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in reply to Re^4: Module::Install hacking
in thread Module::Install hacking

(details of which are not posted in this thread)

Not many details to report - it was just one of those "perl.exe has stopped working" type of messages as the program (ie any program that had loaded Gtk2-WebKit) was exiting.
I don't know the exact details of what was going wrong, but both libgcc_sis_452.dll and libgcc_s_dw2-1.dll (which were identical) had been loaded by different parts of the program. Restructuring so that libgcc_sis_452.dll was used throughout fixed the problem.

My guess is that, during exit of "the program", a handle was being thrown to the wrong dll.

NOTE: The 2 dlls were not actually identical, but were close enough to identical. I did replace libgcc_s_dw2-1.dll with a copy that *was* identical to libgcc_sis_452.dll and it made no difference.

Cheers,
Rob

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Re^6: Module::Install hacking
by BrowserUk (Patriarch) on Sep 15, 2012 at 04:44 UTC
    Not many details to report

    The guts of the problem was an unhandled exception during the cleanup of g++ exception stack frames. Beyond that I did not have the appropriate MinGW symbol files to trace into.

    With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
    Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
    "Science is about questioning the status quo. Questioning authority".
    In the absence of evidence, opinion is indistinguishable from prejudice.

    RIP Neil Armstrong
[reply]
      So ABI breakage and DLL hell between different builds of Mingw/GCC. Well what else could it be after looking at libgcc dll's export table other than GCC exception handling? div by zero or x87 FP exception? :-) I really really wish Mingw would has MS compatible SEH. Writing Win32 compiler-portable Perl XS/C code around bad C code beyond my control using IsBadReadPtr/IsBadWritePtr is cumbersome and those 2 will never catch STATUS_ILLEGAL_INSTRUCTION for example.
[reply]
        MS compatible SEH.

        I agree. I did come up with a "compatibility layer" -- nothing fancy just a couple of #defines -- that allowed me to use SEH in my unauthorised version of Devel::Size and compile it with MSVC & Mingw 32 & 64-bit without change.

        However, in the subsequent authorised version, they re-wrote all the exception handling claiming that it didn't work on gcc. No details given, so I can't talk to that.

        I do know that syphilis compiled it successfully with MinGW and it appeared to work okay. Admittedly, I didn't try to do anything complicated with the exceptions; just basically ignored them.

        With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
        Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
        "Science is about questioning the status quo. Questioning authority".
        In the absence of evidence, opinion is indistinguishable from prejudice.

        RIP Neil Armstrong
[reply]

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