lib/sanitizer_common/scripts/sancov.py - platform/external/compiler-rt - Git at Google

 #!/usr/bin/env python
 # Merge or print the coverage data collected by asan's coverage.
 # Input files are sequences of 4-byte integers.
 # We need to merge these integers into a set and then
 # either print them (as hex) or dump them into another file.
 import array
 import bisect
 import glob
 import os.path
 import struct
 import subprocess
 import sys

 prog_name = ""

 def Usage():
   print >> sys.stderr, "Usage: \n" + \
       " " + prog_name + " merge FILE [FILE...] > OUTPUT\n" \
       " " + prog_name + " print FILE [FILE...]\n" \
       " " + prog_name + " unpack FILE [FILE...]\n" \
       " " + prog_name + " rawunpack FILE [FILE ...]\n" \
       " " + prog_name + " missing BINARY < LIST_OF_PCS\n"
   exit(1)

 def CheckBits(bits):
   if bits != 32 and bits != 64:
     raise Exception("Wrong bitness: %d" % bits)

 def TypeCodeForBits(bits):
   CheckBits(bits)
   return 'L' if bits == 64 else 'I'

 kMagic32SecondHalf = 0xFFFFFF32;
 kMagic64SecondHalf = 0xFFFFFF64;
 kMagicFirstHalf    = 0xC0BFFFFF;

 def MagicForBits(bits):
   CheckBits(bits)
   if sys.byteorder == 'little':
     return [kMagic64SecondHalf if bits == 64 else kMagic32SecondHalf, kMagicFirstHalf]
   else:
     return [kMagicFirstHalf, kMagic64SecondHalf if bits == 64 else kMagic32SecondHalf]

 def ReadMagicAndReturnBitness(f, path):
   magic_bytes = f.read(8)
   magic_words = struct.unpack('II', magic_bytes);
   bits = 0
   idx = 1 if sys.byteorder == 'little' else 0
   if magic_words[idx] == kMagicFirstHalf:
     if magic_words[1-idx] == kMagic64SecondHalf:
       bits = 64
     elif magic_words[1-idx] == kMagic32SecondHalf:
       bits = 32
   if bits == 0:
     raise Exception('Bad magic word in %s' % path)
   return bits

 def ReadOneFile(path):
   with open(path, mode="rb") as f:
     f.seek(0, 2)
     size = f.tell()
     f.seek(0, 0)
     if size < 8:
       raise Exception('File %s is short (< 8 bytes)' % path)
     bits = ReadMagicAndReturnBitness(f, path)
     size -= 8
     s = array.array(TypeCodeForBits(bits), f.read(size))
   print >>sys.stderr, "%s: read %d %d-bit PCs from %s" % (prog_name, size * 8 / bits, bits, path)
   return s

 def Merge(files):
   s = set()
   for f in files:
     s = s.union(set(ReadOneFile(f)))
   print >> sys.stderr, "%s: %d files merged; %d PCs total" % \
     (prog_name, len(files), len(s))
   return sorted(s)

 def PrintFiles(files):
   if len(files) > 1:
     s = Merge(files)
   else:  # If there is just on file, print the PCs in order.
     s = ReadOneFile(files[0])
     print >> sys.stderr, "%s: 1 file merged; %d PCs total" % \
       (prog_name, len(s))
   for i in s:
     print "0x%x" % i

 def MergeAndPrint(files):
   if sys.stdout.isatty():
     Usage()
   s = Merge(files)
   bits = 32
   if max(s) > 0xFFFFFFFF:
     bits = 64
   array.array('I', MagicForBits(bits)).tofile(sys.stdout)
   a = array.array(TypeCodeForBits(bits), s)
   a.tofile(sys.stdout)


 def UnpackOneFile(path):
   with open(path, mode="rb") as f:
     print >> sys.stderr, "%s: unpacking %s" % (prog_name, path)
     while True:
       header = f.read(12)
       if not header: return
       if len(header) < 12:
         break
       pid, module_length, blob_size = struct.unpack('iII', header)
       module = f.read(module_length)
       blob = f.read(blob_size)
       assert(len(module) == module_length)
       assert(len(blob) == blob_size)
       extracted_file = "%s.%d.sancov" % (module, pid)
       print >> sys.stderr, "%s: extracting %s" % \
         (prog_name, extracted_file)
       # The packed file may contain multiple blobs for the same pid/module
       # pair. Append to the end of the file instead of overwriting.
       with open(extracted_file, 'ab') as f2:
         f2.write(blob)
     # fail
     raise Exception('Error reading file %s' % path)


 def Unpack(files):
   for f in files:
     UnpackOneFile(f)

