tree 967ac7e42298975aa2e6dbf68774a3e03aa565ff
parent 25daff618d393961359166227b496ae126897ac3
author Alexander Markov <alexmarkov@google.com> 1556644040 +0000
committer commit-bot@chromium.org <commit-bot@chromium.org> 1556644040 +0000

[vm/reload] Make sure classes in saved class table are visited by GC

Previously, IsolateReloadContext::CheckpointClasses() was filling
local_saved_class_table with raw pointers to classes and at the same
time it was adding classes to the set which is based on Array.
After that local_saved_class_table was saved into saved_class_table_
were it becomes visible to GC. However, adding an element to the set
may trigger GC in the middle and pointers for already processed
classes in local_saved_class_table are not visited and are not updated
if GC moves a Class object.

Also, IsolateReloadContext::VisitObjectPointers was not visiting
classes in saved_class_table_ properly as it was interpreting it as
an array of saved_num_cids_ pointers (while it is an array of
ClassAndSize elements).

This change fixes flaky crashes in vm/dart/trigger_gc_in_native_test.

Change-Id: I25b2e50995cf580bc9347f06875d344f75a1a950
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/100728
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Commit-Queue: Alexander Markov <alexmarkov@google.com>