/*- * 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. * 4. 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. */ #if !defined(lint) && defined(LIBC_SCCS) static char rcsid[] = "$OpenBSD: gmon.c,v 1.8 1997/07/23 21:11:27 kstailey Exp $"; #endif /* * This file is taken from Cygwin distribution. Please keep it in sync. * The differences should be within __MINGW32__ guard. */ #include #include #include #ifndef __MINGW32__ #include #include #endif #include #include "gmon.h" #include "profil.h" /* XXX needed? */ //extern char *minbrk __asm ("minbrk"); #ifdef _WIN64 #define MINUS_ONE_P (-1LL) #else #define MINUS_ONE_P (-1) #endif #include #define bzero(ptr,size) memset (ptr, 0, size); struct gmonparam _gmonparam = { GMON_PROF_OFF, NULL, 0, NULL, 0, NULL, 0, 0L, 0, 0, 0, 0}; static int s_scale; /* see profil(2) where this is describe (incorrectly) */ #define SCALE_1_TO_1 0x10000L #define ERR(s) write(2, s, sizeof(s)) void moncontrol __P((int)); static void * fake_sbrk(int size) { void *rv = malloc(size); if (rv) return rv; else return (void *) MINUS_ONE_P; } void monstartup (size_t, size_t); void monstartup (size_t lowpc, size_t highpc) { register size_t o; char *cp; 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); cp = fake_sbrk(p->kcountsize + p->fromssize + p->tossize); if (cp == (char *)MINUS_ONE_P) { ERR("monstartup: out of memory\n"); return; } /* zero out cp as value will be added there */ bzero(cp, p->kcountsize + p->fromssize + p->tossize); p->tos = (struct tostruct *)cp; cp += p->tossize; p->kcount = (u_int16_t *)cp; cp += p->kcountsize; p->froms = (u_int16_t *)cp; /* XXX minbrk needed? */ //minbrk = fake_sbrk(0); 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); } void _mcleanup (void); void _mcleanup(void) { int fd; int hz; int fromindex; int endfrom; size_t frompc; int toindex; struct rawarc rawarc; struct gmonparam *p = &_gmonparam; struct gmonhdr gmonhdr, *hdr; char *filename = (char *) "gmon.out"; char *prefix; #ifdef DEBUG int log, len; char dbuf[200]; #endif if (p->state == GMON_PROF_ERROR) ERR("_mcleanup: tos overflow\n"); hz = PROF_HZ; moncontrol(0); /* We copy an undocumented glibc feature: customizing the profiler's output file name somewhat, depending on the env var GMON_OUT_PREFIX. if GMON_OUT_PREFIX is unspecified, the file's name is "gmon.out". if GMON_OUT_PREFIX is specified with at least one character, the file's name is computed as "$GMON_OUT_PREFIX.$pid". if GMON_OUT_PREFIX is specified but contains no characters, the file's name is computed as "gmon.out.$pid". Cygwin-specific. */ if ((prefix = getenv("GMON_OUT_PREFIX")) != NULL) { char *buf; /* Covers positive pid_t values. */ int32_t divisor = 1000*1000*1000; pid_t pid = getpid(); size_t len = strlen(prefix); if (len == 0) len = strlen(prefix = filename); buf = alloca(len + 13);// allow for '.', 10-digit pid, NUL, +1 memcpy(buf, prefix, len); buf[len++] = '.'; while (divisor > pid) // skip leading zeroes divisor /= 10; do { // convert pid to digits and store 'em buf[len++] = (pid / divisor) + '0'; pid %= divisor; } while (divisor /= 10); buf[len] = '\0'; filename = buf; } fd = open(filename, O_CREAT|O_TRUNC|O_WRONLY|O_BINARY, 0666); if (fd < 0) { perror(filename); return; } #ifdef DEBUG log = open("gmon.log", O_CREAT|O_TRUNC|O_WRONLY, 0664); if (log < 0) { perror("mcount: gmon.log"); return; } len = sprintf(dbuf, "[mcleanup1] kcount 0x%x ssiz %d\n", p->kcount, p->kcountsize); write(log, dbuf, len); #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 = hz; 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 len = sprintf(dbuf, "[mcleanup2] frompc 0x%x selfpc 0x%x count %d\n" , frompc, p->tos[toindex].selfpc, p->tos[toindex].count); write(log, dbuf, len); #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); } /* * 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((char *)0, 0, 0, 0); p->state = GMON_PROF_OFF; } }