summaryrefslogtreecommitdiff
path: root/compilerplugins/clang/unusedmethods.py
blob: fc3b1ab518dc656c11c0947a8d2afa32b27b31fc (plain)
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
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
#!/usr/bin/python

import sys
import re
import io

# --------------------------------------------------------------------------------------------
# globals
# --------------------------------------------------------------------------------------------

definitionSet = set() # set of tuple(return_type, name_and_params)
definitionToSourceLocationMap = dict()

# for the "unused methods" analysis
callSet = set() # set of tuple(return_type, name_and_params)

# for the "method can be private" analysis
publicDefinitionSet = set() # set of tuple(return_type, name_and_params)
calledFromOutsideSet = set() # set of tuple(return_type, name_and_params)
virtualSet = set() # set of tuple(return_type, name_and_params)

# for the "unused return types" analysis
usedReturnSet = set() # set of tuple(return_type, name_and_params)


# things we need to exclude for reasons like :
# - it's a weird template thingy that confuses the plugin
unusedMethodsExclusionSet = set([
    # only used by Windows build
    "_Bool basegfx::B2ITuple::equalZero() const",
    "const class basegfx::B2DPolyPolygon & basegfx::unotools::UnoPolyPolygon::getPolyPolygonUnsafe() const",
    "void basegfx::B2IRange::expand(const class basegfx::B2IRange &)",
    "void OpenGLContext::requestSingleBufferedRendering()",
	"_Bool TabitemValue::isBothAligned() const",
	"_Bool TabitemValue::isNotAligned() const",
	"void TabitemValue::isLast() const",
	"void StyleSettings::SetSpinSize(long)",
	"void StyleSettings::SetFloatTitleHeight(long)",
    "void StyleSettings::SetTitleHeight(long)",
    "void StyleSettings::SetUseFlatBorders(_Bool)",
    "void StyleSettings::SetUseFlatMenus(_Bool)",
    "void StyleSettings::SetCursorSize(long)",
    "_Bool CommandMediaData::GetPassThroughToOS() const",
    "void Application::AppEvent(const class ApplicationEvent &)",
    "int PhysicalFontFace::GetWidth() const",
    "void PhysicalFontFace::SetBitmapSize(int,int)",
    "class boost::intrusive_ptr<class FontCharMap> FontCharMap::GetDefaultMap(_Bool)",
    "_Bool SalObject::IsEraseBackgroundEnabled()",
    "const class rtl::OUString & connectivity::OColumn::getCatalogName() const",
    "const class rtl::OUString & connectivity::OColumn::getSchemaName() const",
    "_Bool connectivity::OColumn::isDefinitelyWritable() const",
    "_Bool connectivity::OColumn::isReadOnly() const",
    "_Bool connectivity::OColumn::isWritable() const",
    "_Bool IDocumentLinksAdministration::GetData(const class rtl::OUString &,const class rtl::OUString &,class com::sun::star::uno::Any &) const",
    "_Bool IDocumentLinksAdministration::SetData(const class rtl::OUString &,const class rtl::OUString &,const class com::sun::star::uno::Any &)",
    "_Bool ScImportExport::ImportData(const class rtl::OUString &,const class com::sun::star::uno::Any &)",
	"void* ScannerManager::GetData()",
	"void ScannerManager::SetData(void *)",
    "class rtl::OUString FilterConfigCache::GetImportFormatMediaType(unsigned short)",
    # only used by OSX build
    "void StyleSettings::SetHideDisabledMenuItems(_Bool)",
    "_Bool TabitemValue::isLast() const",
    "ApplicationEvent::ApplicationEvent(enum ApplicationEvent::Type,const class std::__debug::vector<class rtl::OUString, class std::allocator<class rtl::OUString> > &)",
    # debugging methods
    "void oox::drawingml::TextParagraphProperties::dump() const",
    "void oox::PropertyMap::dumpCode(class com::sun::star::uno::Reference<class com::sun::star::beans::XPropertySet>)",
    "void oox::PropertyMap::dumpData(class com::sun::star::uno::Reference<class com::sun::star::beans::XPropertySet>)",
