AnalyzerOptions.cpp revision 50fa64d4411a42e0b4f373a84d8d4f5cbf339ea3 
1//===-- AnalyzerOptions.cpp - Analysis Engine Options -----------*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file contains special accessors for analyzer configuration options
11// with string representations.
12//
13//===----------------------------------------------------------------------===//
14
15#include "clang/StaticAnalyzer/Core/AnalyzerOptions.h"
16#include "llvm/ADT/SmallString.h"
17#include "llvm/ADT/StringSwitch.h"
18#include "llvm/Support/ErrorHandling.h"
19#include "llvm/Support/raw_ostream.h"
20
21using namespace clang;
22using namespace llvm;
23
24AnalyzerOptions::UserModeKind AnalyzerOptions::getUserMode() {
25  if (UserMode == UMK_NotSet) {
26    StringRef ModeStr(Config.GetOrCreateValue("mode", "deep").getValue());
27    UserMode = llvm::StringSwitch<UserModeKind>(ModeStr)
28      .Case("shallow", UMK_Shallow)
29      .Case("deep", UMK_Deep)
30      .Default(UMK_NotSet);
31    assert(UserMode != UMK_NotSet && "User mode is invalid.");
32  }
33  return UserMode;
34}
35
36IPAKind AnalyzerOptions::getIPAMode() {
37  if (IPAMode == IPAK_NotSet) {
38
39    // Use the User Mode to set the default IPA value.
40    // Note, we have to add the string to the Config map for the ConfigDumper
41    // checker to function properly.
42    const char *DefaultIPA = 0;
43    UserModeKind HighLevelMode = getUserMode();
44    if (HighLevelMode == UMK_Shallow)
45      DefaultIPA = "inlining";
46    else if (HighLevelMode == UMK_Deep)
47      DefaultIPA = "dynamic-bifurcate";
48    assert(DefaultIPA);
49
50    // Lookup the ipa configuration option, use the default from User Mode.
51    StringRef ModeStr(Config.GetOrCreateValue("ipa", DefaultIPA).getValue());
52    IPAKind IPAConfig = llvm::StringSwitch<IPAKind>(ModeStr)
53            .Case("none", IPAK_None)
54            .Case("basic-inlining", IPAK_BasicInlining)
55            .Case("inlining", IPAK_Inlining)
56            .Case("dynamic", IPAK_DynamicDispatch)
57            .Case("dynamic-bifurcate", IPAK_DynamicDispatchBifurcate)
58            .Default(IPAK_NotSet);
59    assert(IPAConfig != IPAK_NotSet && "IPA Mode is invalid.");
60
61    // Set the member variable.
62    IPAMode = IPAConfig;
63  }
64
65  return IPAMode;
66}
67
68bool
69AnalyzerOptions::mayInlineCXXMemberFunction(CXXInlineableMemberKind K) {
70  if (getIPAMode() < IPAK_Inlining)
71    return false;
72
73  if (!CXXMemberInliningMode) {
74    static const char *ModeKey = "c++-inlining";
75
76    StringRef ModeStr(Config.GetOrCreateValue(ModeKey,
77                                              "destructors").getValue());
78
79    CXXInlineableMemberKind &MutableMode =
80      const_cast<CXXInlineableMemberKind &>(CXXMemberInliningMode);
81
82    MutableMode = llvm::StringSwitch<CXXInlineableMemberKind>(ModeStr)
83      .Case("constructors", CIMK_Constructors)
84      .Case("destructors", CIMK_Destructors)
85      .Case("none", CIMK_None)
86      .Case("methods", CIMK_MemberFunctions)
87      .Default(CXXInlineableMemberKind());
88
89    if (!MutableMode) {
90      // FIXME: We should emit a warning here about an unknown inlining kind,
91      // but the AnalyzerOptions doesn't have access to a diagnostic engine.
92      MutableMode = CIMK_None;
93    }
94  }
95
96  return CXXMemberInliningMode >= K;
97}
98
99static StringRef toString(bool b) { return b ? "true" : "false"; }
100
101bool AnalyzerOptions::getBooleanOption(StringRef Name, bool DefaultVal) {
102  // FIXME: We should emit a warning here if the value is something other than
103  // "true", "false", or the empty string (meaning the default value),
104  // but the AnalyzerOptions doesn't have access to a diagnostic engine.
