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#!/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 struct
import sys
import bisect
import os.path
prog_name = "";
def Usage():
print >> sys.stderr, "Usage: \n" + \
" " + prog_name + " merge file1 [file2 ...] > output\n" \
" " + prog_name + " print file1 [file2 ...]\n" \
" " + prog_name + " unpack file1 [file2 ...]\n" \
" " + prog_name + " rawunpack file1 [file2 ...]\n"
exit(1)
def ReadOneFile(path):
with open(path, mode="rb") as f:
f.seek(0, 2)
size = f.tell()
f.seek(0, 0)
s = set(array.array('I', f.read(size)))
print >>sys.stderr, "%s: read %d PCs from %s" % (prog_name, size / 4, path)
return s
def Merge(files):
s = set()
for f in files:
s = s.union(ReadOneFile(f))
print >> sys.stderr, "%s: %d files merged; %d PCs total" % \
(prog_name, len(files), len(s))
return sorted(s)
def PrintFiles(files):
s = Merge(files)
for i in s:
print "0x%x" % i
def MergeAndPrint(files):
if sys.stdout.isatty():
Usage()
s = Merge(files)
a = array.array('I', 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())
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)
if bits == 64:
typecode = 'L'
else:
typecode = 'I'
pcs = array.array(typecode, 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('I')
arr.fromlist(sorted(pc_list))
with open(dst_path, 'ab') as 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)
if __name__ == '__main__':
prog_name = sys.argv[0]
if len(sys.argv) <= 2:
Usage();
if sys.argv[1] == "print":
PrintFiles(sys.argv[2:])
elif sys.argv[1] == "merge":
MergeAndPrint(sys.argv[2:])
elif sys.argv[1] == "unpack":
Unpack(sys.argv[2:])
elif sys.argv[1] == "rawunpack":
RawUnpack(sys.argv[2:])
else:
Usage()
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