d.py (2649B)
1 # -*- coding: utf-8 -*- 2 3 """ 4 trace/generated-tracers.dtrace (DTrace only). 5 """ 6 7 __author__ = "Lluís Vilanova <vilanova@ac.upc.edu>" 8 __copyright__ = "Copyright 2012-2014, Lluís Vilanova <vilanova@ac.upc.edu>" 9 __license__ = "GPL version 2 or (at your option) any later version" 10 11 __maintainer__ = "Stefan Hajnoczi" 12 __email__ = "stefanha@redhat.com" 13 14 15 from tracetool import out 16 from sys import platform 17 18 19 # Reserved keywords from 20 # https://wikis.oracle.com/display/DTrace/Types,+Operators+and+Expressions 21 RESERVED_WORDS = ( 22 'auto', 'goto', 'sizeof', 'break', 'if', 'static', 'case', 'import', 23 'string', 'char', 'inline', 'stringof', 'const', 'int', 'struct', 24 'continue', 'long', 'switch', 'counter', 'offsetof', 'this', 25 'default', 'probe', 'translator', 'do', 'provider', 'typedef', 26 'double', 'register', 'union', 'else', 'restrict', 'unsigned', 27 'enum', 'return', 'void', 'extern', 'self', 'volatile', 'float', 28 'short', 'while', 'for', 'signed', 'xlate', 29 ) 30 31 32 def generate(events, backend, group): 33 events = [e for e in events 34 if "disable" not in e.properties] 35 36 # SystemTap's dtrace(1) warns about empty "provider qemu {}" but is happy 37 # with an empty file. Avoid the warning. 38 # But dtrace on macOS can't deal with empty files. 39 if not events and platform != "darwin": 40 return 41 42 out('/* This file is autogenerated by tracetool, do not edit. */' 43 '', 44 'provider qemu {') 45 46 for e in events: 47 args = [] 48 for type_, name in e.args: 49 if platform == "darwin": 50 # macOS dtrace accepts only C99 _Bool 51 if type_ == 'bool': 52 type_ = '_Bool' 53 if type_ == 'bool *': 54 type_ = '_Bool *' 55 # It converts int8_t * in probe points to char * in header 56 # files and introduces [-Wpointer-sign] warning. 57 # Avoid it by changing probe type to signed char * beforehand. 58 if type_ == 'int8_t *': 59 type_ = 'signed char *' 60 61 # SystemTap dtrace(1) emits a warning when long long is used 62 type_ = type_.replace('unsigned long long', 'uint64_t') 63 type_ = type_.replace('signed long long', 'int64_t') 64 type_ = type_.replace('long long', 'int64_t') 65 66 if name in RESERVED_WORDS: 67 name += '_' 68 args.append(type_ + ' ' + name) 69 70 # Define prototype for probe arguments 71 out('', 72 'probe %(name)s(%(args)s);', 73 name=e.name, 74 args=','.join(args)) 75 76 out('', 77 '};')