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"""
Test breakpoint conditions with 'breakpoint modify -c <expr> id'.
"""
import lldb
from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
from lldbsuite.test import lldbutil
class BreakpointConditionsTestCase(TestBase):
def test_breakpoint_condition_and_run_command(self):
"""Exercise breakpoint condition with 'breakpoint modify -c <expr> id'."""
self.build()
self.breakpoint_conditions()
def test_breakpoint_condition_inline_and_run_command(self):
"""Exercise breakpoint condition inline with 'breakpoint set'."""
self.build()
self.breakpoint_conditions(inline=True)
@add_test_categories(["pyapi"])
def test_breakpoint_condition_and_python_api(self):
"""Use Python APIs to set breakpoint conditions."""
self.build()
self.breakpoint_conditions_python()
@add_test_categories(["pyapi"])
def test_breakpoint_invalid_condition_and_python_api(self):
"""Use Python APIs to set breakpoint conditions."""
self.build()
self.breakpoint_invalid_conditions_python()
def setUp(self):
# Call super's setUp().
TestBase.setUp(self)
# Find the line number to of function 'c'.
self.line1 = line_number(
"main.c", '// Find the line number of function "c" here.'
)
self.line2 = line_number(
"main.c", "// Find the line number of c's parent call here."
)
def breakpoint_conditions(self, inline=False):
"""Exercise breakpoint condition with 'breakpoint modify -c <expr> id'."""
exe = self.getBuildArtifact("a.out")
self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
if inline:
# Create a breakpoint by function name 'c' and set the condition.
lldbutil.run_break_set_by_symbol(
self,
"c",
extra_options="-c 'val == 3'",
num_expected_locations=1,
sym_exact=True,
)
else:
# Create a breakpoint by function name 'c'.
lldbutil.run_break_set_by_symbol(
self, "c", num_expected_locations=1, sym_exact=True
)
# And set a condition on the breakpoint to stop on when 'val == 3'.
self.runCmd("breakpoint modify -c 'val == 3' 1")
# Now run the program.
self.runCmd("run", RUN_SUCCEEDED)
# The process should be stopped at this point.
self.expect("process status", PROCESS_STOPPED, patterns=["Process .* stopped"])
# 'frame variable --show-types val' should return 3 due to breakpoint condition.
self.expect(
"frame variable --show-types val",
VARIABLES_DISPLAYED_CORRECTLY,
startstr="(int) val = 3",
)
# Also check the hit count, which should be 3, by design.
self.expect(
"breakpoint list -f",
BREAKPOINT_HIT_ONCE,
substrs=["resolved = 1", "Condition: val == 3", "hit count = 1"],
)
# The frame #0 should correspond to main.c:36, the executable statement
# in function name 'c'. And the parent frame should point to
# main.c:24.
self.expect(
"thread backtrace",
STOPPED_DUE_TO_BREAKPOINT_CONDITION,
# substrs = ["stop reason = breakpoint"],
patterns=[
"frame #0.*main.c:%d" % self.line1,
"frame #1.*main.c:%d" % self.line2,
],
)
# Test that "breakpoint modify -c ''" clears the condition for the last
# created breakpoint, so that when the breakpoint hits, val == 1.
self.runCmd("process kill")
self.runCmd("breakpoint modify -c ''")
self.expect(
"breakpoint list -f",
BREAKPOINT_STATE_CORRECT,
matching=False,
substrs=["Condition:"],
)
# Now run the program again.
self.runCmd("run", RUN_SUCCEEDED)
# The process should be stopped at this point.
self.expect("process status", PROCESS_STOPPED, patterns=["Process .* stopped"])
# 'frame variable --show-types val' should return 1 since it is the first breakpoint hit.
self.expect(
"frame variable --show-types val",
VARIABLES_DISPLAYED_CORRECTLY,
startstr="(int) val = 1",
)
self.runCmd("process kill")
def breakpoint_conditions_python(self):
"""Use Python APIs to set breakpoint conditions."""
