Vendor import of lldb trunk r256945:

https://llvm.org/svn/llvm-project/lldb/trunk@256945

3 files changed, 316 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 0000000..a18cb2a
--- /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
diff --git a/packages/Python/lldbsuite/test/benchmarks/disassembly/TestDoAttachThenDisassembly.py b/packages/Python/lldbsuite/test/benchmarks/disassembly/TestDoAttachThenDisassembly.py
new file mode 100644
index 0000000..b7b0709
--- /dev/null
+++ b/packages/Python/lldbsuite/test/benchmarks/disassembly/TestDoAttachThenDisassembly.py
@@ -0,0 +1,67 @@
+"""Test lldb's disassemblt speed.  This bench deliberately attaches to an lldb
+inferior and traverses the stack for thread0 to arrive at frame with function
+'MainLoop'.  It is important to specify an lldb executable as the inferior."""
+
+from __future__ import print_function
+
+
+
+import os, sys
+import lldb
+from lldbsuite.test.lldbbench import *
+from lldbsuite.test import configuration
+
+class AttachThenDisassemblyBench(BenchBase):
+
+    mydir = TestBase.compute_mydir(__file__)
+
+    def setUp(self):
+        BenchBase.setUp(self)
+        self.exe = lldbtest_config.lldbExec
+        self.count = 10
+
+    @benchmarks_test
+    @no_debug_info_test
+    def test_attach_then_disassembly(self):
+        """Attach to a spawned lldb process then run disassembly benchmarks."""
+        print()
+        self.run_lldb_attach_then_disassembly(self.exe, self.count)
+        print("lldb disassembly benchmark:", self.stopwatch)
+
+    def run_lldb_attach_then_disassembly(self, exe, count):
+        target = self.dbg.CreateTarget(exe)
+
+        # Spawn a new process and don't display the stdout if not in TraceOn() mode.
+        import subprocess
+        popen = subprocess.Popen([exe, self.lldbOption],
+                                 stdout = open(os.devnull, 'w') if not self.TraceOn() else None)
+        if self.TraceOn():
+            print("pid of spawned process: %d" % popen.pid)
+
+        # Attach to the launched lldb process.
+        listener = lldb.SBListener("my.attach.listener")
+        error = lldb.SBError()
+        process = target.AttachToProcessWithID(listener, popen.pid, error)
+
+        # Set thread0 as the selected thread, followed by the 'MainLoop' frame
+        # as the selected frame.  Then do disassembly on the function.
+        thread0 = process.GetThreadAtIndex(0)
+        process.SetSelectedThread(thread0)
+        i = 0
+        found = False
+        for f in thread0:
+            #print("frame#%d %s" % (i, f.GetFunctionName()))
+            if "MainLoop" in f.GetFunctionName():
+                found = True
+                thread0.SetSelectedFrame(i)
+                if self.TraceOn():
+                    print("Found frame#%d for function 'MainLoop'" % i)
+                break
+            i += 1
+            
+        # Reset the stopwatch now.
+        self.stopwatch.reset()
+        for i in range(count):
+            with self.stopwatch:
+                # Disassemble the function.
+                self.runCmd("disassemble -f")
diff --git a/packages/Python/lldbsuite/test/benchmarks/disassembly/TestXcode41Vs42GDBDisassembly.py b/packages/Python/lldbsuite/test/benchmarks/disassembly/TestXcode41Vs42GDBDisassembly.py
new file mode 100644
index 0000000..745e7b6
--- /dev/null
+++ b/packages/Python/lldbsuite/test/benchmarks/disassembly/TestXcode41Vs42GDBDisassembly.py
@@ -0,0 +1,94 @@
+"""Disassemble lldb's Driver::MainLoop() functions comparing Xcode 4.1 vs. 4.2's gdb."""
+
+from __future__ import print_function
+
+
+
+import os, sys
+import lldb
+from lldbsuite.test import configuration
+from lldbsuite.test.lldbbench import *
+
+class XCode41Vs42GDBDisassembly(BenchBase):
+
+    mydir = TestBase.compute_mydir(__file__)
+
+    def setUp(self):
+        BenchBase.setUp(self)
+        self.gdb_41_exe = '/Xcode41/usr/bin/gdb'
+        self.gdb_42_exe = '/Developer/usr/bin/gdb'
+        self.exe = lldbtest_config.lldbExec
+        self.function = 'Driver::MainLoop()'
+        self.gdb_41_avg = None
+        self.gdb_42_avg = None
+        self.count = 5
+
+    @benchmarks_test
+    @no_debug_info_test
+    @expectedFailureWindows("llvm.org/pr22274: need a pexpect replacement for windows")
+    def test_run_41_then_42(self):
+        """Test disassembly on a large function with 4.1 vs. 4.2's gdb."""
+        print()
+        self.run_gdb_disassembly(self.gdb_41_exe, self.exe, self.function, self.count)
+        print("4.1 gdb benchmark:", self.stopwatch)
+        self.gdb_41_avg = self.stopwatch.avg()
+        self.run_gdb_disassembly(self.gdb_42_exe, self.exe, self.function, self.count)
+        print("4.2 gdb benchmark:", self.stopwatch)
+        self.gdb_42_avg = self.stopwatch.avg()
+        print("gdb_42_avg/gdb_41_avg: %f" % (self.gdb_42_avg/self.gdb_41_avg))
+
+    @benchmarks_test
+    @no_debug_info_test
+    @expectedFailureWindows("llvm.org/pr22274: need a pexpect replacement for windows")
+    def test_run_42_then_41(self):
+        """Test disassembly on a large function with 4.1 vs. 4.2's gdb."""
+        print()
+        self.run_gdb_disassembly(self.gdb_42_exe, self.exe, self.function, self.count)
+        print("4.2 gdb benchmark:", self.stopwatch)
+        self.gdb_42_avg = self.stopwatch.avg()
+        self.run_gdb_disassembly(self.gdb_41_exe, self.exe, self.function, self.count)
+        print("4.1 gdb benchmark:", self.stopwatch)
+        self.gdb_41_avg = self.stopwatch.avg()
+        print("gdb_42_avg/gdb_41_avg: %f" % (self.gdb_42_avg/self.gdb_41_avg))
+
+    def run_gdb_disassembly(self, gdb_exe_path, 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' % (gdb_exe_path, 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
+
+        if self.TraceOn():
+            print("gdb disassembly benchmark:", str(self.stopwatch))
+        self.child = None