[Mesa-dev] [PATCH] nouveau: Use dup fd as key in drm-winsys hash table to fix ZaphodHeads.
Mario Kleiner
mario.kleiner.de at gmail.com
Sat Jun 27 20:13:43 PDT 2015
On 06/28/2015 03:48 AM, Ilia Mirkin wrote:
> On Fri, Jun 5, 2015 at 9:36 AM, Mario Kleiner
> <mario.kleiner.de at gmail.com> wrote:
>> The dup'ed fd owned by the nouveau_screen for a device node
>> must also be used as key for the winsys hash table, instead
>> of using the original fd passed in for a screen, to make
>> multi-x-screen ZaphodHeads configurations work on nouveau.
>>
>> This prevents the following crash scenario that was observed
>> when a dynamically loaded rendering plugin used OpenGL on a
>> ZaphodHeads setup, e.g., on a dual x-screen setup. At first
>> load the plugin worked, but after unloading and reloading it,
>> the next rendering operation crashed:
>>
>> 1. Client, e.g., a plugin, calls glXQueryVersion.
>>
>> 2. DRI screens for the x-screens 0 and 1 are created, one shared
>> nouveau_screen is created for the shared device node of both
>> screens, but the original fd of x-screen 0 is used as identifying
>> key in the hash table, instead of the dup()ed fd of x-screen 0
>> which is owned by the nouveau_screen. nouveau_screen's refcount
>> is now 2.
>
> See below, but it shouldn't matter which fd gets used.
>
>>
>> 3. Regular rendering happens by the client plugin, then the plugin
>> gets unloaded.
>>
>> 4. XCloseDisplay(). x-screen 0 gets its DRI screen destroyed,
>> nouveau_drm_screen_unref() drops the refcount to 1, calling mesa
>> code then closes the fd of x-screen 0, so now the fd which is
>> used as key in the hash table is invalid. x-screen 1 gets
>> destroyed, nouveau_drm_screen_unref() drops the refcount to 0,
>> the nouveau_screen gets destroyed, but removal of its entry
>> in the hash table fails, because the invalid fd in the hash
>> table no longer matches anything (fstat() on the fd is used
>> for hashing and key comparison, but fstat() on an already closed
>> fd fails and returns bogus results). x-screen 1 closes its fd.
>>
>> Now all fd's are closed, the nouveau_screen destroyed, but
>> there is a dangling reference to the nouveau_screen in the
>> hash table.
>>
>> 5. Some OpenGL client plugin gets loaded again and calls
>> glXQueryVersion. Step 2 above repeats, but because a
>> dangling reference with a matching fd is found in the winsys
>> hash table, no new nouveau_screen is created this time. Instead
>> the invalid pointer to the old nouveau_screen is recycled,
>> which points to nirvana -> Crash.
>>
>> This problem is avoided by use of the dup()ed fd which is
>> owned by the nouveau_screen and has the same lifetime as
>> the nouveau_screen itself.
>
> I need to think about this some more, but... this shouldn't happen :)
>
> In fact, the whole dupfd thing was added there for ZaphodHeads screens
> in the first place. See
> https://bugs.freedesktop.org/show_bug.cgi?id=79823 and commit
> a59f2bb17bcc which fixed it.
>
> Note that the hash has the following hash/eq functions:
>
> static unsigned hash_fd(void *key)
> {
> int fd = pointer_to_intptr(key);
> struct stat stat;
> fstat(fd, &stat);
>
> return stat.st_dev ^ stat.st_ino ^ stat.st_rdev;
> }
>
> static int compare_fd(void *key1, void *key2)
> {
> int fd1 = pointer_to_intptr(key1);
> int fd2 = pointer_to_intptr(key2);
> struct stat stat1, stat2;
> fstat(fd1, &stat1);
> fstat(fd2, &stat2);
>
> return stat1.st_dev != stat2.st_dev ||
> stat1.st_ino != stat2.st_ino ||
> stat1.st_rdev != stat2.st_rdev;
> }
>
> so fd and dupfd should get hashed to the same thing. I suspect there's
> something else going on in your application...
>
My application is a set of dynamically loaded plugins running inside
another host app (Psychtoolbox-3 inside GNU/Octave), so what happens
often is that the OpenGL using plugin gets unloaded and reloaded at
runtime, so a after a OpenGL session has ended with a XCloseDisplay()
tearing the winsys down, you can easily have it restart at plugin reload
with another XOpenDisplay -> glXQueryVersion -> .... sequence, where the
new call to glXQueryVersion will trigger a recreation of the winsys,
which will find the stale entry in the hash table pointing to nowhere
instead of the previously released nouveau_screen -> use-after-free -> boom!
The reason this fails is because during destruction of the 2nd, 3rd etc.
x-screen, the already closed fd associated with the 1st x-screen is fed
into the compare_fd function, so fstat() errors out on the invalid fd. I
added printf's etc. on both nouveau and now radeon to verify the fstat
gives me EBADF errors. So the hash calculation goes wrong when trying to
find the matching element in the hash table with a fd that has a
matching hash -> The element which should be removed is ignored/not
removed because it contains an already closed fd for which no proper
hash can be calculated anymore -> hash comparison during search goes wrong.
This is because multiple x-screens, e.g., 2 x-screens are destroyed in
order 0, 1 by FreeScreenConfigs() as part of XCloseDisplay().
FreeScreenConfigs() calls dri2DestroyScreen() in dri2.c or
dri3_destroy_screen in dri3.c, which are essentially identical, e.g.,:
static void
dri2DestroyScreen(struct glx_screen *base)
{
struct dri2_screen *psc = (struct dri2_screen *) base;
/* Free the direct rendering per screen data */
(*psc->core->destroyScreen) (psc->driScreen);
--> This core->destroyScreen calls eventually into the winsys, which
then drops the refcount of the nouveau_screen or radeon winsys structure
by one, and tries to release the struct and remove the hash table entry
once the refcount drops to zero.
driDestroyConfigs(psc->driver_configs);
close(psc->fd);
-> This close() closes the fd of a screen immediately after closing down
that screen. At the time screen 1 is closed down, the fd associated with
screen 0 is already closed.
free(psc);
}
So you have this sequence during creation:
glXQueryVersion() -> AllocAndFetchScreenConfigs():
create screen 0 and its fd, e.g., fd==5, dup(fd), e.g., fd==6 for the
nouveau_screen, but store x-screen 0's fd==5 *itself* in the hash table
as key.
create screen 1. This now creates an fd 7
=> refcount is now 2.
