It's been enabled by default since Chromium M95.
Also removes duplicate setup code for WebAssembly.Tag JS API
from WasmJs::InstallConditionalFeatures, since we're guaranteed
to set it up via the non-conditional WasmJs::Install.
Bug: v8:8091
Change-Id: Ic500feb655ad4fc0703ed226504847ca6d940537
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3996810
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/main@{#84074}
Also introduce a separate error type for WebAssembly.Exception,
since the properties should not be added to RuntimeError.
R=jkummerow@chromium.org
Bug: v8:11992
Change-Id: I8f4ae0da9a95184366e07dc43e58a5a9ff4382ae
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3055304
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Thibaud Michaud <thibaudm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#76061}
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/+/3053583
Reviewed-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}
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}
When dropping the exception from the stack, we have to
take locals into account when computing the right stack
slot.
Fixed: chromium:1187836
Change-Id: I76acb1e4dc50992524123cc369dea8e51242164c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2764749
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73469}
Push the caught exception on the value stack, so that we can access it
from an inner catch block and rethrow it.
R=clemensb@chromium.org
Bug: v8:11453
Change-Id: Ibc5e653a07c3e4436e252c001b53bc2d3402abc9
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2739974
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Thibaud Michaud <thibaudm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73295}
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}
The delegate instruction is invalid in the following cases:
- When the target is not a try block or the function block,
- When the instruction is inside a catch handler of the target.
R=clemensb@chromium.org
Bug: v8:8091
Change-Id: Ic59e8314982166863ba2078e2b3b39e3ba488a74
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2656318
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Thibaud Michaud <thibaudm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72428}
Exception ref is not part of the latest exception handling
proposal. Remove the corresponding value type, the type opcode and some
obsolete tests.
R=clemensb@chromium.org
Bug: v8:8091
Change-Id: I5e068ba3426f4b56b90ef056193acdd8cc8fe7d7
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2632599
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Thibaud Michaud <thibaudm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72116}
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}
This adds a test which I suspected would fail, but luckily it doesn't.
The idea is to catch a proper wasm exception in JS, then construct a new
exception, but set the catched exception as the prototype. My suspicion
was that we would still handle that new exception like a wasm exception,
since the `WasmExceptionGetTag` and `WasmExceptionGetValues` runtime
functions to a standard property lookup, which includes a prototype
walk.
Interestingly, the prototype walk is already skipped automatically when
loading private symbols, so the implementation already supports this
case correctly.
Let's still add this test to have coverage for this case.
R=jkummerow@chromium.orgCC=aheejin@chromium.org
Bug: v8:8091
Change-Id: Idf9944cf47f96cca38e9678e9200bf03a39ea126
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2167438
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67391}
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/+/1847354
Reviewed-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}
This adds support for multiple catch blocks being attached to a single
try block. The implemented semantics are that type checks are performed
in order from top to bottom.
Note that multiple catch blocks of the same type are not prohibited and
will be accepted, making the second such block essentially unreachable.
The current proposal neither explicitly allows nor prohibits it.
R=clemensh@chromium.org
TEST=mjsunit/wasm/exceptions
BUG=v8:8091
Change-Id: I31e7a07a7cffdd909a58342e00f05e52ed1a3182
Reviewed-on: https://chromium-review.googlesource.com/c/1270591
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56478}
This adds support to wire control flow of catch-all expressions into an
existing try-catch cascade. Note that multiple typed catch blocks are
not yet supported, only one typed catch block followed by one catch-all
block is supported.
In case the explicit catch-all block is missing, we emulate the correct
semantics by internally always emitting a catch-all containing a simple
rethrow instruction.
R=clemensh@chromium.org
TEST=mjsunit/wasm/exceptions-catchall
BUG=v8:8091
Change-Id: I6b29a98c4f1a558fabe6012f4ba6c7b7d43529bb
Reviewed-on: https://chromium-review.googlesource.com/c/1270585
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56476}
This is a reland of a4105a437d
Original change's description:
> [wasm] Implement handling of exported/imported exceptions.
