Mercurial > hg > Members > aka > jupyter_CbC_kernel

annotate jupyter_CbC_kernel/kernel.py @ 85:4d7d24e87c88

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fix gcc option rm -std=c11
author musou_aka <>
date Mon, 25 Jun 2018 23:26:36 +0900
parents 371a7388a93a
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 from queue import Queue
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2 from threading import Thread
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3
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4 from ipykernel.kernelbase import Kernel
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5 import re
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6 import subprocess
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7 import tempfile
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8 import os
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9 import os.path as path
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11
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12 class RealTimeSubprocess(subprocess.Popen):
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13 """
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14 A subprocess that allows to read its stdout and stderr in real time
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15 """
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16
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17 def __init__(self, cmd, write_to_stdout, write_to_stderr):
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18 """
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19 :param cmd: the command to execute
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20 :param write_to_stdout: a callable that will be called with chunks of data from stdout
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21 :param write_to_stderr: a callable that will be called with chunks of data from stderr
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22 """
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23 self._write_to_stdout = write_to_stdout
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24 self._write_to_stderr = write_to_stderr
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25
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26 super().__init__(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, bufsize=0)
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28 self._stdout_queue = Queue()
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29 self._stdout_thread = Thread(target=RealTimeSubprocess._enqueue_output, args=(self.stdout, self._stdout_queue))
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30 self._stdout_thread.daemon = True
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31 self._stdout_thread.start()
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32
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33 self._stderr_queue = Queue()
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34 self._stderr_thread = Thread(target=RealTimeSubprocess._enqueue_output, args=(self.stderr, self._stderr_queue))
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35 self._stderr_thread.daemon = True
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36 self._stderr_thread.start()
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37
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38 @staticmethod
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39 def _enqueue_output(stream, queue):
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40 """
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41 Add chunks of data from a stream to a queue until the stream is empty.
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42 """
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43 for line in iter(lambda: stream.read(4096), b''):
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44 queue.put(line)
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45 stream.close()
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46
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47 def write_contents(self):
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48 """
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49 Write the available content from stdin and stderr where specified when the instance was created
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50 :return:
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51 """
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53 def read_all_from_queue(queue):
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54 res = b''
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55 size = queue.qsize()
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56 while size != 0:
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57 res += queue.get_nowait()
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58 size -= 1
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59 return res
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61 stdout_contents = read_all_from_queue(self._stdout_queue)
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62 if stdout_contents:
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63 self._write_to_stdout(stdout_contents)
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64 stderr_contents = read_all_from_queue(self._stderr_queue)
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65 if stderr_contents:
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66 self._write_to_stderr(stderr_contents)
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68
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69 class CbCKernel(Kernel):
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70 implementation = 'jupyter_CbC_kernel'
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71 implementation_version = '1.0'
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72 language = 'CbC'
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73 language_version = 'C11'
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74 language_info = {'name': 'C',
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75 'mimetype': 'text/plain',
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76 'file_extension': '.c'}
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77 banner = "CbC kernel.\n" \
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78 "Uses gcc, compiles in C11, and creates source code files and executables in temporary folder.\n"
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79
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80 def __init__(self, *args, **kwargs):
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81 super(CbCKernel, self).__init__(*args, **kwargs)
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82 self.files = []
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83 mastertemp = tempfile.mkstemp(suffix='.out')
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84 os.close(mastertemp[0])
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85 self.master_path = mastertemp[1]
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86 filepath = path.join(path.dirname(path.realpath(__file__)), 'resources', 'master.c')
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87 subprocess.call(['gcc', filepath, '-rdynamic', '-ldl', '-o', self.master_path])
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88
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89 def cleanup_files(self):
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90 """Remove all the temporary files created by the kernel"""
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91 for file in self.files:
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92 os.remove(file)
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93 os.remove(self.master_path)
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94
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95 def new_temp_file(self, **kwargs):
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96 """Create a new temp file to be deleted when the kernel shuts down"""
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97 # We don't want the file to be deleted when closed, but only when the kernel stops
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98 kwargs['delete'] = False
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99 kwargs['mode'] = 'w'
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100 file = tempfile.NamedTemporaryFile(**kwargs)
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101 self.files.append(file.name)
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102 return file
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103
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104 def _write_to_stdout(self, contents):
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105 self.send_response(self.iopub_socket, 'stream', {'name': 'stdout', 'text': contents})
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106
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107 def _write_to_stderr(self, contents):
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108 self.send_response(self.iopub_socket, 'stream', {'name': 'stderr', 'text': contents})
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109
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110 def create_jupyter_subprocess(self, cmd):
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111 return RealTimeSubprocess(cmd,
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112 lambda contents: self._write_to_stdout(contents.decode()),
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113 lambda contents: self._write_to_stderr(contents.decode()))
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114
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115 def compile_with_gcc(self, source_filename, binary_filename, cflags=None, ldflags=None):
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116 cflags = ['-fPIC', '-shared', '-rdynamic'] + cflags
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117 args = ['gcc', source_filename] + cflags + ['-o', binary_filename] + ldflags
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118 return self.create_jupyter_subprocess(args)
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119
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120 def _filter_magics(self, code):
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121
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122 magics = {'cflags': [],
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123 'ldflags': [],
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124 'args': []}
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125
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126 for line in code.splitlines():
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127 if line.startswith('//%'):
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128 key, value = line[3:].split(":", 2)
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129 key = key.strip().lower()
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130
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131 if key in ['ldflags', 'cflags']:
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132 for flag in value.split():
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133 magics[key] += [flag]
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134 elif key == "args":
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135 # Split arguments respecting quotes
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136 for argument in re.findall(r'(?:[^\s,"]|"(?:\\.|[^"])*")+', value):
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137 magics['args'] += [argument.strip('"')]
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138
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139 return magics
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140
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141 def do_execute(self, code, silent, store_history=True,
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142 user_expressions=None, allow_stdin=False):
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143
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144 magics = self._filter_magics(code)
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145
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146 with self.new_temp_file(suffix='.c') as source_file:
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147 source_file.write(code)
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148 source_file.flush()
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149 with self.new_temp_file(suffix='.out') as binary_file:
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150 p = self.compile_with_gcc(source_file.name, binary_file.name, magics['cflags'], magics['ldflags'])
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151 while p.poll() is None:
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152 p.write_contents()
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153 p.write_contents()
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154 if p.returncode != 0: # Compilation failed
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155 self._write_to_stderr(
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156 "[CbC kernel] GCC exited with code {}, the executable will not be executed".format(
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157 p.returncode))
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158 return {'status': 'ok', 'execution_count': self.execution_count, 'payload': [],
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159 'user_expressions': {}}
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160
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161 p = self.create_jupyter_subprocess([self.master_path, binary_file.name] + magics['args'])
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162 while p.poll() is None:
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163 p.write_contents()
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164 p.write_contents()
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165
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166 if p.returncode != 0:
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167 self._write_to_stderr("[CbC kernel] Executable exited with code {}".format(p.returncode))
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168 return {'status': 'ok', 'execution_count': self.execution_count, 'payload': [], 'user_expressions': {}}
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169
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170 def do_shutdown(self, restart):
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171 """Cleanup the created source code files and executables when shutting down the kernel"""
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172 self.cleanup_files()