[M3devel] more crashers

Mon Aug 17 06:01:45 CEST 2009

visobliq was stack overflow.
Raising the default from 4K to 16K didn't fix, but 32K did.

 - Jay

----------------------------------------
> From: jay.krell at cornell.edu
> To: hosking at cs.purdue.edu
> CC: m3devel at elegosoft.com
> Subject: RE: [M3devel] more crashers
> Date: Sun, 16 Aug 2009 20:32:31 +0000
>
>
> m3browser:
>
> It is specific to my config file m3-sys/cminstall/src/config-no-install/cm3.cfg that reachs back into the source tree. It won't happen with what most people do. I have to do that M3Predefines or such work so that all the uses of m3quake besides cm3 are much more like cm3.
>
>
> visobliq:
> not the same thing
> Does not occur on Linux/x86 or Linux/sparc.
> They do print
> Syntax error just before: -helvetica-bold-\*R-\*240-\*\") (LabelFo ...
> ill-formed character escape sequence
> Error detected (file file generated by Visual Obliq) (line 18, char 10)
> VideoVBT.Start Jv ServerFailure:errno=0
>
> but then gui comes up.
> I'll have to finish my Solaris reinstall and get dbx.
>
>
> - Jay
>
>
> ----------------------------------------
>> From: jay.krell at cornell.edu
>> To: hosking at cs.purdue.edu
>> Date: Sun, 16 Aug 2009 20:22:49 +0000
>> CC: m3devel at elegosoft.com
>> Subject: Re: [M3devel] more crashers
>>
>>
>> sorry, this is simple.
>>
>> derived_dirs := IntList.List1 (ID.Add (MxConfig.Get("BUILD_DIR")));
>>
>>
>> - Jay
>>
>>
>>
>> ----------------------------------------
>>> From: jay.krell at cornell.edu
>>> To: hosking at cs.purdue.edu
>>> Date: Sun, 16 Aug 2009 19:52:03 +0000
>>> CC: m3devel at elegosoft.com
>>> Subject: Re: [M3devel] more crashers
>>>
>>>
>>> Here is the relevant code in m3browser ID.m3:
>>>
>>>
>>> C:\dev2\cm3.2\m3-tools\m3markup\src\ID.m3(38): empty_id := Add ("");
>>>
>>> empty_id := Add ("");
>>>
>>> (*-------------------------------------------------------------- exported ---*)
>>> PROCEDURE Add (x: TEXT): T =
>>> VAR
>>> t: T;
>>> a: REF ARRAY OF CHAR;
>>> l: INTEGER;
>>> BEGIN
>>> l := Text.Length(x);
>>> ...
>>> END Add;
>>>
>>>
>>> The empty string constant ends up as null.
>>>
>>> .stabn 68,0,38,.LM115-.LFBB10
>>> .LM115:
>>> movl L_1 at GOT(%ebx), %eax
>>> leal 24(%eax), %eax
>>> movl %eax, (%esp)
>>> call ID__Add at PLT
>>> movl %eax, -8(%ebp)
>>> movl -8(%ebp), %ecx
>>> movl MM_ID at GOT(%ebx), %edx
>>> movl 248(%edx), %eax
>>> andl $0, %eax
>>> orl %ecx, %eax
>>> movl %eax, 248(%edx)
>>> .L136:
>>> movl MM_ID at GOT(%ebx), %eax
>>> .LBE16:
>>> addl $52, %esp
>>> popl %ebx
>>> popl %ebp
>>> ret
>>>
>>> L_1:
>>> 0 .long RTHooks__TextLitInfo
>>> 4 .long RTHooks__TextLitGetChar
>>> 8 .long RTHooks__TextLitGetWideChar
>>> 12 .long RTHooks__TextLitGetChars
>>> 16 .long RTHooks__TextLitGetWideChars
>>> 20 .long 2
>>> 24 .long L_1
>>> .long 0
>>> .zero 4
>>> .ascii "ID_M3"
>>> .zero 1
>>> .ascii "ExpandHashTable"
>>> .zero 1
>>> .ascii "ExpandIDs"
>>> .zero 1
>>> .ascii "ExpandChars"
>>> .zero 1
>>> .ascii "Compare"
>>> .zero 1
>>>
>>> If I change "" to "foo", I get:
>>>
>>> L_1:
>>> 0 .long RTHooks__TextLitInfo
>>> 4 .long RTHooks__TextLitGetChar
>>> 8 .long RTHooks__TextLitGetWideChar
>>> 12 .long RTHooks__TextLitGetChars
>>> 16 .long RTHooks__TextLitGetWideChars
>>> 20 .long 2
>>> 24 .long L_1
>>> .long 3
>>> .ascii "foo"
>>> .zero 1
>>> .ascii "ID_M3"
>>>
>>> and it still crashes.
