take lock around access to dirties cache

[ucwong]

No description provided.

[codecov]

Codecov Report

Merging #1835 (9db596d) into master (2b8db2f) will decrease coverage by 0.09%.
Report is 10 commits behind head on master.
The diff coverage is 32.58%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1835      +/-   ##
==========================================
- Coverage   52.72%   52.64%   -0.09%     
==========================================
  Files         485      484       -1     
  Lines       60556    60424     -132     
==========================================
- Hits        31931    31811     -120     
- Misses      26163    26173      +10     
+ Partials     2462     2440      -22     

Files	Coverage Δ
core/state/state_object.go	70.06% <100.00%> (+0.41%)	⬆️
core/state/statedb.go	56.81% <ø> (-0.08%)	⬇️
cmd/cortex/cvm.go	3.26% <0.00%> (ø)
cmd/devp2p/discv5cmd.go	0.00% <0.00%> (ø)
core/state_prefetcher.go	36.36% <0.00%> (ø)
ctxc/api.go	4.89% <0.00%> (ø)
ctxc/state_accessor.go	0.00% <0.00%> (ø)
trie/database.go	47.80% <90.00%> (-0.27%)	⬇️
core/state_processor.go	70.58% <62.50%> (ø)
signer/core/auditlog.go	0.00% <0.00%> (ø)
... and 9 more

... and 13 files with indirect coverage changes