ZeroPain with Ctrl_U and Netsurf

Hi,

I get a reproducable ZeroPain report if I do a Ctrl_U to clear the text in Netsurf’s URL Bar with BookMaker running.

I’m running RISCOS 5.25 14th Aug 18 and the latest Hard Disc image on a PandaBoard.

I have corresponded with Nick Roberts , who maintains BookMaker, and he also gets it when doing the same in the URL bar but that points to BDRand.

He has looked at my ZerioPain log and also his and thinks it may be to do with Hot Keys/Window Module.

Below is a snippit of the ZeroPain log and if required I can send the full log.

The events_prefilter + 480 seems a constant if that helps.

Doug

Time: Sun Sep 23 13:30:34 2018
Location: Offset 00007b88 in module Window
Current Wimp task: Bookmaker
Last app to start: <NewsHound$Dir>.!Runimage

R0 = 00000000 R1 = 00100000 R2 = ffffffff R3 = 20569d59
R4 = fa207e58 R5 = 4465d5d0 R6 = 0003db34 R7 = 0003da24
R8 = 00000000 R9 = 00000000 R10 = fa20021c R11 = fa207e30
R12 = fa207e34 R13 = fa207df0 R14 = fc406410 R15 = fc4065f8
DFAR = 000000c4 Mode SVC32 Flags nZCv if PSR = 60000113

fc4065b0 : 0a00000e : BEQ &FC4065F0
fc4065b4 : e3e00000 : MVN R0,#0
fc4065b8 : e5840000 : STR R0,[R4,#0]
fc4065bc : e59d1014 : LDR R1,[R13,#20]
fc4065c0 : e5861014 : STR R1,[R6,#20]
fc4065c4 : e59d2010 : LDR R2,[R13,#16]
fc4065c8 : e5862010 : STR R2,[R6,#16]
fc4065cc : e59d300c : LDR R3,[R13,#12]
fc4065d0 : e586300c : STR R3,[R6,#12]
fc4065d4 : e59d0008 : LDR R0,[R13,#8]
fc4065d8 : e5860008 : STR R0,[R6,#8]
fc4065dc : e59d1004 : LDR R1,[R13,#4]
fc4065e0 : e5861004 : STR R1,[R6,#4]
fc4065e4 : e59d2000 : LDR R2,[R13,#0]
fc4065e8 : e5862000 : STR R2,[R6,#0]
fc4065ec : ea00000f : B &FC406630
fc4065f0 * e59810c4 * LDR R1,[R8,#196]
fc4065f4 : e5861010 : STR R1,[R6,#16]
fc4065f8 : e5b73004 : LDR R3,[R7,#4]!
fc4065fc : e3530000 : CMP R3,#0
fc406600 : ba000006 : BLT &FC406620
fc406604 : e59800cc : LDR R0,[R8,#204]
fc406608 : e1530000 : CMP R3,R0
fc40660c : b5b810c8 : LDRLT R1,[R8,#200]!
fc406610 : b7910103 : LDRLT R0,[R1,R3,LSL #2]
fc406614 : b5b01020 : LDRLT R1,[R0,#32]!
fc406618 : b5a61014 : STRLT R1,[R6,#20]!
fc40661c : ba000001 : BLT &FC406628
fc406620 : e3e00000 : MVN R0,#0
fc406624 : e5a60014 : STR R0,[R6,#20]!
fc406628 : e3a00001 : MOV R0,#1
fc40662c : e5840000 : STR R0,[R4,#0]

R15 = fc4065f8 = Window +7b90 = events_postfilter +480
R14_svc = fc406410 = Window +79a8 = events_postfilter +298
Function call to fc405c1c = Window +71b4 = gadget_prefilter_state +18

I get a reproducable ZeroPain report if I do a Ctrl_U to clear the text in Netsurf’s URL Bar with BookMaker running.
The events_prefilter + 480 seems a constant if that helps.

From eyeballing Window’s event despatch I can imagine that if a toolbox app has a key pressed post filter, but the key press wasn’t from a toolbox app then that’d cause the pain you see – it’s trying to read w->id when w is NULL. Does this module help? Watch out for any other hotkey weirdness, I couldn’t decide where to make the change, F12 still seems to work though!

Hi Rob,

Does this module help?

Put the Module in !Boot.Choices.Boot.Predesk and rebooted and tried Ctrl_U in the Netsurf URL bar and no ZeroPain so I guess it’s fixed that one.

I’ll have a play around and see if anything else comes up over the next few days.

Thanks for yet more excellent service.

Doug