Valgrind output readable for human beings
With Valgreen:
With Valgrind:
As simple as pip3 install valgreen. Keep in mind you need a working Valgrind installation!
Just write valgreen ./exec instead of valgrind --leak-check=full --track-origins=yes --show-reachable=yes ./exec
Valgreen vs Valgrind output
$ gcc -g example.c -o example
$ valgreen ./example
1) Conditional jump or move depends on uninitialised value(s)
at main (example.c:8)
Uninitialised value was created by a stack allocation
at main (example.c:4)
2) Invalid write of size 1
at main (example.c:12)
Address 0x522d042 is 0 bytes after a block of size 2 alloc'd
at malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
by main (example.c:11)
3) Invalid read of size 1
at main (example.c:15)
Address 0x522d045 is 3 bytes after a block of size 2 alloc'd
at malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
by main (example.c:11)
4) Invalid free() / delete / delete[] / realloc()
at free (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
by main (example.c:19)
Address 0x522d040 is 0 bytes inside a block of size 2 free'd
at free (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
by main (example.c:18)
Block was alloc'd at
at malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
by main (example.c:11)
5) 100 bytes in 1 blocks are definitely lost in loss record 1 of 1
at malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
by main (example.c:22)
$ valgrind --leak-check=full --track-origins=yes --show-reachable=yes ./example
==7750== Memcheck, a memory error detector
==7750== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==7750== Using Valgrind-3.13.0 and LibVEX; rerun with -h for copyright info
==7750== Command: ./example
==7750==
==7750== Conditional jump or move depends on uninitialised value(s)
==7750== at 0x108696: main (example.c:8)
==7750== Uninitialised value was created by a stack allocation
==7750== at 0x10868A: main (example.c:4)
==7750==
==7750== Invalid write of size 1
==7750== at 0x1086B5: main (example.c:12)
==7750== Address 0x522d042 is 0 bytes after a block of size 2 alloc'd
==7750== at 0x4C2FB0F: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==7750== by 0x1086A8: main (example.c:11)
==7750==
==7750== Invalid read of size 1
==7750== at 0x1086BC: main (example.c:15)
==7750== Address 0x522d045 is 3 bytes after a block of size 2 alloc'd
==7750== at 0x4C2FB0F: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==7750== by 0x1086A8: main (example.c:11)
==7750==
==7750== Invalid free() / delete / delete[] / realloc()
==7750== at 0x4C30D3B: free (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==7750== by 0x1086DA: main (example.c:19)
==7750== Address 0x522d040 is 0 bytes inside a block of size 2 free'd
==7750== at 0x4C30D3B: free (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==7750== by 0x1086CE: main (example.c:18)
==7750== Block was alloc'd at
==7750== at 0x4C2FB0F: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==7750== by 0x1086A8: main (example.c:11)
==7750==
==7750==
==7750== HEAP SUMMARY:
==7750== in use at exit: 100 bytes in 1 blocks
==7750== total heap usage: 2 allocs, 2 frees, 102 bytes allocated
==7750==
==7750== 100 bytes in 1 blocks are definitely lost in loss record 1 of 1
==7750== at 0x4C2FB0F: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==7750== by 0x1086E4: main (example.c:22)
==7750==
==7750== LEAK SUMMARY:
==7750== definitely lost: 100 bytes in 1 blocks
==7750== indirectly lost: 0 bytes in 0 blocks
==7750== possibly lost: 0 bytes in 0 blocks
==7750== still reachable: 0 bytes in 0 blocks
==7750== suppressed: 0 bytes in 0 blocks
==7750==
==7750== For counts of detected and suppressed errors, rerun with: -v
==7750== ERROR SUMMARY: 5 errors from 5 contexts (suppressed: 0 from 0)