contracts: Fix double charge of gas for host functions #3361
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deuszx
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Feb 18, 2024
xermicus
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Feb 19, 2024
pgherveou
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Feb 19, 2024
Co-authored-by: PG Herveou <pgherveou@gmail.com>
Co-authored-by: PG Herveou <pgherveou@gmail.com>
kostekIV
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Feb 28, 2024
This PR is fixing a bug in the sync mechanism between wasmi and pallet-contracts. This bug leads to essentially double charging all the gas that was used during the execution of the host function. When the `call` host function is used for recursion this will lead to a quadratic amount of gas consumption with regard to the nesting depth.We also took the chance to refactor the code in question and improve the rust docs. The bug was caused by not updating `GasMeter::executor_consumed` (previously `engine_consumed`) when leaving the host function. This lead to the value being stale (too low) when entering another host function. --------- Co-authored-by: PG Herveou <pgherveou@gmail.com>
kostekIV
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Feb 28, 2024
This PR is fixing a bug in the sync mechanism between wasmi and pallet-contracts. This bug leads to essentially double charging all the gas that was used during the execution of the host function. When the `call` host function is used for recursion this will lead to a quadratic amount of gas consumption with regard to the nesting depth.We also took the chance to refactor the code in question and improve the rust docs. The bug was caused by not updating `GasMeter::executor_consumed` (previously `engine_consumed`) when leaving the host function. This lead to the value being stale (too low) when entering another host function. --------- Co-authored-by: PG Herveou <pgherveou@gmail.com>
kostekIV
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Feb 28, 2024
…) (#4) This PR is fixing a bug in the sync mechanism between wasmi and pallet-contracts. This bug leads to essentially double charging all the gas that was used during the execution of the host function. When the `call` host function is used for recursion this will lead to a quadratic amount of gas consumption with regard to the nesting depth.We also took the chance to refactor the code in question and improve the rust docs. The bug was caused by not updating `GasMeter::executor_consumed` (previously `engine_consumed`) when leaving the host function. This lead to the value being stale (too low) when entering another host function. --------- Co-authored-by: Alexander Theißen <alex.theissen@me.com> Co-authored-by: PG Herveou <pgherveou@gmail.com>
lesniak43
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Mar 11, 2024
…) (#4) This PR is fixing a bug in the sync mechanism between wasmi and pallet-contracts. This bug leads to essentially double charging all the gas that was used during the execution of the host function. When the `call` host function is used for recursion this will lead to a quadratic amount of gas consumption with regard to the nesting depth.We also took the chance to refactor the code in question and improve the rust docs. The bug was caused by not updating `GasMeter::executor_consumed` (previously `engine_consumed`) when leaving the host function. This lead to the value being stale (too low) when entering another host function. --------- Co-authored-by: Alexander Theißen <alex.theissen@me.com> Co-authored-by: PG Herveou <pgherveou@gmail.com>
pmikolajczyk41
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Mar 18, 2024
This PR is fixing a bug in the sync mechanism between wasmi and pallet-contracts. This bug leads to essentially double charging all the gas that was used during the execution of the host function. When the `call` host function is used for recursion this will lead to a quadratic amount of gas consumption with regard to the nesting depth.We also took the chance to refactor the code in question and improve the rust docs. The bug was caused by not updating `GasMeter::executor_consumed` (previously `engine_consumed`) when leaving the host function. This lead to the value being stale (too low) when entering another host function. --------- Co-authored-by: PG Herveou <pgherveou@gmail.com> (cherry picked from commit f3a6b6d)
pmikolajczyk41
pushed a commit
to Cardinal-Cryptography/polkadot-sdk
that referenced
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Mar 18, 2024
This PR is fixing a bug in the sync mechanism between wasmi and pallet-contracts. This bug leads to essentially double charging all the gas that was used during the execution of the host function. When the `call` host function is used for recursion this will lead to a quadratic amount of gas consumption with regard to the nesting depth.We also took the chance to refactor the code in question and improve the rust docs. The bug was caused by not updating `GasMeter::executor_consumed` (previously `engine_consumed`) when leaving the host function. This lead to the value being stale (too low) when entering another host function. --------- Co-authored-by: PG Herveou <pgherveou@gmail.com> (cherry picked from commit f3a6b6d)
bgallois
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Mar 25, 2024
This PR is fixing a bug in the sync mechanism between wasmi and pallet-contracts. This bug leads to essentially double charging all the gas that was used during the execution of the host function. When the `call` host function is used for recursion this will lead to a quadratic amount of gas consumption with regard to the nesting depth.We also took the chance to refactor the code in question and improve the rust docs. The bug was caused by not updating `GasMeter::executor_consumed` (previously `engine_consumed`) when leaving the host function. This lead to the value being stale (too low) when entering another host function. --------- Co-authored-by: PG Herveou <pgherveou@gmail.com>
lesniak43
pushed a commit
to Cardinal-Cryptography/polkadot-sdk
that referenced
this pull request
Apr 8, 2024
…) (#4) This PR is fixing a bug in the sync mechanism between wasmi and pallet-contracts. This bug leads to essentially double charging all the gas that was used during the execution of the host function. When the `call` host function is used for recursion this will lead to a quadratic amount of gas consumption with regard to the nesting depth.We also took the chance to refactor the code in question and improve the rust docs. The bug was caused by not updating `GasMeter::executor_consumed` (previously `engine_consumed`) when leaving the host function. This lead to the value being stale (too low) when entering another host function. --------- Co-authored-by: Alexander Theißen <alex.theissen@me.com> Co-authored-by: PG Herveou <pgherveou@gmail.com>
lesniak43
pushed a commit
to Cardinal-Cryptography/polkadot-sdk
that referenced
this pull request
Apr 22, 2024
…) (#4) This PR is fixing a bug in the sync mechanism between wasmi and pallet-contracts. This bug leads to essentially double charging all the gas that was used during the execution of the host function. When the `call` host function is used for recursion this will lead to a quadratic amount of gas consumption with regard to the nesting depth.We also took the chance to refactor the code in question and improve the rust docs. The bug was caused by not updating `GasMeter::executor_consumed` (previously `engine_consumed`) when leaving the host function. This lead to the value being stale (too low) when entering another host function. --------- Co-authored-by: Alexander Theißen <alex.theissen@me.com> Co-authored-by: PG Herveou <pgherveou@gmail.com>
lesniak43
pushed a commit
to Cardinal-Cryptography/polkadot-sdk
that referenced
this pull request
May 24, 2024
…) (#4) This PR is fixing a bug in the sync mechanism between wasmi and pallet-contracts. This bug leads to essentially double charging all the gas that was used during the execution of the host function. When the `call` host function is used for recursion this will lead to a quadratic amount of gas consumption with regard to the nesting depth.We also took the chance to refactor the code in question and improve the rust docs. The bug was caused by not updating `GasMeter::executor_consumed` (previously `engine_consumed`) when leaving the host function. This lead to the value being stale (too low) when entering another host function. --------- Co-authored-by: Alexander Theißen <alex.theissen@me.com> Co-authored-by: PG Herveou <pgherveou@gmail.com>
This was referenced Jun 5, 2024
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This PR is fixing a bug in the sync mechanism between wasmi and pallet-contracts. This bug leads to essentially double charging all the gas that was used during the execution of the host function. When the
callhost function is used for recursion this will lead to a quadratic amount of gas consumption with regard to the nesting depth.We also took the chance to refactor the code in question and improve the rust docs.The bug was caused by not updating
GasMeter::executor_consumed(previouslyengine_consumed) when leaving the host function. This lead to the value being stale (too low) when entering another host function.