llvm-project/lldb/test/benchmarks/disassembly/TestDoAttachThenDisassembly.py

75 lines
2.6 KiB
Python
Raw Normal View History

"""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."""
import os, sys
import unittest2
import lldb
from lldbbench import *
class AttachThenDisassemblyBench(BenchBase):
mydir = TestBase.compute_mydir(__file__)
def setUp(self):
BenchBase.setUp(self)
if lldb.bmExecutable:
self.exe = lldb.bmExecutable
else:
self.exe = lldbtest_config.lldbExec
self.count = lldb.bmIterationCount
if self.count <= 0:
self.count = 10
@benchmarks_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")
if __name__ == '__main__':
import atexit
lldb.SBDebugger.Initialize()
atexit.register(lambda: lldb.SBDebugger.Terminate())
unittest2.main()