[RFC 3/3] Test on solib load and unload

[Yao Qi <yao at codesourcery dot com>]

This patch is to add a test case to on the performance of GDB handling
load and unload of shared library.

gdb/testsuite/

	* gdb.perf/solib.c: New.
	* gdb.perf/solib.exp: New.
	* gdb.perf/solib.py: New.
---
 gdb/testsuite/gdb.perf/solib.c   |   79 ++++++++++++++++++++++++++++++++++
 gdb/testsuite/gdb.perf/solib.exp |   86 ++++++++++++++++++++++++++++++++++++++
 gdb/testsuite/gdb.perf/solib.py  |   48 +++++++++++++++++++++
 3 files changed, 213 insertions(+), 0 deletions(-)
 create mode 100644 gdb/testsuite/gdb.perf/solib.c
 create mode 100644 gdb/testsuite/gdb.perf/solib.exp
 create mode 100644 gdb/testsuite/gdb.perf/solib.py

diff --git a/gdb/testsuite/gdb.perf/solib.c b/gdb/testsuite/gdb.perf/solib.c
new file mode 100644
index 0000000..948b286
--- /dev/null
+++ b/gdb/testsuite/gdb.perf/solib.c
@@ -0,0 +1,79 @@
+/* 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 <http://www.gnu.org/licenses/>.  */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#ifdef __WIN32__
+#include <windows.h>
+#define dlopen(name, mode) LoadLibrary (TEXT (name))
+#ifdef _WIN32_WCE
+# define dlsym(handle, func) GetProcAddress (handle, TEXT (func))
+#else
+# define dlsym(handle, func) GetProcAddress (handle, func)
+#endif
+#define dlclose(handle) FreeLibrary (handle)
+#else
+#include <dlfcn.h>
+#endif
+
+void
+do_test (int number)
+{
+  void **handles;
+  char libname[40];
+  int i;
+
+  handles = malloc (sizeof (void *) * number);
+
+  for (i = 0; i < number; i++)
+    {
+      sprintf (libname, "solib-lib%d", i);
+      handles[i] = dlopen (libname, RTLD_LAZY);
+      if (handles[i] == NULL)
+	{
+	  printf ("ERROR on dlopen %s\n", libname);
+	  return;
+	}
+    }
+
+  for (i = 0; i < number; i++)
+    {
+      char funname[20];
+      void *p;
+
+      sprintf (funname, "shr%d", i);
+      p = dlsym (handles[i], funname);
+    }
+
+  for (i = 0; i < number; i++)
+    dlclose (handles[i]);
+
+  free (handles);
+}
+
+static void
+end (void)
+{}
+
+int
+main (void)
+{
+  end ();
+
+  return 0;
+}
diff --git a/gdb/testsuite/gdb.perf/solib.exp b/gdb/testsuite/gdb.perf/solib.exp
new file mode 100644
index 0000000..8b50968
--- /dev/null
+++ b/gdb/testsuite/gdb.perf/solib.exp
@@ -0,0 +1,86 @@
+# 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 speed of GDB when it is handling the
+# shared libraries of inferior are loaded and unloaded.
+
+standard_testfile .c
+set executable $testfile
+set expfile $testfile.exp
+
+# make check RUNTESTFLAGS='solib.exp SOLIB_NUMBER=1024'
+if ![info exists SOLIB_NUMBER] {
+    set SOLIB_NUMBER 128
+}
+
+for {set i 0} {$i < $SOLIB_NUMBER} {incr i} {
+
+    # Produce source files.
+    set libname "solib-lib$i"
+    set src [standard_temp_file $libname.c]
+    set exe [standard_temp_file $libname]
+
+    set code "int shr$i (void) {return $i;}"
+    set f [open $src "w"]
+    puts $f $code
+    close $f
+
+    # Compile.
+    if { [gdb_compile_shlib $src $exe {debug}] != "" } {
+	untested "Couldn't compile $src."
+	return -1
+    }
+
+    # Delete object files to save some space.
+    file delete [standard_temp_file  "solib-lib$i.c.o"]
+}
+
+if { [prepare_for_testing ${testfile}.exp ${binfile} ${srcfile} {debug shlib_load} ] } {
+     return -1
+}
+
+clean_restart $binfile
+
+if ![runto_main] {
+    fail "Can't run to main"
+    return -1
+}
+
+set remote_python_file [gdb_remote_download host ${srcdir}/${subdir}/${testfile}.py]
+
+# Set sys.path for module perftest.
+gdb_test_no_output "python import os, sys"
+gdb_test_no_output "python sys.path.insert\(0, os.path.abspath\(\"${srcdir}/${subdir}/lib\"\)\)"
+
+gdb_test_no_output "python exec (open ('${remote_python_file}').read ())"
+
+gdb_test_no_output "python SolibLoadUnload\($SOLIB_NUMBER\)"
+
+# Call the convenience function registered by python script.
+send_gdb "call \$perftest()\n"
+gdb_expect 3000 {
+    -re "\"Done\".*${gdb_prompt} $" {
+    }
+    timeout {}
+}
+
+remote_file host delete ${remote_python_file}
+
+# Remove these libraries and source files.
+
+for {set i 0} {$i < $SOLIB_NUMBER} {incr i} {
+    file delete "solib-lib$i"
+    file delete "solib-lib$i.c"
+}
diff --git a/gdb/testsuite/gdb.perf/solib.py b/gdb/testsuite/gdb.perf/solib.py
new file mode 100644
index 0000000..7cc9c4a
--- /dev/null
+++ b/gdb/testsuite/gdb.perf/solib.py
@@ -0,0 +1,48 @@
+# 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 speed of GDB when it is handling the
+# shared libraries of inferior are loaded and unloaded.
+
+import gdb
+import time
+
+from perftest import perftest
+
+class SolibLoadUnload(perftest.SingleVariableTestCase):
+    def __init__(self, solib_number):
+        super (SolibLoadUnload, self).__init__ ("solib")
+        self.solib_number = solib_number
+
+    def execute_test(self):
+        num = self.solib_number
+        iteration = 5;
+
+        # Warm up.
+        do_test_command = "call do_test (%d)" % num
+        gdb.execute (do_test_command)
+        gdb.execute (do_test_command)
+
+        while num > 0 and iteration > 0:
+            do_test_command = "call do_test (%d)" % num
+
+            start_time = time.clock()
+            gdb.execute (do_test_command)
+            elapsed_time = time.clock() - start_time
+
+            self.result.record (num, elapsed_time)
+
+            num = num / 2
+            iteration -= 1
-- 
1.7.7.6