TestFunctionStarts.py
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"""
Test that we read the function starts section.
"""
import lldb
from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
from lldbsuite.test import lldbutil
exe_name = "StripMe" # Must match Makefile
class FunctionStartsTestCase(TestBase):
mydir = TestBase.compute_mydir(__file__)
NO_DEBUG_INFO_TESTCASE = True
@skipIfRemote
@skipUnlessDarwin
def test_function_starts_binary(self):
"""Test that we make synthetic symbols when we have the binary."""
self.build()
self.do_function_starts(False)
@skipIfRemote
@skipUnlessDarwin
def test_function_starts_no_binary(self):
"""Test that we make synthetic symbols when we don't have the binary"""
self.build()
self.do_function_starts(True)
def do_function_starts(self, in_memory):
"""Run the binary, stop at our unstripped function,
make sure the caller has synthetic symbols"""
exe = self.getBuildArtifact(exe_name)
# Now strip the binary, but leave externals so we can break on dont_strip_me.
try:
fail_str = system([["strip", "-u", "-x", "-S", exe]])
except CalledProcessError as cmd_error:
self.fail("Strip failed: %d"%(cmd_error.returncode))
# Use a file as a synchronization point between test and inferior.
pid_file_path = lldbutil.append_to_process_working_directory(self,
"token_pid_%d" % (int(os.getpid())))
self.addTearDownHook(
lambda: self.run_platform_command(
"rm %s" %
(pid_file_path)))
popen = self.spawnSubprocess(exe, [pid_file_path])
self.addTearDownHook(self.cleanupSubprocesses)
# Wait until process has fully started up.
pid = lldbutil.wait_for_file_on_target(self, pid_file_path)
if in_memory:
remove_file(exe)
target = self.dbg.CreateTarget(None)
self.assertTrue(target.IsValid(), "Got a vaid empty target.")
error = lldb.SBError()
attach_info = lldb.SBAttachInfo()
attach_info.SetProcessID(popen.pid)
attach_info.SetIgnoreExisting(False)
process = target.Attach(attach_info, error)
self.assertTrue(error.Success(), "Didn't attach successfully to %d: %s"%(popen.pid, error.GetCString()))
bkpt = target.BreakpointCreateByName("dont_strip_me", exe)
self.assertTrue(bkpt.GetNumLocations() > 0, "Didn't set the dont_strip_me bkpt.")
threads = lldbutil.continue_to_breakpoint(process, bkpt)
self.assertEqual(len(threads), 1, "Didn't hit my breakpoint.")
# Our caller frame should have been stripped. Make sure we made a synthetic symbol
# for it:
thread = threads[0]
self.assertTrue(thread.num_frames > 1, "Couldn't backtrace.")
name = thread.frame[1].GetFunctionName()
self.assertTrue(name.startswith("___lldb_unnamed_symbol"))
self.assertTrue(name.endswith("$$StripMe"))