1890156 - Crash in [@ js::gc::UnmapInternal]

Status: NEW

(Core :: JavaScript: GC, defect, P3)

Description

[BugBot [:suhaib / :marco]]

Crash report: https://crash-stats.mozilla.org/report/index/b4e73c3a-ec3f-4cd2-97c3-e95ff0240406

MOZ_CRASH Reason: MOZ_RELEASE_ASSERT(VirtualFree(region, 0, 0x00008000) != 0)

Top 10 frames of crashing thread:

0  xul.dll  AnnotateMozCrashReason  mfbt/Assertions.h:46
0  xul.dll  js::gc::UnmapInternal  js/src/gc/Memory.cpp:221
0  xul.dll  js::gc::TryToAlignChunk  js/src/gc/Memory.cpp:694
0  xul.dll  js::gc::MapAlignedPagesRandom  js/src/gc/Memory.cpp:561
0  xul.dll  js::gc::MapAlignedPages  js/src/gc/Memory.cpp:450
1  xul.dll  js::gc::TenuredChunk::allocate  js/src/gc/Allocator.cpp:625
1  xul.dll  js::gc::BackgroundAllocTask::run  js/src/gc/Allocator.cpp:613
2  xul.dll  js::GCParallelTask::runTask  js/src/gc/GCParallelTask.cpp:209
3  xul.dll  js::GCParallelTask::runHelperThreadTask  js/src/gc/GCParallelTask.cpp:193
4  xul.dll  js::GlobalHelperThreadState::runTaskLocked  js/src/vm/HelperThreads.cpp:1729

By querying Nightly crashes reported within the last 2 months, here are some insights about the signature:

• First crash report: 2024-03-03
• Process type: Content
• Is startup crash: No
• Has user comments: No
• Is null crash: No

Comment 1

[BugBot [:suhaib / :marco]]

The Bugbug bot thinks this bug should belong to the 'Core::JavaScript: GC' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Comment 2

[Jon Coppeard (:jonco)]

Probably due to OOM. This crash has system memory usage at 96%.

Comment 3

[Worcester12345]

(In reply to Jon Coppeard (:jonco) from comment #2)

Probably due to OOM. This crash has system memory usage at 96%.

Is this why typing in Facebook is abysmally slow? I can type two sentences, and wait 5 minutes for all the letters to fill in.

Comment 4

[Jon Coppeard (:jonco)]

(In reply to Worcester12345 from comment #3)
That doesn't sound related to this bug. Please take a profile and file a bug if it looks like a Firefox problem.