• Dominik Inführ's avatar
    Reland "[heap] Store size with invalidated object" · 23b2d571
    Dominik Inführ authored
    This is a reland of commit 5d235def
    
    The previous version of this CL got reverted because the cached
    size of an invalidated object wasn't up-to-date when performing a GC.
    
    Not all size changes go through NotifyObjectLayoutChange, so
    https://crrev.com/c/3607992 introduced NotifyObjectSizeChange as a
    bottleneck for object size changes/right-trimming. This method is
    now used to update the size of invalidated objects.
    
    Original change's description:
    > [heap] Store size with invalidated object
    >
    > When updating pointers during a full GC, a page might not be swept
    > already. In such cases there might be invalid objects and slots recorded
    > in free memory. Updating tagged slots in free memory is fine even though
    > it is superfluous work.
    >
    > However, the GC also needs to calculate the size of potentially dead
    > invalid objects in order to be able to check whether a slot is within
    > that object. But since that object is dead, its map might be dead as
    > well which makes size calculation impossible on such objects. The CL
    > changes this to cache the size of invalid objects. A follow-up CL will
    > also check the marking bit of invalid objects.
    >
    > Bug: v8:12578, chromium:1316289
    > Change-Id: Ie773d0862a565982957e0dc409630d76552d1a32
    > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3599482
    > Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
    > Reviewed-by: Jakob Linke <jgruber@chromium.org>
    > Reviewed-by: Patrick Thier <pthier@chromium.org>
    > Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
    > Cr-Commit-Position: refs/heads/main@{#80169}
    
    Bug: v8:12578, chromium:1316289
    Change-Id: I1f7c6070b8e7d116aeb1a8d03d4f87927ab40872
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3608632Reviewed-by: 's avatarJakob Linke <jgruber@chromium.org>
    Reviewed-by: 's avatarPatrick Thier <pthier@chromium.org>
    Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
    Reviewed-by: 's avatarMichael Lippautz <mlippautz@chromium.org>
    Cr-Commit-Position: refs/heads/main@{#80262}
    23b2d571
Name
Last commit
Last update
..
arm Loading commit data...
arm64 Loading commit data...
ia32 Loading commit data...
loong64 Loading commit data...
mips Loading commit data...
mips64 Loading commit data...
ppc Loading commit data...
riscv64 Loading commit data...
s390 Loading commit data...
x64 Loading commit data...
DEPS Loading commit data...
DIR_METADATA Loading commit data...
OWNERS Loading commit data...
deoptimize-reason.cc Loading commit data...
deoptimize-reason.h Loading commit data...
deoptimized-frame-info.cc Loading commit data...
deoptimized-frame-info.h Loading commit data...
deoptimizer-cfi-builtins.cc Loading commit data...
deoptimizer-cfi-empty.cc Loading commit data...
deoptimizer.cc Loading commit data...
deoptimizer.h Loading commit data...
frame-description.h Loading commit data...
materialized-object-store.cc Loading commit data...
materialized-object-store.h Loading commit data...
translated-state.cc Loading commit data...
translated-state.h Loading commit data...
translation-array.cc Loading commit data...
translation-array.h Loading commit data...
translation-opcode.h Loading commit data...