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-rw-r--r--clang/lib/StaticAnalyzer/Checkers/IntervalTest.cpp102
1 files changed, 101 insertions, 1 deletions
diff --git a/clang/lib/StaticAnalyzer/Checkers/IntervalTest.cpp b/clang/lib/StaticAnalyzer/Checkers/IntervalTest.cpp
index badb671..c1e0273 100644
--- a/clang/lib/StaticAnalyzer/Checkers/IntervalTest.cpp
+++ b/clang/lib/StaticAnalyzer/Checkers/IntervalTest.cpp
@@ -7,6 +7,15 @@
using namespace clang;
using namespace ento;
+using namespace std;
+
+#include <sstream>
+template<typename T>
+string toString(const T& obj) {
+ stringstream stream;
+ stream << obj;
+ return stream.str();
+}
namespace {
class IntervalTest: public Checker<check::ASTCodeBody> {
@@ -14,7 +23,98 @@ public:
void checkASTCodeBody(const Decl *D, AnalysisManager& mgr,
BugReporter &BR) const {
if (IntervalAnalysis *a = mgr.getAnalysis<IntervalAnalysis>(D)) {
- a->runOnAllBlocks(*D);
+ CFG* cfg = mgr.getCFG(D);
+
+ set<string> variables;
+
+ if (const FunctionDecl* func = dyn_cast<const FunctionDecl>(D)) {
+ for (unsigned int i = func->getNumParams(); i > 0; i--) {
+ variables.insert(func->getParamDecl(i-1)->getNameAsString());
+ }
+ }
+ for (CFG::iterator
+ it = cfg->begin(),
+ ei = cfg->end();
+ it != ei;
+ ++it) {
+ for (CFGBlock::iterator
+ block_it = (*it)->begin(),
+ block_end = (*it)->end();
+ block_it != block_end;
+ block_it++) {
+ const CFGStmt* cfg_stmt = block_it->getAs<CFGStmt>();
+ const Stmt* stmt = cfg_stmt->getStmt();
+ if (stmt->getStmtClass() == Stmt::BinaryOperatorClass) {
+ const BinaryOperator* binop = static_cast<const BinaryOperator*>(stmt);
+ if (binop->isAssignmentOp()) {
+ const Expr* left = binop->getLHS()->IgnoreParenCasts();
+ if (left->getStmtClass() == Stmt::DeclRefExprClass) {
+ variables.insert(static_cast<const DeclRefExpr*>(left)->getNameInfo().getAsString());
+ }
+ }
+ } else if (stmt->getStmtClass() == Stmt::DeclStmtClass) {
+ const DeclStmt* decl_stmt = static_cast<const DeclStmt*>(stmt);
+ for (DeclStmt::const_decl_iterator jt = decl_stmt->decl_begin(),
+ ej = decl_stmt->decl_end();
+ jt != ej;
+ ++jt) {
+ if ((*jt)->getKind() == Decl::Var) {
+ const VarDecl* decl = static_cast<const VarDecl*>(*jt);
+ variables.insert(decl->getNameAsString());
+ jt++;
+ if (jt != ej) {
+ llvm::errs() << "Only the first declaration in a multi-declaration statement is used.\n";
+ }
+ break; // only take the first one, for now
+ }
+ }
+ }
+ }
+ }
+
+
+
+ vector<string> labels;
+ ConstraintMatrix T;
+ set<string>::iterator end = variables.end();
+ for (set<string>::iterator it = variables.begin();
+ it != end;
+ ++it) {
+ map<string,int> pos_row;
+ pos_row[*it] = 1;
+ T.push_back(pos_row);
+ labels.push_back(*it);
+
+ map<string,int> neg_row;
+ neg_row[*it] = -1;
+ T.push_back(neg_row);
+ labels.push_back("-" + *it);
+
+ for (set<string>::iterator jt = variables.begin();
+ jt != end;
+ ++jt) {
+ if (it != jt) {
+ map<string,int> diff_row;
+ diff_row[*it] = 1;
+ diff_row[*jt] = -1;
+ T.push_back(diff_row);
+ labels.push_back(*it + " - " + *jt);
+ }
+ }
+ }
+
+ map<CFGBlock*,vector<ZBar> > result = a->runOnAllBlocks(*D, T);
+
+ for (map<CFGBlock*,vector<ZBar> >::iterator
+ it = result.begin(),
+ ei = result.end();
+ it != ei;
+ ++it) {
+ llvm::errs() << "Block " << toString(it->first->getBlockID()) << ": \n";
+ for (unsigned int i = 0; i < T.size(); ++i) {
+ llvm::errs() << "\t" << labels[i] << " <= " << toString(it->second[i]) << "\n";
+ }
+ }
}
}
};