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9b087d2ce6
Summary: This patch fixes the next situation. On Windows clang-cl makes no stub before the main function, so the main function is located exactly on module entry point. May be it is the same on other platforms. So consider the following sequence: - set a breakpoint on main and stop there; - try to evaluate expression, which requires a code execution on the debuggee side. Such an execution always returns to the module entry, and the plan waits for it there; - the plan understands that it is complete now and removes its breakpoint. But the breakpoint site is still there, because we also have a breakpoint on entry; - StopInfo analyzes a situation. It sees that we have stopped on the breakpoint site, and it sees that the breakpoint site has owners, and no one logical breakpoint is internal (because the plan is already completed and it have removed its breakpoint); - StopInfo thinks that it's a user breakpoint and skips it to avoid recursive computations; - the program continues. So in this situation the program continues without a stop right after the expression evaluation. To avoid this an additional check that the plan was completed was added. Reviewers: jingham, zturner, boris.ulasevich Reviewed by: jingham Tags: #lldb Differential Revision: https://reviews.llvm.org/D53761 llvm-svn: 347974
35 lines
1.2 KiB
Python
35 lines
1.2 KiB
Python
"""
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Tests expressions evaluation when the breakpoint on module's entry is set.
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"""
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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 ExprEntryBPTestCase(TestBase):
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mydir = TestBase.compute_mydir(__file__)
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NO_DEBUG_INFO_TESTCASE = True
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def test_expr_entry_bp(self):
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"""Tests expressions evaluation when the breakpoint on module's entry is set."""
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self.build()
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self.main_source_file = lldb.SBFileSpec("main.c")
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(target, process, thread, bkpt) = lldbutil.run_to_source_breakpoint(self, "Set a breakpoint here", self.main_source_file)
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self.assertEqual(1, bkpt.GetNumLocations())
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entry = bkpt.GetLocationAtIndex(0).GetAddress().GetModule().GetObjectFileEntryPointAddress()
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self.assertTrue(entry.IsValid(), "Can't get a module entry point")
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entry_bp = target.BreakpointCreateBySBAddress(entry)
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self.assertTrue(entry_bp.IsValid(), "Can't set a breakpoint on the module entry point")
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result = target.EvaluateExpression("sum(7, 1)")
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self.assertTrue(result.IsValid(), "Can't evaluate expression")
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self.assertEqual(8, result.GetValueAsSigned())
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def setUp(self):
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TestBase.setUp(self)
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