 def UnpackOneRawFile(path, map_path):
   mem_map = []
   with open(map_path, mode="rt") as f_map:
     print >> sys.stderr, "%s: reading map %s" % (prog_name, map_path)
     bits = int(f_map.readline())
     if bits != 32 and bits != 64:
       raise Exception('Wrong bits size in the map')
     for line in f_map:
       parts = line.rstrip().split()
       mem_map.append((int(parts[0], 16),
                   int(parts[1], 16),
                   int(parts[2], 16),
                   ' '.join(parts[3:])))
   mem_map.sort(key=lambda m : m[0])
   mem_map_keys = [m[0] for m in mem_map]

   with open(path, mode="rb") as f:
     print >> sys.stderr, "%s: unpacking %s" % (prog_name, path)

     f.seek(0, 2)
     size = f.tell()
     f.seek(0, 0)
     pcs = array.array(TypeCodeForBits(bits), f.read(size))
     mem_map_pcs = [[] for i in range(0, len(mem_map))]

     for pc in pcs:
       if pc == 0: continue
       map_idx = bisect.bisect(mem_map_keys, pc) - 1
       (start, end, base, module_path) = mem_map[map_idx]
       assert pc >= start
       if pc >= end:
         print >> sys.stderr, "warning: %s: pc %x outside of any known mapping" % (prog_name, pc)
         continue
       mem_map_pcs[map_idx].append(pc - base)

     for ((start, end, base, module_path), pc_list) in zip(mem_map, mem_map_pcs):
       if len(pc_list) == 0: continue
       assert path.endswith('.sancov.raw')
       dst_path = module_path + '.' + os.path.basename(path)[:-4]
       print >> sys.stderr, "%s: writing %d PCs to %s" % (prog_name, len(pc_list), dst_path)
       arr = array.array(TypeCodeForBits(bits))
       arr.fromlist(sorted(pc_list))
       with open(dst_path, 'ab') as f2:
         array.array('I', MagicForBits(bits)).tofile(f2)
         arr.tofile(f2)

 def RawUnpack(files):
   for f in files:
     if not f.endswith('.sancov.raw'):
       raise Exception('Unexpected raw file name %s' % f)
     f_map = f[:-3] + 'map'
     UnpackOneRawFile(f, f_map)

 def GetInstrumentedPCs(binary):
   # This looks scary, but all it does is extract all offsets where we call:
   # - __sanitizer_cov() or __sanitizer_cov_with_check(),
   # - with call or callq,
   # - directly or via PLT.
   cmd = "objdump -d %s | " \
         "grep '^\s\+[0-9a-f]\+:.*\scall\(q\|\)\s\+[0-9a-f]\+ <__sanitizer_cov\(_with_check\|\)\(@plt\|\)>' | " \
         "grep '^\s\+[0-9a-f]\+' -o" % binary
   proc = subprocess.Popen(cmd, stdin=subprocess.PIPE, stdout=subprocess.PIPE,
                           shell=True)
   proc.stdin.close()
   # The PCs we get from objdump are off by 4 bytes, as they point to the
   # beginning of the callq instruction. Empirically this is true on x86 and
   # x86_64.
   return set(int(line.strip(), 16) + 4 for line in proc.stdout)

 def PrintMissing(binary):
   if not os.path.isfile(binary):
     raise Exception('File not found: %s' % binary)
   instrumented = GetInstrumentedPCs(binary)
   print >> sys.stderr, "%s: found %d instrumented PCs in %s" % (prog_name,
                                                                 len(instrumented),
                                                                 binary)
   covered = set(int(line, 16) for line in sys.stdin)
   print >> sys.stderr, "%s: read %d PCs from stdin" % (prog_name, len(covered))
   missing = instrumented - covered
   print >> sys.stderr, "%s: %d PCs missing from coverage" % (prog_name, len(missing))
   if (len(missing) > len(instrumented) - len(covered)):
     print >> sys.stderr, \
         "%s: WARNING: stdin contains PCs not found in binary" % prog_name
   for pc in sorted(missing):
     print "0x%x" % pc

 if __name__ == '__main__':
   prog_name = sys.argv[0]
   if len(sys.argv) <= 2:
     Usage();

   if sys.argv[1] == "missing":
     if len(sys.argv) != 3:
       Usage()
     PrintMissing(sys.argv[2])
     exit(0)

   file_list = []
   for f in sys.argv[2:]:
     file_list += glob.glob(f)
   if not file_list:
     Usage()

