[PATCH] D77411: [analyzer] StdLibraryFunctionsChecker: Add test for function with default parameter

[Gabor Marton via Phabricator via cfe-commits]

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

Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D77411

Files:
  clang/lib/StaticAnalyzer/Checkers/StdLibraryFunctionsChecker.cpp
  clang/test/Analysis/std-c-library-functions-arg-constraints.cpp


Index: clang/test/Analysis/std-c-library-functions-arg-constraints.cpp
===================================================================
--- /dev/null
+++ clang/test/Analysis/std-c-library-functions-arg-constraints.cpp
@@ -0,0 +1,18 @@
+// RUN: %clang_analyze_cc1 %s \
+// RUN:   -analyzer-checker=core \
+// RUN:   -analyzer-checker=apiModeling.StdCLibraryFunctions \
+// RUN:   -analyzer-checker=apiModeling.StdCLibraryFunctionArgs \
+// RUN:   -analyzer-checker=debug.StdCLibraryFunctionsTester \
+// RUN:   -analyzer-checker=debug.ExprInspection \
+// RUN:   -analyzer-config eagerly-assume=false \
+// RUN:   -triple i686-unknown-linux \
+// RUN:   -verify
+
+void clang_analyzer_eval(int);
+
+int __defaultparam(void *, int y = 3);
+
+void test_arg_constraint_on_fun_with_default_param() {
+  __defaultparam(nullptr); // \
+  // expected-warning{{Function argument constraint is not satisfied}}
+}
Index: clang/lib/StaticAnalyzer/Checkers/StdLibraryFunctionsChecker.cpp
===================================================================
--- clang/lib/StaticAnalyzer/Checkers/StdLibraryFunctionsChecker.cpp
+++ clang/lib/StaticAnalyzer/Checkers/StdLibraryFunctionsChecker.cpp
@@ -960,6 +960,9 @@
                            ArgumentCondition(0U, OutOfRange, SingleValue(1)))
                        .ArgConstraint(
                            ArgumentCondition(0U, OutOfRange, SingleValue(2)))}},
+        {"__defaultparam", Summaries{Summary(ArgTypes{Irrelevant, IntTy},
+                                             RetType{IntTy}, EvalCallAsPure)
+                                         .ArgConstraint(NotNull(ArgNo(0)))}},
     };
     for (auto &E : TestFunctionSummaryMap) {
       auto InsertRes =


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