Re: [Plplot-devel] valgrind [purify killer]

[Joao C. <jc...@fe...>]

On Wednesday 27 February 2002 4:31 pm, Geoffrey Furnish wrote:
> Joao Cardoso writes:
>  > While reading the valgrind docs, it looks like that it's output is
>  > very verbose. In your experience can this be a problem? 500 errors t=
o
>  > parse :-x
>
> valgrind gives you one block of errors for each "context", and
> multiple occurrences of an error in a context result in no additional
> printings of that context block during the program run.  Then at the
> end, it summarizes activity in each context.  So no, 500 errors is not
> that bad, because its only a few contexts, with a few lines each.
> Again, if you've used purify, this will look very familiar.

Ah, 50, not 500 (possible) errors, and only on 3 contexts, related with t=
he=20
same line of code! which does look OK...
I will investigate it latter.

Thanks,
Joao

> For example, here's the error output for x08c:
>
> [furnish@xiphi tmp2]$ valgrind x08c -dev xwin
> =3D=3D7932=3D=3D valgrind-20020224, a memory error detector for x86 GNU=
/Linux.
> =3D=3D7932=3D=3D Copyright (C) 2000-2002, and GNU GPL'd, by Julian Sewa=
rd.
> =3D=3D7932=3D=3D For more details, rerun with: -v
> =3D=3D7932=3D=3D
> =3D=3D7932=3D=3D Use of uninitialised value of size 4
> =3D=3D7932=3D=3D    at 0x402C3582: plnxtvhi_draw (plot3d.c:826)
> =3D=3D7932=3D=3D    by 0x402C34E8: plnxtvhi (plot3d.c:793)
> =3D=3D7932=3D=3D    by 0x402C32F9: plnxtv (plot3d.c:725)
> =3D=3D7932=3D=3D    by 0x402C1EE3: plt3zz (plot3d.c:499)
> =3D=3D7932=3D=3D
> =3D=3D7932=3D=3D Use of uninitialised CPU condition code
> =3D=3D7932=3D=3D    at 0x402C35B2: plnxtvhi_draw (plot3d.c:837)
> =3D=3D7932=3D=3D    by 0x402C34E8: plnxtvhi (plot3d.c:793)
> =3D=3D7932=3D=3D    by 0x402C32F9: plnxtv (plot3d.c:725)
> =3D=3D7932=3D=3D    by 0x402C1EE3: plt3zz (plot3d.c:499)
> =3D=3D7932=3D=3D
> =3D=3D7932=3D=3D Use of uninitialised value of size 4
> =3D=3D7932=3D=3D    at 0x402C4AD6: pl3cut (plot3d.c:1563)
> =3D=3D7932=3D=3D    by 0x402C3A96: plnxtvhi_draw (plot3d.c:949)
> =3D=3D7932=3D=3D    by 0x402C34E8: plnxtvhi (plot3d.c:793)
> =3D=3D7932=3D=3D    by 0x402C32F9: plnxtv (plot3d.c:725)
> =3D=3D7932=3D=3D
> =3D=3D7932=3D=3D Use of uninitialised value of size 4
> =3D=3D7932=3D=3D    at 0x402C4B2F: pl3cut (plot3d.c:1574)
> =3D=3D7932=3D=3D    by 0x402C3A96: plnxtvhi_draw (plot3d.c:949)
> =3D=3D7932=3D=3D    by 0x402C34E8: plnxtvhi (plot3d.c:793)
> =3D=3D7932=3D=3D    by 0x402C32F9: plnxtv (plot3d.c:725)
> =3D=3D7932=3D=3D
> =3D=3D7932=3D=3D Use of uninitialised CPU condition code
> =3D=3D7932=3D=3D    at 0x402C4B35: pl3cut (plot3d.c:1575)
> =3D=3D7932=3D=3D    by 0x402C3A96: plnxtvhi_draw (plot3d.c:949)
> =3D=3D7932=3D=3D    by 0x402C34E8: plnxtvhi (plot3d.c:793)
> =3D=3D7932=3D=3D    by 0x402C32F9: plnxtv (plot3d.c:725)
> =3D=3D7932=3D=3D
> =3D=3D7932=3D=3D Use of uninitialised value of size 4
> =3D=3D7932=3D=3D    at 0x402C4B87: pl3cut (plot3d.c:1588)
> =3D=3D7932=3D=3D    by 0x402C3A96: plnxtvhi_draw (plot3d.c:949)
> =3D=3D7932=3D=3D    by 0x402C34E8: plnxtvhi (plot3d.c:793)
> =3D=3D7932=3D=3D    by 0x402C32F9: plnxtv (plot3d.c:725)
> =3D=3D7932=3D=3D
> =3D=3D7932=3D=3D Use of uninitialised value of size 4
> =3D=3D7932=3D=3D    at 0x402C3582: plnxtvhi_draw (plot3d.c:826)
> =3D=3D7932=3D=3D    by 0x402C34E8: plnxtvhi (plot3d.c:793)
> =3D=3D7932=3D=3D    by 0x402C32F9: plnxtv (plot3d.c:725)
