Reland "[build] Make separate snapshot for trusted variant"
This is a reland of 40d66d8b The fix disambiguates duplicate symbols in the generated embedded builtins file. Original change's description: > [build] Make separate snapshot for trusted variant > > This enables side-by-side snapshots with and without untrusted-code > mitigations. It'll be the default in all V8 stand-alone builds > with external startup data. Internal snapshots are not supported. > > The files snapshot_blob.bin and snapshot_blob_trusted.bin will be > bundled with V8 on swarming and the correct file is loaded dependent > on the --untrusted-code-mitigations runtime flag. > > Likewise we embed two snapshots for builtins. > > Side-by-side snapshots won't be supported in Chromium. > > Bug: v8:7441 > Change-Id: I2949ddfd5773649946b1c8e74751d48ad1d9c524 > Reviewed-on: https://chromium-review.googlesource.com/960004 > Commit-Queue: Michael Achenbach <machenbach@chromium.org> > Reviewed-by: Jakob Gruber <jgruber@chromium.org> > Reviewed-by: Yang Guo <yangguo@chromium.org> > Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> > Cr-Commit-Position: refs/heads/master@{#52028} Bug: v8:7441 Change-Id: I626171d4e07389f0453b4d0a698e2772fd37e8c5 Reviewed-on: https://chromium-review.googlesource.com/968623 Commit-Queue: Michael Achenbach <machenbach@chromium.org> Reviewed-by: Jakob Gruber <jgruber@chromium.org> Cr-Commit-Position: refs/heads/master@{#52055}
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