lldb/test/API/commands/watchpoints/multi_watchpoint_slots/TestWatchpointMultipleSlots.py

   1 """
   2 Test watchpoint slots we should not be able to install multiple watchpoints
   3 within same word boundary. We should be able to install individual watchpoints
   4 on any of the bytes, half-word, or word. This is only for ARM/AArch64 targets.
   5 """
   6
   7
   8 import lldb
   9 from lldbsuite.test.decorators import *
  10 from lldbsuite.test.lldbtest import *
  11 from lldbsuite.test import lldbutil
  12
  13
  14 class WatchpointSlotsTestCase(TestBase):
  15     NO_DEBUG_INFO_TESTCASE = True
  16
  17     def setUp(self):
  18         # Call super's setUp().
  19         TestBase.setUp(self)
  20
  21         # Source filename.
  22         self.source = "main.c"
  23
  24         # Output filename.
  25         self.exe_name = self.getBuildArtifact("a.out")
  26         self.d = {"C_SOURCES": self.source, "EXE": self.exe_name}
  27
  28     # This is a arm and aarch64 specific test case. No other architectures tested.
  29     @skipIf(archs=no_match(["arm", "aarch64"]))
  30     def test_multiple_watchpoints_on_same_word(self):
  31         self.build(dictionary=self.d)
  32         self.setTearDownCleanup(dictionary=self.d)
  33
  34         exe = self.getBuildArtifact(self.exe_name)
  35         self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
  36
  37         # Detect line number after which we are going to increment arrayName.
  38         loc_line = line_number("main.c", "// About to write byteArray")
  39
  40         # Set a breakpoint on the line detected above.
  41         lldbutil.run_break_set_by_file_and_line(
  42             self, "main.c", loc_line, num_expected_locations=1, loc_exact=True
  43         )
  44
  45         # Run the program.
  46         self.runCmd("run", RUN_SUCCEEDED)
  47
  48         # The stop reason of the thread should be breakpoint.
  49         self.expect(
  50             "thread list",
  51             STOPPED_DUE_TO_BREAKPOINT,
  52             substrs=["stopped", "stop reason = breakpoint"],
  53         )
  54
  55         # Delete breakpoint we just hit.
  56         self.expect("breakpoint delete 1", substrs=["1 breakpoints deleted"])
  57
  58         # Set a watchpoint at byteArray[0]
  59         self.expect(
  60             "watchpoint set variable byteArray[0]",
  61             WATCHPOINT_CREATED,
  62             substrs=["Watchpoint created", "size = 1"],
  63         )
  64
  65         # Use the '-v' option to do verbose listing of the watchpoint.
  66         # The hit count should be 0 initially.
  67         self.expect("watchpoint list -v 1", substrs=["hit_count = 0"])
  68
  69         # debugserver on ios doesn't give an error, it creates another watchpoint,
  70         # only expect errors on non-darwin platforms.
  71         if not self.platformIsDarwin():
  72             # Try setting a watchpoint at byteArray[1]
  73             self.expect(
  74                 "watchpoint set variable byteArray[1]",
  75                 error=True,
  76                 substrs=["Watchpoint creation failed"],
  77             )
  78
  79         self.runCmd("process continue")
  80
  81         # We should be stopped due to the watchpoint.
  82         # The stop reason of the thread should be watchpoint.
  83         self.expect(
  84             "thread list",
  85             STOPPED_DUE_TO_WATCHPOINT,
  86             substrs=["stopped", "stop reason = watchpoint 1"],
  87         )
  88
  89         # Delete the watchpoint we hit above successfully.
  90         self.expect("watchpoint delete 1", substrs=["1 watchpoints deleted"])
  91
  92         # Set a watchpoint at byteArray[3]
  93         self.expect(
  94             "watchpoint set variable byteArray[3]",
  95             WATCHPOINT_CREATED,
  96             substrs=["Watchpoint created", "size = 1"],
  97         )
  98
  99         # Resume inferior.
 100         self.runCmd("process continue")
 101
 102         # We should be stopped due to the watchpoint.
 103         # The stop reason of the thread should be watchpoint.
 104         if self.platformIsDarwin():
 105             # On darwin we'll hit byteArray[3] which is watchpoint 2
 106             self.expect(
 107                 "thread list",
 108                 STOPPED_DUE_TO_WATCHPOINT,
 109                 substrs=["stopped", "stop reason = watchpoint 2"],
 110             )
 111         else:
 112             self.expect(
 113                 "thread list",
 114                 STOPPED_DUE_TO_WATCHPOINT,
 115                 substrs=["stopped", "stop reason = watchpoint 3"],
 116             )
 117
 118         # Resume inferior.
 119         self.runCmd("process continue")