Marc-André Lureau
530593da65
I noticed some heap corruption running virgl tests, and valgrind helped me to track it down to the following error: ==29272== Invalid write of size 4 ==29272== at 0x90283D4: push_loop_stack (brw_eu_emit.c:1307) ==29272== by 0x9029A7D: brw_DO (brw_eu_emit.c:1750) ==29272== by 0x90554B0: fs_generator::generate_code(cfg_t const*, int) (brw_fs_generator.cpp:1999) ==29272== by 0x904491F: brw_compile_fs (brw_fs.cpp:5685) ==29272== by 0x8FC5DC5: brw_codegen_wm_prog (brw_wm.c:137) ==29272== by 0x8FC7663: brw_fs_precompile (brw_wm.c:638) ==29272== by 0x8FA4040: brw_shader_precompile(gl_context*, gl_shader_program*) (brw_link.cpp:51) ==29272== by 0x8FA4A9A: brw_link_shader (brw_link.cpp:260) ==29272== by 0x8DEF751: _mesa_glsl_link_shader (ir_to_mesa.cpp:3006) ==29272== by 0x8C84325: _mesa_link_program (shaderapi.c:1042) ==29272== by 0x8C851D7: _mesa_LinkProgram (shaderapi.c:1515) ==29272== by 0x4E4B8E8: add_shader_program (vrend_renderer.c:880) ==29272== Address 0xf2f3cb0 is 0 bytes after a block of size 112 alloc'd ==29272== at 0x4C2AA98: calloc (vg_replace_malloc.c:711) ==29272== by 0x8ED11F7: ralloc_size (ralloc.c:113) ==29272== by 0x8ED1282: rzalloc_size (ralloc.c:134) ==29272== by 0x8ED14C0: rzalloc_array_size (ralloc.c:196) ==29272== by 0x9019C7B: brw_init_codegen (brw_eu.c:291) ==29272== by 0x904F565: fs_generator::fs_generator(brw_compiler const*, void*, void*, void const*, brw_stage_prog_data*, unsigned int, bool, gl_shader_stage) (brw_fs_generator.cpp:124) ==29272== by 0x9044883: brw_compile_fs (brw_fs.cpp:5675) ==29272== by 0x8FC5DC5: brw_codegen_wm_prog (brw_wm.c:137) ==29272== by 0x8FC7663: brw_fs_precompile (brw_wm.c:638) ==29272== by 0x8FA4040: brw_shader_precompile(gl_context*, gl_shader_program*) (brw_link.cpp:51) ==29272== by 0x8FA4A9A: brw_link_shader (brw_link.cpp:260) ==29272== by 0x8DEF751: _mesa_glsl_link_shader (ir_to_mesa.cpp:3006) if_depth_in_loop is an array of size p->loop_stack_array_size, and push_loop_stack() will access if_depth_in_loop[p->loop_stack_depth+1], thus the condition to grow the array should be p->loop_stack_array_size <= (p->loop_stack_depth + 1) (it's currently off by 2...) This can be reproduced by running the following test with virgl test server: LIBGL_ALWAYS_SOFTWARE=y GALLIUM_DRIVER=virpipe bin/shader_runner ./tests/shaders/glsl-fs-unroll-explosion.shader_test -auto Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
File: docs/README.WIN32 Last updated: 21 June 2013 Quick Start ----- ----- Windows drivers are build with SCons. Makefiles or Visual Studio projects are no longer shipped or supported. Run scons libgl-gdi to build gallium based GDI driver. This will work both with MSVS or Mingw. Windows Drivers ------- ------- At this time, only the gallium GDI driver is known to work. Source code also exists in the tree for other drivers in src/mesa/drivers/windows, but the status of this code is unknown. Recipe ------ Building on windows requires several open-source packages. These are steps that work as of this writing. - install python 2.7 - install scons (latest) - install mingw, flex, and bison - install pywin32 from here: http://www.lfd.uci.edu/~gohlke/pythonlibs get pywin32-218.4.win-amd64-py2.7.exe - install git - download mesa from git see http://www.mesa3d.org/repository.html - run scons General ------- After building, you can copy the above DLL files to a place in your PATH such as $SystemRoot/SYSTEM32. If you don't like putting things in a system directory, place them in the same directory as the executable(s). Be careful about accidentially overwriting files of the same name in the SYSTEM32 directory. The DLL files are built so that the external entry points use the stdcall calling convention. Static LIB files are not built. The LIB files that are built with are the linker import files associated with the DLL files. The si-glu sources are used to build the GLU libs. This was done mainly to get the better tessellator code. If you have a Windows-related build problem or question, please post to the mesa-dev or mesa-users list.