| Summary: | [piglit] shaders/glsl-array-bounds-02 (+even nrs) produces TRAP , TRAP_MP - TP0: Unhandled ustatus 0x00000001 | ||||||
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| Product: | xorg | Reporter: | dirkneukirchen | ||||
| Component: | Driver/nouveau | Assignee: | Nouveau Project <nouveau> | ||||
| Status: | RESOLVED NOTABUG | QA Contact: | Xorg Project Team <xorg-team> | ||||
| Severity: | normal | ||||||
| Priority: | medium | ||||||
| Version: | git | ||||||
| Hardware: | x86 (IA32) | ||||||
| OS: | All | ||||||
| Whiteboard: | |||||||
| i915 platform: | i915 features: | ||||||
| Attachments: |
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The big difference between the even and odd numbered shaders/glsl-array-bounds-* seems to be how the invalid index comes about.
In the odd-numbered ones, it comes directly from shader code, e.g.:
void main() {
int idx = 20;
array[idx]
}
In the even-numbered ones, it comes from a uniform that I guess is passed in:
uniform int idx;
void main() {
array[idx]
}
(And the various tests check fragment/vertex shaders, positive/negative offsets, and the place where the idx comes from, so 8 tests total.)
Although I'm not sure there's actually a problem here... the program is doing something illegal. You get segfault notifications in dmesg too...
Is this still a bug with recent kernels and other software? Please retest with 3.19-rc4 as there were some fixes for these chips in particular. Noted on IRC by pmoureau:
Tests {2-8} are working fine while {10, 12} are still failing with a similar error on MCP79/7A (the closest we got)
The piglit test got changed in the meanwhile. It's an out-of-bounds access, I think the error in dmesg is legit...ish. Not sure. We could turn off error reporting, which afaik is what the blob does. We don't disable error reporting, so you'll see stuff like that in dmesg. Expected. |
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Created attachment 84353 [details] dmesg with many instances of problem occuring (while isolating the piglit testcase) ./piglit-run.py --no-concurrency -t '^shaders/glsl-array-bounds-02' tests/quick.tests results/quick-shaders-array.tests and all other even numbered cases glsl-array-bounds-04 glsl-array-bounds-06 glsl-array-bounds-08 print out success but get a kernel log entry like [ 4653.971680] nouveau E[ PGRAPH][0000:02:00.0] TRAP_MP - TP0: Unhandled ustatus 0x00000001 [ 4653.971688] nouveau E[ PGRAPH][0000:02:00.0] TRAP [ 4653.971695] nouveau E[ PGRAPH][0000:02:00.0] ch 5 [0x0007814000 shader_runner[8809]] subc 3 class 0x8397 mthd 0x15e0 data 0x00000000 found with heavy use of exclude -x feature :) Hardware: Nvidia 8200 Onboard NVAA/NV50 nouveau [ DEVICE][0000:02:00.0] Chipset: MCP77/MCP78 (NVAA) nouveau [ DEVICE][0000:02:00.0] Family : NV50 Software: Linux Mint 15 + xorg-edgers + 3.11-rc5 Kernel: 3.11.0-rc5-vanillaice (compiled) libdrm-nouveau: 2.4.46+git20130702.c6d73cfe-0ubuntu0sarvatt~raring xserver-xorg-video-nouveau : 1:1.0.9+git20130730.300c5a32-0ubuntu0sarvatt~raring mesa: 9.2.0~git20130729+9.2.9b8ad643-0ubuntu0sarvatt~raring