> =3D=3D7932=3D=3D    by 0x402C2C41: plgrid3 (plot3d.c:640)
> =3D=3D7932=3D=3D
> =3D=3D7932=3D=3D Use of uninitialised CPU condition code
> =3D=3D7932=3D=3D    at 0x402C35B2: plnxtvhi_draw (plot3d.c:837)
> =3D=3D7932=3D=3D    by 0x402C34E8: plnxtvhi (plot3d.c:793)
> =3D=3D7932=3D=3D    by 0x402C32F9: plnxtv (plot3d.c:725)
> =3D=3D7932=3D=3D    by 0x402C2C41: plgrid3 (plot3d.c:640)
> =3D=3D7932=3D=3D
> =3D=3D7932=3D=3D Use of uninitialised value of size 4
> =3D=3D7932=3D=3D    at 0x402C1C8C: plt3zz (plot3d.c:463)
> =3D=3D7932=3D=3D    by 0x402C0BF8: c_plotsh3d (plot3d.c:159)
> =3D=3D7932=3D=3D    by 0x8048F28: main (x08c.c:113)
> =3D=3D7932=3D=3D    by 0x406D5627: __libc_start_main
> (../sysdeps/generic/libc-start.c:129)
> =3D=3D7932=3D=3D
> =3D=3D7932=3D=3D Invalid read of size 4
> =3D=3D7932=3D=3D    at 0x402C35AC: plnxtvhi_draw (plot3d.c:837)
> =3D=3D7932=3D=3D    by 0x402C34E8: plnxtvhi (plot3d.c:793)
> =3D=3D7932=3D=3D    by 0x402C32F9: plnxtv (plot3d.c:725)
> =3D=3D7932=3D=3D    by 0x402C1EE3: plt3zz (plot3d.c:499)
> =3D=3D7932=3D=3D    Address 0x4164BE20 is 0 bytes after a block of size=
 24
> alloc'd
> =3D=3D7932=3D=3D    at 0x4005745E: malloc (vg_clientmalloc.c:590)
> =3D=3D7932=3D=3D    by 0x402C335B: plnxtvhi (plot3d.c:746)
> =3D=3D7932=3D=3D    by 0x402C32F9: plnxtv (plot3d.c:725)
> =3D=3D7932=3D=3D    by 0x402C1EE3: plt3zz (plot3d.c:499)
> =3D=3D7932=3D=3D
> =3D=3D7932=3D=3D Invalid read of size 4
> =3D=3D7932=3D=3D    at 0x402C35AC: plnxtvhi_draw (plot3d.c:837)
> =3D=3D7932=3D=3D    by 0x402C34E8: plnxtvhi (plot3d.c:793)
> =3D=3D7932=3D=3D    by 0x402C32F9: plnxtv (plot3d.c:725)
> =3D=3D7932=3D=3D    by 0x402C1EE3: plt3zz (plot3d.c:499)
> =3D=3D7932=3D=3D    Address 0x41664284 is 0 bytes after a block of size=
 376
> alloc'd
> =3D=3D7932=3D=3D    at 0x4005745E: malloc (vg_clientmalloc.c:590)
> =3D=3D7932=3D=3D    by 0x402C335B: plnxtvhi (plot3d.c:746)
> =3D=3D7932=3D=3D    by 0x402C32F9: plnxtv (plot3d.c:725)
> =3D=3D7932=3D=3D    by 0x402C1EE3: plt3zz (plot3d.c:499)
> =3D=3D7932=3D=3D
> =3D=3D7932=3D=3D Use of uninitialised value of size 4
> =3D=3D7932=3D=3D    at 0x402C3582: plnxtvhi_draw (plot3d.c:826)
> =3D=3D7932=3D=3D    by 0x402C34E8: plnxtvhi (plot3d.c:793)
> =3D=3D7932=3D=3D    by 0x402C32F9: plnxtv (plot3d.c:725)
> =3D=3D7932=3D=3D    by 0x402C2E61: plgrid3 (plot3d.c:658)
> =3D=3D7932=3D=3D
> =3D=3D7932=3D=3D Use of uninitialised CPU condition code
> =3D=3D7932=3D=3D    at 0x402C35B2: plnxtvhi_draw (plot3d.c:837)
> =3D=3D7932=3D=3D    by 0x402C34E8: plnxtvhi (plot3d.c:793)
> =3D=3D7932=3D=3D    by 0x402C32F9: plnxtv (plot3d.c:725)
> =3D=3D7932=3D=3D    by 0x402C2E61: plgrid3 (plot3d.c:658)
> =3D=3D7932=3D=3D
> =3D=3D7932=3D=3D Use of uninitialised value of size 4
> =3D=3D7932=3D=3D    at 0x402C1C8C: plt3zz (plot3d.c:463)
> =3D=3D7932=3D=3D    by 0x402C0CE9: c_plotsh3d (plot3d.c:164)
> =3D=3D7932=3D=3D    by 0x8048F28: main (x08c.c:113)
> =3D=3D7932=3D=3D    by 0x406D5627: __libc_start_main
> (../sysdeps/generic/libc-start.c:129)
> =3D=3D7932=3D=3D
> =3D=3D7932=3D=3D ERROR SUMMARY: 5079 errors from 14 contexts (suppresse=
d: 16
> from 1)
> =3D=3D7932=3D=3D malloc/free: in use at exit: 9184 bytes in 69 blocks.
> =3D=3D7932=3D=3D malloc/free: 765 allocs, 696 frees, 878849 bytes alloc=
ated.
> =3D=3D7932=3D=3D For a detailed leak analysis,  rerun with: --leak-chec=
k=3Dyes
> =3D=3D7932=3D=3D For counts of detected errors, rerun with: -v
> [furnish@xiphi tmp2]$