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}
This brings the wasm-constants.js file inline with that (forked copy) in
the WebAssembly spec repo, which should make it easier to export tests
from V8 to the spec in the future.
R=clemensh@chromium.org
Bug:
Change-Id: I7db23efc2d671f65b614f9dbc97ae2f355f91b04
Reviewed-on: https://chromium-review.googlesource.com/586248
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Ben Titzer <titzer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46894}
* add functionality to wasm-module-builder.js to emit the module name
in the name section.
* extend WasmModule to store the module name length and offset.
* add functionality to module-decoder.cc to decode the module name.
* use the module name for printing stack traces. more uses should
follow.
* extend one message test to contain a module name.
R=ahaas@chromium.org
Change-Id: I94e6f1f2eb99cb656a92a85bb7afe0742292046f
Reviewed-on: https://chromium-review.googlesource.com/530366
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45846}
The format of the name section changed recently. It now contains
subsections of different type (currently for function names or local
variable names).
This CL changes our internal wasm module builders (in JS and C++) to
emit this new format, and changes the decoder to understand it.
We currently only parse the function name section, and ignore names of
local variables. I will later extend this to parse local variable names
when needed for debugging.
R=ahaas@chromium.org, rossberg@chromium.org
BUG=v8:6222
Change-Id: I2627160c25c9209a3f09abe0b88941ec48b24434
Reviewed-on: https://chromium-review.googlesource.com/470247
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Andreas Rossberg <rossberg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44492}
Add a check to appendToTable to catch illegal input, and fix a test
case triggering this check.
Also removing unused variables and fix indentation.
R=ahaas@chromium.org
Change-Id: I0eaa48ab95ef710530a3cfbe94ed4dd419618cda
Reviewed-on: https://chromium-review.googlesource.com/458436
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44027}
This is more renaming work to comply with the naming in the public
design repository. E.g. types are called "value types" and we no longer
refer to ASTs.
R=clemensh@chromium.org
BUG=
Review-Url: https://codereview.chromium.org/2594993002
Cr-Commit-Position: refs/heads/master@{#41891}
If a WebAssembly function is exported, its js-to-wasm wrapper has a
field which contains a reference to the WebAssembly function.
Originally this reference was an index into the export table, which
then contains an index into the function table, which then contains
the metadata of the WebAssembly function.
With this CL we use the index into the function table directly as
the reference to the WebAssembly function.
TEST=mjsunit/wasm/test-import-export-wrapper
R=rossberg@chromium.org, mtrofin@chromium.orgCC=titzer@chromium.org
Review-Url: https://codereview.chromium.org/2472103002
Cr-Commit-Position: refs/heads/master@{#40729}
- Added gating code in the module-decoder to allow SIMD code only when
it can be decoded correctly
- SIMD128 values should not be exported to JS
- Try/Catch should not be available in asmjs modules
- Trivial fixes for S128 values
BUG=chromium:648079
R=ahaas@chromium.org, titzer@chromium.org, bradnelson@chromium.org
Review-Url: https://codereview.chromium.org/2400863003
Cr-Commit-Position: refs/heads/master@{#40067}
Imports and exports in 0xC can be much more than functions, including
tables, memories, and globals. This CL refactors the underlying
organization of imports and exports to support these new import types.
BUG=
Committed: https://crrev.com/599f8a83420346d9cba5ff97bd2a7520468207b6
Review-Url: https://codereview.chromium.org/2390113003
Cr-Original-Commit-Position: refs/heads/master@{#40033}
Cr-Commit-Position: refs/heads/master@{#40050}
Imports and exports in 0xC can be much more than functions, including
tables, memories, and globals. This CL refactors the underlying
organization of imports and exports to support these new import types.
BUG=
Review-Url: https://codereview.chromium.org/2390113003
Cr-Commit-Position: refs/heads/master@{#40033}
This is essentially CL/2275293002, with the difference that the effect
dependencies are now updated correctly.
BUG=
Review-Url: https://codereview.chromium.org/2378773013
Cr-Commit-Position: refs/heads/master@{#39919}
[0xC] Convert to stack machine semantics.
[0xC] Use section codes instead of names.
[0xC] Add elements section decoding.
[0xC] Decoding of globals section.
[0xC] Decoding of memory section.
[0xC] Decoding of imports section.
[0xC] Decoding of exports section.
[0xC] Decoding of data section.
