| commit | db13e671e17c070192a37e916fa394012f0038e2 | [log] [tgz] |
|---|---|---|
| author | Michael LeMay <michael.lemay@intel.com> | Thu Dec 01 03:21:52 2022 |
| committer | Copybara-Service <copybara-worker@google.com> | Thu Dec 01 03:28:02 2022 |
| tree | 95175c47ee4009bc072b115e4777f8ccafb2b7ad | |
| parent | 140bed141bdb9192c2b63d424291e9257606bcaf [diff] |
Poison end-of-allocation BackupRefPtrs Extend BackupRefPtr to poison pointers that have overflowed by one byte. Attempting to dereference a poisoned pointer will generate an exception when this feature is enabled. This feature is behind a buildflag to allow checking its performance impact. Co-authored-by: Bartek Nowierski <bartekn@chromium.org> Change-Id: I619d4b775678e5f88bf685c9b1bf6a34b67a4b5b Bug: 1073933 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2738677 Reviewed-by: Bartek Nowierski <bartekn@chromium.org> Commit-Queue: Bartek Nowierski <bartekn@chromium.org> Cr-Commit-Position: refs/heads/main@{#1077842} NOKEYCHECK=True GitOrigin-RevId: 23c78e78e9146b372186bea3293e89f316bcece5
This directory is used to allow different products to customize settings for repos that are DEPS'ed in or shared.
For example: V8 could be built on its own (in a “standalone” configuration), and it could be built as part of Chromium. V8 might define a top-level target, //v8:d8 (a simple executable), that should only be built in the standalone configuration. To figure out whether or not it should be in a standalone configuration, v8 can create a file, build_overrides/v8.gni, that contains a variable, build_standalone_d8 = true. and import it (as import(“//build_overrides/v8.gni”) from its top-level BUILD.gn file.
Chromium, on the other hand, might not need to build d8, and so it would create its own build_overrides/v8.gni file, and in it set build_standalone_d8 = false.
The two files should define the same set of variables, but the values can vary as appropriate to the needs of the two different builds.
The build.gni file provides a way for projects to override defaults for variables used in //build itself (which we want to be shareable between projects).
TODO(crbug.com/588513): Ideally //build_overrides and, in particular, //build_overrides/build.gni should go away completely in favor of some mechanism that can re-use other required files like //.gn, so that we don't have to keep requiring projects to create a bunch of different files to use GN.