[analyzer] Add a test for plugins using checker dependencies

Also, I moved the existing analyzer plugin to test/ as well, in order not to
give the illusion that the analyzer supports plugins -- it's capable of handling
them, but does not _support_ them.

Differential Revision: https://reviews.llvm.org/D59464

llvm-svn: 360799
diff --git a/clang/examples/CMakeLists.txt b/clang/examples/CMakeLists.txt
index 8c26548..e4fedf3 100644
--- a/clang/examples/CMakeLists.txt
+++ b/clang/examples/CMakeLists.txt
@@ -3,9 +3,6 @@
   set(EXCLUDE_FROM_ALL ON)
 endif()
 
-if(CLANG_ENABLE_STATIC_ANALYZER)
-add_subdirectory(analyzer-plugin)
-endif()
 add_subdirectory(clang-interpreter)
 add_subdirectory(PrintFunctionNames)
 add_subdirectory(AnnotateFunctions)
diff --git a/clang/test/Analysis/checker-plugins.c b/clang/test/Analysis/checker-plugins.c
index ee60ec6..f0a5484 100644
--- a/clang/test/Analysis/checker-plugins.c
+++ b/clang/test/Analysis/checker-plugins.c
@@ -1,5 +1,8 @@
-// RUN: %clang_analyze_cc1 -load %llvmshlibdir/SampleAnalyzerPlugin%pluginext -analyzer-checker='example.MainCallChecker' -verify %s
-// REQUIRES: plugins, examples
+// RUN: %clang_analyze_cc1 -verify %s \
+// RUN:   -load %llvmshlibdir/SampleAnalyzerPlugin%pluginext \
+// RUN:   -analyzer-checker='example.MainCallChecker'
+
+// REQUIRES: plugins
 
 // Test that the MainCallChecker example analyzer plugin loads and runs.
 
@@ -8,3 +11,22 @@
 void caller() {
   main(); // expected-warning {{call to main}}
 }
+
+// RUN: %clang_analyze_cc1 %s \
+// RUN:   -load %llvmshlibdir/CheckerDependencyHandlingAnalyzerPlugin%pluginext\
+// RUN:   -analyzer-checker=example.DependendentChecker \
+// RUN:   -analyzer-list-enabled-checkers \
+// RUN:   2>&1 | FileCheck %s -check-prefix=CHECK-IMPLICITLY-ENABLED
+
+// CHECK-IMPLICITLY-ENABLED: example.Dependency
+// CHECK-IMPLICITLY-ENABLED: example.DependendentChecker
+
+// RUN: %clang_analyze_cc1 %s \
+// RUN:   -load %llvmshlibdir/CheckerDependencyHandlingAnalyzerPlugin%pluginext\
+// RUN:   -analyzer-checker=example.DependendentChecker \
+// RUN:   -analyzer-disable-checker=example.Dependency \
+// RUN:   -analyzer-list-enabled-checkers \
+// RUN:   2>&1 | FileCheck %s -check-prefix=CHECK-IMPLICITLY-DISABLED
+
+// CHECK-IMPLICITLY-DISABLED-NOT: example.Dependency
+// CHECK-IMPLICITLY-DISABLED-NOT: example.DependendentChecker
diff --git a/clang/test/Analysis/lit.local.cfg b/clang/test/Analysis/lit.local.cfg
index 84f7569..b77cae8 100644
--- a/clang/test/Analysis/lit.local.cfg
+++ b/clang/test/Analysis/lit.local.cfg
@@ -18,5 +18,7 @@
 config.substitutions.append(('%diff_sarif',
     '''diff -U1 -w -I ".*file:.*%basename_t" -I '"version":' -I "2\.0\.0\-csd\.[0-9]*\.beta\."'''))
 
