66 lines
1.6 KiB
C
66 lines
1.6 KiB
C
/* A trivial function to enable and disable execution profiling.
|
|
*
|
|
* Evaluate "(monitor #t)" to enable profiling; "(monitor #f)" to
|
|
* disable profiling and create a mon.out (this is done automatically
|
|
* on exit by means of an extension finalization function).
|
|
*
|
|
*
|
|
* This extension may not work on some platforms.
|
|
*
|
|
* On DECstations running Ultrix, you may have to evaluate
|
|
* (set! load-libraries "/usr/lib/cmplrs/cc/libprof1_G0.a -lc_G0")
|
|
* before loading monitor.o.
|
|
*
|
|
* On older versions of BSD and SunOS you might have to
|
|
* ar x /lib/libc.a mon.o
|
|
* and replace in the symbol table of mon.o the symbols mcount and
|
|
* _moncontrol by something else (e.g. Mcount and _Mcontrol); then
|
|
* ld -r mon.o monitor.o; mv a.out monitor.o; rm mon.o
|
|
* Or you might have to
|
|
* cp /lib/mcrt0.o mon.o,
|
|
* then, in mon.o, replace start by Start and _environ by _Environ
|
|
* and call the linker as shown above. You can do the symbol table
|
|
* hacking by editing mon.o with emacs.
|
|
*/
|
|
|
|
|
|
#include "scheme.h"
|
|
|
|
#include <sys/types.h>
|
|
|
|
#define MONSTART 2
|
|
|
|
static monitoring;
|
|
|
|
static Object P_Monitor (on) Object on; {
|
|
char *brk;
|
|
extern char *sbrk();
|
|
|
|
Check_Type (on, T_Boolean);
|
|
Disable_Interrupts;
|
|
if (Truep (on)) {
|
|
if (!monitoring) {
|
|
brk = sbrk (0);
|
|
monstartup ((int (*)())MONSTART, (int (*)())brk);
|
|
monitoring = 1;
|
|
}
|
|
} else {
|
|
monitor (0);
|
|
monitoring = 0;
|
|
}
|
|
Enable_Interrupts;
|
|
return Void;
|
|
}
|
|
|
|
void elk_init_lib_monitor () {
|
|
Define_Primitive (P_Monitor, "monitor", 1, 1, EVAL);
|
|
}
|
|
|
|
void elk_finit_lib_monitor () {
|
|
if (monitoring) {
|
|
monitoring = 0;
|
|
printf ("[writing mon.out]\n");
|
|
monitor (0);
|
|
}
|
|
}
|