95 lines
2.9 KiB
C
95 lines
2.9 KiB
C
/* monitor.c: A trivial function to enable and disable execution profiling.
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*
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* Evaluate "(monitor #t)" to enable profiling; "(monitor #f)" to
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* disable profiling and create a mon.out (this is done automatically
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* on exit by means of an extension finalization function).
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*
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* $Id$
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*
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* Copyright 1990, 1991, 1992, 1993, 1994, 1995, Oliver Laumann, Berlin
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* Copyright 2002, 2003 Sam Hocevar <sam@zoy.org>, Paris
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*
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* This software was derived from Elk 1.2, which was Copyright 1987, 1988,
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* 1989, Nixdorf Computer AG and TELES GmbH, Berlin (Elk 1.2 has been written
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* by Oliver Laumann for TELES Telematic Services, Berlin, in a joint project
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* between TELES and Nixdorf Microprocessor Engineering, Berlin).
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*
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* Oliver Laumann, TELES GmbH, Nixdorf Computer AG and Sam Hocevar, as co-
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* owners or individual owners of copyright in this software, grant to any
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* person or company a worldwide, royalty free, license to
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*
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* i) copy this software,
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* ii) prepare derivative works based on this software,
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* iii) distribute copies of this software or derivative works,
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* iv) perform this software, or
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* v) display this software,
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*
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* provided that this notice is not removed and that neither Oliver Laumann
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* nor Teles nor Nixdorf are deemed to have made any representations as to
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* the suitability of this software for any purpose nor are held responsible
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* for any defects of this software.
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*
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* THERE IS ABSOLUTELY NO WARRANTY FOR THIS SOFTWARE.
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*/
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/* This extension may not work on some platforms.
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*
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* On DECstations running Ultrix, you may have to evaluate
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* (set! load-libraries "/usr/lib/cmplrs/cc/libprof1_G0.a -lc_G0")
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* before loading monitor.o.
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*
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* On older versions of BSD and SunOS you might have to
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* ar x /lib/libc.a mon.o
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* and replace in the symbol table of mon.o the symbols mcount and
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* _moncontrol by something else (e.g. Mcount and _Mcontrol); then
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* ld -r mon.o monitor.o; mv a.out monitor.o; rm mon.o
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* Or you might have to
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* cp /lib/mcrt0.o mon.o,
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* then, in mon.o, replace start by Start and _environ by _Environ
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* and call the linker as shown above. You can do the symbol table
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* hacking by editing mon.o with emacs.
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*/
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#include "config.h"
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#include <sys/types.h>
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#include <sys/gmon.h>
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#include "scheme.h"
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#define MONSTART 2
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static int monitoring;
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static Object P_Monitor (Object on) {
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char *brk;
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extern char *sbrk();
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Check_Type (on, T_Boolean);
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Disable_Interrupts;
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if (Truep (on)) {
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if (!monitoring) {
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brk = sbrk (0);
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monstartup ((int (*)())MONSTART, (int (*)())brk);
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monitoring = 1;
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}
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} else {
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monitor (0);
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monitoring = 0;
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}
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Enable_Interrupts;
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return Void;
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}
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void elk_init_lib_monitor () {
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Define_Primitive (P_Monitor, "monitor", 1, 1, EVAL);
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}
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void elk_finit_lib_monitor () {
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if (monitoring) {
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monitoring = 0;
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printf ("[writing mon.out]\n");
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monitor (0);
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}
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}
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