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/* monitor.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).
*
* $Id$
*
* Copyright 1990, 1991, 1992, 1993, 1994, 1995, Oliver Laumann, Berlin
* Copyright 2002, 2003 Sam Hocevar <sam@hocevar.net>, Paris
*
* This software was derived from Elk 1.2, which was Copyright 1987, 1988,
* 1989, Nixdorf Computer AG and TELES GmbH, Berlin (Elk 1.2 has been written
* by Oliver Laumann for TELES Telematic Services, Berlin, in a joint project
* between TELES and Nixdorf Microprocessor Engineering, Berlin).
*
* Oliver Laumann, TELES GmbH, Nixdorf Computer AG and Sam Hocevar, as co-
* owners or individual owners of copyright in this software, grant to any
* person or company a worldwide, royalty free, license to
*
* i) copy this software,
* ii) prepare derivative works based on this software,
* iii) distribute copies of this software or derivative works,
* iv) perform this software, or
* v) display this software,
*
* provided that this notice is not removed and that neither Oliver Laumann
* nor Teles nor Nixdorf are deemed to have made any representations as to
* the suitability of this software for any purpose nor are held responsible
* for any defects of this software.
*
* THERE IS ABSOLUTELY NO WARRANTY FOR THIS SOFTWARE.
*/
/* 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 "config.h"
#include <sys/types.h>
#include <sys/gmon.h>
#include "scheme.h"
#define MONSTART 2
static int monitoring;
static Object P_Monitor (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);
}
}
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