[Webkit-unassigned] [Bug 224134] New: Webkit constantly scrashes on RISC-V 64

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Fri Apr 2 15:27:23 PDT 2021 

https://bugs.webkit.org/show_bug.cgi?id=224134

            Bug ID: 224134
           Summary: Webkit constantly scrashes on RISC-V 64
           Product: WebKit
           Version: Other
          Hardware: Unspecified
                OS: Linux
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: New Bugs
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: lakotamm at gmail.com

I am testing Epiphany on emulated riscv64 and I am experiencing pretty much constant crashes when browsing. The crash often occurs when the website is already displayed and almost done loading. It is repeatedly consistent on a website, however it is not consistent across different websites.

OS: Debian GNU/Linux bullseye/sid riscv64 
Host: riscv-virtio,qemu
Kernel: 5.10.0-5-riscv64
CPU: (8)
Memory: 175MiB / 3941MiB

Tested Epiphany versions:
- 3.38.2-1 (Debian unstable)
- 40.0-2 (Debian experimental branch)
- 40.0 (Compiled from source, Master, commit f094cd170fa4f23ec6a8c756cfbc2b2ca042cd55)

Tested WebKitGTK versions:
webkit2gtk-driver 2.32.0-1 and 2.30.6-1
libwebkit2gtk-4.0-dev 2.32.0-1 and 2.30.6-1
libwebkit2gtk-4.0-37 2.32.0-1 and 2.30.6-1

Behavior is the same in all tested versions.

Crash logs:

Both websites were visited 3 times in a row.

Tested webpage: [https://www.gnome.org/](https://www.gnome.org/)
The content was displayed before crash.

miroslav at debian:~/epiphany/build$ epiphany
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
WARNING: This target JIT is not designed for the host you are running.  If bad things happen, please choose a different -march switch.
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
LLVM ERROR: Cannot select: 0x3fa14eb138: ch = store<(store 4 into %ir.mask_ptr1 + 12, align 16), trunc to i32> 0x3fa14eef70, 0x3fa14f2ba0, 0x3fa14b9118, undef:i64
  0x3fa14f2ba0: i64 = sub Constant:i64<0>, 0x3fa14eadf8
    0x3fa14bb128: i64 = Constant<0>
    0x3fa14eadf8: i64 = and 0x3fa14eb068, Constant:i64<1>
      0x3fa14eb068: i64 = srl 0x3fa14ed5d0, Constant:i64<7>
        0x3fa14ed5d0: i64,ch = load<(load 2 from %fixed-stack.5, align 8), zext from i16> 0x3fa0095b68, FrameIndex:i64<-2>, undef:i64
          0x3fa14b8c38: i64 = FrameIndex<-2>
          0x3fa14b8b68: i64 = undef
        0x3fa14eb000: i64 = Constant<7>
      0x3fa14bb1f8: i64 = Constant<1>
  0x3fa14b9118: i64 = add FrameIndex:i64<6>, Constant:i64<28>
    0x3fa14b92b8: i64 = FrameIndex<6>
    0x3fa151b5e0: i64 = Constant<28>
  0x3fa14b8b68: i64 = undef
In function: fs_variant_partial

(epiphany:10582): epiphany-WARNING **: 21:36:50.038: Web process crashed
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
WARNING: This target JIT is not designed for the host you are running.  If bad things happen, please choose a different -march switch.
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
LLVM ERROR: Cannot select: 0x3f8d4ea948: ch = store<(store 4 into %ir.mask_ptr1 + 12, align 16), trunc to i32> 0x3f8d4ee780, 0x3f8d4f23b0, 0x3f8d4b8928, undef:i64
  0x3f8d4f23b0: i64 = sub Constant:i64<0>, 0x3f8d4ea608
    0x3f8d4ba938: i64 = Constant<0>
    0x3f8d4ea608: i64 = and 0x3f8d4ea878, Constant:i64<1>
      0x3f8d4ea878: i64 = srl 0x3f8d4ecde0, Constant:i64<7>
        0x3f8d4ecde0: i64,ch = load<(load 2 from %fixed-stack.5, align 8), zext from i16> 0x3f8c051a68, FrameIndex:i64<-2>, undef:i64
          0x3f8d4b8448: i64 = FrameIndex<-2>
          0x3f8d4b8378: i64 = undef
        0x3f8d4ea810: i64 = Constant<7>
      0x3f8d4baa08: i64 = Constant<1>
  0x3f8d4b8928: i64 = add FrameIndex:i64<6>, Constant:i64<28>
    0x3f8d4b8ac8: i64 = FrameIndex<6>
    0x3f8d51adf0: i64 = Constant<28>
  0x3f8d4b8378: i64 = undef
In function: fs_variant_partial

