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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libc/gmon/gmon.c	Lines:	0	112	0.0 %
Date:	2017-11-07	Branches:	0	56	0.0 %


/*	$OpenBSD: gmon.c,v 1.30 2016/09/21 04:38:56 guenther Exp $ */
/*-
 * Copyright (c) 1983, 1992, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/time.h>
#include <sys/gmon.h>
#include <sys/mman.h>
#include <sys/sysctl.h>

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <limits.h>
#include <unistd.h>

struct gmonparam _gmonparam = { GMON_PROF_OFF };

static int	s_scale;
/* see profil(2) where this is describe (incorrectly) */
#define		SCALE_1_TO_1	0x10000L

#define ERR(s) write(STDERR_FILENO, s, sizeof(s))

PROTO_NORMAL(moncontrol);
PROTO_DEPRECATED(monstartup);
static int hertz(void);

void
monstartup(u_long lowpc, u_long highpc)
{
	int o;
	void *addr;
	struct gmonparam *p = &_gmonparam;

	/*
	 * round lowpc and highpc to multiples of the density we're using
	 * so the rest of the scaling (here and in gprof) stays in ints.
	 */
	p->lowpc = ROUNDDOWN(lowpc, HISTFRACTION * sizeof(HISTCOUNTER));
	p->highpc = ROUNDUP(highpc, HISTFRACTION * sizeof(HISTCOUNTER));
	p->textsize = p->highpc - p->lowpc;
	p->kcountsize = p->textsize / HISTFRACTION;
	p->hashfraction = HASHFRACTION;
	p->fromssize = p->textsize / p->hashfraction;
	p->tolimit = p->textsize * ARCDENSITY / 100;
	if (p->tolimit < MINARCS)
		p->tolimit = MINARCS;
	else if (p->tolimit > MAXARCS)
		p->tolimit = MAXARCS;
	p->tossize = p->tolimit * sizeof(struct tostruct);

	addr = mmap(NULL, p->kcountsize,  PROT_READ|PROT_WRITE,
	    MAP_ANON|MAP_PRIVATE, -1, 0);
	if (addr == MAP_FAILED)
		goto mapfailed;
	p->kcount = addr;

	addr = mmap(NULL, p->fromssize,  PROT_READ|PROT_WRITE,
	    MAP_ANON|MAP_PRIVATE, -1, 0);
	if (addr == MAP_FAILED)
		goto mapfailed;
	p->froms = addr;

	addr = mmap(NULL, p->tossize,  PROT_READ|PROT_WRITE,
	    MAP_ANON|MAP_PRIVATE, -1, 0);
	if (addr == MAP_FAILED)
		goto mapfailed;
	p->tos = addr;
	p->tos[0].link = 0;

	o = p->highpc - p->lowpc;
	if (p->kcountsize < o) {
#ifndef notdef
		s_scale = ((float)p->kcountsize / o ) * SCALE_1_TO_1;
#else /* avoid floating point */
		int quot = o / p->kcountsize;

		if (quot >= 0x10000)
			s_scale = 1;
		else if (quot >= 0x100)
			s_scale = 0x10000 / quot;
		else if (o >= 0x800000)
			s_scale = 0x1000000 / (o / (p->kcountsize >> 8));
		else
			s_scale = 0x1000000 / ((o << 8) / p->kcountsize);
#endif
	} else
		s_scale = SCALE_1_TO_1;

	moncontrol(1);
	return;

mapfailed:
	if (p->kcount != NULL) {
		munmap(p->kcount, p->kcountsize);
		p->kcount = NULL;
	}
	if (p->froms != NULL) {
		munmap(p->froms, p->fromssize);
		p->froms = NULL;
	}
	if (p->tos != NULL) {
		munmap(p->tos, p->tossize);
		p->tos = NULL;
	}
	ERR("monstartup: out of memory\n");
}
__strong_alias(_monstartup,monstartup);

void
_mcleanup(void)
{
	int fd;
	int fromindex;
	int endfrom;
	u_long frompc;
	int toindex;
	struct rawarc rawarc;
	struct gmonparam *p = &_gmonparam;
	struct gmonhdr gmonhdr, *hdr;
	struct clockinfo clockinfo;
	int mib[2];
	size_t size;
	char *profdir;
	char *proffile;
	char  buf[PATH_MAX];
#ifdef DEBUG
	int log, len;
	char dbuf[200];
#endif

