[Lldb-commits] [PATCH] D47418: Fix memory leak in SubsPrimitiveParmItanium

Raphael Isemann via Phabricator via lldb-commits lldb-commits at lists.llvm.org
Sun May 27 00:33:04 PDT 2018

teemperor created this revision.
Herald added a reviewer: javed.absar.
Herald added subscribers: chrib, kristof.beyls.

FastDemangle gives us a C-string that we own (which is allocated in SymbolDemangler::GetDemangledCopy).
As we are not deleting the string, we leak memory whenever we call SubsPrimitiveParmItanium.



Index: source/Plugins/Language/CPlusPlus/CPlusPlusLanguage.cpp
--- source/Plugins/Language/CPlusPlus/CPlusPlusLanguage.cpp
+++ source/Plugins/Language/CPlusPlus/CPlusPlusLanguage.cpp
@@ -309,13 +309,15 @@
   // FastDemangle will call our hook for each instance of a primitive type,
   // allowing us to perform substitution
-  const char *const demangled =
+  char *const demangled =
       FastDemangle(mangled.str().c_str(), mangled.size(), swap_parms_hook);
   if (log)
     log->Printf("substituted mangling for %s:{%s} %s:{%s}\n",
                 mangled.str().c_str(), demangled, output_buf.c_str(),
+  // FastDemangle malloc'd this string.
+  free(demangled);
   return output_buf == mangled ? ConstString() : ConstString(output_buf);

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