bf2d84db8e
(Note, this upstreams code that has been deployed on Apple's Swift LLDB for many years at this point). When a `ValueObject` computes its "complete type" (`MaybeCalculateCompleteType`), it gives the language runtimes a chance to override the type known to it. The current implementation of `ObjCLanguageRuntime::GetRuntimeType`, however, didn't consult the `AppleObjCDeclVendor` to look for types. As demonstrated in the attached test, when we don't have debug-info for a base class type (most commonly happens when inheriting from system framework types) we would not be able to deduce ivars of that type. However, the runtime knows about the ivars, so we should be able to retrieve them. There's still a couple of caveats for future follow-up/investigation: 1. `frame var` isn't able to access such backing ivars explicitly (even if they do exist) 2. When compiling with `-gmodules`, LLDB gets confused about what is correct source of information for these decls is. rdar://162069497
40 lines
1.4 KiB
Python
40 lines
1.4 KiB
Python
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 TestIvarInFrameworkBase(TestBase):
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"""
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Tests whether LLDB's data inspection commands can correctly retrieve
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information about ivars from the Objective-C runtime.
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In this test-case we have a base class type for which we don't have access
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to the debug-info of the implementation (mimicking the scenario of subclassing
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a type from a system framework). LLDB won't be able to see the backing ivar for
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'fooProp' from just debug-info, but it will fall back on the runtime to get the
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necessary information.
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"""
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def test_frame_var(self):
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self.build()
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lldbutil.run_to_source_breakpoint(self, "break here", lldb.SBFileSpec("main.m"))
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self.expect("frame variable *bar", substrs=["_fooProp = 10", "_barProp = 15"])
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def test_expr(self):
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self.build()
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lldbutil.run_to_source_breakpoint(self, "break here", lldb.SBFileSpec("main.m"))
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self.expect_expr(
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"*bar",
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result_type="Bar",
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result_children=[
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ValueCheck(
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name="Foo",
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children=[
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ValueCheck(name="NSObject"),
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ValueCheck(name="_fooProp", value="10"),
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],
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),
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ValueCheck(name="_barProp", value="15"),
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],
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)
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