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LLDB module which provides the abstract base class of lldb test case.
The concrete subclass can override lldbtest.TestBase in order to inherit the
common behavior for unitest.TestCase.setUp/tearDown implemented in this file.
./ provides a test driver which sets up the environment to run the
entire of part of the test suite . Example:
# Exercises the test suite in the types directory....
/Volumes/data/lldb/svn/ToT/test $ ./ -A x86_64 types
Session logs for test failures/errors/unexpected successes will go into directory '2012-05-16-13_35_42'
Command invoked: python ./ -A x86_64 types
Configuration: arch=x86_64 compiler=clang
Collected 72 tests
Ran 72 tests in 135.468s
from __future__ import absolute_import
from __future__ import print_function
# System modules
import abc
from distutils.version import LooseVersion
from functools import wraps
import gc
import glob
import io
import json
import os.path
import re
import shutil
import signal
from subprocess import *
import sys
import time
import traceback
# Third-party modules
import unittest2
# LLDB modules
import lldb
from . import configuration
from . import decorators
from . import lldbplatformutil
from . import lldbtest_config
from . import lldbutil
from . import test_categories
from import encoded_file
from import funcutils
from import seven
from import get_builder
from lldbsuite.test_event import build_exception
# See also dotest.parseOptionsAndInitTestdirs(), where the environment variables
# LLDB_COMMAND_TRACE is set from '-t' option.
# By default, traceAlways is False.
if "LLDB_COMMAND_TRACE" in os.environ and os.environ[
traceAlways = True
traceAlways = False
# By default, doCleanup is True.
if "LLDB_DO_CLEANUP" in os.environ and os.environ["LLDB_DO_CLEANUP"] == "NO":
doCleanup = False
doCleanup = True
# Some commonly used assert messages.
COMMAND_FAILED_AS_EXPECTED = "Command has failed as expected"
CURRENT_EXECUTABLE_SET = "Current executable set successfully"
PROCESS_IS_VALID = "Process is valid"
PROCESS_KILLED = "Process is killed successfully"
PROCESS_EXITED = "Process exited successfully"
PROCESS_STOPPED = "Process status should be stopped"
RUN_SUCCEEDED = "Process is launched successfully"
RUN_COMPLETED = "Process exited successfully"
BACKTRACE_DISPLAYED_CORRECTLY = "Backtrace displayed correctly"
BREAKPOINT_CREATED = "Breakpoint created successfully"
BREAKPOINT_STATE_CORRECT = "Breakpoint state is correct"
BREAKPOINT_PENDING_CREATED = "Pending breakpoint created successfully"
BREAKPOINT_HIT_ONCE = "Breakpoint resolved with hit count = 1"
BREAKPOINT_HIT_TWICE = "Breakpoint resolved with hit count = 2"
BREAKPOINT_HIT_THRICE = "Breakpoint resolved with hit count = 3"
MISSING_EXPECTED_REGISTERS = "At least one expected register is unavailable."
OBJECT_PRINTED_CORRECTLY = "Object printed correctly"
SOURCE_DISPLAYED_CORRECTLY = "Source code displayed correctly"
STEP_IN_SUCCEEDED = "Thread step-in succeeded"
STEP_OUT_SUCCEEDED = "Thread step-out succeeded"
STOPPED_DUE_TO_EXC_BAD_ACCESS = "Process should be stopped due to bad access exception"
STOPPED_DUE_TO_ASSERT = "Process should be stopped due to an assertion"
STOPPED_DUE_TO_BREAKPOINT = "Process should be stopped due to breakpoint"
STOPPED_DUE_TO_BREAKPOINT, "instead, the actual stop reason is: '%s'")
STOPPED_DUE_TO_BREAKPOINT_CONDITION = "Stopped due to breakpoint condition"
STOPPED_DUE_TO_BREAKPOINT_IGNORE_COUNT = "Stopped due to breakpoint and ignore count"
STOPPED_DUE_TO_BREAKPOINT_JITTED_CONDITION = "Stopped due to breakpoint jitted condition"
STOPPED_DUE_TO_SIGNAL = "Process state is stopped due to signal"
STOPPED_DUE_TO_STEP_IN = "Process state is stopped due to step in"
STOPPED_DUE_TO_WATCHPOINT = "Process should be stopped due to watchpoint"
DATA_TYPES_DISPLAYED_CORRECTLY = "Data type(s) displayed correctly"
VALID_BREAKPOINT = "Got a valid breakpoint"
VALID_BREAKPOINT_LOCATION = "Got a valid breakpoint location"
VALID_COMMAND_INTERPRETER = "Got a valid command interpreter"
VALID_FILESPEC = "Got a valid filespec"
VALID_MODULE = "Got a valid module"
VALID_PROCESS = "Got a valid process"
VALID_SYMBOL = "Got a valid symbol"
VALID_TARGET = "Got a valid target"
VALID_PLATFORM = "Got a valid platform"
VALID_TYPE = "Got a valid type"
VALID_VARIABLE = "Got a valid variable"
VARIABLES_DISPLAYED_CORRECTLY = "Variable(s) displayed correctly"
WATCHPOINT_CREATED = "Watchpoint created successfully"
def CMD_MSG(str):
'''A generic "Command '%s' did not return successfully" message generator.'''
return "Command '%s' did not return successfully" % str
def COMPLETION_MSG(str_before, str_after, completions):
'''A generic assertion failed message generator for the completion mechanism.'''
return ("'%s' successfully completes to '%s', but completions were:\n%s"
% (str_before, str_after, "\n".join(completions)))
def EXP_MSG(str, actual, exe):
'''A generic "'%s' returned unexpected result" message generator if exe.
Otherwise, it generates "'%s' does not match expected result" message.'''
return "'%s' %s result, got '%s'" % (
str, 'returned unexpected' if exe else 'does not match expected', actual.strip())
def SETTING_MSG(setting):
'''A generic "Value of setting '%s' is not correct" message generator.'''
return "Value of setting '%s' is not correct" % setting
def line_number(filename, string_to_match):
"""Helper function to return the line number of the first matched string."""
with, mode='r', encoding="utf-8") as f:
for i, line in enumerate(f):
if line.find(string_to_match) != -1:
# Found our match.
return i + 1
raise Exception(
"Unable to find '%s' within file %s" %
(string_to_match, filename))
def get_line(filename, line_number):
"""Return the text of the line at the 1-based line number."""
with, mode='r', encoding="utf-8") as f:
return f.readlines()[line_number - 1]
def pointer_size():
"""Return the pointer size of the host system."""
import ctypes
a_pointer = ctypes.c_void_p(0xffff)
return 8 * ctypes.sizeof(a_pointer)
def is_exe(fpath):
"""Returns true if fpath is an executable."""
if fpath == None:
return False
if sys.platform == 'win32':
if not fpath.endswith(".exe"):
fpath += ".exe"
return os.path.isfile(fpath) and os.access(fpath, os.X_OK)
def which(program):
"""Returns the full path to a program; None otherwise."""
fpath, fname = os.path.split(program)
if fpath:
if is_exe(program):
return program
for path in os.environ["PATH"].split(os.pathsep):
exe_file = os.path.join(path, program)
if is_exe(exe_file):
return exe_file
return None
class ValueCheck:
def __init__(self, name=None, value=None, type=None, summary=None,
children=None, dereference=None):
:param name: The name that the SBValue should have. None if the summary
should not be checked.
:param summary: The summary that the SBValue should have. None if the
summary should not be checked.
:param value: The value that the SBValue should have. None if the value
should not be checked.
:param type: The type that the SBValue result should have. None if the
type should not be checked.
:param children: A list of ValueChecks that need to match the children
of this SBValue. None if children shouldn't be checked.
The order of checks is the order of the checks in the
list. The number of checks has to match the number of
:param dereference: A ValueCheck for the SBValue returned by the
`Dereference` function.
self.expect_name = name
self.expect_value = value
self.expect_type = type
self.expect_summary = summary
self.children = children
self.dereference = dereference
def check_value(self, test_base, val, error_msg=None):
Checks that the given value matches the currently set properties
of this ValueCheck. If a match failed, the given TestBase will
be used to emit an error. A custom error message can be specified
that will be used to describe failed check for this SBValue (but
not errors in the child values).
this_error_msg = error_msg if error_msg else ""
this_error_msg += "\nChecking SBValue: " + str(val)
# Python 3.6 doesn't declare a `re.Pattern` type, get the dynamic type.
pattern_type = type(re.compile(''))
if self.expect_name:
test_base.assertEqual(self.expect_name, val.GetName(),
if self.expect_value:
if isinstance(self.expect_value, pattern_type):
test_base.assertRegex(val.GetValue(), self.expect_value,
test_base.assertEqual(self.expect_value, val.GetValue(),
if self.expect_type:
test_base.assertEqual(self.expect_type, val.GetDisplayTypeName(),
if self.expect_summary:
if isinstance(self.expect_summary, pattern_type):
test_base.assertRegex(val.GetSummary(), self.expect_summary,
test_base.assertEqual(self.expect_summary, val.GetSummary(),
if self.children is not None:
self.check_value_children(test_base, val, error_msg)
if self.dereference is not None:
self.dereference.check_value(test_base, val.Dereference(), error_msg)
def check_value_children(self, test_base, val, error_msg=None):
Checks that the children of a SBValue match a certain structure and
have certain properties.
