Untitled attachment

Notices where this attachment appears

1. Embed this notice
   Jann Horn (jann@infosec.exchange)'s status on Tuesday, 12-Aug-2025 16:10:49 JST Jann Horn

   I landed an LLVM change today that plumbs LLVM's existing !heapallocsite metadata into DWARF: https://github.com/llvm/llvm-project/commit/3f0c180ca07faf536d2ae0d69ec044fcd5a78716

   This associates allocator call sites (in particular calls to C++ new) with DWARF type information; see the corresponding DWARF standard enhancement proposal, which has landed in the DWARF 6 Working Draft, and Microsoft's prior work that this is based on.

   If you have C++ code that allocates heap objects with operator new and use a memory allocator that records the addresses from which it is called, this can be used by debugging/profiling tools to determine the types of heap allocations at runtime.

   (LLVM does not yet support this for C-style malloc() calls yet though.)