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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* Based on LLVM/Clang.
*
* This file is distributed under the University of Illinois Open Source
* License. See LICENSE.TXT for details.
*
*/
#ifndef LO_CLANG_SHARED_PLUGINS
#include "check.hxx"
#include "plugin.hxx"
#include <clang/Lex/Lexer.h>
#include <fstream>
#include <set>
#include <stack>
namespace loplugin
{
/*
This is a compile check.
Check that DBG_UNHANDLED_EXCEPTION is always the first statement in a catch block, otherwise
it does not work properly.
*/
class DbgUnhandledException : public loplugin::FilteringPlugin<DbgUnhandledException>
{
public:
explicit DbgUnhandledException(InstantiationData const& data);
virtual void run() override;
bool VisitCallExpr(CallExpr const* call);
bool TraverseCXXCatchStmt(CXXCatchStmt*);
bool PreTraverseCXXCatchStmt(CXXCatchStmt*);
bool PostTraverseCXXCatchStmt(CXXCatchStmt*, bool traverseOk);
private:
std::stack<CXXCatchStmt const*> currCatchStmt;
};
DbgUnhandledException::DbgUnhandledException(const InstantiationData& data)
: FilteringPlugin(data)
{
}
void DbgUnhandledException::run()
{
TraverseDecl(compiler.getASTContext().getTranslationUnitDecl());
}
bool DbgUnhandledException::PreTraverseCXXCatchStmt(CXXCatchStmt* catchStmt)
{
currCatchStmt.push(catchStmt);
return true;
}
bool DbgUnhandledException::PostTraverseCXXCatchStmt(CXXCatchStmt* catchStmt, bool)
{
assert(currCatchStmt.top() == catchStmt);
(void)catchStmt;
currCatchStmt.pop();
return true;
}
bool DbgUnhandledException::TraverseCXXCatchStmt(CXXCatchStmt* catchStmt)
{
if (!PreTraverseCXXCatchStmt(catchStmt))
return false;
bool ret = RecursiveASTVisitor::TraverseCXXCatchStmt(catchStmt);
if (!PostTraverseCXXCatchStmt(catchStmt, ret))
return false;
return ret;
}
bool DbgUnhandledException::VisitCallExpr(const CallExpr* call)
{
if (ignoreLocation(call))
return true;
const FunctionDecl* func = call->getDirectCallee();
if (!func)
return true;
if (!func->getIdentifier() || func->getName() != "DbgUnhandledException")
return true;
if (currCatchStmt.empty())
{
report(DiagnosticsEngine::Warning, "DBG_UNHANDLED_EXCEPTION outside catch block",
call->getBeginLoc());
return true;
}
auto catchBlock = dyn_cast<CompoundStmt>(currCatchStmt.top()->getHandlerBlock());
if (!catchBlock)
{
report(DiagnosticsEngine::Warning,
"something wrong with DBG_UNHANDLED_EXCEPTION, no CompoundStmt?",
call->getBeginLoc());
return true;
}
if (catchBlock->size() < 1)
{
report(DiagnosticsEngine::Warning,
"something wrong with DBG_UNHANDLED_EXCEPTION, CompoundStmt size == 0?",
call->getBeginLoc());
return true;
}
Stmt const* firstStmt = *catchBlock->body_begin();
if (auto exprWithCleanups = dyn_cast<ExprWithCleanups>(firstStmt))
firstStmt = exprWithCleanups->getSubExpr();
if (firstStmt != call)
{
report(DiagnosticsEngine::Warning,
"DBG_UNHANDLED_EXCEPTION must be first statement in catch block",
call->getBeginLoc());
}
return true;
}
static Plugin::Registration<DbgUnhandledException> dbgunhandledexception("dbgunhandledexception");
} // namespace
#endif // LO_CLANG_SHARED_PLUGINS
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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