:param test_base: The current test's TestBase object.
:param val: The SBValue to check.
this_error_msg = error_msg if error_msg else ""
this_error_msg += "\nChecking SBValue: " + str(val)
test_base.assertEqual(len(self.children), val.GetNumChildren(), this_error_msg)
for i in range(0, val.GetNumChildren()):
expected_child = self.children[i]
actual_child = val.GetChildAtIndex(i)
child_error = "Checking child with index " + str(i) + ":\n" + error_msg
expected_child.check_value(test_base, actual_child, child_error)
class recording(io.StringIO):
A nice little context manager for recording the debugger interactions into
our session object. If trace flag is ON, it also emits the interactions
into the stderr.
def __init__(self, test, trace):
"""Create a io.StringIO instance; record the session obj and trace flag."""
# The test might not have undergone the 'setUp(self)' phase yet, so that
# the attribute 'session' might not even exist yet.
self.session = getattr(test, "session", None) if test else None
self.trace = trace
def __enter__(self):
Context management protocol on entry to the body of the with statement.
Just return the io.StringIO object.
return self
def __exit__(self, type, value, tb):
Context management protocol on exit from the body of the with statement.
If trace is ON, it emits the recordings into stderr. Always add the
recordings to our session object. And close the io.StringIO object, too.
if self.trace:
print(self.getvalue(), file=sys.stderr)
if self.session:
print(self.getvalue(), file=self.session)
class _BaseProcess(object, metaclass=abc.ABCMeta):
def pid(self):
"""Returns process PID if has been launched already."""
def launch(self, executable, args, extra_env):
"""Launches new process with given executable and args."""
def terminate(self):
"""Terminates previously launched process.."""
class _LocalProcess(_BaseProcess):
def __init__(self, trace_on):
self._proc = None
self._trace_on = trace_on
self._delayafterterminate = 0.1
def pid(self):
def launch(self, executable, args, extra_env):
if extra_env:
env = dict(os.environ)
env.update([kv.split("=", 1) for kv in extra_env])
self._proc = Popen(
[executable] + args,
os.devnull) if not self._trace_on else None,
def terminate(self):
if self._proc.poll() is None:
# Terminate _proc like it does the pexpect
signals_to_try = [
sig for sig in [
'SIGINT'] if sig in dir(signal)]
for sig in signals_to_try:
self._proc.send_signal(getattr(signal, sig))
if self._proc.poll() is not None:
except ValueError:
pass # Windows says SIGINT is not a valid signal to send
if self._proc.poll() is not None:
def poll(self):
return self._proc.poll()
def wait(self, timeout=None):
return self._proc.wait(timeout)
class _RemoteProcess(_BaseProcess):
def __init__(self, install_remote):
self._pid = None
self._install_remote = install_remote
def pid(self):
return self._pid
def launch(self, executable, args, extra_env):
if self._install_remote:
src_path = executable
dst_path = lldbutil.join_remote_paths(
lldb.remote_platform.GetWorkingDirectory(), os.path.basename(executable))
dst_file_spec = lldb.SBFileSpec(dst_path, False)
err = lldb.remote_platform.Install(
lldb.SBFileSpec(src_path, True), dst_file_spec)
if err.Fail():
raise Exception(
"remote_platform.Install('%s', '%s') failed: %s" %
(src_path, dst_path, err))
dst_path = executable
dst_file_spec = lldb.SBFileSpec(executable, False)
launch_info = lldb.SBLaunchInfo(args)
launch_info.SetExecutableFile(dst_file_spec, True)
# Redirect stdout and stderr to /dev/null
launch_info.AddSuppressFileAction(1, False, True)
launch_info.AddSuppressFileAction(2, False, True)
if extra_env:
launch_info.SetEnvironmentEntries(extra_env, True)
err = lldb.remote_platform.Launch(launch_info)
if err.Fail():
raise Exception(
"remote_platform.Launch('%s', '%s') failed: %s" %
(dst_path, args, err))
self._pid = launch_info.GetProcessID()
def terminate(self):
def getsource_if_available(obj):
Return the text of the source code for an object if available. Otherwise,
a print representation is returned.
import inspect
return inspect.getsource(obj)
return repr(obj)
def builder_module():
return get_builder(sys.platform)
class Base(unittest2.TestCase):
Abstract base for performing lldb (see TestBase) or other generic tests (see
BenchBase for one example). lldbtest.Base works with the test driver to
accomplish things.
# The concrete subclass should override this attribute.
mydir = None
# Keep track of the old current working directory.
oldcwd = None
def compute_mydir(test_file):
'''Subclasses should call this function to correctly calculate the
required "mydir" attribute as follows:
mydir = TestBase.compute_mydir(__file__)
# /abs/path/to/packages/group/subdir/ -> group/subdir
lldb_test_src = configuration.test_src_root
if not test_file.startswith(lldb_test_src):
raise Exception(
"Test file '%s' must reside within lldb_test_src "
"(which is '%s')." % (test_file, lldb_test_src))
return os.path.dirname(os.path.relpath(test_file, start=lldb_test_src))
def TraceOn(self):
"""Returns True if we are in trace mode (tracing detailed test execution)."""
return traceAlways
def trace(self, *args,**kwargs):
with recording(self, self.TraceOn()) as sbuf:
print(*args, file=sbuf, **kwargs)
def setUpClass(cls):
Python unittest framework class setup fixture.
Do current directory manipulation.
# Fail fast if 'mydir' attribute is not overridden.
if not cls.mydir:
cls.mydir = Base.compute_mydir(sys.modules[cls.__module__].__file__)
if not cls.mydir:
raise Exception("Subclasses must override the 'mydir' attribute.")
# Save old working directory.
cls.oldcwd = os.getcwd()
full_dir = os.path.join(configuration.test_src_root, cls.mydir)
if traceAlways:
print("Change dir to:", full_dir, file=sys.stderr)
# Set platform context.
cls.platformContext = lldbplatformutil.createPlatformContext()
def tearDownClass(cls):
Python unittest framework class teardown fixture.
Do class-wide cleanup.
if doCleanup:
# First, let's do the platform-specific cleanup.
module = builder_module()
# Subclass might have specific cleanup function defined.
if getattr(cls, "classCleanup", None):
if traceAlways:
"Call class-specific cleanup function for class:",
exc_type, exc_value, exc_tb = sys.exc_info()
traceback.print_exception(exc_type, exc_value, exc_tb)
# Restore old working directory.
if traceAlways:
print("Restore dir to:", cls.oldcwd, file=sys.stderr)
def enableLogChannelsForCurrentTest(self):
if len(lldbtest_config.channels) == 0:
# if debug channels are specified in lldbtest_config.channels,
# create a new set of log files for every test
log_basename = self.getLogBasenameForCurrentTest()
# confirm that the file is writeable
host_log_path = "{}-host.log".format(log_basename)
open(host_log_path, 'w').close()
log_enable = "log enable -Tpn -f {} ".format(host_log_path)
for channel_with_categories in lldbtest_config.channels:
channel_then_categories = channel_with_categories.split(' ', 1)
channel = channel_then_categories[0]
if len(channel_then_categories) > 1:
categories = channel_then_categories[1]
categories = "default"
if channel == "gdb-remote" and lldb.remote_platform is None:
# communicate gdb-remote categories to debugserver
os.environ["LLDB_DEBUGSERVER_LOG_FLAGS"] = categories
log_enable + channel_with_categories, self.res)
if not self.res.Succeeded():
raise Exception(
'log enable failed (check LLDB_LOG_OPTION env variable)')
# Communicate log path name to debugserver & lldb-server
# For remote debugging, these variables need to be set when starting the platform
# instance.
if lldb.remote_platform is None:
server_log_path = "{}-server.log".format(log_basename)
open(server_log_path, 'w').close()
os.environ["LLDB_DEBUGSERVER_LOG_FILE"] = server_log_path
# Communicate channels to lldb-server
os.environ["LLDB_SERVER_LOG_CHANNELS"] = ":".join(
def disableLogChannelsForCurrentTest(self):
# close all log files that we opened
for channel_and_categories in lldbtest_config.channels:
# channel format - <channel-name> [<category0> [<category1> ...]]
channel = channel_and_categories.split(' ', 1)[0]"log disable " + channel, self.res)
if not self.res.Succeeded():
raise Exception(
'log disable failed (check LLDB_LOG_OPTION env variable)')
# Retrieve the server log (if any) from the remote system. It is assumed the server log
# is writing to the "server.log" file in the current test directory. This can be
# achieved by setting LLDB_DEBUGSERVER_LOG_FILE="server.log" when starting remote
# platform.
if lldb.remote_platform:
server_log_path = self.getLogBasenameForCurrentTest() + "-server.log"
if lldb.remote_platform.Get(
def setPlatformWorkingDir(self):
if not lldb.remote_platform or not configuration.lldb_platform_working_dir:
components = self.mydir.split(os.path.sep) + [str(self.test_number), self.getBuildDirBasename()]
remote_test_dir = configuration.lldb_platform_working_dir
for c in components:
remote_test_dir = lldbutil.join_remote_paths(remote_test_dir, c)
error = lldb.remote_platform.MakeDirectory(
remote_test_dir, 448) # 448 = 0o700
if error.Fail():
raise Exception("making remote directory '%s': %s" % (
remote_test_dir, error))
# This function removes all files from the current working directory while leaving
# the directories in place. The cleanup is required to reduce the disk space required
# by the test suite while leaving the directories untouched is neccessary because
# sub-directories might belong to an other test
def clean_working_directory():
# TODO: Make it working on Windows when we need it for remote debugging support
# TODO: Replace the heuristic to remove the files with a logic what collects the
# list of files we have to remove during test runs.
shell_cmd = lldb.SBPlatformShellCommand(
"rm %s/*" % remote_test_dir)
def getSourceDir(self):
"""Return the full path to the current test."""
