forked from OSchip/llvm-project
88 lines
3.3 KiB
Python
88 lines
3.3 KiB
Python
"""
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Test C++ virtual function and virtual inheritance.
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"""
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import os, time
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import re
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import lldb
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from lldbtest import *
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import lldbutil
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def Msg(expr, val):
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return "'expression %s' matches the output (from compiled code): %s" % (expr, val)
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class CppVirtualMadness(TestBase):
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mydir = os.path.join("lang", "cpp", "virtual")
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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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# Assert message.
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PRINTF_OUTPUT_GROKKED = "The printf output from compiled code is parsed correctly"
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@unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
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def test_virtual_madness_dsym(self):
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"""Test that expression works correctly with virtual inheritance as well as virtual function."""
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self.buildDsym()
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self.virtual_madness_test()
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def test_virtual_madness_dwarf(self):
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"""Test that expression works correctly with virtual inheritance as well as virtual function."""
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self.buildDwarf()
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self.virtual_madness_test()
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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.line = line_number('main.cpp', '// Set first breakpoint here.')
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def virtual_madness_test(self):
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"""Test that variable expressions with basic types are evaluated correctly."""
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# First, capture the golden output emitted by the oracle, i.e., the
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# series of printf statements.
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go = system("./a.out", sender=self)[0]
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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 go.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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# 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.runCmd("file a.out", CURRENT_EXECUTABLE_SET)
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lldbutil.run_break_set_by_file_and_line (self, "main.cpp", self.line, num_expected_locations=1, loc_exact=False)
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self.runCmd("run", RUN_SUCCEEDED)
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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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# Don't overwhelm the expression mechanism.
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# This slows down the test suite quite a bit, to enable it, define
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# the environment variable LLDB_TYPES_EXPR_TIME_WAIT. For example:
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#
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# export LLDB_TYPES_EXPR_TIME_WAIT=0.5
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#
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# causes a 0.5 second delay between 'expression' commands.
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if "LLDB_TYPES_EXPR_TIME_WAIT" in os.environ:
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time.sleep(float(os.environ["LLDB_TYPES_EXPR_TIME_WAIT"]))
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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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