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"""
Test breakpoint conditions with 'breakpoint modify -c <expr> id'.
"""
from __future__ import print_function
import os, time
import re
import lldb
import lldbsuite.test.lldbutil as lldbutil
from lldbsuite.test.lldbtest import *
class BreakpointConditionsTestCase(TestBase):
mydir = TestBase.compute_mydir(__file__)
@skipIfWindows # Requires EE to support COFF on Windows (http://llvm.org/pr22232)
def test_breakpoint_condition_and_run_command(self):
"""Exercise breakpoint condition with 'breakpoint modify -c <expr> id'."""
self.build()
self.breakpoint_conditions()
@skipIfWindows # Requires EE to support COFF on Windows (http://llvm.org/pr22232)
def test_breakpoint_condition_inline_and_run_command(self):
"""Exercise breakpoint condition inline with 'breakpoint set'."""
self.build()
self.breakpoint_conditions(inline=True)
@skipIfWindows # Requires EE to support COFF on Windows (http://llvm.org/pr22232)
@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()
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 = os.path.join(os.getcwd(), "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")
self.runCmd("breakpoint disable")
self.runCmd("breakpoint set -p Loop")
arch = self.getArchitecture()
if arch in ['x86_64', 'i386']:
self.runCmd("breakpoint modify -c ($eax&&i)")
elif arch in ['aarch64']:
self.runCmd("breakpoint modify -c ($x1&&i)")
elif arch in ['arm']:
self.runCmd("breakpoint modify -c ($r0&&i)")
elif re.match("mips",arch):
self.runCmd("breakpoint modify -c ($r2&&i)")
self.runCmd("run")
self.expect("process status", PROCESS_STOPPED,
patterns = ['Process .* stopped'])
self.runCmd("continue")
self.expect("process status", PROCESS_EXITED,
patterns = ['Process .* exited'])
def breakpoint_conditions_python(self):
"""Use Python APIs to set breakpoint conditions."""
exe = os.path.join(os.getcwd(), "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')
#print("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.assertTrue(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.
breakpoint.SetThreadIndex(1) # There's only one thread for the process.
self.assertTrue(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.assertTrue(breakpoint.GetHitCount() == 1)
process.Continue()
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