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    def test(self):
22        # The path to our temporary target root that contains the temporary
23        # module sources.
24        target_sysroot = self.getBuildArtifact("root")
25
26        # Copy the sources to the root.
27        shutil.copytree(self.getSourcePath("root"), target_sysroot)
28        # Build the binary with the copied sources.
29        self.build()
30        # Delete the copied sources so that they are now unavailable.
31        shutil.rmtree(target_sysroot)
32
33        # Set the sysroot where our dummy libc++ used to exist. Just to make
34        # sure we don't find some existing headers on the system that could
35        # XPASS this test.
36        self.runCmd("platform select --sysroot '" + target_sysroot + "' host")
37
38        lldbutil.run_to_source_breakpoint(self,
39                                          "// Set break point at this line.",
40                                          lldb.SBFileSpec("main.cpp"))
41
42        # Import the std C++ module and run an expression.
43        # As we deleted the sources, LLDB should refuse the load the module
44        # and just print the normal error we get from the expression.
45        self.runCmd("settings set target.import-std-module true")
46        self.expect("expr v.unknown_identifier", error=True,
47                    substrs=["no member named 'unknown_identifier'"])
48        # Check that there is no confusing error about failing to build the
49        # module.
50        self.expect("expr v.unknown_identifier", error=True, matching=False,
51                    substrs=["could not build module 'std'"])
52
53        # Test the fallback mode. It should also just print the normal
54        # error but not mention a failed module build.
55        self.runCmd("settings set target.import-std-module fallback")
56
57        self.expect("expr v.unknown_identifier", error=True,
58                     substrs=["no member named 'unknown_identifier'"])
59        self.expect("expr v.unknown_identifier", error=True, matching=False,
60                    substrs=["could not build module 'std'"])
61