forked from OSchip/llvm-project
124 lines
3.8 KiB
Python
124 lines
3.8 KiB
Python
"""Benchmark the turnaround time starting a debugger and run to the breakpont with lldb vs. gdb."""
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import os, sys
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import unittest2
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import lldb
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from lldbbench import *
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class CompileRunToBreakpointBench(BenchBase):
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mydir = TestBase.compute_mydir(__file__)
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def setUp(self):
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BenchBase.setUp(self)
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self.exe = self.lldbHere
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self.function = 'Driver::MainLoop()'
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self.count = lldb.bmIterationCount
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if self.count <= 0:
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self.count = 3
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self.lldb_avg = None
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self.gdb_avg = None
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@benchmarks_test
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def test_run_lldb_then_gdb(self):
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"""Benchmark turnaround time with lldb vs. gdb."""
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print
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self.run_lldb_turnaround(self.exe, self.function, self.count)
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print "lldb turnaround benchmark:", self.stopwatch
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self.run_gdb_turnaround(self.exe, self.function, self.count)
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print "gdb turnaround 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_turnaround(self, exe, function, count):
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import pexpect
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def run_one_round():
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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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# Set self.child_prompt, which is "(lldb) ".
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self.child_prompt = '(lldb) '
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# Reset the stopwatch now.
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self.stopwatch.reset()
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for i in range(count + 1):
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# Ignore the first invoke lldb and run to the breakpoint turnaround time.
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if i == 0:
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run_one_round()
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else:
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with self.stopwatch:
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run_one_round()
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self.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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self.child = None
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def run_gdb_turnaround(self, exe, function, count):
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import pexpect
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def run_one_round():
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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('gdb --nx %s' % 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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# Set self.child_prompt, which is "(gdb) ".
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self.child_prompt = '(gdb) '
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# Reset the stopwatch now.
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self.stopwatch.reset()
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for i in range(count+1):
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# Ignore the first invoke lldb and run to the breakpoint turnaround time.
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if i == 0:
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run_one_round()
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else:
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with self.stopwatch:
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run_one_round()
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self.child.sendline('quit')
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self.child.expect_exact('The program is running. Exit anyway?')
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self.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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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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