And this sequence during destruction at XCloseDisplay();
FreeScreenConfigs():
free screen 0: core->destroyScreen() -> ... ->
nouveau_drm_screen_unref() => refcount-- is now 1
close(fd==5) of screen 0 and thereby the fd==5 stored inside the hash
table as key. From now on using fcntl(fd==5) for hash calculation on
that element will malfunction.
free screen 1: -> nouveau_drm_screen_unref -> refcount-- is now 0. ->
Try to remove hash table entry => fails because fcntl(fd==5) on the
already closed fd==5 of screen 0 fails with EBADF. => Hash table keeps
its stale element referencing the struct nouveau_screen.
Free nouveau_screen struct (close dup()ed fd==6 for nouveau_screen,
close down stuff, free the struct).
-> close(fd==7) associated with screen 1.
Now all fd's (5,6,7) are closed, the struct is gone, the hash table
contains a stale element with a no longer existent fd==5 and a pointer
to an already free()d struct nouveau_screen.
Now we reload the plugin and do glXQueryVersion() again, so
AllocAndFetchScreenConfigs() is executed again to create the winsys etc.
for screens 0 and 1.
create screen 0 and its fd: Here the first unused fd in the
filedescriptor table is recycled, which happens to be fd==5, just as in
the first session with the plugin! Now suddenly fd=5 is again the valid
fd for x-screen 0, and it points to the same /dev/drm/card0 device file
as before. That means when nouveau_drm_screen_create(fd==5) is called,
it finds the stale element in the hash table from the previous session,
because the previously closed fd 5 in that element is now valid and open
again and points to the same device file as in the previous session,
ergo has the same hash etc. nouveau_drm_screen_create() concludes that a
fully initialized nouveau_screen already exists for this session, except
it doesn't exist - the pointer in the hash table points to invalid
previously freed memory. When it tries to access that memory we have a
use-after-free and the application segfaults.
So it depends a bit on what happens in the applications memory between
the two consecutive OpenGL sessions etc. how long it takes for an
invalid memory access to happen, but eventually it hits invalid data.
Maybe occassionally it gets lucky and the freed memory is still
accessible and the struct intact, so stuff works by chance.
If the application happened to open other files inbetween the 1st and
2nd session, then the relevant fd in the 2nd session may not be exactly
the same as in the first session, because recycling that fd didn't work,
so we are only left with a dead but harmless entry in the hash table
instead of a crasher. I assume something like that prevented my crashes
on radeon in the past, because when i wasn't expecting/looking for
trouble i didn't use a test sequence carefully made to trigger the bug
for certain.
Similar things happen on radeon for the same reason, ergo the 2nd patch
with a similar fix.
I don't have the gdb backtrace for nouveau anymore, but the traces for
radeon are attached to this mail to show you the flow of execution,
similar to nouveau.
-mario
-------------- next part --------------
Against Mesa git master DRI2:
Breakpoint 1, radeon_drm_winsys_create (fd=-517074139, screen_create=0x7fffe12e1337) at radeon_drm_winsys.c:678
678 {
(gdb) bt full
#0 radeon_drm_winsys_create (fd=-517074139, screen_create=0x7fffe12e1337) at radeon_drm_winsys.c:678
No locals.
#1 0x00007fffe0ced4fe in pipe_r600_create_screen (fd=5) at ../../../../src/gallium/auxiliary/target-helpers/inline_drm_helper.h:209
rw = 0x11eeee0
#2 dd_create_screen (fd=5) at ../../../../src/gallium/auxiliary/target-helpers/inline_drm_helper.h:364
No locals.
#3 0x00007fffe0f44363 in dri2_init_screen (sPriv=0x11eed20) at dri2.c:1458
configs = <optimized out>
screen = 0x11eef00
pscreen = 0x0
throttle_ret = 0x0
dmabuf_ret = 0x0
#4 0x00007fffe0f3ecf1 in driCreateNewScreen2 (scrn=0, fd=5, extensions=<optimized out>, driver_extensions=<optimized out>, driver_configs=0x7fffffffa950, data=0x1162400) at dri_util.c:159
emptyExtensionList = {0x0}
psp = 0x11eed20
consts = {MaxTextureMbytes = 24, MaxTextureLevels = 0, Max3DTextureLevels = 0, MaxCubeTextureLevels = 0, MaxArrayTextureLayers = 2147483906, MaxTextureRectSize = 0, MaxTextureCoordUnits = 4294944800, MaxCombinedTextureImageUnits = 32767, MaxTextureUnits = 4097458806,
MaxTextureMaxAnisotropy = 4,59163468e-41, MaxTextureLodBias = -9,01278779e+33, MaxTextureBufferSize = 32767, TextureBufferOffsetAlignment = 4294944304, MaxArrayLockSize = 32767, SubPixelBits = 509, MinPointSize = 0, MaxPointSize = 2,90701945e-38, MinPointSizeAA = 0,
MaxPointSizeAA = -1,15225159e+20, PointSizeGranularity = 4,59163468e-41, MinLineWidth = -1,15333879e+20, MaxLineWidth = 4,59163468e-41, MinLineWidthAA = -9,01421514e+33, MaxLineWidthAA = 4,59163468e-41, LineWidthGranularity = 7,13260918e-43, MaxClipPlanes = 0,
MaxLights = 3771208328, MaxShininess = 4,59163468e-41, MaxSpotExponent = 2,90701945e-38, MaxViewportWidth = 0, MaxViewportHeight = 4294944024, MaxViewports = 32767, ViewportSubpixelBits = 4294944020, ViewportBounds = {Min = 4,59163468e-41, Max = -nan(0x7fa5a8)},
Program = {{MaxInstructions = 32767, MaxAluInstructions = 4294944176, MaxTexInstructions = 32767, MaxTexIndirections = 18803952, MaxAttribs = 0, MaxTemps = 0, MaxAddressRegs = 0, MaxAddressOffset = 4294944024, MaxParameters = 32767, MaxLocalParams = 2336646085,
