2238dcc393
This is an ongoing series of commits that are reformatting our Python code. Reformatting is done with `black` (23.1.0). If you end up having problems merging this commit because you have made changes to a python file, the best way to handle that is to run `git checkout --ours <yourfile>` and then reformat it with black. RFC: https://discourse.llvm.org/t/rfc-document-and-standardize-python-code-style Differential revision: https://reviews.llvm.org/D151460
124 lines
4.0 KiB
Python
124 lines
4.0 KiB
Python
"""
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Test that re-running a process from within the same target
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after rebuilding the a dynamic library flushes the scratch
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TypeSystems tied to that process.
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"""
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import lldb
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from lldbsuite.test.lldbtest import *
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from lldbsuite.test import lldbutil
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from lldbsuite.test.decorators import *
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def isUbuntu18_04():
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"""
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Check if the host OS is Ubuntu 18.04.
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Derived from `platform.freedesktop_os_release` in Python 3.10.
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"""
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for path in ("/etc/os-release", "/usr/lib/os-release"):
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if os.path.exists(path):
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with open(path) as f:
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contents = f.read()
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if "Ubuntu 18.04" in contents:
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return True
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return False
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class TestRerunExprDylib(TestBase):
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@skipTestIfFn(isUbuntu18_04, bugnumber="rdar://103831050")
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@skipIfWindows
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def test(self):
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"""
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Tests whether re-launching a process without destroying
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the owning target keeps invalid ASTContexts in the
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scratch AST's importer.
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We test this by:
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1. Evaluating an expression to import 'struct Foo' into
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the scratch AST
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2. Change the definition of 'struct Foo' and rebuild the dylib
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3. Re-launch the process
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4. Evaluate the same expression in (1). We expect to have only
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the latest definition of 'struct Foo' in the scratch AST.
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"""
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DYLIB_NAME = "foo"
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FULL_DYLIB_NAME = "libfoo.dylib" if self.platformIsDarwin() else "libfoo.so"
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# Build libfoo.dylib
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self.build(
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dictionary={
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"DYLIB_CXX_SOURCES": "lib.cpp",
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"DYLIB_ONLY": "YES",
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"DYLIB_NAME": DYLIB_NAME,
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"USE_LIBDL": "1",
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"LD_EXTRAS": "-L.",
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}
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)
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# Build a.out
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self.build(
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dictionary={
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"EXE": "a.out",
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"CXX_SOURCES": "main.cpp",
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"USE_LIBDL": "1",
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"CXXFLAGS_EXTRAS": f'-DLIB_NAME=\\"{FULL_DYLIB_NAME}\\"',
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"LD_EXTRAS": "-L.",
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}
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)
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exe = self.getBuildArtifact("a.out")
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target = self.dbg.CreateTarget(exe)
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target.BreakpointCreateBySourceRegex("dlclose", lldb.SBFileSpec("main.cpp"))
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target.BreakpointCreateBySourceRegex("return", lldb.SBFileSpec("main.cpp"))
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process = target.LaunchSimple(None, None, self.get_process_working_directory())
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self.expect_expr(
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"*foo",
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result_type="Foo",
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result_children=[ValueCheck(name="m_val", value="42")],
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)
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# Delete the dylib to force make to rebuild it.
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remove_file(self.getBuildArtifact(FULL_DYLIB_NAME))
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# Re-build libfoo.dylib
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self.build(
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dictionary={
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"DYLIB_CXX_SOURCES": "rebuild.cpp",
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"DYLIB_ONLY": "YES",
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"DYLIB_NAME": DYLIB_NAME,
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"USE_LIBDL": "1",
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"LD_EXTRAS": "-L.",
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}
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)
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# Rerun program within the same target
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process.Continue()
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process.Destroy()
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process = target.LaunchSimple(None, None, self.get_process_working_directory())
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self.expect_expr(
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"*foo",
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result_type="Foo",
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result_children=[
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ValueCheck(
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name="Base", children=[ValueCheck(name="m_base_val", value="42")]
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),
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ValueCheck(name="m_derived_val", value="137"),
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],
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)
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self.filecheck("target module dump ast", __file__)
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# The new definition 'struct Foo' is in the scratch AST
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# CHECK: |-CXXRecordDecl {{.*}} struct Foo definition
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# CHECK: | |-public 'Base'
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# CHECK-NEXT: | `-FieldDecl {{.*}} m_derived_val 'int'
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# CHECK-NEXT: `-CXXRecordDecl {{.*}} struct Base definition
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# CHECK: `-FieldDecl {{.*}} m_base_val 'int'
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# ...but the original definition of 'struct Foo' is not in the scratch AST anymore
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# CHECK-NOT: FieldDecl {{.*}} m_val 'int'
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