diff options
Diffstat (limited to 'contrib/compiler-rt/lib/sanitizer_common/scripts/sancov.py')
-rwxr-xr-x | contrib/compiler-rt/lib/sanitizer_common/scripts/sancov.py | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/contrib/compiler-rt/lib/sanitizer_common/scripts/sancov.py b/contrib/compiler-rt/lib/sanitizer_common/scripts/sancov.py new file mode 100755 index 000000000000..566116eb2334 --- /dev/null +++ b/contrib/compiler-rt/lib/sanitizer_common/scripts/sancov.py @@ -0,0 +1,147 @@ +#!/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() |