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| """
Test SBThread APIs.
"""
from __future__ import print_function
import lldb
from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
from lldbsuite.test import lldbutil
from lldbsuite.test.lldbutil import get_stopped_thread, get_caller_symbol
class ThreadAPITestCase(TestBase):
mydir = TestBase.compute_mydir(__file__)
@add_test_categories(['pyapi'])
def test_get_process(self):
"""Test Python SBThread.GetProcess() API."""
self.build()
self.get_process()
@add_test_categories(['pyapi'])
def test_get_stop_description(self):
"""Test Python SBThread.GetStopDescription() API."""
self.build()
self.get_stop_description()
@add_test_categories(['pyapi'])
def test_run_to_address(self):
"""Test Python SBThread.RunToAddress() API."""
# We build a different executable than the default build() does.
d = {'CXX_SOURCES': 'main2.cpp', 'EXE': self.exe_name}
self.build(dictionary=d)
self.setTearDownCleanup(dictionary=d)
self.run_to_address(self.exe_name)
@add_test_categories(['pyapi'])
@expectedFailureAll(oslist=['freebsd'], bugnumber='llvm.org/pr20476')
@expectedFailureAll(oslist=["windows"])
@expectedFailureNetBSD
def test_step_out_of_malloc_into_function_b(self):
"""Test Python SBThread.StepOut() API to step out of a malloc call where the call site is at function b()."""
# We build a different executable than the default build() does.
d = {'CXX_SOURCES': 'main2.cpp', 'EXE': self.exe_name}
self.build(dictionary=d)
self.setTearDownCleanup(dictionary=d)
self.step_out_of_malloc_into_function_b(self.exe_name)
@add_test_categories(['pyapi'])
def test_step_over_3_times(self):
"""Test Python SBThread.StepOver() API."""
# We build a different executable than the default build() does.
d = {'CXX_SOURCES': 'main2.cpp', 'EXE': self.exe_name}
self.build(dictionary=d)
self.setTearDownCleanup(dictionary=d)
self.step_over_3_times(self.exe_name)
def setUp(self):
# Call super's setUp().
TestBase.setUp(self)
# Find the line number within main.cpp to break inside main().
self.break_line = line_number(
"main.cpp", "// Set break point at this line and check variable 'my_char'.")
# Find the line numbers within main2.cpp for
# step_out_of_malloc_into_function_b() and step_over_3_times().
self.step_out_of_malloc = line_number(
"main2.cpp", "// thread step-out of malloc into function b.")
self.after_3_step_overs = line_number(
"main2.cpp", "// we should reach here after 3 step-over's.")
# We'll use the test method name as the exe_name for executable
# comppiled from main2.cpp.
self.exe_name = self.testMethodName
def get_process(self):
"""Test Python SBThread.GetProcess() API."""
exe = self.getBuildArtifact("a.out")
target = self.dbg.CreateTarget(exe)
self.assertTrue(target, VALID_TARGET)
breakpoint = target.BreakpointCreateByLocation(
"main.cpp", self.break_line)
self.assertTrue(breakpoint, VALID_BREAKPOINT)
self.runCmd("breakpoint list")
# Launch the process, and do not stop at the entry point.
process = target.LaunchSimple(
None, None, self.get_process_working_directory())
thread = get_stopped_thread(process, lldb.eStopReasonBreakpoint)
self.assertTrue(
thread.IsValid(),
"There should be a thread stopped due to breakpoint")
self.runCmd("process status")
proc_of_thread = thread.GetProcess()
#print("proc_of_thread:", proc_of_thread)
self.assertTrue(proc_of_thread.GetProcessID()
== process.GetProcessID())
def get_stop_description(self):
"""Test Python SBThread.GetStopDescription() API."""
exe = self.getBuildArtifact("a.out")
target = self.dbg.CreateTarget(exe)
self.assertTrue(target, VALID_TARGET)
breakpoint = target.BreakpointCreateByLocation(
"main.cpp", self.break_line)
self.assertTrue(breakpoint, VALID_BREAKPOINT)
#self.runCmd("breakpoint list")
# Launch the process, and do not stop at the entry point.
process = target.LaunchSimple(
None, None, self.get_process_working_directory())
thread = get_stopped_thread(process, lldb.eStopReasonBreakpoint)
self.assertTrue(
thread.IsValid(),
"There should be a thread stopped due to breakpoint")
#self.runCmd("process status")
# Due to the typemap magic (see lldb.swig), we pass in an (int)length to GetStopDescription
# and expect to get a Python string as the return object!
# The 100 is just an arbitrary number specifying the buffer size.
stop_description = thread.GetStopDescription(100)
self.expect(stop_description, exe=False,
startstr='breakpoint')
def step_out_of_malloc_into_function_b(self, exe_name):
"""Test Python SBThread.StepOut() API to step out of a malloc call where the call site is at function b()."""