return os.path.join(configuration.test_src_root, self.mydir)
def getBuildDirBasename(self):
return self.__class__.__module__ + "." + self.testMethodName
def getBuildDir(self):
"""Return the full path to the current test."""
return os.path.join(configuration.test_build_dir, self.mydir,
def makeBuildDir(self):
"""Create the test-specific working directory, deleting any previous
bdir = self.getBuildDir()
if os.path.isdir(bdir):
def getBuildArtifact(self, name="a.out"):
"""Return absolute path to an artifact in the test's build directory."""
return os.path.join(self.getBuildDir(), name)
def getSourcePath(self, name):
"""Return absolute path to a file in the test's source directory."""
return os.path.join(self.getSourceDir(), name)
def setUpCommands(cls):
commands = [
# First of all, clear all settings to have clean state of global properties.
"settings clear -all",
# Disable Spotlight lookup. The testsuite creates
# different binaries with the same UUID, because they only
# differ in the debug info, which is not being hashed.
"settings set symbols.enable-external-lookup false",
# Inherit the TCC permissions from the inferior's parent.
"settings set target.inherit-tcc true",
# Kill rather than detach from the inferior if something goes wrong.
"settings set target.detach-on-error false",
# Disable fix-its by default so that incorrect expressions in tests don't
# pass just because Clang thinks it has a fix-it.
"settings set false",
# Testsuite runs in parallel and the host can have also other load.
"settings set plugin.process.gdb-remote.packet-timeout 60",
'settings set symbols.clang-modules-cache-path "{}"'.format(
"settings set use-color false",
# Set any user-overridden settings.
for setting, value in configuration.settings:
commands.append('setting set %s %s'%(setting, value))
# Make sure that a sanitizer LLDB's environment doesn't get passed on.
if cls.platformContext and cls.platformContext.shlib_environment_var in os.environ:
commands.append('settings set target.env-vars {}='.format(
# Set environment variables for the inferior.
if lldbtest_config.inferior_env:
commands.append('settings set target.env-vars {}'.format(
return commands
def setUp(self):
"""Fixture for unittest test case setup.
It works with the test driver to conditionally skip tests and does other
#import traceback
# traceback.print_stack()
if "LIBCXX_PATH" in os.environ:
self.libcxxPath = os.environ["LIBCXX_PATH"]
self.libcxxPath = None
if "LLDBVSCODE_EXEC" in os.environ:
self.lldbVSCodeExec = os.environ["LLDBVSCODE_EXEC"]
self.lldbVSCodeExec = None
self.lldbOption = " ".join(
"-o '" + s + "'" for s in self.setUpCommands())
# If we spawn an lldb process for test (via pexpect), do not load the
# init file unless told otherwise.
if os.environ.get("NO_LLDBINIT") != "NO":
self.lldbOption += " --no-lldbinit"
# Assign the test method name to self.testMethodName.
# For an example of the use of this attribute, look at test/types dir.
# There are a bunch of test cases under test/types and we don't want the
# module cacheing subsystem to be confused with executable name "a.out"
# used for all the test cases.
self.testMethodName = self._testMethodName
# This is for the case of directly spawning 'lldb'/'gdb' and interacting
# with it using pexpect.
self.child = None
self.child_prompt = "(lldb) "
# If the child is interacting with the embedded script interpreter,
# there are two exits required during tear down, first to quit the
# embedded script interpreter and second to quit the lldb command
# interpreter.
self.child_in_script_interpreter = False
# These are for customized teardown cleanup.
self.dict = None
self.doTearDownCleanup = False
# And in rare cases where there are multiple teardown cleanups.
self.dicts = []
self.doTearDownCleanups = False
# List of spawned subproces.Popen objects
self.subprocesses = []
# List of log files produced by the current test.
self.log_files = []
# Create the build directory.
# The logs are stored in the build directory, so we have to create it
# before creating the first log file.
session_file = self.getLogBasenameForCurrentTest()+".log"
# Python 3 doesn't support unbuffered I/O in text mode. Open buffered.
self.session =, "utf-8", mode="w")
# Optimistically set __errored__, __failed__, __expected__ to False
# initially. If the test errored/failed, the session info
# (self.session) is then dumped into a session specific file for
# diagnosis.
self.__cleanup_errored__ = False
self.__errored__ = False
self.__failed__ = False
self.__expected__ = False
# We are also interested in unexpected success.
self.__unexpected__ = False
# And skipped tests.
self.__skipped__ = False
# See addTearDownHook(self, hook) which allows the client to add a hook
# function to be run during tearDown() time.
self.hooks = []
# See HideStdout(self).
self.sys_stdout_hidden = False
if self.platformContext:
# set environment variable names for finding shared libraries
self.dylibPath = self.platformContext.shlib_environment_var
# Create the debugger instance.
self.dbg = lldb.SBDebugger.Create()
# Copy selected platform from a global instance if it exists.
if lldb.selected_platform is not None:
if not self.dbg:
raise Exception('Invalid debugger instance')
# Retrieve the associated command interpreter instance. = self.dbg.GetCommandInterpreter()
if not
raise Exception('Could not get the command interpreter')
# And the result object.
self.res = lldb.SBCommandReturnObject()
self.lib_lldb = None
self.framework_dir = None
self.darwinWithFramework = False
if sys.platform.startswith("darwin") and configuration.lldb_framework_path:
framework = configuration.lldb_framework_path
lib = os.path.join(framework, 'LLDB')
if os.path.exists(lib):
self.framework_dir = os.path.dirname(framework)
self.lib_lldb = lib
self.darwinWithFramework = self.platformIsDarwin()
def setAsync(self, value):
""" Sets async mode to True/False and ensures it is reset after the testcase completes."""
old_async = self.dbg.GetAsync()
self.addTearDownHook(lambda: self.dbg.SetAsync(old_async))
def cleanupSubprocesses(self):
# Terminate subprocesses in reverse order from how they were created.
for p in reversed(self.subprocesses):
del p
del self.subprocesses[:]
def spawnSubprocess(self, executable, args=[], extra_env=None, install_remote=True):
""" Creates a subprocess.Popen object with the specified executable and arguments,
saves it in self.subprocesses, and returns the object.
proc = _RemoteProcess(
install_remote) if lldb.remote_platform else _LocalProcess(self.TraceOn())
proc.launch(executable, args, extra_env=extra_env)
return proc
def HideStdout(self):
"""Hide output to stdout from the user.
During test execution, there might be cases where we don't want to show the
standard output to the user. For example,
self.runCmd(r'''sc print("\n\n\tHello!\n")''')
tests whether command abbreviation for 'script' works or not. There is no
need to show the 'Hello' output to the user as long as the 'script' command
succeeds and we are not in TraceOn() mode (see the '-t' option).
In this case, the test method calls self.HideStdout(self) to redirect the
sys.stdout to a null device, and restores the sys.stdout upon teardown.
Note that you should only call this method at most once during a test case
execution. Any subsequent call has no effect at all."""
if self.sys_stdout_hidden:
self.sys_stdout_hidden = True
old_stdout = sys.stdout
sys.stdout = open(os.devnull, 'w')
def restore_stdout():
sys.stdout = old_stdout
# =======================================================================
# Methods for customized teardown cleanups as well as execution of hooks.
# =======================================================================
def setTearDownCleanup(self, dictionary=None):
"""Register a cleanup action at tearDown() time with a dictionary"""
self.dict = dictionary
self.doTearDownCleanup = True
def addTearDownCleanup(self, dictionary):
"""Add a cleanup action at tearDown() time with a dictionary"""
self.doTearDownCleanups = True
def addTearDownHook(self, hook):
Add a function to be run during tearDown() time.
Hooks are executed in a first come first serve manner.
if callable(hook):
with recording(self, traceAlways) as sbuf:
"Adding tearDown hook:",
return self
def deletePexpectChild(self):
# This is for the case of directly spawning 'lldb' and interacting with it
# using pexpect.
if self.child and self.child.isalive():
import pexpect
with recording(self, traceAlways) as sbuf:
print("tearing down the child process....", file=sbuf)
if self.child_in_script_interpreter:
'settings set interpreter.prompt-on-quit false')
except (ValueError, pexpect.ExceptionPexpect):
# child is already terminated
except OSError as exception:
import errno
if exception.errno != errno.EIO:
# unexpected error
# child is already terminated
# Give it one final blow to make sure the child is terminated.
def tearDown(self):
"""Fixture for unittest test case teardown."""
