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)