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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen master] gcov: Add small utility to deal with test coverage information from Xen
commit eb459da88574d295152cdff20e67486b08c3066d
Author: Frediano Ziglio <frediano.ziglio@xxxxxxxxxx>
AuthorDate: Thu Feb 14 12:37:16 2013 +0000
Commit: Keir Fraser <keir.xen@xxxxxxxxx>
CommitDate: Thu Feb 21 16:28:11 2013 +0000
gcov: Add small utility to deal with test coverage information from Xen
Currently the utility can read and reset coverage informations.
Signed-off-by: Frediano Ziglio <frediano.ziglio@xxxxxxxxxx>
---
.gitignore | 1 +
.hgignore | 1 +
tools/misc/Makefile | 8 ++-
tools/misc/xencov.c | 152 +++++++++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 160 insertions(+), 2 deletions(-)
diff --git a/.gitignore b/.gitignore
index b6e97ca..ce6eeb3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -229,6 +229,7 @@ tools/misc/gtraceview
tools/misc/gtracestat
tools/misc/xenlockprof
tools/misc/lowmemd
+tools/misc/xencov
tools/pygrub/build/*
tools/python/build/*
tools/python/xen/util/path.py
diff --git a/.hgignore b/.hgignore
index a4466d2..6b432f7 100644
--- a/.hgignore
+++ b/.hgignore
@@ -224,6 +224,7 @@
^tools/misc/gtraceview$
^tools/misc/gtracestat$
^tools/misc/xenlockprof$
+^tools/misc/xencov$
^tools/pygrub/build/.*$
^tools/python/build/.*$
^tools/python/xen/util/path\.py$
diff --git a/tools/misc/Makefile b/tools/misc/Makefile
index 22e60fd..eef9411 100644
--- a/tools/misc/Makefile
+++ b/tools/misc/Makefile
@@ -9,7 +9,7 @@ CFLAGS += $(CFLAGS_libxenstore)
HDRS = $(wildcard *.h)
-TARGETS-y := xenperf xenpm xen-tmem-list-parse gtraceview gtracestat
xenlockprof xenwatchdogd
+TARGETS-y := xenperf xenpm xen-tmem-list-parse gtraceview gtracestat
xenlockprof xenwatchdogd xencov
TARGETS-$(CONFIG_X86) += xen-detect xen-hvmctx xen-hvmcrash xen-lowmemd
TARGETS-$(CONFIG_MIGRATE) += xen-hptool
TARGETS := $(TARGETS-y)
@@ -22,7 +22,8 @@ INSTALL_BIN-y := xencons
INSTALL_BIN-$(CONFIG_X86) += xen-detect
INSTALL_BIN := $(INSTALL_BIN-y)
-INSTALL_SBIN-y := xm xen-bugtool xen-python-path xend xenperf xsview xenpm
xen-tmem-list-parse gtraceview gtracestat xenlockprof xenwatchdogd xen-ringwatch
+INSTALL_SBIN-y := xm xen-bugtool xen-python-path xend xenperf xsview xenpm
xen-tmem-list-parse gtraceview \
+ gtracestat xenlockprof xenwatchdogd xen-ringwatch xencov
INSTALL_SBIN-$(CONFIG_X86) += xen-hvmctx xen-hvmcrash xen-lowmemd
INSTALL_SBIN-$(CONFIG_MIGRATE) += xen-hptool
INSTALL_SBIN := $(INSTALL_SBIN-y)
@@ -85,4 +86,7 @@ xen-lowmemd: xen-lowmemd.o
gtraceview: gtraceview.o
$(CC) $(LDFLAGS) -o $@ $< $(CURSES_LIBS) $(APPEND_LDFLAGS)
+xencov: xencov.o
+ $(CC) $(LDFLAGS) -o $@ $< $(LDLIBS_libxenctrl) $(APPEND_LDFLAGS)
+
-include $(DEPS)
diff --git a/tools/misc/xencov.c b/tools/misc/xencov.c
new file mode 100644
index 0000000..6645a30
--- /dev/null
+++ b/tools/misc/xencov.c
@@ -0,0 +1,152 @@
+/*
+ * xencov: handle test coverage information from Xen.
