Hi Bram, On Sat, Nov 21, 2020 at 6:57 AM Bram Moolenaar <[email protected]> wrote:
> > Yegappan wrote: > > > When I run the test_vim9_expr.vim test on MacOS with Vim 8.2.2029), > > I see that VIm crashes with a bad instruction exception. > > > > * thread #1, queue = 'com.apple.main-thread', stop reason = > > EXC_BAD_INSTRUCTION (code=EXC_I386_INVOP, subcode=0x0) > > > > I see this crash only when building Vim with debug symbols (-g -O0). > > If I build Vim without the debug symbols, I don't see this problem. > > I also don't see this crash with the ASAN and UBSAN builds. > > > > Is this a bug in the compiler? I am using the following Clang compiler on > > Catalina: > > > > Apple clang version 12.0.0 (clang-1200.0.32.21) > > Target: x86_64-apple-darwin19.6.0 > > > > The complete traceback is below: > > > > * thread #1, queue = 'com.apple.main-thread', stop reason = > > EXC_BAD_INSTRUCTION (code=EXC_I386_INVOP, subcode=0x0) > > * frame #0: 0x00007fff6af56fca > > libsystem_c.dylib`__chk_fail_overflow.cold.1 + 16 > > frame #1: 0x00007fff6af54214 libsystem_c.dylib`__chk_fail_overflow + > 9 > > frame #2: 0x00007fff6af543f0 libsystem_c.dylib`__strcpy_chk + 83 > > frame #3: 0x000000010029287b > > vim`add_vim9_script_var(di=0x0000000100606550, tv=0x00007ffeefbf9178, > > type=0x0000000000000000) at vim9script.c:604:2 > > This is: > > STRCPY(&newsav->sav_key, di->di_key); > > And "sav_key" is a one byte array, that is actually longer. This looks > like the FORTIFY_SOURCE problem. Configure only adds this for GCC 4 and > higher, perhaps we also need it for clang? > > You could try adding this to the clang command: > -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=1 > > With FORTIFY_SOURCE, I am not able to reproduce the problem. Regards, Yegappan -- -- You received this message from the "vim_dev" maillist. Do not top-post! Type your reply below the text you are replying to. For more information, visit http://www.vim.org/maillist.php --- You received this message because you are subscribed to the Google Groups "vim_dev" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/vim_dev/CAAW7x7%3DxdSnhOFcmUAHUR-ydntjs8FTYmicr2w9oZqcphQuxrA%40mail.gmail.com.
