xref: /llvm-project/lldb/test/API/macosx/stack-corefile/TestStackCorefile.py (revision 065e3c9a8e55aacf06eb069d8916597ce13b36b5)
1"""Test that lldb can create a stack-only corefile, and load the main binary."""
2
3import os
4import re
5import subprocess
6
7import lldb
8from lldbsuite.test.decorators import *
9from lldbsuite.test.lldbtest import *
10from lldbsuite.test import lldbutil
11
12class TestStackCorefile(TestBase):
13
14    mydir = TestBase.compute_mydir(__file__)
15
16    @skipIfOutOfTreeDebugserver  # newer debugserver required for these qMemoryRegionInfo types
17    @no_debug_info_test
18    @skipUnlessDarwin
19    @skipIfRemote
20    def test(self):
21
22        corefile = self.getBuildArtifact("process.core")
23        self.build()
24        (target, process, thread, bkpt) = lldbutil.run_to_source_breakpoint(
25            self, "// break here", lldb.SBFileSpec("main.c"))
26
27        frame = thread.GetFrameAtIndex(0)
28        stack_int = frame.GetValueForVariablePath("stack_int")
29        heap_int = frame.GetValueForVariablePath("*heap_int")
30        stack_str = frame.GetValueForVariablePath("stack_str")
31        heap_str = frame.GetValueForVariablePath("heap_str")
32        self.assertEqual(stack_int.GetValueAsUnsigned(), 5)
33        self.assertEqual(heap_int.GetValueAsUnsigned(), 10)
34        self.assertEqual(stack_str.summary, '"stack string"')
35        self.assertEqual(heap_str.summary, '"heap string"')
36
37        self.runCmd("process save-core -s stack " + corefile)
38        process.Kill()
39        self.dbg.DeleteTarget(target)
40
41        # Now load the corefile
42        target = self.dbg.CreateTarget('')
43        process = target.LoadCore(corefile)
44        thread = process.GetSelectedThread()
45        self.assertTrue(process.IsValid())
46        self.assertTrue(process.GetSelectedThread().IsValid())
47        if self.TraceOn():
48            self.runCmd("image list")
49            self.runCmd("bt")
50            self.runCmd("fr v")
51        num_modules = target.GetNumModules()
52        #  We should only have the a.out binary and possibly
53        # the libdyld.dylib.  Extra libraries loaded means
54        # extra LC_NOTE and unnecessarily large corefile.
55        self.assertTrue(num_modules == 1 or num_modules == 2)
56
57        # The heap variables should be unavailable now.
58        frame = thread.GetFrameAtIndex(0)
59        stack_int = frame.GetValueForVariablePath("stack_int")
60        heap_int = frame.GetValueForVariablePath("*heap_int")
61        stack_str = frame.GetValueForVariablePath("stack_str")
62        heap_str = frame.GetValueForVariablePath("heap_str")
63
64        ## The heap SBValues both come back as IsValid()==true,
65        ## which I'm not so sure is a great/correct thing --
66        ## it hides the memory read error that actually happened,
67        ## and we don't have a real value.
68        self.assertEqual(stack_int.GetValueAsUnsigned(), 5)
69        self.assertEqual(heap_int.GetValueAsUnsigned(), 0)
70        self.assertEqual(stack_str.summary, '"stack string"')
71        self.assertEqual(heap_str.summary, '""')
72