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675767a591
When importing C++ methods into clang AST nodes from the DWARF symbol
table, preserve the DW_AT_linkage_name and use it as the linker
("asm") name for the symbol.
Concretely, this enables `expression` to call into names that use the
GNU `abi_tag` extension, and enables lldb to call into code using
std::string or std::list from recent versions of libstdc++. See
https://bugs.llvm.org/show_bug.cgi?id=35310 . It also seems broadly
more robust than relying on the DWARF->clang->codegen pipeline to
roundtrip properly, but I'm not immediately aware of any other cases
in which it makes a difference.
Patch by Nelson Elhage!
Differential Revision: https://reviews.llvm.org/D40283
llvm-svn: 328658
40 lines
1.3 KiB
Python
40 lines
1.3 KiB
Python
from __future__ import print_function
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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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class ExprBug35310(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 = "main.cpp"
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self.main_source_spec = lldb.SBFileSpec(self.main_source)
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def test_issue35310(self):
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"""Test invoking functions with non-standard linkage names.
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The GNU abi_tag extension used by libstdc++ is a common source
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of these, but they could originate from other reasons as well.
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"""
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self.build()
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(target, process, thread, bkpt) = lldbutil.run_to_source_breakpoint(self,
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'// Break here', self.main_source_spec)
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frame = thread.GetFrameAtIndex(0)
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value = frame.EvaluateExpression("a.test_abi_tag()")
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self.assertTrue(value.IsValid())
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self.assertTrue(value.GetError().Success())
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self.assertEqual(value.GetValueAsSigned(0), 1)
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value = frame.EvaluateExpression("a.test_asm_name()")
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self.assertTrue(value.IsValid())
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self.assertTrue(value.GetError().Success())
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self.assertEqual(value.GetValueAsSigned(0), 2)
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