deps: cherry-pick 804a693 from upstream V8

Original commit message: [postmortem] add JS_ERROR_TYPE and context embedder index * JS_ERROR_TYPE is required for postmortem tools to inspect JSError objects (see nodejs/llnode#215 for a usage example) * The context embedder index is required for postmortem tools to access embedder data stored in the context (see nodejs/llnode#204 for a usage example) R=bmeurer@google.com, yangguo@google.com Change-Id: Ib7c7eb44f6ad327fc71a1d45f510c49377db7a25 Reviewed-on: https://chromium-review.googlesource.com/1138493 Reviewed-by: Benedikt Meurer <bmeurer@chromium.org> Commit-Queue: Benedikt Meurer <bmeurer@chromium.org> Cr-Commit-Position: refs/heads/master@{#54475} Refs: v8/v8@804a693 PR-URL: #21855 Reviewed-By: Michaël Zasso <targos@protonmail.com> Reviewed-By: Gus Caplan <me@gus.host> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Richard Lau <riclau@uk.ibm.com> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Yang Guo <yangguo@chromium.org>
nodejs · psmarshall · Jul 25, 2018 · Jul 25, 2018 · Apr 19, 2018 · Jun 18, 2018
commit ef45ada19f2a25d26b7e3181fdf9b99cddc8648f
diff --git a/common.gypi b/common.gypi
@@ -28,7 +28,7 @@
 
     # Reset this number to 0 on major V8 upgrades.
     # Increment by one for each non-official patch applied to deps/v8.
-    'v8_embedder_string': '-node.11',
+    'v8_embedder_string': '-node.12',
 
     # Enable disassembler for `--print-code` v8 options
     'v8_enable_disassembler': 1,

diff --git a/deps/v8/tools/gen-postmortem-metadata.py b/deps/v8/tools/gen-postmortem-metadata.py
@@ -211,6 +211,9 @@
         'value': 'Context::EXTENSION_INDEX' },
     { 'name': 'context_min_slots',
         'value': 'Context::MIN_CONTEXT_SLOTS' },
+    { 'name': 'context_idx_embedder_data',
+        'value': 'Internals::kContextEmbedderDataIndex' },
+
 
     { 'name': 'namedictionaryshape_prefix_size',
         'value': 'NameDictionaryShape::kPrefixSize' },
@@ -231,6 +234,8 @@
         'value': 'SimpleNumberDictionaryShape::kPrefixSize' },
     { 'name': 'simplenumberdictionaryshape_entry_size',
         'value': 'SimpleNumberDictionaryShape::kEntrySize' },
+
+    { 'name': 'type_JSError__JS_ERROR_TYPE', 'value': 'JS_ERROR_TYPE' },
 ];
 
 #