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https://github.com/Gericom/teak-llvm.git
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19474e1801
This module was originally intended to be imported by top-level scripts to be able to find the LLDB packages and third party libraries. Packages themselves shouldn't need to import it, because by the time it gets into the package, the top-level script should have already done this. Indeed, it was just adding the same values to sys.path multiple times, so this patch is essentially no functional change. To make sure it doesn't get re-introduced, we also delete the `use_lldb_suite` module from `lldbsuite/test`, although the original copy still remains in `lldb/test` llvm-svn: 251963
140 lines
6.2 KiB
Python
140 lines
6.2 KiB
Python
"""
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Test calling a function that hits a signal set to auto-restart, make sure the call completes.
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"""
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from __future__ import print_function
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import lldb
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import lldbsuite.test.lldbutil as lldbutil
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from lldbsuite.test.lldbtest import *
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class ExprCommandThatRestartsTestCase(TestBase):
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mydir = TestBase.compute_mydir(__file__)
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def setUp(self):
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# Call super's setUp().
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TestBase.setUp(self)
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self.main_source = "lotta-signals.c"
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self.main_source_spec = lldb.SBFileSpec (self.main_source)
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@skipIfFreeBSD # llvm.org/pr19246: intermittent failure
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@skipIfDarwin # llvm.org/pr19246: intermittent failure
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@skipIfWindows # Test relies on signals, unsupported on Windows
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def test(self):
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"""Test calling function that hits a signal and restarts."""
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self.build()
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self.call_function()
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def check_after_call (self, num_sigchld):
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after_call = self.sigchld_no.GetValueAsSigned(-1)
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self.assertTrue (after_call - self.start_sigchld_no == num_sigchld, "Really got %d SIGCHLD signals through the call."%(num_sigchld))
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self.start_sigchld_no = after_call
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# Check that we are back where we were before:
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frame = self.thread.GetFrameAtIndex(0)
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self.assertTrue (self.orig_frame_pc == frame.GetPC(), "Restored the zeroth frame correctly")
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def call_function(self):
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exe_name = "a.out"
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exe = os.path.join(os.getcwd(), exe_name)
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target = self.dbg.CreateTarget(exe)
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self.assertTrue(target, VALID_TARGET)
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empty = lldb.SBFileSpec()
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breakpoint = target.BreakpointCreateBySourceRegex('Stop here in main.',self.main_source_spec)
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self.assertTrue(breakpoint.GetNumLocations() > 0, VALID_BREAKPOINT)
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# Launch the process, and do not stop at the entry point.
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process = target.LaunchSimple (None, None, self.get_process_working_directory())
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self.assertTrue(process, PROCESS_IS_VALID)
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# Frame #0 should be at our breakpoint.
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threads = lldbutil.get_threads_stopped_at_breakpoint (process, breakpoint)
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self.assertTrue(len(threads) == 1)
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self.thread = threads[0]
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# Make sure the SIGCHLD behavior is pass/no-stop/no-notify:
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return_obj = lldb.SBCommandReturnObject()
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self.dbg.GetCommandInterpreter().HandleCommand("process handle SIGCHLD -s 0 -p 1 -n 0", return_obj)
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self.assertTrue (return_obj.Succeeded() == True, "Set SIGCHLD to pass, no-stop")
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# The sigchld_no variable should be 0 at this point.
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self.sigchld_no = target.FindFirstGlobalVariable("sigchld_no")
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self.assertTrue (self.sigchld_no.IsValid(), "Got a value for sigchld_no")
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self.start_sigchld_no = self.sigchld_no.GetValueAsSigned (-1)
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self.assertTrue (self.start_sigchld_no != -1, "Got an actual value for sigchld_no")
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options = lldb.SBExpressionOptions()
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# processing 30 signals takes a while, increase the expression timeout a bit
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options.SetTimeoutInMicroSeconds(3000000) # 3s
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options.SetUnwindOnError(True)
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frame = self.thread.GetFrameAtIndex(0)
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# Store away the PC to check that the functions unwind to the right place after calls
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self.orig_frame_pc = frame.GetPC()
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num_sigchld = 30
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value = frame.EvaluateExpression ("call_me (%d)"%(num_sigchld), options)
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self.assertTrue (value.IsValid())
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self.assertTrue (value.GetError().Success() == True)
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self.assertTrue (value.GetValueAsSigned(-1) == num_sigchld)
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self.check_after_call(num_sigchld)
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# Okay, now try with a breakpoint in the called code in the case where
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# we are ignoring breakpoint hits.
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handler_bkpt = target.BreakpointCreateBySourceRegex("Got sigchld %d.", self.main_source_spec)
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self.assertTrue (handler_bkpt.GetNumLocations() > 0)
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options.SetIgnoreBreakpoints(True)
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options.SetUnwindOnError(True)
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value = frame.EvaluateExpression("call_me (%d)"%(num_sigchld), options)
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self.assertTrue (value.IsValid() and value.GetError().Success() == True)
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self.assertTrue (value.GetValueAsSigned(-1) == num_sigchld)
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self.check_after_call(num_sigchld)
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# Now set the signal to print but not stop and make sure that calling still works:
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self.dbg.GetCommandInterpreter().HandleCommand("process handle SIGCHLD -s 0 -p 1 -n 1", return_obj)
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self.assertTrue (return_obj.Succeeded() == True, "Set SIGCHLD to pass, no-stop, notify")
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value = frame.EvaluateExpression("call_me (%d)"%(num_sigchld), options)
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self.assertTrue (value.IsValid() and value.GetError().Success() == True)
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self.assertTrue (value.GetValueAsSigned(-1) == num_sigchld)
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self.check_after_call(num_sigchld)
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# Now set this unwind on error to false, and make sure that we still complete the call:
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options.SetUnwindOnError(False)
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value = frame.EvaluateExpression("call_me (%d)"%(num_sigchld), options)
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self.assertTrue (value.IsValid() and value.GetError().Success() == True)
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self.assertTrue (value.GetValueAsSigned(-1) == num_sigchld)
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self.check_after_call(num_sigchld)
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# Okay, now set UnwindOnError to true, and then make the signal behavior to stop
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# and see that now we do stop at the signal point:
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self.dbg.GetCommandInterpreter().HandleCommand("process handle SIGCHLD -s 1 -p 1 -n 1", return_obj)
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self.assertTrue (return_obj.Succeeded() == True, "Set SIGCHLD to pass, stop, notify")
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value = frame.EvaluateExpression("call_me (%d)"%(num_sigchld), options)
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self.assertTrue (value.IsValid() and value.GetError().Success() == False)
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# Set signal handling back to no-stop, and continue and we should end up back in out starting frame:
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self.dbg.GetCommandInterpreter().HandleCommand("process handle SIGCHLD -s 0 -p 1 -n 1", return_obj)
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self.assertTrue (return_obj.Succeeded() == True, "Set SIGCHLD to pass, no-stop, notify")
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error = process.Continue()
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self.assertTrue (error.Success(), "Continuing after stopping for signal succeeds.")
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frame = self.thread.GetFrameAtIndex(0)
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self.assertTrue (frame.GetPC() == self.orig_frame_pc, "Continuing returned to the place we started.")
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