[Lldb-commits] [lldb] r141740 - /lldb/trunk/test/benchmarks/stepping/TestRunHooksThenSteppings.py

[Johnny Chen]

Author: johnny
Date: Tue Oct 11 18:22:02 2011
New Revision: 141740

URL: http://llvm.org/viewvc/llvm-project?rev=141740&view=rev
Log:
Add a more generic stepping benchmark, which uses the '-k' option of the test driver
to be able to specify the runhook(s) to bring the debug session to a certain state
before running the benchmarking logic.  An example,

./dotest.py -v -t +b -k 'process attach -n Mail' -k 'thread backtrace all' -p TestRunHooksThenSteppings.py

spawns lldb, attaches to the 'Mail' application, does a backtrace for all threads, and then
runs the benchmark to step the inferior multiple times.

Added:
    lldb/trunk/test/benchmarks/stepping/TestRunHooksThenSteppings.py

Added: lldb/trunk/test/benchmarks/stepping/TestRunHooksThenSteppings.py
URL: http://llvm.org/viewvc/llvm-project/lldb/trunk/test/benchmarks/stepping/TestRunHooksThenSteppings.py?rev=141740&view=auto
==============================================================================
--- lldb/trunk/test/benchmarks/stepping/TestRunHooksThenSteppings.py (added)
+++ lldb/trunk/test/benchmarks/stepping/TestRunHooksThenSteppings.py Tue Oct 11 18:22:02 2011
@@ -0,0 +1,71 @@
+"""Test lldb's stepping speed."""
+
+import os, sys
+import unittest2
+import lldb
+import pexpect
+from lldbbench import *
+
+class RunHooksThenSteppingsBench(BenchBase):
+
+    mydir = os.path.join("benchmarks", "stepping")
+
+    def setUp(self):
+        BenchBase.setUp(self)
+        self.stepping_avg = None
+
+    @benchmarks_test
+    def test_lldb_runhooks_then_steppings(self):
+        """Test lldb steppings on a large executable."""
+        print
+        self.run_lldb_runhooks_then_steppings(50)
+        print "lldb stepping benchmark:", self.stopwatch
+
+    def run_lldb_runhooks_then_steppings(self, count):
+        # Set self.child_prompt, which is "(lldb) ".
+        self.child_prompt = '(lldb) '
+        prompt = self.child_prompt
+
+        self.child = pexpect.spawn('%s %s' % (self.lldbHere, self.lldbOption))
+        self.child.expect_exact(prompt)
+        # So that the child gets torn down after the test.
+        child = self.child
+
+        # Turn on logging for what the child sends back.
+        if self.TraceOn():
+            child.logfile_read = sys.stdout
+
+        #lldb.runHooks = ['process attach -n Mail']
+
+        # Perform the run hooks to bring lldb debugger to the desired state.
+        if not lldb.runHooks:
+            self.skipTest("No runhooks specified for lldb, skip the test")
+        for hook in lldb.runHooks:
+            child.sendline(hook)
+            child.expect_exact(prompt)
+
+        # Reset the stopwatch now.
+        self.stopwatch.reset()
+        for i in range(count):
+            with self.stopwatch:
+                # Disassemble the function.
+                child.sendline('next') # Aka 'thread step-over'.
+                child.expect_exact(prompt)
+
+        child.sendline('quit')
+        try:
+            self.child.expect(pexpect.EOF)
+        except:
+            pass
+
+        self.stepping_avg = self.stopwatch.avg()
+        if self.TraceOn():
+            print "lldb stepping benchmark:", str(self.stopwatch)
+        self.child = None
+
+
+if __name__ == '__main__':
+    import atexit
+    lldb.SBDebugger.Initialize()
+    atexit.register(lambda: lldb.SBDebugger.Terminate())
+    unittest2.main()