1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
|
#!/usr/bin/python
# This handles the systemtap equivalent of
# $(DTRACE) $(DTRACEFLAGS) -G -s $^ -o $@
# $(DTRACE) $(DTRACEFLAGS) -h -s $^ -o $@
# which is a step that builds DTrace provider and probe definitions
# Copyright (C) 2009 Red Hat Inc.
#
# This file is part of systemtap, and is free software. You can
# redistribute it and/or modify it under the terms of the GNU General
# Public License (GPL); either version 2, or (at your option) any
# later version.
import os,posix,string,sys
from subprocess import call
from tempfile import mkstemp
class provider:
semaphores_def = "\n"
# is the type a basic scalar type?
def basic_type(self, arg):
basic_types = [ "int","int*","long","long*","short","short int","unsigned long","char","char*","float","double" ]
split_arg = arg.rsplit(None,1)
return (split_arg[0].strip() in basic_types) & (arg.find("[") == -1)
def typedef_append(self, typedefs,this_probe,arg,c):
if (add_typedefs):
split_arg = arg.rsplit(None,1)
if (self.basic_type(arg)):
return typedefs
type_name = " %s_arg%d" % (this_probe.replace("__","_"),c)
if (len(split_arg) > 1):
typedefs += ("typedef " + arg.replace(" " + split_arg[1].split("[")[0].lstrip("*"),type_name).strip() + "; ")
typedefs += (type_name + type_name + "_v;\n")
else:
typedefs += ("typedef " + arg.strip() + type_name + "; ")
typedefs += (type_name + type_name + "_v;\n")
return typedefs
def semaphore_def_append(self, this_probe):
# NB: unsigned short is fixed in ABI
self.semaphores_def += "__extension__ unsigned short %s_semaphore __attribute__ ((unused)) __attribute__ ((section (\".probes\")));\n" % (this_probe)
def semaphore_def_write(self, file):
file.write(self.semaphores_def)
def generate(self, provider, header, add_typedefs):
have_provider = False
self.f = open(provider)
self.h = open(header,mode='w')
self.h.write("/* Generated by the Systemtap dtrace wrapper */\n")
self.h.write("\n#define STAP_HAS_SEMAPHORES 1\n\n")
self.h.write("\n#include <sys/sdt.h>\n\n")
in_comment = False
typedefs = ""
while (True):
line = self.f.readline()
if (line == ""):
break
if (line.find("/*") != -1):
in_comment = True
if (line.find("*/") != -1):
in_comment = False
continue
if (in_comment):
continue
if (line.find("provider") != -1):
tokens = line.split()
have_provider = True
self.provider = tokens[1]
elif (not have_provider):
if (add_typedefs):
self.h.write (line)
elif (have_provider and line.find("probe ") != -1):
while (line.find(")") < 0):
line += self.f.readline()
this_probe = line[line.find("probe ")+5:line.find("(")].strip()
this_probe_canon = self.provider.upper() + "_" + this_probe.replace("__","_").upper()
args = (line[line.find("(")+1:line.find(")")])
args_string = ""
arg = ""
i = 0
c = 0
self.semaphore_def_append (this_probe)
while (i < len(args)):
if (args[i:i+1] == ","):
args_string = ('%s %s,' % (args_string, arg.strip()))
c += 1
typedefs = self.typedef_append (typedefs,this_probe,arg,c)
arg = ""
else:
arg = arg + args[i]
i += 1
if (i != 0):
args_string = ('%s %s' % (args_string, arg.strip()))
if (len(args_string) == 0):
c = 0
stap_str = "STAP_PROBE(provider,%s" % (this_probe)
else:
c += 1
typedefs = self.typedef_append (typedefs,this_probe,arg,c)
stap_str = "STAP_PROBE%d(provider,%s" % (c,this_probe)
define_str = "#define %s(" % (this_probe_canon)
i = 1
while (i <= c):
if (i != 1):
define_str += ","
define_str = define_str + "arg%s" % (i);
stap_str = stap_str + ",arg%s" % (i);
i += 1