>
> This implements the proper semantics for matching exported/imported
> exceptions by using the notion of an "exception tag" that is global to
> the system. It can be used to match exceptions in one module against
> exceptions declared and/or thrown in another module (or instance).
>
> R=clemensh@chromium.org
> TEST=mjsunit/wasm/exceptions-shared
> BUG=v8:8091
>
> Change-Id: I37586d7be5d5e6169b3418dfbc415b26dd4750dd
> Reviewed-on: https://chromium-review.googlesource.com/1226976
> Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
> Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#55940}
Bug: v8:8091
Change-Id: Ib85f099b26a8323a8a00299b5aaeb05aaff3c3c6
Reviewed-on: https://chromium-review.googlesource.com/1227975
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55959}
This reverts commit a4105a437d.
Reason for revert: GC stress failures (https://ci.chromium.org/p/v8/builders/luci.v8.ci/V8%20Mac64%20GC%20Stress/3097)
Original change's description:
> [wasm] Implement handling of exported/imported exceptions.
>
> This implements the proper semantics for matching exported/imported
> exceptions by using the notion of an "exception tag" that is global to
> the system. It can be used to match exceptions in one module against
> exceptions declared and/or thrown in another module (or instance).
>
> R=clemensh@chromium.org
> TEST=mjsunit/wasm/exceptions-shared
> BUG=v8:8091
>
> Change-Id: I37586d7be5d5e6169b3418dfbc415b26dd4750dd
> Reviewed-on: https://chromium-review.googlesource.com/1226976
> Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
> Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#55940}
TBR=mstarzinger@chromium.org,clemensh@chromium.org
Change-Id: I5ef19ea3b67f470f2d7807810110d75415ba9ed6
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:8091
Reviewed-on: https://chromium-review.googlesource.com/1227933
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55942}
This implements the proper semantics for matching exported/imported
exceptions by using the notion of an "exception tag" that is global to
the system. It can be used to match exceptions in one module against
exceptions declared and/or thrown in another module (or instance).
R=clemensh@chromium.org
TEST=mjsunit/wasm/exceptions-shared
BUG=v8:8091
Change-Id: I37586d7be5d5e6169b3418dfbc415b26dd4750dd
Reviewed-on: https://chromium-review.googlesource.com/1226976
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55940}
This fixes an off-by-one in the ordering restriction check for exception
sections in a module. It also adds proper testing for exception handling
of indirect calls. This in turn adds a table section that triggers the
aforementioned bug.
R=clemensh@chromium.org
TEST=mjsunit/wasm/exceptions,unittests/WasmModuleVerifyTest
BUG=v8:8091
Change-Id: Ie44ad4dee1b0c623f069fca7661c4282492b52d6
Reviewed-on: https://chromium-review.googlesource.com/1203993
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55615}
This fixes exception creation (by the WebAssembly throw operation) so
that it is not observable by JavaScript. Internal properties are now
stored with symbol names instead of string names, which also prevents
them from being accessed or monkey-patched directly by JavaScript.
R=clemensh@chromium.org
TEST=mjsunit/regress/wasm/regress-8094
BUG=v8:8094
Change-Id: I33cb27f4373114cd4db28d9aef23560093e55242
Reviewed-on: https://chromium-review.googlesource.com/1203951
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55602}
This adds experimental support for an 'except_ref' value type for caught
exceptions as per the exception handling proposal. In the current for it
is only allowed to have such types in the stack or in a local, support
for having it as part of any signature was left out.
The default value for a local of type 'except_ref' is the 'ref_null'
value for now. Since this value cannot escape a wasm function, the
concrete value is not actually observable.
