Program terminated with signal 11, Segmentation fault. #0 0x00007f1d9af0cfdb in radeonWriteDepthSpan_s8_z24 ( ctx=<value optimized out>, rb=0x30588d0, n=<value optimized out>, x=<value optimized out>, y=971, values=<value optimized out>, mask=0x0) at ../../../../../src/mesa/drivers/dri/common/depthtmp.h:61 61 WRITE_DEPTH( x1, y, depth[i] ); Missing separate debuginfos, use: debuginfo-install expat-2.0.1-8.fc12.x86_64 glibc-2.11.1-1.x86_64 libICE-1.0.6-1.fc12.x86_64 libSM-1.1.0-7.fc12.x86_64 libX11-1.3-1.fc12.x86_64 libXau-1.0.5-1.fc12.x86_64 libXdamage-1.1.2-1.fc12.x86_64 libXext-1.1-2.fc12.x86_64 libXfixes-4.0.4-1.fc12.x86_64 libXi-1.3-2.fc12.x86_64 libXmu-1.0.5-1.fc12.x86_64 libXt-1.0.7-1.fc12.x86_64 libXxf86vm-1.1.0-1.fc12.x86_64 libdrm-2.4.18-0.1.fc12.x86_64 libgcc-4.4.3-4.fc12.x86_64 libjpeg-6b-46.fc12.x86_64 libstdc++-4.4.3-4.fc12.x86_64 libtiff-3.9.2-3.fc12.x86_64 libuuid-2.16.2-7.fc12.x86_64 libxcb-1.5-1.fc12.x86_64 zlib-1.2.3-23.fc12.x86_64 (gdb) where #0 0x00007f1d9af0cfdb in radeonWriteDepthSpan_s8_z24 ( ctx=<value optimized out>, rb=0x30588d0, n=<value optimized out>, x=<value optimized out>, y=971, values=<value optimized out>, mask=0x0) at ../../../../../src/mesa/drivers/dri/common/depthtmp.h:61 #1 0x00007f1d9afe56f8 in draw_depth_stencil_pixels (ctx=0x2b51c00, x=0, y=0, width=1000, height=972, type=34042, unpack=0x2b618e8, pixels=0x3332b70) at swrast/s_drawpix.c:667 #2 0x00007f1d9afe59a4 in _swrast_DrawPixels (ctx=0x2b51c00, x=<value optimized out>, y=<value optimized out>, width=1000, height=1000, format=34041, type=34042, unpack=0x2b618e8, pixels=<value optimized out>) at swrast/s_drawpix.c:812 #3 0x00007f1d9b01bb29 in _mesa_meta_DrawPixels (ctx=0x2b51c00, x=<value optimized out>, y=<value optimized out>, width=<value optimized out>, height=<value optimized out>, format=<value optimized out>, type=34042, unpack=0x2b618e8, pixels=0x3332b70) at drivers/common/meta.c:1798 #4 0x00007f1d9b043c05 in _mesa_DrawPixels (width=1000, height=1000, format=34041, type=34042, pixels=0x3332b70) at main/drawpix.c:119 #5 0x00000000004b4583 in GLEAN::DepthStencilTest::readPixelsRate ( this=0x79dd00, format=34041, type=34042) at /home/chris/Programs/piglit/tests/glean/tdepthstencil.cpp:245 #6 0x00000000004b470e in GLEAN::DepthStencilTest::testPerformance ( this=0x79dd00, r=...) at /home/chris/Programs/piglit/tests/glean/tdepthstencil.cpp:274 #7 0x00000000004b484c in GLEAN::DepthStencilTest::runOne (this=0x79dd00, r=..., w=...) at /home/chris/Programs/piglit/tests/glean/tdepthstencil.cpp:307 #8 0x00000000004b5e52 in GLEAN::BaseTest<GLEAN::DepthStencilResult>::run ( this=0x79dd00, environment=...) at /home/chris/Programs/piglit/tests/glean/tbase.h:320 #9 0x00000000004906ec in main (argc=5, argv=0x7fff4f4c68d8) at /home/chris/Programs/piglit/tests/glean/main.cpp:141
I don't understand the "why" on this one, just that the SIGSEGV happens within the following WRITE_DEPTH macro: #define WRITE_DEPTH( _x, _y, d ) \ do { \ GLuint *_ptr = (GLuint*)r600_ptr_depth( rrb, _x + x_off, _y + y_off ); \ GLuint tmp = *_ptr; \ tmp &= 0xff000000; \ tmp |= ((d) & 0x00ffffff); \ *_ptr = tmp; \ _ptr = (GLuint*)r600_ptr_stencil(rrb, _x + x_off, _y + y_off); \ tmp = *_ptr; \ tmp &= 0xffffff00; \ tmp |= ((d) >> 24) & 0xff; \ *_ptr = tmp; \ } while (0) The exact location seems to be the second line, where the contents of _ptr are assigned to GLuint tmp. In my particular example, _x = 640, _y = 971 and d = 0 when it explodes. It might be worth noting that this is an x86_64 machine, although it's definitely SIGSEGV and not SIGBUS.
Note: classic r600 driver has been abandoned. the glean/depthStencil test passes with r600g (gallium driver) on my rv770 tested with mesa git master 28f4be9eb91b12a2c6b1db6660cca71a98c486ec
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