vendor/lldb/lldb-trunk-r256945

1 files changed, 155 insertions, 0 deletions

diff --git a/packages/Python/lldbsuite/test/benchmarks/disassembly/TestDisassembly.py b/packages/Python/lldbsuite/test/benchmarks/disassembly/TestDisassembly.py
new file mode 100644
index 0000000000000..a18cb2a64c767
--- /dev/null
+++ b/packages/Python/lldbsuite/test/benchmarks/disassembly/TestDisassembly.py
@@ -0,0 +1,155 @@
+"""Disassemble lldb's Driver::MainLoop() functions comparing lldb against gdb."""
+
+from __future__ import print_function
+
+
+
+import os, sys
+import lldb
+from lldbsuite.test import configuration
+from lldbsuite.test.lldbbench import *
+
+def is_exe(fpath):
+    """Returns true if fpath is an executable."""
+    return os.path.isfile(fpath) and os.access(fpath, os.X_OK)
+
+class DisassembleDriverMainLoop(BenchBase):
+
+    mydir = TestBase.compute_mydir(__file__)
+
+    def setUp(self):
+        """
+        Note that lldbtest_config.lldbExec can be specified with the LLDB_EXEC env variable (see
+        dotest.py), and gdbExec can be specified with the GDB_EXEC env variable.
+        This provides a flexibility in specifying different versions of gdb for
+        comparison purposes.
+        """
+        BenchBase.setUp(self)
+        # If env var GDB_EXEC is specified, use it; otherwise, use gdb in your
+        # PATH env var.
+        if "GDB_EXEC" in os.environ and is_exe(os.environ["GDB_EXEC"]):
+            self.gdbExec = os.environ["GDB_EXEC"]
+        else:
+            self.gdbExec = "gdb"
+
+        self.exe = lldbtest_config.lldbExec
+        self.function = 'Driver::MainLoop()'
+        self.lldb_avg = None
+        self.gdb_avg = None
+        self.count = 5
+
+    @benchmarks_test
+    @no_debug_info_test
+    @expectedFailureWindows("llvm.org/pr22274: need a pexpect replacement for windows")
+    def test_run_lldb_then_gdb(self):
+        """Test disassembly on a large function with lldb vs. gdb."""
+        print()
+        print("lldb path: %s" % lldbtest_config.lldbExec)
+        print("gdb path: %s" % self.gdbExec)
+
+        print()
+        self.run_lldb_disassembly(self.exe, self.function, self.count)
+        print("lldb benchmark:", self.stopwatch)
+        self.run_gdb_disassembly(self.exe, self.function, self.count)
+        print("gdb benchmark:", self.stopwatch)
+        print("lldb_avg/gdb_avg: %f" % (self.lldb_avg/self.gdb_avg))
+
+    @benchmarks_test
+    @no_debug_info_test
+    @expectedFailureWindows("llvm.org/pr22274: need a pexpect replacement for windows")
+    def test_run_gdb_then_lldb(self):
+        """Test disassembly on a large function with lldb vs. gdb."""
+        print()
+        print("lldb path: %s" % lldbtest_config.lldbExec)
+        print("gdb path: %s" % self.gdbExec)
+
+        print()
+        self.run_gdb_disassembly(self.exe, self.function, self.count)
+        print("gdb benchmark:", self.stopwatch)
+        self.run_lldb_disassembly(self.exe, self.function, self.count)
+        print("lldb benchmark:", self.stopwatch)
+        print("lldb_avg/gdb_avg: %f" % (self.lldb_avg/self.gdb_avg))
+
+    def run_lldb_disassembly(self, exe, function, count):
+        import pexpect
+        # Set self.child_prompt, which is "(lldb) ".
+        self.child_prompt = '(lldb) '
+        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)
+
+        # Reset the stopwatch now.
+        self.stopwatch.reset()
+        for i in range(count):
+            with self.stopwatch:
+                # Disassemble the function.
+                child.sendline('disassemble -f')
+                child.expect_exact(prompt)
+            child.sendline('next')
+            child.expect_exact(prompt)
+
+        child.sendline('quit')
+        try:
+            self.child.expect(pexpect.EOF)
+        except:
+            pass
+
+        self.lldb_avg = self.stopwatch.avg()
+        if self.TraceOn():
+            print("lldb disassembly benchmark:", str(self.stopwatch))
+        self.child = None
+
+    def run_gdb_disassembly(self, exe, function, count):
+        import pexpect
+        # Set self.child_prompt, which is "(gdb) ".
+        self.child_prompt = '(gdb) '
+        prompt = self.child_prompt
+
+        # So that the child gets torn down after the test.
+        self.child = pexpect.spawn('%s --nx %s' % (self.gdbExec, 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)
+
+        # Reset the stopwatch now.
+        self.stopwatch.reset()
+        for i in range(count):
+            with self.stopwatch:
+                # Disassemble the function.
+                child.sendline('disassemble')
+                child.expect_exact(prompt)
+            child.sendline('next')
+            child.expect_exact(prompt)
+
+        child.sendline('quit')
+        child.expect_exact('The program is running.  Exit anyway?')
+        child.sendline('y')
+        try:
+            self.child.expect(pexpect.EOF)
+        except:
+            pass
+
+        self.gdb_avg = self.stopwatch.avg()
+        if self.TraceOn():
+            print("gdb disassembly benchmark:", str(self.stopwatch))
+        self.child = None