Source/JavaScriptCore/offlineasm/generate_offset_extractor.rb

   1 #!/usr/bin/env ruby
   2
   3 # Copyright (C) 2011-2018 Apple Inc. All rights reserved.
   4 #
   5 # Redistribution and use in source and binary forms, with or without
   6 # modification, are permitted provided that the following conditions
   7 # are met:
   8 # 1. Redistributions of source code must retain the above copyright
   9 #    notice, this list of conditions and the following disclaimer.
  10 # 2. Redistributions in binary form must reproduce the above copyright
  11 #    notice, this list of conditions and the following disclaimer in the
  12 #    documentation and/or other materials provided with the distribution.
  13 #
  14 # THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
  15 # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  16 # THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  17 # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
  18 # BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  19 # CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  20 # SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  21 # INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  22 # CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  23 # ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  24 # THE POSSIBILITY OF SUCH DAMAGE.
  25
  26 $: << File.dirname(__FILE__)
  27
  28 require "config"
  29 require "backends"
  30 require "digest/sha1"
  31 require "offsets"
  32 require "parser"
  33 require "self_hash"
  34 require "settings"
  35 require "transform"
  36
  37 IncludeFile.processIncludeOptions()
  38
  39 inputFlnm = ARGV.shift
  40 settingsFlnm = ARGV.shift
  41 outputFlnm = ARGV.shift
  42
  43 validBackends = canonicalizeBackendNames(ARGV.shift.split(/[,\s]+/))
  44 includeOnlyBackends(validBackends)
  45
  46 begin
  47     configurationList = configurationIndices(settingsFlnm)
  48 rescue MissingMagicValuesException
  49     $stderr.puts "OffsetExtractor: No magic values found. Skipping offsets extractor file generation."
  50     exit 1
  51 end
  52
  53 def emitMagicNumber
  54     OFFSET_MAGIC_NUMBERS.each {
  55         | number |
  56         $output.puts "unsigned(#{number}),"
  57     }
  58 end
  59
  60 configurationHash = Digest::SHA1.hexdigest(configurationList.join(' '))
  61 inputHash = "// OffsetExtractor input hash: #{parseHash(inputFlnm)} #{configurationHash} #{selfHash}"
  62
  63 if FileTest.exist? outputFlnm
  64     File.open(outputFlnm, "r") {
  65         | inp |
  66         firstLine = inp.gets
  67         if firstLine and firstLine.chomp == inputHash
  68             $stderr.puts "OffsetExtractor: Nothing changed."
  69             exit 0
  70         end
  71     }
  72 end
  73
  74 ast = parse(inputFlnm)
  75 settingsCombinations = computeSettingsCombinations(ast)
  76
  77 File.open(outputFlnm, "w") {
  78     | outp |
  79     $output = outp
  80     outp.puts inputHash
  81
  82     outp.puts "static const int64_t offsetExtractorTable[] = {"
  83     configurationList.each {
  84         | configIndex |
  85         forSettings(settingsCombinations[configIndex], ast) {
  86             | concreteSettings, lowLevelAST, backend |
  87
  88             offsetsList = offsetsList(lowLevelAST)
  89             sizesList = sizesList(lowLevelAST)
  90             constsList = constsList(lowLevelAST)
  91
  92             emitCodeInConfiguration(concreteSettings, lowLevelAST, backend) {
  93                 OFFSET_HEADER_MAGIC_NUMBERS.each {
  94                     | number |
  95                     outp.puts "unsigned(#{number}),"
  96                 }
  97
  98                 emitMagicNumber
  99                 outp.puts "#{configIndex},"
 100                 offsetsList.each {
 101                     | offset |
 102                     emitMagicNumber
 103                     outp.puts "OFFLINE_ASM_OFFSETOF(#{offset.struct}, #{offset.field}),"
 104                 }
 105                 sizesList.each {
 106                     | sizeof |
 107                     emitMagicNumber
 108                     outp.puts "sizeof(#{sizeof.struct}),"
 109                 }
 110                 constsList.each {
 111                     | const |
 112                     emitMagicNumber
 113                     outp.puts "static_cast<int64_t>(#{const.value}),"
 114                 }
 115             }
 116         }
 117     }
 118     outp.puts "};"
 119
 120 }