[PATCH] D84603: Thread safety analysis: More consistent warning message

[Aaron Puchert via Phabricator via cfe-commits]

This revision was automatically updated to reflect the committed changes.
aaronpuchert marked an inline comment as done.
Closed by commit rG8ca00c5cdc0b: Thread safety analysis: More consistent warning message (authored by aaronpuchert).

Changed prior to commit:
  https://reviews.llvm.org/D84603?vs=288820&id=289283#toc

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D84603/new/

https://reviews.llvm.org/D84603

Files:
  clang/include/clang/Analysis/Analyses/ThreadSafety.h
  clang/include/clang/Basic/DiagnosticSemaKinds.td
  clang/lib/Analysis/ThreadSafety.cpp
  clang/lib/Sema/AnalysisBasedWarnings.cpp
  clang/test/SemaCXX/warn-thread-safety-analysis.cpp
  clang/test/SemaCXX/warn-thread-safety-negative.cpp


Index: clang/test/SemaCXX/warn-thread-safety-negative.cpp
===================================================================
--- clang/test/SemaCXX/warn-thread-safety-negative.cpp
+++ clang/test/SemaCXX/warn-thread-safety-negative.cpp
@@ -50,7 +50,7 @@
   }
 
   void bar() {
-    baz();        // expected-warning {{calling function 'baz' requires holding  '!mu'}}
+    baz();        // expected-warning {{calling function 'baz' requires negative capability '!mu'}}
   }
 
   void baz() EXCLUSIVE_LOCKS_REQUIRED(!mu) {
Index: clang/test/SemaCXX/warn-thread-safety-analysis.cpp
===================================================================
--- clang/test/SemaCXX/warn-thread-safety-analysis.cpp
+++ clang/test/SemaCXX/warn-thread-safety-analysis.cpp
@@ -4985,7 +4985,7 @@
   }
 
   void bar() {
-    bar2();       // expected-warning {{calling function 'bar2' requires holding  '!mu'}}
+    bar2();       // expected-warning {{calling function 'bar2' requires negative capability '!mu'}}
   }
 
   void bar2() EXCLUSIVE_LOCKS_REQUIRED(!mu) {
Index: clang/lib/Sema/AnalysisBasedWarnings.cpp
===================================================================
--- clang/lib/Sema/AnalysisBasedWarnings.cpp
+++ clang/lib/Sema/AnalysisBasedWarnings.cpp
@@ -1892,6 +1892,13 @@
     Warnings.emplace_back(std::move(Warning), getNotes());
   }
 
+  void handleNegativeNotHeld(const NamedDecl *D, Name LockName,
+                             SourceLocation Loc) override {
+    PartialDiagnosticAt Warning(
+        Loc, S.PDiag(diag::warn_fun_requires_negative_cap) << D << LockName);
+    Warnings.emplace_back(std::move(Warning), getNotes());
+  }
+
   void handleFunExcludesLock(StringRef Kind, Name FunName, Name LockName,
                              SourceLocation Loc) override {
     PartialDiagnosticAt Warning(Loc, S.PDiag(diag::warn_fun_excludes_mutex)
Index: clang/lib/Analysis/ThreadSafety.cpp
===================================================================
--- clang/lib/Analysis/ThreadSafety.cpp
+++ clang/lib/Analysis/ThreadSafety.cpp
@@ -1641,8 +1641,7 @@
     // Otherwise the negative requirement must be propagated to the caller.
     LDat = FSet.findLock(Analyzer->FactMan, Cp);
     if (!LDat) {
-      Analyzer->Handler.handleMutexNotHeld("", D, POK, Cp.toString(),
-                                           LK_Shared, Loc);
+      Analyzer->Handler.handleNegativeNotHeld(D, Cp.toString(), Loc);
     }
     return;
   }
Index: clang/include/clang/Basic/DiagnosticSemaKinds.td
===================================================================
--- clang/include/clang/Basic/DiagnosticSemaKinds.td
+++ clang/include/clang/Basic/DiagnosticSemaKinds.td
@@ -3477,6 +3477,9 @@
 def warn_acquire_requires_negative_cap : Warning<
   "acquiring %0 '%1' requires negative capability '%2'">,
   InGroup<ThreadSafetyNegative>, DefaultIgnore;
+def warn_fun_requires_negative_cap : Warning<
+  "calling function %0 requires negative capability '%1'">,
+  InGroup<ThreadSafetyAnalysis>, DefaultIgnore;
 
 // Thread safety warnings on pass by reference
 def warn_guarded_pass_by_reference : Warning<
Index: clang/include/clang/Analysis/Analyses/ThreadSafety.h
===================================================================
--- clang/include/clang/Analysis/Analyses/ThreadSafety.h
+++ clang/include/clang/Analysis/Analyses/ThreadSafety.h
@@ -202,6 +202,14 @@
   virtual void handleNegativeNotHeld(StringRef Kind, Name LockName, Name Neg,
                                      SourceLocation Loc) {}
 
+  /// Warn when calling a function that a negative capability is not held.
+  /// \param D -- The decl for the function requiring the negative capability.
+  /// \param LockName -- The name for the lock expression, to be printed in the
+  /// diagnostic.
+  /// \param Loc -- The location of the protected operation.
+  virtual void handleNegativeNotHeld(const NamedDecl *D, Name LockName,
+                                     SourceLocation Loc) {}
+
   /// Warn when a function is called while an excluded mutex is locked. For
   /// example, the mutex may be locked inside the function.
   /// \param Kind -- the capability's name parameter (role, mutex, etc).


-------------- next part --------------
A non-text attachment was scrubbed...
Name: D84603.289283.patch
Type: text/x-patch
Size: 4186 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/cfe-commits/attachments/20200901/f5c1941c/attachment-0001.bin>