+ *
+ * Copyright (c) 2013, Citrix Systems R&D Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include <xenctrl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <err.h>
+#include <sys/mman.h>
+
+static xc_interface *gcov_xch = NULL;
+
+static void gcov_init(void)
+{
+ gcov_xch = xc_interface_open(NULL, NULL, 0);
+ if ( !gcov_xch )
+ err(1, "opening interface");
+}
+
+int gcov_get_info(int op, struct xen_sysctl *sys, void *ptr)
+{
+ struct xen_sysctl_coverage_op *cov;
+
+ memset(sys, 0, sizeof(*sys));
+ sys->cmd = XEN_SYSCTL_coverage_op;
+
+ cov = &sys->u.coverage_op;
+ cov->cmd = op;
+ cov->u.raw_info.p = ptr;
+
+ return xc_sysctl(gcov_xch, sys);
+}
+
+static void gcov_read(const char *fn, int reset)
+{
+ struct xen_sysctl sys;
+ unsigned page_size = sysconf(_SC_PAGESIZE);
+ uint32_t total_len;
+ uint8_t *p;
+ size_t size;
+ FILE *f;
+ int op = reset ? XEN_SYSCTL_COVERAGE_read_and_reset :
+ XEN_SYSCTL_COVERAGE_read;
+
+ /* get total length */
+ if ( gcov_get_info(XEN_SYSCTL_COVERAGE_get_total_size, &sys, NULL) < 0 )
+ err(1, "getting total length");
+ total_len = sys.u.coverage_op.u.total_size;
+ fprintf(stderr, "returned %u bytes\n", (unsigned) total_len);
+
+ /* safe check */
+ if ( total_len > 16u * 1024u * 1024u )
+ errx(1, "coverage size too big %u bytes\n", total_len);
+
+ /* allocate */
+ size = total_len + page_size;
+ size -= (size % page_size);
+ p = mmap(0, size, PROT_WRITE|PROT_READ,
+ MAP_PRIVATE|MAP_ANON|MAP_LOCKED, -1, 0);
+ if ( p == (uint8_t *) -1 )
+ err(1, "mapping memory for coverage");
+
+ /* get data */
+ memset(p, 0, total_len);
+ if ( gcov_get_info(op, &sys, p) < 0 )
+ err(1, "getting coverage information");
+
+ /* write to a file */
+ if ( strcmp(fn, "-") == 0 )
+ f = stdout;
+ else
+ f = fopen(fn, "w");
+ if ( !f )
+ err(1, "opening output file");
+ if ( fwrite(p, 1, total_len, f) != total_len )
+ err(1, "writing coverage to file");
+ if (f != stdout)
+ fclose(f);
+}
+
+static void gcov_reset(void)
+{
+ struct xen_sysctl sys;
+
+ if ( gcov_get_info(XEN_SYSCTL_COVERAGE_reset, &sys, NULL) < 0 )
+ err(1, "resetting coverage information");
+}
+
+static void usage(int exit_code)
+{
+ FILE *out = exit_code ? stderr : stdout;
+
+ fprintf(out, "xencov {reset|read|read-reset} [<filename>]\n"
+ "\treset reset information\n"
+ "\tread read information from xen to filename\n"
+ "\tread-reset read and reset information from xen to filename\n"
+ "\tfilename optional filename (default output)\n"
+ );
+ exit(exit_code);
+}
+
+int main(int argc, char **argv)
+{
+ int opt;
+
+ while ((opt = getopt(argc, argv, "h")) != -1) {
+ switch (opt) {
+ case 'h':
+ usage(0);
+ break;
+ default:
+ usage(1);
+ }
+ }
+
+ argv += optind;
+ argc -= optind;
+ if (argc <= 0)
+ usage(1);
+
+ gcov_init();
+
+ if ( strcmp(argv[0], "reset") == 0 )
+ gcov_reset();
+ else if ( strcmp(argv[0], "read") == 0 )
+ gcov_read(argc > 1 ? argv[1] : "-", 0);
+ else if ( strcmp(argv[0], "read-reset") == 0 )
+ gcov_read(argc > 1 ? argv[1] : "-", 1);
+ else
+ usage(1);
+
+ return 0;
+}
+
--
generated by git-patchbot for /home/xen/git/xen.git#master
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