diff options
Diffstat (limited to 'lib/sanitizer_common/scripts')
-rwxr-xr-x | lib/sanitizer_common/scripts/sancov.py | 47 |
1 files changed, 40 insertions, 7 deletions
diff --git a/lib/sanitizer_common/scripts/sancov.py b/lib/sanitizer_common/scripts/sancov.py index aa791bc4e..4354359b0 100755 --- a/lib/sanitizer_common/scripts/sancov.py +++ b/lib/sanitizer_common/scripts/sancov.py @@ -4,6 +4,7 @@ # 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 prog_name = ""; @@ -11,16 +12,16 @@ prog_name = ""; def Usage(): print >> sys.stderr, "Usage: \n" + \ " " + prog_name + " merge file1 [file2 ...] > output\n" \ - " " + prog_name + " print file1 [file2 ...]\n" + " " + prog_name + " print file1 [file2 ...]\n" \ + " " + prog_name + " unpack file1 [file2 ...]\n" exit(1) def ReadOneFile(path): - f = open(path, mode="rb") - f.seek(0, 2) - size = f.tell() - f.seek(0, 0) - s = set(array.array('I', f.read(size))) - f.close() + 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 @@ -44,6 +45,36 @@ def MergeAndPrint(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) + + if __name__ == '__main__': prog_name = sys.argv[0] if len(sys.argv) <= 2: @@ -52,5 +83,7 @@ if __name__ == '__main__': PrintFiles(sys.argv[2:]) elif sys.argv[1] == "merge": MergeAndPrint(sys.argv[2:]) + elif sys.argv[1] == "unpack": + Unpack(sys.argv[2:]) else: Usage() |