MaxEnvParams = 0, MaxNativeInstructions = 36510095, MaxNativeAluInstructions = 0, MaxNativeTexInstructions = 5, MaxNativeTexIndirections = 32767, MaxNativeAttribs = 4294944240, MaxNativeTemps = 32767, MaxNativeAddressRegs = 3771208328, MaxNativeParameters = 32767,
MaxUniformComponents = 4294944020, MaxInputComponents = 32767, MaxOutputComponents = 4294944224, LowFloat = {RangeMin = 32767, RangeMax = 0, Precision = 25936}, MediumFloat = {RangeMin = 286, RangeMax = 0, Precision = 0}, HighFloat = {RangeMin = 0, RangeMax = 0,
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RangeMin = 32767, RangeMax = 0, Precision = 42436}, LowInt = {RangeMin = 65535, RangeMax = 32767, Precision = 0}, MediumInt = {RangeMin = 0, RangeMax = 0, Precision = 0}, HighInt = {RangeMin = 0, RangeMax = 18808, Precision = 286}, MaxUniformBlocks = 0,
MaxCombinedUniformComponents = 4294944240, MaxTextureImageUnits = 32767, MaxAtomicBuffers = 98, MaxAtomicCounters = 0, MaxImageUniforms = 18761200}, {MaxInstructions = 0, MaxAluInstructions = 4294944224, MaxTexInstructions = 32767, MaxTexIndirections = 18803952,
MaxAttribs = 0, MaxTemps = 2336646085, MaxAddressRegs = 0, MaxAddressOffset = 4294967295, MaxParameters = 0, MaxLocalParams = 2096, MaxEnvParams = 0, MaxNativeInstructions = 3771208184, MaxNativeAluInstructions = 32767, MaxNativeTexInstructions = 18761200,
MaxNativeTexIndirections = 0, MaxNativeAttribs = 30, MaxNativeTemps = 0, MaxNativeAddressRegs = 4158535602, MaxNativeParameters = 32767, MaxUniformComponents = 2096, MaxInputComponents = 0, MaxOutputComponents = 4131417544, LowFloat = {RangeMin = 32767, RangeMax = 0,
Precision = 53248}, MediumFloat = {RangeMin = 63484, RangeMax = 32767, Precision = 0}, HighFloat = {RangeMin = 42680, RangeMax = 65535, Precision = 32767}, LowInt = {RangeMin = 0, RangeMax = 42676, Precision = 65535}, MediumInt = {RangeMin = 32767, RangeMax = 0,
Precision = 12608}, HighInt = {RangeMin = 63454, RangeMax = 32767, Precision = 0}, MaxUniformBlocks = 4294958488, MaxCombinedUniformComponents = 32767, MaxTextureImageUnits = 4097223151, MaxAtomicBuffers = 32767, MaxAtomicCounters = 4097180992,
MaxImageUniforms = 32767}, {MaxInstructions = 18803952, MaxAluInstructions = 0, MaxTexInstructions = 4160532480, MaxTexIndirections = 32767, MaxAttribs = 4160736448, MaxTemps = 32767, MaxAddressRegs = 0, MaxAddressOffset = 0, MaxParameters = 18761200,
MaxLocalParams = 0, MaxEnvParams = 4294944576, MaxNativeInstructions = 32767, MaxNativeAluInstructions = 4132672003, MaxNativeTexInstructions = 32767, MaxNativeTexIndirections = 2, MaxNativeAttribs = 0, MaxNativeTemps = 0, MaxNativeAddressRegs = 0,
MaxNativeParameters = 30, MaxUniformComponents = 0, MaxInputComponents = 4294945024, MaxOutputComponents = 32767, LowFloat = {RangeMin = 30, RangeMax = 0, Precision = 0}, MediumFloat = {RangeMin = 0, RangeMax = 2, Precision = 0}, HighFloat = {RangeMin = 32767,
RangeMax = 0, Precision = 1}, LowInt = {RangeMin = 0, RangeMax = 0, Precision = 0}, MediumInt = {RangeMin = 4600, RangeMax = 57544, Precision = 32767}, HighInt = {RangeMin = 0, RangeMax = 29, Precision = 0}, MaxUniformBlocks = 0,
MaxCombinedUniformComponents = 4294945024, MaxTextureImageUnits = 32767, MaxAtomicBuffers = 18803840, MaxAtomicCounters = 0, MaxImageUniforms = 4132497260}}, MaxProgramMatrices = 32767, MaxProgramMatrixStackDepth = 4222451712, QueryCounterBits = {
SamplesPassed = 32767, TimeElapsed = 18803840, Timestamp = 0, PrimitivesGenerated = 18803840, PrimitivesWritten = 0, VerticesSubmitted = 18803840, PrimitivesSubmitted = 0, VsInvocations = 18803840, TessPatches = 0, TessInvocations = 4294944960, GsInvocations = 32767,
GsPrimitives = 4294944960, FsInvocations = 32767, ComputeInvocations = 0, ClInPrimitives = 0, ClOutPrimitives = 4094613840}, MaxDrawBuffers = 32767, MaxColorAttachments = 18228224, MaxRenderbufferSize = 0, MaxSamples = 4038328544, MaxVarying = 32767,
MaxCombinedUniformBlocks = 4038328564, MaxUniformBufferBindings = 32767, MaxUniformBlockSize = 0, UniformBufferOffsetAlignment = 0, MaxUserAssignableUniformLocations = 4158559332, MaxGeometryOutputVertices = 32767, MaxGeometryTotalOutputComponents = 4160532480,
GLSLVersion = 4, ForceGLSLExtensionsWarn = 88 'X', ForceGLSLVersion = 32767, AllowGLSLExtensionDirectiveMidShader = 0 '\000', NativeIntegers = 0 '\000', VertexID_is_zero_based = false, UniformBooleanTrue = 0, MaxServerWaitTimeout = 8895248,
QuadsFollowProvokingVertexConvention = 24 '\030', ContextFlags = 0, ProfileMask = 8895240, MaxVertexAttribStride = 0, MaxTransformFeedbackBuffers = 4038328544, MaxTransformFeedbackSeparateComponents = 32767, MaxTransformFeedbackInterleavedComponents = 4294944960,
MaxVertexStreams = 32767, MinProgramTexelOffset = 8895232, MaxProgramTexelOffset = 0, MinProgramTextureGatherOffset = 8895248, MaxProgramTextureGatherOffset = 0, MaxProgramTextureGatherComponents = 8895256, ResetStrategy = 0, MaxDualSourceDrawBuffers = 8895240,
StripTextureBorder = 0 '\000', GLSLSkipStrictMaxUniformLimitCheck = 0 '\000', AlwaysUseGetTransformFeedbackVertexCount = 0 '\000', MinMapBufferAlignment = 4294944676, DisableVaryingPacking = 255 '\377', GenerateTemporaryNames = 127, MaxElementIndex = 0,
DisableGLSLLineContinuations = 20 '\024', MaxColorTextureSamples = -1124881641, MaxDepthTextureSamples = -22336, MaxIntegerSamples = 32767, SampleMap2x = "\000", SampleMap4x = "\000\000\000", SampleMap8x = "\000\000P\331\016\364\377\177",
