Changeset 1dafe18 in mainline

Timestamp:

2023-10-22T13:56:55Z (13 months ago)

Author:

Jiří Zárevúcky <zarevucky.jiri@…>

Branches:

master, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

b32cff2a

Parents:

765995a

git-author:

Vojtech Horky <vojtech.horky@…> (2023-07-14 14:24:56)

git-committer:

Jiří Zárevúcky <zarevucky.jiri@…> (2023-10-22 13:56:55)

Message:

C++ lib: prevent use after free (hackish)

File:

• uspace/lib/cpp/src/future.cpp (modified) (1 diff)

uspace/lib/cpp/src/future.cpp

@@ -84 +84 @@
     const char* future_error::what() const noexcept
     {
-        return code().message().c_str();
+        /*
+         * FIXME
+         * Following code would be optimal but the message string is
+         * actually destroyed before the function returns so we would
+         * be returning a dangling pointer. No simple fix available, hence
+         * we use the ugly hack.
+         */
+        //return code().message().c_str();
+#define QUOTE_ARG(arg) #arg
+        return "future_error, see " __FILE__ ":" QUOTE_ARG(__LINE__);
     }
 }