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-rw-r--r--gmon/Makefile18
-rw-r--r--gmon/tst-gmon-gprof.sh60
-rw-r--r--gmon/tst-gmon.c50
3 files changed, 127 insertions, 1 deletions
diff --git a/gmon/Makefile b/gmon/Makefile
index 6ff4cb0dfb..947e6b5905 100644
--- a/gmon/Makefile
+++ b/gmon/Makefile
@@ -27,7 +27,7 @@ routines := gmon mcount profil sprofil bb_init_func bb_exit_func prof-freq
elide-routines.os = bb_init_func bb_exit_func
-tests = tst-sprofil
+tests = tst-sprofil tst-gmon
ifeq ($(build-profile),yes)
tests += tst-profile-static
tests-static += tst-profile-static
@@ -38,6 +38,12 @@ endif
# The mcount code won't work without a frame pointer.
CFLAGS-mcount.c := -fno-omit-frame-pointer
+CFLAGS-tst-gmon.c := -pg
+LDFLAGS-tst-gmon := $(no-pie-ldflag)
+CRT-tst-gmon := $(csu-objpfx)gcrt1.o
+tst-gmon-ENV := GMON_OUT_PREFIX=$(objpfx)tst-gmon.data
+tests-special += $(objpfx)tst-gmon-gprof.out
+
include ../Rules
# We cannot compile mcount.c with -pg because that would
@@ -53,3 +59,13 @@ endif
$(noprof:%=$(objpfx)%.op): %.op: %.o
rm -f $@
ln $< $@
+
+# GMON_OUTPUT_PREFIX only sets the output prefix. The actual file
+# name contains the PID as well.
+$(objpfx)tst-gmon.out: clean-tst-gmon-data
+clean-tst-gmon-data:
+ rm -f $(objpfx)tst-gmon.data.*
+
+$(objpfx)tst-gmon-gprof.out: tst-gmon-gprof.sh $(objpfx)tst-gmon.out
+ $(SHELL) $< $(GPROF) $(objpfx)tst-gmon $(objpfx)tst-gmon.data.* > $@; \
+ $(evaluate-test)
diff --git a/gmon/tst-gmon-gprof.sh b/gmon/tst-gmon-gprof.sh
new file mode 100644
index 0000000000..07887255c0
--- /dev/null
+++ b/gmon/tst-gmon-gprof.sh
@@ -0,0 +1,60 @@
+#!/bin/sh
+# Check the output of gprof against a carfully crafted binary.
+# Copyright (C) 2017 Free Software Foundation, Inc.
+# This file is part of the GNU C Library.
+
+# The GNU C Library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+
+# The GNU C Library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# Lesser General Public License for more details.
+
+# You should have received a copy of the GNU Lesser General Public
+# License along with the GNU C Library; if not, see
+# <http://www.gnu.org/licenses/>.
+
+LC_ALL=C
+export LC_ALL
+set -e
+exec 2>&1
+
+GPROF="$1"
+program="$2"
+data="$3"
+
+actual=$(mktemp)
+expected=$(mktemp)
+expected_dot=$(mktemp)
+cleanup () {
+ rm -f "$actual"
+ rm -f "$expected"
+ rm -f "$expected_dot"
+}
+trap cleanup 0
+
+cat > "$expected" <<EOF
+f1 2000
+f2 1000
+EOF
+
+# Special version for powerpc with function descriptors.
+cat > "$expected_dot" <<EOF
+.f1 2000
+.f2 1000
+EOF
+
+"$GPROF" -C "$program" "$data" \
+ | awk -F '[(): ]' '/executions/{print $5, $8}' \
+ | sort > "$actual"
+
+if cmp -s "$actual" "$expected_dot" \
+ || diff -u --label expected "$expected" --label actual "$actual" ; then
+ echo "PASS"
+else
+ echo "FAIL"
+ exit 1
+fi
diff --git a/gmon/tst-gmon.c b/gmon/tst-gmon.c
new file mode 100644
index 0000000000..ce81aa41b8
--- /dev/null
+++ b/gmon/tst-gmon.c
@@ -0,0 +1,50 @@
+/* Test program for profiling information collection (_mcount/gprof).
+ Copyright (C) 2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+/* This program does not use the test harness because we want tight
+ control over the call graph. */
+
+__attribute__ ((noinline, noclone, weak)) void
+f1 (void)
+{
+}
+
+__attribute__ ((noinline, noclone, weak)) void
+f2 (void)
+{
+ f1 ();
+ /* Prevent tail call. */
+ asm volatile ("");
+}
+
+__attribute__ ((noinline, noclone, weak)) void
+f3 (int count)
+{
+ for (int i = 0; i < count; ++i)
+ {
+ f1 ();
+ f2 ();
+ }
+}
+
+int
+main (void)
+{
+ f3 (1000);
+ return 0;
+}