1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
"""
Use lldb Python SBTarget API to iterate on the watchpoint(s) for the target.
"""
from __future__ import print_function
import lldb
from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
from lldbsuite.test import lldbutil
class WatchpointIteratorTestCase(TestBase):
mydir = TestBase.compute_mydir(__file__)
NO_DEBUG_INFO_TESTCASE = True
# hardware watchpoints are not reported with a hardware index # on armv7 on ios devices
def affected_by_radar_34564183(self):
return (self.getArchitecture() in ['armv7', 'armv7k', 'arm64_32']) and self.platformIsDarwin()
def setUp(self):
# Call super's setUp().
TestBase.setUp(self)
# Our simple source filename.
self.source = 'main.c'
# Find the line number to break inside main().
self.line = line_number(
self.source, '// Set break point at this line.')
@add_test_categories(['pyapi'])
def test_watch_iter(self):
"""Exercise SBTarget.watchpoint_iter() API to iterate on the available watchpoints."""
self.build()
exe = self.getBuildArtifact("a.out")
# Create a target by the debugger.
target = self.dbg.CreateTarget(exe)
self.assertTrue(target, VALID_TARGET)
# Create a breakpoint on main.c in order to set our watchpoint later.
breakpoint = target.BreakpointCreateByLocation(self.source, self.line)
self.assertTrue(breakpoint and
breakpoint.GetNumLocations() == 1,
VALID_BREAKPOINT)
# Now launch the process, and do not stop at the entry point.
process = target.LaunchSimple(
None, None, self.get_process_working_directory())
# We should be stopped due to the breakpoint. Get frame #0.
process = target.GetProcess()
self.assertTrue(process.GetState() == lldb.eStateStopped,
PROCESS_STOPPED)
thread = lldbutil.get_stopped_thread(
process, lldb.eStopReasonBreakpoint)
frame0 = thread.GetFrameAtIndex(0)
# Watch 'global' for read and write.
value = frame0.FindValue('global', lldb.eValueTypeVariableGlobal)
error = lldb.SBError()
watchpoint = value.Watch(True, False, True, error)
self.assertTrue(value and watchpoint,
"Successfully found the variable and set a watchpoint")
self.DebugSBValue(value)
# Hide stdout if not running with '-t' option.
if not self.TraceOn():
self.HideStdout()
# There should be only 1 watchpoint location under the target.
self.assertTrue(target.GetNumWatchpoints() == 1)
self.assertTrue(watchpoint.IsEnabled())
watch_id = watchpoint.GetID()
self.assertTrue(watch_id != 0)
# Continue. Expect the program to stop due to the variable being
# written to.
process.Continue()
# Hide stdout if not running with '-t' option.
if not self.TraceOn():
self.HideStdout()
# Print the stack traces.
lldbutil.print_stacktraces(process)
thread = lldbutil.get_stopped_thread(
process, lldb.eStopReasonWatchpoint)
self.assertTrue(thread, "The thread stopped due to watchpoint")
self.DebugSBValue(value)
# We currently only support hardware watchpoint. Verify that we have a
# meaningful hardware index at this point. Exercise the printed repr of
# SBWatchpointLocation.
print(watchpoint)
if not self.affected_by_radar_34564183():
self.assertTrue(watchpoint.GetHardwareIndex() != -1)
# SBWatchpoint.GetDescription() takes a description level arg.
print(lldbutil.get_description(watchpoint, lldb.eDescriptionLevelFull))
# Now disable the 'rw' watchpoint. The program won't stop when it reads
# 'global' next.
watchpoint.SetEnabled(False)
self.assertTrue(watchpoint.GetHardwareIndex() == -1)
self.assertFalse(watchpoint.IsEnabled())
# Continue. The program does not stop again when the variable is being
# read from because the watchpoint location has been disabled.
process.Continue()
# At this point, the inferior process should have exited.
self.assertTrue(
process.GetState() == lldb.eStateExited,
PROCESS_EXITED)
# Verify some vital statistics and exercise the iterator API.
for watchpoint in target.watchpoint_iter():
self.assertTrue(watchpoint)
self.assertTrue(watchpoint.GetWatchSize() == 4)
self.assertTrue(watchpoint.GetHitCount() == 1)
print(watchpoint)