xref: /llvm-project/lldb/test/API/macosx/stack-corefile/TestStackCorefile.py (revision 2b30fc2ff3cadd085f7103cb953cd9cf091ee9b9) 
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    def test(self):
20
21        corefile = self.getBuildArtifact("process.core")
22        self.build()
23        (target, process, thread, bkpt) = lldbutil.run_to_source_breakpoint(
24            self, "// break here", lldb.SBFileSpec("main.c"))
25
26        frame = thread.GetFrameAtIndex(0)
27        stack_int = frame.GetValueForVariablePath("stack_int")
28        heap_int = frame.GetValueForVariablePath("*heap_int")
29        stack_str = frame.GetValueForVariablePath("stack_str")
30        heap_str = frame.GetValueForVariablePath("heap_str")
31        self.assertEqual(stack_int.GetValueAsUnsigned(), 5)
32        self.assertEqual(heap_int.GetValueAsUnsigned(), 10)
33        self.assertEqual(stack_str.summary, '"stack string"')
34        self.assertEqual(heap_str.summary, '"heap string"')
35
36        self.runCmd("process save-core -s stack " + corefile)
37        process.Kill()
38        self.dbg.DeleteTarget(target)
39
40        # Now load the corefile
41        target = self.dbg.CreateTarget('')
42        process = target.LoadCore(corefile)
43        thread = process.GetSelectedThread()
44        self.assertTrue(process.IsValid())
45        self.assertTrue(process.GetSelectedThread().IsValid())
46        if self.TraceOn():
47            self.runCmd("image list")
48            self.runCmd("bt")
49            self.runCmd("fr v")
50        num_modules = target.GetNumModules()
51        #  We should only have the a.out binary and possibly
52        # the libdyld.dylib.  Extra libraries loaded means
53        # extra LC_NOTE and unnecessarily large corefile.
54        self.assertTrue(num_modules == 1 or num_modules == 2)
55
56        # The heap variables should be unavailable now.
57        frame = thread.GetFrameAtIndex(0)
58        stack_int = frame.GetValueForVariablePath("stack_int")
59        heap_int = frame.GetValueForVariablePath("*heap_int")
60        stack_str = frame.GetValueForVariablePath("stack_str")
61        heap_str = frame.GetValueForVariablePath("heap_str")
62
63        ## The heap SBValues both come back as IsValid()==true,
64        ## which I'm not so sure is a great/correct thing --
65        ## it hides the memory read error that actually happened,
66        ## and we don't have a real value.
67        self.assertEqual(stack_int.GetValueAsUnsigned(), 5)
68        self.assertEqual(heap_int.GetValueAsUnsigned(), 0)
69        self.assertEqual(stack_str.summary, '"stack string"')
70        self.assertEqual(heap_str.summary, '""')
71