target = self.createTestTarget()
# Now create a breakpoint on main.c by name 'c'.
breakpoint = target.BreakpointCreateByName("c", "a.out")
self.trace("breakpoint:", breakpoint)
self.assertTrue(
breakpoint and breakpoint.GetNumLocations() == 1, VALID_BREAKPOINT
)
# We didn't associate a thread index with the breakpoint, so it should
# be invalid.
self.assertEqual(
breakpoint.GetThreadIndex(),
lldb.UINT32_MAX,
"The thread index should be invalid",
)
# The thread name should be invalid, too.
self.assertTrue(
breakpoint.GetThreadName() is None, "The thread name should be invalid"
)
# Let's set the thread index for this breakpoint and verify that it is,
# indeed, being set correctly.
# There's only one thread for the process.
breakpoint.SetThreadIndex(1)
self.assertEqual(
breakpoint.GetThreadIndex(), 1, "The thread index has been set correctly"
)
# Get the breakpoint location from breakpoint after we verified that,
# indeed, it has one location.
location = breakpoint.GetLocationAtIndex(0)
self.assertTrue(location and location.IsEnabled(), VALID_BREAKPOINT_LOCATION)
# Set the condition on the breakpoint location.
location.SetCondition("val == 3")
self.expect(location.GetCondition(), exe=False, startstr="val == 3")
# Now launch the process, and do not stop at entry point.
process = target.LaunchSimple(None, None, self.get_process_working_directory())
self.assertTrue(process, PROCESS_IS_VALID)
# Frame #0 should be on self.line1 and the break condition should hold.
from lldbsuite.test.lldbutil import get_stopped_thread
thread = get_stopped_thread(process, lldb.eStopReasonBreakpoint)
self.assertTrue(
thread.IsValid(),
"There should be a thread stopped due to breakpoint condition",
)
frame0 = thread.GetFrameAtIndex(0)
var = frame0.FindValue("val", lldb.eValueTypeVariableArgument)
self.assertTrue(
frame0.GetLineEntry().GetLine() == self.line1 and var.GetValue() == "3"
)
# The hit count for the breakpoint should be 1.
self.assertEqual(breakpoint.GetHitCount(), 1)
# Test that the condition expression didn't create a result variable:
options = lldb.SBExpressionOptions()
value = frame0.EvaluateExpression("$0", options)
self.assertTrue(
value.GetError().Fail(), "Conditions should not make result variables."
)
process.Continue()
def breakpoint_invalid_conditions_python(self):
"""Use Python APIs to set breakpoint conditions."""
exe = self.getBuildArtifact("a.out")
# Create a target by the debugger.
target = self.dbg.CreateTarget(exe)
self.assertTrue(target, VALID_TARGET)
# Now create a breakpoint on main.c by name 'c'.
breakpoint = target.BreakpointCreateByName("c", "a.out")
self.trace("breakpoint:", breakpoint)
self.assertTrue(
breakpoint and breakpoint.GetNumLocations() == 1, VALID_BREAKPOINT
)
# Set the condition on the breakpoint.
breakpoint.SetCondition("no_such_variable == not_this_one_either")
self.expect(
breakpoint.GetCondition(),
exe=False,
startstr="no_such_variable == not_this_one_either",
)
# Now launch the process, and do not stop at entry point.
process = target.LaunchSimple(None, None, self.get_process_working_directory())
self.assertTrue(process, PROCESS_IS_VALID)
# Frame #0 should be on self.line1 and the break condition should hold.
from lldbsuite.test.lldbutil import get_stopped_thread
thread = get_stopped_thread(process, lldb.eStopReasonBreakpoint)
self.assertTrue(
thread.IsValid(),
"There should be a thread stopped due to breakpoint condition",
)
frame0 = thread.GetFrameAtIndex(0)
var = frame0.FindValue("val", lldb.eValueTypeVariableArgument)
self.assertEqual(frame0.GetLineEntry().GetLine(), self.line1)
# The hit count for the breakpoint should be 1.
self.assertEqual(breakpoint.GetHitCount(), 1)
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