vendor/lldb/lldb-trunk-r256945

1 files changed, 119 insertions, 0 deletions

diff --git a/packages/Python/lldbsuite/test/benchmarks/turnaround/TestCompileRunToBreakpointTurnaround.py b/packages/Python/lldbsuite/test/benchmarks/turnaround/TestCompileRunToBreakpointTurnaround.py
new file mode 100644
index 0000000000000..731eb13bbcfb2
--- /dev/null
+++ b/packages/Python/lldbsuite/test/benchmarks/turnaround/TestCompileRunToBreakpointTurnaround.py
@@ -0,0 +1,119 @@
+"""Benchmark the turnaround time starting a debugger and run to the breakpont with lldb vs. gdb."""
+
+from __future__ import print_function
+
+
+
+import os, sys
+import lldb
+from lldbsuite.test import configuration
+from lldbsuite.test.lldbbench import *
+
+class CompileRunToBreakpointBench(BenchBase):
+
+    mydir = TestBase.compute_mydir(__file__)
+
+    def setUp(self):
+        BenchBase.setUp(self)
+        self.exe = lldbtest_config.lldbExec
+        self.function = 'Driver::MainLoop()'
+        self.count = 3
+
+        self.lldb_avg = None
+        self.gdb_avg = None
+
+    @benchmarks_test
+    @no_debug_info_test
+    @expectedFailureWindows("llvm.org/pr22274: need a pexpect replacement for windows")
+    def test_run_lldb_then_gdb(self):
+        """Benchmark turnaround time with lldb vs. gdb."""
+        print()
+        self.run_lldb_turnaround(self.exe, self.function, self.count)
+        print("lldb turnaround benchmark:", self.stopwatch)
+        self.run_gdb_turnaround(self.exe, self.function, self.count)
+        print("gdb turnaround benchmark:", self.stopwatch)
+        print("lldb_avg/gdb_avg: %f" % (self.lldb_avg/self.gdb_avg))
+
+    def run_lldb_turnaround(self, exe, function, count):
+        import pexpect
+        def run_one_round():
+            prompt = self.child_prompt
+
+            # So that the child gets torn down after the test.
+            self.child = pexpect.spawn('%s %s %s' % (lldbtest_config.lldbExec, self.lldbOption, exe))
+            child = self.child
+
+            # Turn on logging for what the child sends back.
+            if self.TraceOn():
+                child.logfile_read = sys.stdout
+
+            child.expect_exact(prompt)
+            child.sendline('breakpoint set -F %s' % function)
+            child.expect_exact(prompt)
+            child.sendline('run')
+            child.expect_exact(prompt)
+
+        # Set self.child_prompt, which is "(lldb) ".
+        self.child_prompt = '(lldb) '
+        # Reset the stopwatch now.
+        self.stopwatch.reset()
+
+        for i in range(count + 1):
+            # Ignore the first invoke lldb and run to the breakpoint turnaround time.
+            if i == 0:
+                run_one_round()
+            else:
+                with self.stopwatch:
+                    run_one_round()
+
+            self.child.sendline('quit')
+            try:
+                self.child.expect(pexpect.EOF)
+            except:
+                pass
+
+        self.lldb_avg = self.stopwatch.avg()
+        self.child = None
+
+    def run_gdb_turnaround(self, exe, function, count):
+        import pexpect
+        def run_one_round():
+            prompt = self.child_prompt
+
+            # So that the child gets torn down after the test.
+            self.child = pexpect.spawn('gdb --nx %s' % exe)
+            child = self.child
+
+            # Turn on logging for what the child sends back.
+            if self.TraceOn():
+                child.logfile_read = sys.stdout
+
+            child.expect_exact(prompt)
+            child.sendline('break %s' % function)
+            child.expect_exact(prompt)
+            child.sendline('run')
+            child.expect_exact(prompt)
+
+        # Set self.child_prompt, which is "(gdb) ".
+        self.child_prompt = '(gdb) '
+        # Reset the stopwatch now.
+        self.stopwatch.reset()
+
+        for i in range(count+1):
+            # Ignore the first invoke lldb and run to the breakpoint turnaround time.
+            if i == 0:
+                run_one_round()
+            else:
+                with self.stopwatch:
+                    run_one_round()
+
+            self.child.sendline('quit')
+            self.child.expect_exact('The program is running.  Exit anyway?')
+            self.child.sendline('y')
+            try:
+                self.child.expect(pexpect.EOF)
+            except:
+                pass
+
+        self.gdb_avg = self.stopwatch.avg()
+        self.child = None