[Webkit-unassigned] [Bug 85076] ARM JIT causes segmentation fault on javascript-heavy pages

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=85076





--- Comment #8 from Zoltan Herczeg <zherczeg at webkit.org>  2012-04-30 14:20:41 PST ---
> Is that what you're looking for?

Yeah, if the constants are not changed. I mean pc+#33757136 can be different if you rerun the program.

0x49f0eaec:    ldr    r8, [pc, #33757136]    ; 0x49f0ed40

Anyway, this is clearly a rubish not a valid function:

   0x41d5d15c <_ZN3JSC4Heap9markRootsEb+1536>:    eor    r9, r9, r9, lsl #12
   0x41d5d160 <_ZN3JSC4Heap9markRootsEb+1540>:    eor    r9, r9, r9, lsr #7

This is clearly a fallbackpath:

   0x49f0eadc:    mov    r0, sp
   0x49f0eae0:    str    r4, [sp, #3118288]    ; 0x60
   0x49f0eae4:    ldr    r3, [pc, #33757136]    ; 0x49f0ed3c
   0x49f0eae8:    str    r4, [r3]
   0x49f0eaec:    ldr    r8, [pc, #33757136]    ; 0x49f0ed40
   0x49f0eaf0:    blx    r8
   0x49f0eaf4:    b    0x49f0b164

Question is, what pc+#33757136 should contain in the right case. Btw is webkitgtk-1.8.1 contains the latest trunk? I mean this might already been fixed...

Ah an idea! Instead of x/i write it as x/x and the x/x number again. I mean lets pc+#33757136 be 0x49f0ed40. Type x/x 0x49f0ed40 it will write you a number. x/x that number again, and tell me what it is.

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