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Id: 119740
Status: new
Priority: 0/
Queue: PDL-Graphics-PLplot

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Owner: Nobody in particular
Requestors: ppisar [...] redhat.com
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Bug Information
Severity: (no value)
Broken in: 0.71
Fixed in: (no value)



Subject: plshades() crashes on 64-bit PowerPC
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I experience a crash when running tests on 64-bit PowerPC (big or little endian): t/plplot.t ................ All 15 subtests passed sh: line 1: 28335 Segmentation fault (core dumped) perl -Mblib ./t/x09.pl -dev svg -o x09p.svg -fam > /dev/null 2>&1 # Failed test 'Script ./t/x09.pl ran successfully' # at t/plplot_library_tests.t line 68. # Failed test 'Output file x09p.svg.2 matches C output' # at t/plplot_library_tests.t line 74. sh: line 1: 28730 Segmentation fault (core dumped) perl -Mblib ./t/x22.pl -dev svg -o x22p.svg -fam > /dev/null 2>&1 # Failed test 'Script ./t/x22.pl ran successfully' # at t/plplot_library_tests.t line 68. # Failed test 'Output file x22p.svg.1 matches C output' # at t/plplot_library_tests.t line 74. # Looks like you failed 4 tests of 221. t/plplot_library_tests.t .. Dubious, test returned 4 (wstat 1024, 0x400) Failed 4/221 subtests Test Summary Report ------------------- t/plplot.t (Wstat: 139 Tests: 15 Failed: 0) Non-zero wait status: 139 Parse errors: No plan found in TAP output t/plplot_library_tests.t (Wstat: 1024 Tests: 221 Failed: 4) Failed tests: 67, 69, 122-123 Non-zero exit status: 4 Files=2, Tests=236, 41 wallclock secs ( 0.05 usr 0.01 sys + 13.73 cusr 1.06 csys = 14.85 CPU) Result: FAIL The crash is caused by dereferencing inaccessible grid pointer in pltr1() function, plplot-5.11.1/src/plcont.c:896: void pltr1( PLFLT x, PLFLT y, PLFLT *tx, PLFLT *ty, PLPointer pltr_data ) { PLINT ul, ur, vl, vr; PLFLT du, dv; PLFLT xl, xr, yl, yr; PLcGrid *grid = (PLcGrid *) pltr_data; PLFLT *xg = grid->xg; PLFLT *yg = grid->yg; PLINT nx = grid->nx; → PLINT ny = grid->ny; Minimal reproducer is to run this code: use PDL; use PDL::Config; use PDL::Graphics::PLplot; my $dev = 'xfig'; # Test shade plotting (low level interface) plsdev ($dev); plsfnam ("test12.$dev"); plspage (0,0, 600,600, 0,0); plinit(); pladv (0); plvpor(0.1, 0.9, 0.1, 0.9); plwind (-1, 1, -1, 1); plpsty(0); my $nx = 35; my $ny = 46; my $x = (sequence($nx) - ($nx/2))/($nx/2); my $y = (sequence($ny) - ($ny/2))/(($ny/2) - 1.0); my $xv = $x->dummy(1, $y->nelem); my $yv = $y->dummy(0, $x->nelem); my $z = -sin(7*$xv) * cos (7*$yv) + $xv**2 - $yv**2; my $nsteps = 15; my ($zmin, $zmax) = $z->minmax; my $clevel = ((sequence($nsteps)*(($zmax - $zmin)/($nsteps-1))) + $zmin); my $xmap = ((sequence($nx)*(2/($nx-1))) + -1); # map X coords linearly to -1 to 1 my $ymap = ((sequence($ny)*(2/($ny-1))) + -1); my $grid = plAllocGrid ($xmap, $ymap); plshades($z, -1, 1, -1, 1, $clevel, 2, 0, 0, 1, 0, \&pltr1, $grid); I have no idea where the problem is, maybe it's a bug in plplot. See <https://bugzilla.redhat.com/show_bug.cgi?id=1410774> for more details.


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