On 4/20/10, leon zadorin <[email protected]> wrote:
> there is anyone out there who is using mingw64 to build native W7
> (pro) 64 bit simple (e.g. single-threaded) C++ applications which
> throw exceptions and have them unwind using dwarf2 (i.e.
> --disable-sjlj-exceptions)? Has it been done?
Minor update -- I have just verified (on 4.4.3) that using
slower/less-efficient (at least w.r.t. non-thrown exceptions)
prologue/epilogue exception handling (i.e. omitting the
--disable-sjlj-exceptions) fixes the issue -- the app catches the
exception.
I would like to know if there is any way to use dwarf2 eh though... my
understanding is that they are more efficient/faster for cases when
exceptions are not throw (which, by the very definition of an
exception, should occur the vast majority of times)...
kind regards
Leon.
> The C++ code which fails to catch is as follows:
>
> #include <iostream>
> #include <stdexcept>
>
> int
> main()
> {
> try {
> ::std::cout << "about to throw\n";
> throw ::std::runtime_error("boo");
> } catch (::std::exception const & e) {
> ::std::cout << "wam\n";
> } catch (...) {
> ::std::cout << "bam\n";
> }
>
> return 0;
> }
>
> the above is compiled as:
> c++ -static main.cc
>
> the gcc was configured as:
>
> Target: x86_64-w64-mingw32
> configure options:
> --disable-threads --enable-languages=c++ --disable-sjlj-exceptions
> --disable-libgomp --disable-nls --with-system-zlib --disable-libgcj
> --target=x86_64-w64-mingw32 --disable-multilib
>
> Thread model: single
> gcc version 4.4.3 (GCC) (but was also reproduced with 4.4.2)
>
> the collect/linking order is as follows:
> collect2 -Bstatic crt2.o crtbegin.o /var/tmp//ccDhsQqG.o -lstdc++
> -lmingw32 -lgcc_eh -lgcc -lmoldname -lmingwex -lmsvcrt -luser32
> -lkernel32 -ladvapi32 -lshell32 -lmingw32 -lgcc_eh -lgcc -lmoldname
> -lmingwex -lmsvcrt crtend.o
>
>
> The W7 reports that app has asked the runtime environment to terminate
> it in the unusual way (I presume it to be the usual thing it spits out
> when terminate/abort/etc is done by the app).
>
> Any thoughts would be appreciated.
>
> Kind regards
> Leon.
>
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