1 files changed, 72 insertions, 0 deletions
diff --git a/packages/Python/lldbsuite/test/benchmarks/expression/TestExpressionCmd.py b/packages/Python/lldbsuite/test/benchmarks/expression/TestExpressionCmd.py
new file mode 100644
index 000000000000..abf45147d636
--- /dev/null
+++ b/packages/Python/lldbsuite/test/benchmarks/expression/TestExpressionCmd.py
@@ -0,0 +1,72 @@
+"""Test lldb's expression evaluations and collect statistics."""
+
+from __future__ import print_function
+
+
+
+import os, sys
+import lldb
+from lldbsuite.test import configuration
+from lldbsuite.test.lldbbench import *
+
+class ExpressionEvaluationCase(BenchBase):
+
+    mydir = TestBase.compute_mydir(__file__)
+
+    def setUp(self):
+        BenchBase.setUp(self)
+        self.source = 'main.cpp'
+        self.line_to_break = line_number(self.source, '// Set breakpoint here.')
+        self.count = 25
+
+    @benchmarks_test
+    @expectedFailureWindows("llvm.org/pr22274: need a pexpect replacement for windows")
+    def test_expr_cmd(self):
+        """Test lldb's expression commands and collect statistics."""
+        self.build()
+        self.exe_name = 'a.out'
+
+        print()
+        self.run_lldb_repeated_exprs(self.exe_name, self.count)
+        print("lldb expr cmd benchmark:", self.stopwatch)
+
+    def run_lldb_repeated_exprs(self, exe_name, count):
+        import pexpect
+        exe = os.path.join(os.getcwd(), exe_name)
+
+        # Set self.child_prompt, which is "(lldb) ".
+        self.child_prompt = '(lldb) '
+        prompt = self.child_prompt
+
+        # Reset the stopwatch now.
+        self.stopwatch.reset()
+        for i in range(count):
+            # 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 -l %d' % (self.source, self.line_to_break))
+            child.expect_exact(prompt)
+            child.sendline('run')
+            child.expect_exact(prompt)
+            expr_cmd1 = 'expr ptr[j]->point.x'
+            expr_cmd2 = 'expr ptr[j]->point.y'
+
+            with self.stopwatch:
+                child.sendline(expr_cmd1)
+                child.expect_exact(prompt)
+                child.sendline(expr_cmd2)
+                child.expect_exact(prompt)
+
+            child.sendline('quit')
+            try:
+                self.child.expect(pexpect.EOF)
+            except:
+                pass
+
+        self.child = None