	if (p->state == GMON_PROF_ERROR)
		ERR("_mcleanup: tos overflow\n");

	size = sizeof(clockinfo);
	mib[0] = CTL_KERN;
	mib[1] = KERN_CLOCKRATE;
	if (sysctl(mib, 2, &clockinfo, &size, NULL, 0) < 0) {
		/*
		 * Best guess
		 */
		clockinfo.profhz = hertz();
	} else if (clockinfo.profhz == 0) {
		if (clockinfo.hz != 0)
			clockinfo.profhz = clockinfo.hz;
		else
			clockinfo.profhz = hertz();
	}

	moncontrol(0);

	if (issetugid() == 0 && (profdir = getenv("PROFDIR")) != NULL) {
		char *s, *t, *limit;
		pid_t pid;
		long divisor;

		/* If PROFDIR contains a null value, no profiling
		   output is produced */
		if (*profdir == '\0') {
			return;
		}

		limit = buf + sizeof buf - 1 - 10 - 1 -
		    strlen(__progname) - 1;
		t = buf;
		s = profdir;
		while((*t = *s) != '\0' && t < limit) {
			t++;
			s++;
		}
		*t++ = '/';

		/*
		 * Copy and convert pid from a pid_t to a string.  For
		 * best performance, divisor should be initialized to
		 * the largest power of 10 less than PID_MAX.
		 */
		pid = getpid();
		divisor=10000;
		while (divisor > pid) divisor /= 10;	/* skip leading zeros */
		do {
			*t++ = (pid/divisor) + '0';
			pid %= divisor;
		} while (divisor /= 10);
		*t++ = '.';

		s = __progname;
		while ((*t++ = *s++) != '\0')
			;

		proffile = buf;
	} else {
		proffile = "gmon.out";
	}

	fd = open(proffile , O_CREAT|O_TRUNC|O_WRONLY, 0664);
	if (fd < 0) {
		perror( proffile );
		return;
	}
#ifdef DEBUG
	log = open("gmon.log", O_CREAT|O_TRUNC|O_WRONLY, 0664);
	if (log < 0) {
		perror("mcount: gmon.log");
		close(fd);
		return;
	}
	snprintf(dbuf, sizeof dbuf, "[mcleanup1] kcount 0x%x ssiz %d\n",
	    p->kcount, p->kcountsize);
	write(log, dbuf, strlen(dbuf));
#endif
	hdr = (struct gmonhdr *)&gmonhdr;
	bzero(hdr, sizeof(*hdr));
	hdr->lpc = p->lowpc;
	hdr->hpc = p->highpc;
	hdr->ncnt = p->kcountsize + sizeof(gmonhdr);
	hdr->version = GMONVERSION;
	hdr->profrate = clockinfo.profhz;
	write(fd, (char *)hdr, sizeof *hdr);
	write(fd, p->kcount, p->kcountsize);
	endfrom = p->fromssize / sizeof(*p->froms);
	for (fromindex = 0; fromindex < endfrom; fromindex++) {
		if (p->froms[fromindex] == 0)
			continue;

		frompc = p->lowpc;
		frompc += fromindex * p->hashfraction * sizeof(*p->froms);
		for (toindex = p->froms[fromindex]; toindex != 0;
		     toindex = p->tos[toindex].link) {
#ifdef DEBUG
			(void) snprintf(dbuf, sizeof dbuf,
			"[mcleanup2] frompc 0x%x selfpc 0x%x count %d\n" ,
				frompc, p->tos[toindex].selfpc,
				p->tos[toindex].count);
			write(log, dbuf, strlen(dbuf));
#endif
			rawarc.raw_frompc = frompc;
			rawarc.raw_selfpc = p->tos[toindex].selfpc;
			rawarc.raw_count = p->tos[toindex].count;
			write(fd, &rawarc, sizeof rawarc);
		}
	}
	close(fd);
#ifdef notyet
	if (p->kcount != NULL) {
		munmap(p->kcount, p->kcountsize);
		p->kcount = NULL;
	}
	if (p->froms != NULL) {
		munmap(p->froms, p->fromssize);
		p->froms = NULL;
	}
	if (p->tos != NULL) {
		munmap(p->tos, p->tossize);
		p->tos = NULL;
	}
#endif
}

