Add coverage

tools/telemetry/third_party/coverage/lab/show_pyc.py

+# Licensed under the Apache License: http://www.apache.org/licenses/LICENSE-2.0
+# For details: https://bitbucket.org/ned/coveragepy/src/default/NOTICE.txt
+
+import dis, marshal, struct, sys, time, types
+
+def show_pyc_file(fname):
+    f = open(fname, "rb")
+    magic = f.read(4)
+    moddate = f.read(4)
+    modtime = time.asctime(time.localtime(struct.unpack('<L', moddate)[0]))
+    print "magic %s" % (magic.encode('hex'))
+    print "moddate %s (%s)" % (moddate.encode('hex'), modtime)
+    code = marshal.load(f)
+    show_code(code)
+
+def show_py_file(fname):
+    text = open(fname).read().replace('\r\n', '\n')
+    show_py_text(text, fname=fname)
+
+def show_py_text(text, fname="<string>"):
+    code = compile(text, fname, "exec")
+    show_code(code)
+
+def show_code(code, indent=''):
+    print "%scode" % indent
+    indent += '   '
+    print "%sargcount %d" % (indent, code.co_argcount)
+    print "%snlocals %d" % (indent, code.co_nlocals)
+    print "%sstacksize %d" % (indent, code.co_stacksize)
+    print "%sflags %04x" % (indent, code.co_flags)
+    show_hex("code", code.co_code, indent=indent)
+    dis.disassemble(code)
+    print "%sconsts" % indent
+    for const in code.co_consts:
+        if type(const) == types.CodeType:
+            show_code(const, indent+'   ')
+        else:
+            print "   %s%r" % (indent, const)
+    print "%snames %r" % (indent, code.co_names)
+    print "%svarnames %r" % (indent, code.co_varnames)
+    print "%sfreevars %r" % (indent, code.co_freevars)
+    print "%scellvars %r" % (indent, code.co_cellvars)
+    print "%sfilename %r" % (indent, code.co_filename)
+    print "%sname %r" % (indent, code.co_name)
+    print "%sfirstlineno %d" % (indent, code.co_firstlineno)
+    show_hex("lnotab", code.co_lnotab, indent=indent)
+
+def show_hex(label, h, indent):
+    h = h.encode('hex')
+    if len(h) < 60:
+        print "%s%s %s" % (indent, label, h)
+    else:
+        print "%s%s" % (indent, label)
+        for i in range(0, len(h), 60):
+            print "%s   %s" % (indent, h[i:i+60])
+
+def show_file(fname):
+    if fname.endswith('pyc'):
+        show_pyc_file(fname)
+    elif fname.endswith('py'):
+        show_py_file(fname)
+    else:
+        print "Odd file:", fname
+
+def main(args):
+    if args[0] == '-c':
+        show_py_text(" ".join(args[1:]).replace(";", "\n"))
+    else:
+        for a in args:
+            show_file(a)
+
+if __name__ == '__main__':
+    main(sys.argv[1:])