MaxAtomicBufferBindings = 18228224, MaxAtomicBufferSize = 0, MaxCombinedAtomicBuffers = 3834321940, MaxCombinedAtomicCounters = 3170088320, MaxVertexAttribRelativeOffset = -2098652140, MaxVertexAttribBindings = -1124883006, MaxImageUnits = 4094613840,
MaxCombinedImageUnitsAndFragmentOutputs = 0, MaxImageSamples = 18228224, MaxCombinedImageUniforms = 0, MaxComputeWorkGroupCount = {4132496930, 32767, 0}, MaxComputeWorkGroupSize = {0, 24, 48}, MaxComputeWorkGroupInvocations = 4294945024,
MinFragmentInterpolationOffset = 4,59163468e-41, MaxFragmentInterpolationOffset = -nan(0x7fa840), FakeSWMSAA = 255 '\377', ContextReleaseBehavior = 1818322735, ShaderCompilerOptions = {{EmitCondCodes = 176 '\260', EmitNoLoops = 97 'a', EmitNoFunctions = 64 '@',
EmitNoCont = 246 '\366', EmitNoMainReturn = 255 '\377', EmitNoNoise = 127 '\177', EmitNoPow = 0 '\000', EmitNoSat = 0 '\000', LowerClipDistance = 240 '\360', EmitNoIndirectInput = 69 'E', EmitNoIndirectOutput = 30 '\036', EmitNoIndirectTemp = 1 '\001',
EmitNoIndirectUniform = 0 '\000', MaxIfDepth = 4097676651, MaxUnrollIterations = 32767, OptimizeForAOS = 32 ' ', NirOptions = 0x7ffff0b40090 <dlclose_doit>}, {EmitCondCodes = 207 '\317', EmitNoLoops = 5 '\005', EmitNoFunctions = 192 '\300', EmitNoCont = 52 '4',
EmitNoMainReturn = 0 '\000', EmitNoNoise = 0 '\000', EmitNoPow = 0 '\000', EmitNoSat = 0 '\000', LowerClipDistance = 240 '\360', EmitNoIndirectInput = 69 'E', EmitNoIndirectOutput = 30 '\036', EmitNoIndirectTemp = 1 '\001', EmitNoIndirectUniform = 0 '\000',
MaxIfDepth = 3771650928, MaxUnrollIterations = 32767, OptimizeForAOS = 32 ' ', NirOptions = 0x0}, {EmitCondCodes = 80 'P', EmitNoLoops = 217 '\331', EmitNoFunctions = 14 '\016', EmitNoCont = 244 '\364', EmitNoMainReturn = 255 '\377', EmitNoNoise = 127 '\177',
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NirOptions = 0x7fffe0ced370 <__driDriverGetExtensions_r600>}}}
api = API_OPENGLES
version = 0
#5 0x00007ffff43a73b1 in dri2CreateScreen (screen=0, priv=0x1160f60) at ../../../../src/glx/dri2_glx.c:1243
driver_configs = 0x4
extensions = <optimized out>
pdp = 0x1162250
psc = 0x1162400
psp = <optimized out>
configs = 0x0
visuals = 0x0
driverName = 0x1162e20 "r600"
loader_driverName = <optimized out>
deviceName = 0x11623b0 "/dev/dri/card0"
tmp = <optimized out>
magic = 3
i = <optimized out>
---Type <return> to continue, or q <return> to quit---
#6 0x00007ffff437d154 in AllocAndFetchScreenConfigs (priv=0x1160f60, dpy=0x114c220) at ../../../../src/glx/glxext.c:796
psc = <optimized out>
i = 0
screens = 1
#7 __glXInitialize (dpy=0x114c220) at ../../../../src/glx/glxext.c:907
i = <optimized out>
dpyPriv = 0x1160f60
d = <optimized out>
glx_direct = <optimized out>
glx_accel = <optimized out>
dpy = 0x114c220
dpyPriv = <optimized out>
#8 0x00007ffff43789d1 in glXQueryVersion (dpy=<optimized out>, major=major at entry=0x7fffffffaab4, minor=minor at entry=0x7fffffffaab8) at ../../../../src/glx/glxcmds.c:487
priv = <optimized out>
#9 0x00007fffe41e213d in PsychOSOpenOnscreenWindow (screenSettings=screenSettings at entry=0x7fffffffc080, windowRecord=0x1160090, numBuffers=numBuffers at entry=2, stereomode=stereomode at entry=0, conserveVRAM=conserveVRAM at entry=0) at Linux/Screen/PsychWindowGlue.c:395
windowTitle = "PTB Onscreen Window [10]:\000\000\000\000\000\000"
screenrect = {6,9533490690450071e-310, 6,9533487282518644e-310, 6,9533479393231969e-310, 2,515341373005088e+172}
dpy = 0x114c220
scrnum = 0
attr = {background_pixmap = 121, background_pixel = 140737345074665, border_pixmap = 6616736, border_pixel = 7186066037675116288, bit_gravity = 18435416, win_gravity = 0, backing_store = -143280310, backing_planes = 0, backing_pixel = 1, save_under = 0,
event_mask = 140737329510137, do_not_propagate_mask = 140737331819416, override_redirect = 6490928, colormap = 6490928, cursor = 7186066037675116288}
mask = <optimized out>
root = <optimized out>
win = <optimized out>
ctx = <optimized out>
fbconfig = 0x0
glxwindow = 0
visinfo = 0x0
i = <optimized out>
x = <optimized out>
y = <optimized out>
width = <optimized out>
height = <optimized out>
nrconfigs = 0
buffdepth = -156535912
glerr = <optimized out>
attrib = {-21472, 32767, 1, 0, 6490928, 0, 6490928, 0, 121, 0, -21472, 32767, -16560, 32767, 6490912, 0, -16256, 32767, 2, 0, 0, 0, 0, 0, -16560, 32767, -163075940, 32767, 0, 0, -467679488, 1673136380, 1701604096, 1919250025, 6490912, 0, -16256, 32767, 6490912, 0, -16256}
attribcount = 0
stereoenableattrib = 0
depth = 24
bpc = <optimized out>
windowLevel = 1249
major = 0
minor = 0
xfixes_event_base1 = 87
xfixes_event_base2 = 140
xfixes_available = 1 '\001'
newstyle_setup = 0 '\000'
gpuMaintype = 0
mwmHintsProperty = <optimized out>
hints = {flags = 12522416, functions = 140737329338018, decorations = 140737488333569, input_mode = 12522400, status = 140737488333856}
crtc_info = 0x63ba08fce41fc700
mode = <optimized out>
clear all
octave:3> clear all
[New Thread 0x7fffde215700 (LWP 4949)]
Breakpoint 2, radeon_winsys_unref (ws=0x11f0200) at radeon_drm_winsys.c:658
658 {
(gdb) bt full
#0 radeon_winsys_unref (ws=0x11f0200) at radeon_drm_winsys.c:658
rws = <optimized out>
destroy = <optimized out>
#1 0x00007fffe11ac256 in r600_destroy_screen (pscreen=0x11f0200) at r600_pipe.c:510
No locals.
