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
|
#!/usr/bin/python
#
# Copyright (c) 2011 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Generator for Pnacl Shim functions that bridges the calling conventions
between GCC and PNaCl. """
from datetime import datetime
import difflib
import glob
import os
import sys
from idl_c_proto import CGen
from idl_gen_wrapper import Interface, WrapperGen
from idl_log import ErrOut, InfoOut, WarnOut
from idl_option import GetOption, Option, ParseOptions
from idl_parser import ParseFiles
Option('pnaclshim', 'Name of the pnacl shim file.',
default='temp_pnacl_shim.c')
Option('disable_pnacl_opt', 'Turn off optimization of pnacl shim.')
class PnaclGen(WrapperGen):
"""PnaclGen generates shim code to bridge the Gcc ABI with PNaCl.
This subclass of WrapperGenerator takes the IDL sources and
generates shim methods for bridging the calling conventions between GCC
and PNaCl (LLVM). Some of the PPAPI methods do not need shimming, so
this will also detect those situations and provide direct access to the
original PPAPI methods (rather than the shim methods).
"""
def __init__(self):
WrapperGen.__init__(self,
'Pnacl',
'Pnacl Shim Gen',
'pnacl',
'Generate the PNaCl shim.')
self.cgen = CGen()
self._skip_opt = False
self._pnacl_attribute = '__attribute__((pnaclcall))'
############################################################
def OwnHeaderFile(self):
"""Return the header file that specifies the API of this wrapper.
We do not generate the header files. """
return 'ppapi/generators/pnacl_shim.h'
def InterfaceNeedsWrapper(self, iface, releases):
"""Return true if the interface has ANY methods that need wrapping.
"""
if self._skip_opt:
return True
for release in iface.GetUniqueReleases(releases):
version = iface.GetVersion(release)
if self.InterfaceVersionNeedsWrapping(iface, version):
return True
return False
def InterfaceVersionNeedsWrapping(self, iface, version):
"""Return true if the interface+version has ANY methods that
need wrapping.
"""
if self._skip_opt:
return True
for member in iface.GetListOf('Member'):
release = member.GetRelease(version)
if self.MemberNeedsWrapping(member, release):
return True
return False
def MemberNeedsWrapping(self, member, release):
"""Return true if a particular member function at a particular
release needs wrapping.
"""
if self._skip_opt:
return True
if not member.InReleases([release]):
return False
ret, name, array, args_spec = self.cgen.GetComponents(member,
release,
'store')
return self.TypeNeedsWrapping(ret, []) or self.ArgsNeedWrapping(args_spec)
def ArgsNeedWrapping(self, args):
"""Return true if any parameter in the list needs wrapping.
"""
for arg in args:
(type_str, name, array_dims, more_args) = arg
if self.TypeNeedsWrapping(type_str, array_dims):
return True
return False
def TypeNeedsWrapping(self, type_node, array_dims):
"""Return true if a parameter type needs wrapping.
Currently, this is true for byval aggregates.
"""
is_aggregate = type_node.startswith('struct') or \
type_node.startswith('union')
is_reference = (type_node.find('*') != -1 or array_dims != [])
return is_aggregate and not is_reference
############################################################
def GenerateWrapperForPPBMethod(self, iface, member):
result = []
func_prefix = self.WrapperMethodPrefix(iface.node, iface.release)
sig = self.cgen.GetSignature(member, iface.release, 'store',
func_prefix, False)
result.append('static %s\n%s {\n' % (self._pnacl_attribute, sig))
result.append(' const struct %s *iface = %s.real_iface;\n' %
(iface.struct_name, self.GetWrapperInfoName(iface)))
ret, name, array, cspec = self.cgen.GetComponents(member,
iface.release,
'store')
ret_str, args_str = self.GetReturnArgs(ret, cspec)
result.append(' %siface->%s(%s);\n}\n\n' % (ret_str,
member.GetName(), args_str))
return result
def GenerateWrapperForPPPMethod(self, iface, member):
result = []
func_prefix = self.WrapperMethodPrefix(iface.node, iface.release)
sig = self.cgen.GetSignature(member, iface.release, 'store',
func_prefix, False)
result.append('static %s {\n' % sig)
result.append(' const struct %s *iface = %s.real_iface;\n' %
(iface.struct_name, self.GetWrapperInfoName(iface)))
temp_fp = self.cgen.GetSignature(member, iface.release, 'return',
'temp_fp',
func_as_ptr=True,
ptr_prefix=self._pnacl_attribute + ' ',
include_name=False)
cast = self.cgen.GetSignature(member, iface.release, 'return',
prefix='',
func_as_ptr=True,
ptr_prefix=self._pnacl_attribute + ' ',
include_name=False)
result.append(' %s = ((%s)iface->%s);\n' % (temp_fp,
cast,
member.GetName()))
ret, name, array, cspec = self.cgen.GetComponents(member,
iface.release,
'store')
ret_str, args_str = self.GetReturnArgs(ret, cspec)
result.append(' %stemp_fp(%s);\n}\n\n' % (ret_str, args_str))
return result
def GenerateRange(self, ast, releases, options):
"""Generate shim code for a range of releases.
"""
self._skip_opt = GetOption('disable_pnacl_opt')
self.SetOutputFile(GetOption('pnaclshim'))
return WrapperGen.GenerateRange(self, ast, releases, options)
pnaclgen = PnaclGen()
######################################################################
# Tests.
# Clean a string representing an object definition and return then string
# as a single space delimited set of tokens.
def CleanString(instr):
instr = instr.strip()
instr = instr.split()
return ' '.join(instr)
def PrintErrorDiff(old, new):
oldlines = old.split(';')
newlines = new.split(';')
d = difflib.Differ()
diff = d.compare(oldlines, newlines)
ErrOut.Log('Diff is:\n%s' % '\n'.join(diff))
def GetOldTestOutput(ast):
# Scan the top-level comments in the IDL file for comparison.
old = []
for filenode in ast.GetListOf('File'):
for node in filenode.GetChildren():
instr = node.GetOneOf('Comment')
if not instr: continue
instr.Dump()
old.append(instr.GetName())
return CleanString(''.join(old))
def TestFiles(filenames, test_releases):
ast = ParseFiles(filenames)
iface_releases = pnaclgen.DetermineInterfaces(ast, test_releases)
new_output = CleanString(pnaclgen.GenerateWrapperForMethods(
iface_releases, comments=False))
old_output = GetOldTestOutput(ast)
if new_output != old_output:
PrintErrorDiff(old_output, new_output)
ErrOut.Log('Failed pnacl generator test.')
return 1
else:
InfoOut.Log('Passed pnacl generator test.')
return 0
def Main(args):
filenames = ParseOptions(args)
test_releases = ['M13', 'M14', 'M15']
if not filenames:
idldir = os.path.split(sys.argv[0])[0]
idldir = os.path.join(idldir, 'test_gen_pnacl', '*.idl')
filenames = glob.glob(idldir)
filenames = sorted(filenames)
if GetOption('test'):
# Run the tests.
return TestFiles(filenames, test_releases)
# Otherwise, generate the output file (for potential use as golden file).
ast = ParseFiles(filenames)
return pnaclgen.GenerateRange(ast, test_releases, filenames)
if __name__ == '__main__':
retval = Main(sys.argv[1:])
sys.exit(retval)
|