>>>
>>>
>>> It seems to hit ID__Add twice when only once would be expected.
>>>
>>>
>>> - Jay
>>>
>>>
>>> ----------------------------------------
>>>> From: jay.krell at cornell.edu
>>>> To: hosking at cs.purdue.edu
>>>> Date: Sun, 16 Aug 2009 19:33:34 +0000
>>>> CC: m3devel at elegosoft.com
>>>> Subject: Re: [M3devel] more crashers
>>>>
>>>>
>>>> Could be. I've also seen it on PPC_DARWIN a while ago. I only recall seeing it on sparc and ppc.
>>>> It doesn't always occur.
>>>>
>>>>
>>>> Here is the m3browser crash on a system that can be debugged.
>>>> See why I want the full paths in the debug info?
>>>>
>>>>
>>>> C:\Users\jay\Desktop>\cygwin\bin\ssh xobsd.
>>>> $ cd /cm3
>>>> $ cd bin
>>>> $ export DISPLAY=192.168.1.120:0.0
>>>> $ gdb ./m3browser
>>>> GNU gdb 6.3
>>>> This GDB was configured as "i386-unknown-openbsd4.5"...
>>>> (gdb) r
>>>> Starting program: /home/jay/cm3/bin/m3browser
>>>> Program received signal SIGSEGV, Segmentation fault.
>>>> [Switching to process 31063, thread 0x7eafe800]
>>>> 0x01592fd4 in Text__Length (M3_Bd56fi_t=0x0) at ../src/text/Text.m3:16
>>>> 16 t.get_info (i);
>>>> (gdb) bt
>>>> #0 0x01592fd4 in Text__Length (M3_Bd56fi_t=0x0) at ../src/text/Text.m3:16
>>>> #1 0x09fd9464 in ID__Add (M3_Bd56fi_x=0x0) at ../src/ID.m3:48
>>>> #2 0x1c01e644 in Main_M3 (M3_AcxOUs_mode=1) at ../src/Main.m3:37
>>>> #3 0x0156f1bc in RTLinker__RunMainBody (M3_DjPxE3_m=0x3c003ec0)
>>>> at ../src/runtime/common/RTLinker.m3:399
>>>> #4 0x0156e576 in RTLinker__AddUnitI (M3_DjPxE3_m=0x3c003ec0)
>>>> at ../src/runtime/common/RTLinker.m3:113
>>>> #5 0x0156e604 in RTLinker__AddUnit (M3_DjPxE5_b=0x1c01e54d)
>>>> at ../src/runtime/common/RTLinker.m3:122
>>>> #6 0x1c004676 in main (argc=1, argv=0xcfbf6a3c, envp=0xcfbf6a44)
>>>> at _m3main.mc:4
>>>>
>>>>
>>>> - Jay
>>>>
>>>>
>>>> ________________________________
>>>>> From: hosking at cs.purdue.edu
>>>>> To: jay.krell at cornell.edu
>>>>> Date: Sun, 16 Aug 2009 15:26:49 -0400
>>>>> CC: m3devel at elegosoft.com
>>>>> Subject: Re: [M3devel] more crashers
>>>>>
>>>>> Could this be endianness-related?
>>>>>
>>>>> On 16 Aug 2009, at 15:21, Jay K wrote:
>>>>>
>>>>>
>>>>> I see the assertion failure on PPC_LINUX too.
>>>>> I tried VAR defaultStackSize := 1024 * 1024; (not sure why there was any suspicion of stack size).
>>>>>
>>>>>
>>>>> Debugging doesn't work PPC_LINUX.
>>>>>
>>>>>
>>>>> jay at plin:/cm3/bin$ gdb ./cm3
>>>>> GNU gdb 6.8-debian
>>>>> Copyright (C) 2008 Free Software Foundation, Inc.
>>>>> License GPLv3+: GNU GPL version 3 or later
>>>>> This is free software: you are free to change and redistribute it.
>>>>> There is NO WARRANTY, to the extent permitted by law. Type "show copying"
>>>>> and "show warranty" for details.
>>>>> This GDB was configured as "powerpc-linux-gnu"...
>>>>> break ma(gdb) break main
>>>>> Breakpoint 1 at 0x86fc4: file _m3main.mc, line 2.
>>>>> (gdb) r
>>>>> Starting program: /home/jay/cm3/bin/cm3
>>>>> Warning:
>>>>> Cannot insert breakpoint 1.
>>>>> Error accessing memory address 0x86fc4: Input/output error.
>>>>>
>>>>>
>>>>> No problem with C:
>>>>>
>>>>>
>>>>> jay at plin:/cm3/bin$ echo "main(){}"> 1.c
>>>>> jay at plin:/cm3/bin$ gcc -g 1.c
>>>>> jay at plin:/cm3/bin$ gdb ./a.out
>>>>> GNU gdb 6.8-debian
>>>>> Copyright (C) 2008 Free Software Foundation, Inc.