#2 0x00007fffe0f4296f in dri_destroy_screen_helper (screen=screen at entry=0x11eef00) at dri_screen.c:365
No locals.
#3 0x00007fffe0f42a15 in dri_destroy_screen (sPriv=0x11eed20) at dri_screen.c:376
No locals.
#4 0x00007fffe0f3eb07 in driDestroyScreen (psp=0x11eed20) at dri_util.c:243
No locals.
#5 0x00007ffff43a6c92 in dri2DestroyScreen (base=0x1162400) at ../../../../src/glx/dri2_glx.c:710
psc = 0x1162400
#6 0x00007ffff437ccb6 in FreeScreenConfigs (priv=0x1160f60, priv=0x1160f60) at ../../../../src/glx/glxext.c:214
psc = 0x1162400
i = <optimized out>
screens = <optimized out>
#7 0x00007ffff437cd39 in glx_display_free (priv=priv at entry=0x1160f60) at ../../../../src/glx/glxext.c:237
gc = <optimized out>
#8 0x00007ffff437ce8e in __glXCloseDisplay (dpy=0x114c220, codes=<optimized out>) at ../../../../src/glx/glxext.c:285
priv = 0x1160f60
prev = <optimized out>
#9 0x00007ffff3dd05e2 in XCloseDisplay () from /usr/lib/x86_64-linux-gnu/libX11.so.6
No symbol table info available.
#10 0x00007fffe41ddf73 in PsychCleanupDisplayGlue () at Linux/Screen/PsychScreenGlue.c:1394
dpy = 0x114c220
last_dpy = 0x114c220
i = 0
#11 0x00007fffe42392da in ScreenExitFunction () at Common/Screen/ScreenExit.c:40
TRACE on DRI3/Present:
PTB-INFO: Connected to Advanced Micro Devices, Inc. [AMD/ATI] Juniper XT [Radeon HD 5770] GPU with DCE-4 display engine [6 heads]. Beamposition timestamping enabled.
Breakpoint 1, radeon_drm_winsys_create (fd=-517074139, screen_create=0x7fffe12e1337) at radeon_drm_winsys.c:678
678 {
(gdb) bt full
#0 radeon_drm_winsys_create (fd=-517074139, screen_create=0x7fffe12e1337) at radeon_drm_winsys.c:678
No locals.
#1 0x00007fffe0ced4fe in pipe_r600_create_screen (fd=5) at ../../../../src/gallium/auxiliary/target-helpers/inline_drm_helper.h:209
rw = 0x11de020
#2 dd_create_screen (fd=5) at ../../../../src/gallium/auxiliary/target-helpers/inline_drm_helper.h:364
No locals.
#3 0x00007fffe0f44363 in dri2_init_screen (sPriv=0x11dde60) at dri2.c:1458
configs = <optimized out>
screen = 0x11de040
pscreen = 0x0
throttle_ret = 0x0
dmabuf_ret = 0x0
#4 0x00007fffe0f3ecf1 in driCreateNewScreen2 (scrn=0, fd=5, extensions=<optimized out>, driver_extensions=<optimized out>, driver_configs=0x7fffffffa960, data=0x1162420) at dri_util.c:159
emptyExtensionList = {0x0}
psp = 0x11dde60
consts = {MaxTextureMbytes = 24, MaxTextureLevels = 0, Max3DTextureLevels = 0, MaxCubeTextureLevels = 0, MaxArrayTextureLayers = 2147483906, MaxTextureRectSize = 0, MaxTextureCoordUnits = 4294944832, MaxCombinedTextureImageUnits = 32767, MaxTextureUnits = 4097458806,
MaxTextureMaxAnisotropy = 4,59163468e-41, MaxTextureLodBias = -9,01278779e+33, MaxTextureBufferSize = 32767, TextureBufferOffsetAlignment = 4294944336, MaxArrayLockSize = 32767, SubPixelBits = 509, MinPointSize = 0, MaxPointSize = 2,89675522e-38, MinPointSizeAA = 0,
MaxPointSizeAA = -1,15225159e+20, PointSizeGranularity = 4,59163468e-41, MinLineWidth = -1,15333879e+20, MaxLineWidth = 4,59163468e-41, MinLineWidthAA = -9,01421514e+33, MaxLineWidthAA = 4,59163468e-41, LineWidthGranularity = 7,13260918e-43, MaxClipPlanes = 0,
MaxLights = 3771208328, MaxShininess = 4,59163468e-41, MaxSpotExponent = 2,89675522e-38, MaxViewportWidth = 0, MaxViewportHeight = 4294944056, MaxViewports = 32767, ViewportSubpixelBits = 4294944052, ViewportBounds = {Min = 4,59163468e-41, Max = -nan(0x7fa5c8)},
Program = {{MaxInstructions = 32767, MaxAluInstructions = 4294944208, MaxTexInstructions = 32767, MaxTexIndirections = 18734640, MaxAttribs = 0, MaxTemps = 0, MaxAddressRegs = 0, MaxAddressOffset = 4294944056, MaxParameters = 32767, MaxLocalParams = 2336646085,
MaxEnvParams = 0, MaxNativeInstructions = 36510095, MaxNativeAluInstructions = 0, MaxNativeTexInstructions = 5, MaxNativeTexIndirections = 32767, MaxNativeAttribs = 4294944272, MaxNativeTemps = 32767, MaxNativeAddressRegs = 3771208328, MaxNativeParameters = 32767,
MaxUniformComponents = 4294944052, MaxInputComponents = 32767, MaxOutputComponents = 4294944256, LowFloat = {RangeMin = 32767, RangeMax = 0, Precision = 11280}, MediumFloat = {RangeMin = 287, RangeMax = 0, Precision = 0}, HighFloat = {RangeMin = 0, RangeMax = 0,
Precision = 0}, LowInt = {RangeMin = 0, RangeMax = 21, Precision = 0}, MediumInt = {RangeMin = 0, RangeMax = 0, Precision = 63152}, HighInt = {RangeMin = 61619, RangeMax = 0, Precision = 0}, MaxUniformBlocks = 0, MaxCombinedUniformComponents = 0,
