/** Makes a CFG edge, adding appropriate labels. */
void makeEdge(SgAsmInstruction* from, SgAsmInstruction* to, const AuxiliaryInformation* info, vector<CFGEdge>& result) {
#if 0
SgAsmNode* fromNode = from.getNode();
unsigned int fromIndex = from.getIndex();
SgAsmNode* toNode = to.getNode();
unsigned int toIndex = to.getIndex();
#if 0
// Exit early if the edge should not exist because of a control flow discontinuity
if (fromIndex == 1 && (isSgGotoStatement(fromNode) || isSgBreakStmt(fromNode) || isSgContinueStmt(fromNode))) {
return;
}
if (isSgReturnStmt(fromNode) && toNode == fromNode->get_parent()) {
SgReturnStmt* rs = isSgReturnStmt(fromNode);
if (fromIndex == 1 || fromIndex == 0 && !rs->get_expression()) return;
}
if (fromIndex == 1 && isSgSwitchStatement(fromNode) &&
isSgSwitchStatement(fromNode)->get_body() == toNode) return;
#endif
#endif
// Create the edge
result.push_back(CFGEdge(CFGNode(from, info), CFGNode(to, info), info));
}
void instr(SgGlobal* global) {
// Create the lock and key variables in global scope.
// In main:
// EnterScope();
// lock = getTopLock();
// key = getTopKey();
// .... rest of main
// ExitScope();
// return;
// FIXME: Add case where we handle arbitrary exits from main
// This can be handled similar to the way returns are handled
// for basic blocks.
SgScopeStatement* scope = isSgScopeStatement(global);
// Insert lock and key variables at the top of the global scope
// lock variable
std::cout << "VarCounter: " << Util::VarCounter << std::endl;
SgName lock_name("lock_var" + boost::lexical_cast<std::string>(Util::VarCounter));
SgVariableDeclaration* lock_var = Util::createLocalVariable(lock_name, getLockType(), NULL, scope);
// Add declaration at the top of the scope
scope->prepend_statement(lock_var);
// key variable
// **** IMPORTANT: Using same counter value for lock and key
SgName key_name("key_var" + boost::lexical_cast<std::string>(Util::VarCounter));
Util::VarCounter++;
SgVariableDeclaration* key_var = Util::createLocalVariable(key_name, getKeyType(), NULL, scope);
// Insert this key decl after the lock decl
SI::insertStatementAfter(lock_var, key_var);
// Now, find the main function and insert...
// EnterScope();
// lock = getTopLock();
// key = getTopKey();
// .... rest of main
// ExitScope()
// return; -- this already exists...
// see FIXME above
// find main function...
SgFunctionDeclaration* MainFn = SI::findMain(global);
if(!MainFn) {
#ifdef HANDLE_GLOBAL_SCOPE_DEBUG
printf("Can't find Main function. Not inserting Global Enter and Exit Scopes\n");
#endif
return;
}
SgBasicBlock *bb = Util::getBBForFn(MainFn);
// insert EnterScope()
#if 0
SgExpression* overload = buildOverloadFn("EnterScope", NULL, NULL, SgTypeVoid::createType(), scope,
GEFD(bb));
#endif
SgExpression* overload = buildMultArgOverloadFn("EnterScope", SB::buildExprListExp(), SgTypeVoid::createType(), scope,
GEFD(bb));
SgStatement* enter_scope = SB::buildExprStatement(overload);
Util::insertAtTopOfBB(bb, enter_scope);
// insert lock = getTopLock();
//overload = buildOverloadFn("getTopLock", NULL, NULL, getLockType(), scope, GEFD(bb));
overload = buildMultArgOverloadFn("getTopLock", SB::buildExprListExp(), getLockType(), scope, GEFD(bb));
//SgStatement* lock_assign = SB::buildExprStatement(SB::buildAssignOp(SB::buildVarRefExp(lock_var), overload));
//SI::insertStatementAfter(enter_scope, lock_assign); //RMM COMMENTED OUT
// insert key = getTopKey();
// overload = buildOverloadFn("getTopKey", NULL, NULL, getKeyType(), scope, GEFD(bb));
overload = buildMultArgOverloadFn("getTopKey", SB::buildExprListExp(), getKeyType(), scope, GEFD(bb));
//SgStatement* key_assign = SB::buildExprStatement(SB::buildAssignOp(SB::buildVarRefExp(key_var), overload));
//SI::insertStatementAfter(lock_assign, key_assign); //RMM COMMENTED OUT
// add to scope -> lock and key map... SLKM
LockKeyPair lock_key = std::make_pair(lock_var, key_var);
scopeLockMap[scope] = lock_key;
ROSE_ASSERT(existsInSLKM(scope));
// Insert ExitScope if last stmt is not return.