/*
 * Control profiling
 *	profiling is what mcount checks to see if
 *	all the data structures are ready.
 */
void
moncontrol(int mode)
{
	struct gmonparam *p = &_gmonparam;

	if (mode) {
		/* start */
		profil((char *)p->kcount, p->kcountsize, p->lowpc,
		    s_scale);
		p->state = GMON_PROF_ON;
	} else {
		/* stop */
		profil(NULL, 0, 0, 0);
		p->state = GMON_PROF_OFF;
	}
}
DEF_WEAK(moncontrol);

/*
 * discover the tick frequency of the machine
 * if something goes wrong, we return 0, an impossible hertz.
 */
static int
hertz(void)
{
	struct itimerval tim;

	tim.it_interval.tv_sec = 0;
	tim.it_interval.tv_usec = 1;
	tim.it_value.tv_sec = 0;
	tim.it_value.tv_usec = 0;
	setitimer(ITIMER_REAL, &tim, 0);
	setitimer(ITIMER_REAL, 0, &tim);
	if (tim.it_interval.tv_usec < 2)
		return(0);
	return (1000000 / tim.it_interval.tv_usec);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: gmon.c,v 1.30 2016/09/21 04:38:56 guenther Exp $ */
2			/*-
3			* Copyright (c) 1983, 1992, 1993
4			* The Regents of the University of California. All rights reserved.
5			*
6			* Redistribution and use in source and binary forms, with or without
7			* modification, are permitted provided that the following conditions
8			* are met:
9			* 1. Redistributions of source code must retain the above copyright
10			* notice, this list of conditions and the following disclaimer.
11			* 2. Redistributions in binary form must reproduce the above copyright
12			* notice, this list of conditions and the following disclaimer in the
13			* documentation and/or other materials provided with the distribution.
14			* 3. Neither the name of the University nor the names of its contributors
15			* may be used to endorse or promote products derived from this software
16			* without specific prior written permission.
17			*
18			* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
19			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21			* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
22			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28			* SUCH DAMAGE.
29			*/
30
31			#include <sys/time.h>
32			#include <sys/gmon.h>
33			#include <sys/mman.h>
34			#include <sys/sysctl.h>
35
36			#include <stdio.h>
37			#include <stdlib.h>
38			#include <string.h>
39			#include <fcntl.h>
40			#include <limits.h>
41			#include <unistd.h>
42
43			struct gmonparam _gmonparam = { GMON_PROF_OFF };
44
45			static int s_scale;
46			/* see profil(2) where this is describe (incorrectly) */
47			#define SCALE_1_TO_1 0x10000L
48
49			#define ERR(s) write(STDERR_FILENO, s, sizeof(s))
50
51			PROTO_NORMAL(moncontrol);
52			PROTO_DEPRECATED(monstartup);
53			static int hertz(void);
54
55			void
56			monstartup(u_long lowpc, u_long highpc)
57			{
58			int o;
59			void *addr;
60			struct gmonparam *p = &_gmonparam;
61
62			/*
63			* round lowpc and highpc to multiples of the density we're using
64			* so the rest of the scaling (here and in gprof) stays in ints.
65			*/
66			p->lowpc = ROUNDDOWN(lowpc, HISTFRACTION * sizeof(HISTCOUNTER));
67			p->highpc = ROUNDUP(highpc, HISTFRACTION * sizeof(HISTCOUNTER));
68			p->textsize = p->highpc - p->lowpc;
69			p->kcountsize = p->textsize / HISTFRACTION;
70			p->hashfraction = HASHFRACTION;
71			p->fromssize = p->textsize / p->hashfraction;
72			p->tolimit = p->textsize * ARCDENSITY / 100;