# Check and run any hook functions.
for hook in reversed(self.hooks):
with recording(self, traceAlways) as sbuf:
"Executing tearDown hook:",
if funcutils.requires_self(hook):
hook() # try the plain call and hope it works
del self.hooks
# Perform registered teardown cleanup.
if doCleanup and self.doTearDownCleanup:
# In rare cases where there are multiple teardown cleanups added.
if doCleanup and self.doTearDownCleanups:
if self.dicts:
for dict in reversed(self.dicts):
# Remove subprocesses created by the test.
# This must be the last statement, otherwise teardown hooks or other
# lines might depend on this still being active.
del self.dbg
# All modules should be orphaned now so that they can be cleared from
# the shared module cache.
# Assert that the global module cache is empty.
self.assertEqual(lldb.SBModule.GetNumberAllocatedModules(), 0)
# =========================================================
# Various callbacks to allow introspection of test progress
# =========================================================
def markError(self):
"""Callback invoked when an error (unexpected exception) errored."""
self.__errored__ = True
with recording(self, False) as sbuf:
# False because there's no need to write "ERROR" to the stderr twice.
# Once by the Python unittest framework, and a second time by us.
print("ERROR", file=sbuf)
def markCleanupError(self):
"""Callback invoked when an error occurs while a test is cleaning up."""
self.__cleanup_errored__ = True
with recording(self, False) as sbuf:
# False because there's no need to write "CLEANUP_ERROR" to the stderr twice.
# Once by the Python unittest framework, and a second time by us.
print("CLEANUP_ERROR", file=sbuf)
def markFailure(self):
"""Callback invoked when a failure (test assertion failure) occurred."""
self.__failed__ = True
with recording(self, False) as sbuf:
# False because there's no need to write "FAIL" to the stderr twice.
# Once by the Python unittest framework, and a second time by us.
print("FAIL", file=sbuf)
def markExpectedFailure(self, err, bugnumber):
"""Callback invoked when an expected failure/error occurred."""
self.__expected__ = True
with recording(self, False) as sbuf:
# False because there's no need to write "expected failure" to the
# stderr twice.
# Once by the Python unittest framework, and a second time by us.
if bugnumber is None:
print("expected failure", file=sbuf)
"expected failure (problem id:" + str(bugnumber) + ")",
def markSkippedTest(self):
"""Callback invoked when a test is skipped."""
self.__skipped__ = True
with recording(self, False) as sbuf:
# False because there's no need to write "skipped test" to the
# stderr twice.
# Once by the Python unittest framework, and a second time by us.
print("skipped test", file=sbuf)
def markUnexpectedSuccess(self, bugnumber):
"""Callback invoked when an unexpected success occurred."""
self.__unexpected__ = True
with recording(self, False) as sbuf:
# False because there's no need to write "unexpected success" to the
# stderr twice.
# Once by the Python unittest framework, and a second time by us.
if bugnumber is None:
print("unexpected success", file=sbuf)
"unexpected success (problem id:" + str(bugnumber) + ")",
def getRerunArgs(self):
return " -f %s.%s" % (self.__class__.__name__, self._testMethodName)
def getLogBasenameForCurrentTest(self, prefix="Incomplete"):
returns a partial path that can be used as the beginning of the name of multiple
log files pertaining to this test
return os.path.join(self.getBuildDir(), prefix)
def dumpSessionInfo(self):
Dump the debugger interactions leading to a test error/failure. This
allows for more convenient postmortem analysis.
See also LLDBTestResult ( which is a singlton class derived
from TextTestResult and overwrites addError, addFailure, and
addExpectedFailure methods to allow us to to mark the test instance as
# We are here because self.tearDown() detected that this test instance
# either errored or failed. The lldb.test_result singleton contains
# two lists (errors and failures) which get populated by the unittest
# framework. Look over there for stack trace information.
# The lists contain 2-tuples of TestCase instances and strings holding
# formatted tracebacks.
# See
# output tracebacks into session
pairs = []
if self.__errored__:
pairs = configuration.test_result.errors
prefix = 'Error'
elif self.__cleanup_errored__:
pairs = configuration.test_result.cleanup_errors
prefix = 'CleanupError'
elif self.__failed__:
pairs = configuration.test_result.failures
prefix = 'Failure'
elif self.__expected__:
pairs = configuration.test_result.expectedFailures
prefix = 'ExpectedFailure'
elif self.__skipped__:
prefix = 'SkippedTest'
elif self.__unexpected__:
prefix = 'UnexpectedSuccess'
prefix = 'Success'
if not self.__unexpected__ and not self.__skipped__:
for test, traceback in pairs:
if test is self:
print(traceback, file=self.session)
import datetime
"Session info generated @",,
del self.session
# process the log files
if prefix != 'Success' or lldbtest_config.log_success:
# keep all log files, rename them to include prefix
src_log_basename = self.getLogBasenameForCurrentTest()
dst_log_basename = self.getLogBasenameForCurrentTest(prefix)
for src in self.log_files:
if os.path.isfile(src):
dst = src.replace(src_log_basename, dst_log_basename)
if == "nt" and os.path.isfile(dst):
# On Windows, renaming a -> b will throw an exception if
# b exists. On non-Windows platforms it silently
# replaces the destination. Ultimately this means that
# atomic renames are not guaranteed to be possible on
# Windows, but we need this to work anyway, so just
# remove the destination first if it already exists.
os.rename(src, dst)
# success! (and we don't want log files) delete log files
for log_file in self.log_files:
if os.path.isfile(log_file):
# ====================================================
# Config. methods supported through a plugin interface
# (enables reading of the current test configuration)
# ====================================================
def isMIPS(self):
"""Returns true if the architecture is MIPS."""
arch = self.getArchitecture()
if re.match("mips", arch):
return True
return False
def isPPC64le(self):
"""Returns true if the architecture is PPC64LE."""
arch = self.getArchitecture()
if re.match("powerpc64le", arch):
return True
return False
def getCPUInfo(self):
triple = self.dbg.GetSelectedPlatform().GetTriple()
# TODO other platforms, please implement this function
if not re.match(".*-.*-linux", triple):
return ""
# Need to do something different for non-Linux/Android targets
cpuinfo_path = self.getBuildArtifact("cpuinfo")
if configuration.lldb_platform_name:
self.runCmd('platform get-file "/proc/cpuinfo" ' + cpuinfo_path)
cpuinfo_path = "/proc/cpuinfo"
with open(cpuinfo_path, 'r') as f:
cpuinfo =
return ""
return cpuinfo
def isAArch64(self):
"""Returns true if the architecture is AArch64."""
arch = self.getArchitecture().lower()
return arch in ["aarch64", "arm64", "arm64e"]
def isAArch64SVE(self):
return self.isAArch64() and "sve" in self.getCPUInfo()
def isAArch64MTE(self):
return self.isAArch64() and "mte" in self.getCPUInfo()
def isAArch64PAuth(self):
if self.getArchitecture() == "arm64e":
return True
return self.isAArch64() and "paca" in self.getCPUInfo()
def getArchitecture(self):
"""Returns the architecture in effect the test suite is running with."""
module = builder_module()
arch = module.getArchitecture()
if arch == 'amd64':
arch = 'x86_64'
if arch in ['armv7l', 'armv8l'] :
arch = 'arm'
return arch
def getLldbArchitecture(self):
"""Returns the architecture of the lldb binary."""
if not hasattr(self, 'lldbArchitecture'):
# These two target settings prevent lldb from doing setup that does
# nothing but slow down the end goal of printing the architecture.
command = [
"-o", "settings set target.preload-symbols false",
"-o", "settings set target.load-script-from-symbol-file false",
"-o", "file " + lldbtest_config.lldbExec,
output = check_output(command)
str = output.decode()
for line in str.splitlines():
m =
r"Current executable set to '.*' \((.*)\)\.", line)
if m:
self.lldbArchitecture =
return self.lldbArchitecture
def getCompiler(self):
"""Returns the compiler in effect the test suite is running with."""
module = builder_module()
return module.getCompiler()
def getCompilerBinary(self):
"""Returns the compiler binary the test suite is running with."""
return self.getCompiler().split()[0]
def getCompilerVersion(self):
""" Returns a string that represents the compiler version.
Supports: llvm, clang.
compiler = self.getCompilerBinary()
version_output = check_output([compiler, "--version"], errors="replace")
m ='version ([0-9.]+)', version_output)
if m:
return 'unknown'
def getDwarfVersion(self):
""" Returns the dwarf version generated by clang or '0'. """
if configuration.dwarf_version:
return str(configuration.dwarf_version)
if 'clang' in self.getCompiler():
triple = builder_module().getTriple(self.getArchitecture())
target = ['-target', triple] if triple else []
driver_output = check_output(
[self.getCompiler()] + target + '-g -c -x c - -o - -###'.split(),
driver_output = driver_output.decode("utf-8")
for line in driver_output.split(os.linesep):
m ='dwarf-version=([0-9])', line)
if m:
except CalledProcessError:
return '0'
def platformIsDarwin(self):
"""Returns true if the OS triple for the selected platform is any valid apple OS"""
return lldbplatformutil.platformIsDarwin()
def hasDarwinFramework(self):
return self.darwinWithFramework
def getPlatform(self):
"""Returns the target platform the test suite is running on."""
return lldbplatformutil.getPlatform()
def isIntelCompiler(self):
""" Returns true if using an Intel (ICC) compiler, false otherwise. """
return any([x in self.getCompiler() for x in ["icc", "icpc", "icl"]])
def expectedCompilerVersion(self, compiler_version):
"""Returns True iff compiler_version[1] matches the current compiler version.
