driver_keil.c

extern void _bzero( void*, int ); 
extern char* _strncpy( char* , char* , int );
extern void* _malloc( int);
extern void _free( void* );
extern void* _memcpy( );
extern void* _signal( int signum, void (*fn)(int) );
extern unsigned int _alarm( unsigned int );

#define SIG_ALRM 14

int* alarmed;

void sig_handler1( int signum ) {
	*alarmed = 2;
}

void sig_handler2( int signum ) {
	*alarmed = 3;
}

int main( ) {
	char stringA[40] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabc\0";
	char stringB[40];
	//_bzero( stringB, 40 );
	_strncpy( stringB, stringA, 40 );
	_bzero( stringA, 40 );
	void* mem1 = _malloc( 1024 );
	void* mem2 = _malloc( 1024 );
	void* mem3 = _malloc( 8192 );
	void* mem4 = _malloc( 4096 );
	void* mem5 = _malloc( 512 );
	void* mem6 = _malloc( 1024 );
	void* mem7 = _malloc( 512 );
	_free( mem6 );
	_free( mem5 );
	_free( mem1 );
	_free( mem7 );
	_free( mem2 );
	void* mem8 = _malloc( 4096 );
	_free( mem4 );
	_free( mem3 );
	_free( mem8 );
	
	alarmed = (int *)_malloc( 4 );
	*alarmed = 1;
	_signal( SIG_ALRM, sig_handler1 );
	_alarm( 2 );

	while ( *alarmed != 2 ) {
		void* mem9 = _malloc( 4 );	
		_free( mem9 );		
	}

	_signal( SIG_ALRM, sig_handler2 );
	_alarm( 3 );
	while ( *alarmed != 3 ) {
		void* mem9 = _malloc( 4 );	
		_free( mem9 );
	}
	return 0;
}