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

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.

Differential Revision: https://reviews.llvm.org/D66261

llvm-svn: 368980

2 files changed, 18 insertions, 6 deletions

diff --git a/clang/include/clang/Driver/CC1Options.td b/clang/include/clang/Driver/CC1Options.td
index 6a32754926e..2a93b829335 100644
--- a/clang/include/clang/Driver/CC1Options.td
+++ b/clang/include/clang/Driver/CC1Options.td
@@ -140,7 +140,8 @@ def analyzer_checker_help_developer : Flag<["-"], "analyzer-checker-help-develop
            "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">;
diff --git a/clang/lib/StaticAnalyzer/Frontend/CheckerRegistration.cpp b/clang/lib/StaticAnalyzer/Frontend/CheckerRegistration.cpp
index 9571679ef12..f4f06e32cd1 100644
--- a/clang/lib/StaticAnalyzer/Frontend/CheckerRegistration.cpp
+++ b/clang/lib/StaticAnalyzer/Frontend/CheckerRegistration.cpp
@@ -74,11 +74,22 @@ void ento::printCheckerConfigList(raw_ostream &OS,
 }
 
 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, ...
+OPTIONS:
+)";
 
   using OptionAndDescriptionTy = std::pair<StringRef, std::string>;
   OptionAndDescriptionTy PrintableOptions[] = {