+config.excludes.add('plugins')
+
 if not config.root.clang_staticanalyzer:
     config.unsupported = True
diff --git a/clang/test/Analysis/plugins/CMakeLists.txt b/clang/test/Analysis/plugins/CMakeLists.txt
new file mode 100644
index 0000000..3f538d9
--- /dev/null
+++ b/clang/test/Analysis/plugins/CMakeLists.txt
@@ -0,0 +1,10 @@
+add_subdirectory(SampleAnalyzer)
+add_subdirectory(CheckerDependencyHandling)
+
+set(CLANG_ANALYZER_PLUGIN_DEPS
+  SampleAnalyzerPlugin
+  CheckerDependencyHandlingAnalyzerPlugin
+  )
+
+add_custom_target(clang-analyzer-plugin
+  DEPENDS ${CLANG_ANALYZER_PLUGIN_DEPS})
diff --git a/clang/test/Analysis/plugins/CheckerDependencyHandling/CMakeLists.txt b/clang/test/Analysis/plugins/CheckerDependencyHandling/CMakeLists.txt
new file mode 100644
index 0000000..80e2cdb
--- /dev/null
+++ b/clang/test/Analysis/plugins/CheckerDependencyHandling/CMakeLists.txt
@@ -0,0 +1,11 @@
+set(LLVM_EXPORTED_SYMBOL_FILE ${CMAKE_CURRENT_SOURCE_DIR}/CheckerDependencyHandlingAnalyzerPlugin.exports)
+add_llvm_library(CheckerDependencyHandlingAnalyzerPlugin MODULE CheckerDependencyHandling.cpp PLUGIN_TOOL clang)
+
+if(LLVM_ENABLE_PLUGINS AND (WIN32 OR CYGWIN))
+  target_link_libraries(CheckerDependencyHandlingAnalyzerPlugin PRIVATE
+    clangAnalysis
+    clangAST
+    clangStaticAnalyzerCore
+    LLVMSupport
+    )
+endif()
diff --git a/clang/test/Analysis/plugins/CheckerDependencyHandling/CheckerDependencyHandling.cpp b/clang/test/Analysis/plugins/CheckerDependencyHandling/CheckerDependencyHandling.cpp
new file mode 100644
index 0000000..be8e120
--- /dev/null
+++ b/clang/test/Analysis/plugins/CheckerDependencyHandling/CheckerDependencyHandling.cpp
@@ -0,0 +1,28 @@
+#include "clang/StaticAnalyzer/Core/BugReporter/BugType.h"
+#include "clang/StaticAnalyzer/Core/Checker.h"
+#include "clang/StaticAnalyzer/Core/PathSensitive/CheckerContext.h"
+#include "clang/StaticAnalyzer/Frontend/CheckerRegistry.h"
+
+using namespace clang;
+using namespace ento;
+
+namespace {
+struct Dependency : public Checker<check::BeginFunction> {
+  void checkBeginFunction(CheckerContext &Ctx) const {}
+};
+struct DependendentChecker : public Checker<check::BeginFunction> {
+  void checkBeginFunction(CheckerContext &Ctx) const {}
+};
+} // end anonymous namespace
+
+// Register plugin!
+extern "C" void clang_registerCheckers(CheckerRegistry &registry) {
+  registry.addChecker<Dependency>("example.Dependency", "", "");
+  registry.addChecker<DependendentChecker>("example.DependendentChecker", "",
+                                           "");
+
+  registry.addDependency("example.DependendentChecker", "example.Dependency");
+}
+
+extern "C" const char clang_analyzerAPIVersionString[] =
+    CLANG_ANALYZER_API_VERSION_STRING;
diff --git a/clang/examples/analyzer-plugin/SampleAnalyzerPlugin.exports b/clang/test/Analysis/plugins/CheckerDependencyHandling/CheckerDependencyHandlingAnalyzerPlugin.exports
similarity index 100%
copy from clang/examples/analyzer-plugin/SampleAnalyzerPlugin.exports
copy to clang/test/Analysis/plugins/CheckerDependencyHandling/CheckerDependencyHandlingAnalyzerPlugin.exports
diff --git a/clang/examples/analyzer-plugin/CMakeLists.txt b/clang/test/Analysis/plugins/SampleAnalyzer/CMakeLists.txt
similarity index 100%
rename from clang/examples/analyzer-plugin/CMakeLists.txt
rename to clang/test/Analysis/plugins/SampleAnalyzer/CMakeLists.txt
diff --git a/clang/examples/analyzer-plugin/MainCallChecker.cpp b/clang/test/Analysis/plugins/SampleAnalyzer/MainCallChecker.cpp
similarity index 74%
rename from clang/examples/analyzer-plugin/MainCallChecker.cpp
rename to clang/test/Analysis/plugins/SampleAnalyzer/MainCallChecker.cpp
index 77316d6..8bd4085 100644
--- a/clang/examples/analyzer-plugin/MainCallChecker.cpp
+++ b/clang/test/Analysis/plugins/SampleAnalyzer/MainCallChecker.cpp
@@ -1,13 +1,13 @@
-#include "clang/StaticAnalyzer/Core/Checker.h"
 #include "clang/StaticAnalyzer/Core/BugReporter/BugType.h"
-#include "clang/StaticAnalyzer/Frontend/CheckerRegistry.h"
+#include "clang/StaticAnalyzer/Core/Checker.h"
 #include "clang/StaticAnalyzer/Core/PathSensitive/CheckerContext.h"
+#include "clang/StaticAnalyzer/Frontend/CheckerRegistry.h"
 
