search for: dyld_stub___cxa_throw

I debugged this a bit and it seems the mach_override patching of __cxa_throw is bogus. The start of that function is patched to jump to garbage. Breakpoint 1, 0x0000000100001c19 in main () (gdb) display/i $pc 2: x/i $pc 0x100001c19 <main+318>: callq 0x100016386 <dyld_stub___cxa_throw> (gdb) si 0x0000000100016386 in dyld_stub___cxa_throw () 2: x/i $pc 0x100016386 <dyld_stub___cxa_throw>: jmpq *0xae1c(%rip) # 0x1000211a8 (gdb) 0x0000000102244870 in __cxa_throw () 2: x/i $pc 0x102244870 <__cxa_throw>: jmpq 0xffd27000 (gdb) # the above its __cxa_throw...

...I debugged this a bit and it seems the mach_override patching of __cxa_throw is bogus. The start of that function is patched to jump to garbage. > > Breakpoint 1, 0x0000000100001c19 in main () > (gdb) display/i $pc > 2: x/i $pc 0x100001c19 <main+318>: callq 0x100016386 <dyld_stub___cxa_throw> > (gdb) si > 0x0000000100016386 in dyld_stub___cxa_throw () > 2: x/i $pc 0x100016386 <dyld_stub___cxa_throw>: jmpq *0xae1c(%rip) # 0x1000211a8 > (gdb) > 0x0000000102244870 in __cxa_throw () > 2: x/i $pc 0x102244870 <__cxa_throw>: jmpq 0xffd2700...

...the mach_override patching of > __cxa_throw is bogus. The start of that function is patched to jump to > garbage. > > > > Breakpoint 1, 0x0000000100001c19 in main () > > (gdb) display/i $pc > > 2: x/i $pc 0x100001c19 <main+318>: callq 0x100016386 > <dyld_stub___cxa_throw> > > (gdb) si > > 0x0000000100016386 in dyld_stub___cxa_throw () > > 2: x/i $pc 0x100016386 <dyld_stub___cxa_throw>: jmpq > *0xae1c(%rip) # 0x1000211a8 > > (gdb) > > 0x0000000102244870 in __cxa_throw () > > 2: x/i $pc 0x102244870 <_...

...> __cxa_throw is bogus. The start of that function is patched to jump to > > garbage. > > > > > > Breakpoint 1, 0x0000000100001c19 in main () > > > (gdb) display/i $pc > > > 2: x/i $pc 0x100001c19 <main+318>: callq 0x100016386 > > <dyld_stub___cxa_throw> > > > (gdb) si > > > 0x0000000100016386 in dyld_stub___cxa_throw () > > > 2: x/i $pc 0x100016386 <dyld_stub___cxa_throw>: jmpq > > *0xae1c(%rip) # 0x1000211a8 > > > (gdb) > > > 0x0000000102244870 in __cxa_throw () > >...

Jack, can you please upload this test somewhere? On Thu, Nov 29, 2012 at 10:09 AM, Kostya Serebryany <kcc at google.com> wrote: > +glider > The compiler hardly matters here, I would expect the same failures with > clang. > Alex, could you please take a look? > > --kcc > > > On Thu, Nov 29, 2012 at 9:55 PM, Jack Howarth <howarth at bromo.med.uc.edu> >

...> __cxa_throw is bogus. The start of that function is patched to jump to > > garbage. > > > > > > Breakpoint 1, 0x0000000100001c19 in main () > > > (gdb) display/i $pc > > > 2: x/i $pc 0x100001c19 <main+318>: callq 0x100016386 > > <dyld_stub___cxa_throw> > > > (gdb) si > > > 0x0000000100016386 in dyld_stub___cxa_throw () > > > 2: x/i $pc 0x100016386 <dyld_stub___cxa_throw>: jmpq > > *0xae1c(%rip) # 0x1000211a8 > > > (gdb) > > > 0x0000000102244870 in __cxa_throw () > >...

...he start of that function is patched to jump to > > > garbage. > > > > > > > > Breakpoint 1, 0x0000000100001c19 in main () > > > > (gdb) display/i $pc > > > > 2: x/i $pc 0x100001c19 <main+318>: callq 0x100016386 > > > <dyld_stub___cxa_throw> > > > > (gdb) si > > > > 0x0000000100016386 in dyld_stub___cxa_throw () > > > > 2: x/i $pc 0x100016386 <dyld_stub___cxa_throw>: jmpq > > > *0xae1c(%rip) # 0x1000211a8 > > > > (gdb) > > > > 0x00000001022448...

...us. The start of that function is patched to jump to >> > garbage. >> > > >> > > Breakpoint 1, 0x0000000100001c19 in main () >> > > (gdb) display/i $pc >> > > 2: x/i $pc 0x100001c19 <main+318>: callq 0x100016386 >> > <dyld_stub___cxa_throw> >> > > (gdb) si >> > > 0x0000000100016386 in dyld_stub___cxa_throw () >> > > 2: x/i $pc 0x100016386 <dyld_stub___cxa_throw>: jmpq >> > *0xae1c(%rip) # 0x1000211a8 >> > > (gdb) >> > > 0x0000000102244870 in...

...atched to jump to > > > > garbage. > > > > > > > > > > Breakpoint 1, 0x0000000100001c19 in main () > > > > > (gdb) display/i $pc > > > > > 2: x/i $pc 0x100001c19 <main+318>: callq 0x100016386 > > > > <dyld_stub___cxa_throw> > > > > > (gdb) si > > > > > 0x0000000100016386 in dyld_stub___cxa_throw () > > > > > 2: x/i $pc 0x100016386 <dyld_stub___cxa_throw>: jmpq > > > > *0xae1c(%rip) # 0x1000211a8 > > > > > (gdb) > > &...