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"""
Test 'watchpoint command'.
"""
import lldb
from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
from lldbsuite.test import lldbutil
class WatchpointLLDBCommandTestCase(TestBase):
NO_DEBUG_INFO_TESTCASE = True
def setUp(self):
# Call super's setUp().
TestBase.setUp(self)
# Our simple source filename.
self.source = "main.cpp"
# Find the line number to break inside main().
self.line = line_number(self.source, "// Set break point at this line.")
# And the watchpoint variable declaration line number.
self.decl = line_number(self.source, "// Watchpoint variable declaration.")
# Build dictionary to have unique executable names for each test
# method.
self.exe_name = "a%d.out" % self.test_number
self.d = {"CXX_SOURCES": self.source, "EXE": self.exe_name}
def test_watchpoint_command(self):
"""Test 'watchpoint command'."""
self.build(dictionary=self.d)
self.setTearDownCleanup(dictionary=self.d)
exe = self.getBuildArtifact(self.exe_name)
self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
# Add a breakpoint to set a watchpoint when stopped on the breakpoint.
lldbutil.run_break_set_by_file_and_line(
self, None, self.line, num_expected_locations=1
)
# Run the program.
self.runCmd("run", RUN_SUCCEEDED)
# 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"],
)
# Now let's set a write-type watchpoint for 'global'.
self.expect(
"watchpoint set variable -w write global",
WATCHPOINT_CREATED,
substrs=[
"Watchpoint created",
"size = 4",
"type = w",
"%s:%d" % (self.source, self.decl),
],
)
self.runCmd('watchpoint command add 1 -o "expr -- cookie = 777"')
# List the watchpoint command we just added.
self.expect("watchpoint command list 1", substrs=["expr -- cookie = 777"])
# 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 again due to the watchpoint (write type).
# The stop reason of the thread should be watchpoint.
self.expect(
"thread backtrace",
STOPPED_DUE_TO_WATCHPOINT,
substrs=["stop reason = watchpoint"],
)
# Check that the watchpoint snapshoting mechanism is working.
self.expect(
"watchpoint list -v",
substrs=[
"old value: 0",
"new value: 1",
"hit_count = 1",
"ignore_count = 0",
],
)
# The watchpoint command "forced" our global variable 'cookie' to
# become 777.
self.expect(
"frame variable --show-globals cookie",
substrs=["(int32_t)", "cookie = 777"],
)
def test_watchpoint_command_can_disable_a_watchpoint(self):
"""Test that 'watchpoint command' action can disable a watchpoint after it is triggered."""
self.build(dictionary=self.d)
self.setTearDownCleanup(dictionary=self.d)
exe = self.getBuildArtifact(self.exe_name)
self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
# Add a breakpoint to set a watchpoint when stopped on the breakpoint.
lldbutil.run_break_set_by_file_and_line(
self, None, self.line, num_expected_locations=1
)
# Run the program.
self.runCmd("run", RUN_SUCCEEDED)
# 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"],
)
# Now let's set a write-type watchpoint for 'global'.
self.expect(
"watchpoint set variable -w write global",
WATCHPOINT_CREATED,
substrs=[
"Watchpoint created",
"size = 4",
"type = w",
"%s:%d" % (self.source, self.decl),
],
)
self.runCmd('watchpoint command add 1 -o "watchpoint disable 1"')
# List the watchpoint command we just added.
self.expect("watchpoint command list 1", substrs=["watchpoint disable 1"])
# 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 again due to the watchpoint (write type).
# The stop reason of the thread should be watchpoint.
self.expect(
"thread backtrace",
STOPPED_DUE_TO_WATCHPOINT,
substrs=["stop reason = watchpoint"],
)
# Check that the watchpoint has been disabled.
self.expect("watchpoint list -v", substrs=["disabled"])
self.runCmd("process continue")
# There should be no more watchpoint hit and the process status should
# be 'exited'.
self.expect("process status", substrs=["exited"])
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