Merged r262424-262425,265085

Add the -a option to pmcstat.  This produces a full stack track on the
sampled points.  See the man page for details on how this works.

Obtained from:  Netflix, Inc.

1 files changed, 127 insertions, 0 deletions

diff --git a/usr.sbin/pmcstat/pmcpl_annotate_cg.c b/usr.sbin/pmcstat/pmcpl_annotate_cg.c
new file mode 100644
index 0000000..e90bda1
--- /dev/null
+++ b/usr.sbin/pmcstat/pmcpl_annotate_cg.c
@@ -0,0 +1,127 @@
+/*-
+ * Copyright (c) 2005-2007, Joseph Koshy
+ * Copyright (c) 2007 The FreeBSD Foundation
+ * Copyright (c) 2014, Adrian Chadd, Netflix Inc.
+ * All rights reserved.
+ *
+ * Portions of this software were developed by A. Joseph Koshy under
+ * sponsorship from the FreeBSD Foundation and Google, Inc.
+ *
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+ */
+
+/*
+ * Transform a hwpmc(4) log into human readable form, and into
+ * gprof(1) compatible profiles.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/endian.h>
+#include <sys/gmon.h>
+#include <sys/imgact_aout.h>
+#include <sys/imgact_elf.h>
+#include <sys/mman.h>
+#include <sys/pmc.h>
+#include <sys/queue.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+
+#include <netinet/in.h>
+
+#include <assert.h>
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <gelf.h>
+#include <libgen.h>
+#include <limits.h>
+#include <netdb.h>
+#include <pmc.h>
+#include <pmclog.h>
+#include <sysexits.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "pmcstat.h"
+#include "pmcstat_log.h"
+#include "pmcpl_annotate_cg.h"
+
+/*
+ * Record a callchain.
+ */
+
+void
+pmcpl_annotate_cg_process(struct pmcstat_process *pp, struct pmcstat_pmcrecord *pmcr,
+    uint32_t nsamples, uintfptr_t *cc, int usermode, uint32_t cpu)
+{
+	struct pmcstat_pcmap *map;
+	struct pmcstat_symbol *sym;
+	uintfptr_t newpc;
+	struct pmcstat_image *image;
+	int i;
+	char filename[PATH_MAX], funcname[PATH_MAX];
+	unsigned sline;
+
+	(void) pmcr; (void) nsamples; (void) usermode; (void) cpu;
+
+	for (i = 0; i < (int) nsamples; i++) {
+		map = NULL;
+		sym = NULL;
+		image = NULL;
+		filename[0] = '\0';
+		funcname[0] = '\0';
+		sline = 0;
+
+		map = pmcstat_process_find_map(usermode ? pp : pmcstat_kernproc, cc[i]);
+		if (map != NULL) {
+			assert(cc[i] >= map->ppm_lowpc && cc[i] < map->ppm_highpc);
+			image = map->ppm_image;
+			newpc = cc[i] - (map->ppm_lowpc +
+				(image->pi_vaddr - image->pi_start));
+			sym = pmcstat_symbol_search(image, newpc);
+		}
+
+		if (map != NULL && image != NULL && sym != NULL) {
+			(void) pmcstat_image_addr2line(image, cc[i],
+			    filename, sizeof(filename), &sline, funcname, sizeof(funcname));
+		}
+
+		if (map != NULL && sym != NULL) {
+			fprintf(args.pa_graphfile, "%p %s %s:%d\n",
+			    (void *)cc[i],
+			    funcname,
+			    filename,
+			    sline);
+		} else {
+			fprintf(args.pa_graphfile, "%p <unknown> ??:0\n",
+			    (void *) cc[i]);
+		}
+	}
+	fprintf(args.pa_graphfile, "--\n");
+}