    "class std::basic_string<char, struct std::char_traits<char>, class std::allocator<char> > writerfilter::ooxml::OOXMLPropertySet::toString()",
    # I need to teach the plugin that for loops with range expressions call begin() and end()
    "class __gnu_debug::_Safe_iterator<class __gnu_cxx::__normal_iterator<class SwAnchoredObject *const *, class std::__cxx1998::vector<class SwAnchoredObject *, class std::allocator<class SwAnchoredObject *> > >, class std::__debug::vector<class SwAnchoredObject *, class std::allocator<class SwAnchoredObject *> > > SwSortedObjs::begin() const",
    "class __gnu_debug::_Safe_iterator<class __gnu_cxx::__normal_iterator<class SwAnchoredObject *const *, class std::__cxx1998::vector<class SwAnchoredObject *, class std::allocator<class SwAnchoredObject *> > >, class std::__debug::vector<class SwAnchoredObject *, class std::allocator<class SwAnchoredObject *> > > SwSortedObjs::end() const",
    # loaded by dlopen()
    "void * getStandardAccessibleFactory()",
    "void * getSvtAccessibilityComponentFactory()",
    "struct _rtl_uString * basicide_choose_macro(void *,void *,unsigned char,struct _rtl_uString *)",
    "void basicide_macro_organizer(short)",
    "long basicide_handle_basic_error(void *)",
    "class com::sun::star::uno::XInterface * org_libreoffice_chart2_Chart2ToolboxController(class com::sun::star::uno::XComponentContext *,const class com::sun::star::uno::Sequence<class com::sun::star::uno::Any> &)",
    "class com::sun::star::uno::XInterface * org_libreoffice_comp_chart2_sidebar_ChartPanelFactory(class com::sun::star::uno::XComponentContext *,const class com::sun::star::uno::Sequence<class com::sun::star::uno::Any> &)",
    "class chart::opengl::OpenglShapeFactory * getOpenglShapeFactory()",
    "class VclAbstractDialogFactory * CreateDialogFactory()",
    "_Bool GetSpecialCharsForEdit(class vcl::Window *,const class vcl::Font &,class rtl::OUString &)",
    "const struct ImplTextEncodingData * sal_getFullTextEncodingData(unsigned short)",
    "class SalInstance * create_SalInstance()",
    "class SwAbstractDialogFactory * SwCreateDialogFactory()",
    "class com::sun::star::uno::Reference<class com::sun::star::uno::XInterface> WordPerfectImportFilterDialog_createInstance(const class com::sun::star::uno::Reference<class com::sun::star::uno::XComponentContext> &)",
    "class UnoWrapperBase * CreateUnoWrapper()",
    "class SwAbstractDialogFactory * SwCreateDialogFactory()",
    "unsigned long GetSaveWarningOfMSVBAStorage_ww8(class SfxObjectShell &)",
    "unsigned long SaveOrDelMSVBAStorage_ww8(class SfxObjectShell &,class SotStorage &,unsigned char,const class rtl::OUString &)",
    "void ExportRTF(const class rtl::OUString &,const class rtl::OUString &,class tools::SvRef<class Writer> &)",
    "void ExportDOC(const class rtl::OUString &,const class rtl::OUString &,class tools::SvRef<class Writer> &)",
    "class Reader * ImportRTF()",
    "void ImportXE(class SwDoc &,class SwPaM &,const class rtl::OUString &)",
    "_Bool TestImportDOC(const class rtl::OUString &,const class rtl::OUString &)",
    "class vcl::Window * CreateWindow(class VCLXWindow **,const struct com::sun::star::awt::WindowDescriptor *,class vcl::Window *,long)",
    # only used when the ODBC driver is enabled
    "_Bool getImplementation(type-parameter-?-? *&,const class com::sun::star::uno::Reference<class com::sun::star::uno::XInterface> &)",
    # called from extensions
    "unsigned short MenuBar::AddMenuBarButton(const class Image &,const class Link<struct MenuBar::MenuBarButtonCallbackArg &, _Bool> &,const class rtl::OUString &)",
    "void MenuBar::SetMenuBarButtonHighlightHdl(unsigned short,const class Link<struct MenuBar::MenuBarButtonCallbackArg &, _Bool> &)",
    "class Rectangle MenuBar::GetMenuBarButtonRectPixel(unsigned short)",
    "void MenuBar::RemoveMenuBarButton(unsigned short)",
    ])

