+void DataFlowSanitizer::addGlobalNamePrefix(GlobalValue *GV) {
+ std::string GVName = GV->getName(), Prefix = "dfs$";
+ GV->setName(Prefix + GVName);
+
+ // Try to change the name of the function in module inline asm. We only do
+ // this for specific asm directives, currently only ".symver", to try to avoid
+ // corrupting asm which happens to contain the symbol name as a substring.
+ // Note that the substitution for .symver assumes that the versioned symbol
+ // also has an instrumented name.
+ std::string Asm = GV->getParent()->getModuleInlineAsm();
+ std::string SearchStr = ".symver " + GVName + ",";
+ size_t Pos = Asm.find(SearchStr);
+ if (Pos != std::string::npos) {
+ Asm.replace(Pos, SearchStr.size(),
+ ".symver " + Prefix + GVName + "," + Prefix);
+ GV->getParent()->setModuleInlineAsm(Asm);
+ }
+}
+