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g77 and valgrind error?
- From: <bvds at bvds dot geneva dot edu>
- To: gcc-help at gcc dot gnu dot org
- Cc: bvds at bvds dot geneva dot edu
- Date: Fri, 6 Aug 2004 15:27:52 -0400
- Subject: g77 and valgrind error?
I am using valgrind on a g77 program and am getting
some peculiar results:
Cccccccccccccccccccccccccccccccccccccccccc
program memty
integer i
i=360
call fsub(i)
end
C
subroutine fsub(i)
integer i
double complex x(i,i)
x(i,i)=complex(0D0,0D0)
end
Ccccccccccccccccccccccccccccccccccccccccc
Valgrind gives an error of the form:
==12420== Invalid write of size 8
==12420== at 0x8048671: fsub_ (memty.f:10)
==12420== by 0x80486C5: main (../../../../gcc-3.1/libf2c/libF77/main.c:61)
==12420== Address 0x52BFE8A0 is on thread 1's stack
==12420==
==12420== Invalid write of size 8
==12420== at 0x8048679: fsub_ (memty.f:10)
==12420== by 0x80486C5: main (../../../../gcc-3.1/libf2c/libF77/main.c:61)
==12420== Address 0x52BFE8A8 is on thread 1's stack
Some more info:
bvds> uname -a
Linux bvds 2.4.25 #1 SMP Sat Mar 20 15:34:02 EST 2004 i686 i686 i386 GNU/Linux
bvds> g77 --version
GNU Fortran (GCC) 3.3.2
bvds> valgrind --version
valgrind-2.1.2
I see the same behavior in valgrind-2.0.0.
This only happens for complex arrays.
if I use the g77 flag -femulate-complex, then there is one error.
(I have also sent this to the valgrind mailing list.)
Any ideas?
Brett van de Sande