Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 240 insertions, 0 deletions

diff --git a/compilerplugins/clang/cppunitassertequals.cxx b/compilerplugins/clang/cppunitassertequals.cxx
new file mode 100644
index 000000000..56f13b822
--- /dev/null
+++ b/compilerplugins/clang/cppunitassertequals.cxx
@@ -0,0 +1,240 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+#ifndef LO_CLANG_SHARED_PLUGINS
+
+#include "plugin.hxx"
+#include "check.hxx"
+#include "compat.hxx"
+#include <iostream>
+
+/**
+  Check for
+   (*) calls to CPPUNIT_ASSERT when it should be using CPPUNIT_ASSERT_EQUALS
+   (*) calls to CPPUNIT_ASSERT_EQUALS where the constant is the second param
+*/
+
+namespace {
+
+class CppunitAssertEquals:
+    public loplugin::FilteringPlugin<CppunitAssertEquals>
+{
+public:
+    explicit CppunitAssertEquals(loplugin::InstantiationData const & data):
+        FilteringPlugin(data) {}
+
+    virtual bool preRun() override
+    {
+        return compiler.getLangOpts().CPlusPlus;
+    }
+
+    virtual void run() override
+    {
+        if (preRun()) {
+            TraverseDecl(compiler.getASTContext().getTranslationUnitDecl());
+        }
+    }
+
+    bool VisitCallExpr(const CallExpr*);
+
+private:
+    void checkExpr(
+        SourceRange range, StringRef name, Expr const * expr, bool negated);
+
+    void reportEquals(
+        SourceRange range, StringRef name, bool negative, Expr const * lhs, Expr const * rhs);
+
+    bool isCompileTimeConstant(Expr const * expr);
+};
+
+bool CppunitAssertEquals::VisitCallExpr(const CallExpr* callExpr)
+{
+    auto const decl = callExpr->getDirectCallee();
+    if (!decl)
+        return true;
+    /*
+       calls to CPPUNIT_ASSERT when it should be using CPPUNIT_ASSERT_EQUALS
+    */
+    if (loplugin::DeclCheck(decl).Function("failIf").Struct("Asserter")
+             .Namespace("CppUnit").GlobalNamespace())
+    {
+        // Don't use callExpr->getLocStart() or callExpr->getExprLoc(), as those
+        // fall into a nested use of the CPPUNIT_NS macro; CallExpr::getRParenLoc
+        // happens to be readily available and cause good results:
+        auto loc = callExpr->getRParenLoc();
+        while (compiler.getSourceManager().isMacroArgExpansion(loc)) {
+            loc = compiler.getSourceManager().getImmediateMacroCallerLoc(loc);
+        }
+        if (!compiler.getSourceManager().isMacroBodyExpansion(loc)
+            || ignoreLocation(
+                compiler.getSourceManager().getImmediateMacroCallerLoc(loc)))
+        {
+            return true;
+        }
+        auto name = Lexer::getImmediateMacroName(
+            loc, compiler.getSourceManager(), compiler.getLangOpts());
+        if (name != "CPPUNIT_ASSERT" && name != "CPPUNIT_ASSERT_MESSAGE") {
+            return true;
+        }
+        if (decl->getNumParams() != 3) {
+            report(
+                DiagnosticsEngine::Warning,
+                ("TODO: suspicious CppUnit::Asserter::failIf call with %0"
+                 " parameters"),
+                callExpr->getExprLoc())
+                << decl->getNumParams() << callExpr->getSourceRange();
+            return true;
+        }
+        auto const e1 = callExpr->getArg(0)->IgnoreParenImpCasts();
+        Expr const * e2 = nullptr;
+        if (auto const e3 = dyn_cast<UnaryOperator>(e1)) {
+            if (e3->getOpcode() == UO_LNot) {
+                e2 = e3->getSubExpr();
+            }
+        } else if (auto const e4 = dyn_cast<CXXOperatorCallExpr>(e1)) {
+            if (e4->getOperator() == OO_Exclaim) {
+                e2 = e4->getArg(0);
+            }
+        }
+        if (e2 == nullptr) {
+            report(
+                DiagnosticsEngine::Warning,
+                ("TODO: suspicious CppUnit::Asserter::failIf call not wrapping"
+                 " !(...)"),
+                callExpr->getExprLoc())
+                << callExpr->getSourceRange();
+            return true;
+        }
+        auto range = compat::getImmediateExpansionRange(compiler.getSourceManager(), loc);
+        checkExpr(
+            SourceRange(range.first, range.second), name,
+            e2->IgnoreParenImpCasts(), false);
+    }
+
+    /**
+      Check for calls to CPPUNIT_ASSERT_EQUALS where the constant is the second param
+    */
+    if (loplugin::DeclCheck(decl).Function("assertEquals").
