156 lines
5.1 KiB
Python
156 lines
5.1 KiB
Python
"""Disassemble lldb's Driver::MainLoop() functions comparing lldb against gdb."""
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import os, sys
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import unittest2
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import lldb
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import pexpect
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from lldbbench import *
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def is_exe(fpath):
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"""Returns true if fpath is an executable."""
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return os.path.isfile(fpath) and os.access(fpath, os.X_OK)
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class DisassembleDriverMainLoop(BenchBase):
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mydir = os.path.join("benchmarks", "disassembly")
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def setUp(self):
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"""
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Note that lldbExec can be specified with the LLDB_EXEC env variable (see
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dotest.py), and gdbExec can be specified with the GDB_EXEC env variable.
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This provides a flexibility in specifying different versions of gdb for
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comparison purposes.
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"""
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BenchBase.setUp(self)
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# If env var GDB_EXEC is specified, use it; otherwise, use gdb in your
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# PATH env var.
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if "GDB_EXEC" in os.environ and is_exe(os.environ["GDB_EXEC"]):
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self.gdbExec = os.environ["GDB_EXEC"]
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else:
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self.gdbExec = "gdb"
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self.exe = self.lldbHere
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self.function = 'Driver::MainLoop()'
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self.lldb_avg = None
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self.gdb_avg = None
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self.count = lldb.bmIterationCount
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if self.count <= 0:
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self.count = 5
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@benchmarks_test
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def test_run_lldb_then_gdb(self):
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"""Test disassembly on a large function with lldb vs. gdb."""
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print
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print "lldb path: %s" % self.lldbExec
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print "gdb path: %s" % self.gdbExec
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print
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self.run_lldb_disassembly(self.exe, self.function, self.count)
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print "lldb benchmark:", self.stopwatch
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self.run_gdb_disassembly(self.exe, self.function, self.count)
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print "gdb benchmark:", self.stopwatch
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print "lldb_avg/gdb_avg: %f" % (self.lldb_avg/self.gdb_avg)
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@benchmarks_test
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def test_run_gdb_then_lldb(self):
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"""Test disassembly on a large function with lldb vs. gdb."""
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print
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print "lldb path: %s" % self.lldbExec
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print "gdb path: %s" % self.gdbExec
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print
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self.run_gdb_disassembly(self.exe, self.function, self.count)
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print "gdb benchmark:", self.stopwatch
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self.run_lldb_disassembly(self.exe, self.function, self.count)
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print "lldb benchmark:", self.stopwatch
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print "lldb_avg/gdb_avg: %f" % (self.lldb_avg/self.gdb_avg)
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def run_lldb_disassembly(self, exe, function, count):
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# Set self.child_prompt, which is "(lldb) ".
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self.child_prompt = '(lldb) '
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prompt = self.child_prompt
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# So that the child gets torn down after the test.
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self.child = pexpect.spawn('%s %s %s' % (self.lldbExec, self.lldbOption, exe))
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child = self.child
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# Turn on logging for what the child sends back.
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if self.TraceOn():
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child.logfile_read = sys.stdout
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child.expect_exact(prompt)
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child.sendline('breakpoint set -F %s' % function)
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child.expect_exact(prompt)
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child.sendline('run')
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child.expect_exact(prompt)
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# Reset the stopwatch now.
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self.stopwatch.reset()
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for i in range(count):
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with self.stopwatch:
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# Disassemble the function.
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child.sendline('disassemble -f')
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child.expect_exact(prompt)
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child.sendline('next')
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child.expect_exact(prompt)
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child.sendline('quit')
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try:
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self.child.expect(pexpect.EOF)
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except:
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pass
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self.lldb_avg = self.stopwatch.avg()
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if self.TraceOn():
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print "lldb disassembly benchmark:", str(self.stopwatch)
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self.child = None
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def run_gdb_disassembly(self, exe, function, count):
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# Set self.child_prompt, which is "(gdb) ".
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self.child_prompt = '(gdb) '
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prompt = self.child_prompt
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# So that the child gets torn down after the test.
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self.child = pexpect.spawn('%s --nx %s' % (self.gdbExec, exe))
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child = self.child
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# Turn on logging for what the child sends back.
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if self.TraceOn():
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child.logfile_read = sys.stdout
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child.expect_exact(prompt)
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child.sendline('break %s' % function)
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child.expect_exact(prompt)
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child.sendline('run')
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child.expect_exact(prompt)
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# Reset the stopwatch now.
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self.stopwatch.reset()
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for i in range(count):
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with self.stopwatch:
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# Disassemble the function.
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child.sendline('disassemble')
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child.expect_exact(prompt)
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child.sendline('next')
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child.expect_exact(prompt)
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child.sendline('quit')
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child.expect_exact('The program is running. Exit anyway?')
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child.sendline('y')
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try:
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self.child.expect(pexpect.EOF)
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except:
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pass
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self.gdb_avg = self.stopwatch.avg()
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if self.TraceOn():
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print "gdb disassembly benchmark:", str(self.stopwatch)
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self.child = None
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if __name__ == '__main__':
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import atexit
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lldb.SBDebugger.Initialize()
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atexit.register(lambda: lldb.SBDebugger.Terminate())
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unittest2.main()
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