On 2012-11-23 12:13-0000 Andrew Ross wrote: > Alan, > > This is odd, because there definitely seems to be a bug in the plplot > code path for plotting text. I've just fixed it now. This gave > problems for both pngcairo and pscairo for me.
That is odd indeed that the valgrind run for me for pngcairo was fine, but not for you. However, I have just run the same two tests again with your change (at revision 12279) valgrind examples/c/x02c -dev pngcairo -o test.png -fam valgrind examples/c/x02c -dev pngcairo -o test.png and all continues to be well for me. However, I still get valgrind problems with pscairo, e.g., software@raven> valgrind --num-callers=40 \ examples/c/x02c -dev pscairo -o test.ps ==4666== Memcheck, a memory error detector ==4666== Copyright (C) 2002-2011, and GNU GPL'd, by Julian Seward et al. ==4666== Using Valgrind-3.7.0 and LibVEX; rerun with -h for copyright info ==4666== Command: examples/c/x02c -dev pscairo -o test.ps ==4666== ==4666== Invalid read of size 4 ==4666== at 0x74E2145: ??? (in /usr/lib/x86_64-linux-gnu/libcairo.so.2.11200.2) ==4666== by 0x74E3742: ??? (in /usr/lib/x86_64-linux-gnu/libcairo.so.2.11200.2) ==4666== by 0x74E3C20: ??? (in /usr/lib/x86_64-linux-gnu/libcairo.so.2.11200.2) ==4666== by 0x75109C9: ??? (in /usr/lib/x86_64-linux-gnu/libcairo.so.2.11200.2) ==4666== by 0x74E09DD: ??? (in /usr/lib/x86_64-linux-gnu/libcairo.so.2.11200.2) ==4666== by 0x7511067: ??? (in /usr/lib/x86_64-linux-gnu/libcairo.so.2.11200.2) ==4666== by 0x74C668B: ??? (in /usr/lib/x86_64-linux-gnu/libcairo.so.2.11200.2) ==4666== by 0x74C6ACC: cairo_surface_finish (in /usr/lib/x86_64-linux-gnu/libcairo.so.2.11200.2) ==4666== by 0x74A1AD3: ??? (in /usr/lib/x86_64-linux-gnu/libcairo.so.2.11200.2) ==4666== by 0x74C668B: ??? (in /usr/lib/x86_64-linux-gnu/libcairo.so.2.11200.2) ==4666== by 0x74C679C: cairo_surface_destroy (in /usr/lib/x86_64-linux-gnu/libcairo.so.2.11200.2) ==4666== by 0x6E019A9: plD_tidy_cairo (in /home/software/plplot_svn/HEAD/build_dir/drivers/cairo.so) ==4666== by 0x4E4F0FE: c_plend1 (in /home/software/plplot_svn/HEAD/build_dir/src/libplplotd.so.11.0.0) ==4666== by 0x4E4F162: c_plend (in /home/software/plplot_svn/HEAD/build_dir/src/libplplotd.so.11.0.0) ==4666== by 0x400D8A: main (in /home/software/plplot_svn/HEAD/build_dir/examples/c/x02c) ==4666== Address 0xb8280b8 is 8 bytes inside a block of size 11 alloc'd ==4666== at 0x4C28BED: malloc (vg_replace_malloc.c:263) ==4666== by 0x74E21F1: ??? (in /usr/lib/x86_64-linux-gnu/libcairo.so.2.11200.2) ==4666== by 0x74E3742: ??? (in /usr/lib/x86_64-linux-gnu/libcairo.so.2.11200.2) ==4666== by 0x74E3C20: ??? (in /usr/lib/x86_64-linux-gnu/libcairo.so.2.11200.2) ==4666== by 0x75109C9: ??? (in /usr/lib/x86_64-linux-gnu/libcairo.so.2.11200.2) ==4666== by 0x74E09DD: ??? (in /usr/lib/x86_64-linux-gnu/libcairo.so.2.11200.2) ==4666== by 0x7511067: ??? (in /usr/lib/x86_64-linux-gnu/libcairo.so.2.11200.2) ==4666== by 0x74C668B: ??? (in /usr/lib/x86_64-linux-gnu/libcairo.so.2.11200.2) ==4666== by 0x74C6ACC: cairo_surface_finish (in /usr/lib/x86_64-linux-gnu/libcairo.so.2.11200.2) ==4666== by 0x74A1AD3: ??? (in /usr/lib/x86_64-linux-gnu/libcairo.so.2.11200.2) ==4666== by 0x74C668B: ??? (in /usr/lib/x86_64-linux-gnu/libcairo.so.2.11200.2) ==4666== by 0x74C679C: cairo_surface_destroy (in /usr/lib/x86_64-linux-gnu/libcairo.so.2.11200.2) ==4666== by 0x6E019A9: plD_tidy_cairo (in /home/software/plplot_svn/HEAD/build_dir/drivers/cairo.so) ==4666== by 0x4E4F0FE: c_plend1 (in /home/software/plplot_svn/HEAD/build_dir/src/libplplotd.so.11.0.0) ==4666== by 0x4E4F162: c_plend (in /home/software/plplot_svn/HEAD/build_dir/src/libplplotd.so.11.0.0) ==4666== by 0x400D8A: main (in /home/software/plplot_svn/HEAD/build_dir/examples/c/x02c) ==4666== ==4666== ==4666== HEAP SUMMARY: ==4666== in use at exit: 387,975 bytes in 2,703 blocks ==4666== total heap usage: 19,606 allocs, 16,903 frees, 4,869,363 bytes allocated ==4666== ==4666== LEAK SUMMARY: ==4666== definitely lost: 4,440 bytes in 8 blocks ==4666== indirectly lost: 16,160 bytes in 503 blocks ==4666== possibly lost: 56,513 bytes in 157 blocks ==4666== still reachable: 310,862 bytes in 2,035 blocks ==4666== suppressed: 0 bytes in 0 blocks ==4666== Rerun with --leak-check=full to see details of leaked memory ==4666== ==4666== For counts of detected and suppressed errors, rerun with: -v ==4666== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 7 from 7) If you cannot replicate that, then presumably the update between my version (pango-1.30.0-1, cairo-1.12.2-2) and yours (or else an improved valgrind suppressions file in your case) solved this problem, and the issue is nothing for us to worry about. Alan __________________________ Alan W. Irwin Astronomical research affiliation with Department of Physics and Astronomy, University of Victoria (astrowww.phys.uvic.ca). Programming affiliations with the FreeEOS equation-of-state implementation for stellar interiors (freeeos.sf.net); the Time Ephemerides project (timeephem.sf.net); PLplot scientific plotting software package (plplot.sf.net); the libLASi project (unifont.org/lasi); the Loads of Linux Links project (loll.sf.net); and the Linux Brochure Project (lbproject.sf.net). __________________________ Linux-powered Science __________________________ ------------------------------------------------------------------------------ Monitor your physical, virtual and cloud infrastructure from a single web console. Get in-depth insight into apps, servers, databases, vmware, SAP, cloud infrastructure, etc. Download 30-day Free Trial. 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