On Tue, Aug 02, 2005 at 07:50:54AM -0400, Duncan Murdoch wrote: > Prof Brian Ripley wrote: > >Did you compile R without optimization? Such reads are often the result > >of read-aheads produced by the optimizer in an attempt to keep > >pipelines full (and are harmless). > > There were both a read and a write. I can see the read being harmless, > but is the write harmless? I suspect this may be the bug I fixed on > July 16, since it had to do with character classes including ranges > (like Charlie's "[a-pr-z]"). > > Charlie, have you tried a recent version of R-patched?
No. And I can't do it right away. I'm packing up to move back to Minneapolis after my sabbatical year in Seattle. Maybe in a few days. Sorry to not be more helpful. Maybe I'll try it on the plane if I can. > Duncan Murdoch > > > > >On an un-optimized build of R I am unable to reproduce this. (I also was > >unable to reproduce it on my optimized build of 2.1.1 using gcc 3.4.4, > >although I did get a report on other read-aheads.) > > > >On Mon, 1 Aug 2005 [EMAIL PROTECTED] wrote: > > > > > >>I think I am using objects according to the man page. > >>This seems to be a valid regular expression. But whether > >>I know what I'm doing or no, it still shouldn't be doing > >>what valgrind seems to be saying it's doing. (IMHO) > > > > > >I think you need to take that up with compiler designers: it is common > >practice. > > > > > >>---------- start of script ---------- > >>Script started on Mon 01 Aug 2005 02:09:00 PM PDT > >>linux$ printenv VALGRIND_OPTS > >>--tool=3Dmemcheck > >>linux$ cat bar.R > >> > >>foo <- 1 > >>bar <- 2:3 > >>baz <- 4:6 > >>qux <- matrix(7:10, 2) > >> > >>ls() > >>rm(list =3D objects(pattern =3D "^[a-pr-z]")) > >>ls() > >> > >>linux$ R --version > >>R 2.1.1 (2005-06-20). > >>Copyright (C) 2005 R Development Core Team > >> > >>R is free software and comes with ABSOLUTELY NO WARRANTY. > >>You are welcome to redistribute it under the terms of the GNU > >>General Public License. For more information about these matters, > >>see http://www.gnu.org/copyleft/gpl.html. > >>linux$ gcc --version > >>=1B[0mgcc (GCC) 3.3.5 20050117 (prerelease) (SUSE Linux) > >>=1B[0mCopyright (C) 2003 Free Software Foundation, Inc. > >>=1B[0mThis is free software; see the source for copying conditions. > >>There = > >>is NO > >>=1B[0mwarranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR > >>PU= > >>RPOSE. > >>=1B[0m > >>linux$ cat /etc/SuSE-release=20 > >>SuSE Linux 9.3 (i586) > >>VERSION =3D 9.3 > >>linux$ R --vanilla --debugger=3Dvalgrind < bar.R >| bar.Rout > >>=3D=3D22324=3D=3D Memcheck, a memory error detector for x86-linux. > >>=3D=3D22324=3D=3D Copyright (C) 2002-2004, and GNU GPL'd, by Julian > >>Seward = > >>et al. > >>=3D=3D22324=3D=3D Using valgrind-2.2.0, a program supervision framework > >>for= > >>x86-linux. > >>=3D=3D22324=3D=3D Copyright (C) 2000-2004, and GNU GPL'd, by Julian > >>Seward = > >>et al. > >>=3D=3D22324=3D=3D For more details, rerun with: -v > >>=3D=3D22324=3D=3D=20 > >>=3D=3D22324=3D=3D Invalid read of size 4 > >>=3D=3D22324=3D=3D at 0x81255AD: parse_expression (regex.c:5045) > >>=3D=3D22324=3D=3D by 0x8125868: parse_branch (regex.c:4475) > >>=3D=3D22324=3D=3D by 0x8125913: parse_reg_exp (regex.c:4420) > >>=3D=3D22324=3D=3D by 0x81261B3: Rf_regcomp (regex.c:4384) > >>=3D=3D22324=3D=3D Address 0x1C1E23A8 is 0 bytes after a block of size 32 > >>a= > >>lloc'd > >>=3D=3D22324=3D=3D at 0x1B90650D: calloc (in > >>/usr/lib/valgrind/vgpreload_= > >>memcheck.so) > >>=3D=3D22324=3D=3D by 0x81247B5: parse_expression (regex.c:5406) > >>=3D=3D22324=3D=3D by 0x8125868: parse_branch (regex.c:4475) > >>=3D=3D22324=3D=3D by 0x8125913: parse_reg_exp (regex.c:4420) > >>=3D=3D22324=3D=3D=20 > >>=3D=3D22324=3D=3D Invalid write of size 4 > >>=3D=3D22324=3D=3D at 0x81255B2: parse_expression (regex.c:5045) > >>=3D=3D22324=3D=3D by 0x8125868: parse_branch (regex.c:4475) > >>=3D=3D22324=3D=3D by 0x8125913: parse_reg_exp (regex.c:4420) > >>=3D=3D22324=3D=3D by 0x81261B3: Rf_regcomp (regex.c:4384) > >>=3D=3D22324=3D=3D Address 0x1C1E23A8 is 0 bytes after a block of size 32 > >>a= > >>lloc'd > >>=3D=3D22324=3D=3D at 0x1B90650D: calloc (in > >>/usr/lib/valgrind/vgpreload_= > >>memcheck.so) > >>=3D=3D22324=3D=3D by 0x81247B5: parse_expression (regex.c:5406) > >>=3D=3D22324=3D=3D by 0x8125868: parse_branch (regex.c:4475) > >>=3D=3D22324=3D=3D by 0x8125913: parse_reg_exp (regex.c:4420) > >>=3D=3D22324=3D=3D=20 > >>=3D=3D22324=3D=3D ERROR SUMMARY: 2 errors from 2 contexts (suppressed: 39 > >>f= > >>rom 2) > >>=3D=3D22324=3D=3D malloc/free: in use at exit: 12691882 bytes in 6426 > >>block= > >>s. > >>=3D=3D22324=3D=3D malloc/free: 32534 allocs, 26108 frees, 33105500 bytes > >>al= > >>located. > >>=3D=3D22324=3D=3D For a detailed leak analysis, rerun with: --leak-check= > >>=3Dyes > >>=3D=3D22324=3D=3D For counts of detected errors, rerun with: -v > >>linux$ exit > >> > >>Script done on Mon 01 Aug 2005 02:10:42 PM PDT > >>---------- end of script ---------- > >>--=20 > >>Charles Geyer > >>Professor, School of Statistics > >>University of Minnesota > >>[EMAIL PROTECTED] > >> > >>______________________________________________ > >>R-devel@r-project.org mailing list > >>https://stat.ethz.ch/mailman/listinfo/r-devel > >> > >> > > > > -- Charles Geyer Professor, School of Statistics University of Minnesota [EMAIL PROTECTED] ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
