Package: valgrind Version: 1:3.2.0-2 Severity: normal Hi.
I have just recompiled fftw3 using ---enable-altivec to enable the altivec optimisation (see #225959). On a program that passed valgrind with no single error before, I now get the following result: ~/aubio/examples/tests $ valgrind .libs/lt-test-mfft ==23363== Memcheck, a memory error detector. ==23363== Copyright (C) 2002-2006, and GNU GPL'd, by Julian Seward et al. ==23363== Using LibVEX rev 1606, a library for dynamic binary translation. ==23363== Copyright (C) 2004-2006, and GNU GPL'd, by OpenWorks LLP. ==23363== Using valgrind-3.2.0-Debian, a dynamic binary instrumentation framework. ==23363== Copyright (C) 2000-2006, and GNU GPL'd, by Julian Seward et al. ==23363== For more details, rerun with: -v ==23363== ==23363== Invalid read of size 8 ==23363== at 0xFF06BF0: n1fv_64 (simd-altivec.h:79) ==23363== by 0xFE5FD70: apply (direct.c:107) ==23363== by 0xFE5D678: apply_dit (ct.c:41) ==23363== by 0xFEA0AC8: apply_f_dft (rdft2-radix2.c:157) ==23363== by 0xFEA022C: fftwf_rdft2_solve (solve2.c:30) ==23363== by 0xFEF8FC4: fftwf_execute (execute.c:24) ==23363== by 0xFF9F124: aubio_fft_do (fft.c:76) ==23363== by 0xFF9F21C: aubio_mfft_do (fft.c:128) ==23363== by 0x10001714: main (test-mfft.c:16) ==23363== Address 0x44E28C0 is 8 bytes before a block of size 16,384 alloc'd ==23363== at 0xFFBBA78: malloc (vg_replace_malloc.c:149) ==23363== by 0xFF9F3C4: new_aubio_fft (fft.c:52) ==23363== by 0xFF9F488: new_aubio_mfft (fft.c:116) ==23363== by 0x10001704: main (test-mfft.c:12) ==23363== ==23363== Invalid read of size 4 ==23363== at 0xFF09ADC: n1fv_64 (simd-altivec.h:147) ==23363== by 0xFE5FD70: apply (direct.c:107) ==23363== by 0xFE5D678: apply_dit (ct.c:41) ==23363== by 0xFEA0AC8: apply_f_dft (rdft2-radix2.c:157) ==23363== by 0xFEA022C: fftwf_rdft2_solve (solve2.c:30) ==23363== by 0xFEF8FC4: fftwf_execute (execute.c:24) ==23363== by 0xFF9F124: aubio_fft_do (fft.c:76) ==23363== by 0xFF9F21C: aubio_mfft_do (fft.c:128) ==23363== by 0x10001714: main (test-mfft.c:16) ==23363== Address 0x0 is not stack'd, malloc'd or (recently) free'd ==23363== ==23363== Process terminating with default action of signal 11 (SIGSEGV) ==23363== Access not within mapped region at address 0x0 ==23363== at 0xFF09ADC: n1fv_64 (simd-altivec.h:147) ==23363== by 0xFE5FD70: apply (direct.c:107) ==23363== by 0xFE5D678: apply_dit (ct.c:41) ==23363== by 0xFEA0AC8: apply_f_dft (rdft2-radix2.c:157) ==23363== by 0xFEA022C: fftwf_rdft2_solve (solve2.c:30) ==23363== by 0xFEF8FC4: fftwf_execute (execute.c:24) ==23363== by 0xFF9F124: aubio_fft_do (fft.c:76) ==23363== by 0xFF9F21C: aubio_mfft_do (fft.c:128) ==23363== by 0x10001714: main (test-mfft.c:16) ==23363== ==23363== ERROR SUMMARY: 2 errors from 2 contexts (suppressed: 6 from 2) ==23363== malloc/free: in use at exit: 8,333,056 bytes in 1,144 blocks. ==23363== malloc/free: 2,566 allocs, 1,422 frees, 8,474,960 bytes allocated. ==23363== For counts of detected errors, rerun with: -v ==23363== searching for pointers to 1,144 not-freed blocks. ==23363== checked 5,409,404 bytes. ==23363== ==23363== LEAK SUMMARY: ==23363== definitely lost: 0 bytes in 0 blocks. ==23363== possibly lost: 0 bytes in 0 blocks. ==23363== still reachable: 8,333,056 bytes in 1,144 blocks. ==23363== suppressed: 0 bytes in 0 blocks. ==23363== Reachable blocks (those to which a pointer was found) are not shown. ==23363== To see them, rerun with: --show-reachable=yes Segmentation fault The corresponding lines in simd-altivec.h all contain a call to the `vec_perm' function, which seem to be defined in gcc as: $ grep vec_perm /usr/lib/gcc/powerpc-linux-gnu/4.1.2/include/altivec.h #define vec_vperm vec_perm #define vec_perm __builtin_vec_perm The test program is available as a baz archive here: http://aubio.piem.org/bazaar/[EMAIL PROTECTED] Cheers, Paul -- System Information: Debian Release: testing/unstable APT prefers unstable APT policy: (500, 'unstable'), (1, 'experimental') Architecture: powerpc (ppc) Shell: /bin/sh linked to /bin/bash Kernel: Linux 2.6.17-1-powerpc Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8) Versions of packages valgrind depends on: ii libc6 2.3.6-16 GNU C Library: Shared libraries Versions of packages valgrind recommends: ii gdb 6.4.90.dfsg-1 The GNU Debugger -- no debconf information -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