73			if (p->tolimit < MINARCS)
74			p->tolimit = MINARCS;
75			else if (p->tolimit > MAXARCS)
76			p->tolimit = MAXARCS;
77			p->tossize = p->tolimit * sizeof(struct tostruct);
78
79			addr = mmap(NULL, p->kcountsize, PROT_READ\|PROT_WRITE,
80			MAP_ANON\|MAP_PRIVATE, -1, 0);
81			if (addr == MAP_FAILED)
82			goto mapfailed;
83			p->kcount = addr;
84
85			addr = mmap(NULL, p->fromssize, PROT_READ\|PROT_WRITE,
86			MAP_ANON\|MAP_PRIVATE, -1, 0);
87			if (addr == MAP_FAILED)
88			goto mapfailed;
89			p->froms = addr;
90
91			addr = mmap(NULL, p->tossize, PROT_READ\|PROT_WRITE,
92			MAP_ANON\|MAP_PRIVATE, -1, 0);
93			if (addr == MAP_FAILED)
94			goto mapfailed;
95			p->tos = addr;
96			p->tos[0].link = 0;
97
98			o = p->highpc - p->lowpc;
99			if (p->kcountsize < o) {
100			#ifndef notdef
101			s_scale = ((float)p->kcountsize / o ) * SCALE_1_TO_1;
102			#else /* avoid floating point */
103			int quot = o / p->kcountsize;
104
105			if (quot >= 0x10000)
106			s_scale = 1;
107			else if (quot >= 0x100)
108			s_scale = 0x10000 / quot;
109			else if (o >= 0x800000)
110			s_scale = 0x1000000 / (o / (p->kcountsize >> 8));
111			else
112			s_scale = 0x1000000 / ((o << 8) / p->kcountsize);
113			#endif
114			} else
115			s_scale = SCALE_1_TO_1;
116
117			moncontrol(1);
118			return;
119
120			mapfailed:
121			if (p->kcount != NULL) {
122			munmap(p->kcount, p->kcountsize);
123			p->kcount = NULL;
124			}
125			if (p->froms != NULL) {
126			munmap(p->froms, p->fromssize);
127			p->froms = NULL;
128			}
129			if (p->tos != NULL) {
130			munmap(p->tos, p->tossize);
131			p->tos = NULL;
132			}
133			ERR("monstartup: out of memory\n");
134			}
135			__strong_alias(_monstartup,monstartup);
136
137			void
138			_mcleanup(void)
139			{
140			int fd;
141			int fromindex;
142			int endfrom;
143			u_long frompc;
144			int toindex;
145			struct rawarc rawarc;
146			struct gmonparam *p = &_gmonparam;
147			struct gmonhdr gmonhdr, *hdr;
148			struct clockinfo clockinfo;
149			int mib[2];
150			size_t size;
151			char *profdir;
152			char *proffile;
153			char buf[PATH_MAX];
154			#ifdef DEBUG
155			int log, len;
156			char dbuf[200];
157			#endif
158
159			if (p->state == GMON_PROF_ERROR)
160			ERR("_mcleanup: tos overflow\n");
161
162			size = sizeof(clockinfo);
163			mib[0] = CTL_KERN;
164			mib[1] = KERN_CLOCKRATE;
165			if (sysctl(mib, 2, &clockinfo, &size, NULL, 0) < 0) {
166			/*
167			* Best guess
168			*/
169			clockinfo.profhz = hertz();
170			} else if (clockinfo.profhz == 0) {
171			if (clockinfo.hz != 0)
172			clockinfo.profhz = clockinfo.hz;
173			else
174			clockinfo.profhz = hertz();
175			}
176
177			moncontrol(0);
178
179			if (issetugid() == 0 && (profdir = getenv("PROFDIR")) != NULL) {
180			char s, t, *limit;
181			pid_t pid;
182			long divisor;
183
184			/* If PROFDIR contains a null value, no profiling
185			output is produced */
186			if (*profdir == '\0') {
187			return;
188			}
189
190			limit = buf + sizeof buf - 1 - 10 - 1 -
191			strlen(__progname) - 1;
192			t = buf;
193			s = profdir;
194			while((t = s) != '\0' && t < limit) {
195			t++;
196			s++;
197			}
198			*t++ = '/';
199
200			/*
201			* Copy and convert pid from a pid_t to a string. For
202			* best performance, divisor should be initialized to
203			* the largest power of 10 less than PID_MAX.
204			*/
205			pid = getpid();
