10b048c892
I ran into this while look at a different bug (patch coming soon). This function has only two callers. The first is SBTypeStaticField::GetName (which doesn't care about templates), and the other is CompilerDecl::GetCompilerContext (in the TypeQuery constructor), which does want template arguments. This function was (normally) returning the name without template args. Since this code is only used when looking up a type in another shared library, the odds of running into this bug are relatively low, but I add a test to demonstrate the scenario and the fix for it nonetheless. Amazingly (and scarily), this test actually passes without this change in the default configuration -- and only fails with -gsimple-template-names. The reason for that is that in the non-simplified case we create a regular CXXRecordDecl whose name is "bar<int>" (instead of a template record "foo" with an argument of "int"). When evaluating the expression, we are somehow able to replace this with a proper template specialization decl.
62 lines
2.1 KiB
Python
62 lines
2.1 KiB
Python
"""Test that forward declaration of a c++ template gets resolved correctly."""
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import lldb
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from lldbsuite.test.lldbtest import *
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from lldbsuite.test.decorators import *
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import lldbsuite.test.lldbutil as lldbutil
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class ForwardDeclarationTestCase(TestBase):
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def do_test(self, dictionary=None):
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"""Display *bar_ptr when stopped on a function with forward declaration of struct bar."""
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self.build(dictionary=dictionary)
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exe = self.getBuildArtifact("a.out")
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target = self.dbg.CreateTarget(exe)
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self.assertTrue(target, VALID_TARGET)
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environment = self.registerSharedLibrariesWithTarget(target, ["foo"])
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# Break inside the foo function which takes a bar_ptr argument.
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lldbutil.run_break_set_by_symbol(self, "foo", num_expected_locations=1)
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process = target.LaunchSimple(
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None, environment, self.get_process_working_directory()
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)
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self.assertTrue(process, PROCESS_IS_VALID)
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# The stop reason of the thread should be breakpoint.
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self.expect(
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"thread list",
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STOPPED_DUE_TO_BREAKPOINT,
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substrs=["stopped", "stop reason = breakpoint"],
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)
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# The breakpoint should have a hit count of 1.
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lldbutil.check_breakpoint(self, bpno=1, expected_hit_count=1)
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self.expect_expr(
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"*bar_ptr",
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result_type="bar<int>",
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result_children=[ValueCheck(value="47", name="a", type="int")],
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)
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def test(self):
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self.do_test()
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@no_debug_info_test
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@skipIfDarwin
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@skipIf(compiler=no_match("clang"))
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@skipIf(compiler_version=["<", "8.0"])
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@expectedFailureAll(oslist=["windows"])
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def test_debug_names(self):
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"""Test that we are able to find complete types when using DWARF v5
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accelerator tables"""
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self.do_test(dict(CFLAGS_EXTRAS="-gdwarf-5 -gpubnames"))
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@no_debug_info_test
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@skipIf(compiler=no_match("clang"))
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def test_simple_template_names(self):
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"""Test that we are able to find complete types when using DWARF v5
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accelerator tables"""
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self.do_test(dict(CFLAGS_EXTRAS="-gsimple-template-names"))
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