Hi Marco,
I seem to have missed this... On Jul 11 09:22, Marco Atzeri wrote: > trying to debug latest release candidate of netcdf > I hit this SIGSEGV before reaching main > > $ gdb .libs/ctest.exe > GNU gdb (GDB) Cygwin 7.9.1-1 > ..... > Reading symbols from .libs/ctest.exe...done. > (gdb) break main > Breakpoint 1 at 0x100401171: file > /pub/devel/netcdf/prova/netcdf-c-4.4.0-rc2/ncdump/ctest.c, line 32. > (gdb) run > Starting program: > /cygdrive/e/cyg_pub/devel/netcdf/prova/netcdf-c-4.4.0-rc2_build64/ncdump/.libs/ctest.exe > [New Thread 9476.0x2a88] > [New Thread 9476.0x1fa0] > [New Thread 9476.0x9a8] > > Program received signal SIGSEGV, Segmentation fault. > ___chkstk_ms () at > /usr/src/debug/gcc-4.9.3-1/libgcc/config/i386/cygwin.S:146 > 146 orq $0x0, (%rcx) /* probe there */ > > I thought it was a stack issue and I raised from 2M to 8M It *is* a stack issue of some sort, otherwise it wouldn't have called ___chkstk_ms, which is the guard page handler. Did you find out in the meantime? > SizeOfStackReserve 0000000000200000 > > SizeOfStackReserve 00000000007a1200 > > with no success. > > May be it is not a netcdf bug ? Ideas what to look for ? If it's prior to main, it must be some constructor. Other than that, no idea. > $ uname -svr > CYGWIN_NT-6.1 2.0.4(0.287/5/3) 2015-06-09 12:22 > > > In addition there is a problem with gcc-debuginfo > > $ cygcheck -l gcc-debuginfo |grep cygwin.S > /usr/src/debug/gcc-4.9.3-1/libgcc/config/i386/cygwin.S > > (gdb) break ___chkstk_ms > Breakpoint 2 at 0x100407a60: ___chkstk_ms. (5 locations) > (gdb) run > Starting program: > /cygdrive/e/cyg_pub/devel/netcdf/prova/netcdf-c-4.4.0-rc2_build64/ncdump/.libs/ctest.exe > [New Thread 6656.0x2980] > > Breakpoint 2, ___chkstk_ms () at ../../../libgcc/config/i386/cygwin.S:137 > 137 ../../../libgcc/config/i386/cygwin.S: No such file or directory. Hmm, the relative path might break finding the debuginfo. You should be able to help gdb by calling (gdb) dir /usr/src/debug/gcc-4.9.3-1/libgcc/config/i386 Corinna -- Corinna Vinschen Please, send mails regarding Cygwin to Cygwin Maintainer cygwin AT cygwin DOT com Red Hat
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