105  StringRef V(Config.GetOrCreateValue(Name, toString(DefaultVal)).getValue());
106  return llvm::StringSwitch<bool>(V)
107      .Case("true", true)
108      .Case("false", false)
109      .Default(DefaultVal);
110}
111
112bool AnalyzerOptions::getBooleanOption(Optional<bool> &V, StringRef Name,
113                                       bool DefaultVal) {
114  if (!V.hasValue())
115    V = getBooleanOption(Name, DefaultVal);
116  return V.getValue();
117}
118
119bool AnalyzerOptions::includeTemporaryDtorsInCFG() {
120  return getBooleanOption(IncludeTemporaryDtorsInCFG,
121                          "cfg-temporary-dtors",
122                          /* Default = */ false);
123}
124
125bool AnalyzerOptions::mayInlineCXXStandardLibrary() {
126  return getBooleanOption(InlineCXXStandardLibrary,
127                          "c++-stdlib-inlining",
128                          /*Default=*/true);
129}
130
131bool AnalyzerOptions::mayInlineTemplateFunctions() {
132  return getBooleanOption(InlineTemplateFunctions,
133                          "c++-template-inlining",
134                          /*Default=*/true);
135}
136
137bool AnalyzerOptions::mayInlineCXXContainerCtorsAndDtors() {
138  return getBooleanOption(InlineCXXContainerCtorsAndDtors,
139                          "c++-container-inlining",
140                          /*Default=*/false);
141}
142
143bool AnalyzerOptions::mayInlineCXXSharedPtrDtor() {
144  return getBooleanOption(InlineCXXSharedPtrDtor,
145                          "c++-shared_ptr-inlining",
146                          /*Default=*/false);
147}
148
149
150bool AnalyzerOptions::mayInlineObjCMethod() {
151  return getBooleanOption(ObjCInliningMode,
152                          "objc-inlining",
153                          /* Default = */ true);
154}
155
156bool AnalyzerOptions::shouldSuppressNullReturnPaths() {
157  return getBooleanOption(SuppressNullReturnPaths,
158                          "suppress-null-return-paths",
159                          /* Default = */ true);
160}
161
162bool AnalyzerOptions::shouldAvoidSuppressingNullArgumentPaths() {
163  return getBooleanOption(AvoidSuppressingNullArgumentPaths,
164                          "avoid-suppressing-null-argument-paths",
165                          /* Default = */ false);
166}
167
168bool AnalyzerOptions::shouldSuppressInlinedDefensiveChecks() {
169  return getBooleanOption(SuppressInlinedDefensiveChecks,
170                          "suppress-inlined-defensive-checks",
171                          /* Default = */ true);
172}
173
174bool AnalyzerOptions::shouldSuppressFromCXXStandardLibrary() {
175  return getBooleanOption(SuppressFromCXXStandardLibrary,
176                          "suppress-c++-stdlib",
177                          /* Default = */ false);
178}
179
180bool AnalyzerOptions::shouldReportIssuesInMainSourceFile() {
181  return getBooleanOption(ReportIssuesInMainSourceFile,
182                          "report-in-main-source-file",
183                          /* Default = */ false);
184}
185
186int AnalyzerOptions::getOptionAsInteger(StringRef Name, int DefaultVal) {
187  SmallString<10> StrBuf;
188  llvm::raw_svector_ostream OS(StrBuf);
189  OS << DefaultVal;
190
191  StringRef V(Config.GetOrCreateValue(Name, OS.str()).getValue());
192  int Res = DefaultVal;
193  bool b = V.getAsInteger(10, Res);
194  assert(!b && "analyzer-config option should be numeric");
195  (void) b;
196  return Res;
197}
198
199unsigned AnalyzerOptions::getAlwaysInlineSize() {
200  if (!AlwaysInlineSize.hasValue())
201    AlwaysInlineSize = getOptionAsInteger("ipa-always-inline-size", 3);
202  return AlwaysInlineSize.getValue();
203}
204
205unsigned AnalyzerOptions::getMaxInlinableSize() {
206  if (!MaxInlinableSize.hasValue()) {
207
208    int DefaultValue = 0;
209    UserModeKind HighLevelMode = getUserMode();
210    switch (HighLevelMode) {
211      default:
212        llvm_unreachable("Invalid mode.");
213      case UMK_Shallow:
214        DefaultValue = 4;
215        break;
216      case UMK_Deep:
217        DefaultValue = 50;
218        break;
219    }
220
221    MaxInlinableSize = getOptionAsInteger("max-inlinable-size", DefaultValue);
222  }
223  return MaxInlinableSize.getValue();
224}
225
226unsigned AnalyzerOptions::getGraphTrimInterval() {
227  if (!GraphTrimInterval.hasValue())
228    GraphTrimInterval = getOptionAsInteger("graph-trim-interval", 1000);
229  return GraphTrimInterval.getValue();
230}
231
232unsigned AnalyzerOptions::getMaxTimesInlineLarge() {
233  if (!MaxTimesInlineLarge.hasValue())
234    MaxTimesInlineLarge = getOptionAsInteger("max-times-inline-large", 32);
235  return MaxTimesInlineLarge.getValue();
236}
237
238unsigned AnalyzerOptions::getMaxNodesPerTopLevelFunction() {
239  if (!MaxNodesPerTopLevelFunction.hasValue()) {
240    int DefaultValue = 0;
241    UserModeKind HighLevelMode = getUserMode();
242    switch (HighLevelMode) {
243      default:
244        llvm_unreachable("Invalid mode.");
245      case UMK_Shallow:
246        DefaultValue = 75000;
247        break;
248      case UMK_Deep:
249        DefaultValue = 150000;
250        break;
251    }
252    MaxNodesPerTopLevelFunction = getOptionAsInteger("max-nodes", DefaultValue);
253  }
254  return MaxNodesPerTopLevelFunction.getValue();
255}
256
257bool AnalyzerOptions::shouldSynthesizeBodies() {
258  return getBooleanOption("faux-bodies", true);
259}
260
261bool AnalyzerOptions::shouldPrunePaths() {
262  return getBooleanOption("prune-paths", true);
263}
264
265bool AnalyzerOptions::shouldConditionalizeStaticInitializers() {
266  return getBooleanOption("cfg-conditional-static-initializers", true);
267}
268
269