49780== by 0xEF52: ???
==49780== by 0xFFF: ???
==49780== Uninitialised value was created
==49780== at 0x4F0F91A: ??? (in /lib64/libc-2.12.so)
==49780== by 0x4F0F9C4: ??? (in /lib64/libc-2.12.so)
==49780== by 0x51BDE7F: ???
==49780== by 0x51BDED7: ???
==49780== by 0x51BDED7: ???
==49780== by 0x4EAC918: ??? (in /lib64/libc-2.12.so)
==49780== by 0x23F: ???
==49780== by 0x4EA9029: ??? (in /lib64/libc-2.12.so)
==49780== by 0x566704E3E3A7: ???
==49780== by 0x237: ???
==49780== by 0x20FFF: ???
==49780== by 0x4E3F73F: ??? (in /lib64/libc-2.12.so)
==49780==
==49780== Conditional jump or move depends on uninitialised value(s)
==49780== at 0x4EB037B: ??? (in /lib64/libc-2.12.so)
==49780== by 0x636F: ???
==49780== Uninitialised value was created by a stack allocation
==49780== at 0x88DB3FB: ??? (in /usr/lib64/libinfinipath.so.4.0)
==49780==
==49780== Conditional jump or move depends on uninitialised value(s)
==49780== at 0x4EB9C7E: ??? (in /lib64/libc-2.12.so)
==49780== by 0xA30203A0971: ???
==49780== by 0x8AE4FFF: ??? (in /usr/lib64/libinfinipath.so.4.0)
==49780== by 0x8DECBCF: ???
==49780== by 0x8DD483F: ??? (in /opt/gnu/gcc/4.7.2/lib64/libstdc++.so.6.0.17)
==49780== by 0x8DD1C8F: ??? (in /opt/gnu/gcc/4.7.2/lib64/libstdc++.so.6.0.17)
==49780== Uninitialised value was created by a stack allocation
==49780== at 0x679F8FB: ??? (in /opt/mellanox/mxm/lib/libmxm.so.0.0.0)
==49780==
==49780== Conditional jump or move depends on uninitialised value(s)
==49780== at 0x4EB9C93: ??? (in /lib64/libc-2.12.so)
==49780== by 0x68747541203A0963: ???
==49780== by 0x444D416369746E64: ???
==49780== by 0x8DE0009: ???
==49780== by 0x8DD483F: ??? (in /opt/gnu/gcc/4.7.2/lib64/libstdc++.so.6.0.17)
==49780== by 0x8DD1C8F: ??? (in /opt/gnu/gcc/4.7.2/lib64/libstdc++.so.6.0.17)
==49780== Uninitialised value was created by a stack allocation
==49780== at 0x679F8FB: ??? (in /opt/mellanox/mxm/lib/libmxm.so.0.0.0)
==49780==
==49780== Conditional jump or move depends on uninitialised value(s)
==49780== at 0x4EB9C93: ??? (in /lib64/libc-2.12.so)
==49780== by 0xA3132203A09796B: ???
==49780== by 0x444D416369746DFF: ???
==49780== by 0x8DE0009: ???
==49780== by 0x8DD483F: ??? (in /opt/gnu/gcc/4.7.2/lib64/libstdc++.so.6.0.17)
==49780== by 0x8DD1C8F: ??? (in /opt/gnu/gcc/4.7.2/lib64/libstdc++.so.6.0.17)
==49780== Uninitialised value was created by a stack allocation
==49780== at 0x679F8FB: ??? (in /opt/mellanox/mxm/lib/libmxm.so.0.0.0)
==49780==
==49780== Conditional jump or move depends on uninitialised value(s)
==49780== at 0x4EB9C93: ??? (in /lib64/libc-2.12.so)
==49780== by 0x444D41203A09656C: ???
==49780== by 0x6E6F726574704F1F: ???
==49780== by 0x6F725020296D7427: ???
==49780== by 0x3620726F73736562: ???
==49780== by 0x2020202020383732: ???
==49780== by 0x202020202020201F: ???
==49780== by 0xA2020201F: ???
==49780== by 0x8DD3C3F: ??? (in /opt/gnu/gcc/4.7.2/lib64/libstdc++.so.6.0.17)
==49780== by 0x8B4272C: ??? (in /opt/gnu/gcc/4.7.2/lib64/libstdc++.so.6.0.17)
==49780== by 0x8DECBCF: ???
==49780== by 0xFFEFFF2BF: ???
==49780== Uninitialised value was created by a stack allocation
==49780== at 0x679F8FB: ??? (in /opt/mellanox/mxm/lib/libmxm.so.0.0.0)
==49780==
==49780== Warning: ignored attempt to set SIGKILL handler in sigaction();
==49780== the SIGKILL signal is uncatchable
Hello world
==49780==
==49780== HEAP SUMMARY:
==49780== in use at exit: 0 bytes in 0 blocks
==49780== total heap usage: 0 allocs, 0 frees, 0 bytes allocated
==49780==
==49780== All heap blocks were freed -- no leaks are possible
==49780==
==49780== For counts of detected and suppressed errors, rerun with: -v
==49780== ERROR SUMMARY: 54 errors from 12 contexts (suppressed: 6 from 6)
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