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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.
"""
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
def setUp(self):
# Call super's setUp().
TestBase.setUp(self)
# Source filename.
self.source = "main.c"
# Output filename.
self.exe_name = self.getBuildArtifact("a.out")
self.d = {"C_SOURCES": self.source, "EXE": self.exe_name}
# Read-write watchpoints not supported on SystemZ
@expectedFailureAll(archs=["s390x"])
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")
# Read-write watchpoints not supported on SystemZ
@expectedFailureAll(archs=["s390x"])
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")
# Read-write watchpoints not supported on SystemZ
@expectedFailureAll(archs=["s390x"])
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 = self.getBuildArtifact(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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