R=ahaas@chromium.org
TEST=unittests/LocalDeclDecoderTest.ExceptRef,mjsunit/wasm/exceptions
BUG=v8:8091
Change-Id: I7bd65274327a833262f8749cbe0e24e737f6e0c1
Reviewed-on: https://chromium-review.googlesource.com/1196510
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55526}
This makes sure that direct and indirect calls get proper {IfException}
projections attached to them if they appear within a try-block. It also
re-enables most of the corresponding test cases for this.
R=ahaas@chromium.org
TEST=mjsunit/wasm/exceptions
BUG=v8:8091
Change-Id: I111634759651ed47f76850e80c8754751310001b
Reviewed-on: https://chromium-review.googlesource.com/1195365
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55483}
This is a second attempt at landing CL 644866 which was reverted by
CL 667019.
Extends the current implementation of WASM exceptions to be able to
throw exceptions with values (not just tags).
A JS typed (uint_16) array is used to hold the thrown values. This
allows all WASM types to be stored (i32, i64, f32, and f64) as well as
be inspected in JS.
The previous CL was reverted because the WASM compiler made calls to
run time functions with tagged objects, which must not be done. To fix
this, all run time calls use the thread-level isolate to hold the
exception being processed.
Bug: v8:6577
Change-Id: I4b1ef7e2847b71a2fab8e9934a0531057db9de63
Reviewed-on: https://chromium-review.googlesource.com/677056
Commit-Queue: Karl Schimpf <kschimpf@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Eric Holk <eholk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48148}
This reverts commit 7b5a40222e.
Reason for revert: GC stress-test failures exposed by 7742e534a8https://build.chromium.org/p/client.v8/builders/V8%20Linux64%20GC%20Stress%20-%20custom%20snapshot/builds/15110/steps/Mjsunit/logs/exceptions
Original change's description:
> Add capability of throwing values in WASM
>
> Extends the current implementation of WASM exceptions to be able to
> throw exceptions with values (not just tags).
>
> An JS typed array (uint_16) is used to hold thrown values, so that the
> thrown values can be inspected in JS.
>
> Bug: v8:6577
> Change-Id: I1007e79ceaffd64386b62562919cfbb920fc10c5
> Reviewed-on: https://chromium-review.googlesource.com/633866
> Commit-Queue: Karl Schimpf <kschimpf@chromium.org>
> Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
> Reviewed-by: Eric Holk <eholk@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#48001}
TBR=bbudge@chromium.org,mtrofin@chromium.org,eholk@chromium.org,clemensh@chromium.org,kschimpf@chromium.org
# Not skipping CQ checks because original CL landed > 1 day ago.
Bug: v8:6577
Change-Id: I8f545183c2d2abb1bf4a0b3ee23379f3754ffd55
Reviewed-on: https://chromium-review.googlesource.com/667019
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Mircea Trofin <mtrofin@chromium.org>
Commit-Queue: Bill Budge <bbudge@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48050}
Extends the current implementation of WASM exceptions to be able to
throw exceptions with values (not just tags).
An JS typed array (uint_16) is used to hold thrown values, so that the
thrown values can be inspected in JS.
Bug: v8:6577
Change-Id: I1007e79ceaffd64386b62562919cfbb920fc10c5
Reviewed-on: https://chromium-review.googlesource.com/633866
Commit-Queue: Karl Schimpf <kschimpf@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Eric Holk <eholk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48001}
This reimplements functionality that was present before the decoder
refactoring. It's implemented a bit differently though by generating
the code for re-throwing an uncaught exception earlier (when generating
code for the catch).
R=titzer@chromium.org, kschimpf@chromium.org
Bug: v8:6600
Change-Id: Ie2f11837851c0602ab31506fa63475fc2d0b5047
Reviewed-on: https://chromium-review.googlesource.com/641550
Commit-Queue: Brad Nelson <bradnelson@chromium.org>
Reviewed-by: Brad Nelson <bradnelson@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47687}
This is a reland of 6b4dc039a6
Original change's description:
> [wasm] Refactor function body decoder
>
> This refactoring separates graph building from wasm decoding. The
> WasmGraphBuilder is just a consumer of the decoded information.
