On 10/29/2019 10:53 AM, Ken Brown wrote: > On 10/26/2019 11:07 AM, Roumen Petrov wrote: >> >> After additional tests (research) I was able to isolate issues to simple test >> case. Please find attached "test-dlclose.c" and "Makefile". >> First test is as is: >> >> $ make >> cc -g -Wall -Wextra test-dlclose.c -o test-dlclose >> ./test-dlclose >> exit with code 33 >> make: [Makefile:4: all] Error 33 (ignored) >> >> For next test change test-dlclose.c to define DLCLOSE_ATEXIT ( s/#if 0/#if >> 1/ ): >> $ make >> cc -g -Wall -Wextra test-dlclose.c -o test-dlclose >> ./test-dlclose >> exit with code 33 > > I ran this second version of test-dlclose (with DLCLOSE_ATEXIT defined) under > strace and got the following: > > $ strace -o trace.out ./test-dlclose.exe > exit with code 33 > Segmentation fault > > The strace output ends with > > 30 30143 [main] test-dlclose 847 write: 18 = write(1, 0x600061E20, 18) > --- Process 33456 (pid: 847) unloaded DLL at 00000003e7930000 > --- Process 33456 (pid: 847), exception c0000005 at 00000003e7931080 > --- Process 33456 (pid: 847) thread 26088 exited with status 0xc0000005 > --- Process 33456 (pid: 847) thread 33544 exited with status 0xc0000005 > --- Process 33456 (pid: 847) thread 36020 exited with status 0xc0000005 > --- Process 33456 exited with status 0xc0000005 > > The address 00000003e7930000 seems to be in /usr/bin/cygz.dll, which is the > DLL
Sorry, I meant to say 00000003e7931080; 00000003e7930000 is the start of cygz.dll. > that got unloaded. After installing zlib-debuginfo, I ran addr2line to see > where the crash occurred, and this too crashed: > > $ addr2line -C -f -i -p -e /usr/bin/cygz.dll 0x3e7931080 > Segmentation fault (core dumped) > > That's as far as I've gotten. > > Ken > > -- > Problem reports: http://cygwin.com/problems.html > FAQ: http://cygwin.com/faq/ > Documentation: http://cygwin.com/docs.html > Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple > -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
