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| 1 #!/usr/bin/python | |
| 2 # Copyright 2008, Google Inc. | |
| 3 # 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 are | |
| 7 # met: | |
| 8 # | |
| 9 # * Redistributions of source code must retain the above copyright | |
| 10 # notice, this list of conditions and the following disclaimer. | |
| 11 # * Redistributions in binary form must reproduce the above | |
| 12 # copyright notice, this list of conditions and the following disclaimer | |
| 13 # in the documentation and/or other materials provided with the | |
| 14 # distribution. | |
| 15 # * Neither the name of Google Inc. nor the names of its | |
| 16 # contributors may be used to endorse or promote products derived from | |
| 17 # this software without specific prior written permission. | |
| 18 # | |
| 19 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 20 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 21 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 22 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
| 23 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 24 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
| 25 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 26 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 27 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 28 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 29 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 30 | |
| 31 # | |
| 32 """discmp.py - compare disassembler output | |
| 33 | |
| 34 This script compares output from the Native Client decoder to output | |
| 35 from GNU objdump to make sure they agree on instruction lengths. It | |
| 36 returns a zero status on success and non-zero on failure. | |
| 37 | |
| 38 | |
| 39 Usage: | |
| 40 discmp.py <ncdis-exe> <test-binary>* | |
| 41 """ | |
| 42 | |
| 43 import logging | |
| 44 import os | |
| 45 import re | |
| 46 import sys | |
| 47 | |
| 48 | |
| 49 def Usage(): | |
| 50 print("USAGE: discmp.py <ncdis-exe> <test-binary>*\n") | |
| 51 sys.exit(-1) | |
| 52 | |
| 53 class DisFile(object): | |
| 54 """Processes variants of disassembler output from various sources, | |
| 55 providing a list of instruction lengths, based on addresses.""" | |
| 56 | |
| 57 def __init__(self, stream): | |
| 58 self.fd = stream | |
| 59 self.lastline = None | |
| 60 self.lastaddr = None | |
| 61 self.thisaddr = None | |
| 62 self.thisline = None | |
| 63 # note we ignore lines that have only continuation bytes; | |
| 64 # no opcode | |
| 65 self.dislinefmt = re.compile("\s*([0-9a-f]+):\t(.*\t+.*)") | |
| 66 self.data16fmt = re.compile("\s*([0-9a-f]+):\s+66\s+data16") | |
| 67 self.waitfmt = re.compile("\s*([0-9a-f]+):\s+9b\s+[f]?wait") | |
| 68 | |
| 69 def NextDisInst(self): | |
| 70 while (True): | |
| 71 line = self.fd.readline() | |
| 72 if line == "": return 0, None | |
| 73 match = self.data16fmt.match(line) | |
| 74 if (match): | |
| 75 addr = match.group(1) | |
| 76 line = self.fd.readline() | |
| 77 match = self.dislinefmt.match(line) | |
| 78 return (int(addr, 16), | |
| 79 " " + addr + ":\t60 " + match.group(2) + "\n") | |
| 80 match = self.waitfmt.match(line) | |
| 81 if (match): | |
| 82 addr = match.group(1) | |
| 83 line = self.fd.readline() | |
| 84 match = self.dislinefmt.match(line) | |
| 85 return (int(addr, 16), | |
| 86 " " + addr + ":\t9b " + match.group(2) + "\n") | |
| 87 match = self.dislinefmt.match(line) | |
| 88 if (match): | |
| 89 return int(match.group(1), 16), line | |
| 90 | |
| 91 def NextInst(self): | |
| 92 if self.lastaddr is None: | |
| 93 self.lastaddr, self.lastline = self.NextDisInst() | |
| 94 else: | |
| 95 self.lastaddr = self.thisaddr | |
| 96 self.lastline = self.thisline | |
| 97 self.thisaddr, self.thisline = self.NextDisInst() | |
| 98 if self.thisline is None: | |
| 99 # don't know how long the last line was, so just return 1 | |
| 100 return (1, self.lastline) | |
| 101 if self.lastline is None: | |
| 102 return 0, None | |
| 103 else: | |
| 104 return (self.thisaddr - self.lastaddr, self.lastline) | |
| 105 | |
| 106 | |
| 107 def IsElfBinary(fname): | |
| 108 fd = open(fname) | |
| 109 iselfbinary = fd.readline().startswith("\x7fELF") | |
| 110 fd.close() | |
| 111 return iselfbinary | |
| 112 | |
| 113 | |
| 114 def CheckOneFile(fname, ncdis, objdump): | |
| 115 logging.info("processing %s", fname) | |
| 116 if not IsElfBinary(fname): | |
| 117 print("Error:", fname, "is not an ELF binary\nContinuing...") | |
| 118 return | |
| 119 df1 = DisFile(os.popen(objdump + " -dz " + fname)) | |
| 120 df2 = DisFile(os.popen(ncdis + " " + fname)) | |
| 121 instcount = 0 | |
| 122 while (1): | |
| 123 instcount += 1 | |
| 124 len1, line1 = df1.NextInst() | |
| 125 len2, line2 = df2.NextInst() | |
| 126 if line1 is None: break | |
| 127 if line2 is None: break | |
| 128 if (len1 != len2): | |
| 129 logging.error("inst length mistmatch %d != %d\n", len1, len2) | |
| 130 logging.error(line1) | |
| 131 logging.error(line2) | |
| 132 sys.exit(-1) | |
| 133 if line1 or line2: | |
| 134 logging.error("disasm output is different lengths\n") | |
| 135 sys.exit(-1) | |
| 136 logging.info("%s: %d instructions; 0 errors!\n", fname, instcount) | |
| 137 | |
| 138 | |
| 139 def main(argv): | |
| 140 logging.basicConfig(level=logging.DEBUG, | |
| 141 stream=sys.stdout) | |
| 142 ncdis = argv[1] | |
| 143 logging.info("using ncdis at: %s", ncdis) | |
| 144 objdump="objdump" | |
| 145 logging.info("using objdump at: %s", objdump) | |
| 146 for filename in argv[2:]: | |
| 147 if os.path.isdir(filename): | |
| 148 logging.info("traversing dir: %s", filename) | |
| 149 for dirpath, dirlist, filelist in os.walk(filename): | |
| 150 for fname in filelist: | |
| 151 CheckOneFile(os.path.join(dirpath, fname), ncdis, objdump) | |
| 152 else: | |
| 153 CheckOneFile(filename, ncdis, objdump) | |
| 154 return 0 | |
| 155 | |
| 156 if '__main__' == __name__: | |
| 157 sys.exit(main(sys.argv)) | |
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Chromium Code Reviews
Issue 625923004:
Delete old x86 validator. (Closed)
Base URL: svn://svn.chromium.org/native_client/trunk/src/native_client