> Decoding without any consumer (i.e. just validation) gets 16% faster by
> this refactoring, because no TFNode* have to be stored in the value
> stack, and all dynamic tests to determine whether the graph should be
> build are gone (measured on AngryBots; before: 110.2 +- 3.3ms, after:
> 92.2 +- 3.1 ms).
>
> This new design will allow us to also attach other consumers, e.g. a
> new baseline compiler.
>
> R=titzer@chromium.org
>
> Bug: v8:6600
> Change-Id: I4b60f2409d871a16c3c52a37e515bcfb9dbb8f54
> Reviewed-on: https://chromium-review.googlesource.com/571010
> Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
> Reviewed-by: Ben Titzer <titzer@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#47671}
TBR=titzer@chromium.org
Bug: v8:6600
Change-Id: Idd867c5a1917437de5b6e3de5917cc1c9f194489
Reviewed-on: https://chromium-review.googlesource.com/640591
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47678}
This reverts commit 6b4dc039a6.
Reason for revert: Mips build failure: https://build.chromium.org/p/client.v8.ports/builders/V8%20Mips%20-%20builder/builds/11749
Original change's description:
> [wasm] Refactor function body decoder
>
> This refactoring separates graph building from wasm decoding. The
> WasmGraphBuilder is just a consumer of the decoded information.
> Decoding without any consumer (i.e. just validation) gets 16% faster by
> this refactoring, because no TFNode* have to be stored in the value
> stack, and all dynamic tests to determine whether the graph should be
> build are gone (measured on AngryBots; before: 110.2 +- 3.3ms, after:
> 92.2 +- 3.1 ms).
>
> This new design will allow us to also attach other consumers, e.g. a
> new baseline compiler.
>
> R=titzer@chromium.org
>
> Bug: v8:6600
> Change-Id: I4b60f2409d871a16c3c52a37e515bcfb9dbb8f54
> Reviewed-on: https://chromium-review.googlesource.com/571010
> Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
> Reviewed-by: Ben Titzer <titzer@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#47671}
TBR=titzer@chromium.org,clemensh@chromium.org
Change-Id: I76a50e355f0390cc53a2da4ceedd8830ca20a9c6
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:6600
Reviewed-on: https://chromium-review.googlesource.com/640870
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47672}
This refactoring separates graph building from wasm decoding. The
WasmGraphBuilder is just a consumer of the decoded information.
Decoding without any consumer (i.e. just validation) gets 16% faster by
this refactoring, because no TFNode* have to be stored in the value
stack, and all dynamic tests to determine whether the graph should be
build are gone (measured on AngryBots; before: 110.2 +- 3.3ms, after:
92.2 +- 3.1 ms).
This new design will allow us to also attach other consumers, e.g. a
new baseline compiler.
R=titzer@chromium.org
Bug: v8:6600
Change-Id: I4b60f2409d871a16c3c52a37e515bcfb9dbb8f54
Reviewed-on: https://chromium-review.googlesource.com/571010
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Ben Titzer <titzer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47671}
This is a reland of 470a10015d
Original change's description:
> Start migration of try/throw/catch to match proposal.
>
> This CL does the first baby steps on moving the current (experimental)
> exception handling to match that of the WebAssembly proposal.
>
> It does the following:
>
> 1) Use exception tags instead of integers.
>
> 2) Only handle empty exception signatures (i.e. no values associated
> with the exception tag.
>
> 3) Only handle one catch clause.
>
> 4) Be sure to rethrow the exception if the exception tag does not match.
>
> Note: There are many things that need to be fixed, and are too
> numerous to list here. However, the code should have TODO's on each
> missing parts of the implementation.
