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98 lines
3.5 KiB
98 lines
3.5 KiB
4 months ago
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#!/usr/bin/env python3
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#
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# Copyright (C) 2016 The Android Open Source Project
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import sys, re, os
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from io import StringIO
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SCRIPT_DIR = os.path.dirname(sys.argv[0])
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# This file is included verbatim at the start of the in-memory python script.
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SCRIPT_SETUP_CODE = SCRIPT_DIR + "/common/gen_setup.py"
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INTERP_DEFS_FILE = SCRIPT_DIR + "/../../../libdexfile/dex/dex_instruction_list.h"
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NUM_PACKED_OPCODES = 256
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# Extract an ordered list of instructions from the VM sources. We use the
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# "goto table" definition macro, which has exactly NUM_PACKED_OPCODES entries.
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def getOpcodeList():
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opcodes = []
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opcode_fp = open(INTERP_DEFS_FILE)
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opcode_re = re.compile(r"^\s*V\((....), (\w+),.*", re.DOTALL)
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for line in opcode_fp:
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match = opcode_re.match(line)
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if not match:
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continue
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opcodes.append("op_" + match.group(2).lower())
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opcode_fp.close()
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if len(opcodes) != NUM_PACKED_OPCODES:
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print("ERROR: found ", len(opcodes), " opcodes in Interp.h (expected ", NUM_PACKED_OPCODES, ")")
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raise SyntaxError("bad opcode count")
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return opcodes
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indent_re = re.compile(r"^%( *)")
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# Finds variable references in text: $foo or ${foo}
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escape_re = re.compile(r'''
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(?<!\$) # Look-back: must not be preceded by another $.
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\$
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(\{)? # May be enclosed by { } pair.
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(?P<name>\w+) # Save the symbol in named group.
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(?(1)\}) # Expect } if and only if { was present.
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''', re.VERBOSE)
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def generate_script(output_filename, input_filenames):
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# Create new python script and write the initial setup code.
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script = StringIO() # File-like in-memory buffer.
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script.write("# DO NOT EDIT: This file was generated by gen-mterp.py.\n")
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script.write(open(SCRIPT_SETUP_CODE, "r").read())
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script.write("def opcodes():\n")
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for i, opcode in enumerate(getOpcodeList()):
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script.write(' write_opcode({0}, "{1}", {1})\n'.format(i, opcode))
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# Read all template files and translate them into python code.
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for input_filename in sorted(input_filenames):
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lines = open(input_filename, "r").readlines()
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indent = ""
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for line in lines:
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line = line.rstrip()
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if line.startswith("%"):
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script.write(line.lstrip("%") + "\n")
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indent = indent_re.match(line).group(1)
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if line.endswith(":"):
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indent += " "
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else:
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line = escape_re.sub(r"''' + \g<name> + '''", line)
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line = line.replace("\\", "\\\\")
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line = line.replace("$$", "$")
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script.write(indent + "write_line('''" + line + "''')\n")
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script.write("\n")
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script.write("generate('''" + output_filename + "''')\n")
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script.seek(0)
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return script.read()
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if len(sys.argv) <= 3:
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print("Usage: output_file input_file(s)")
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sys.exit(1)
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# Generate the script and execute it.
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output_filename = sys.argv[1]
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input_filenames = sys.argv[2:]
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script_filename = output_filename + ".py"
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script = generate_script(output_filename, input_filenames)
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with open(script_filename, "w") as script_file:
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script_file.write(script) # Write to disk for debugging.
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exec(compile(script, script_filename, mode='exec'))
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