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"""
Test that a variable watchpoint should only hit when in scope.
"""
from __future__ import print_function
import unittest2
import os, time
import lldb
from lldbsuite.test.lldbtest import *
import lldbsuite.test.lldbutil as lldbutil
class WatchedVariableHitWhenInScopeTestCase(TestBase):
mydir = TestBase.compute_mydir(__file__)
#
# 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}
@unittest2.expectedFailure("rdar://problem/18685649")
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 = os.path.join(os.getcwd(), 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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