The JS API constructor was renamed to "WebAssembly.Tag" to match the
spec:
https://github.com/WebAssembly/exception-handling/issues/159

Rename "exception" to "tag" throughout the codebase for consistency with
the JS API, and to match the spec terminology (e.g. "tag section").

R=clemensb@chromium.org,nicohartmann@chromium.org

Bug: v8:11992
Change-Id: I63f9f3101abfeefd49117461bd59c594ca5dab70
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3053583Reviewed-by: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75994}

- Add d8.file.read() and d8.file.execute() helpers
- Change tools and tests to use new d8.file helper
- Unify error throwing in v8::Shell::ReadFile

Change-Id: I5ef4cb27f217508a367106f01e872a4059d5e399
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2928505
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74883}

This is a more canonical type name, and is in line with {kVoidCode}.

Change-Id: Iaae9524b6fb6ecaafd63ce81cf30e3d01ca3e525
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2775565
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Simon Zünd <szuend@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73557}

'catch_all' and 'else' use distinct opcodes now.

R=clemensb@chromium.org

Bug: v8:8091
Change-Id: If07e46b9ea23068953db1765d10c7e3746d21d99
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2699258
Commit-Queue: Thibaud Michaud <thibaudm@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72810}

Implicitly rethrow the exception when we reach the end of a
try..unwind..end. Also make it a validation error to rethrow
an exception caught by an unwind block.

R=clemensb@chromium.org

Bug: v8:8091
Change-Id: Ia149d2e81b1fbfa9209047b35ff0c9fedc1b8895
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2696662
Commit-Queue: Thibaud Michaud <thibaudm@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72785}

In the latest spec, catch_all is encoded as 0x05. This is the same
opcode as "else", but they do not conflict because "else" is not valid
in the context of a try block.

The 0x0a opcode now corresponds to the "unwind" instruction, which
currently has the same semantics as "catch_all".

R=clemensb@chromium.org

Bug: v8:11392
Change-Id: Ie9cd06c9a2001a02d8bea5be7a3c016e3a58ee3d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2674007
Commit-Queue: Thibaud Michaud <thibaudm@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72531}

First step towards the new exception handling proposal:
https://github.com/WebAssembly/exception-handling/issues/125

This is essentially a revert of:
"[wasm] Switch to new 'catch' and 'br_on_exn' proposal."

The changes are:
- "catch" instruction takes a tag immediate,
- "rethrow" instruction takes a label immediate,
- Add "catch_all" instruction,
- Remove "br_on_exn" instruction,
- Do not push exceptions on the stack, only the encoded values

R=clemensb@chromium.org
CC=​aheejin@chromium.org

Bug: v8:8091
Change-Id: Iea4d8d5a5d3ad50693f645e93c13e8de117aa884
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2484514
Commit-Queue: Thibaud Michaud <thibaudm@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#71602}

Changes:
- Add possibility to define and emit all reference types.
- Simplify function locals definition.
- Change 'type' to 'type_index' where appropiate.

Bug: v8:7748
Change-Id: Ie35a6204369e678298ee2ff2ec7c7793c5315c3e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2390144
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69814}

This brings our constants back in line with the changed spec text. We
already use kExprTableGet and kExprTableSet, but for locals and globals
we still use the old wording.

This renaming is mostly mechanical.

PS1 was created using:
ag -l 'kExpr(Get|Set|Tee)Local' src test | \
  xargs -L1 sed -E 's/kExpr(Get|Set|Tee)Local\b/kExprLocal\1/g' -i

PS2 contains manual fixes.

R=mstarzinger@chromium.org

Bug: v8:9810
Change-Id: I1617f1b2a100685a3bf56218e76845a9481959c5
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1847354Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64161}

We noticed that almost every call site were loading both files,
the split isn't necessary anymore.

In some message tests, removed the absolute line number to allow future
changes.

Bug: v8:8726
Change-Id: I8527f0a1ecfa685aa01a5e2f5f47ddf1cb13a545
Reviewed-on: https://chromium-review.googlesource.com/c/1446452
Commit-Queue: Sven Sauleau <ssauleau@igalia.com>
Reviewed-by: Ben Titzer <titzer@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59220}

This switches the experimental exception handling implementation to the
new proposal where 'catch' blocks behave in a catch-all fashion and a
new 'br_on_exn' operation is used to check for a certain exception type
and extract the exception values on a match.

R=clemensh@chromium.org
TEST=unittests/FunctionBodyDecoderTest,mjsunit/wasm/exceptions
BUG=v8:8091

Change-Id: Ib12ba28b3aa2a7d831312a83abcb00bf56d0adc3
Reviewed-on: https://chromium-review.googlesource.com/c/1409431
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#58832}

R=clemensh@chromium.org

Change-Id: Ie4f40314eb41957c6983796e43eeefe655458160
Reviewed-on: https://chromium-review.googlesource.com/c/1367806
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#58118}

R=titzer@chromium.org
TEST=mjsunit/wasm/exceptions-rethrow,unittests/FunctionBodyDecoderTest
BUG=v8:8091

Change-Id: If52be505fb9897af1bd59d17d1ab47b33b665be0
Reviewed-on: https://chromium-review.googlesource.com/c/1273050
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Ben Titzer <titzer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56563}