[PATCH] D66261: [analyzer] Warn about -analyzer-configs being meant for development purposes only

Kristóf Umann via Phabricator via cfe-commits cfe-commits at lists.llvm.org
Wed Aug 14 17:04:04 PDT 2019

Szelethus created this revision.
Szelethus added reviewers: NoQ, xazax.hun, baloghadamsoftware, Charusso, rnkovacs, dcoughlin, dkrupp.
Szelethus added a project: clang.
Herald added subscribers: cfe-commits, gamesh411, donat.nagy, mikhail.ramalho, a.sidorin, szepet, whisperity.

This is more of a temporary fix, long term, we should convert `AnalyzerOptions.def` into the universally beloved (*coughs*) TableGen format, where they can more easily be separated into developer-only, alpha, and user-facing configs.

  rG LLVM Github Monorepo



Index: clang/lib/StaticAnalyzer/Frontend/CheckerRegistration.cpp
--- clang/lib/StaticAnalyzer/Frontend/CheckerRegistration.cpp
+++ clang/lib/StaticAnalyzer/Frontend/CheckerRegistration.cpp
@@ -74,11 +74,22 @@
 void ento::printAnalyzerConfigList(raw_ostream &out) {
-  out << "OVERVIEW: Clang Static Analyzer -analyzer-config Option List\n\n";
-  out << "USAGE: -analyzer-config <OPTION1=VALUE,OPTION2=VALUE,...>\n\n";
-  out << "       -analyzer-config OPTION1=VALUE, -analyzer-config "
-         "OPTION2=VALUE, ...\n\n";
-  out << "OPTIONS:\n\n";
+  // FIXME: This message sounds scary, should be scary, but incorrectly states
+  // that all configs are super dangerous. In reality, many of them should be
+  // accessible to the user. We should create a user-facing subset of config
+  // options under a different frontend flag.
+  out << R"(
+OVERVIEW: Clang Static Analyzer -analyzer-config Option List
+The following list of configurations are meant for development purposes only, as
+some of the variables they define are set to result in the most optimal
+analysis. Setting them to other values may drastically change how the analyzer
+behaves, and may even result in instabilities, crashes!
+USAGE: -analyzer-config <OPTION1=VALUE,OPTION2=VALUE,...>
+       -analyzer-config OPTION1=VALUE, -analyzer-config OPTION2=VALUE, ...
   using OptionAndDescriptionTy = std::pair<StringRef, std::string>;
   OptionAndDescriptionTy PrintableOptions[] = {
Index: clang/include/clang/Driver/CC1Options.td
--- clang/include/clang/Driver/CC1Options.td
+++ clang/include/clang/Driver/CC1Options.td
@@ -140,7 +140,8 @@
            "and debug checkers">;
 def analyzer_config_help : Flag<["-"], "analyzer-config-help">,
-  HelpText<"Display the list of -analyzer-config options">;
+  HelpText<"Display the list of -analyzer-config options. These are meant for "
+           "development purposes only!">;
 def analyzer_list_enabled_checkers : Flag<["-"], "analyzer-list-enabled-checkers">,
   HelpText<"Display the list of enabled analyzer checkers">;

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