(epiphany:10582): epiphany-WARNING **: 21:37:47.169: Web process crashed
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
WARNING: This target JIT is not designed for the host you are running.  If bad things happen, please choose a different -march switch.
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
LLVM ERROR: Cannot select: 0x3f954edce8: ch = store<(store 4 into %ir.mask_ptr1 + 12, align 16), trunc to i32> 0x3f954f1b20, 0x3f954f5750, 0x3f954bccd8, undef:i64
  0x3f954f5750: i64 = sub Constant:i64<0>, 0x3f954ed9a8
    0x3f954bece8: i64 = Constant<0>
    0x3f954ed9a8: i64 = and 0x3f954edc18, Constant:i64<1>
      0x3f954edc18: i64 = srl 0x3f954f0180, Constant:i64<7>
        0x3f954f0180: i64,ch = load<(load 2 from %fixed-stack.5, align 8), zext from i16> 0x3f940544f8, FrameIndex:i64<-2>, undef:i64
          0x3f954bc7f8: i64 = FrameIndex<-2>
          0x3f954bc728: i64 = undef
        0x3f954edbb0: i64 = Constant<7>
      0x3f954bedb8: i64 = Constant<1>
  0x3f954bccd8: i64 = add FrameIndex:i64<6>, Constant:i64<28>
    0x3f954bce78: i64 = FrameIndex<6>
    0x3f9551e190: i64 = Constant<28>
  0x3f954bc728: i64 = undef
In function: fs_variant_partial

(epiphany:10582): epiphany-WARNING **: 21:38:15.356: Web process crashed


Tested webpage: [https://www.google.com/?gws_rd=ssl](https://www.google.com/?gws_rd=ssl)
The content was NOT displayed before crash.

miroslav at debian:~/epiphany$ epiphany
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
WARNING: This target JIT is not designed for the host you are running.  If bad things happen, please choose a different -march switch.
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
LLVM ERROR: Cannot select: 0x3f8d1741d8: ch = store<(store 4 into %ir.mask_ptr1 + 12, align 16), trunc to i32> 0x3f8d178010, 0x3f8d17bc40, 0x3f8d1421b8, undef:i64
  0x3f8d17bc40: i64 = sub Constant:i64<0>, 0x3f8d173e98
    0x3f8d1441c8: i64 = Constant<0>
    0x3f8d173e98: i64 = and 0x3f8d174108, Constant:i64<1>
      0x3f8d174108: i64 = srl 0x3f8d176670, Constant:i64<7>
        0x3f8d176670: i64,ch = load<(load 2 from %fixed-stack.5, align 8), zext from i16> 0x3f8c094c58, FrameIndex:i64<-2>, undef:i64
          0x3f8d141cd8: i64 = FrameIndex<-2>
          0x3f8d141c08: i64 = undef
        0x3f8d1740a0: i64 = Constant<7>
      0x3f8d144298: i64 = Constant<1>
  0x3f8d1421b8: i64 = add FrameIndex:i64<6>, Constant:i64<28>
    0x3f8d142358: i64 = FrameIndex<6>
    0x3f8d1a4680: i64 = Constant<28>
  0x3f8d141c08: i64 = undef
In function: fs_variant_partial

