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they don't seem to be used? removing.

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Erin 2022-12-08 21:25:49 +01:00 committed by ondra05
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commit 58046c3c7b
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46
TODO.md
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# AbleOS
## General
- [ ] Improve EXT2
- [ ] Remove x86 specific code and refine the boot process
## Capabilities
A new process should not have any capabilities at all until it is given them or requests them and is approved.
- [ ] Filesystem cap
- [ ] Create a new filesystem
- [ ] Unmount/Mount a filesystem
- [ ] read a file
- [ ] write a file
- [ ] delete a file
- [ ] Network cap
- [ ] open/close socket
- [ ] bind/unbind socket
- [ ] Manage Process cap
- [ ] spawn Process cap
- [ ] kill Process cap
## Riscv
## ARM
- [ ] Get arm-version booting on real hardware
## Drivers
- [ ] Slim down driver specific program code
- [ ] Remove entry/exit functions for drivers
## Filesystem
- [ ] Create a vfs that ties into the capability system
- [ ] Remote home directory
- [ ] local file caching
- [ ] remote file changes
- [ ] Update file if the remote file changes
# Tooling
## Repbuild
- [ ] make generation of the ext2 image possible

243
qmp.py
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# QEMU Monitor Protocol Python class
#
# Copyright (C) 2009, 2010 Red Hat Inc.
#
# Authors:
# Luiz Capitulino <lcapitulino@redhat.com>
#
# This work is licensed under the terms of the GNU GPL, version 2. See
# the COPYING file in the top-level directory.
import json
import errno
import socket
import logging
class QMPError(Exception):
pass
class QMPConnectError(QMPError):
pass
class QMPCapabilitiesError(QMPError):
pass
class QMPTimeoutError(QMPError):
pass
class QEMUMonitorProtocol(object):
#: Logger object for debugging messages
logger = logging.getLogger('QMP')
#: Socket's error class
error = socket.error
#: Socket's timeout
timeout = socket.timeout
def __init__(self, address, server=False):
"""
Create a QEMUMonitorProtocol class.
@param address: QEMU address, can be either a unix socket path (string)
or a tuple in the form ( address, port ) for a TCP
connection
@param server: server mode listens on the socket (bool)
@raise socket.error on socket connection errors
@note No connection is established, this is done by the connect() or
accept() methods
"""
self.__events = []
self.__address = address
self.__sock = self.__get_sock()
self.__sockfile = None
if server:
self.__sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
self.__sock.bind(self.__address)
self.__sock.listen(1)
def __get_sock(self):
if isinstance(self.__address, tuple):
family = socket.AF_INET
else:
family = socket.AF_UNIX
return socket.socket(family, socket.SOCK_STREAM)
def __negotiate_capabilities(self):
greeting = self.__json_read()
if greeting is None or "QMP" not in greeting:
raise QMPConnectError
# Greeting seems ok, negotiate capabilities
resp = self.cmd('qmp_capabilities')
if "return" in resp:
return greeting
raise QMPCapabilitiesError
def __json_read(self, only_event=False):
while True:
data = self.__sockfile.readline()
if not data:
return
resp = json.loads(data)
if 'event' in resp:
self.logger.debug("<<< %s", resp)
self.__events.append(resp)
if not only_event:
continue
return resp
def __get_events(self, wait=False):
"""
Check for new events in the stream and cache them in __events.
@param wait (bool): block until an event is available.
@param wait (float): If wait is a float, treat it as a timeout value.
@raise QMPTimeoutError: If a timeout float is provided and the timeout
period elapses.
@raise QMPConnectError: If wait is True but no events could be
retrieved or if some other error occurred.
"""
# Check for new events regardless and pull them into the cache:
self.__sock.setblocking(0)
try:
self.__json_read()
except socket.error as err:
if err[0] == errno.EAGAIN:
# No data available
pass
self.__sock.setblocking(1)
# Wait for new events, if needed.
# if wait is 0.0, this means "no wait" and is also implicitly false.
if not self.__events and wait:
if isinstance(wait, float):
self.__sock.settimeout(wait)
try:
ret = self.__json_read(only_event=True)
except socket.timeout:
raise QMPTimeoutError("Timeout waiting for event")
except:
raise QMPConnectError("Error while reading from socket")
if ret is None:
raise QMPConnectError("Error while reading from socket")
self.__sock.settimeout(None)
def connect(self, negotiate=True):
"""
Connect to the QMP Monitor and perform capabilities negotiation.
@return QMP greeting dict
@raise socket.error on socket connection errors
@raise QMPConnectError if the greeting is not received
@raise QMPCapabilitiesError if fails to negotiate capabilities
"""
self.__sock.connect(self.__address)
self.__sockfile = self.__sock.makefile()
if negotiate:
return self.__negotiate_capabilities()
def accept(self):
"""
Await connection from QMP Monitor and perform capabilities negotiation.
@return QMP greeting dict
@raise socket.error on socket connection errors
@raise QMPConnectError if the greeting is not received
@raise QMPCapabilitiesError if fails to negotiate capabilities
"""
self.__sock.settimeout(15)
self.__sock, _ = self.__sock.accept()
self.__sockfile = self.__sock.makefile()
return self.__negotiate_capabilities()
def cmd_obj(self, qmp_cmd):
"""
Send a QMP command to the QMP Monitor.
@param qmp_cmd: QMP command to be sent as a Python dict
@return QMP response as a Python dict or None if the connection has
been closed
"""
self.logger.debug(">>> %s", qmp_cmd)
try:
self.__sock.sendall(json.dumps(qmp_cmd).encode('utf-8'))
except socket.error as err:
if err[0] == errno.EPIPE:
return
raise socket.error(err)
resp = self.__json_read()
self.logger.debug("<<< %s", resp)
return resp
def cmd(self, name, args=None, cmd_id=None):
"""
Build a QMP command and send it to the QMP Monitor.
@param name: command name (string)
@param args: command arguments (dict)
@param cmd_id: command id (dict, list, string or int)
"""
qmp_cmd = {'execute': name}
if args:
qmp_cmd['arguments'] = args
if cmd_id:
qmp_cmd['id'] = cmd_id
return self.cmd_obj(qmp_cmd)
def command(self, cmd, **kwds):
"""
Build and send a QMP command to the monitor, report errors if any
"""
ret = self.cmd(cmd, kwds)
if "error" in ret:
raise Exception(ret['error']['desc'])
return ret['return']
def pull_event(self, wait=False):
"""
Pulls a single event.
@param wait (bool): block until an event is available.
@param wait (float): If wait is a float, treat it as a timeout value.
@raise QMPTimeoutError: If a timeout float is provided and the timeout
period elapses.
@raise QMPConnectError: If wait is True but no events could be
retrieved or if some other error occurred.
@return The first available QMP event, or None.
"""
self.__get_events(wait)
if self.__events:
return self.__events.pop(0)
return None
def get_events(self, wait=False):
"""
Get a list of available QMP events.
@param wait (bool): block until an event is available.
@param wait (float): If wait is a float, treat it as a timeout value.
@raise QMPTimeoutError: If a timeout float is provided and the timeout
period elapses.
@raise QMPConnectError: If wait is True but no events could be
retrieved or if some other error occurred.
@return The list of available QMP events.
"""
self.__get_events(wait)
return self.__events
def clear_events(self):
"""
Clear current list of pending events.
"""
self.__events = []
def close(self):
self.__sock.close()
self.__sockfile.close()
def settimeout(self, timeout):
self.__sock.settimeout(timeout)
def get_sock_fd(self):
return self.__sock.fileno()
def is_scm_available(self):
return self.__sock.family == socket.AF_UNIX