# clang does not always use exactly the same numbers in the type-parameter vars it generates
# so I need to substitute them to ensure we can match correctly.
normalizeTypeParamsRegex = re.compile(r"type-parameter-\d+-\d+")
def normalizeTypeParams( line ):
    return normalizeTypeParamsRegex.sub("type-parameter-?-?", line)

# --------------------------------------------------------------------------------------------
# primary input loop
# --------------------------------------------------------------------------------------------

with io.open("loplugin.unusedmethods.log", "rb", buffering=1024*1024) as txt:
    for line in txt:
        tokens = line.strip().split("\t")
        if tokens[0] == "definition:":
            access = tokens[1]
            returnType = tokens[2]
            nameAndParams = tokens[3]
            sourceLocation = tokens[4]
            virtual = ""
            if len(tokens)>=6: virtual = tokens[5]
            funcInfo = (normalizeTypeParams(returnType), normalizeTypeParams(nameAndParams))
            definitionSet.add(funcInfo)
            if access == "public":
                publicDefinitionSet.add(funcInfo)
            definitionToSourceLocationMap[funcInfo] = sourceLocation
            if virtual == "virtual":
                virtualSet.add(funcInfo)
        elif tokens[0] == "call:":
            returnType = tokens[1]
            nameAndParams = tokens[2]
            callSet.add((normalizeTypeParams(returnType), normalizeTypeParams(nameAndParams)))
        elif tokens[0] == "usedReturn:":
            returnType = tokens[1]
            nameAndParams = tokens[2]
            usedReturnSet.add((normalizeTypeParams(returnType), normalizeTypeParams(nameAndParams)))
        elif tokens[0] == "outside:":
            returnType = tokens[1]
            nameAndParams = tokens[2]
            calledFromOutsideSet.add((normalizeTypeParams(returnType), normalizeTypeParams(nameAndParams)))
        else:
            print( "unknown line: " + line)

# Invert the definitionToSourceLocationMap.
# If we see more than one method at the same sourceLocation, it's being autogenerated as part of a template
# and we should just ignore it.
sourceLocationToDefinitionMap = {}
for k, v in definitionToSourceLocationMap.iteritems():
    sourceLocationToDefinitionMap[v] = sourceLocationToDefinitionMap.get(v, [])
    sourceLocationToDefinitionMap[v].append(k)
for k, definitions in sourceLocationToDefinitionMap.iteritems():
    if len(definitions) > 1:
        for d in definitions:
            definitionSet.remove(d)

def isOtherConstness( d, callSet ):
    method = d[0] + " " + d[1]
    # if this method is const, and there is a non-const variant of it, and the non-const variant is in use, then leave it alone
    if d[0].startswith("const ") and d[1].endswith(" const"):
        if ((d[0][6:],d[1][:-6]) in callSet):
           return True
    elif method.endswith(" const"):
        method2 = method[:len(method)-6] # strip off " const"
        if ((d[0],method2) in callSet):
           return True
    if method.endswith(" const") and ("::iterator" in method):
        method2 = method[:len(method)-6] # strip off " const"
        method2 = method2.replace("::const_iterator", "::iterator")
        if ((d[0],method2) in callSet):
           return True
    # if this method is non-const, and there is a const variant of it, and the const variant is in use, then leave it alone
    if (not method.endswith(" const")) and ((d[0],"const " + method + " const") in callSet):
           return True
    if (not method.endswith(" const")) and ("::iterator" in method):
        method2 = method.replace("::iterator", "::const_iterator") + " const"
        if ((d[0],method2) in callSet):
           return True
    return False

