[Webkit-unassigned] [Bug 103146] ARMv7 replaceWithJump ASSERT failure after r135330.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=103146





--- Comment #1 from Filip Pizlo <fpizlo at apple.com>  2012-11-23 15:23:20 PST ---
(In reply to comment #0)
> Running v8 test v7 with jsc in debug mode on our ARMv7 board I received this ASSERT failure:
> 
> Starting program: /data/kilvadyb/webkit-arm/webkit/WebKitBuild/Debug/bin/jsc run.js
> [Thread debugging using libthread_db enabled]
> [New Thread 0x42dc4400 (LWP 1111)]
> Richards: 161
> DeltaBlue: 21.8
> Crypto: 110
> RayTrace: 101
> ASSERTION FAILED: canBeJumpT4(instruction, target)
> /data/kilvadyb/webkit-arm/webkit/Source/JavaScriptCore/assembler/ARMv7Assembler.h(2475) : static void JSC::ARMv7Assembler::linkJumpT4(uint16_t*, void*)
> 
> Program received signal SIGSEGV, Segmentation fault.
> 0x4040b38c in JSC::ARMv7Assembler::linkJumpT4 (instruction=0x455695f6, target=0x43599dc0)
>     at /data/kilvadyb/webkit-arm/webkit/Source/JavaScriptCore/assembler/ARMv7Assembler.h:2475
> 2475            ASSERT(canBeJumpT4(instruction, target));
> (gdb)
> 
> I had similar problem on MIPS where a replaceWithJump would be easier to implement with direct jump instead of jump via register.

Actually, it looks like that assert is just wrong. I'll look more in a bit.

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