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4 Commits
Author SHA1 Message Date
Kevin Babbitt 7622afda36 cppgc: Add a compile-time flag to enable larger cages 
This CL introduces gn flag cppgc_enable_larger_cage and corresponding
When this flag is enabled, the caged heap can grow up to 16GB.

Testing: The test I would have written for this CL is to validate that
pointer compression and decompression work correctly under 3-bit shift,
which is already covered by MemberTest.CompressDecompress. I ran the
MemberTest unit tests locally with the flag enabled and confirmed that
they pass. I also ran a full CQ dry run with the flag enabled here:
https://chromium-review.googlesource.com/c/v8/v8/+/4491403

Bug: chromium:1434388
Change-Id: I7fb07c84f3a408add2a67b875acb513906b3e18c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/4491284
Reviewed-by: Anton Bikineev <bikineev@chromium.org>
Commit-Queue: Kevin Babbitt <kbabbitt@microsoft.com>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#87419}
 2023-05-03 16:11:24 +00:00
Anton Bikineev 2c40f3af4f cppgc: Speed up pointer decompression 
With this CL, the decompression simply becomes:
       movsxd  rax, edi
       add     rax, rax
       and     rax, qword ptr fs:[base@TPOFF]

Bug: chromium:1325007

Change-Id: I931e4e667a9b9697671bccf14575420f8cb705e8
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3629871
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Anton Bikineev <bikineev@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80521}
 2022-05-13 12:38:43 +00:00
Clemens Backes a7a0ff10af [cleanup][include] Remove redundant NOLINT annotations 
cpplint rules change over time, and we change the exact rules we enable
for v8. This CL removes NOLINT annotations which are not needed
according to the currently enabled rules.

R=mlippautz@chromium.org

Bug: v8:11717
Change-Id: I41c4c18dd3f70ec255e9d2769ffd25a38f6f2784
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2862764
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74307}
 2021-04-30 16:22:19 +00:00
Michael Lippautz 65893d84e5 cppgc: Fix low-level write barriers 
Some types of supported low-level write barrier only requires passing
a slot, which may not be even part of a heap object but stack.

This complicates the situation, as even with caged heap, there's no
way to distinguish a stack and heap slot.

Solve this by passing an optional callback that can lazy be used to
get the heap. This can be used by the embedder to retrieve the heap
from e.g. TLS if needed.  This aligns the barrier with Oilpan in
Blink.

Bug: chromium:1056170
Change-Id: I1e5d022ab17a2614a67b6ef39ed12691bcbd0ac6
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2675924
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72550}
 2021-02-05 15:22:04 +00:00