From 07d100d43e70e856c802fec9b584f94c8efbd79d Mon Sep 17 00:00:00 2001 From: Yao Qi Date: Fri, 22 Nov 2013 17:00:57 +0800 Subject: [PATCH] Perf test case: skip-prologue This patch add a perf test case on skip-prologue by inserting breakpoints on two functions many times, in order to exercise skip-prologue. gdb/testsuite: 2013-12-15 Yao Qi * gdb.perf/skip-prologue.c: New. * gdb.perf/skip-prologue.exp: New. * gdb.perf/skip-prologue.py: New. --- gdb/testsuite/ChangeLog | 6 +++ gdb/testsuite/gdb.perf/skip-prologue.c | 48 +++++++++++++++++ gdb/testsuite/gdb.perf/skip-prologue.exp | 69 ++++++++++++++++++++++++ gdb/testsuite/gdb.perf/skip-prologue.py | 42 +++++++++++++++ 4 files changed, 165 insertions(+) create mode 100644 gdb/testsuite/gdb.perf/skip-prologue.c create mode 100644 gdb/testsuite/gdb.perf/skip-prologue.exp create mode 100644 gdb/testsuite/gdb.perf/skip-prologue.py diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog index dbdc00001a..b9f98f751c 100644 --- a/gdb/testsuite/ChangeLog +++ b/gdb/testsuite/ChangeLog @@ -1,3 +1,9 @@ +2013-12-15 Yao Qi + + * gdb.perf/skip-prologue.c: New. + * gdb.perf/skip-prologue.exp: New. + * gdb.perf/skip-prologue.py: New. + 2013-12-13 Joel Brobecker * gdb.ada/arraydim: New testcase. diff --git a/gdb/testsuite/gdb.perf/skip-prologue.c b/gdb/testsuite/gdb.perf/skip-prologue.c new file mode 100644 index 0000000000..a195f55bd8 --- /dev/null +++ b/gdb/testsuite/gdb.perf/skip-prologue.c @@ -0,0 +1,48 @@ +/* This testcase is part of GDB, the GNU debugger. + + Copyright (C) 2013 Free Software Foundation, Inc. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program 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 General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . */ + +/* GDB will analyze the prologue of functions f1 and f2. */ + +struct foo +{ + int a[32]; +}; + +static int +f1 (void) +{ + return 0; +} + +static double +f2 (int a, long long b, double c, struct foo f) +{ + f.a[0] = a + (int) b + c; + + return c + 0.2; +} + +int +main (void) +{ + struct foo f; + + f1 (); + f2 (0, 0, 0.1, f); + + return 0; +} diff --git a/gdb/testsuite/gdb.perf/skip-prologue.exp b/gdb/testsuite/gdb.perf/skip-prologue.exp new file mode 100644 index 0000000000..53ada494f7 --- /dev/null +++ b/gdb/testsuite/gdb.perf/skip-prologue.exp @@ -0,0 +1,69 @@ +# Copyright (C) 2013 Free Software Foundation, Inc. + +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3 of the License, or +# (at your option) any later version. +# +# This program 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 General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see . + +# This test case is to test the performance of GDB when it analyzes the +# function prologue. +# There is one parameter in this test: +# - SKIP_PROLOGUE_COUNT is the number that GDB inserts breakpoints on +# function f1 and f2 and removes them. + +load_lib perftest.exp + +if [skip_perf_tests] { + return 0 +} + +standard_testfile .c +set executable $testfile +set expfile $testfile.exp + +# make check-perf RUNTESTFLAGS='skip-prologue.exp SKIP_PROLOGUE_COUNT=500' +if ![info exists SKIP_PROLOGUE_COUNT] { + set SKIP_PROLOGUE_COUNT 500 +} + +PerfTest::assemble { + global srcdir subdir srcfile binfile + + if { [gdb_compile "$srcdir/$subdir/$srcfile" ${binfile} executable {debug}] != "" } { + return -1 + } + + return 0 +} { + global binfile + global gdb_prompt + + clean_restart $binfile + + if ![runto_main] { + fail "Can't run to main" + return -1 + } +} { + global SKIP_PROLOGUE_COUNT + + set test "run" + gdb_test_multiple "python SkipPrologue\($SKIP_PROLOGUE_COUNT\).run()" $test { + -re "Breakpoint $decimal at \[^\n\]*\n" { + # GDB prints some messages on breakpoint creation. + # Consume the output to avoid internal buffer full. + exp_continue + } + -re ".*$gdb_prompt $" { + pass $test + } + } +} diff --git a/gdb/testsuite/gdb.perf/skip-prologue.py b/gdb/testsuite/gdb.perf/skip-prologue.py new file mode 100644 index 0000000000..0c71e43b3c --- /dev/null +++ b/gdb/testsuite/gdb.perf/skip-prologue.py @@ -0,0 +1,42 @@ +# Copyright (C) 2013 Free Software Foundation, Inc. + +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3 of the License, or +# (at your option) any later version. +# +# This program 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 General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see . + +# This test case is to test the speed of GDB when it is analyzing the +# function prologue. + +from perftest import perftest + +class SkipPrologue(perftest.TestCaseWithBasicMeasurements): + def __init__(self, count): + super(SkipPrologue, self).__init__("skip-prologue") + self.count = count + + def _test(self): + for _ in range(1, self.count): + # Insert breakpoints on function f1 and f2. + bp1 = gdb.Breakpoint("f1") + bp2 = gdb.Breakpoint("f2") + # Remove them. + bp1.delete() + bp2.delete() + + def warm_up(self): + self._test() + + def execute_test(self): + for i in range(1, 4): + gdb.execute("set code-cache off") + gdb.execute("set code-cache on") + self.measure.measure(self._test, i) -- 2.34.1