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"""
Test watchpoint size cases (1-byte, 2-byte, 4-byte).
Make sure we can watch all bytes, words or double words individually
when they are packed in a 8-byte region.
"""
from __future__ import print_function
import os, time
import lldb
from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
from lldbsuite.test import lldbutil
class WatchpointSizeTestCase(TestBase):
NO_DEBUG_INFO_TESTCASE = True
mydir = TestBase.compute_mydir(__file__)
def setUp(self):
# Call super's setUp().
TestBase.setUp(self)
# Source filename.
self.source = 'main.c'
# Output filename.
self.exe_name = 'a.out'
self.d = {'C_SOURCES': self.source, 'EXE': self.exe_name}
@expectedFailureAndroid(archs=['arm', 'aarch64']) # Watchpoints not supported
@expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr24446: WINDOWS XFAIL TRIAGE - Watchpoints not supported on Windows")
@expectedFailureAll(archs=['s390x']) # Read-write watchpoints not supported on SystemZ
def test_byte_size_watchpoints_with_byte_selection(self):
"""Test to selectively watch different bytes in a 8-byte array."""
self.run_watchpoint_size_test('byteArray', 8, '1')
@expectedFailureAndroid(archs=['arm', 'aarch64']) # Watchpoints not supported
@expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr24446: WINDOWS XFAIL TRIAGE - Watchpoints not supported on Windows")
@expectedFailureAll(archs=['s390x']) # Read-write watchpoints not supported on SystemZ
def test_two_byte_watchpoints_with_word_selection(self):
"""Test to selectively watch different words in an 8-byte word array."""
self.run_watchpoint_size_test('wordArray', 4, '2')
@expectedFailureAndroid(archs=['arm', 'aarch64']) # Watchpoints not supported
@expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr24446: WINDOWS XFAIL TRIAGE - Watchpoints not supported on Windows")
@expectedFailureAll(archs=['s390x']) # Read-write watchpoints not supported on SystemZ
def test_four_byte_watchpoints_with_dword_selection(self):
"""Test to selectively watch two double words in an 8-byte dword array."""
self.run_watchpoint_size_test('dwordArray', 2, '4')
def run_watchpoint_size_test(self, arrayName, array_size, watchsize):
self.build(dictionary=self.d)
self.setTearDownCleanup(dictionary=self.d)
exe = os.path.join(os.getcwd(), self.exe_name)
self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
# Detect line number after which we are going to increment arrayName.
loc_line = line_number('main.c', '// About to write ' + arrayName)
# Set a breakpoint on the line detected above.
lldbutil.run_break_set_by_file_and_line (self, "main.c",loc_line,
num_expected_locations=1, loc_exact=True)
# Run the program.
self.runCmd("run", RUN_SUCCEEDED)
for i in range(array_size):
# We should be stopped again due to the breakpoint.
# The stop reason of the thread should be breakpoint.
self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
substrs = ['stopped', 'stop reason = breakpoint'])
# Set a read_write type watchpoint arrayName
watch_loc=arrayName+"[" + str(i) + "]"
self.expect("watchpoint set variable -w read_write " + watch_loc,
WATCHPOINT_CREATED,
substrs = ['Watchpoint created', 'size = ' + watchsize, 'type = rw'])
# Use the '-v' option to do verbose listing of the watchpoint.
# The hit count should be 0 initially.
self.expect("watchpoint list -v", substrs = ['hit_count = 0'])
self.runCmd("process continue")
# We should be stopped due to the watchpoint.
# The stop reason of the thread should be watchpoint.
self.expect("thread list", STOPPED_DUE_TO_WATCHPOINT,
substrs = ['stopped', 'stop reason = watchpoint'])
# Use the '-v' option to do verbose listing of the watchpoint.
# The hit count should now be 1.
self.expect("watchpoint list -v",
substrs = ['hit_count = 1'])
self.runCmd("process continue")
# We should be stopped due to the watchpoint.
# The stop reason of the thread should be watchpoint.
self.expect("thread list", STOPPED_DUE_TO_WATCHPOINT,
substrs = ['stopped', 'stop reason = watchpoint'])
# Use the '-v' option to do verbose listing of the watchpoint.
# The hit count should now be 1.
# Verify hit_count has been updated after value has been read.
self.expect("watchpoint list -v",
substrs = ['hit_count = 2'])
# Delete the watchpoint immediately, but set auto-confirm to true first.
self.runCmd("settings set auto-confirm true")
self.expect("watchpoint delete", substrs = ['All watchpoints removed.'])
# Restore the original setting of auto-confirm.
self.runCmd("settings clear auto-confirm")
self.runCmd("process continue")
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