Use compiler_version[0] to specify the operator used to determine if a match has occurred.
Any operator other than the following defaults to an equality test:
'>', '>=', "=>", '<', '<=', '=<', '!=', "!" or 'not'
If the current compiler version cannot be determined, we assume it is close to the top
of trunk, so any less-than or equal-to comparisons will return False, and any
greater-than or not-equal-to comparisons will return True.
if compiler_version is None:
return True
operator = str(compiler_version[0])
version = compiler_version[1]
if version is None:
return True
test_compiler_version = self.getCompilerVersion()
if test_compiler_version == 'unknown':
# Assume the compiler version is at or near the top of trunk.
return operator in ['>', '>=', '!', '!=', 'not']
if operator == '>':
return LooseVersion(test_compiler_version) > LooseVersion(version)
if operator == '>=' or operator == '=>':
return LooseVersion(test_compiler_version) >= LooseVersion(version)
if operator == '<':
return LooseVersion(test_compiler_version) < LooseVersion(version)
if operator == '<=' or operator == '=<':
return LooseVersion(test_compiler_version) <= LooseVersion(version)
if operator == '!=' or operator == '!' or operator == 'not':
return str(version) not in str(test_compiler_version)
return str(version) in str(test_compiler_version)
def expectedCompiler(self, compilers):
"""Returns True iff any element of compilers is a sub-string of the current compiler."""
if (compilers is None):
return True
for compiler in compilers:
if compiler in self.getCompiler():
return True
return False
def expectedArch(self, archs):
"""Returns True iff any element of archs is a sub-string of the current architecture."""
if (archs is None):
return True
for arch in archs:
if arch in self.getArchitecture():
return True
return False
def getRunOptions(self):
"""Command line option for -A and -C to run this test again, called from
arch = self.getArchitecture()
comp = self.getCompiler()
option_str = ""
if arch:
option_str = "-A " + arch
if comp:
option_str += " -C " + comp
return option_str
def getDebugInfo(self):
method = getattr(self, self.testMethodName)
return getattr(method, "debug_info", None)
def build(
"""Platform specific way to build binaries."""
if not architecture and configuration.arch:
architecture = configuration.arch
if debug_info is None:
debug_info = self.getDebugInfo()
dictionary = lldbplatformutil.finalize_build_dictionary(dictionary)
testdir = self.mydir
testname = self.getBuildDirBasename()
module = builder_module()
command = builder_module().getBuildCommand(debug_info, architecture,
compiler, dictionary, testdir, testname, make_targets)
if command is None:
raise Exception("Don't know how to build binary")
def runBuildCommand(self, command):
output = check_output(command, stderr=STDOUT, errors="replace")
except CalledProcessError as cpe:
raise build_exception.BuildError(cpe)
# ==================================================
# Build methods supported through a plugin interface
# ==================================================
def getstdlibFlag(self):
""" Returns the proper -stdlib flag, or empty if not required."""
if self.platformIsDarwin() or self.getPlatform() == "freebsd" or self.getPlatform() == "openbsd":
stdlibflag = "-stdlib=libc++"
else: # this includes NetBSD
stdlibflag = ""
return stdlibflag
def getstdFlag(self):
""" Returns the proper stdflag. """
if "gcc" in self.getCompiler() and "4.6" in self.getCompilerVersion():
stdflag = "-std=c++0x"
stdflag = "-std=c++11"
return stdflag
def buildDriver(self, sources, exe_name):
""" Platform-specific way to build a program that links with LLDB (via the
or LLDB.framework).
stdflag = self.getstdFlag()
stdlibflag = self.getstdlibFlag()
lib_dir = configuration.lldb_libs_dir
if self.hasDarwinFramework():
d = {'CXX_SOURCES': sources,
'EXE': exe_name,
'CFLAGS_EXTRAS': "%s %s" % (stdflag, stdlibflag),
'FRAMEWORK_INCLUDES': "-F%s" % self.framework_dir,
'LD_EXTRAS': "%s -Wl,-rpath,%s" % (self.lib_lldb, self.framework_dir),
elif sys.platform.startswith('win'):
d = {
'CXX_SOURCES': sources,
'EXE': exe_name,
'CFLAGS_EXTRAS': "%s %s -I%s" % (stdflag,
'LD_EXTRAS': "-L%s -lliblldb" % lib_dir}
d = {
'CXX_SOURCES': sources,
'EXE': exe_name,
'CFLAGS_EXTRAS': "%s %s -I%s" % (stdflag,
'LD_EXTRAS': "-L%s -llldb -Wl,-rpath,%s" % (lib_dir, lib_dir)}
if self.TraceOn():
"Building LLDB Driver (%s) from sources %s" %
(exe_name, sources))
def buildLibrary(self, sources, lib_name):
"""Platform specific way to build a default library. """
stdflag = self.getstdFlag()
lib_dir = configuration.lldb_libs_dir
if self.hasDarwinFramework():
d = {'DYLIB_CXX_SOURCES': sources,
'DYLIB_NAME': lib_name,
'CFLAGS_EXTRAS': "%s -stdlib=libc++" % stdflag,
'FRAMEWORK_INCLUDES': "-F%s" % self.framework_dir,
'LD_EXTRAS': "%s -Wl,-rpath,%s -dynamiclib" % (self.lib_lldb, self.framework_dir),
elif self.getPlatform() == 'windows':
d = {
'DYLIB_NAME': lib_name,
'CFLAGS_EXTRAS': "%s -I%s " % (stdflag,
'LD_EXTRAS': "-shared -l%s\liblldb.lib" % lib_dir}
d = {
'DYLIB_NAME': lib_name,
'CFLAGS_EXTRAS': "%s -I%s -fPIC" % (stdflag,
'LD_EXTRAS': "-shared -L%s -llldb -Wl,-rpath,%s" % (lib_dir, lib_dir)}
if self.TraceOn():
"Building LLDB Library (%s) from sources %s" %
(lib_name, sources))
def buildProgram(self, sources, exe_name):
""" Platform specific way to build an executable from C/C++ sources. """
d = {'CXX_SOURCES': sources,
'EXE': exe_name}
def signBinary(self, binary_path):
if sys.platform.startswith("darwin"):
codesign_cmd = "codesign --force --sign \"%s\" %s" % (
lldbtest_config.codesign_identity, binary_path)
call(codesign_cmd, shell=True)
def findBuiltClang(self):
"""Tries to find and use Clang from the build directory as the compiler (instead of the system compiler)."""
paths_to_try = [
lldb_root_path = os.path.join(
os.path.dirname(__file__), "..", "..", "..", "..")
for p in paths_to_try:
path = os.path.join(lldb_root_path, p)
if os.path.exists(path):
return path
# Tries to find clang at the same folder as the lldb
lldb_dir = os.path.dirname(lldbtest_config.lldbExec)
path = shutil.which("clang", path=lldb_dir)
if path is not None:
return path
return os.environ["CC"]
def yaml2obj(self, yaml_path, obj_path, max_size=None):
Create an object file at the given path from a yaml file.
Throws subprocess.CalledProcessError if the object could not be created.
yaml2obj_bin = configuration.get_yaml2obj_path()
if not yaml2obj_bin:
self.assertTrue(False, "No valid yaml2obj executable specified")
command = [yaml2obj_bin, "-o=%s" % obj_path, yaml_path]
if max_size is not None:
command += ["--max-size=%d" % max_size]
def cleanup(self, dictionary=None):
"""Platform specific way to do cleanup after build."""
module = builder_module()
if not module.cleanup(dictionary):
raise Exception(
"Don't know how to do cleanup with dictionary: " +
def invoke(self, obj, name, trace=False):
"""Use reflection to call a method dynamically with no argument."""
trace = (True if traceAlways else trace)
method = getattr(obj, name)
import inspect
name + "is a method name of object: " + str(obj))
result = method()
with recording(self, trace) as sbuf:
print(str(method) + ":", result, file=sbuf)
return result
def getLLDBLibraryEnvVal(self):
""" Returns the path that the OS-specific library search environment variable
(self.dylibPath) should be set to in order for a program to find the LLDB
library. If an environment variable named self.dylibPath is already set,
the new path is appended to it and returned.
existing_library_path = os.environ[
self.dylibPath] if self.dylibPath in os.environ else None
if existing_library_path:
return "%s:%s" % (existing_library_path, configuration.lldb_libs_dir)
if sys.platform.startswith("darwin") and configuration.lldb_framework_path:
return configuration.lldb_framework_path
return configuration.lldb_libs_dir
def getLibcPlusPlusLibs(self):
if self.getPlatform() in ('freebsd', 'linux', 'netbsd', 'openbsd'):
return ['']
return ['libc++.1.dylib', 'libc++abi.']
def run_platform_command(self, cmd):
platform = self.dbg.GetSelectedPlatform()
shell_command = lldb.SBPlatformShellCommand(cmd)
err = platform.Run(shell_command)
return (err, shell_command.GetStatus(), shell_command.GetOutput())
def get_stats(self, options=None):
Get the output of the "statistics dump" with optional extra options
and return the JSON as a python dictionary.
