2014-06-02 11:25 GMT+02:00 Jim Michaels <[email protected]>:
> what I am seeing is the offset from the event viewer's crashdump info (the
> offset) doesn't match the code offset address in the .map file I generate
> using -xLinker -Map=whereis.map
>
> I wish I could have gcc generate code to catch these exceptions like
> "Access Viuolation 0xc0000005" and give some useful info like a line
> number, or generate some file that contains the proper offset address.
>
Well, if you run a version of the program compiled with "-g" or even "-g3"
(and NOT linked with "-s" or -Wl,-s"), and at the moment of the segfault
you type into the gdb console "bt", you will be able to see exactly what
function calls lead to the crash. So you do:
gcc -g blabla.c blabla2.c ... -o myprogram.exe
gdb myprogram
> run
[segfault or other signaling error]
> bt
If you're allergic to the commandline, you can try running your program
from within an IDE like Qt Creator, which can visually aid you to step
through the code.
That being said, if a compiler update is to blame, have you recompiled all
binaries that are used to create the program? There might be an
incompatibility lurking somewhere. This is just a guess though. A SSCCE
<http://sscce.org/> is needed to really diagnose your problem.
Ruben
> the event viewer shows P8: 0000000000019a8a (the offset)
> the offset in the .map file and in objdump output starts with 401000
> (hexadecimal)
>
> so I need to find a way of generating proper .map files for debugging. is
> there a switch I am missing?
>
> between compiler segfaults and this, things are not looking too well for
> my programs.
> Jim Michaels
>
> I am working on trying to find a way to boil down the compiler segfault
> into a bite-sized piece rather than sending the whole shebang. it might be
> hard be hard, nailing this one down is difficult, because it throws an
> error and segfaults on a perfectly good piece of code.
>
>
> --------------------------------------------
> On Mon, 6/2/14, Ruben Van Boxem <[email protected]> wrote:
>
> Subject: Re: [Mingw-w64-public] issue with .map file generation
> To: "[email protected]" <
> [email protected]>
> Date: Monday, June 2, 2014, 1:22 AM
>
> You
> cannot debug GCC generated programs with the Windows/Visual
> Studio tools. You must use GDB.
>
> Ruben
>
>
> 2014-06-02 9:46 GMT+02:00
> Jim Michaels <[email protected]>:
>
> I am
> unable to debug my programs, because the .map files and
> .objdump files that are generated don't match the offset
> given by werfault.exe which provides the minidump info form
> windows. I did not want to use gdb.
>
>
>
>
> -------------
>
> Jim Michaels
>
> [email protected]
>
> [email protected]
>
> http://RenewalComputerServices.com
>
> http://JesusnJim.com (my
> personal site, has software)
>
> ---
>
> IEC Units: Computer RAM & SSD measurements, microsoft
> disk size measurements (note: they will say GB or MB or KB
> or TB when it is IEC Units!):
>
> [KiB] [MiB] [GiB] [TiB]
>
> [2^10B=1,024^1B=1KiB]
>
> [2^20B=1,024^2B=1,048,576B=1MiB]
>
> [2^30B=1,024^3B=1,073,741,824B=1GiB]
>
> [2^40B=1,024^4B=1,099,511,627,776B=1TiB]
>
> [2^50B=1,024^5B=1,125,899,906,842,624B=1PiB]
>
> SI Units: Hard disk industry disk size measurements:
>
>
>
> [kB] [MB] [GB] [TB]
>
> [10^3B=1,000B=1kB]
>
> [10^6B=1,000,000B=1MB]
>
> [10^9B=1,000,000,000B=1GB]
>
> [10^12B=1,000,000,000,000B=1TB]
>
> [10^15B=1,000,000,000,000,000B=1PB]
>
>
>
>
>
>
>
>
>
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> by three acclaimed leaders in the field,
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applications. Written by three acclaimed leaders in the field,
this first edition is now available. Download your free book today!
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