Hi Thanks for your bug report ,but this isn't a bug in the code,see this thread here for the reason , perhaps you can set Valgrind to ignore this type of thing , either that or just delete the two offending asm files
http://groups.google.com/group/mpir- devel/browse_thread/thread/f60bcb31a828f03f/5b04ea24a10f7149?lnk=gst&q=core2+valgrind#5b04ea24a10f7149 Thanks Jason ---------- Forwarded Message ---------- Subject: Bug in Core 2 Assembler Code Date: Tuesday, August 30, 2011, 11:56:34 pm From: Tobias Jeske <tobias.je...@tu-harburg.de> To: thempirt...@gmail.com Hi all, Valgrind reports some errors in my project. After having a closer look I have found out that there seams to be a bug in the MPIR 2.4.0 Core 2 Assembler optimization code. I have made a short example containing the bug (see code below). This is what I have done to reproduce the bug... - configured, compiled and installed MPIR on my laptop with a Core 2 CPU running Ubuntu 11.04 x64 - ./configure && make -j4 && sudo make install - compiled example gcc main.c -o main -lmpir - running Valgrind: valgrind ./main I get: ==3527== Memcheck, a memory error detector ==3527== Copyright (C) 2002-2010, and GNU GPL'd, by Julian Seward et al. ==3527== Using Valgrind-3.6.1 and LibVEX; rerun with -h for copyright info ==3527== Command: ./main ==3527== a: 1 b: 2 c: 3 ==3527== Invalid read of size 8 ==3527== at 0x4E8DFCD: __gmpn_copyi (in /usr/local/lib/libmpir.so.7.4.0) ==3527== by 0x4007EC: main (in /home/.../mpir-2.4.0-bug/main) ==3527== Address 0x543d098 is 0 bytes after a block of size 8 alloc'd ==3527== at 0x4C28FAC: malloc (vg_replace_malloc.c:236) ==3527== by 0x4E3B348: __gmp_default_allocate (in /usr/local/lib/libmpir.so.7.4.0) ==3527== by 0x4E4AC77: __gmpz_init (in /usr/local/lib/libmpir.so.7.4.0) ==3527== by 0x400753: main (in /home/.../mpir-2.4.0-bug/main) ==3527== a: 1 ==3527== ==3527== HEAP SUMMARY: ==3527== in use at exit: 0 bytes in 0 blocks ==3527== total heap usage: 12 allocs, 12 frees, 72 bytes allocated ==3527== ==3527== All heap blocks were freed -- no leaks are possible ==3527== ==3527== For counts of detected and suppressed errors, rerun with: -v ==3527== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 4 from 4) - using MPIRs general C Code implementations ./configure --host=none && make -j4 && sudo make install gcc main.c -o main -lmpir valgrind ./main -> no errors... If I choose higher numbers for a, b, c in the example program and MPIR 2.4.0 + Core 2 Assembler optimisations, Valgrind also reports no errors... Cheers, Tobi ---------- #include <mpir.h> void main() { mpz_t a; mpz_t b; mpz_t c; mpz_init(a); mpz_init(b); mpz_init(c); mpz_set_ui(a, 1); mpz_set_ui(b, 2); mpz_set_ui(c, 3); gmp_printf("a: %Zd\n", a); gmp_printf("b: %Zd\n", b); gmp_printf("c: %Zd\n", c); mpz_powm(a, b, b, c); gmp_printf("a: %Zd\n", a); mpz_clear(a); mpz_clear(b); mpz_clear(c); } ---------- ----------------------------------------- -- You received this message because you are subscribed to the Google Groups "mpir-devel" group. To post to this group, send email to mpir-devel@googlegroups.com. To unsubscribe from this group, send email to mpir-devel+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/mpir-devel?hl=en.