exe = self.getBuildArtifact(exe_name)
target = self.dbg.CreateTarget(exe)
self.assertTrue(target, VALID_TARGET)
breakpoint = target.BreakpointCreateByName('malloc')
self.assertTrue(breakpoint, VALID_BREAKPOINT)
# Launch the process, and do not stop at the entry point.
process = target.LaunchSimple(
None, None, self.get_process_working_directory())
while True:
thread = get_stopped_thread(process, lldb.eStopReasonBreakpoint)
self.assertTrue(
thread.IsValid(),
"There should be a thread stopped due to breakpoint")
caller_symbol = get_caller_symbol(thread)
if not caller_symbol:
self.fail(
"Test failed: could not locate the caller symbol of malloc")
# Our top frame may be an inlined function in malloc() (e.g., on
# FreeBSD). Apply a simple heuristic of stepping out until we find
# a non-malloc caller
while caller_symbol.startswith("malloc"):
thread.StepOut()
self.assertTrue(thread.IsValid(),
"Thread valid after stepping to outer malloc")
caller_symbol = get_caller_symbol(thread)
if caller_symbol == "b(int)":
break
process.Continue()
# On Linux malloc calls itself in some case. Remove the breakpoint because we don't want
# to hit it during step-out.
target.BreakpointDelete(breakpoint.GetID())
thread.StepOut()
self.runCmd("thread backtrace")
self.assertTrue(
thread.GetFrameAtIndex(0).GetLineEntry().GetLine() == self.step_out_of_malloc,
"step out of malloc into function b is successful")
def step_over_3_times(self, exe_name):
"""Test Python SBThread.StepOver() API."""
exe = self.getBuildArtifact(exe_name)
target = self.dbg.CreateTarget(exe)
self.assertTrue(target, VALID_TARGET)
breakpoint = target.BreakpointCreateByLocation(
'main2.cpp', self.step_out_of_malloc)
self.assertTrue(breakpoint, VALID_BREAKPOINT)
self.runCmd("breakpoint list")
# Launch the process, and do not stop at the entry point.
process = target.LaunchSimple(
None, None, self.get_process_working_directory())
self.assertTrue(process, PROCESS_IS_VALID)
# Frame #0 should be on self.step_out_of_malloc.
self.assertTrue(process.GetState() == lldb.eStateStopped)
thread = get_stopped_thread(process, lldb.eStopReasonBreakpoint)
self.assertTrue(
thread.IsValid(),
"There should be a thread stopped due to breakpoint condition")
self.runCmd("thread backtrace")
frame0 = thread.GetFrameAtIndex(0)
lineEntry = frame0.GetLineEntry()
self.assertTrue(lineEntry.GetLine() == self.step_out_of_malloc)
thread.StepOver()
thread.StepOver()
thread.StepOver()
self.runCmd("thread backtrace")
# Verify that we are stopped at the correct source line number in
# main2.cpp.
frame0 = thread.GetFrameAtIndex(0)
lineEntry = frame0.GetLineEntry()
self.assertTrue(thread.GetStopReason() == lldb.eStopReasonPlanComplete)
# Expected failure with clang as the compiler.
# rdar://problem/9223880
#
# Which has been fixed on the lldb by compensating for inaccurate line
# table information with r140416.
self.assertTrue(lineEntry.GetLine() == self.after_3_step_overs)
def run_to_address(self, exe_name):
"""Test Python SBThread.RunToAddress() API."""
exe = self.getBuildArtifact(exe_name)
target = self.dbg.CreateTarget(exe)
self.assertTrue(target, VALID_TARGET)
breakpoint = target.BreakpointCreateByLocation(
'main2.cpp', self.step_out_of_malloc)
self.assertTrue(breakpoint, VALID_BREAKPOINT)
self.runCmd("breakpoint list")
# Launch the process, and do not stop at the entry point.
process = target.LaunchSimple(
None, None, self.get_process_working_directory())
self.assertTrue(process, PROCESS_IS_VALID)
# Frame #0 should be on self.step_out_of_malloc.
self.assertTrue(process.GetState() == lldb.eStateStopped)
thread = get_stopped_thread(process, lldb.eStopReasonBreakpoint)
self.assertTrue(
thread.IsValid(),
"There should be a thread stopped due to breakpoint condition")
self.runCmd("thread backtrace")
frame0 = thread.GetFrameAtIndex(0)
lineEntry = frame0.GetLineEntry()
self.assertTrue(lineEntry.GetLine() == self.step_out_of_malloc)
# Get the start/end addresses for this line entry.
start_addr = lineEntry.GetStartAddress().GetLoadAddress(target)
end_addr = lineEntry.GetEndAddress().GetLoadAddress(target)
if self.TraceOn():
print("start addr:", hex(start_addr))
print("end addr:", hex(end_addr))
# Disable the breakpoint.
self.assertTrue(target.DisableAllBreakpoints())
self.runCmd("breakpoint list")
thread.StepOver()
thread.StepOver()
thread.StepOver()
self.runCmd("thread backtrace")
# Now ask SBThread to run to the address 'start_addr' we got earlier, which
# corresponds to self.step_out_of_malloc line entry's start address.
thread.RunToAddress(start_addr)
self.runCmd("process status")
#self.runCmd("thread backtrace")
|