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https://github.com/Zenithsiz/ftmemsim-valgrind.git
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--fill-free=<hexnumber>, which cause malloc'd(etc) and free'd(etc) blocks to be filled with the specified value. This can apparently be useful for shaking out hard-to-track-down memory corruption. The definedness/addressability of said areas is not affected -- only the contents. Documentation to follow. git-svn-id: svn://svn.valgrind.org/valgrind/trunk@7259
58 lines
2.0 KiB
Plaintext
58 lines
2.0 KiB
Plaintext
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test simple malloc/free:
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Use of uninitialised value of size 8
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at 0x........: _itoa_word (in /...libc...)
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by 0x........: ...
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by 0x........: ...
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by 0x........: ...
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by 0x........: ...
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by 0x........: main (malloc_free_fill.c:17)
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Conditional jump or move depends on uninitialised value(s)
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at 0x........: _itoa_word (in /...libc...)
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by 0x........: ...
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by 0x........: ...
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by 0x........: ...
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by 0x........: ...
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by 0x........: main (malloc_free_fill.c:17)
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Conditional jump or move depends on uninitialised value(s)
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at 0x........: vfprintf (in /...libc...)
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by 0x........: ...
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by 0x........: ...
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by 0x........: ...
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by 0x........: main (malloc_free_fill.c:17)
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(should be malloc-filled) a[4] = 55555555
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Invalid read of size 4
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at 0x........: main (malloc_free_fill.c:20)
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Address 0x........ is 20 bytes inside a block of size 40 free'd
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at 0x........: free (vg_replace_malloc.c:...)
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by 0x........: main (malloc_free_fill.c:19)
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(should be free-filled) a[5] = 77777777
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test realloc-larger:
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(should be malloc-filled) r[25] = 55555555
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Invalid read of size 4
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at 0x........: main (malloc_free_fill.c:33)
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Address 0x........ is 104 bytes inside a block of size 120 free'd
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at 0x........: realloc (vg_replace_malloc.c:...)
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by 0x........: main (malloc_free_fill.c:31)
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(should be free-filled) oldr[26] = 77777777
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(should be malloc-filled) r[35] = 55555555
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test realloc-smaller:
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(should be malloc-filled) r[25] = 55555555
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Invalid read of size 4
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at 0x........: main (malloc_free_fill.c:49)
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Address 0x........ is not stack'd, malloc'd or (recently) free'd
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(should be free-filled) oldr[26] = 77777777
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test calloc:
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(should be zero) a[42] = 0
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ERROR SUMMARY: 67 errors from 6 contexts (suppressed: 0 from 0)
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malloc/free: in use at exit: 0 bytes in 0 blocks.
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malloc/free: 6 allocs, 6 frees, 920 bytes allocated.
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For a detailed leak analysis, rerun with: --leak-check=yes
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For counts of detected errors, rerun with: -v
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