   if sys.argv[1] == "print":
     PrintFiles(file_list)
   elif sys.argv[1] == "merge":
     MergeAndPrint(file_list)
   elif sys.argv[1] == "unpack":
     Unpack(file_list)
   elif sys.argv[1] == "rawunpack":
     RawUnpack(file_list)
   else:
     Usage()
	#!/usr/bin/env python
	# Merge or print the coverage data collected by asan's coverage.
	# Input files are sequences of 4-byte integers.
	# We need to merge these integers into a set and then
	# either print them (as hex) or dump them into another file.
	import array
	import bisect
	import glob
	import os.path
	import struct
	import subprocess
	import sys

	prog_name = ""

	def Usage():
	print >> sys.stderr, "Usage: \n" + \
	" " + prog_name + " merge FILE [FILE...] > OUTPUT\n" \
	" " + prog_name + " print FILE [FILE...]\n" \
	" " + prog_name + " unpack FILE [FILE...]\n" \
	" " + prog_name + " rawunpack FILE [FILE ...]\n" \
	" " + prog_name + " missing BINARY < LIST_OF_PCS\n"
	exit(1)

	def CheckBits(bits):
	if bits != 32 and bits != 64:
	raise Exception("Wrong bitness: %d" % bits)

	def TypeCodeForBits(bits):
	CheckBits(bits)
	return 'L' if bits == 64 else 'I'

	kMagic32SecondHalf = 0xFFFFFF32;
	kMagic64SecondHalf = 0xFFFFFF64;
	kMagicFirstHalf = 0xC0BFFFFF;

	def MagicForBits(bits):
	CheckBits(bits)
	if sys.byteorder == 'little':
	return [kMagic64SecondHalf if bits == 64 else kMagic32SecondHalf, kMagicFirstHalf]
	else:
	return [kMagicFirstHalf, kMagic64SecondHalf if bits == 64 else kMagic32SecondHalf]

	def ReadMagicAndReturnBitness(f, path):
	magic_bytes = f.read(8)
	magic_words = struct.unpack('II', magic_bytes);
	bits = 0
	idx = 1 if sys.byteorder == 'little' else 0
	if magic_words[idx] == kMagicFirstHalf:
	if magic_words[1-idx] == kMagic64SecondHalf:
	bits = 64
	elif magic_words[1-idx] == kMagic32SecondHalf:
	bits = 32
	if bits == 0:
	raise Exception('Bad magic word in %s' % path)
	return bits

	def ReadOneFile(path):
	with open(path, mode="rb") as f:
	f.seek(0, 2)
	size = f.tell()
	f.seek(0, 0)
	if size < 8:
	raise Exception('File %s is short (< 8 bytes)' % path)
	bits = ReadMagicAndReturnBitness(f, path)
	size -= 8
	s = array.array(TypeCodeForBits(bits), f.read(size))
	print >>sys.stderr, "%s: read %d %d-bit PCs from %s" % (prog_name, size * 8 / bits, bits, path)
	return s

	def Merge(files):
	s = set()
	for f in files:
	s = s.union(set(ReadOneFile(f)))
	print >> sys.stderr, "%s: %d files merged; %d PCs total" % \
	(prog_name, len(files), len(s))
	return sorted(s)

	def PrintFiles(files):
	if len(files) > 1:
	s = Merge(files)
	else: # If there is just on file, print the PCs in order.
	s = ReadOneFile(files[0])
	print >> sys.stderr, "%s: 1 file merged; %d PCs total" % \
	(prog_name, len(s))
	for i in s:
	print "0x%x" % i

	def MergeAndPrint(files):
	if sys.stdout.isatty():
	Usage()
	s = Merge(files)
	bits = 32
	if max(s) > 0xFFFFFFFF:
	bits = 64
	array.array('I', MagicForBits(bits)).tofile(sys.stdout)
	a = array.array(TypeCodeForBits(bits), s)
	a.tofile(sys.stdout)


	def UnpackOneFile(path):
	with open(path, mode="rb") as f:
	print >> sys.stderr, "%s: unpacking %s" % (prog_name, path)
	while True:
	header = f.read(12)
	if not header: return
	if len(header) < 12:
	break
	pid, module_length, blob_size = struct.unpack('iII', header)
	module = f.read(module_length)
	blob = f.read(blob_size)
	assert(len(module) == module_length)
	assert(len(blob) == blob_size)
	extracted_file = "%s.%d.sancov" % (module, pid)
	print >> sys.stderr, "%s: extracting %s" % \
	(prog_name, extracted_file)
	# The packed file may contain multiple blobs for the same pid/module
	# pair. Append to the end of the file instead of overwriting.
	with open(extracted_file, 'ab') as f2:
	f2.write(blob)
	# fail
	raise Exception('Error reading file %s' % path)


	def Unpack(files):
	for f in files:
	UnpackOneFile(f)

