[Webkit-unassigned] [Bug 222805] New: Crash with "invalid opcode" if the CPU does not support SSE4
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Fri Mar 5 08:52:14 PST 2021
https://bugs.webkit.org/show_bug.cgi?id=222805
Bug ID: 222805
Summary: Crash with "invalid opcode" if the CPU does not
support SSE4
Product: WebKit
Version: Other
Hardware: Unspecified
OS: Unspecified
Status: NEW
Severity: Normal
Priority: P2
Component: JavaScriptCore
Assignee: webkit-unassigned at lists.webkit.org
Reporter: berto at igalia.com
A user reported this crash with WebKitGTK 2.30.5 after opening www.avito.ru , selecting "Вход и регистрация" on the upper right corner and simply waiting for a few seconds.
(gdb) layout asm
>│0x7f00eb999254 <wasm_entry+56936> roundss $0x2,%xmm0,%xmm1 │
│0x7f00eb99925a <wasm_entry+56942> movsbq 0x1(%r13,%r8,1),%r9 │
│0x7f00eb999260 <wasm_entry+56948> movss %xmm1,0x0(%rbp,%r9,8) │
│0x7f00eb999267 <wasm_entry+56955> add $0x3,%r8 │
This is a 64-bit build but the CPU is an old Intel Core 2 without SSE4 instructions. Disabling the JIT ("JavaScriptCoreUseJIT=0") seems to solve the problem.
I assume that there is no plan to support such old hardware, but is this simply a WONTFIX or should WebKit disable the JIT conditionally in these cases?
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