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-rw-r--r--gmon/gmon.c380
1 files changed, 219 insertions, 161 deletions
diff --git a/gmon/gmon.c b/gmon/gmon.c
index 3428016..8e47c52 100644
--- a/gmon/gmon.c
+++ b/gmon/gmon.c
@@ -30,203 +30,261 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
-
-#if !defined(lint) && defined(LIBC_SCCS)
-static char sccsid[] = "@(#)gmon.c 8.1 (Berkeley) 6/4/93";
-#endif
-
#include <sys/param.h>
#include <sys/time.h>
#include <sys/gmon.h>
+#include <sys/gmon_out.h>
+#include <ansidecl.h>
#include <stdio.h>
#include <fcntl.h>
+#include <unistd.h>
+
+#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
+struct __bb *__bb_head; /* Head of basic-block list or NULL. */
+
struct gmonparam _gmonparam = { GMON_PROF_OFF };
+/*
+ * See profil(2) where this is described:
+ */
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) - 1)
+#define ERR(s) write(2, s, sizeof(s))
+
+/*
+ * Discover the tick frequency of the machine if something goes wrong,
+ * we return 0, an impossible hertz.
+ */
+static int
+DEFUN_VOID(hertz)
+{
+ 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);
+}
+
+
+/*
+ * Control profiling
+ * profiling is what mcount checks to see if
+ * all the data structures are ready.
+ */
+void
+DEFUN(moncontrol, (mode), int mode)
+{
+ struct gmonparam *p = &_gmonparam;
+
+ if (mode)
+ {
+ /* start */
+ profil((void *) p->kcount, p->kcountsize, p->lowpc, s_scale);
+ p->state = GMON_PROF_ON;
+ }
+ else
+ {
+ /* stop */
+ profil((void *) 0, 0, 0, 0);
+ p->state = GMON_PROF_OFF;
+ }
+}
-void moncontrol __P((int));
-static int hertz __P((void));
void
-monstartup(lowpc, highpc)
- u_long lowpc;
- u_long highpc;
+DEFUN(monstartup, (lowpc, highpc), u_long lowpc AND u_long highpc)
{
- register int 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 / 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 = malloc (p->kcountsize + p->fromssize + p->tossize);
- if (! cp) {
- ERR("monstartup: out of memory\n");
- return;
- }
- bzero(cp, p->kcountsize + p->fromssize + p->tossize);
- p->tos = (struct tostruct *)cp;
- cp += p->tossize;
- p->kcount = (u_short *)cp;
- cp += p->kcountsize;
- p->froms = (u_short *)cp;
+ register int 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->log_hashfraction = -1;
+ if ((HASHFRACTION & (HASHFRACTION - 1)) == 0) {
+ /* if HASHFRACTION is a power of two, mcount can use shifting
+ instead of integer division. Precompute shift amount. */
+ p->log_hashfraction = ffs(p->hashfraction * sizeof(*p->froms)) - 1;
+ }
+ p->fromssize = p->textsize / 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);
- p->tos[0].link = 0;
+ cp = malloc (p->kcountsize + p->fromssize + p->tossize);
+ if (! cp)
+ {
+ ERR("monstartup: out of memory\n");
+ return;
+ }
+ bzero(cp, p->kcountsize + p->fromssize + p->tossize);
+ p->tos = (struct tostruct *)cp;
+ cp += p->tossize;
+ p->kcount = (u_short *)cp;
+ cp += p->kcountsize;
+ p->froms = (u_short *)cp;
- o = p->highpc - p->lowpc;
- if (p->kcountsize < o) {
+ p->tos[0].link = 0;
+
+ o = p->highpc - p->lowpc;
+ if (p->kcountsize < o)
+ {
#ifndef hp300
- 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);
+ s_scale = ((float)p->kcountsize / o ) * SCALE_1_TO_1;
+#else
+ /* avoid floating point operations */
+ 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;
+ } else
+ s_scale = SCALE_1_TO_1;
- moncontrol(1);
+ moncontrol(1);
}
-void
-_mcleanup()
+
+static void
+DEFUN(write_hist, (fd), int fd)
{
- int fd;
- int fromindex;
- int endfrom;
- u_long frompc;
- int toindex;
- struct rawarc rawarc;
- struct gmonparam *p = &_gmonparam;
- struct gmonhdr gmonhdr, *hdr;
-#ifdef DEBUG
- int log, len;
- char buf[200];
-#endif
+ const u_char tag = GMON_TAG_TIME_HIST;
+ struct gmon_hist_hdr thdr;
+ int size, rate;
- if (p->state == GMON_PROF_ERROR)
- ERR("_mcleanup: tos overflow\n");
+ if (_gmonparam.kcountsize > 0)
+ {
+ size = _gmonparam.kcountsize / sizeof(HISTCOUNTER);
