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trie: use explicit errors in stacktrie (instead of panic) #28361

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merged 5 commits into from
Oct 25, 2023

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@holiman holiman commented Oct 17, 2023

Follow-up to #28350 .
This PR removes panics from stacktrie (mostly), and makes the Update return errors instead. While adding tests for this, I also found that one case of possible corruption was not caught.

If we inserted into an existing node, we noticed and panic:ed. However, it was possible to insert into an "empty slot" further back, so inserting at 0xaa followed by 0x10 did not panic. To handle that, I now added a lastPath to the stacktrie, to keep record of the path of the last inserted item.

This can also be useful for keeping track of the right hand boundary.

@holiman holiman changed the title trie: avoid stacktrie panic trie: use explicit errors in stacktrie (instead of panic) Oct 17, 2023
if bytes.Compare(t.last, k) >= 0 {
return errors.New("non-ascending key order")
}
if err := t.insert(t.root, k, value, nil); err != nil {
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We need to track/update the first/last markers, then do the insertion.
Otherwise the key of current inserted entry will be larger than last, can be detected as right boundary?

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Right!

trie/stacktrie.go Outdated Show resolved Hide resolved
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holiman commented Oct 24, 2023

Closing this for now, might not be needed any more

@holiman holiman closed this Oct 24, 2023
@holiman holiman reopened this Oct 24, 2023
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holiman commented Oct 25, 2023

@rjl493456442 PTAL

@holiman holiman added this to the 1.13.5 milestone Oct 25, 2023
@holiman holiman merged commit 96b7503 into ethereum:master Oct 25, 2023
1 of 2 checks passed
devopsbo3 pushed a commit to HorizenOfficial/go-ethereum that referenced this pull request Nov 10, 2023
…8361)

This PR removes panics from stacktrie (mostly), and makes the Update return errors instead. While adding tests for this, I also found that one case of possible corruption was not caught, which is now fixed.
devopsbo3 added a commit to HorizenOfficial/go-ethereum that referenced this pull request Nov 10, 2023
devopsbo3 added a commit to HorizenOfficial/go-ethereum that referenced this pull request Nov 10, 2023
Dergarcon pushed a commit to specialmechanisms/mev-geth-0x2mev that referenced this pull request Jan 31, 2024
…8361)

This PR removes panics from stacktrie (mostly), and makes the Update return errors instead. While adding tests for this, I also found that one case of possible corruption was not caught, which is now fixed.
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2 participants