(epiphany:12033): epiphany-WARNING **: 22:02:07.812: Web process crashed
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
WARNING: This target JIT is not designed for the host you are running.  If bad things happen, please choose a different -march switch.
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
LLVM ERROR: Cannot select: 0x3fad173908: ch = store<(store 4 into %ir.mask_ptr1 + 12, align 16), trunc to i32> 0x3fad177740, 0x3fad17b370, 0x3fad1418e8, undef:i64
  0x3fad17b370: i64 = sub Constant:i64<0>, 0x3fad1735c8
    0x3fad1438f8: i64 = Constant<0>
    0x3fad1735c8: i64 = and 0x3fad173838, Constant:i64<1>
      0x3fad173838: i64 = srl 0x3fad175da0, Constant:i64<7>
        0x3fad175da0: i64,ch = load<(load 2 from %fixed-stack.5, align 8), zext from i16> 0x3fac051438, FrameIndex:i64<-2>, undef:i64
          0x3fad141408: i64 = FrameIndex<-2>
          0x3fad141338: i64 = undef
        0x3fad1737d0: i64 = Constant<7>
      0x3fad1439c8: i64 = Constant<1>
  0x3fad1418e8: i64 = add FrameIndex:i64<6>, Constant:i64<28>
    0x3fad141a88: i64 = FrameIndex<6>
    0x3fad1a3db0: i64 = Constant<28>
  0x3fad141338: i64 = undef
In function: fs_variant_partial

(epiphany:12033): epiphany-WARNING **: 22:03:51.988: Web process crashed
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
WARNING: This target JIT is not designed for the host you are running.  If bad things happen, please choose a different -march switch.
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
LLVM ERROR: Cannot select: 0x3fc11789e8: ch = store<(store 4 into %ir.mask_ptr1 + 12, align 16), trunc to i32> 0x3fc117c820, 0x3fc1180450, 0x3fc11469c8, undef:i64
  0x3fc1180450: i64 = sub Constant:i64<0>, 0x3fc11786a8
    0x3fc11489d8: i64 = Constant<0>
    0x3fc11786a8: i64 = and 0x3fc1178918, Constant:i64<1>
      0x3fc1178918: i64 = srl 0x3fc117ae80, Constant:i64<7>
        0x3fc117ae80: i64,ch = load<(load 2 from %fixed-stack.5, align 8), zext from i16> 0x3fc0054838, FrameIndex:i64<-2>, undef:i64
          0x3fc11464e8: i64 = FrameIndex<-2>
          0x3fc1146418: i64 = undef
        0x3fc11788b0: i64 = Constant<7>
      0x3fc1148aa8: i64 = Constant<1>
  0x3fc11469c8: i64 = add FrameIndex:i64<6>, Constant:i64<28>
    0x3fc1146b68: i64 = FrameIndex<6>
    0x3fc11a8e90: i64 = Constant<28>
  0x3fc1146418: i64 = undef
In function: fs_variant_partial

(epiphany:12033): epiphany-WARNING **: 22:04:14.434: Web process crashed
miroslav at debian:~/epiphany$ epiphany
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
WARNING: This target JIT is not designed for the host you are running.  If bad things happen, please choose a different -march switch.
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
'generic' is not a recognized processor for this target (ignoring processor)
LLVM ERROR: Cannot select: 0x3f91176b38: ch = store<(store 4 into %ir.mask_ptr1 + 12, align 16), trunc to i32> 0x3f9117a970, 0x3f9117e5a0, 0x3f91144b18, undef:i64
  0x3f9117e5a0: i64 = sub Constant:i64<0>, 0x3f911767f8
    0x3f91146b28: i64 = Constant<0>
    0x3f911767f8: i64 = and 0x3f91176a68, Constant:i64<1>
      0x3f91176a68: i64 = srl 0x3f91178fd0, Constant:i64<7>
        0x3f91178fd0: i64,ch = load<(load 2 from %fixed-stack.5, align 8), zext from i16> 0x3f90054978, FrameIndex:i64<-2>, undef:i64
          0x3f91144638: i64 = FrameIndex<-2>
          0x3f91144568: i64 = undef
        0x3f91176a00: i64 = Constant<7>
      0x3f91146bf8: i64 = Constant<1>
  0x3f91144b18: i64 = add FrameIndex:i64<6>, Constant:i64<28>
    0x3f91144cb8: i64 = FrameIndex<6>
    0x3f911a6fe0: i64 = Constant<28>
  0x3f91144568: i64 = undef
In function: fs_variant_partial

(epiphany:12256): epiphany-WARNING **: 22:13:32.178: Web process crashed

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