self.h.write ('/* %s (%s) */\n' % (this_probe_canon,args_string))
# XXX Enable this when .so semaphores work properly
self.h.write ('#define %s_ENABLED() %s_semaphore\n' % (this_probe_canon,this_probe))
# NB: unsigned short is fixed in ABI
self.h.write ("__extension__ extern unsigned short %s_semaphore __attribute__ ((unused)) __attribute__ ((section (\".probes\")));\n" % (this_probe))
self.h.write (define_str + ") \\\n")
self.h.write (stap_str + ")\n\n")
elif (line.find("}") != -1 and have_provider):
have_provider = False
if (add_typedefs):
self.h.write (typedefs)
self.h.close()
def usage ():
print "Usage " + sys.argv[0] + " [--help] [-h | -G] [-C [-I<Path>]] -s File.d [-o <File>]"
def help ():
usage()
print "Where -h builds a systemtap header file from the .d file"
print " -C when used with -h, also run cpp preprocessor"
print " -o specifies an explicit output file name,"
print " the default for -G is file.o and -h is file.h"
print " -I when running cpp pass through this -I include Path"
print " -s specifies the name of the .d input file"
print " -G builds a stub file.o from file.d,"
print " which is required by some packages that use dtrace."
sys.exit(1)
def open_file (arg):
if (len (sys.argv) <= arg):
return False
try:
file = open(sys.argv[arg], 'r')
except IOError:
print (sys.argv[arg] + " not found")
sys.exit(1)
return file
########################################################################
# main
########################################################################
if (len (sys.argv) < 2):
usage()
sys.exit(1)
i = 1
build_header = False
build_source = False
add_typedefs = False
keep_temps = False
use_cpp = False
h_ext = '.h'
filename = ""
s_filename = ""
includes = []
while (i < len (sys.argv)):
if (sys.argv[i] == "-o"):
i += 1
filename = sys.argv[i]
elif (sys.argv[i] == "-s"):
i += 1
s_filename = sys.argv[i]
elif (sys.argv[i] == "-C"):
use_cpp = True
elif (sys.argv[i] == "-h"):
build_header = True
elif (sys.argv[i].startswith("-I")):
includes.append(sys.argv[i])
elif (sys.argv[i] == "-G"):
build_source = True
elif (sys.argv[i] == "-k"):
keep_temps = True
elif (sys.argv[i] == "--types"):
add_typedefs = True
elif (sys.argv[i] == "--help"):
help()
i += 1
if (build_header == False and build_source == False):
usage()
sys.exit(1)
if (s_filename != "" and use_cpp):
(d,fn) = mkstemp(suffix=".d")
args = ['cpp'] + includes + [s_filename, fn]
retcode = call(args)
if (retcode != 0):
print "\"cpp includes s_filename\" failed"
usage()
sys.exit(1)
s_filename = fn
if (filename == ""):
if (s_filename != ""):
(filename,ext) = os.path.splitext(s_filename)
filename = os.path.basename(filename)
else:
usage
sys.exit(1)
else:
if (build_header):
h_ext = ""
else:
(filename,ext) = os.path.splitext(filename)
if (build_header):
providers = provider()
providers.generate(s_filename, filename + h_ext, add_typedefs)
elif (build_source):
(basename,ext) = os.path.splitext(s_filename)
# create for semaphore_def_write
providers = provider()
(d,fn) = mkstemp(suffix=".h")
providers.generate(s_filename, fn, add_typedefs)
if (not keep_temps):
os.remove(fn)
else:
print "header: " + fn
(d,fn) = mkstemp(suffix=".c")
f = open(fn,mode='w')
f.write("static __dtrace () {}\n")
providers.semaphore_def_write(f)
f.close()
call(["gcc", "-fPIC", "-I.", "-I@prefix@/include", "-g", "-c", fn, "-o", filename + ".o"], shell=False)
if (not keep_temps):
os.remove(fn)
else:
print "source: " + fn
if (use_cpp):
if (not keep_temps):
os.remove(s_filename)
else:
print "cpp: " + s_filename
|
