[Mesa3d-dev] [ mesa3d-Bugs-886628 ] Mesa-6.0 fails on Tru64

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Bugs item #886628, was opened at 2004-01-28 19:32
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Category: mesa-core
Group: Fatal Error
Status: Open
Resolution: None
Priority: 5
Submitted By: bill (slamhead)
Assigned to: Nobody/Anonymous (nobody)
Summary: Mesa-6.0 fails on Tru64

Initial Comment:
using Tue64, I had the following three problems:

1) missing CXX definition in the Make-config for 
   osf1 (fails to build GLU)

2) _ASMAPI in improperly defined in glheader.h

change line  231
  #if !defined( __GNUC__ ) && !defined( VMS ) &&
!defined( __INTEL_COMPILER )

to #if !defined( __GNUC__ ) && !defined( VMS ) &&
!defined( __INTEL_COMPILER ) && !defined( __osf__ )


3) 99% of the demos fail in the same function
   here is a sample:

# dbx -I../../src/mesa/tnl arbfplight core
dbx version 3.11.10
Type 'help' for help.
Core file created by program "arbfplight"

signal Segmentation fault at   [_tnl_wrap_buffers:55
+0x14,0x3ffb95f9900] 
GLuint last_prim =
tnl->vtx.prim[tnl->vtx.prim_count-1].mode;

(dbx) where
>  0 _tnl_wrap_buffers(ctx = 0x14000e280)
["t_vtx_api.c":55, 0x3ffb95f9900]
   1 _tnl_wrap_upgrade_vertex(ctx = 0x14000e280, attr =
18, newsz = 4) ["t_vtx_api.c":192, 0x3ffb95f9e1c]
   2 _tnl_fixup_vertex(ctx = 0x14000e280, attr = 18, sz
= 4) ["t_vtx_api.c":285, 0x3ffb95fa194]
   3 _tnl_Materialfv(face = 1032, pname = 4609, params
= 0x140000268) ["t_vtx_api.c":816, 0x3ffb95fe3bc]
   4 neutral_Materialfv(face = 1032, pname = 4609, v =
0x140000268) ["vtxfmt_tmp.h":138, 0x3ffb953d5d0]
   5 glMaterialfv(face = 1032, pname = 4609, params =
0x140000268) ["../glapi/glapitemp.h":903,0x3ffb9488cec]
   6 Init() ["arbfplight.c":337, 0x120002ed4]
   7 main(argc = 1, argv = 0x11ffff328)
["arbfplight.c":359, 0x120003074]
(dbx) p tnl->vtx.prim_count
0 
(dbx) quit
# 

It seems that sometimes tnl->vtx.prim_count is set to
0 ; makeing rhe pointer invalid (-1) and blowing up

I added a check in _tnl_wrap_buffers:

  static void _tnl_wrap_buffers( GLcontext *ctx )
  {
     TNLcontext *tnl = TNL_CONTEXT(ctx);
    GLuint last_prim, last_count;
    GLint j = tnl->vtx.prim_count - 1;
    if (j < 0) j = 0;
    last_prim = tnl->vtx.prim[j].mode;
    last_count = tnl->vtx.prim[j].count;

this prevents the demos from crashing. I can't
seem to find where prim_count is getting set to 0.

99% of them run ok except for demos/reflect
redbook/fogindex where the output is not correct.

redbook/varray is thw only one that still crahses:
# dbx -I../../src/mesa/tnl varray core
dbx version 3.11.10
Type 'help' for help.
Core file created by program "varray"

signal Segmentation fault at   [attrib_3_3:427
+0x1dc,0x3ffb961e8fc]    ATTRS( 3 )

(dbx) where
>  0 attrib_3_3(v = 0x400000e0) ["t_vtx_api.c":427,
0x3ffb961e8fc]
   1 do_choose(attr = 3, sz = 3, fallback_attr_func =
0x3ffb961e8dc, choose1 = 0
x3ffb961e848, choose2 = 0x3ffb961e7f8, choose3 =
0x3ffb961e7a8, choose4 = 0x3ffb
961e758, v = 0x400000e0) ["t_vtx_api.c":339,
0x3ffb961dd5c]
   2 choose_3_3(v = 0x400000e0) ["t_vtx_api.c":427,
0x3ffb961e7e8]
   3 _tnl_Color3fv(v = 0x400000e0) ["t_vtx_api.c":612,
0x3ffb9620e1c]
   4 neutral_Color3fv(v = 0x400000e0)
["vtxfmt_tmp.h":48, 0x3ffb95498b0]
   5 glColor3fv(v = 0x400000e0)
["../glapi/glapitemp.h":123, 0x3ffb9488e74]
   6 _ae_loopback_array_elt(elt = 0)
["api_arrayelt.c":363, 0x3ffb945bf24]
   7 neutral_ArrayElement(i = 0) ["vtxfmt_tmp.h":36,
0x3ffb9549680]
   8 glArrayElement(i = 0)
["../glapi/glapitemp.h":1583, 0x3ffb948de54]
   9 fallback_drawarrays(ctx = 0x14000ca80, mode = 4,
start = 0, count = 6) ["t_array_api.c":57,
0x3ffb95ec5d4]
  10 _tnl_DrawArrays(mode = 4, start = 0, count = 6)
["t_array_api.c":153, 0x3ffb95ec9e4]
  11 neutral_DrawArrays(mode = 4, start = 0, count = 6)
["vtxfmt_tmp.h":332, 0x3ffb954cbf8]
  12 glDrawArrays(mode = 4, first = 0, count = 6)
["../glapi/glapitemp.h":1598, 0x3ffb948df30]
  13 display() ["varray.c":104, 0x120002390]
  14 processWindowWorkList(window = 0x140008880)
["glut_event.c":1297, 0x3ffbfba62ac]
  15 __glutProcessWindowWorkLists()
["glut_event.c":1344, 0x3ffbfba63a0]
  16 glutMainLoop() ["glut_event.c":1365,0x3ffbfba6434]
  17 main(argc = 1, argv = 0x11ffff328)
["varray.c":184, 0x120002784]
(dbx) q



 




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