lldb/test/API/commands/watchpoints/unaligned-watchpoint/TestUnalignedWatchpoint.py

   1 """
   2 Watch one byte in the middle of a doubleword, mutate the
   3 entire doubleword including the watched byte.  On AArch64
   4 the trap address is probably the start of the doubleword,
   5 instead of the address of our watched byte.  Test that lldb
   6 correctly associates this watchpoint trap with our watchpoint.
   7 """
   8
   9
  10 import lldb
  11 from lldbsuite.test.decorators import *
  12 from lldbsuite.test.lldbtest import *
  13 from lldbsuite.test import lldbutil
  14
  15
  16 class UnalignedWatchpointTestCase(TestBase):
  17     NO_DEBUG_INFO_TESTCASE = True
  18
  19     @skipIfOutOfTreeDebugserver
  20     def test_unaligned_watchpoint(self):
  21         """Test an unaligned watchpoint triggered by a larger aligned write."""
  22         self.build()
  23         self.main_source_file = lldb.SBFileSpec("main.c")
  24         (target, process, thread, bkpt) = lldbutil.run_to_source_breakpoint(
  25             self, "break here", self.main_source_file
  26         )
  27
  28         frame = thread.GetFrameAtIndex(0)
  29
  30         self.expect("watchpoint set variable a.buf[2]")
  31
  32         self.runCmd("process continue")
  33
  34         # We should be stopped again due to the watchpoint (write type), but
  35         # only once.  The stop reason of the thread should be watchpoint.
  36         self.expect(
  37             "thread list",
  38             STOPPED_DUE_TO_WATCHPOINT,
  39             substrs=["stopped", "stop reason = watchpoint"],
  40         )
  41
  42         # Use the '-v' option to do verbose listing of the watchpoint.
  43         # The hit count should now be 1.
  44         self.expect("watchpoint list -v", substrs=["hit_count = 1"])
  45
  46         self.runCmd("process continue")
  47
  48         # We should be stopped again due to the watchpoint (write type), but
  49         # only once.  The stop reason of the thread should be watchpoint.
  50         self.expect(
  51             "thread list",
  52             STOPPED_DUE_TO_WATCHPOINT,
  53             substrs=["stopped", "stop reason = watchpoint"],
  54         )
  55
  56         # Use the '-v' option to do verbose listing of the watchpoint.
  57         # The hit count should now be 1.
  58         self.expect("watchpoint list -v", substrs=["hit_count = 2"])