return_obj = lldb.SBCommandReturnObject()
command = "statistics dump "
if options is not None:
command += options, return_obj, False)
metrics_json = return_obj.GetOutput()
return json.loads(metrics_json)
# Metaclass for TestBase to change the list of test metods when a new TestCase is loaded.
# We change the test methods to create a new test method for each test for each debug info we are
# testing. The name of the new test method will be '<original-name>_<debug-info>' and with adding
# the new test method we remove the old method at the same time. This functionality can be
# supressed by at test case level setting the class attribute NO_DEBUG_INFO_TESTCASE or at test
# level by using the decorator @no_debug_info_test.
class LLDBTestCaseFactory(type):
def __new__(cls, name, bases, attrs):
original_testcase = super(
LLDBTestCaseFactory, cls).__new__(
cls, name, bases, attrs)
if original_testcase.NO_DEBUG_INFO_TESTCASE:
return original_testcase
newattrs = {}
for attrname, attrvalue in attrs.items():
if attrname.startswith("test") and not getattr(
attrvalue, "__no_debug_info_test__", False):
# If any debug info categories were explicitly tagged, assume that list to be
# authoritative. If none were specified, try with all debug
# info formats.
all_dbginfo_categories = set(test_categories.debug_info_categories.keys())
categories = set(
[])) & all_dbginfo_categories
if not categories:
categories = [category for category, can_replicate \
in test_categories.debug_info_categories.items() \
if can_replicate]
for cat in categories:
def test_method(self, attrvalue=attrvalue):
return attrvalue(self)
method_name = attrname + "_" + cat
test_method.__name__ = method_name
test_method.debug_info = cat
newattrs[method_name] = test_method
newattrs[attrname] = attrvalue
return super(
# Setup the metaclass for this class to change the list of the test
# methods when a new class is loaded
class TestBase(Base, metaclass=LLDBTestCaseFactory):
This abstract base class is meant to be subclassed. It provides default
implementations for setUpClass(), tearDownClass(), setUp(), and tearDown(),
among other things.
Important things for test class writers:
- The setUp method sets up things to facilitate subsequent interactions
with the debugger as part of the test. These include:
- populate the test method name
- create/get a debugger set with synchronous mode (self.dbg)
- get the command interpreter from with the debugger (
- create a result object for use with the command interpreter
- plus other stuffs
- The tearDown method tries to perform some necessary cleanup on behalf
of the test to return the debugger to a good state for the next test.
These include:
- execute any tearDown hooks registered by the test method with
TestBase.addTearDownHook(); examples can be found in
- kill the inferior process associated with each target, if any,
and, then delete the target from the debugger's target list
- perform build cleanup before running the next test method in the
same test class; examples of registering for this service can be
found in types/ with the call:
- self.setTearDownCleanup(dictionary=d)
- Similarly setUpClass and tearDownClass perform classwise setup and
teardown fixtures. The tearDownClass method invokes a default build
cleanup for the entire test class; also, subclasses can implement the
classmethod classCleanup(cls) to perform special class cleanup action.
- The instance methods runCmd and expect are used heavily by existing
test cases to send a command to the command interpreter and to perform
string/pattern matching on the output of such command execution. The
expect method also provides a mode to peform string/pattern matching
without running a command.
- The build method is used to build the binaries used during a
particular test scenario. A plugin should be provided for the
sys.platform running the test suite. The Mac OS X implementation is
located in builders/
# Subclasses can set this to true (if they don't depend on debug info) to avoid running the
# test multiple times with various debug info types.
# Maximum allowed attempts when launching the inferior process.
# Can be overridden by the LLDB_MAX_LAUNCH_COUNT environment variable.
maxLaunchCount = 1
# Time to wait before the next launching attempt in second(s).
# Can be overridden by the LLDB_TIME_WAIT_NEXT_LAUNCH environment variable.
timeWaitNextLaunch = 1.0
def generateSource(self, source):
template = source + '.template'
temp = os.path.join(self.getSourceDir(), template)
with open(temp, 'r') as f:
content =
public_api_dir = os.path.join(
os.environ["LLDB_SRC"], "include", "lldb", "API")
# Look under the include/lldb/API directory and add #include statements
# for all the SB API headers.
public_headers = os.listdir(public_api_dir)
# For different platforms, the include statement can vary.
if self.hasDarwinFramework():
include_stmt = "'#include <%s>' % os.path.join('LLDB', header)"
include_stmt = "'#include <%s>' % os.path.join(r'" + public_api_dir + "', header)"
list = [eval(include_stmt) for header in public_headers if (
header.startswith("SB") and header.endswith(".h"))]
includes = '\n'.join(list)
new_content = content.replace('%include_SB_APIs%', includes)
new_content = new_content.replace('%SOURCE_DIR%', self.getSourceDir())
src = os.path.join(self.getBuildDir(), source)
with open(src, 'w') as f:
self.addTearDownHook(lambda: os.remove(src))
def setUp(self):
# Works with the test driver to conditionally skip tests via
# decorators.
for s in self.setUpCommands():
if "LLDB_MAX_LAUNCH_COUNT" in os.environ:
self.maxLaunchCount = int(os.environ["LLDB_MAX_LAUNCH_COUNT"])
if "LLDB_TIME_WAIT_NEXT_LAUNCH" in os.environ:
self.timeWaitNextLaunch = float(
# We want our debugger to be synchronous.
# Retrieve the associated command interpreter instance. = self.dbg.GetCommandInterpreter()
if not
raise Exception('Could not get the command interpreter')
# And the result object.
self.res = lldb.SBCommandReturnObject()
def registerSharedLibrariesWithTarget(self, target, shlibs):
'''If we are remotely running the test suite, register the shared libraries with the target so they get uploaded, otherwise do nothing
Any modules in the target that have their remote install file specification set will
get uploaded to the remote host. This function registers the local copies of the
shared libraries with the target and sets their remote install locations so they will
be uploaded when the target is run.
if not shlibs or not self.platformContext:
return None
shlib_environment_var = self.platformContext.shlib_environment_var
shlib_prefix = self.platformContext.shlib_prefix
shlib_extension = '.' + self.platformContext.shlib_extension
dirs = []
# Add any shared libraries to our target if remote so they get
# uploaded into the working directory on the remote side
for name in shlibs:
# The path can be a full path to a shared library, or a make file name like "Foo" for
# "libFoo.dylib" or "", or "" for "" or "", or just a
# basename like "". So figure out which one it is and resolve the local copy
# of the shared library accordingly
if os.path.isfile(name):
local_shlib_path = name # name is the full path to the local shared library
# Check relative names
local_shlib_path = os.path.join(
self.getBuildDir(), shlib_prefix + name + shlib_extension)
if not os.path.exists(local_shlib_path):
local_shlib_path = os.path.join(
self.getBuildDir(), name + shlib_extension)
if not os.path.exists(local_shlib_path):
local_shlib_path = os.path.join(self.getBuildDir(), name)
# Make sure we found the local shared library in the above code
# Add the shared library to our target
shlib_module = target.AddModule(local_shlib_path, None, None, None)
if lldb.remote_platform:
# We must set the remote install location if we want the shared library
# to get uploaded to the remote target
remote_shlib_path = lldbutil.append_to_process_working_directory(self,
lldb.SBFileSpec(remote_shlib_path, False))
dir_to_add = self.get_process_working_directory()
dir_to_add = os.path.dirname(local_shlib_path)
if dir_to_add not in dirs:
env_value = self.platformContext.shlib_path_separator.join(dirs)
return ['%s=%s' % (shlib_environment_var, env_value)]
def registerSanitizerLibrariesWithTarget(self, target):
runtimes = []
for m in target.module_iter():
libspec = m.GetFileSpec()
if "clang_rt" in libspec.GetFilename():
return self.registerSharedLibrariesWithTarget(target, runtimes)
# utility methods that tests can use to access the current objects
def target(self):
if not self.dbg:
raise Exception('Invalid debugger instance')
return self.dbg.GetSelectedTarget()
def process(self):
if not self.dbg:
raise Exception('Invalid debugger instance')
return self.dbg.GetSelectedTarget().GetProcess()
def thread(self):
if not self.dbg:
raise Exception('Invalid debugger instance')
return self.dbg.GetSelectedTarget().GetProcess().GetSelectedThread()
def frame(self):
if not self.dbg:
raise Exception('Invalid debugger instance')
return self.dbg.GetSelectedTarget().GetProcess(
def get_process_working_directory(self):
'''Get the working directory that should be used when launching processes for local or remote processes.'''
if lldb.remote_platform:
# Remote tests set the platform working directory up in
# TestBase.setUp()
return lldb.remote_platform.GetWorkingDirectory()
# local tests change directory into each test subdirectory
return self.getBuildDir()
def tearDown(self):
# Ensure all the references to SB objects have gone away so that we can
# be sure that all test-specific resources have been freed before we
# attempt to delete the targets.
# Delete the target(s) from the debugger as a general cleanup step.
# This includes terminating the process for each target, if any.
# We'd like to reuse the debugger for our next test without incurring
# the initialization overhead.
targets = []
for target in self.dbg:
if target:
process = target.GetProcess()
if process:
rc = self.invoke(process, "Kill")
assert rc.Success()
for target in targets:
# Assert that all targets are deleted.
self.assertEqual(self.dbg.GetNumTargets(), 0)
# Do this last, to make sure it's in reverse order from how we setup.
def switch_to_thread_with_stop_reason(self, stop_reason):
Run the 'thread list' command, and select the thread with stop reason as
'stop_reason'. If no such thread exists, no select action is done.
from .lldbutil import stop_reason_to_str
self.runCmd('thread list')
output = self.res.GetOutput()
thread_line_pattern = re.compile(
"^[ *] thread #([0-9]+):.*stop reason = %s" %
for line in output.splitlines():
matched = thread_line_pattern.match(line)
if matched:
self.runCmd('thread select %s' %
def runCmd(self, cmd, msg=None, check=True, trace=False, inHistory=False):
Ask the command interpreter to handle the command and then check its
return status.
