If anyone is on a very fresh version of K2.6 with extra patches can you
please run this code and see if it crashes. It fails on all K2.6 up to
Test6 release. I would be interested to hear of any success.
Here is what I get:
Getting from NULL
Setting Jump
Running
Signal 11 caught
After jump
Setting to NULL
Setting Jump
Running
Segmentation fault
There should be no segfault and another signal caught.
If there is any obvious blunder with this code let me know. Looks
pretty right to me though I don't use signals much at all.
--
Thanks
KenF
OpenOffice.org developer
#include <stdio.h>
#include <signal.h>
#include <setjmp.h>
/*************************************************************************
|* Typdeclarations for memory access test functions
*************************************************************************/
typedef int (*TestFunc)( void* );
/*************************************************************************
*************************************************************************/
static jmp_buf check_env;
static int bSignal;
static void SignalHdl( int sig )
{
bSignal = 1;
fprintf( stderr, "Signal %d caught\n", sig );
longjmp( check_env, sig );
}
/*************************************************************************
*************************************************************************/
void check( TestFunc func, void* p )
{
int result;
fprintf( stderr, "Setting Jump\n" );
if ( !setjmp( check_env ) )
{
signal( SIGSEGV, SignalHdl );
signal( SIGBUS, SignalHdl );
fprintf( stderr, "Running \n" );
result = func( p );
fprintf( stderr, "Finished \n" );
signal( SIGSEGV, SIG_DFL );
signal( SIGBUS, SIG_DFL );
}
fprintf( stderr, "After jump \n" );
}
/*************************************************************************
*************************************************************************/
static int GetAtAddress( void* p )
{
return *((char*)p);
}
/*************************************************************************
*************************************************************************/
static int SetAtAddress( void* p )
{
return *((char*)p) = 0;
}
/*************************************************************************
*************************************************************************/
void CheckGetAccess( void* p )
{
check( (TestFunc)GetAtAddress, p );
}
/*************************************************************************
*************************************************************************/
void CheckSetAccess( void* p )
{
check( (TestFunc)SetAtAddress, p );
}
/*************************************************************************
*************************************************************************/
int main( int argc, char* argv[] )
{
{
char* p = NULL;
fprintf( stderr, "Getting from NULL\n" );
CheckGetAccess( p );
fprintf( stderr, "Setting to NULL\n" );
CheckSetAccess( p );
fprintf( stderr, "After Setting to NULL\n" );
}
exit( 0 );
}
--
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