>
> Also note that the code currently doesn't handle nested catch blocks,
> nor does it change the throw value being an integer. Rather, the
> integer value is still being thrown, and currently is the exception
> tag. Therefore, we don't build an exception object. This is the reason
> why this CL doesn't handle exceptions that pass values.
>
> Also, the current implementation still can't handle multiple modules
> because tag resolution (between) modules has not be implemented yet.
>
> Bug: v8:6577
> Change-Id: Id6d08b641b3c42d1eec7d4db582f2dab35406114
> Reviewed-on: https://chromium-review.googlesource.com/591910
> Reviewed-by: Brad Nelson <bradnelson@chromium.org>
> Commit-Queue: Karl Schimpf <kschimpf@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#47087}
Bug: v8:6577
Change-Id: I41c3309827c292cb787681a95aaef7cf9b931835
Reviewed-on: https://chromium-review.googlesource.com/598968
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Brad Nelson <bradnelson@chromium.org>
Commit-Queue: Brad Nelson <bradnelson@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47100}
This reverts commit 470a10015d.
Reason for revert: GC stress bot failures.
https://uberchromegw.corp.google.com/i/client.v8/builders/V8%20Mac%20GC%20Stress/builds/14522
Original change's description:
> Start migration of try/throw/catch to match proposal.
>
> This CL does the first baby steps on moving the current (experimental)
> exception handling to match that of the WebAssembly proposal.
>
> It does the following:
>
> 1) Use exception tags instead of integers.
>
> 2) Only handle empty exception signatures (i.e. no values associated
> with the exception tag.
>
> 3) Only handle one catch clause.
>
> 4) Be sure to rethrow the exception if the exception tag does not match.
>
> Note: There are many things that need to be fixed, and are too
> numerous to list here. However, the code should have TODO's on each
> missing parts of the implementation.
>
> Also note that the code currently doesn't handle nested catch blocks,
> nor does it change the throw value being an integer. Rather, the
> integer value is still being thrown, and currently is the exception
> tag. Therefore, we don't build an exception object. This is the reason
> why this CL doesn't handle exceptions that pass values.
>
> Also, the current implementation still can't handle multiple modules
> because tag resolution (between) modules has not be implemented yet.
>
> Bug: v8:6577
> Change-Id: Id6d08b641b3c42d1eec7d4db582f2dab35406114
> Reviewed-on: https://chromium-review.googlesource.com/591910
> Reviewed-by: Brad Nelson <bradnelson@chromium.org>
> Commit-Queue: Karl Schimpf <kschimpf@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#47087}
TBR=bradnelson@chromium.org,eholk@chromium.org,kschimpf@chromium.org
Change-Id: I01dc8c40cc1057333a988c1d275ce5f457b0cb64
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:6577
Reviewed-on: https://chromium-review.googlesource.com/598847
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47090}
This CL does the first baby steps on moving the current (experimental)
exception handling to match that of the WebAssembly proposal.
It does the following:
1) Use exception tags instead of integers.
2) Only handle empty exception signatures (i.e. no values associated
with the exception tag.
3) Only handle one catch clause.
4) Be sure to rethrow the exception if the exception tag does not match.
Note: There are many things that need to be fixed, and are too
numerous to list here. However, the code should have TODO's on each
missing parts of the implementation.
Also note that the code currently doesn't handle nested catch blocks,
nor does it change the throw value being an integer. Rather, the
integer value is still being thrown, and currently is the exception
tag. Therefore, we don't build an exception object. This is the reason
why this CL doesn't handle exceptions that pass values.
Also, the current implementation still can't handle multiple modules
because tag resolution (between) modules has not be implemented yet.
Bug: v8:6577
Change-Id: Id6d08b641b3c42d1eec7d4db582f2dab35406114
Reviewed-on: https://chromium-review.googlesource.com/591910
Reviewed-by: Brad Nelson <bradnelson@chromium.org>
Commit-Queue: Karl Schimpf <kschimpf@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47087}