[0xC] Remove CallImport bytecode.
[0xC] Function bodies have an implicit block.
[0xC] Remove the bottom label from loops.
[0xC] Add signatures to blocks.
[0xC] Remove arities from branches.
Add tests for init expression decoding.
Rework compilation of import wrappers and how they are patched.
Rework function indices in debugging.
Fix ASM->WASM builder for stack machine.
Reorganize asm.js foreign functions due to import indices change.
R=ahaas@chromium.org,rossberg@chromium.org,bradnelson@chromium.org
BUG=chromium:575167
LOG=Y
Committed: https://crrev.com/76eb976a67273b8c03c744f64ad850b0432554b9
Review-Url: https://codereview.chromium.org/2345593003
Cr-Original-Commit-Position: refs/heads/master@{#39678}
Cr-Commit-Position: refs/heads/master@{#39795}
Reason for revert:
Main suspect for tsan:
https://build.chromium.org/p/client.v8/builders/V8%20Linux64%20TSAN/builds/11893
Also changes layout tests:
https://build.chromium.org/p/client.v8.fyi/builders/V8-Blink%20Linux%2064/builds/10036
+mips builder:
https://build.chromium.org/p/client.v8.ports/builders/V8%20Mips%20-%20builder/builds/4032
Original issue's description:
> [wasm] Master CL for Binary 0xC changes.
>
> [0xC] Convert to stack machine semantics.
> [0xC] Use section codes instead of names.
> [0xC] Add elements section decoding.
> [0xC] Decoding of globals section.
> [0xC] Decoding of memory section.
> [0xC] Decoding of imports section.
> [0xC] Decoding of exports section.
> [0xC] Decoding of data section.
> [0xC] Remove CallImport bytecode.
> [0xC] Function bodies have an implicit block.
> [0xC] Remove the bottom label from loops.
> [0xC] Add signatures to blocks.
> [0xC] Remove arities from branches.
> Add tests for init expression decoding.
> Rework compilation of import wrappers and how they are patched.
> Rework function indices in debugging.
> Fix ASM->WASM builder for stack machine.
> Reorganize asm.js foreign functions due to import indices change.
>
> R=ahaas@chromium.org,rossberg@chromium.org,bradnelson@chromium.org
> BUG=chromium:575167
> LOG=Y
>
> Committed: https://crrev.com/76eb976a67273b8c03c744f64ad850b0432554b9
> Cr-Commit-Position: refs/heads/master@{#39678}
TBR=ahaas@chromium.org,bradnelson@chromium.org,mtrofin@chromium.org,rossberg@chromium.org,bradnelson@google.com,titzer@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:575167
Review-Url: https://codereview.chromium.org/2361053004
Cr-Commit-Position: refs/heads/master@{#39685}
[0xC] Convert to stack machine semantics.
[0xC] Use section codes instead of names.
[0xC] Add elements section decoding.
[0xC] Decoding of globals section.
[0xC] Decoding of memory section.
[0xC] Decoding of imports section.
[0xC] Decoding of exports section.
[0xC] Decoding of data section.
[0xC] Remove CallImport bytecode.
[0xC] Function bodies have an implicit block.
[0xC] Remove the bottom label from loops.
[0xC] Add signatures to blocks.
[0xC] Remove arities from branches.
Add tests for init expression decoding.
Rework compilation of import wrappers and how they are patched.
Rework function indices in debugging.
Fix ASM->WASM builder for stack machine.
Reorganize asm.js foreign functions due to import indices change.
R=ahaas@chromium.org,rossberg@chromium.org,bradnelson@chromium.org
BUG=chromium:575167
LOG=Y
Review-Url: https://codereview.chromium.org/2345593003
Cr-Commit-Position: refs/heads/master@{#39678}
This CL implements the throw wasm opcode. This is a pre-requisite for
implementing try-catches in wasm.
BUG=
Review-Url: https://codereview.chromium.org/2339053003
Cr-Commit-Position: refs/heads/master@{#39449}
With this CL we use isolate->native_context() to provide a context for
the CEntryStub of the runtime call. The native_context() is sufficient
here because Runtime::kWasmThrowTypeError does not use the context.
R=titzer@chromium.org
TEST=mjsunit/wasm/ffi-error.js
BUG=chromium:639492
Review-Url: https://codereview.chromium.org/2291043002
Cr-Commit-Position: refs/heads/master@{#39014}
While we might at some point want to explore if this is a win versus
whole modules, for now we have the Tables interface planned.
