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"""
Test that re-running a process from within the same target
after rebuilding the executable flushes the scratch TypeSystems
tied to that process.
"""
import lldb
from lldbsuite.test.lldbtest import *
from lldbsuite.test import lldbutil
from lldbsuite.test.decorators import *
class TestRerunExpr(TestBase):
# FIXME: on Windows rebuilding the binary isn't enough to unload it
# on progrem restart. One will have to try hard to evict
# the module from the ModuleList (possibly including a call to
# SBDebugger::MemoryPressureDetected.
@skipIfWindows
def test(self):
"""
Tests whether re-launching a process without destroying
the owning target keeps invalid ASTContexts in the
scratch AST's importer.
We test this by:
1. Evaluating an expression to import 'struct Foo' into
the scratch AST
2. Change the definition of 'struct Foo' and rebuild the executable
3. Re-launch the process
4. Evaluate the same expression in (1). We expect to have only
the latest definition of 'struct Foo' in the scratch AST.
"""
self.build(dictionary={"CXX_SOURCES": "main.cpp", "EXE": "a.out"})
exe = self.getBuildArtifact("a.out")
target = self.dbg.CreateTarget(exe)
target.BreakpointCreateBySourceRegex("return", lldb.SBFileSpec("rebuild.cpp"))
target.BreakpointCreateBySourceRegex("return", lldb.SBFileSpec("main.cpp"))
process = target.LaunchSimple(None, None, self.get_process_working_directory())
self.expect_expr(
"foo",
result_type="Foo",
result_children=[ValueCheck(name="m_val", value="42")],
)
# Delete the executable to force make to rebuild it.
remove_file(exe)
self.build(dictionary={"CXX_SOURCES": "rebuild.cpp", "EXE": "a.out"})
# Rerun program within the same target
process.Destroy()
process = target.LaunchSimple(None, None, self.get_process_working_directory())
self.expect_expr(
"foo",
result_type="Foo",
result_children=[
ValueCheck(
name="Base", children=[ValueCheck(name="m_base_val", value="42")]
),
ValueCheck(name="m_derived_val", value="137"),
],
)
self.filecheck("target module dump ast", __file__)
# The new definition 'struct Foo' is in the scratch AST
# CHECK: |-CXXRecordDecl {{.*}} struct Foo definition
# CHECK: | |-public 'Base'
# CHECK-NEXT: | `-FieldDecl {{.*}} m_derived_val 'int'
# CHECK-NEXT: `-CXXRecordDecl {{.*}} struct Base definition
# CHECK: `-FieldDecl {{.*}} m_base_val 'int'
# ...but the original definition of 'struct Foo' is not in the scratch AST anymore
# CHECK-NOT: FieldDecl {{.*}} m_val 'int'
|
