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gmon: Add test for basic mcount/gprof functionality
This commit is contained in:
Florian Weimer
parent
ee72219a49
commit
6014c65de2
15
ChangeLog
15
ChangeLog
@ -1,3 +1,18 @@
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2017-08-15 Florian Weimer <fweimer@redhat.com>
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* gmon/Makefile (tests): Add tst-gmon.
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(CFLAGS-tst-gmon.c, LDFLAGS-tst-gmon, CRT-tst-gmon, tst-gmon-ENV):
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Set.
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(tests-special): Add tst-gmon-prof.out.
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(tst-gmon.out): Depend on clean-tst-gmon-data.
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(clean-tst-gmon-data, tst-gmon-gprof.out): New targets.
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* gmon/tst-gmon.c, gmon/tst-gmon-gprof.sh: New files.
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* Makeconfig (+link-before-libc): Add CRT-* hook to override the
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startup object.
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* aclocal.m4 (GPROF): Set and substitute.
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* config.amke.in (GPROF): Set.
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* configure: Regenerate.
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2017-08-15 Gustavo Romero <gromero@linux.vnet.ibm.com>
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* elf/elf.h A (NT_PPC_TAR): New macro.
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@ -465,7 +465,7 @@ else # not build-pie-default
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+link-before-libc = $(CC) -nostdlib -nostartfiles -o $@ \
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$(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
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$(combreloc-LDFLAGS) $(relro-LDFLAGS) $(hashstyle-LDFLAGS) \
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$(addprefix $(csu-objpfx),$(start-installed-name)) \
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$(firstword $(CRT-$(@F)) $(csu-objpfx)$(start-installed-name)) \
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$(+preinit) $(+prector) \
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$(filter-out $(addprefix $(csu-objpfx),start.o \
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$(start-installed-name))\
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2
aclocal.m4
vendored
2
aclocal.m4
vendored
@ -121,6 +121,8 @@ OBJDUMP=`$CC -print-prog-name=objdump`
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AC_SUBST(OBJDUMP)
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OBJCOPY=`$CC -print-prog-name=objcopy`
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AC_SUBST(OBJCOPY)
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GPROF=`$CC -print-prog-name=gprof`
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AC_SUBST(GPROF)
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# Determine whether we are using GNU binutils.
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AC_CACHE_CHECK(whether $AS is GNU as, libc_cv_prog_as_gnu,
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@ -120,6 +120,7 @@ BISON = @BISON@
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AUTOCONF = @AUTOCONF@
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OBJDUMP = @OBJDUMP@
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OBJCOPY = @OBJCOPY@
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GPROF = @GPROF@
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READELF = @READELF@
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# Installation tools.
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3
configure
vendored
3
configure
vendored
@ -651,6 +651,7 @@ MSGFMT
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MAKE
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LD
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AS
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GPROF
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OBJCOPY
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OBJDUMP
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AR
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@ -4572,6 +4573,8 @@ OBJDUMP=`$CC -print-prog-name=objdump`
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OBJCOPY=`$CC -print-prog-name=objcopy`
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GPROF=`$CC -print-prog-name=gprof`
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# Determine whether we are using GNU binutils.
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $AS is GNU as" >&5
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@ -27,7 +27,7 @@ routines := gmon mcount profil sprofil bb_init_func bb_exit_func prof-freq
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elide-routines.os = bb_init_func bb_exit_func
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tests = tst-sprofil
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tests = tst-sprofil tst-gmon
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ifeq ($(build-profile),yes)
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tests += tst-profile-static
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tests-static += tst-profile-static
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@ -38,6 +38,12 @@ endif
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# The mcount code won't work without a frame pointer.
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CFLAGS-mcount.c := -fno-omit-frame-pointer
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CFLAGS-tst-gmon.c := -pg
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LDFLAGS-tst-gmon := $(no-pie-ldflag)
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CRT-tst-gmon := $(csu-objpfx)gcrt1.o
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tst-gmon-ENV := GMON_OUT_PREFIX=$(objpfx)tst-gmon.data
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tests-special += $(objpfx)tst-gmon-gprof.out
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include ../Rules
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# We cannot compile mcount.c with -pg because that would
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@ -53,3 +59,13 @@ endif
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$(noprof:%=$(objpfx)%.op): %.op: %.o
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rm -f $@
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ln $< $@
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# GMON_OUTPUT_PREFIX only sets the output prefix. The actual file
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# name contains the PID as well.
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$(objpfx)tst-gmon.out: clean-tst-gmon-data
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clean-tst-gmon-data:
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rm -f $(objpfx)tst-gmon.data.*
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$(objpfx)tst-gmon-gprof.out: tst-gmon-gprof.sh $(objpfx)tst-gmon.out
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$(SHELL) $< $(GPROF) $(objpfx)tst-gmon $(objpfx)tst-gmon.data.* > $@; \
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$(evaluate-test)
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60
gmon/tst-gmon-gprof.sh
Normal file
60
gmon/tst-gmon-gprof.sh
Normal file
@ -0,0 +1,60 @@
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#!/bin/sh
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# Check the output of gprof against a carfully crafted binary.
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# Copyright (C) 2017 Free Software Foundation, Inc.
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# This file is part of the GNU C Library.
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# The GNU C Library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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# The GNU C Library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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# You should have received a copy of the GNU Lesser General Public
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# License along with the GNU C Library; if not, see
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# <http://www.gnu.org/licenses/>.
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LC_ALL=C
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export LC_ALL
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set -e
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exec 2>&1
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GPROF="$1"
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program="$2"
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data="$3"
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actual=$(mktemp)
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expected=$(mktemp)
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expected_dot=$(mktemp)
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cleanup () {
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rm -f "$actual"
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rm -f "$expected"
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rm -f "$expected_dot"
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}
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trap cleanup 0
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cat > "$expected" <<EOF
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f1 2000
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f2 1000
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EOF
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# Special version for powerpc with function descriptors.
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cat > "$expected_dot" <<EOF
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.f1 2000
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.f2 1000
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EOF
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"$GPROF" -C "$program" "$data" \
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| awk -F '[(): ]' '/executions/{print $5, $8}' \
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| sort > "$actual"
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if cmp -s "$actual" "$expected_dot" \
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|| diff -u --label expected "$expected" --label actual "$actual" ; then
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echo "PASS"
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else
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echo "FAIL"
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exit 1
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fi
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50
gmon/tst-gmon.c
Normal file
50
gmon/tst-gmon.c
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@ -0,0 +1,50 @@
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/* Test program for profiling information collection (_mcount/gprof).
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Copyright (C) 2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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/* This program does not use the test harness because we want tight
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control over the call graph. */
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__attribute__ ((noinline, noclone, weak)) void
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f1 (void)
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{
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}
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__attribute__ ((noinline, noclone, weak)) void
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f2 (void)
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{
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f1 ();
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/* Prevent tail call. */
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asm volatile ("");
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}
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__attribute__ ((noinline, noclone, weak)) void
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f3 (int count)
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{
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for (int i = 0; i < count; ++i)
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{
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f1 ();
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f2 ();
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}
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}
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int
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main (void)
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{
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f3 (1000);
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return 0;
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}
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