+             Namespace("CppUnit").GlobalNamespace())
+    {
+        // can happen in template test code that both params are compile time constants
+        if (isCompileTimeConstant(callExpr->getArg(0)))
+            return true;
+        if (isCompileTimeConstant(callExpr->getArg(1)))
+            report(
+                DiagnosticsEngine::Warning,
+                "CPPUNIT_ASSERT_EQUALS parameters look switched, expected value should be first param",
+                callExpr->getExprLoc())
+                << callExpr->getSourceRange();
+    }
+    return true;
+}
+
+// copied from stringconcat.cxx
+Expr const * stripConstructor(Expr const * expr) {
+    auto e0 = expr;
+    auto const e1 = dyn_cast<CXXFunctionalCastExpr>(e0);
+    if (e1 != nullptr) {
+        e0 = e1->getSubExpr()->IgnoreParenImpCasts();
+    }
+    auto const e2 = dyn_cast<CXXBindTemporaryExpr>(e0);
+    if (e2 == nullptr) {
+        return expr;
+    }
+    auto const e3 = dyn_cast<CXXConstructExpr>(
+        e2->getSubExpr()->IgnoreParenImpCasts());
+    if (e3 == nullptr) {
+        return expr;
+    }
+    auto qt = loplugin::DeclCheck(e3->getConstructor());
+    if (!((qt.MemberFunction().Class("OString").Namespace("rtl")
+           .GlobalNamespace())
+          || (qt.MemberFunction().Class("OUString").Namespace("rtl")
+              .GlobalNamespace())))
+    {
+        return expr;
+    }
+    if (e3->getNumArgs() != 2) {
+        return expr;
+    }
+    return e3->getArg(0)->IgnoreParenImpCasts();
+}
+
+bool CppunitAssertEquals::isCompileTimeConstant(Expr const * expr)
+{
+    if (expr->isIntegerConstantExpr(compiler.getASTContext()))
+        return true;
+    // is string literal ?
+    expr = expr->IgnoreParenImpCasts();
+    expr = stripConstructor(expr);
+    return isa<clang::StringLiteral>(expr);
+}
+
+void CppunitAssertEquals::checkExpr(
+    SourceRange range, StringRef name, Expr const * expr, bool negated)
+{
+    if (auto const e = dyn_cast<UnaryOperator>(expr)) {
+        if (e->getOpcode() == UO_LNot) {
+            checkExpr(
+                range, name, e->getSubExpr()->IgnoreParenImpCasts(), !negated);
+        }
+        return;
+    }
+    if (auto const e = dyn_cast<BinaryOperator>(expr)) {
+        auto const op = e->getOpcode();
+        if ((!negated && op == BO_EQ) || (negated && op == BO_NE)) {
+            reportEquals(range, name, op == BO_NE, e->getLHS(), e->getRHS());
+            return;
+        }
+        if ((!negated && op == BO_LAnd) || (negated && op == BO_LOr)) {
+            report(
+                DiagnosticsEngine::Warning,
+                "rather split into two %0", e->getExprLoc())
+                << name << range;
+            return;
+        }
+        return;
+    }
+    if (auto const e = dyn_cast<CXXOperatorCallExpr>(expr)) {
+        auto const op = e->getOperator();
+        if ((!negated && op == OO_EqualEqual)
+            || (negated && op == OO_ExclaimEqual))
+        {
+            reportEquals(range, name, op == OO_ExclaimEqual, e->getArg(0), e->getArg(1));
+            return;
+        }
+        return;
+    }
+}
+
+void CppunitAssertEquals::reportEquals(
+    SourceRange range, StringRef name, bool negative, Expr const * lhs, Expr const * rhs)
+{
+    if (lhs->IgnoreImpCasts()->getType()->isNullPtrType()
+        != rhs->IgnoreImpCasts()->getType()->isNullPtrType())
+    {
+        return;
+    }
+    report(
+        DiagnosticsEngine::Warning,
+        ("rather call"
+         " %select{CPPUNIT_ASSERT_EQUAL|CPPUNIT_ASSERT_EQUAL_MESSAGE}0 when comparing %1 and %2 (or"
+         " rewrite as an explicit operator %select{==|!=}3 call when the"
+         " operator itself is the topic)"),
+        range.getBegin())
+        << (name == "CPPUNIT_ASSERT_MESSAGE") << lhs->IgnoreImpCasts()->getType()
+        << rhs->IgnoreImpCasts()->getType() << negative << range;
+}
+
+loplugin::Plugin::Registration< CppunitAssertEquals > cppunitassertequals("cppunitassertequals");
+
+} // namespace
+
+#endif // LO_CLANG_SHARED_PLUGINS
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */