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limit the number of instructions that can be evaluated #2459

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merged 2 commits into from
May 4, 2023
Merged

limit the number of instructions that can be evaluated #2459

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113492f
limit the number of instructions that can be evaluated
tyrelr Apr 16, 2023
c6004cb
code cleanup
tyrelr May 3, 2023
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8 changes: 8 additions & 0 deletions sqlx-sqlite/src/connection/explain.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -428,13 +428,21 @@ pub(super) fn explain(

let mut visited_branch_state: HashSet<BranchStateHash> = HashSet::new();

let mut gas = 500_000;
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let mut result_states = Vec::new();

while let Some(mut state) = states.pop() {
while state.program_i < program_size {
let (_, ref opcode, p1, p2, p3, ref p4) = program[state.program_i];
state.history.push(state.program_i);

//limit the number of 'instructions' that can be evaluated
if gas > 0 {
gas -= 1;
} else if gas == 0 {
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break;
}

if state.visited[state.program_i] > MAX_LOOP_COUNT {
if logger.log_enabled() {
let program_history: Vec<&(i64, String, i64, i64, i64, Vec<u8>)> =
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