# Fail fast if 'cmd' is not meaningful.
if cmd is None:
raise Exception("Bad 'cmd' parameter encountered")
trace = (True if traceAlways else trace)
if cmd.startswith("target create "):
cmd = cmd.replace("target create ", "file ")
running = (cmd.startswith("run") or cmd.startswith("process launch"))
for i in range(self.maxLaunchCount if running else 1):, self.res, inHistory)
with recording(self, trace) as sbuf:
print("runCmd:", cmd, file=sbuf)
if not check:
print("check of return status not required", file=sbuf)
if self.res.Succeeded():
print("output:", self.res.GetOutput(), file=sbuf)
print("runCmd failed!", file=sbuf)
print(self.res.GetError(), file=sbuf)
if self.res.Succeeded():
elif running:
# For process launch, wait some time before possible next try.
with recording(self, trace) as sbuf:
print("Command '" + cmd + "' failed!", file=sbuf)
if check:
output = ""
if self.res.GetOutput():
output += "\nCommand output:\n" + self.res.GetOutput()
if self.res.GetError():
output += "\nError output:\n" + self.res.GetError()
if msg:
msg += output
if cmd:
cmd += output
msg if (msg) else CMD_MSG(cmd))
def match(
"""run command in str, and match the result against regexp in patterns returning the match object for the first matching pattern
Otherwise, all the arguments have the same meanings as for the expect function"""
trace = (True if traceAlways else trace)
if exe:
# First run the command. If we are expecting error, set check=False.
# Pass the assert message along since it provides more semantic
# info.
True if trace else False),
check=not error)
# Then compare the output against expected strings.
output = self.res.GetError() if error else self.res.GetOutput()
# If error is True, the API client expects the command to fail!
if error:
"Command '" + str + "' is expected to fail!")
# No execution required, just compare str against the golden input.
output = str
with recording(self, trace) as sbuf:
print("looking at:", output, file=sbuf)
# The heading says either "Expecting" or "Not expecting".
heading = "Expecting" if matching else "Not expecting"
for pattern in patterns:
# Match Objects always have a boolean value of True.
match_object =, output)
matched = bool(match_object)
with recording(self, trace) as sbuf:
print("%s pattern: %s" % (heading, pattern), file=sbuf)
print("Matched" if matched else "Not matched", file=sbuf)
if matched:
self.assertTrue(matched if matching else not matched,
msg if msg else EXP_MSG(str, output, exe))
return match_object
def check_completion_with_desc(self, str_input, match_desc_pairs, enforce_order=False):
Checks that when the given input is completed at the given list of
completions and descriptions is returned.
:param str_input: The input that should be completed. The completion happens at the end of the string.
:param match_desc_pairs: A list of pairs that indicate what completions have to be in the list of
completions returned by LLDB. The first element of the pair is the completion
string that LLDB should generate and the second element the description.
:param enforce_order: True iff the order in which the completions are returned by LLDB
should match the order of the match_desc_pairs pairs.
interp = self.dbg.GetCommandInterpreter()
match_strings = lldb.SBStringList()
description_strings = lldb.SBStringList()
num_matches = interp.HandleCompletionWithDescriptions(str_input, len(str_input), 0, -1, match_strings, description_strings)
self.assertEqual(len(description_strings), len(match_strings))
# The index of the last matched description in description_strings or
# -1 if no description has been matched yet.
last_found_index = -1
out_of_order_errors = ""
missing_pairs = []
for pair in match_desc_pairs:
found_pair = False
for i in range(num_matches + 1):
match_candidate = match_strings.GetStringAtIndex(i)
description_candidate = description_strings.GetStringAtIndex(i)
if match_candidate == pair[0] and description_candidate == pair[1]:
found_pair = True
if enforce_order and last_found_index > i:
new_err = ("Found completion " + pair[0] + " at index " +
str(i) + " in returned completion list but " +
"should have been after completion " +
match_strings.GetStringAtIndex(last_found_index) +
" (index:" + str(last_found_index) + ")\n")
out_of_order_errors += new_err
last_found_index = i
if not found_pair:
error_msg = ""
got_failure = False
if len(missing_pairs):
got_failure = True
error_msg += "Missing pairs:\n"
for pair in missing_pairs:
error_msg += " [" + pair[0] + ":" + pair[1] + "]\n"
if len(out_of_order_errors):
got_failure = True
error_msg += out_of_order_errors
if got_failure:
error_msg += "Got the following " + str(num_matches) + " completions back:\n"
for i in range(num_matches + 1):
match_candidate = match_strings.GetStringAtIndex(i)
description_candidate = description_strings.GetStringAtIndex(i)
error_msg += "[" + match_candidate + ":" + description_candidate + "] index " + str(i) + "\n"
self.assertFalse(got_failure, error_msg)
def complete_exactly(self, str_input, patterns):
self.complete_from_to(str_input, patterns, True)
def complete_from_to(self, str_input, patterns, turn_off_re_match=False):
"""Test that the completion mechanism completes str_input to patterns,
where patterns could be a pattern-string or a list of pattern-strings"""
# Patterns should not be None in order to proceed.
self.assertFalse(patterns is None)
# And should be either a string or list of strings. Check for list type
# below, if not, make a list out of the singleton string. If patterns
# is not a string or not a list of strings, there'll be runtime errors
# later on.
if not isinstance(patterns, list):
patterns = [patterns]
interp = self.dbg.GetCommandInterpreter()
match_strings = lldb.SBStringList()
num_matches = interp.HandleCompletion(str_input, len(str_input), 0, -1, match_strings)
common_match = match_strings.GetStringAtIndex(0)
if num_matches == 0:
compare_string = str_input
if common_match != None and len(common_match) > 0:
compare_string = str_input + common_match
compare_string = ""
for idx in range(1, num_matches+1):
compare_string += match_strings.GetStringAtIndex(idx) + "\n"
for p in patterns:
if turn_off_re_match:
compare_string, msg=COMPLETION_MSG(
str_input, p, match_strings), exe=False, substrs=[p])
compare_string, msg=COMPLETION_MSG(
str_input, p, match_strings), exe=False, patterns=[p])
def completions_match(self, command, completions):
"""Checks that the completions for the given command are equal to the
given list of completions"""
interp = self.dbg.GetCommandInterpreter()
match_strings = lldb.SBStringList()
interp.HandleCompletion(command, len(command), 0, -1, match_strings)
# match_strings is a 1-indexed list, so we have to slice...
self.assertItemsEqual(completions, list(match_strings)[1:],
"List of returned completion is wrong")
def completions_contain(self, command, completions):
"""Checks that the completions for the given command contain the given
list of completions."""
interp = self.dbg.GetCommandInterpreter()
match_strings = lldb.SBStringList()
interp.HandleCompletion(command, len(command), 0, -1, match_strings)
for completion in completions:
# match_strings is a 1-indexed list, so we have to slice...
self.assertIn(completion, list(match_strings)[1:],
"Couldn't find expected completion")
def filecheck(
filecheck_options = '',
expect_cmd_failure = False):
# Run the command.
check=(not expect_cmd_failure),
msg="FileCheck'ing result of `{0}`".format(command))
self.assertTrue((not expect_cmd_failure) == self.res.Succeeded())
# Get the error text if there was an error, and the regular text if not.
output = self.res.GetOutput() if self.res.Succeeded() \
else self.res.GetError()
# Assemble the absolute path to the check file. As a convenience for
# LLDB inline tests, assume that the check file is a relative path to
# a file within the inline test directory.
if check_file.endswith('.pyc'):
check_file = check_file[:-1]
check_file_abs = os.path.abspath(check_file)
# Run FileCheck.
filecheck_bin = configuration.get_filecheck_path()
if not filecheck_bin:
self.assertTrue(False, "No valid FileCheck executable specified")
filecheck_args = [filecheck_bin, check_file_abs]
if filecheck_options:
subproc = Popen(filecheck_args, stdin=PIPE, stdout=PIPE, stderr=PIPE, universal_newlines = True)
cmd_stdout, cmd_stderr = subproc.communicate(input=output)
cmd_status = subproc.returncode
filecheck_cmd = " ".join(filecheck_args)
filecheck_trace = """
--- FileCheck trace (code={0}) ---
FileCheck input:
FileCheck output:
""".format(cmd_status, filecheck_cmd, output, cmd_stdout, cmd_stderr)
trace = cmd_status != 0 or traceAlways
with recording(self, trace) as sbuf:
print(filecheck_trace, file=sbuf)
self.assertTrue(cmd_status == 0)
def expect(
Similar to runCmd; with additional expect style output matching ability.