 using namespace clang;
 using namespace ento;
 
 namespace {
-class MainCallChecker : public Checker < check::PreStmt<CallExpr> > {
+class MainCallChecker : public Checker<check::PreStmt<CallExpr>> {
   mutable std::unique_ptr<BugType> BT;
 
 public:
@@ -15,7 +15,8 @@
 };
 } // end anonymous namespace
 
-void MainCallChecker::checkPreStmt(const CallExpr *CE, CheckerContext &C) const {
+void MainCallChecker::checkPreStmt(const CallExpr *CE,
+                                   CheckerContext &C) const {
   const Expr *Callee = CE->getCallee();
   const FunctionDecl *FD = C.getSVal(Callee).getAsFunctionDecl();
 
@@ -24,7 +25,7 @@
 
   // Get the name of the callee.
   IdentifierInfo *II = FD->getIdentifier();
-  if (!II)   // if no identifier, not a simple C function
+  if (!II) // if no identifier, not a simple C function
     return;
 
   if (II->isStr("main")) {
@@ -43,12 +44,11 @@
 }
 
 // Register plugin!
-extern "C"
-void clang_registerCheckers (CheckerRegistry &registry) {
+extern "C" void clang_registerCheckers(CheckerRegistry &registry) {
   registry.addChecker<MainCallChecker>(
       "example.MainCallChecker", "Disallows calls to functions called main",
       "");
 }
 
-extern "C"
-const char clang_analyzerAPIVersionString[] = CLANG_ANALYZER_API_VERSION_STRING;
+extern "C" const char clang_analyzerAPIVersionString[] =
+    CLANG_ANALYZER_API_VERSION_STRING;
diff --git a/clang/examples/analyzer-plugin/SampleAnalyzerPlugin.exports b/clang/test/Analysis/plugins/SampleAnalyzer/SampleAnalyzerPlugin.exports
similarity index 100%
rename from clang/examples/analyzer-plugin/SampleAnalyzerPlugin.exports
rename to clang/test/Analysis/plugins/SampleAnalyzer/SampleAnalyzerPlugin.exports
diff --git a/clang/test/CMakeLists.txt b/clang/test/CMakeLists.txt
index 65a1d6e9..43e49d5 100644
--- a/clang/test/CMakeLists.txt
+++ b/clang/test/CMakeLists.txt
@@ -139,13 +139,15 @@
   # check-all would launch those tests via check-clang.
   set(EXCLUDE_FROM_ALL ON)
 
+  add_subdirectory(Analysis/plugins)
+  list(APPEND CLANG_TEST_DEPS clang-analyzer-plugin)
+
   add_lit_testsuite(check-clang-analyzer "Running the Clang analyzer tests"
     ${CMAKE_CURRENT_BINARY_DIR}/Analysis
     PARAMS ${ANALYZER_TEST_PARAMS}
     DEPENDS ${CLANG_TEST_DEPS})
   set_target_properties(check-clang-analyzer PROPERTIES FOLDER "Clang tests")
 
-
   if (LLVM_WITH_Z3)
     add_lit_testsuite(check-clang-analyzer-z3 "Running the Clang analyzer tests, using Z3 as a solver"
       ${CMAKE_CURRENT_BINARY_DIR}/Analysis