mirror of
https://github.com/bitcoin/bitcoin.git
synced 2024-11-19 09:53:47 +01:00
799968e8b3
- mention 'Lost X events' workaround
- clarify flush tracepoint docs
- fix typo in tracepoint context
- clarify flush for prune
The documentation and examples for the `fFlushForPrune` argument
of the utxocache flush tracepoint weren't clear without looking
at the code.
See these comments: https://github.com/bitcoin/bitcoin/pull/22902#issuecomment-987094612
- doc: note that there can be temporary UTXO caches
Bitcoin Core uses temporary clones of it's _main_ UTXO cache in some
places. The utxocache:add and :spent tracepoints are triggered when
temporary caches are changed too. This is documented.
87 lines
1.8 KiB
Plaintext
Executable File
87 lines
1.8 KiB
Plaintext
Executable File
#!/usr/bin/env bpftrace
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/*
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USAGE:
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bpftrace contrib/tracing/log_utxos.bt
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This script requires a 'bitcoind' binary compiled with eBPF support and the
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'utxocache' tracepoints. By default, it's assumed that 'bitcoind' is
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located in './src/bitcoind'. This can be modified in the script below.
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NOTE: requires bpftrace v0.12.0 or above.
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*/
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BEGIN
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{
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printf("%-7s %-71s %16s %7s %8s\n",
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"OP", "Outpoint", "Value", "Height", "Coinbase");
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}
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/*
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Attaches to the 'utxocache:add' tracepoint and prints additions to the UTXO set cache.
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*/
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usdt:./src/bitcoind:utxocache:add
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{
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$txid = arg0;
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$index = (uint32)arg1;
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$height = (uint32)arg2;
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$value = (int64)arg3;
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$isCoinbase = arg4;
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printf("Added ");
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$p = $txid + 31;
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unroll(32) {
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$b = *(uint8*)$p;
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printf("%02x", $b);
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$p-=1;
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}
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printf(":%-6d %16ld %7d %s\n", $index, $value, $height, ($isCoinbase ? "Yes" : "No" ));
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}
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/*
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Attaches to the 'utxocache:spent' tracepoint and prints spents from the UTXO set cache.
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*/
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usdt:./src/bitcoind:utxocache:spent
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{
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$txid = arg0;
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$index = (uint32)arg1;
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$height = (uint32)arg2;
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$value = (int64)arg3;
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$isCoinbase = arg4;
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printf("Spent ");
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$p = $txid + 31;
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unroll(32) {
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$b = *(uint8*)$p;
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printf("%02x", $b);
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$p-=1;
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}
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printf(":%-6d %16ld %7d %s\n", $index, $value, $height, ($isCoinbase ? "Yes" : "No" ));
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}
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/*
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Attaches to the 'utxocache:uncache' tracepoint and uncache UTXOs from the UTXO set cache.
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*/
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usdt:./src/bitcoind:utxocache:uncache
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{
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$txid = arg0;
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$index = (uint32)arg1;
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$height = (uint32)arg2;
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$value = (int64)arg3;
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$isCoinbase = arg4;
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printf("Uncache ");
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$p = $txid + 31;
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unroll(32) {
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$b = *(uint8*)$p;
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printf("%02x", $b);
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$p-=1;
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}
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printf(":%-6d %16ld %7d %s\n", $index, $value, $height, ($isCoinbase ? "Yes" : "No" ));
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}
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