206			divisor=10000;
207			while (divisor > pid) divisor /= 10; /* skip leading zeros */
208			do {
209			*t++ = (pid/divisor) + '0';
210			pid %= divisor;
211			} while (divisor /= 10);
212			*t++ = '.';
213
214			s = __progname;
215			while ((t++ = s++) != '\0')
216			;
217
218			proffile = buf;
219			} else {
220			proffile = "gmon.out";
221			}
222
223			fd = open(proffile , O_CREAT\|O_TRUNC\|O_WRONLY, 0664);
224			if (fd < 0) {
225			perror( proffile );
226			return;
227			}
228			#ifdef DEBUG
229			log = open("gmon.log", O_CREAT\|O_TRUNC\|O_WRONLY, 0664);
230			if (log < 0) {
231			perror("mcount: gmon.log");
232			close(fd);
233			return;
234			}
235			snprintf(dbuf, sizeof dbuf, "[mcleanup1] kcount 0x%x ssiz %d\n",
236			p->kcount, p->kcountsize);
237			write(log, dbuf, strlen(dbuf));
238			#endif
239			hdr = (struct gmonhdr *)&gmonhdr;
240			bzero(hdr, sizeof(*hdr));
241			hdr->lpc = p->lowpc;
242			hdr->hpc = p->highpc;
243			hdr->ncnt = p->kcountsize + sizeof(gmonhdr);
244			hdr->version = GMONVERSION;
245			hdr->profrate = clockinfo.profhz;
246			write(fd, (char )hdr, sizeof hdr);
247			write(fd, p->kcount, p->kcountsize);
248			endfrom = p->fromssize / sizeof(*p->froms);
249			for (fromindex = 0; fromindex < endfrom; fromindex++) {
250			if (p->froms[fromindex] == 0)
251			continue;
252
253			frompc = p->lowpc;
254			frompc += fromindex * p->hashfraction * sizeof(*p->froms);
255			for (toindex = p->froms[fromindex]; toindex != 0;
256			toindex = p->tos[toindex].link) {
257			#ifdef DEBUG
258			(void) snprintf(dbuf, sizeof dbuf,
259			"[mcleanup2] frompc 0x%x selfpc 0x%x count %d\n" ,
260			frompc, p->tos[toindex].selfpc,
261			p->tos[toindex].count);
262			write(log, dbuf, strlen(dbuf));
263			#endif
264			rawarc.raw_frompc = frompc;
265			rawarc.raw_selfpc = p->tos[toindex].selfpc;
266			rawarc.raw_count = p->tos[toindex].count;
267			write(fd, &rawarc, sizeof rawarc);
268			}
269			}
270			close(fd);
271			#ifdef notyet
272			if (p->kcount != NULL) {
273			munmap(p->kcount, p->kcountsize);
274			p->kcount = NULL;
275			}
276			if (p->froms != NULL) {
277			munmap(p->froms, p->fromssize);
278			p->froms = NULL;
279			}
280			if (p->tos != NULL) {
281			munmap(p->tos, p->tossize);
282			p->tos = NULL;
283			}
284			#endif
285			}
286
287			/*
288			* Control profiling
289			* profiling is what mcount checks to see if
290			* all the data structures are ready.
291			*/
292			void
293			moncontrol(int mode)
294			{
295			struct gmonparam *p = &_gmonparam;
296
297			if (mode) {
298			/* start */
299			profil((char *)p->kcount, p->kcountsize, p->lowpc,
300			s_scale);
301			p->state = GMON_PROF_ON;
302			} else {
303			/* stop */
304			profil(NULL, 0, 0, 0);
305			p->state = GMON_PROF_OFF;
306			}
307			}
308			DEF_WEAK(moncontrol);
309
310			/*
311			* discover the tick frequency of the machine
312			* if something goes wrong, we return 0, an impossible hertz.
313			*/
314			static int
315			hertz(void)
316			{
317			struct itimerval tim;
318
319			tim.it_interval.tv_sec = 0;
320			tim.it_interval.tv_usec = 1;
321			tim.it_value.tv_sec = 0;
322			tim.it_value.tv_usec = 0;
323			setitimer(ITIMER_REAL, &tim, 0);
324			setitimer(ITIMER_REAL, 0, &tim);
325			if (tim.it_interval.tv_usec < 2)
326			return(0);
327			return (1000000 / tim.it_interval.tv_usec);
328			}