| Summary: | Crash in debug_backtrace_capture (src/gallium/auxiliary/util/u_debug_stack.c) when running mesa-demos using drm backend | ||
|---|---|---|---|
| Product: | Mesa | Reporter: | Sergey Matyukevich <geomatsi> |
| Component: | Other | Assignee: | mesa-dev |
| Status: | RESOLVED FIXED | QA Contact: | |
| Severity: | normal | ||
| Priority: | medium | ||
| Version: | git | ||
| Hardware: | x86 (IA32) | ||
| OS: | Linux (All) | ||
| Whiteboard: | |||
| i915 platform: | i915 features: | ||
FWIW, I think I ran into this bug earlier in the year in a VM that I was testing. I never found the cause though. At the time I just disabled the code and forgot about it. (In reply to comment #0) > The following fixes/workaround have been found: > > 0. to build mesa without debug support :-) > > 1. to build with explicit compiler flag -fno-omit-frame-pointer Yes, debug build without frame pointers is rather useless combination IMHO. Our autotools build should take care of that automatically. > 2. to apply the following patch Thanks. I've pushed it now. |
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Mesa crashes in function debug_backtrace_capture (src/gallium/auxiliary/util/u_debug_stack.c) when running mesa-demos using drm backend. * Mesa version git revision 97747ac88fe9207dde83b275a93ebcee3a84dc01 * Host/OS Debian-7.0 (wheezy) running in VMwarePlayer-4.0.4 build-744019 * Mesa configuration command # ./autogen.sh --enable-debug --enable-openvg --enable-gles1 --enable-gles2 --enable-gbm --enable-gallium-loader --enable-gallium-drm-loader --enable-gallium-gbm --enable-gallium-egl --with-gallium-drivers=swrast,svga --with-egl-platforms=wayland,fbdev,drm --with-dri-drivers= --enable-shared-glapi --disable-driglx-direct * Mesa configuration output prefix: /usr/local exec_prefix: ${prefix} libdir: ${exec_prefix}/lib includedir: ${prefix}/include OpenGL: yes (ES1: yes ES2: yes) OpenVG: yes OSMesa: no DRI drivers: no DRI driver dir: ${libdir}/dri GLX: DRI-based EGL: yes EGL platforms: wayland fbdev drm EGL drivers: builtin:egl_glx builtin:egl_dri2 egl_gallium EGL Gallium STs: $(VG_LIB) $(GL_LIB) llvm: yes llvm-config: /usr/local/bin/llvm-config llvm-version: 3.0 Gallium: yes Gallium dirs: auxiliary drivers state_trackers Target dirs: dri-swrast dri-vmwgfx egl-static gbm Winsys dirs: svga/drm sw sw/dri sw/fbdev sw/null sw/wayland Driver dirs: galahad identity llvmpipe noop rbug softpipe svga trace Trackers dirs: dri egl gbm vega Shared libs: yes Static libs: no Shared-glapi: yes CFLAGS: -g -O2 -Wall -std=c99 -Werror=implicit-function-declaration -Werror=missing-prototypes -fno-strict-aliasing -fno-builtin-memcmp -g -fPIC CXXFLAGS: -g -O2 -Wall -fno-strict-aliasing -fno-builtin-memcmp -g -fPIC Macros: -D_GNU_SOURCE -DHAVE_PTHREAD -DDEBUG -DUSE_X86_ASM -DUSE_MMX_ASM -DUSE_3DNOW_ASM -DUSE_SSE_ASM -DHAVE_DLOPEN -DHAVE_POSIX_MEMALIGN -DIN_DRI_DRIVER -DGLX_INDIRECT_RENDERING -DUSE_EXTERNAL_DXTN_LIB=1 -DIN_DRI_DRIVER -DHAVE_ALIAS -DHAVE_MINCORE -DHAVE_LIBUDEV -DHAVE_LLVM=0x0300 PYTHON2: python Run 'make' to build Mesa * Demo application output Environement variables: LIBGL_DEBUG=verbose EGL_PLATFORM=drm EGL_LOG_LEVEL=debug Demo application output # torus_screen libEGL debug: Native platform type: drm (environment overwrite) libEGL debug: EGL search path is /usr/local/lib/egl libEGL debug: added /usr/local/lib/egl/egl_gallium.so to module array libEGL debug: added egl_dri2 to module array libEGL debug: added egl_glx to module array libEGL debug: dlopen(/usr/local/lib/egl/egl_gallium.so) libEGL info: use DRM for display (nil) libEGL debug: the best driver is Gallium EGL_VERSION = 1.4 (Gallium) libEGL debug: the value (0x0) of attribute 0x3025 did not meet the criteria (0x1) libEGL debug: the value (0x0) of attribute 0x3025 did not meet the criteria (0x1) Segmentation fault * Demo application gdb stacktrace (gdb) run Starting program: /root/graphics-experiments/mesa-demos/src/egl/opengles1/torus_screen [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/i386-linux-gnu/i686/cmov/libthread_db.so.1". libEGL debug: Native platform type: drm (environment overwrite) libEGL debug: EGL search path is /usr/local/lib/egl libEGL debug: added /usr/local/lib/egl/egl_gallium.so to module array libEGL debug: added egl_dri2 to module array libEGL debug: added egl_glx to module array libEGL debug: dlopen(/usr/local/lib/egl/egl_gallium.so) libEGL info: use DRM for display (nil) libEGL debug: the best driver is Gallium EGL_VERSION = 1.4 (Gallium) libEGL debug: the value (0x0) of attribute 0x3025 did not meet the criteria (0x1) libEGL debug: the value (0x0) of attribute 0x3025 did not meet the criteria (0x1) Program received signal SIGSEGV, Segmentation fault. debug_backtrace_capture (backtrace=backtrace@entry=0x80c01fc, start_frame=start_frame@entry=1, nr_frames=nr_frames@entry=8) at util/u_debug_stack.c:52 52 __asm__ __volatile__("mov (%%ebp),%0": "=r" (frame_pointer)); (gdb) bt #0 debug_backtrace_capture (backtrace=backtrace@entry=0x80c01fc, start_frame=start_frame@entry=1, nr_frames=nr_frames@entry=8) at util/u_debug_stack.c:52 #1 0xb4856790 in pb_debug_manager_create_buffer (_mgr=0x8055310, size=1024, desc=0xbffff608) at pipebuffer/pb_bufmgr_debug.c:417 #2 0xb4805704 in vmw_svga_winsys_buffer_create (sws=0x8054e20, alignment=1, usage=0, size=1024) at vmw_screen_svga.c:75 #3 0xb480ed7e in svga_winsys_buffer_create (svga=svga@entry=0x8069de8, alignment=alignment@entry=1, usage=usage@entry=0, size=1024) at svga_resource_buffer_upload.c:61 #4 0xb480d082 in svga_texture_transfer_map (pipe=0x8069de8, texture=0x80c0090, level=0, usage=2, box=0xbffff7b0, ptransfer=0xbffff7ac) at svga_resource_texture.c:272 #5 0xb48751e8 in u_transfer_map_vtbl (context=0x8069de8, resource=0x80c0090, level=0, usage=2, box=0xbffff7b0, transfer=0xbffff7ac) at util/u_resource.c:35 #6 0xb483c17f in aaline_create_texture (aaline=0x80be6a0) at draw/draw_pipe_aaline.c:454 #7 draw_install_aaline_stage (draw=0x8082a60, pipe=pipe@entry=0x8069de8) at draw/draw_pipe_aaline.c:949 #8 0xb481ffe2 in svga_init_swtnl (svga=svga@entry=0x8069de8) at svga_swtnl_draw.c:164 #9 0xb481352c in svga_context_create (screen=0x8055660, priv=0x0) at svga_context.c:159 #10 0xb6440320 in st_api_create_context (stapi=0xb783f3e0, smapi=0x80623a0, attribs=0xbffff9b4, error=0xbffff9b0, shared_stctxi=0x0) at ../../src/mesa/state_tracker/st_manager.c:633 #11 0xb63d7389 in egl_g3d_create_context (drv=0x8051ff8, dpy=0x804d008, conf=0x8068d88, share=0x0, attribs=0xbffffa80) at common/egl_g3d_api.c:176 #12 0xb7f8c0ae in eglCreateContext (dpy=0x804d008, config=0x8068d88, share_list=share_list@entry=0x0, attrib_list=attrib_list@entry=0xbffffa80) at eglapi.c:437 #13 0x0804a687 in _eglutCreateWindow (h=300, w=300, title=0x804aee5 "torus", x=<optimized out>, y=<optimized out>) at eglut.c:162 #14 eglutCreateWindow (title=title@entry=0x804aee5 "torus") at eglut.c:317 #15 0x080493c7 in main (argc=1, argv=0xbffffbe4) at torus.c:435 Additional notes. The following fixes/workaround have been found: 0. to build mesa without debug support :-) 1. to build with explicit compiler flag -fno-omit-frame-pointer 2. to apply the following patch diff --git a/src/gallium/auxiliary/util/u_debug_stack.c b/src/gallium/auxiliary/util/u_debug_stack.c index 558b911..0a1e4e5 100644 --- a/src/gallium/auxiliary/util/u_debug_stack.c +++ b/src/gallium/auxiliary/util/u_debug_stack.c @@ -49,8 +49,7 @@ debug_backtrace_capture(struct debug_stack_frame *backtrace, return; #if defined(PIPE_CC_GCC) && defined(PIPE_ARCH_X86) - __asm__ __volatile__("mov (%%ebp),%0": "=r" (frame_pointer)); - frame_pointer = (const void **)frame_pointer[0]; + frame_pointer = ((const void **)__builtin_frame_address(1)); #elif defined(PIPE_CC_GCC) frame_pointer = ((const void **)__builtin_frame_address(1)); #elif defined(PIPE_CC_MSVC) && defined(PIPE_ARCH_X86)