Attachment 111313 Details for Bug 87694 – Details about crash from GDB

Details about crash from GDB

CRASH.txt (text/plain), 4.09 KB, created by nmcveity on 2014-12-25 05:25:41 UTC

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Creator: nmcveity

Created: 2014-12-25 05:25:41 UTC

Size: 4.09 KB

patch

obsolete

>
>
>Program received signal SIGSEGV, Segmentation fault.
>0x00007ffff3227964 in _mesa_compute_max_transform_feedback_vertices (obj=0x6c5dd0, info=0x50) at ../../src/mesa/main/transformfeedback.c:357
>357        for (i = 0; i < info->NumBuffers; ++i) {
>(gdb) bt
>#0  0x00007ffff3227964 in _mesa_compute_max_transform_feedback_vertices (obj=0x6c5dd0, info=0x50) at ../../src/mesa/main/transformfeedback.c:357
>#1  0x00007ffff3532d31 in brw_begin_transform_feedback (ctx=0x7ffff7fa4040, mode=0, obj=0x6c5dd0) at gen6_sol.c:258
>#2  0x00007ffff3227cd2 in _mesa_BeginTransformFeedback (mode=0) at ../../src/mesa/main/transformfeedback.c:483
>#3  0x00007ffff7985410 in glBeginTransformFeedback (mode=0) at ../../src/mapi/glapi/glapi_mapi_tmp.h:7072
>#4  0x0000000000401709 in display () at main.c:157
>#5  0x00007ffff76b9244 in ?? () from /usr/lib/x86_64-linux-gnu/libglut.so.3
>#6  0x00007ffff76bcaa9 in fgEnumWindows () from /usr/lib/x86_64-linux-gnu/libglut.so.3
>#7  0x00007ffff76b97fd in glutMainLoopEvent () from /usr/lib/x86_64-linux-gnu/libglut.so.3
>#8  0x00007ffff76ba065 in glutMainLoop () from /usr/lib/x86_64-linux-gnu/libglut.so.3
>#9  0x00000000004017bb in main (nargs=1, args=0x7fffffffe208) at main.c:177
>(gdb) f 0
>#0  0x00007ffff3227964 in _mesa_compute_max_transform_feedback_vertices (obj=0x6c5dd0, info=0x50) at ../../src/mesa/main/transformfeedback.c:357
>357        for (i = 0; i < info->NumBuffers; ++i) {
>(gdb) info args
>obj = 0x6c5dd0
>info = 0x50
>(gdb) f 1
>#1  0x00007ffff3532d31 in brw_begin_transform_feedback (ctx=0x7ffff7fa4040, mode=0, obj=0x6c5dd0) at gen6_sol.c:258
>258        unsigned max_index
>(gdb) info args
>ctx = 0x7ffff7fa4040
>mode = 0
>obj = 0x6c5dd0
>(gdb) info locals
>brw = 0x7ffff7fa4040
>shaderprog = 0x0
>linked_xfb_info = 0x50
>xfb_obj = 0x6c5dd0
>__PRETTY_FUNCTION__ = "brw_begin_transform_feedback"
>max_index = 4
>(gdb) list -20
>228
>229        free(brw_obj);
>230     }
>231
>232     void
>233     brw_begin_transform_feedback(struct gl_context *ctx, GLenum mode,
>234                                  struct gl_transform_feedback_object *obj)
>235     {
>236        struct brw_context *brw = brw_context(ctx);
>237        const struct gl_shader_program *shaderprog;
>(gdb) list
>238        const struct gl_transform_feedback_info *linked_xfb_info;
>239        struct gl_transform_feedback_object *xfb_obj =
>240           ctx->TransformFeedback.CurrentObject;
>241
>242        assert(brw->gen == 6);
>243
>244        if (brw->geometry_program) {
>245           /* BRW_NEW_GEOMETRY_PROGRAM */
>246           shaderprog =
>247              ctx->_Shader->CurrentProgram[MESA_SHADER_GEOMETRY];
>(gdb) list
>248        } else {
>249           /* BRW_NEW_VERTEX_PROGRAM */
>250           shaderprog =
>251              ctx->_Shader->CurrentProgram[MESA_SHADER_VERTEX];
>252        }
>253        linked_xfb_info = &shaderprog->LinkedTransformFeedback;
>254
>255        /* Compute the maximum number of vertices that we can write without
>256         * overflowing any of the buffers currently being used for feedback.
>257         */
>(gdb) print brw->geometry_program 
>$1 = (const struct gl_geometry_program *) 0xaa74b0
>(gdb) print ctx->_Shader->CurrentProgram[MESA_SHADER_GEOMETRY]
>$2 = (struct gl_shader_program *) 0x0
>(gdb) print linked_xfb_info 
>$3 = (const struct gl_transform_feedback_info *) 0x50
>(gdb) l
>258        unsigned max_index
>259           = _mesa_compute_max_transform_feedback_vertices(xfb_obj,
>260                                                           linked_xfb_info);
>261
>262        /* 3DSTATE_GS_SVB_INDEX is non-pipelined. */
>263        intel_emit_post_sync_nonzero_flush(brw);
>264
>265        /* Initialize the SVBI 0 register to zero and set the maximum index. */
>266        BEGIN_BATCH(4);
>267        OUT_BATCH(_3DSTATE_GS_SVB_INDEX << 16 | (4 - 2));
>(gdb) print xfb_obj
>$4 = (struct gl_transform_feedback_object *) 0x6c5dd0
>(gdb) print xfb_obj[0]
>$5 = {Name = 0, Label = 0x0, RefCount = 2, Active = 1 '\001', Paused = 0 '\000', EndedAnytime = 0 '\000', EverBound = 1 '\001', shader_program = 0x767650, 
>  GlesRemainingPrims = 0, BufferNames = {2, 0, 0, 0}, Buffers = {0x72ba30, 0x0, 0x0, 0x0}, Offset = {0, 0, 0, 0}, Size = {16, 0, 0, 0}, RequestedSize = {0, 0, 0, 0}}
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Attachments on bug 87694: 111311 | 111312 | 111313

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