# sort the results using a "natural order" so sequences like [item1,item2,item10] sort nicely
def natural_sort_key(s, _nsre=re.compile('([0-9]+)')):
    return [int(text) if text.isdigit() else text.lower()
            for text in re.split(_nsre, s)]
def sort_set_by_natural_key(s):
    return sorted(s, key=lambda v: natural_sort_key(v[1]))

    
# --------------------------------------------------------------------------------------------
#  "unused methods" analysis
# --------------------------------------------------------------------------------------------

tmp1set = set() # set of tuple(method, source_location)
unusedSet = set() # set of tuple(return_type, name_and_params)
for d in definitionSet:
    method = d[0] + " " + d[1]
    if method in unusedMethodsExclusionSet:
        continue
    if d in callSet:
        continue
    if isOtherConstness(d, callSet):
        continue
    # exclude assignment operators, if we remove them, the compiler creates a default one, which can have odd consequences
    if "::operator=(" in d[1]:
        continue
    # these are only invoked implicitly, so the plugin does not see the calls
    if "::operator new(" in d[1] or "::operator delete(" in d[1]:
        continue
    # just ignore iterators, they normally occur in pairs, and we typically want to leave one constness version alone
    # alone if the other one is in use.
    if d[1] == "begin() const" or d[1] == "begin()" or d[1] == "end()" or d[1] == "end() const":
        continue
    # There is lots of macro magic going on in SRCDIR/include/sax/fshelper.hxx that should be using C++11 varargs templates
    if d[1].startswith("sax_fastparser::FastSerializerHelper::"):
       continue
    # used by Windows build
    if any(x in d[1] for x in ["DdeTopic::", "DdeData::", "DdeService::", "DdeTransaction::", "DdeConnection::", "DdeLink::", "DdeItem::", "DdeGetPutItem::"]):
       continue
    if method == "class tools::SvRef<class FontCharMap> FontCharMap::GetDefaultMap(_Bool)":
       continue
    # too much template magic here for my plugin
    if (   ("cairocanvas::" in d[1])
        or ("canvas::" in d[1])
        or ("oglcanvas::" in d[1])
        or ("vclcanvas::" in d[1])):
       continue
    # these are loaded by dlopen() from somewhere
    if "get_implementation" in d[1]:
       continue
    if "component_getFactory" in d[1]:
       continue
    if d[0]=="_Bool" and "_supportsService(const class rtl::OUString &)" in d[1]:
       continue
    if (d[0]=="class com::sun::star::uno::Reference<class com::sun::star::uno::XInterface>"
        and "Instance(const class com::sun::star::uno::Reference<class com::sun::star::lang::XMultiServiceFactory> &)" in d[1]):
       continue
    # ignore the Java symbols, loaded from the JavaVM
    if d[1].startswith("Java_"):
       continue
    # ignore external code
    if definitionToSourceLocationMap[d].startswith("external/"):
       continue
    # ignore the VCL_BUILDER_DECL_FACTORY stuff
    if d[0]=="void" and d[1].startswith("make") and ("(class VclPtr<class vcl::Window> &" in d[1]):
       continue
    # ignore methods used to dump objects to stream - normally used for debugging
    if d[0] == "class std::basic_ostream<char> &" and d[1].startswith("operator<<(class std::basic_ostream<char> &"):
       continue
    if d[0] == "basic_ostream<type-parameter-?-?, type-parameter-?-?> &" and d[1].startswith("operator<<(basic_ostream<type-parameter-?-?"):
       continue
    if "::operator" in d[1]:
        continue

    location = definitionToSourceLocationMap[d];
    # whacky template stuff
    if location.startswith("sc/source/ui/vba/vbaformat.hxx"): continue
    # not sure how this stuff is called
    if location.startswith("include/test"): continue
    # leave the debug/dump alone
    if location.startswith("include/oox/dump"): continue
    # plugin testing stuff
    if location.startswith("compilerplugins/clang/test"): continue
    # leave this alone for now
    if location.startswith("include/LibreOfficeKit"): continue

    unusedSet.add(d) # used by the "unused return types" analysis
    tmp1set.add((method, location))