Ask the command interpreter to handle the command and then check its
return status. The 'msg' parameter specifies an informational assert
message. We expect the output from running the command to start with
'startstr', matches the substrings contained in 'substrs', and regexp
matches the patterns contained in 'patterns'.
When matching is true and ordered is true, which are both the default,
the strings in the substrs array have to appear in the command output
in the order in which they appear in the array.
If the keyword argument error is set to True, it signifies that the API
client is expecting the command to fail. In this case, the error stream
from running the command is retrieved and compared against the golden
input, instead.
If the keyword argument matching is set to False, it signifies that the API
client is expecting the output of the command not to match the golden
Finally, the required argument 'string' represents the lldb command to be
sent to the command interpreter. In case the keyword argument 'exe' is
set to False, the 'string' is treated as a string to be matched/not-matched
against the golden input.
# Catch cases where `expect` has been miscalled. Specifically, prevent
# this easy to make mistake:
# self.expect("lldb command", "some substr")
# The `msg` parameter is used only when a failed match occurs. A failed
# match can only occur when one of `patterns`, `startstr`, `endstr`, or
# `substrs` has been given. Thus, if a `msg` is given, it's an error to
# not also provide one of the matcher parameters.
if msg and not (patterns or startstr or endstr or substrs or error):
assert False, "expect() missing a matcher argument"
# Check `patterns` and `substrs` are not accidentally given as strings.
assert not isinstance(patterns, str), \
"patterns must be a collection of strings"
assert not isinstance(substrs, str), \
"substrs must be a collection of strings"
trace = (True if traceAlways else trace)
if exe:
# First run the command. If we are expecting error, set check=False.
# Pass the assert message along since it provides more semantic
# info.
True if trace else False),
check=not error,
# Then compare the output against expected strings.
output = self.res.GetError() if error else self.res.GetOutput()
# If error is True, the API client expects the command to fail!
if error:
"Command '" + string + "' is expected to fail!")
# No execution required, just compare string against the golden input.
if isinstance(string, lldb.SBCommandReturnObject):
output = string.GetOutput()
output = string
with recording(self, trace) as sbuf:
print("looking at:", output, file=sbuf)
expecting_str = "Expecting" if matching else "Not expecting"
def found_str(matched):
return "was found" if matched else "was not found"
# To be used as assert fail message and/or trace content
log_lines = [
"{}:".format("Ran command" if exe else "Checking string"),
# Space out command and output
if exe:
# Newline before output to make large strings more readable
log_lines.append("Got output:\n{}".format(output))
# Assume that we start matched if we want a match
# Meaning if you have no conditions, matching or
# not matching will always pass
matched = matching
# We will stop checking on first failure
if startstr:
matched = output.startswith(startstr)
log_lines.append("{} start string: \"{}\" ({})".format(
expecting_str, startstr, found_str(matched)))
if endstr and matched == matching:
matched = output.endswith(endstr)
log_lines.append("{} end string: \"{}\" ({})".format(
expecting_str, endstr, found_str(matched)))
if substrs and matched == matching:
start = 0
for substr in substrs:
index = output[start:].find(substr)
start = start + index + len(substr) if ordered and matching else 0
matched = index != -1
log_lines.append("{} sub string: \"{}\" ({})".format(
expecting_str, substr, found_str(matched)))
if matched != matching:
if patterns and matched == matching:
for pattern in patterns:
matched =, output)
pattern_line = "{} regex pattern: \"{}\" ({}".format(
expecting_str, pattern, found_str(matched))
if matched:
pattern_line += ", matched \"{}\"".format(
pattern_line += ")"
# Convert to bool because match objects
# are True-ish but != True itself
matched = bool(matched)
if matched != matching:
# If a check failed, add any extra assert message
if msg is not None and matched != matching:
log_msg = "\n".join(log_lines)
with recording(self, trace) as sbuf:
print(log_msg, file=sbuf)
if matched != matching:
def expect_expr(
Evaluates the given expression and verifies the result.
:param expr: The expression as a string.
:param result_summary: The summary that the expression should have. None if the summary should not be checked.
:param result_value: The value that the expression should have. None if the value should not be checked.
:param result_type: The type that the expression result should have. None if the type should not be checked.
:param result_children: The expected children of the expression result
as a list of ValueChecks. None if the children shouldn't be checked.
self.assertTrue(expr.strip() == expr, "Expression contains trailing/leading whitespace: '" + expr + "'")
frame = self.frame()
options = lldb.SBExpressionOptions()
# Disable fix-its that tests don't pass by accident.
# Set the usual default options for normal expressions.
if self.frame().IsValid():
eval_result = self.frame().EvaluateExpression(expr, options)
target =
# If there is no selected target, run the expression in the dummy
# target.
if not target.IsValid():
target = self.dbg.GetDummyTarget()
eval_result = target.EvaluateExpression(expr, options)
value_check = ValueCheck(type=result_type, value=result_value,
summary=result_summary, children=result_children)
value_check.check_value(self, eval_result, str(eval_result))
return eval_result
def expect_var_path(
Evaluates the given variable path and verifies the result.
See also 'frame variable' and SBFrame.GetValueForVariablePath.
:param var_path: The variable path as a string.
:param summary: The summary that the variable should have. None if the summary should not be checked.
:param value: The value that the variable should have. None if the value should not be checked.
:param type: The type that the variable result should have. None if the type should not be checked.
:param children: The expected children of the variable as a list of ValueChecks.
None if the children shouldn't be checked.
self.assertTrue(var_path.strip() == var_path,
"Expression contains trailing/leading whitespace: '" + var_path + "'")
frame = self.frame()
eval_result = frame.GetValueForVariablePath(var_path)
value_check = ValueCheck(type=type, value=value,
summary=summary, children=children)
value_check.check_value(self, eval_result, str(eval_result))
return eval_result
"""Assert that an lldb.SBError is in the "success" state."""
def assertSuccess(self, obj, msg=None):
if not obj.Success():
error = obj.GetCString(),
"'{}' is not success".format(error)))
"""Assert that a command return object is successful"""
def assertCommandReturn(self, obj, msg=None):
if not obj.Succeeded():
error = obj.GetError(),
"'{}' is not success".format(error)))
"""Assert two states are equal"""
def assertState(self, first, second, msg=None):
if first != second:
error = "{} ({}) != {} ({})".format(
lldbutil.state_type_to_str(first), first,
lldbutil.state_type_to_str(second), second), error))
"""Assert two stop reasons are equal"""
def assertStopReason(self, first, second, msg=None):
if first != second:
error = "{} ({}) != {} ({})".format(
lldbutil.stop_reason_to_str(first), first,
lldbutil.stop_reason_to_str(second), second), error))
def createTestTarget(self, file_path=None, msg=None,
Creates a target from the file found at the given file path.
Asserts that the resulting target is valid.
:param file_path: The file path that should be used to create the target.
The default argument opens the current default test
executable in the current test directory.
:param msg: A custom error message.
if file_path is None:
file_path = self.getBuildArtifact("a.out")
error = lldb.SBError()
triple = ""
platform = ""
target = self.dbg.CreateTarget(file_path, triple, platform,
load_dependent_modules, error)
if error.Fail():
err = "Couldn't create target for path '{}': {}".format(file_path,
str(error)), err))
self.assertTrue(target.IsValid(), "Got invalid target without error")
return target
# =================================================
# Misc. helper methods for debugging test execution
# =================================================
def DebugSBValue(self, val):
"""Debug print a SBValue object, if traceAlways is True."""
from .lldbutil import value_type_to_str
if not traceAlways:
err = sys.stderr
err.write(val.GetName() + ":\n")
err.write('\t' + "TypeName -> " + val.GetTypeName() + '\n')
err.write('\t' + "ByteSize -> " +
str(val.GetByteSize()) + '\n')
err.write('\t' + "NumChildren -> " +
str(val.GetNumChildren()) + '\n')
err.write('\t' + "Value -> " + str(val.GetValue()) + '\n')
err.write('\t' + "ValueAsUnsigned -> " +
str(val.GetValueAsUnsigned()) + '\n')
'\t' +
"ValueType -> " +
val.GetValueType()) +
err.write('\t' + "Summary -> " + str(val.GetSummary()) + '\n')
err.write('\t' + "IsPointerType -> " +
str(val.TypeIsPointerType()) + '\n')
err.write('\t' + "Location -> " + val.GetLocation() + '\n')
def DebugSBType(self, type):
"""Debug print a SBType object, if traceAlways is True."""
if not traceAlways:
err = sys.stderr
err.write(type.GetName() + ":\n")
err.write('\t' + "ByteSize -> " +
str(type.GetByteSize()) + '\n')
err.write('\t' + "IsAggregateType -> " +
str(type.IsAggregateType()) + '\n')
err.write('\t' + "IsPointerType -> " +
str(type.IsPointerType()) + '\n')
err.write('\t' + "IsReferenceType -> " +
str(type.IsReferenceType()) + '\n')
def DebugPExpect(self, child):
"""Debug the spwaned pexpect object."""
if not traceAlways:
def RemoveTempFile(cls, file):
if os.path.exists(file):
# On Windows, the first attempt to delete a recently-touched file can fail
# because of a race with antimalware scanners. This function will detect a
# failure and retry.
def remove_file(file, num_retries=1, sleep_duration=0.5):
for i in range(num_retries + 1):
return True
return False