MaxTextureImageUnits = 27, MaxAtomicBuffers = 0, MaxAtomicCounters = 18725480, MaxImageUniforms = 0}, {MaxInstructions = 4294944416, MaxAluInstructions = 32767, MaxTexInstructions = 0, MaxTexIndirections = 0, MaxAttribs = 2, MaxTemps = 0, MaxAddressRegs = 0,
MaxAddressOffset = 0, MaxParameters = 4294944488, MaxLocalParams = 32767, MaxEnvParams = 4158536705, MaxNativeInstructions = 32767, MaxNativeAluInstructions = 0, MaxNativeTexInstructions = 0, MaxNativeTexIndirections = 0, MaxNativeAttribs = 0, MaxNativeTemps = 2,
MaxNativeAddressRegs = 0, MaxNativeParameters = 0, MaxUniformComponents = 0, MaxInputComponents = 0, MaxOutputComponents = 0, LowFloat = {RangeMin = 46816, RangeMax = 285, Precision = 0}, MediumFloat = {RangeMin = 0, RangeMax = 63152, Precision = 61619}, HighFloat = {
RangeMin = 32767, RangeMax = 0, Precision = 42468}, LowInt = {RangeMin = 65535, RangeMax = 32767, Precision = 0}, MediumInt = {RangeMin = 0, RangeMax = 0, Precision = 0}, HighInt = {RangeMin = 0, RangeMax = 47720, Precision = 285}, MaxUniformBlocks = 0,
MaxCombinedUniformComponents = 4294944272, MaxTextureImageUnits = 32767, MaxAtomicBuffers = 98, MaxAtomicCounters = 0, MaxImageUniforms = 18724576}, {MaxInstructions = 0, MaxAluInstructions = 4294944256, MaxTexInstructions = 32767, MaxTexIndirections = 18734640,
MaxAttribs = 0, MaxTemps = 2336646085, MaxAddressRegs = 0, MaxAddressOffset = 4294967295, MaxParameters = 0, MaxLocalParams = 2096, MaxEnvParams = 0, MaxNativeInstructions = 3771208184, MaxNativeAluInstructions = 32767, MaxNativeTexInstructions = 18724576,
MaxNativeTexIndirections = 0, MaxNativeAttribs = 30, MaxNativeTemps = 0, MaxNativeAddressRegs = 4158535602, MaxNativeParameters = 32767, MaxUniformComponents = 2096, MaxInputComponents = 0, MaxOutputComponents = 4131417544, LowFloat = {RangeMin = 32767, RangeMax = 0,
Precision = 53248}, MediumFloat = {RangeMin = 63484, RangeMax = 32767, Precision = 0}, HighFloat = {RangeMin = 42712, RangeMax = 65535, Precision = 32767}, LowInt = {RangeMin = 0, RangeMax = 42708, Precision = 65535}, MediumInt = {RangeMin = 32767, RangeMax = 0,
Precision = 12608}, HighInt = {RangeMin = 63454, RangeMax = 32767, Precision = 0}, MaxUniformBlocks = 4294958488, MaxCombinedUniformComponents = 32767, MaxTextureImageUnits = 4097223151, MaxAtomicBuffers = 32767, MaxAtomicCounters = 4097180992,
MaxImageUniforms = 32767}, {MaxInstructions = 18734640, MaxAluInstructions = 0, MaxTexInstructions = 4160532480, MaxTexIndirections = 32767, MaxAttribs = 4160736448, MaxTemps = 32767, MaxAddressRegs = 0, MaxAddressOffset = 0, MaxParameters = 18724576,
MaxLocalParams = 0, MaxEnvParams = 4294944608, MaxNativeInstructions = 32767, MaxNativeAluInstructions = 4132672003, MaxNativeTexInstructions = 32767, MaxNativeTexIndirections = 2, MaxNativeAttribs = 0, MaxNativeTemps = 0, MaxNativeAddressRegs = 0,
MaxNativeParameters = 30, MaxUniformComponents = 0, MaxInputComponents = 4294945056, MaxOutputComponents = 32767, LowFloat = {RangeMin = 30, RangeMax = 0, Precision = 0}, MediumFloat = {RangeMin = 0, RangeMax = 2, Precision = 0}, HighFloat = {RangeMin = 32767,
RangeMax = 0, Precision = 1}, LowInt = {RangeMin = 0, RangeMax = 0, Precision = 0}, MediumInt = {RangeMin = 4600, RangeMax = 57544, Precision = 32767}, HighInt = {RangeMin = 0, RangeMax = 29, Precision = 0}, MaxUniformBlocks = 0,
MaxCombinedUniformComponents = 4294945056, MaxTextureImageUnits = 32767, MaxAtomicBuffers = 18734528, MaxAtomicCounters = 0, MaxImageUniforms = 4132497260}}, MaxProgramMatrices = 32767, MaxProgramMatrixStackDepth = 4222451712, QueryCounterBits = {
SamplesPassed = 32767, TimeElapsed = 18734528, Timestamp = 0, PrimitivesGenerated = 18734528, PrimitivesWritten = 0, VerticesSubmitted = 18734528, PrimitivesSubmitted = 0, VsInvocations = 18734528, TessPatches = 0, TessInvocations = 4294944992, GsInvocations = 32767,
GsPrimitives = 4294944992, FsInvocations = 32767, ComputeInvocations = 5, ClInPrimitives = 0, ClOutPrimitives = 725}, MaxDrawBuffers = 0, MaxColorAttachments = 18228256, MaxRenderbufferSize = 0, MaxSamples = 4038328544, MaxVarying = 32767,
MaxCombinedUniformBlocks = 4038328564, MaxUniformBufferBindings = 32767, MaxUniformBlockSize = 0, UniformBufferOffsetAlignment = 0, MaxUserAssignableUniformLocations = 4158559332, MaxGeometryOutputVertices = 32767, MaxGeometryTotalOutputComponents = 4160532480,
