• Michael Lippautz's avatar
    cppgc: Add GCInfo machinery · 4132d725
    Michael Lippautz authored
    GCInfo and its related infrastructure is used to record information
    about types. Currently, we store finalization and vtable information.
    Future changes will introduce naming and tracing, similar to Oilpan in
    Blink.
    
    Information is stored in a process-wide global table that is
    maintained at runtime. For static builds such information can be
    recorded in the binary without the runtime overhead which is future
    work.
    
    This ports `third_party/blink/renderer/platform/heap/gc_info.{h,cc}`
    on a semantic level. In addition to adjusting to V8's needs, we also
    re-commit the already filled parts of the info table as read-only when
    possible, making it harder to override type information.
    
    Bug: chromium:1056170
    Change-Id: Ib01eb24e6f8a94a4a647efde7af37689f8c20ba2
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2111214
    Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
    Reviewed-by: 's avatarHannes Payer <hpayer@chromium.org>
    Reviewed-by: 's avatarOmer Katz <omerkatz@chromium.org>
    Reviewed-by: 's avatarUlan Degenbaev <ulan@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#66847}
    4132d725
gc-info_unittest.cc 4.81 KB