+ rate = hertz();
+ bcopy(&_gmonparam.lowpc, &thdr.low_pc, sizeof(thdr.low_pc));
+ bcopy(&_gmonparam.highpc, &thdr.high_pc, sizeof(thdr.high_pc));
+ bcopy(&size, &thdr.hist_size, sizeof(thdr.hist_size));
+ bcopy(&rate, &thdr.prof_rate, sizeof(thdr.prof_rate));
+ strcpy(thdr.dimen, "seconds");
+ thdr.dimen_abbrev = 's';
- moncontrol(0);
- fd = open("gmon.out", O_CREAT|O_TRUNC|O_WRONLY, 0666);
- if (fd < 0) {
- perror("mcount: gmon.out");
- return;
- }
-#ifdef DEBUG
- log = open("gmon.log", O_CREAT|O_TRUNC|O_WRONLY, 0664);
- if (log < 0) {
- perror("mcount: gmon.log");
- return;
- }
- len = sprintf(buf, "[mcleanup1] kcount 0x%x ssiz %d\n",
- p->kcount, p->kcountsize);
- write(log, buf, len);
-#endif
- hdr = (struct gmonhdr *)&gmonhdr;
- hdr->lpc = p->lowpc;
- hdr->hpc = p->highpc;
- hdr->ncnt = p->kcountsize + sizeof(gmonhdr);
- hdr->version = GMONVERSION;
- hdr->profrate = hertz();
- 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(buf,
- "[mcleanup2] frompc 0x%x selfpc 0x%x count %d\n" ,
- frompc, p->tos[toindex].selfpc,
- p->tos[toindex].count);
- write(log, buf, 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);
+ write(fd, &tag, sizeof(tag));
+ write(fd, &thdr, sizeof(thdr));
+ write(fd, _gmonparam.kcount, _gmonparam.kcountsize);
+ }
}
-/*
- * Control profiling
- * profiling is what mcount checks to see if
- * all the data structures are ready.
- */
-void
-moncontrol(mode)
- int mode;
+
+static void
+DEFUN(write_call_graph, (fd), int fd)
{
- struct gmonparam *p = &_gmonparam;
-
- if (mode) {
- /* start */
- profil(p->kcount, p->kcountsize, (int)p->lowpc,
- s_scale);
- p->state = GMON_PROF_ON;
- } else {
- /* stop */
- profil(0, 0, 0, 0);
- p->state = GMON_PROF_OFF;
+ const u_char tag = GMON_TAG_CG_ARC;
+ struct gmon_cg_arc_record raw_arc;
+ int from_index, to_index, from_len;
+ u_long frompc;
+
+ from_len = _gmonparam.fromssize / sizeof(*_gmonparam.froms);
+ for (from_index = 0; from_index < from_len; ++from_index)
+ {
+ if (_gmonparam.froms[from_index] == 0)
+ continue;
+
+ frompc = _gmonparam.lowpc;
+ frompc += (from_index * _gmonparam.hashfraction
+ * sizeof(*_gmonparam.froms));
+ for (to_index = _gmonparam.froms[from_index];
+ to_index != 0;
+ to_index = _gmonparam.tos[to_index].link)
+ {
+ bcopy(&frompc, &raw_arc.from_pc, sizeof(raw_arc.from_pc));
+ bcopy(&_gmonparam.tos[to_index].selfpc, &raw_arc.self_pc,
+ sizeof(raw_arc.self_pc));
+ bcopy(&_gmonparam.tos[to_index].count, &raw_arc.count,
+ sizeof(raw_arc.count));
+
+ write(fd, &tag, sizeof(tag));
+ write(fd, &raw_arc, sizeof(raw_arc));
}
+ }
}
-/*
- * discover the tick frequency of the machine
- * if something goes wrong, we return 0, an impossible hertz.
- */
-static int
-hertz()
+
+static void
+DEFUN(write_bb_counts, (fd), int fd)
{
- 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);
+ struct __bb *grp;
+ const u_char tag = GMON_TAG_BB_COUNT;
+ int ncounts;
+ int i;
+
+ /* Write each group of basic-block info (all basic-blocks in a
+ compilation unit form a single group). */
+
+ for (grp = __bb_head; grp; grp = grp->next)
+ {
+ ncounts = grp->ncounts;
+ write(fd, &tag, sizeof(tag));
+ write(fd, &ncounts, sizeof(ncounts));
+ for (i = 0; i < ncounts; ++i)
+ {
+ write(fd, &grp->addresses[i], sizeof(grp->addresses[0]));
+ write(fd, &grp->counts[i], sizeof(grp->counts[0]));
+ }
+ }
}
+void
+DEFUN_VOID(_mcleanup)
+{
+ const int version = GMON_VERSION;
+ struct gmon_hdr ghdr;
+ int fd;
+
+ moncontrol(0);
+ fd = open("gmon.out", O_CREAT|O_TRUNC|O_WRONLY, 0666);
+ if (fd < 0)
+ {
+ perror("_mcleanup: gmon.out");
+ return;
+ }
+
+ /* write gmon.out header: */
+ bcopy(GMON_MAGIC, &ghdr.cookie[0], 4);
+ bcopy(&version, &ghdr.version, sizeof(version));
+ write(fd, &ghdr, sizeof(ghdr));
+
+ /* write PC histogram: */
+ write_hist(fd);
+
+ /* write call-graph: */
+ write_call_graph(fd);
+
+ /* write basic-block execution counts: */
+ write_bb_counts(fd);
+
+ close(fd);
+}