GDB perf test on backtrace

gdb/testsuite/

2013-11-25  Yao Qi  <yao@codesourcery.com>

	* gdb.perf/backtrace.c: New.
	* gdb.perf/backtrace.exp: New.
	* gdb.perf/backtrace.py: New.

1 files changed, 66 insertions, 0 deletions

diff --git a/gdb/testsuite/gdb.perf/backtrace.exp b/gdb/testsuite/gdb.perf/backtrace.exp
new file mode 100644
index 0000000..53b06dd
--- /dev/null
+++ b/gdb/testsuite/gdb.perf/backtrace.exp
@@ -0,0 +1,66 @@
+# 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 <http://www.gnu.org/licenses/>.
+
+# This test case is to test the performance of GDB doing stack
+# backtrace.
+# There is one parameter in this test:
+#  - BACKTRACE_DEPTH is the number of innermost frames that command
+#    'bt' prints.
+
+load_lib perftest.exp
+
+if [skip_perf_tests] {
+    return 0
+}
+
+standard_testfile .c
+set executable $testfile
+set expfile $testfile.exp
+
+# make check-perf RUNTESTFLAGS='backtrace.exp BACKTRACE_DEPTH=1024'
+if ![info exists BACKTRACE_DEPTH] {
+    set BACKTRACE_DEPTH 64
+}
+
+PerfTest::assemble {
+    global BACKTRACE_DEPTH
+    global srcdir subdir srcfile
+
+    set compile_flags {debug}
+    lappend compile_flags "additional_flags=-DBACKTRACE_DEPTH=${BACKTRACE_DEPTH}"
+
+    if { [gdb_compile "$srcdir/$subdir/$srcfile" ${binfile} executable $compile_flags] != ""} {
+	return -1
+    }
+
+    return 0
+} {
+    global binfile
+
+    clean_restart $binfile
+
+    if ![runto_main] {
+	fail "Can't run to main"
+	return -1
+    }
+
+    gdb_breakpoint "fun2"
+    gdb_continue_to_breakpoint "fun2"
+} {
+    global BACKTRACE_DEPTH
+
+    gdb_test "python BackTrace\($BACKTRACE_DEPTH\).run()"
+
+}