lldb/test/API/macosx/stack-corefile/TestStackCorefile.py

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