SgStatementPtrList& stmts = bb->get_statements();
SgStatementPtrList::iterator it = stmts.begin();
it += (stmts.size() - 1);
// A little iffy on the scope part here... lets check that.
if(!isSgReturnStmt(*it)) {
// Last statement is not return. So, add exit scope...
// If its a break/continue statement, insert statement before,
// otherwise, add exit_scope afterwards.
//SgExpression* overload = buildOverloadFn("ExitScope", NULL, NULL, SgTypeVoid::createType(), scope, GEFD(bb));
SgExpression* overload = buildMultArgOverloadFn("ExitScope", SB::buildExprListExp(), SgTypeVoid::createType(), scope, GEFD(bb));
// check if its break/continue
if(isSgBreakStmt(*it) || isSgContinueStmt(*it)) {
SI::insertStatementBefore(*it, SB::buildExprStatement(overload));
}
else {
SI::insertStatementAfter(*it, SB::buildExprStatement(overload));
}
}
}
void instr(SgBasicBlock* bb) {
// 1. Add Enter Scope -- This will be removed when RTED ScopeGuard is used
// 2. Insert lock and key variables at the top of stack.
// 3. Create a map for lock and key with each scope
// 4. Insert ExitScope statement if the last statement in the list isn't
// a return stmt. Return stmts are handled in handleReturnStmts
SgScopeStatement* scope = isSgScopeStatement(bb);
// 1. Add Enter Scope
#if 0
SgExpression* overload = buildOverloadFn("EnterScope", NULL, NULL, SgTypeVoid::createType(), scope,
GEFD(bb));
#endif
SgExpression* overload = buildMultArgOverloadFn("EnterScope", SB::buildExprListExp(), SgTypeVoid::createType(), scope,
GEFD(bb));
SgStatement* enter_scope = SB::buildExprStatement(overload);
Util::insertAtTopOfBB(bb, enter_scope);
// 2. Insert lock and key variables
// lock calls "getTopLock"
// key calls "getTopKey"
#if 0
overload = buildOverloadFn("getTopLock", NULL, NULL, getLockType(), scope,
GEFD(bb));
#endif
overload = buildMultArgOverloadFn("getTopLock", SB::buildExprListExp(), getLockType(), scope,
GEFD(bb));
// **** IMPORTANT: Using same counter value for lock and key
SgName lock_name("lock_var" + boost::lexical_cast<std::string>(Util::VarCounter));
//SgVariableDeclaration* lock_var = Util::createLocalVariable(lock_name, getLockType(), overload, scope);
// Insert this lock declaration after the EnterScope
//SI::insertStatementAfter(enter_scope, lock_var); //RMM COMMENTED OUT
// For the key...
#if 0
overload = buildOverloadFn("getTopKey", NULL, NULL, getKeyType(), scope,
GEFD(bb));
#endif
overload = buildMultArgOverloadFn("getTopKey", SB::buildExprListExp(), getKeyType(), scope,
GEFD(bb));
// **** IMPORTANT: Using same counter value for lock and key
SgName key_name("key_var" + boost::lexical_cast<std::string>(Util::VarCounter++));
//SgVariableDeclaration* key_var = Util::createLocalVariable(key_name, getKeyType(), overload, scope);
// Insert this key decl after the lock decl
//SI::insertStatementAfter(lock_var, key_var); //RMM COMMENTED OUT
// Add to scope -> lock and key map
//LockKeyPair lock_key = std::make_pair(lock_var, key_var);
//SLKM[scope] = lock_key;
//ROSE_ASSERT(existsInSLKM(scope));
// 4. Insert ExitScope if last stmt is not return.
SgStatementPtrList& stmts = bb->get_statements();
SgStatementPtrList::iterator it = stmts.begin();
it += (stmts.size() - 1);
if(!isSgReturnStmt(*it)) {
// Last statement is not return. So, add exit scope...
// If its a break/continue statement, insert statement before,
// otherwise, add exit_scope afterwards.
//SgExpression* overload = buildOverloadFn("ExitScope", NULL, NULL, SgTypeVoid::createType(), scope, GEFD(bb));
SgExpression* overload = buildMultArgOverloadFn("ExitScope", SB::buildExprListExp(), SgTypeVoid::createType(), scope, GEFD(bb));
// check if its break/continue
if(isSgBreakStmt(*it) || isSgContinueStmt(*it)) {
SI::insertStatementBefore(*it, SB::buildExprStatement(overload));
}
else {
SI::insertStatementAfter(*it, SB::buildExprStatement(overload));
}
}
return;
}