R=titzer@chromium.org,ahaas@chromium.org,mtrofin@chromium.org,rossberg@chromium.org
BUG=v8:5044
Review-Url: https://codereview.chromium.org/2226053002
Cr-Commit-Position: refs/heads/master@{#38461}
This patch updates internal data structures used by V8 to support
multiple indirect function tables (WebAssembly/design#682). But, since
this feature is post-MVP, the functionality is not directly exposed and
parsing/generation of WebAssembly is left unchanged. Nevertheless, it
is being used in an experiment to implement fine-grained control flow
integrity based on C/C++ types.
BUG=
Review-Url: https://codereview.chromium.org/2174123002
Cr-Commit-Position: refs/heads/master@{#38110}
This cl also fixes two bugs in the previous code:
1) JITed functions were not allowed access to the heap because the module instance wasn't correctly synthesized. This wasn't discovered in the previous test.
2) Decoding of functions with the JITSingleFunction opcode was off by 1 as the length of the opcode wasn't computed correctly.
BUG=5044
Review-Url: https://codereview.chromium.org/2168183002
Cr-Commit-Position: refs/heads/master@{#37957}
- Add Simd128 type to Wasm AST types
- Add a pass that converts SIMD machine ops to runtime calls
- Sample opcodes Int32x4Splat, Int32x4ExtractLane and test
- Separate out generic SIMD Machine ops as these cannot be
handled by runtime functions just yet.
LOG=N
BUG=v8:4124
R=bradnelson@chromium.org, bbudge@chromium.org, titzer@chromium.org
Review-Url: https://codereview.chromium.org/1991143002
Cr-Commit-Position: refs/heads/master@{#37789}
The runtime JIT function is passed in the function table to hook up the compiled code and the starting address of the memory to locate the bytes to be compiled.
BUG=5044
Review-Url: https://codereview.chromium.org/2137993003
Cr-Commit-Position: refs/heads/master@{#37735}
Add a flag to gate experimental support for dynamic code loading and JITing (at runtime in a wasm module).
Enhancing functionality of the indirect function table to support JITing and dynamic linking by allowing additional space to be filled with an "undefined" function signature.
BUG=v8:5044
LOG=N
TEST=None
R=mtrofin@chromium.org,bradnelson@chromium.org
Review-Url: https://codereview.chromium.org/2049513003
Cr-Commit-Position: refs/heads/master@{#37159}
[wasm] Binary 11: Swap the order of section name / section length.
[wasm] Binary 11: Shorter section names.
[wasm] Binary 11: Add a prefix for function type declarations.
[wasm] Binary 11: Function types encoded as pcount, p*, rcount, r*
[wasm] Fix numeric names for functions.
R=rossberg@chromium.org,jfb@chromium.org,ahaas@chromium.org
BUG=chromium:575167
LOG=Y
Review-Url: https://codereview.chromium.org/1896863003
Cr-Commit-Position: refs/heads/master@{#35897}
[wasm] Binary 11: br_table takes a value.
[wasm] Binary 11: Add implicit blocks to if arms.
[wasm] Binary 11: Add arities to call, return, and breaks
[wasm] Binary 11: Add experimental version.
This CL changes the encoder, decoder, and tests to use a postorder
encoding of the AST, which is more efficient in decode time and
space.
R=bradnelson@chromium.org,rossberg@chromium.org,binji@chromium.org
BUG=chromium:575167
LOG=Y
Review-Url: https://codereview.chromium.org/1830663002
Cr-Commit-Position: refs/heads/master@{#35896}
Before, just a string was thrown, so no stack trace was attached there.
Generated code from wasm does not grow by this change, we just pass a
message id to the respective (new) runtime function.
R=mstarzinger@chromium.org, titzer@chromium.org
BUG=
Review URL: https://codereview.chromium.org/1874383002
Cr-Commit-Position: refs/heads/master@{#35664}
Local declarations were previously encoded as an optional set of
4 uint16 values as part of the function declaration. This CL
implements the current design of moving these declarations to
a list of pairs of (type, count) that is part of the body.
R=bradnelson@chromium.org,binji@chromium.org
BUG=
Review URL: https://codereview.chromium.org/1763433002
Cr-Commit-Position: refs/heads/master@{#34564}