118
qprofiler.py
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#!/usr/bin/python
#
# QProfiler is a QEMU profiler based on QMP
#
# Copyright (c) 2019-2022 Matias Vara <matiasevara@gmail.com>
# All Rights Reserved
#
# 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/>.
#
from __future__ import print_function
import sys, os, re
from qmp import QEMUMonitorProtocol
from time import sleep
import subprocess
def main(args):
path = None
filename = None
# duration of the test in seconds
duration = 5
# sampling frequency in seconds
frequency = 0.05
while len(args):
arg = args[0]
if arg.startswith('--'):
arg = arg[2:]
if arg.find('=') == -1:
value = True
else:
arg, value = arg.split('=', 1)
if arg in ['path']:
if type(value) == str:
path = value
elif arg in ['duration']:
duration = int(value)
elif arg in ['frequency']:
frequency = float(value)
elif arg in ['filename']:
filename = value
else:
print('Unknown argument "%s"' % arg)
return 1
args = args[1:]
else:
break
if not path:
print("Path isn't set, use --path=qmp-monitor-address")
return 1
def do_command(srv, cmd, **kwds):
rsp = srv.cmd(cmd, kwds)
if 'error' in rsp:
raise Exception(rsp['error']['desc'])
return rsp['return']
srv = QEMUMonitorProtocol(path)
srv.connect()
arguments = {}
command = 'human-monitor-command'
r = int(duration // frequency)
rip_hash = {}
for i in range(r):
arguments['command-line'] = 'info registers'
rsp = do_command(srv, command, **arguments)
regs = re.search(r'RIP=([\w]+)\s', rsp)
rip = regs.group(1)
if rip in rip_hash:
rip_hash[rip] += 1
else:
rip_hash[rip] = 1
sleep(frequency)
srv.close()
rip_hash_name = {}
for i in rip_hash:
with open(os.devnull, 'w') as devnull:
# pass
tmp = subprocess.check_output("addr2line --demangle -p -s -f -e "
+ filename
+ " "
+ i , shell=True, stderr=devnull).rstrip()
if tmp in rip_hash_name:
rip_hash_name[tmp] += rip_hash[i]
else:
rip_hash_name[tmp] = rip_hash[i]
for i in rip_hash_name:
print('{:>8} {}'.format(rip_hash_name[i], i))
if __name__ == '__main__':
sys.exit(main(sys.argv[1:]))