	def UnpackOneRawFile(path, map_path):
	mem_map = []
	with open(map_path, mode="rt") as f_map:
	print >> sys.stderr, "%s: reading map %s" % (prog_name, map_path)
	bits = int(f_map.readline())
	if bits != 32 and bits != 64:
	raise Exception('Wrong bits size in the map')
	for line in f_map:
	parts = line.rstrip().split()
	mem_map.append((int(parts[0], 16),
	int(parts[1], 16),
	int(parts[2], 16),
	' '.join(parts[3:])))
	mem_map.sort(key=lambda m : m[0])
	mem_map_keys = [m[0] for m in mem_map]

	with open(path, mode="rb") as f:
	print >> sys.stderr, "%s: unpacking %s" % (prog_name, path)

	f.seek(0, 2)
	size = f.tell()
	f.seek(0, 0)
	pcs = array.array(TypeCodeForBits(bits), f.read(size))
	mem_map_pcs = [[] for i in range(0, len(mem_map))]

	for pc in pcs:
	if pc == 0: continue
	map_idx = bisect.bisect(mem_map_keys, pc) - 1
	(start, end, base, module_path) = mem_map[map_idx]
	assert pc >= start
	if pc >= end:
	print >> sys.stderr, "warning: %s: pc %x outside of any known mapping" % (prog_name, pc)
	continue
	mem_map_pcs[map_idx].append(pc - base)

	for ((start, end, base, module_path), pc_list) in zip(mem_map, mem_map_pcs):
	if len(pc_list) == 0: continue
	assert path.endswith('.sancov.raw')
	dst_path = module_path + '.' + os.path.basename(path)[:-4]
	print >> sys.stderr, "%s: writing %d PCs to %s" % (prog_name, len(pc_list), dst_path)
	arr = array.array(TypeCodeForBits(bits))
	arr.fromlist(sorted(pc_list))
	with open(dst_path, 'ab') as f2:
	array.array('I', MagicForBits(bits)).tofile(f2)
	arr.tofile(f2)

	def RawUnpack(files):
	for f in files:
	if not f.endswith('.sancov.raw'):
	raise Exception('Unexpected raw file name %s' % f)
	f_map = f[:-3] + 'map'
	UnpackOneRawFile(f, f_map)

	def GetInstrumentedPCs(binary):
	# This looks scary, but all it does is extract all offsets where we call:
	# - __sanitizer_cov() or __sanitizer_cov_with_check(),
	# - with call or callq,
	# - directly or via PLT.
	cmd = "objdump -d %s \| " \
	"grep '^\s\+[0-9a-f]\+:.*\scall\(q\\|\)\s\+[0-9a-f]\+ <__sanitizer_cov\(_with_check\\|\)\(@plt\\|\)>' \| " \
	"grep '^\s\+[0-9a-f]\+' -o" % binary
	proc = subprocess.Popen(cmd, stdin=subprocess.PIPE, stdout=subprocess.PIPE,
	shell=True)
	proc.stdin.close()
	# The PCs we get from objdump are off by 4 bytes, as they point to the
	# beginning of the callq instruction. Empirically this is true on x86 and
	# x86_64.
	return set(int(line.strip(), 16) + 4 for line in proc.stdout)

	def PrintMissing(binary):
	if not os.path.isfile(binary):
	raise Exception('File not found: %s' % binary)
	instrumented = GetInstrumentedPCs(binary)
	print >> sys.stderr, "%s: found %d instrumented PCs in %s" % (prog_name,
	len(instrumented),
	binary)
	covered = set(int(line, 16) for line in sys.stdin)
	print >> sys.stderr, "%s: read %d PCs from stdin" % (prog_name, len(covered))
	missing = instrumented - covered
	print >> sys.stderr, "%s: %d PCs missing from coverage" % (prog_name, len(missing))
	if (len(missing) > len(instrumented) - len(covered)):
	print >> sys.stderr, \
	"%s: WARNING: stdin contains PCs not found in binary" % prog_name
	for pc in sorted(missing):
	print "0x%x" % pc

	if __name__ == '__main__':
	prog_name = sys.argv[0]
	if len(sys.argv) <= 2:
	Usage();

	if sys.argv[1] == "missing":
	if len(sys.argv) != 3:
	Usage()
	PrintMissing(sys.argv[2])
	exit(0)

	file_list = []
	for f in sys.argv[2:]:
	file_list += glob.glob(f)
	if not file_list:
	Usage()

	if sys.argv[1] == "print":
	PrintFiles(file_list)
	elif sys.argv[1] == "merge":
	MergeAndPrint(file_list)
	elif sys.argv[1] == "unpack":
	Unpack(file_list)
	elif sys.argv[1] == "rawunpack":
	RawUnpack(file_list)
	else:
	Usage()