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"""
Use lldb Python SBTarget API to set read watchpoints
"""
import lldb
from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
from lldbsuite.test import lldbutil
class SetReadOnlyWatchpointTestCase(TestBase):
NO_DEBUG_INFO_TESTCASE = True
def setUp(self):
# Call super's setUp().
TestBase.setUp(self)
# Our simple source filename.
self.source = "main.c"
# Find the line number to break inside main().
self.line = line_number(self.source, "// Set break point at this line.")
self.build()
# Intel hardware does not support read-only watchpoints
@expectedFailureAll(archs=["i386", "x86_64"])
def test_read_watchpoint_watch_address(self):
exe = self.getBuildArtifact("a.out")
target = self.dbg.CreateTarget(exe)
self.assertTrue(target, VALID_TARGET)
# Now create a breakpoint on main.c.
breakpoint = target.BreakpointCreateByLocation(self.source, self.line)
self.assertTrue(
breakpoint and breakpoint.GetNumLocations() == 1, VALID_BREAKPOINT
)
# Now launch the process, and do not stop at the entry point.
process = target.LaunchSimple(None, None, self.get_process_working_directory())
# We should be stopped due to the breakpoint. Get frame #0.
process = target.GetProcess()
self.assertState(process.GetState(), lldb.eStateStopped, PROCESS_STOPPED)
thread = lldbutil.get_stopped_thread(process, lldb.eStopReasonBreakpoint)
frame0 = thread.GetFrameAtIndex(0)
value = frame0.FindValue("global", lldb.eValueTypeVariableGlobal)
local = frame0.FindValue("local", lldb.eValueTypeVariableLocal)
error = lldb.SBError()
watchpoint = target.WatchAddress(value.GetLoadAddress(), 1, True, False, error)
self.assertTrue(
value and local and watchpoint,
"Successfully found the values and set a watchpoint",
)
self.DebugSBValue(value)
self.DebugSBValue(local)
# Hide stdout if not running with '-t' option.
if not self.TraceOn():
self.HideStdout()
print(watchpoint)
# Continue. Expect the program to stop due to the variable being
# read, but *not* written to.
process.Continue()
if self.TraceOn():
lldbutil.print_stacktraces(process)
self.assertTrue(
local.GetValueAsSigned() > 0, "The local variable has been incremented"
)
# Intel hardware does not support read-only watchpoints
@expectedFailureAll(archs=["i386", "x86_64"])
def test_read_watchpoint_watch_create_by_address(self):
exe = self.getBuildArtifact("a.out")
target = self.dbg.CreateTarget(exe)
self.assertTrue(target, VALID_TARGET)
# Now create a breakpoint on main.c.
breakpoint = target.BreakpointCreateByLocation(self.source, self.line)
self.assertTrue(
breakpoint and breakpoint.GetNumLocations() == 1, VALID_BREAKPOINT
)
# Now launch the process, and do not stop at the entry point.
process = target.LaunchSimple(None, None, self.get_process_working_directory())
# We should be stopped due to the breakpoint. Get frame #0.
process = target.GetProcess()
self.assertState(process.GetState(), lldb.eStateStopped, PROCESS_STOPPED)
thread = lldbutil.get_stopped_thread(process, lldb.eStopReasonBreakpoint)
frame0 = thread.GetFrameAtIndex(0)
value = frame0.FindValue("global", lldb.eValueTypeVariableGlobal)
local = frame0.FindValue("local", lldb.eValueTypeVariableLocal)
error = lldb.SBError()
wp_opts = lldb.SBWatchpointOptions()
wp_opts.SetWatchpointTypeRead(True)
watchpoint = target.WatchpointCreateByAddress(
value.GetLoadAddress(), 1, wp_opts, error
)
self.assertTrue(
value and local and watchpoint,
"Successfully found the values and set a watchpoint",
)
self.DebugSBValue(value)
self.DebugSBValue(local)
# Hide stdout if not running with '-t' option.
if not self.TraceOn():
self.HideStdout()
print(watchpoint)
# Continue. Expect the program to stop due to the variable being
# read, but *not* written to.
process.Continue()
if self.TraceOn():
lldbutil.print_stacktraces(process)
self.assertTrue(
local.GetValueAsSigned() > 0, "The local variable has been incremented"
)
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