# print out the results, sorted by name and line number
with open("compilerplugins/clang/unusedmethods.results", "wt") as f:
    for t in sort_set_by_natural_key(tmp1set):
        f.write(t[1] + "\n")
        f.write("    " + t[0] + "\n")

# --------------------------------------------------------------------------------------------
# "unused return types" analysis
# --------------------------------------------------------------------------------------------

tmp2set = set()
for d in definitionSet:
    method = d[0] + " " + d[1]
    if d in usedReturnSet:
        continue
    if d in unusedSet:
        continue
    if isOtherConstness(d, usedReturnSet):
        continue
    # ignore methods with no return type, and constructors
    if d[0] == "void" or d[0] == "":
        continue
    # ignore bool returns, provides important documentation in the code
    if d[0] == "_Bool":
        continue
    # ignore UNO constructor method entrypoints
    if "_get_implementation" in d[1] or "_getFactory" in d[1]:
        continue
    # the plugin can't see calls to these
    if "operator new" in d[1]:
        continue
    # unused return type is not a problem here
    if ("operator=(" in d[1] or "operator&=" in d[1] or "operator|=" in d[1] or "operator^=" in d[1]
        or "operator+=" in d[1] or "operator-=" in d[1]
        or "operator<<" in d[1] or "operator>>" in d[1]
        or "operator++" in d[1] or "operator--" in d[1]):
        continue
    # ignore external code
    if definitionToSourceLocationMap[d].startswith("external/"):
       continue
    # ignore UNO constructor functions
    if (d[0] == "class com::sun::star::uno::Reference<class com::sun::star::uno::XInterface>" and
        d[1].endswith("_createInstance(const class com::sun::star::uno::Reference<class com::sun::star::lang::XMultiServiceFactory> &)")):
        continue
    if (d[0] == "class com::sun::star::uno::Reference<class com::sun::star::uno::XInterface>" and
        d[1].endswith("_CreateInstance(const class com::sun::star::uno::Reference<class com::sun::star::lang::XMultiServiceFactory> &)")):
        continue
    # debug code
    if d[1] == "writerfilter::ooxml::OOXMLPropertySet::toString()":
        continue
    location = definitionToSourceLocationMap[d];
    # windows only
    if location.startswith("include/svl/svdde.hxx"): continue
    # fluent API (return ref to self)
    if location.startswith("include/tools/stream.hxx"): continue
    tmp2set.add((method, location))

# print output, sorted by name and line number
with open("compilerplugins/clang/unusedmethods.unused-returns.results", "wt") as f:
    for t in sort_set_by_natural_key(tmp2set):
        f.write(t[1] + "\n")
        f.write("    " +  t[0] + "\n")


# --------------------------------------------------------------------------------------------
# "method can be private" analysis
# --------------------------------------------------------------------------------------------

tmp3set = set()
for d in publicDefinitionSet:
    method = d[0] + " " + d[1]
    if d in calledFromOutsideSet:
        continue
    if d in virtualSet:
        continue
    # TODO ignore constructors for now, my called-from-outside analysis doesn't work here
    if d[0] == "":
        continue
    if isOtherConstness(d, calledFromOutsideSet):
        continue
    # ignore external code
    if definitionToSourceLocationMap[d].startswith("external/"):
       continue
    tmp3set.add((method, definitionToSourceLocationMap[d]))

# print output, sorted by name and line number
with open("loplugin.unusedmethods.report-can-be-private", "wt") as f:
    for t in sort_set_by_natural_key(tmp3set):
        f.write(t[1] + "\n")
        f.write("    " + t[0] + "\n")