GLSLVersion = 4, ForceGLSLExtensionsWarn = 88 'X', ForceGLSLVersion = 32767, AllowGLSLExtensionDirectiveMidShader = 0 '\000', NativeIntegers = 0 '\000', VertexID_is_zero_based = false, UniformBooleanTrue = 0, MaxServerWaitTimeout = 8895248,
QuadsFollowProvokingVertexConvention = 24 '\030', ContextFlags = 0, ProfileMask = 8895240, MaxVertexAttribStride = 0, MaxTransformFeedbackBuffers = 4038328544, MaxTransformFeedbackSeparateComponents = 32767, MaxTransformFeedbackInterleavedComponents = 4294944992,
MaxVertexStreams = 32767, MinProgramTexelOffset = 8895232, MaxProgramTexelOffset = 0, MinProgramTextureGatherOffset = 8895248, MaxProgramTextureGatherOffset = 0, MaxProgramTextureGatherComponents = 8895256, ResetStrategy = 0, MaxDualSourceDrawBuffers = 8895240,
StripTextureBorder = 0 '\000', GLSLSkipStrictMaxUniformLimitCheck = 0 '\000', AlwaysUseGetTransformFeedbackVertexCount = 0 '\000', MinMapBufferAlignment = 4294944708, DisableVaryingPacking = 255 '\377', GenerateTemporaryNames = 127, MaxElementIndex = 0,
DisableGLSLLineContinuations = 133 '\205', MaxColorTextureSamples = 701763944, MaxDepthTextureSamples = -22304, MaxIntegerSamples = 32767, SampleMap2x = "\005", SampleMap4x = "\000\000\000", SampleMap8x = "\000\000\325\002\000\000\000",
MaxAtomicBufferBindings = 18228256, MaxAtomicBufferSize = 0, MaxCombinedAtomicBuffers = 4024415877, MaxCombinedAtomicCounters = 701763583, MaxVertexAttribRelativeOffset = -2005027195, MaxVertexAttribBindings = 701767613, MaxImageUnits = 725,
MaxCombinedImageUnitsAndFragmentOutputs = 0, MaxImageSamples = 18228256, MaxCombinedImageUniforms = 0, MaxComputeWorkGroupCount = {4132496930, 32767, 0}, MaxComputeWorkGroupSize = {0, 24, 48}, MaxComputeWorkGroupInvocations = 4294945056,
MinFragmentInterpolationOffset = 4,59163468e-41, MaxFragmentInterpolationOffset = -nan(0x7fa860), FakeSWMSAA = 255 '\377', ContextReleaseBehavior = 1818322735, ShaderCompilerOptions = {{EmitCondCodes = 176 '\260', EmitNoLoops = 97 'a', EmitNoFunctions = 64 '@',
EmitNoCont = 246 '\366', EmitNoMainReturn = 255 '\377', EmitNoNoise = 127 '\177', EmitNoPow = 0 '\000', EmitNoSat = 0 '\000', LowerClipDistance = 224 '\340', EmitNoIndirectInput = 182 '\266', EmitNoIndirectOutput = 29 '\035', EmitNoIndirectTemp = 1 '\001',
EmitNoIndirectUniform = 0 '\000', MaxIfDepth = 4097676651, MaxUnrollIterations = 32767, OptimizeForAOS = 0 '\000', NirOptions = 0x7ffff0b40090 <dlclose_doit>}, {EmitCondCodes = 207 '\317', EmitNoLoops = 5 '\005', EmitNoFunctions = 192 '\300', EmitNoCont = 52 '4',
EmitNoMainReturn = 0 '\000', EmitNoNoise = 0 '\000', EmitNoPow = 0 '\000', EmitNoSat = 0 '\000', LowerClipDistance = 224 '\340', EmitNoIndirectInput = 182 '\266', EmitNoIndirectOutput = 29 '\035', EmitNoIndirectTemp = 1 '\001', EmitNoIndirectUniform = 0 '\000',
MaxIfDepth = 3771650928, MaxUnrollIterations = 32767, OptimizeForAOS = 80 'P', NirOptions = 0x5}, {EmitCondCodes = 213 '\325', EmitNoLoops = 2 '\002', EmitNoFunctions = 0 '\000', EmitNoCont = 0 '\000', EmitNoMainReturn = 0 '\000', EmitNoNoise = 0 '\000',
EmitNoPow = 0 '\000', EmitNoSat = 0 '\000', LowerClipDistance = 32 ' ', EmitNoIndirectInput = 36 '$', EmitNoIndirectOutput = 22 '\026', EmitNoIndirectTemp = 1 '\001', EmitNoIndirectUniform = 0 '\000', MaxIfDepth = 4131891356, MaxUnrollIterations = 32767,
OptimizeForAOS = 80 'P', NirOptions = 0x7ffff0b4015d <__dlsym+93>}, {EmitCondCodes = 224 '\340', EmitNoLoops = 182 '\266', EmitNoFunctions = 29 '\035', EmitNoCont = 1 '\001', EmitNoMainReturn = 0 '\000', EmitNoNoise = 0 '\000', EmitNoPow = 0 '\000',
EmitNoSat = 0 '\000', LowerClipDistance = 48 '0', EmitNoIndirectInput = 222 '\336', EmitNoIndirectOutput = 29 '\035', EmitNoIndirectTemp = 1 '\001', EmitNoIndirectUniform = 0 '\000', MaxIfDepth = 4097459048, MaxUnrollIterations = 32767, OptimizeForAOS = 224 '\340',
NirOptions = 0x7fffe0ced370 <__driDriverGetExtensions_r600>}}}
api = API_OPENGLES
version = 0
#5 0x00007ffff43ac2f1 in dri3_create_screen (screen=0, priv=<optimized out>) at ../../../../src/glx/dri3_glx.c:1961
c = <optimized out>
driver_configs = 0x1162400
extensions = <optimized out>
pdp = 0x11621d0
psc = 0x1162420
psp = <optimized out>
configs = 0x0
visuals = 0x0
driverName = 0x1162e00 "r600"
deviceName = 0x0
tmp = <optimized out>
i = <optimized out>
#6 0x00007ffff437d121 in AllocAndFetchScreenConfigs (priv=0x1160f80, dpy=0x114c400) at ../../../../src/glx/glxext.c:793
---Type <return> to continue, or q <return> to quit---
psc = 0x0
i = 0
screens = 1
#7 __glXInitialize (dpy=0x114c400) at ../../../../src/glx/glxext.c:907
i = <optimized out>
dpyPriv = 0x1160f80
d = <optimized out>
glx_direct = <optimized out>
glx_accel = <optimized out>
dpy = 0x114c400
dpyPriv = <optimized out>
#8 0x00007ffff43789d1 in glXQueryVersion (dpy=<optimized out>, major=major at entry=0x7fffffffaab4, minor=minor at entry=0x7fffffffaab8) at ../../../../src/glx/glxcmds.c:487
priv = <optimized out>
#9 0x00007fffe41e213d in PsychOSOpenOnscreenWindow (screenSettings=screenSettings at entry=0x7fffffffc080, windowRecord=0x11600b0, numBuffers=numBuffers at entry=2, stereomode=stereomode at entry=0, conserveVRAM=conserveVRAM at entry=0) at Linux/Screen/PsychWindowGlue.c:395
windowTitle = "PTB Onscreen Window [10]:\000\000\000\000\000\000"
screenrect = {6,9533490690450071e-310, 6,9533487282518644e-310, 6,9533479393231969e-310, 1,5586514507704953e+164}
dpy = 0x114c400
scrnum = 0
attr = {background_pixmap = 121, background_pixel = 140737345074665, border_pixmap = 6616736, border_pixel = 7063235439763141888, bit_gravity = 18435048, win_gravity = 0, backing_store = -143280310, backing_planes = 0, backing_pixel = 1, save_under = 0,
event_mask = 140737329510137, do_not_propagate_mask = 140737331819416, override_redirect = 6490928, colormap = 6490928, cursor = 7063235439763141888}
mask = <optimized out>
root = <optimized out>
win = <optimized out>
ctx = <optimized out>
fbconfig = 0x0
glxwindow = 0
visinfo = 0x0
i = <optimized out>
x = <optimized out>
y = <optimized out>
width = <optimized out>
height = <optimized out>
nrconfigs = 0
buffdepth = -156535912
glerr = <optimized out>
attrib = {-21472, 32767, 1, 0, 6490928, 0, 6490928, 0, 121, 0, -21472, 32767, -16560, 32767, 6490912, 0, -16256, 32767, 2, 0, 0, 0, 0, 0, -16560, 32767, -163075940, 32767, 0, 0, -1207421696, 1644537653, 1701604096, 1919250025, 6490912, 0, -16256, 32767, 6490912, 0, -16256}
attribcount = 0
stereoenableattrib = 0
depth = 24
bpc = <optimized out>
windowLevel = 1249
major = 0
minor = 0
xfixes_event_base1 = 87
xfixes_event_base2 = 140
xfixes_available = 1 '\001'
newstyle_setup = 0 '\000'
gpuMaintype = 0
mwmHintsProperty = <optimized out>
hints = {flags = 12522784, functions = 140737329338018, decorations = 140737488333569, input_mode = 12522768, status = 140737488333856}
crtc_info = 0x6205a735b8083500
clear all
octave:3> clear all
[New Thread 0x7fffde215700 (LWP 5534)]
Breakpoint 2, radeon_winsys_unref (ws=0x11de350) at radeon_drm_winsys.c:658
658 {
(gdb) bt full
#0 radeon_winsys_unref (ws=0x11de350) at radeon_drm_winsys.c:658
rws = <optimized out>
destroy = <optimized out>
#1 0x00007fffe11ac256 in r600_destroy_screen (pscreen=0x11de350) at r600_pipe.c:510
No locals.
#2 0x00007fffe0f4296f in dri_destroy_screen_helper (screen=screen at entry=0x11de040) at dri_screen.c:365
No locals.
#3 0x00007fffe0f42a15 in dri_destroy_screen (sPriv=0x11dde60) at dri_screen.c:376
No locals.
#4 0x00007fffe0f3eb07 in driDestroyScreen (psp=0x11dde60) at dri_util.c:243
No locals.
#5 0x00007ffff43aade2 in dri3_destroy_screen (base=0x1162420) at ../../../../src/glx/dri3_glx.c:1694
psc = 0x1162420
#6 0x00007ffff437ccb6 in FreeScreenConfigs (priv=0x1160f80, priv=0x1160f80) at ../../../../src/glx/glxext.c:214
psc = 0x1162420
i = <optimized out>
screens = <optimized out>
#7 0x00007ffff437cd39 in glx_display_free (priv=priv at entry=0x1160f80) at ../../../../src/glx/glxext.c:237
gc = <optimized out>
#8 0x00007ffff437ce8e in __glXCloseDisplay (dpy=0x114c400, codes=<optimized out>) at ../../../../src/glx/glxext.c:285
priv = 0x1160f80
prev = <optimized out>
#9 0x00007ffff3dd05e2 in XCloseDisplay () from /usr/lib/x86_64-linux-gnu/libX11.so.6
No symbol table info available.
#10 0x00007fffe41ddf73 in PsychCleanupDisplayGlue () at Linux/Screen/PsychScreenGlue.c:1394
dpy = 0x114c400
last_dpy = 0x114c400
i = 0
#11 0x00007fffe42392da in ScreenExitFunction () at Common/Screen/ScreenExit.c:40
No locals.
#12 0x00007fffe4275e00 in PsychExit () at Common/Base/PsychInit.c:65
projectExit = <optimized out>
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