xref: /llvm-project/lldb/test/API/functionalities/dyld-exec-linux/TestDyldExecLinux.py (revision 2238dcc39358353cac21df75c3c3286ab20b8f53) 
1"""
2Test that LLDB can launch a linux executable and then execs into the dynamic
3loader into this program again.
4"""
5
6import lldb
7import os
8
9from lldbsuite.test.decorators import *
10from lldbsuite.test.lldbtest import *
11from lldbsuite.test import lldbutil
12
13
14class TestLinux64ExecViaDynamicLoader(TestBase):
15    NO_DEBUG_INFO_TESTCASE = True
16
17    @skipIfXmlSupportMissing
18    @skipIf(oslist=no_match(["linux"]))
19    def test_with_svr4(self):
20        self.runCmd("settings set plugin.process.gdb-remote.use-libraries-svr4 true")
21        self._test()
22
23    @skipIf(oslist=no_match(["linux"]))
24    def test_without_svr4(self):
25        self.runCmd("settings set plugin.process.gdb-remote.use-libraries-svr4 false")
26        self._test()
27
28    def _test(self):
29        self.build()
30
31        # Extracts path of the interpreter.
32        exe = self.getBuildArtifact("a.out")
33
34        spec = lldb.SBModuleSpec()
35        spec.SetFileSpec(lldb.SBFileSpec(exe))
36        interp_section = lldb.SBModule(spec).FindSection(".interp")
37        if not interp_section:
38            return
39        section_data = interp_section.GetSectionData()
40        error = lldb.SBError()
41        dyld_path = section_data.GetString(error, 0)
42        if error.Fail():
43            return
44
45        target = self.dbg.CreateTarget(exe)
46        self.assertTrue(target, VALID_TARGET)
47
48        # Set a breakpoint in the main function that will get hit after the
49        # program exec's via the dynamic loader. The breakpoint will only get
50        # hit if we can successfully read the shared library lists in the
51        # DynamicLoaderPOSIXDYLD.cpp when we exec into the dynamic loader.
52        breakpoint_main = target.BreakpointCreateBySourceRegex(
53            "// Break here", lldb.SBFileSpec("main.cpp")
54        )
55        # Setup our launch info to supply the dynamic loader path to the
56        # program so it gets two args:
57        # - path to a.out
58        # - path to dynamic loader
59        launch_info = lldb.SBLaunchInfo([dyld_path])
60        error = lldb.SBError()
61        process = target.Launch(launch_info, error)
62        self.assertSuccess(error)
63
64        threads = lldbutil.get_stopped_threads(process, lldb.eStopReasonExec)
65        self.assertEqual(len(threads), 1, "We got a thread stopped for exec.")
66
67        process.Continue()
68
69        # Stopped on main here.
70        self.assertState(process.GetState(), lldb.eStateStopped)
71        thread = process.GetSelectedThread()
72        self.assertIn("main", thread.GetFrameAtIndex(0).GetDisplayFunctionName())
73