1"""
2Check that missing module source files are correctly handled by LLDB.
3"""
4
5from lldbsuite.test.decorators import *
6from lldbsuite.test.lldbtest import *
7from lldbsuite.test import lldbutil
8import os
9import shutil
10
11
12class TestCase(TestBase):
13
14    mydir = TestBase.compute_mydir(__file__)
15
16    # We only emulate a fake libc++ in this test and don't use the real libc++,
17    # but we still add the libc++ category so that this test is only run in
18    # test configurations where libc++ is actually supposed to be tested.
19    @add_test_categories(["libc++"])
20    @skipIf(compiler=no_match("clang"))
21    @skipIfRemote
22    def test(self):
23        # The path to our temporary target root that contains the temporary
24        # module sources.
25        target_sysroot = self.getBuildArtifact("root")
26
27        # Copy the sources to the root.
28        shutil.copytree(self.getSourcePath("root"), target_sysroot)
29        # Build the binary with the copied sources.
30        self.build()
31        # Delete the copied sources so that they are now unavailable.
32        shutil.rmtree(target_sysroot)
33
34        # Set the sysroot where our dummy libc++ used to exist. Just to make
35        # sure we don't find some existing headers on the system that could
36        # XPASS this test.
37        self.runCmd("platform select --sysroot '" + target_sysroot + "' host")
38
39        lldbutil.run_to_source_breakpoint(self,
40                                          "// Set break point at this line.",
41                                          lldb.SBFileSpec("main.cpp"))
42
43        # Import the std C++ module and run an expression.
44        # As we deleted the sources, LLDB should refuse the load the module
45        # and just print the normal error we get from the expression.
46        self.runCmd("settings set target.import-std-module true")
47        self.expect("expr v.unknown_identifier", error=True,
48                    substrs=["no member named 'unknown_identifier'"])
49        # Check that there is no confusing error about failing to build the
50        # module.
51        self.expect("expr v.unknown_identifier", error=True, matching=False,
52                    substrs=["could not build module 'std'"])
53
54        # Test the fallback mode. It should also just print the normal
55        # error but not mention a failed module build.
56        self.runCmd("settings set target.import-std-module fallback")
57
58        self.expect("expr v.unknown_identifier", error=True,
59                     substrs=["no member named 'unknown_identifier'"])
60        self.expect("expr v.unknown_identifier", error=True, matching=False,
61                    substrs=["could not build module 'std'"])
62