2013-05-08 23:09:30 +08:00
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"""
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Test lldb ability to unwind a stack with a function containing a call to the
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'__builtin_trap' intrinsic, which GCC (4.6) encodes to an illegal opcode.
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"""
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import os
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import unittest2
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import lldb
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from lldbtest import *
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import lldbutil
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class BuiltinTrapTestCase(TestBase):
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2013-12-11 07:19:29 +08:00
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mydir = TestBase.compute_mydir(__file__)
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2013-05-08 23:09:30 +08:00
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@unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
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@dsym_test
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def test_with_dsym_and_run_command(self):
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"""Test that LLDB handles a function with __builtin_trap correctly."""
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self.buildDsym()
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self.builtin_trap_unwind()
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@dwarf_test
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2013-05-16 02:48:32 +08:00
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@expectedFailureGcc # llvm.org/pr15936: LLDB is omits a function that contains an
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2013-05-08 23:09:30 +08:00
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# illegal opcode from backtraces. This
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# failure is GCC 4.6 specific.
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def test_with_dwarf_and_run_command(self):
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"""Test that LLDB handles a function with __builtin_trap correctly."""
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self.buildDwarf()
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self.builtin_trap_unwind()
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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 at.
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self.line = line_number('main.cpp', '// Set break point at this line.')
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def builtin_trap_unwind(self):
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"""Test that LLDB handles unwinding a frame that contains a function
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with a __builtin_trap intrinsic.
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"""
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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,
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num_expected_locations=1,
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loc_exact=True)
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self.runCmd("run", RUN_SUCCEEDED)
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# The stop reason of the thread should be breakpoint.
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self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
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substrs = ['stopped',
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'stop reason = breakpoint'])
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# print backtrace, expect both 'bar' and 'main' functions to be listed
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self.expect('bt', substrs = ['bar', 'main'])
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# go up one frame
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self.runCmd("up", RUN_SUCCEEDED)
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# evaluate a local
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self.expect('p foo', substrs = ['= 5'])
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if __name__ == '__main__':
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import atexit
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lldb.SBDebugger.Initialize()
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atexit.register(lambda: lldb.SBDebugger.Terminate())
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unittest2.main()
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