[analyzer] Evaluate all non-checker config options before analysis

In earlier patches regarding AnalyzerOptions, a lot of effort went into
gathering all config options, and changing the interface so that potential
misuse can be eliminited.

Up until this point, AnalyzerOptions only evaluated an option when it was
querried. For example, if we had a "-no-false-positives" flag, AnalyzerOptions
would store an Optional field for it that would be None up until somewhere in
the code until the flag's getter function is called.

However, now that we're confident that we've gathered all configs, we can
evaluate off of them before analysis, so we can emit a error on invalid input
even if that prticular flag will not matter in that particular run of the
analyzer. Another very big benefit of this is that debug.ConfigDumper will now
show the value of all configs every single time.

Also, almost all options related class have a similar interface, so uniformity
is also a benefit.

The implementation for errors on invalid input will be commited shorty.

Differential Revision: https://reviews.llvm.org/D53692

llvm-svn: 348031

1 files changed, 63 insertions, 0 deletions

diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index f511fdcd87a..f90e9300cd4 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -181,6 +181,9 @@ static void addDiagnosticArgs(ArgList &Args, OptSpecifier Group,
   }
 }
 
+static void parseAnalyzerConfigs(AnalyzerOptions &AnOpts,
+                                 DiagnosticsEngine &Diags);
+
 static void getAllNoBuiltinFuncValues(ArgList &Args,
                                       std::vector<std::string> &Funcs) {
   SmallVector<const char *, 8> Values;
@@ -343,6 +346,8 @@ static bool ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
     }
   }
 
+  parseAnalyzerConfigs(Opts, Diags);
+
   llvm::raw_string_ostream os(Opts.FullCompilerInvocation);
   for (unsigned i = 0; i < Args.getNumInputArgStrings(); ++i) {
     if (i != 0)
@@ -354,6 +359,64 @@ static bool ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
   return Success;
 }
 
+static StringRef getStringOption(AnalyzerOptions::ConfigTable &Config,
+                                 StringRef OptionName, StringRef DefaultVal) {
+  return Config.insert({OptionName, DefaultVal}).first->second;
+}
+
+static void initOption(AnalyzerOptions::ConfigTable &Config,
+                       StringRef &OptionField, StringRef Name,
+                       StringRef DefaultVal) {
+  OptionField = getStringOption(Config, Name, DefaultVal);
+}
+
+static void initOption(AnalyzerOptions::ConfigTable &Config,
+                       bool &OptionField, StringRef Name, bool DefaultVal) {
+  // FIXME: We should emit a warning here if the value is something other than
+  // "true", "false", or the empty string (meaning the default value),
+  // but the AnalyzerOptions doesn't have access to a diagnostic engine.
+  OptionField = llvm::StringSwitch<bool>(getStringOption(Config, Name,
+                                               (DefaultVal ? "true" : "false")))
+      .Case("true", true)
+      .Case("false", false)
+      .Default(DefaultVal);
+}
+
+static void initOption(AnalyzerOptions::ConfigTable &Config,
+                       unsigned &OptionField, StringRef Name,
+                       unsigned DefaultVal) {
+  OptionField = DefaultVal;
+  bool HasFailed = getStringOption(Config, Name, std::to_string(DefaultVal))
+                     .getAsInteger(10, OptionField);
+  assert(!HasFailed && "analyzer-config option should be numeric");
+  (void)HasFailed;
+}
+
+static void parseAnalyzerConfigs(AnalyzerOptions &AnOpts,
+                                 DiagnosticsEngine &Diags) {
+  // TODO: Emit warnings for incorrect options.
+  // TODO: There's no need to store the entire configtable, it'd be plenty
+  // enough tostore checker options.
+
+#define ANALYZER_OPTION(TYPE, NAME, CMDFLAG, DESC, DEFAULT_VAL)                \
+  initOption(AnOpts.Config, AnOpts.NAME, CMDFLAG, DEFAULT_VAL);                \
+
+#define ANALYZER_OPTION_DEPENDS_ON_USER_MODE(TYPE, NAME, CMDFLAG, DESC,        \
+                                           SHALLOW_VAL, DEEP_VAL)              \
+  switch (AnOpts.getUserMode()) {                                              \
+  case UMK_Shallow:                                                            \
+    initOption(AnOpts.Config, AnOpts.NAME, CMDFLAG, SHALLOW_VAL);              \
+    break;                                                                     \
+  case UMK_Deep:                                                               \
+    initOption(AnOpts.Config, AnOpts.NAME, CMDFLAG, DEEP_VAL);                 \
+    break;                                                                     \
+  }                                                                            \
+
+#include "clang/StaticAnalyzer/Core/AnalyzerOptions.def"
+#undef ANALYZER_OPTION
+#undef ANALYZER_OPTION_DEPENDS_ON_USER_MODE
+}
+
 static bool ParseMigratorArgs(MigratorOptions &Opts, ArgList &Args) {
   Opts.NoNSAllocReallocError = Args.hasArg(OPT_migrator_no_nsalloc_error);
   Opts.NoFinalizeRemoval = Args.hasArg(OPT_migrator_no_finalize_removal);