forked from OSchip/llvm-project
103 lines
3.5 KiB
Python
103 lines
3.5 KiB
Python
"""
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Test C++ virtual function and virtual inheritance.
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"""
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from __future__ import print_function
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import os
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import time
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import re
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import lldb
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from lldbsuite.test.decorators import *
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from lldbsuite.test.lldbtest import *
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from lldbsuite.test import lldbutil
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def Msg(expr, val):
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return "'expression %s' matches the output (from compiled code): %s" % (
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expr, val)
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class CppVirtualMadness(TestBase):
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mydir = TestBase.compute_mydir(__file__)
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# This is the pattern by design to match the "my_expr = 'value'" output from
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# printf() stmts (see main.cpp).
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pattern = re.compile("^([^=]*) = '([^=]*)'$")
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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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# Find the line number to break for main.cpp.
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self.source = 'main.cpp'
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self.line = line_number(self.source, '// Set first breakpoint here.')
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@expectedFailureAll(
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compiler="icc",
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bugnumber="llvm.org/pr16808 lldb does not call the correct virtual function with icc.")
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def test_virtual_madness(self):
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"""Test that expression works correctly with virtual inheritance as well as virtual function."""
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self.build()
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# Bring the program to the point where we can issue a series of
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# 'expression' command to compare against the golden output.
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self.dbg.SetAsync(False)
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# Create a target by the debugger.
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target = self.dbg.CreateTarget("a.out")
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self.assertTrue(target, VALID_TARGET)
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# Create the breakpoint inside function 'main'.
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breakpoint = target.BreakpointCreateByLocation(self.source, self.line)
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self.assertTrue(breakpoint, VALID_BREAKPOINT)
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# Now launch the process, and do not stop at entry point.
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process = target.LaunchSimple(
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None, None, self.get_process_working_directory())
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self.assertTrue(process, PROCESS_IS_VALID)
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self.assertTrue(process.GetState() == lldb.eStateStopped)
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thread = lldbutil.get_stopped_thread(
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process, lldb.eStopReasonBreakpoint)
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self.assertTrue(
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thread.IsValid(),
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"There should be a thread stopped due to breakpoint condition")
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# First, capture the golden output from the program itself.
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golden = thread.GetFrameAtIndex(0).FindVariable("golden")
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self.assertTrue(
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golden.IsValid(),
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"Encountered an error reading the process's golden variable")
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error = lldb.SBError()
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golden_str = process.ReadCStringFromMemory(
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golden.AddressOf().GetValueAsUnsigned(), 4096, error)
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self.assertTrue(error.Success())
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self.assertTrue("c_as_C" in golden_str)
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# This golden list contains a list of "my_expr = 'value' pairs extracted
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# from the golden output.
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gl = []
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# Scan the golden output line by line, looking for the pattern:
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#
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# my_expr = 'value'
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#
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for line in golden_str.split(os.linesep):
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match = self.pattern.search(line)
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if match:
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my_expr, val = match.group(1), match.group(2)
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gl.append((my_expr, val))
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#print("golden list:", gl)
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# Now iterate through the golden list, comparing against the output from
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# 'expression var'.
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for my_expr, val in gl:
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self.runCmd("expression %s" % my_expr)
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output = self.res.GetOutput()
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# The expression output must match the oracle.
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self.expect(output, Msg(my_expr, val), exe=False,
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substrs=[val])
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