Automatically assigning owner based on suspected regression changelist https://chromium.googlesource.com/v8/v8/+/b380525b3b5f6b07b7d419a69f328ebf59b9b800 ([wasm] Implement I32AtomicLoad, I32AtomicStore ops).

If this is incorrect, please let us know why and apply the Test-Predator-Wrong-CLs label. If you aren't the correct owner for this issue, please unassign yourself as soon as possible so it can be re-triaged.

This does not impact stable, the executed op is behind a flag in d8 (--experimental-wasm-threads). Editing labels accordingly. 

The following revision refers to this bug:
  https://chromium.googlesource.com/v8/v8.git/+/2fcf6da494550c0a3c3ec2173bfc6f73c9ab635b

commit 2fcf6da494550c0a3c3ec2173bfc6f73c9ab635b
Author: Deepti Gandluri <gdeepti@chromium.org>
Date: Wed Sep 05 22:39:58 2018

[wasm] Add runtime checks for misaligned atomic accesses

BUG:  v8:6532 ,  chromium:874809 
Change-Id: I55c00e8563741908cf0daf263152ce927ae18e7c
Reviewed-on: https://chromium-review.googlesource.com/1205812
Commit-Queue: Deepti Gandluri <gdeepti@chromium.org>
Reviewed-by: Ben Smith <binji@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55666}
[modify] https://crrev.com/2fcf6da494550c0a3c3ec2173bfc6f73c9ab635b/src/builtins/builtins-definitions.h
[modify] https://crrev.com/2fcf6da494550c0a3c3ec2173bfc6f73c9ab635b/src/compiler/wasm-compiler.cc
[modify] https://crrev.com/2fcf6da494550c0a3c3ec2173bfc6f73c9ab635b/src/compiler/wasm-compiler.h
[modify] https://crrev.com/2fcf6da494550c0a3c3ec2173bfc6f73c9ab635b/src/globals.h
[modify] https://crrev.com/2fcf6da494550c0a3c3ec2173bfc6f73c9ab635b/src/messages.h
[modify] https://crrev.com/2fcf6da494550c0a3c3ec2173bfc6f73c9ab635b/test/mjsunit/wasm/atomics.js
[modify] https://crrev.com/2fcf6da494550c0a3c3ec2173bfc6f73c9ab635b/test/mjsunit/wasm/wasm-constants.js

ClusterFuzz has detected this issue as fixed in range 55665:55666.

Detailed report: https://clusterfuzz.com/testcase?key=5889010556469248

Fuzzer: binaryen_wasm_fuzzer
Job Type: linux_asan_d8_v8_arm64_dbg
Platform Id: linux

Crash Type: DCHECK failure
Crash Address: 
Crash State:
  address % access_size == 0 in simulator-arm64.cc
  v8::internal::Simulator::VisitLoadStoreAcquireRelease
  v8::internal::Simulator::ExecuteInstruction
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_asan_d8_v8_arm64_dbg&range=48251:48252
Fixed: https://clusterfuzz.com/revisions?job=linux_asan_d8_v8_arm64_dbg&range=55665:55666

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5889010556469248

See https://github.com/google/clusterfuzz-tools for more information.

If you suspect that the result above is incorrect, try re-doing that job on the test case report page.

ClusterFuzz testcase 5889010556469248 is verified as fixed, so closing issue as verified.

If this is incorrect, please add ClusterFuzz-Wrong label and re-open the issue.

Your change meets the bar and is auto-approved for M70. Please go ahead and merge the CL to branch 3538 manually. Please contact milestone owner if you have questions.
Owners: benmason@(Android), kariahda@(iOS), geohsu@(ChromeOS), abdulsyed@(Desktop)

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

This issue has been approved for a merge. Please merge the fix to any appropriate branches as soon as possible!

If all merges have been completed, please remove any remaining Merge-Approved labels from this issue.

Thanks for your time! To disable nags, add the Disable-Nags label.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

This issue has been approved for a merge. Please merge the fix to any appropriate branches as soon as possible!

If all merges have been completed, please remove any remaining Merge-Approved labels from this issue.

Thanks for your time! To disable nags, add the Disable-Nags label.

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The following revision refers to this bug:
  https://chromium.googlesource.com/v8/v8.git/+/0b769a29ff14764d05d8d9fb12a501d3eb18b078

commit 0b769a29ff14764d05d8d9fb12a501d3eb18b078
Author: Deepti Gandluri <gdeepti@chromium.org>
Date: Fri Sep 14 17:13:12 2018

Merged:[wasm] Add runtime checks for misaligned atomic accesses

NOTRY=true
NOPRESUBMIT=true
NOTREECHECKS=true

BUG:  v8:6532 ,  chromium:874809 
Change-Id: I55c00e8563741908cf0daf263152ce927ae18e7c
Reviewed-on: https://chromium-review.googlesource.com/1205812
Commit-Queue: Deepti Gandluri <gdeepti@chromium.org>
Reviewed-by: Ben Smith <binji@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#55666}(cherry picked from commit 2fcf6da494550c0a3c3ec2173bfc6f73c9ab635b)
Reviewed-on: https://chromium-review.googlesource.com/1226412
Cr-Commit-Position: refs/branch-heads/7.0@{#25}
Cr-Branched-From: 6e2adae6f7f8e891cfd01f3280482b20590427a6-refs/heads/7.0.276@{#1}
Cr-Branched-From: bc08a8624cbbea7a2d30071472bc73ad9544eadf-refs/heads/master@{#55424}
[modify] https://crrev.com/0b769a29ff14764d05d8d9fb12a501d3eb18b078/src/builtins/builtins-definitions.h
[modify] https://crrev.com/0b769a29ff14764d05d8d9fb12a501d3eb18b078/src/compiler/wasm-compiler.cc
[modify] https://crrev.com/0b769a29ff14764d05d8d9fb12a501d3eb18b078/src/compiler/wasm-compiler.h
[modify] https://crrev.com/0b769a29ff14764d05d8d9fb12a501d3eb18b078/src/globals.h
[modify] https://crrev.com/0b769a29ff14764d05d8d9fb12a501d3eb18b078/src/messages.h
[modify] https://crrev.com/0b769a29ff14764d05d8d9fb12a501d3eb18b078/test/mjsunit/wasm/atomics.js
[modify] https://crrev.com/0b769a29ff14764d05d8d9fb12a501d3eb18b078/test/mjsunit/wasm/wasm-constants.js

I'm afraid the VRP panel declined to reward, as this issue affected the simulator. (Additionally, we are confident that we would have fixed this before the feature came out from behind a flag), but thanks for the report nevertheless!

This bug has been closed for more than 14 weeks. Removing security view restrictions.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot