1740793 - Crash comparing vendor string returned by fQueryString(mDisplay, LOCAL_EGL_VENDOR)

Status: RESOLVED DUPLICATE of bug 1743403

(Core :: Graphics: CanvasWebGL, defect)

Description

[Randell Jesup [:jesup] (needinfo me)]

Attachment: egl_crash

I've hit this twice now in local builds; I suspect 'vendor' is a nullptr, but gdb says it's "optimized out" (likely in a register). We crash calling strcmp(vendor, "ARM").

I'll attach a gdb log poking around

Comment 1

[Randell Jesup [:jesup] (needinfo me)]

FYI, I've been hitting this a LOT at startup (not 100%, but a lot) in debug builds. I'm running Fedora 34. I have a stack of other patches I'm testing, but nothing should have touched gfx/gl, though they may have shifted some timing

Comment 2

[Darkspirit]

Do you have the proprietary Nvidia driver installed, but are not using it? (libglvnd has a bug: bug 1737078)
Do you have multiple graphics cards?
Are you using Wayland, Xwayland or X11?

Comment 3

[Randell Jesup [:jesup] (needinfo me)]

(In reply to Darkspirit from comment #2)

Do you have the proprietary Nvidia driver installed, but are not using it? (libglvnd has a bug: bug 1737078)

I do have proprietary nvidia installed, but I think I'm using it:

Section "Device"
Identifier "Device0"
Driver "nvidia"
VendorName "NVIDIA Corporation"
EndSection

and

[1456177.595] Kernel command line: BOOT_IMAGE=(hd1,gpt5)/vmlinuz-5.13.19-200.fc34.x86_64 root=/dev/mapper/fedora-root ro resume=/dev/mapper/fedora-swap rd.lvm.lv=fedora/root rd.luks.uuid=luks-b88bdd14-6296-49bc-af80-02825b01d8bd rd.lvm.lv=fedora/swap quiet rd.driver.blacklist=nouveau
[1456177.614] (II) Loading /usr/lib64/xorg/modules/drivers/nvidia_drv.so
[1456177.651] (II) NVIDIA(0): ACPI event daemon is available, the NVIDIA X driver will
[1456179.225] (II) NVIDIA(0): [DRI2] VDPAU driver: nvidia

Do you have multiple graphics cards?

No

Are you using Wayland, Xwayland or X11?

X11

FYI, local DEBUG build

Comment 4

[BugBot [:suhaib / :marco/ :calixte]]

The severity field is not set for this bug.
:jgilbert, could you have a look please?

For more information, please visit auto_nag documentation.

Comment 5

[Randell Jesup [:jesup] (needinfo me)]

I'm continuing to hit this in local debug builds, maybe one in 4 runs

Comment 6

[Darkspirit]

https://hg.mozilla.org/mozilla-central/rev/64da1a6eb723 should have fixed this a week ago. Where is it crashing now?

Comment 7

[Randell Jesup [:jesup] (needinfo me)]

Aha. I hadn't repulled central since then. I'll close this as a dup then