deps: cherry-pick 1aead19 from upstream V8

bnoordhuis · MylesBorins · commit 9934dfeb5e26 · 2017-10-03T14:03:11.000-07:00
Original commit message: Add postmortem metadata for thin strings. See: nodejs/llnode#117 Change-Id: Icc2830c8e9096610df33ffdc2f89e74cb1b35662 Reviewed-on: https://chromium-review.googlesource.com/618986 Reviewed-by: Michael Achenbach <machenbach@chromium.org> Commit-Queue: Ben Noordhuis <info@bnoordhuis.nl> Cr-Commit-Position: refs/heads/master@{#47778} Backport-PR-URL: #15393 PR-URL: #15184 Ref: nodejs/llnode#117 Ref: nodejs/llnode#121 Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Michaël Zasso <targos@protonmail.com> Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com> Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de> Reviewed-By: James M Snell <jasnell@gmail.com>
diff --git a/deps/v8/tools/gen-postmortem-metadata.py b/deps/v8/tools/gen-postmortem-metadata.py
@@ -72,6 +72,7 @@
     { 'name': 'ConsStringTag',          'value': 'kConsStringTag' },
     { 'name': 'ExternalStringTag',      'value': 'kExternalStringTag' },
     { 'name': 'SlicedStringTag',        'value': 'kSlicedStringTag' },
+    { 'name': 'ThinStringTag',          'value': 'kThinStringTag' },
 
     { 'name': 'HeapObjectTag',          'value': 'kHeapObjectTag' },
     { 'name': 'HeapObjectTagMask',      'value': 'kHeapObjectTagMask' },
