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File Content: `init.py`

# Copyright (C) 2010-2022 Free Software Foundation, Inc.

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

import traceback
import os
import sys
import _gdb
from contextlib import contextmanager

# Python 3 moved "reload"
if sys.version_info >= (3, 4):
    from importlib import reload
elif sys.version_info[0] > 2:
    from imp import reload

from _gdb import *


class _GdbFile(object):
    # These two are needed in Python 3
    encoding = "UTF-8"
    errors = "strict"

    def close(self):
        # Do nothing.
        return None

    def isatty(self):
        return False

    def writelines(self, iterable):
        for line in iterable:
            self.write(line)

    def flush(self):
        flush()


class _GdbOutputFile(_GdbFile):
    def write(self, s):
        write(s, stream=STDOUT)


sys.stdout = _GdbOutputFile()


class _GdbOutputErrorFile(_GdbFile):
    def write(self, s):
        write(s, stream=STDERR)


sys.stderr = _GdbOutputErrorFile()

# Default prompt hook does nothing.
prompt_hook = None

# Ensure that sys.argv is set to something.
# We do not use PySys_SetArgvEx because it did not appear until 2.6.6.
sys.argv = [""]

# Initial pretty printers.
pretty_printers = []

# Initial type printers.
type_printers = []
# Initial xmethod matchers.
xmethods = []
# Initial frame filters.
frame_filters = {}
# Initial frame unwinders.
frame_unwinders = []


def _execute_unwinders(pending_frame):
    """Internal function called from GDB to execute all unwinders.

    Runs each currently enabled unwinder until it finds the one that
    can unwind given frame.

    Arguments:
        pending_frame: gdb.PendingFrame instance.

    Returns:
        Tuple with:

          [0] gdb.UnwindInfo instance
          [1] Name of unwinder that claimed the frame (type `str`)

        or None, if no unwinder has claimed the frame.
    """
    for objfile in objfiles():
        for unwinder in objfile.frame_unwinders:
            if unwinder.enabled:
                unwind_info = unwinder(pending_frame)
                if unwind_info is not None:
                    return (unwind_info, unwinder.name)

    for unwinder in current_progspace().frame_unwinders:
        if unwinder.enabled:
            unwind_info = unwinder(pending_frame)
            if unwind_info is not None:
                return (unwind_info, unwinder.name)

    for unwinder in frame_unwinders:
        if unwinder.enabled:
            unwind_info = unwinder(pending_frame)
            if unwind_info is not None:
                return (unwind_info, unwinder.name)

    return None


def _execute_file(filepath):
    """This function is used to replace Python 2's PyRun_SimpleFile.

    Loads and executes the given file.

    We could use the runpy module, but its documentation says:
    "Furthermore, any functions and classes defined by the executed code are
    not guaranteed to work correctly after a runpy function has returned."
    """
    globals = sys.modules["__main__"].__dict__
    set_file = False
    # Set file (if not set) so that the imported file can use it (e.g. to
    # access file-relative paths). This matches what PyRun_SimpleFile does.
    if not hasattr(globals, "__file__"):
        globals["__file__"] = filepath
        set_file = True
    try:
        with open(filepath, "rb") as file:
            # We pass globals also as locals to match what Python does
            # in PyRun_SimpleFile.
            compiled = compile(file.read(), filepath, "exec")
            exec(compiled, globals, globals)
    finally:
        if set_file:
            del globals["__file__"]


# Convenience variable to GDB's python directory
PYTHONDIR = os.path.dirname(os.path.dirname(__file__))

# Auto-load all functions/commands.

# Packages to auto-load.

packages = ["function", "command", "printer"]

# pkgutil.iter_modules is not available prior to Python 2.6.  Instead,
# manually iterate the list, collating the Python files in each module
# path.  Construct the module name, and import.


def _auto_load_packages():
    for package in packages:
        location = os.path.join(os.path.dirname(__file__), package)
        if os.path.exists(location):
            py_files = filter(
                lambda x: x.endswith(".py") and x != "__init__.py", os.listdir(location)
            )

            for py_file in py_files:
                # Construct from foo.py, gdb.module.foo
                modname = "%s.%s.%s" % (__name__, package, py_file[:-3])
                try:
                    if modname in sys.modules:
                        # reload modules with duplicate names
                        reload(__import__(modname))
                    else:
                        __import__(modname)
                except:
                    sys.stderr.write(traceback.format_exc() + "\n")


_auto_load_packages()


def GdbSetPythonDirectory(dir):
    """Update sys.path, reload gdb and auto-load packages."""
    global PYTHONDIR

    try:
        sys.path.remove(PYTHONDIR)
    except ValueError:
        pass
    sys.path.insert(0, dir)

    PYTHONDIR = dir

    # note that reload overwrites the gdb module without deleting existing
    # attributes
    reload(__import__(__name__))
    _auto_load_packages()


def current_progspace():
    "Return the current Progspace."
    return selected_inferior().progspace


def objfiles():
    "Return a sequence of the current program space's objfiles."
    return current_progspace().objfiles()


def solib_name(addr):
    """solib_name (Long) -> String.\n\
Return the name of the shared library holding a given address, or None."""
    return current_progspace().solib_name(addr)


def block_for_pc(pc):
    "Return the block containing the given pc value, or None."
    return current_progspace().block_for_pc(pc)


def find_pc_line(pc):
    """find_pc_line (pc) -> Symtab_and_line.
    Return the gdb.Symtab_and_line object corresponding to the pc value."""
    return current_progspace().find_pc_line(pc)


def set_parameter(name, value):
    """Set the GDB parameter NAME to VALUE."""
    execute("set " + name + " " + str(value), to_string=True)


@contextmanager
def with_parameter(name, value):
    """Temporarily set the GDB parameter NAME to VALUE.
    Note that this is a context manager."""
    old_value = parameter(name)
    set_parameter(name, value)
    try:
        # Nothing that useful to return.
        yield None
    finally:
        set_parameter(name, old_value)
Name	Size	Permission
command	---	0755
function	---	0755
printer	---	0755
FrameDecorator.py	10443 bytes	0644
FrameIterator.py	1549 bytes	0644
__init__.py	7049 bytes	0644
frames.py	7958 bytes	0644
printing.py	10888 bytes	0644
prompt.py	4222 bytes	0644
styling.py	1652 bytes	0644
types.py	5516 bytes	0644
unwinder.py	3110 bytes	0644
xmethod.py	11086 bytes	0644
File Content: __init__.py

File Content: `init.py`
