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"""
Test that a variable watchpoint should only hit when in scope.
"""
import lldb
from lldbsuite.test.lldbtest import *
import lldbsuite.test.lldbutil as lldbutil
from lldbsuite.test.decorators import *
class WatchedVariableHitWhenInScopeTestCase(TestBase):
NO_DEBUG_INFO_TESTCASE = True
# This test depends on not tracking watchpoint expression hits if we have
# left the watchpoint scope. We will provide such an ability at some point
# but the way this was done was incorrect, and it is unclear that for the
# most part that's not what folks mostly want, so we have to provide a
# clearer API to express this.
def setUp(self):
# Call super's setUp().
TestBase.setUp(self)
# Our simple source filename.
self.source = "main.c"
self.exe_name = self.testMethodName
self.d = {"C_SOURCES": self.source, "EXE": self.exe_name}
# Test hangs due to a kernel bug, see fdfeff0f in the linux kernel for details
@skipIfTargetAndroid(api_levels=list(range(25 + 1)), archs=["aarch64", "arm"])
@skipIf
def test_watched_var_should_only_hit_when_in_scope(self):
"""Test that a variable watchpoint should only hit when in scope."""
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 in main.
lldbutil.run_break_set_by_symbol(self, "main", 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 watchpoint for 'c.a'.
# There should be only one watchpoint hit (see main.c).
self.expect(
"watchpoint set variable c.a",
WATCHPOINT_CREATED,
substrs=["Watchpoint created", "size = 4", "type = w"],
)
# 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), but
# only once. The stop reason of the thread should be watchpoint.
self.expect(
"thread list",
STOPPED_DUE_TO_WATCHPOINT,
substrs=["stopped", "stop reason = watchpoint"],
)
self.runCmd("process continue")
# Don't expect the read of 'global' to trigger a stop exception.
# The process status should be 'exited'.
self.expect("process status", substrs=["exited"])
# 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"])
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