07ffb7e294
Layout information for a record gets stored in the `ClangASTImporter` associated with the `DWARFASTParserClang` that originally parsed the record. LLDB sometimes moves clang types from one AST to another (in the reproducer the origin AST was a precompiled-header and the destination was the AST backing the executable). When clang then asks LLDB to `layoutRecordType`, it will do so with the help of the `ClangASTImporter` the type is associated with. If the type's origin is actually in a different LLDB module (and thus a different `DWARFASTParserClang` was used to set its layout info), we won't find the layout info in our local `ClangASTImporter`. In the reproducer this meant we would drop the alignment info of the origin type and misread a variable's contents with `frame var` and `expr`. There is logic in `ClangASTSource::layoutRecordType` to import an origin's layout info. This patch re-uses that infrastructure to import an origin's layout from one `ClangASTImporter` instance to another. rdar://123274144
61 lines
1.8 KiB
Python
61 lines
1.8 KiB
Python
"""
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Tests that we correctly track AST layout info
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(specifically alignment) when moving AST nodes
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between ClangASTImporter instances (in this case,
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from pch to executable to expression AST).
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"""
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import lldb
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import os
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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 TestPchAlignment(TestBase):
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@add_test_categories(["gmodules"])
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def test_expr(self):
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self.build()
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lldbutil.run_to_source_breakpoint(
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self, "return data", lldb.SBFileSpec("main.cpp")
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)
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self.expect(
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"frame variable data",
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substrs=["row = 1", "col = 2", "row = 3", "col = 4", "stride = 5"],
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)
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@add_test_categories(["gmodules"])
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def test_frame_var(self):
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self.build()
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lldbutil.run_to_source_breakpoint(
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self, "return data", lldb.SBFileSpec("main.cpp")
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)
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self.expect_expr(
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"data",
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result_type="MatrixData",
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result_children=[
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ValueCheck(
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name="section",
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children=[
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ValueCheck(
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name="origin",
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children=[
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ValueCheck(name="row", value="1"),
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ValueCheck(name="col", value="2"),
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],
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),
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ValueCheck(
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name="size",
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children=[
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ValueCheck(name="row", value="3"),
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ValueCheck(name="col", value="4"),
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],
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),
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],
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),
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ValueCheck(name="stride", value="5"),
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],
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)
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