https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102993
Bug ID: 102993
Summary: -mcf-protection=full produces segfaulting code when
targeting 32-bit x86 (i686)
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: other
Assignee: unassigned at gcc dot gnu.org
Reporter: luke-jr+gccbugs at utopios dot org
Target Milestone: ---
Generated programs, when throwing(catching?) an exception, jump to address 0
and crash.
Instead, the compiler should either reject the option, ignore it, or produce
working code.
#include <stdexcept>
void b(){
throw std::runtime_error("hi");
}
int main(){
try{
b();
}catch(...){}
}
(gdb) bt
#0 0x00401657 in ?? ()
#1 0x00401386 in ?? ()
#2 0x7b454882 in call_process_entry () from
/usr/lib/wine/../i386-linux-gnu/wine/kernel32.dll.so
#3 0x7b454cfc in start_process () from
/usr/lib/wine/../i386-linux-gnu/wine/kernel32.dll.so
#4 0x7b45488e in __wine_start_process () from
/usr/lib/wine/../i386-linux-gnu/wine/kernel32.dll.so
#5 0x00000000 in ?? ()
}catch(...){
401657: 89 04 24 mov %eax,(%esp)
40165a: e8 49 00 00 00 call 4016a8 <___cxa_begin_catch>
40165f: c7 45 b8 ff ff ff ff movl $0xffffffff,-0x48(%ebp)
401666: e8 35 00 00 00 call 4016a0 <___cxa_end_catch>
40166b: eb d6 jmp 401643 <_main+0x5e>
40166d: 8d 45 b4 lea -0x4c(%ebp),%eax
401670: 89 04 24 mov %eax,(%esp)
401673: e8 68 10 00 00 call 4026e0
<__Unwind_SjLj_Unregister>
