OpenEuphoria

1. Phix segfault

• Posted by Coderj Apr 18, 2018
• 1486 views

Hi Pete,

I've just downloaded and installed phix for 32 bit Linux (0.7.9). Everything installed fine and the tests were passed ok but when I tried to run a simple "hello world" program with a trace, I got this:

with trace 
trace(1) 
puts(1, "hello world\n") 
 
Result : 
 
SIGSEGV at #08190E71 
eax: 40000000 
ebx: 00000000 
ecx: 00000000 
edx: 000000E0 
esi: 09406BB0 
edi: 4201E50C 
 
pDiagN.e line 3300: symtab[224] bad S_NTyp[1] 
"sleep(5)..." 
pDiagN.e line 3041: oops, rtn[=8334] out of range[1..865] 
pDiagN.e line 3041: oops, rtn[=8427] out of range[1..865] 
/home/joe/phix/hello.exw:-1 (era=#08192AD7, from_addr=#0, ret_addr=#0) 
variable ???(varno=8138) has not been assigned a value 

It ran ok without the trace statements (and no, I didn't compile it in case you were wondering. I used the interpreter).

Thanks for all your hard work on Phix, it's awesome.

3. Re: Phix segfault

• Posted by petelomax Apr 18, 2018
• 1513 views

Ahem. Now let's not be shy here, Pete, deep breath...

trace has never worked on Linux, and, given my other commitments, getting it to work will require a concerted effort, over possibly quite some time.

Install Evan's debugger. Note that as I did that quite some time ago, I have version 0.9.18 - two later versions now exist but I remember that I could not get 0.9.20 to compile.

Run ./p -d p to create a list.asm for reference, then run edb --run ./p test

That led me to pTrace.e line 924: blankScreen = save_text_image({1,1},consoleSize).

First, see if you can do the same - search list.asm for the failure address shown in edb, and ask questions if/when you get stuck.

Then, realising the problem was that consoleSize was unassigned, I changed line 1436 in builtins\VM\pTrace.e from

        --DEV more... 
        screenLines = 25 
        blankScreen = {} 

to

        --DEV more... 
        screenLines = 25 
        screenCols = 80 
        blankScreen = {} 
        consoleSize = {screenLines,screenCols} 

then recompiled (./p -c p) and it got a wee bit further but crashed a little more cryptically (sorry).

With three (or more?) people trying similar small steps, we may (no promises) make slow and painful progress.

Leaving it to me all by my lonesome, the only thing I can guarantee is it will take much longer....

Pete

5. Re: Phix segfault

• Posted by begin Apr 27, 2018
• 1272 views

i tried it on win 10/64

pDiagN.e line 3041: oops, rtn[=9134] out of range[1..1234] 
H:\Euphoriaprog\Microexp\tester.ew:-1 (era=#007399B7, from_addr=#0, ret_addr=#0) 
subscript is not an atom 
 
Global & Local Variables 
 
--> see H:\Euphoriaprog\Microexp\ex.err 
Press Enter... 

ex.err

H:\Euphoriaprog\Microexp\tester.ew:-1 (era=#007399B7, from_addr=#0, ret_addr=#0) 
subscript is not an atom 
 
Global & Local Variables 

bummer, i would really like to have trace