>>>>> License GPLv3+: GNU GPL version 3 or later
>>>>> This is free software: you are free to change and redistribute it.
>>>>> There is NO WARRANTY, to the extent permitted by law. Type "show copying"
>>>>> and "show warranty" for details.
>>>>> This GDB was configured as "powerpc-linux-gnu"...
>>>>> (gdb) break main
>>>>> Breakpoint 1 at 0x10000448: file 1.c, line 1.
>>>>> (gdb) r
>>>>> Starting program: /home/jay/cm3/bin/a.out
>>>>> Breakpoint 1, main () at 1.c:1
>>>>> 1 main(){}
>>>>> (gdb)
>>>>>
>>>>>
>>>>> jay at plin:/cm3/bin$ gcc -gstabs+ 1.c
>>>>> jay at plin:/cm3/bin$ gdb ./a.out
>>>>> GNU gdb 6.8-debian
>>>>> Copyright (C) 2008 Free Software Foundation, Inc.
>>>>> License GPLv3+: GNU GPL version 3 or later
>>>>> This is free software: you are free to change and redistribute it.
>>>>> There is NO WARRANTY, to the extent permitted by law. Type "show copying"
>>>>> and "show warranty" for details.
>>>>> This GDB was configured as "powerpc-linux-gnu"...
>>>>> (gdb) break main
>>>>> Breakpoint 1 at 0x10000448: file 1.c, line 1.
>>>>> (gdb) r
>>>>> Starting program: /home/jay/cm3/bin/a.out
>>>>> Breakpoint 1, main () at 1.c:1
>>>>> 1 main(){}
>>>>>
>>>>>
>>>>> jay at plin:/cm3/bin$ gcc -gstabs 1.c
>>>>> jay at plin:/cm3/bin$ gdb ./a.out
>>>>> GNU gdb 6.8-debian
>>>>> Copyright (C) 2008 Free Software Foundation, Inc.
>>>>> License GPLv3+: GNU GPL version 3 or later
>>>>> This is free software: you are free to change and redistribute it.
>>>>> There is NO WARRANTY, to the extent permitted by law. Type "show copying"
>>>>> and "show warranty" for details.
>>>>> This GDB was configured as "powerpc-linux-gnu"...
>>>>> (gdb) break main
>>>>> Breakpoint 1 at 0x10000448: file 1.c, line 1.
>>>>> (gdb) r
>>>>> Starting program: /home/jay/cm3/bin/a.out
>>>>> Breakpoint 1, main () at 1.c:1
>>>>> 1 main(){}
>>>>> (gdb)
>>>>>
>>>>>
>>>>> - Jay
>>>>>
>>>>>
>>>>> ----------------------------------------
>>>>> From: jay.krell at cornell.edu
>>>>> To: m3devel at elegosoft.com
>>>>> Subject: more crashers
>>>>> Date: Sun, 16 Aug 2009 10:06:15 +0000
>>>>>
>>>>>
>>>>> This is head on SOLgnu:
>>>>> I'll try another and debug and see if fix is easy.
>>>>>
>>>>> -bash-3.00$ ./m3browser
>>>>>
>>>>> ***
>>>>> *** runtime error:
>>>>> *** Segmentation violation - possible attempt to dereference NIL
>>>>> *** pc = 0xfe484f04 = String16_M3 + 0xe0 in ../src/text/String16.m3
>>>>> ***
>>>>>
>>>>> -bash-3.00$ ./visobliq
>>>>> Internal Obliq interpreter installed...
>>>>> Establishing 'templates'
>>>>> (Created frame 'templates')
>>>>> let
>>>>> Templates =
>>>>> {boolean=> ... ,
>>>>> browser=> ... ,
>>>>> button=> ... ,
>>>>> choice=> ... ,
>>>>> filebrowser=> ... ,
>>>>> form=> ... ,
>>>>> frame=> ... ,
>>>>> hscroll=> ... ,
>>>>> menu=> ... ,
>>>>> numeric=> ... ,
>>>>> text=> ... ,
>>>>> textedit=> ... ,
>>>>> typein=> ... ,
>>>>> video=> ... ,
>>>>> vscroll=> ... }
>>>>> Establishing 'vowidgets'
>>>>> (Created frame 'vowidgets')
>>>>> ok
>>>>> Establishing 'vocheckpt'
>>>>> (Created frame 'vocheckpt')
>>>>> ok
>>>>> Establishing 'volib'
>>>>> (Created frame 'volib')
>>>>> Segmentation Fault (core dumped)
>>>>> -bash-3.00$
>>>>>
>>>>>